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-rw-r--r--Documentation/core-api/timekeeping.rst12
-rw-r--r--Documentation/devicetree/bindings/timer/nxp,sysctr-timer.txt25
-rw-r--r--MAINTAINERS14
-rw-r--r--arch/arm/include/asm/arch_timer.h10
-rw-r--r--arch/arm64/Kconfig3
-rw-r--r--arch/arm64/Makefile23
-rw-r--r--arch/arm64/include/asm/arch_timer.h13
-rw-r--r--arch/arm64/include/asm/elf.h14
-rw-r--r--arch/arm64/include/asm/signal32.h46
-rw-r--r--arch/arm64/include/asm/unistd.h5
-rw-r--r--arch/arm64/include/asm/vdso.h3
-rw-r--r--arch/arm64/include/asm/vdso/compat_barrier.h44
-rw-r--r--arch/arm64/include/asm/vdso/compat_gettimeofday.h126
-rw-r--r--arch/arm64/include/asm/vdso/gettimeofday.h103
-rw-r--r--arch/arm64/include/asm/vdso/vsyscall.h53
-rw-r--r--arch/arm64/kernel/Makefile6
-rw-r--r--arch/arm64/kernel/asm-offsets.c34
-rw-r--r--arch/arm64/kernel/signal32.c72
-rw-r--r--arch/arm64/kernel/vdso.c356
-rw-r--r--arch/arm64/kernel/vdso/Makefile41
-rw-r--r--arch/arm64/kernel/vdso/gettimeofday.S323
-rw-r--r--arch/arm64/kernel/vdso/vgettimeofday.c27
-rw-r--r--arch/arm64/kernel/vdso32/.gitignore2
-rw-r--r--arch/arm64/kernel/vdso32/Makefile186
-rw-r--r--arch/arm64/kernel/vdso32/note.c15
-rw-r--r--arch/arm64/kernel/vdso32/sigreturn.S62
-rw-r--r--arch/arm64/kernel/vdso32/vdso.S19
-rw-r--r--arch/arm64/kernel/vdso32/vdso.lds.S82
-rw-r--r--arch/arm64/kernel/vdso32/vgettimeofday.c59
-rw-r--r--arch/x86/Kconfig3
-rw-r--r--arch/x86/entry/vdso/Makefile9
-rw-r--r--arch/x86/entry/vdso/vclock_gettime.c256
-rw-r--r--arch/x86/entry/vdso/vdso.lds.S2
-rw-r--r--arch/x86/entry/vdso/vdso32/vdso32.lds.S2
-rw-r--r--arch/x86/entry/vdso/vdsox32.lds.S1
-rw-r--r--arch/x86/entry/vdso/vma.c2
-rw-r--r--arch/x86/entry/vsyscall/Makefile2
-rw-r--r--arch/x86/entry/vsyscall/vsyscall_gtod.c83
-rw-r--r--arch/x86/hyperv/hv_init.c91
-rw-r--r--arch/x86/include/asm/hyperv-tlfs.h6
-rw-r--r--arch/x86/include/asm/mshyperv.h81
-rw-r--r--arch/x86/include/asm/pvclock.h2
-rw-r--r--arch/x86/include/asm/vdso/gettimeofday.h261
-rw-r--r--arch/x86/include/asm/vdso/vsyscall.h44
-rw-r--r--arch/x86/include/asm/vgtod.h75
-rw-r--r--arch/x86/include/asm/vvar.h7
-rw-r--r--arch/x86/kernel/cpu/mshyperv.c4
-rw-r--r--arch/x86/kernel/pvclock.c1
-rw-r--r--arch/x86/kvm/pmu.c4
-rw-r--r--arch/x86/kvm/x86.c13
-rw-r--r--drivers/clocksource/Kconfig14
-rw-r--r--drivers/clocksource/Makefile5
-rw-r--r--drivers/clocksource/arc_timer.c3
-rw-r--r--drivers/clocksource/arm_arch_timer.c15
-rw-r--r--drivers/clocksource/exynos_mct.c4
-rw-r--r--drivers/clocksource/hyperv_timer.c339
-rw-r--r--drivers/clocksource/timer-davinci.c369
-rw-r--r--drivers/clocksource/timer-imx-sysctr.c145
-rw-r--r--drivers/clocksource/timer-ixp4xx.c16
-rw-r--r--drivers/clocksource/timer-meson6.c5
-rw-r--r--drivers/clocksource/timer-tegra.c416
-rw-r--r--drivers/clocksource/timer-tegra20.c379
-rw-r--r--drivers/gpu/drm/amd/amdkfd/kfd_chardev.c2
-rw-r--r--drivers/hv/Kconfig3
-rw-r--r--drivers/hv/hv.c156
-rw-r--r--drivers/hv/hv_util.c1
-rw-r--r--drivers/hv/hyperv_vmbus.h3
-rw-r--r--drivers/hv/vmbus_drv.c42
-rw-r--r--drivers/iio/humidity/dht11.c8
-rw-r--r--drivers/iio/industrialio-core.c4
-rw-r--r--drivers/infiniband/hw/mlx4/alias_GUID.c6
-rw-r--r--drivers/leds/trigger/ledtrig-activity.c2
-rw-r--r--drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c2
-rw-r--r--drivers/net/wireless/intel/iwlwifi/mvm/rx.c2
-rw-r--r--drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c2
-rw-r--r--drivers/net/wireless/intel/iwlwifi/mvm/utils.c2
-rw-r--r--drivers/net/wireless/mac80211_hwsim.c2
-rw-r--r--drivers/net/wireless/ti/wlcore/main.c2
-rw-r--r--drivers/net/wireless/ti/wlcore/rx.c2
-rw-r--r--drivers/net/wireless/ti/wlcore/tx.c2
-rw-r--r--drivers/net/wireless/virt_wifi.c2
-rw-r--r--include/asm-generic/vdso/vsyscall.h50
-rw-r--r--include/clocksource/hyperv_timer.h107
-rw-r--r--include/clocksource/timer-davinci.h44
-rw-r--r--include/linux/cpuhotplug.h2
-rw-r--r--include/linux/hrtimer.h16
-rw-r--r--include/linux/hrtimer_defs.h27
-rw-r--r--include/linux/timekeeping.h32
-rw-r--r--include/linux/timer.h27
-rw-r--r--include/net/cfg80211.h2
-rw-r--r--include/vdso/datapage.h89
-rw-r--r--include/vdso/helpers.h56
-rw-r--r--include/vdso/vsyscall.h11
-rw-r--r--kernel/bpf/syscall.c2
-rw-r--r--kernel/events/core.c4
-rw-r--r--kernel/fork.c2
-rw-r--r--kernel/time/Makefile1
-rw-r--r--kernel/time/alarmtimer.c1
-rw-r--r--kernel/time/clocksource.c4
-rw-r--r--kernel/time/hrtimer.c8
-rw-r--r--kernel/time/ntp.c4
-rw-r--r--kernel/time/posix-timers.c13
-rw-r--r--kernel/time/time.c4
-rw-r--r--kernel/time/timekeeping.c2
-rw-r--r--kernel/time/timer_list.c36
-rw-r--r--kernel/time/vsyscall.c133
-rw-r--r--lib/Kconfig5
-rw-r--r--lib/vdso/Kconfig36
-rw-r--r--lib/vdso/Makefile22
-rw-r--r--lib/vdso/gettimeofday.c239
-rw-r--r--tools/testing/selftests/timers/freq-step.c6
111 files changed, 3929 insertions, 1738 deletions
diff --git a/Documentation/core-api/timekeeping.rst b/Documentation/core-api/timekeeping.rst
index 93cbeb9daec0..20ee447a50f3 100644
--- a/Documentation/core-api/timekeeping.rst
+++ b/Documentation/core-api/timekeeping.rst
@@ -65,7 +65,7 @@ different format depending on what is required by the user:
.. c:function:: u64 ktime_get_ns( void )
u64 ktime_get_boottime_ns( void )
u64 ktime_get_real_ns( void )
- u64 ktime_get_tai_ns( void )
+ u64 ktime_get_clocktai_ns( void )
u64 ktime_get_raw_ns( void )
Same as the plain ktime_get functions, but returning a u64 number
@@ -99,16 +99,20 @@ Coarse and fast_ns access
Some additional variants exist for more specialized cases:
-.. c:function:: ktime_t ktime_get_coarse_boottime( void )
+.. c:function:: ktime_t ktime_get_coarse( void )
+ ktime_t ktime_get_coarse_boottime( void )
ktime_t ktime_get_coarse_real( void )
ktime_t ktime_get_coarse_clocktai( void )
- ktime_t ktime_get_coarse_raw( void )
+
+.. c:function:: u64 ktime_get_coarse_ns( void )
+ u64 ktime_get_coarse_boottime_ns( void )
+ u64 ktime_get_coarse_real_ns( void )
+ u64 ktime_get_coarse_clocktai_ns( void )
.. c:function:: void ktime_get_coarse_ts64( struct timespec64 * )
void ktime_get_coarse_boottime_ts64( struct timespec64 * )
void ktime_get_coarse_real_ts64( struct timespec64 * )
void ktime_get_coarse_clocktai_ts64( struct timespec64 * )
- void ktime_get_coarse_raw_ts64( struct timespec64 * )
These are quicker than the non-coarse versions, but less accurate,
corresponding to CLOCK_MONONOTNIC_COARSE and CLOCK_REALTIME_COARSE
diff --git a/Documentation/devicetree/bindings/timer/nxp,sysctr-timer.txt b/Documentation/devicetree/bindings/timer/nxp,sysctr-timer.txt
new file mode 100644
index 000000000000..d57659996d62
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/nxp,sysctr-timer.txt
@@ -0,0 +1,25 @@
+NXP System Counter Module(sys_ctr)
+
+The system counter(sys_ctr) is a programmable system counter which provides
+a shared time base to Cortex A15, A7, A53, A73, etc. it is intended for use in
+applications where the counter is always powered and support multiple,
+unrelated clocks. The compare frame inside can be used for timer purpose.
+
+Required properties:
+
+- compatible : should be "nxp,sysctr-timer"
+- reg : Specifies the base physical address and size of the comapre
+ frame and the counter control, read & compare.
+- interrupts : should be the first compare frames' interrupt
+- clocks : Specifies the counter clock.
+- clock-names: Specifies the clock's name of this module
+
+Example:
+
+ system_counter: timer@306a0000 {
+ compatible = "nxp,sysctr-timer";
+ reg = <0x306a0000 0x20000>;/* system-counter-rd & compare */
+ clocks = <&clk_8m>;
+ clock-names = "per";
+ interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>;
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index bcb37428522a..8b8a17349e4f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6687,6 +6687,18 @@ L: kvm@vger.kernel.org
S: Supported
F: drivers/uio/uio_pci_generic.c
+GENERIC VDSO LIBRARY:
+M: Andy Lutomirski <luto@kernel.org>
+M: Thomas Gleixner <tglx@linutronix.de>
+M: Vincenzo Frascino <vincenzo.frascino@arm.com>
+L: linux-kernel@vger.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/vdso
+S: Maintained
+F: lib/vdso/
+F: kernel/time/vsyscall.c
+F: include/vdso/
+F: include/asm-generic/vdso/vsyscall.h
+
GENWQE (IBM Generic Workqueue Card)
M: Frank Haverkamp <haver@linux.ibm.com>
S: Supported
@@ -7324,6 +7336,7 @@ F: arch/x86/include/asm/trace/hyperv.h
F: arch/x86/include/asm/hyperv-tlfs.h
F: arch/x86/kernel/cpu/mshyperv.c
F: arch/x86/hyperv
+F: drivers/clocksource/hyperv_timer.c
F: drivers/hid/hid-hyperv.c
F: drivers/hv/
F: drivers/input/serio/hyperv-keyboard.c
@@ -7334,6 +7347,7 @@ F: drivers/uio/uio_hv_generic.c
F: drivers/video/fbdev/hyperv_fb.c
F: drivers/iommu/hyperv_iommu.c
F: net/vmw_vsock/hyperv_transport.c
+F: include/clocksource/hyperv_timer.h
F: include/linux/hyperv.h
F: include/uapi/linux/hyperv.h
F: tools/hv/
diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h
index 4b66ecd6be99..99175812d903 100644
--- a/arch/arm/include/asm/arch_timer.h
+++ b/arch/arm/include/asm/arch_timer.h
@@ -4,6 +4,7 @@
#include <asm/barrier.h>
#include <asm/errno.h>
+#include <asm/hwcap.h>
#include <linux/clocksource.h>
#include <linux/init.h>
#include <linux/types.h>
@@ -124,6 +125,15 @@ static inline void arch_timer_set_cntkctl(u32 cntkctl)
isb();
}
+static inline void arch_timer_set_evtstrm_feature(void)
+{
+ elf_hwcap |= HWCAP_EVTSTRM;
+}
+
+static inline bool arch_timer_have_evtstrm_feature(void)
+{
+ return elf_hwcap & HWCAP_EVTSTRM;
+}
#endif
#endif
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 089a834b0ed0..c1734e444fb8 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -108,6 +108,8 @@ config ARM64
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select GENERIC_TIME_VSYSCALL
+ select GENERIC_GETTIMEOFDAY
+ select GENERIC_COMPAT_VDSO if (!CPU_BIG_ENDIAN && COMPAT)
select HANDLE_DOMAIN_IRQ
select HARDIRQS_SW_RESEND
select HAVE_PCI
@@ -161,6 +163,7 @@ config ARM64
select HAVE_SYSCALL_TRACEPOINTS
select HAVE_KPROBES
select HAVE_KRETPROBES
+ select HAVE_GENERIC_VDSO
select IOMMU_DMA if IOMMU_SUPPORT
select IRQ_DOMAIN
select IRQ_FORCED_THREADING
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index e9d2e578cbe6..e3d3fd0a4268 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -49,10 +49,26 @@ $(warning Detected assembler with broken .inst; disassembly will be unreliable)
endif
endif
-KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst)
+ifeq ($(CONFIG_GENERIC_COMPAT_VDSO), y)
+ CROSS_COMPILE_COMPAT ?= $(CONFIG_CROSS_COMPILE_COMPAT_VDSO:"%"=%)
+
+ ifeq ($(CONFIG_CC_IS_CLANG), y)
+ $(warning CROSS_COMPILE_COMPAT is clang, the compat vDSO will not be built)
+ else ifeq ($(CROSS_COMPILE_COMPAT),)
+ $(warning CROSS_COMPILE_COMPAT not defined or empty, the compat vDSO will not be built)
+ else ifeq ($(shell which $(CROSS_COMPILE_COMPAT)gcc 2> /dev/null),)
+ $(error $(CROSS_COMPILE_COMPAT)gcc not found, check CROSS_COMPILE_COMPAT)
+ else
+ export CROSS_COMPILE_COMPAT
+ export CONFIG_COMPAT_VDSO := y
+ compat_vdso := -DCONFIG_COMPAT_VDSO=1
+ endif
+endif
+
+KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst) $(compat_vdso)
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
KBUILD_CFLAGS += $(call cc-disable-warning, psabi)
-KBUILD_AFLAGS += $(lseinstr) $(brokengasinst)
+KBUILD_AFLAGS += $(lseinstr) $(brokengasinst) $(compat_vdso)
KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)
@@ -164,6 +180,9 @@ ifeq ($(KBUILD_EXTMOD),)
prepare: vdso_prepare
vdso_prepare: prepare0
$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h
+ $(if $(CONFIG_COMPAT_VDSO),$(Q)$(MAKE) \
+ $(build)=arch/arm64/kernel/vdso32 \
+ include/generated/vdso32-offsets.h)
endif
define archhelp
diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h
index 6756178c27db..7ae54d7d333a 100644
--- a/arch/arm64/include/asm/arch_timer.h
+++ b/arch/arm64/include/asm/arch_timer.h
@@ -9,6 +9,7 @@
#define __ASM_ARCH_TIMER_H
#include <asm/barrier.h>
+#include <asm/hwcap.h>
#include <asm/sysreg.h>
#include <linux/bug.h>
@@ -229,4 +230,16 @@ static inline int arch_timer_arch_init(void)
return 0;
}
+static inline void arch_timer_set_evtstrm_feature(void)
+{
+ cpu_set_named_feature(EVTSTRM);
+#ifdef CONFIG_COMPAT
+ compat_elf_hwcap |= COMPAT_HWCAP_EVTSTRM;
+#endif
+}
+
+static inline bool arch_timer_have_evtstrm_feature(void)
+{
+ return cpu_have_named_feature(EVTSTRM);
+}
#endif
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
index 325d9515c0f8..3c7037c6ba9b 100644
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h
@@ -202,7 +202,21 @@ typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
({ \
set_thread_flag(TIF_32BIT); \
})
+#ifdef CONFIG_GENERIC_COMPAT_VDSO
+#define COMPAT_ARCH_DLINFO \
+do { \
+ /* \
+ * Note that we use Elf64_Off instead of elf_addr_t because \
+ * elf_addr_t in compat is defined as Elf32_Addr and casting \
+ * current->mm->context.vdso to it triggers a cast warning of \
+ * cast from pointer to integer of different size. \
+ */ \
+ NEW_AUX_ENT(AT_SYSINFO_EHDR, \
+ (Elf64_Off)current->mm->context.vdso); \
+} while (0)
+#else
#define COMPAT_ARCH_DLINFO
+#endif
extern int aarch32_setup_additional_pages(struct linux_binprm *bprm,
int uses_interp);
#define compat_arch_setup_additional_pages \
diff --git a/arch/arm64/include/asm/signal32.h b/arch/arm64/include/asm/signal32.h
index 0418c67f2b8b..bd43d1cf724b 100644
--- a/arch/arm64/include/asm/signal32.h
+++ b/arch/arm64/include/asm/signal32.h
@@ -9,6 +9,52 @@
#ifdef CONFIG_COMPAT
#include <linux/compat.h>
+struct compat_sigcontext {
+ /* We always set these two fields to 0 */
+ compat_ulong_t trap_no;
+ compat_ulong_t error_code;
+
+ compat_ulong_t oldmask;
+ compat_ulong_t arm_r0;
+ compat_ulong_t arm_r1;
+ compat_ulong_t arm_r2;
+ compat_ulong_t arm_r3;
+ compat_ulong_t arm_r4;
+ compat_ulong_t arm_r5;
+ compat_ulong_t arm_r6;
+ compat_ulong_t arm_r7;
+ compat_ulong_t arm_r8;
+ compat_ulong_t arm_r9;
+ compat_ulong_t arm_r10;
+ compat_ulong_t arm_fp;
+ compat_ulong_t arm_ip;
+ compat_ulong_t arm_sp;
+ compat_ulong_t arm_lr;
+ compat_ulong_t arm_pc;
+ compat_ulong_t arm_cpsr;
+ compat_ulong_t fault_address;
+};
+
+struct compat_ucontext {
+ compat_ulong_t uc_flags;
+ compat_uptr_t uc_link;
+ compat_stack_t uc_stack;
+ struct compat_sigcontext uc_mcontext;
+ compat_sigset_t uc_sigmask;
+ int __unused[32 - (sizeof(compat_sigset_t) / sizeof(int))];
+ compat_ulong_t uc_regspace[128] __attribute__((__aligned__(8)));
+};
+
+struct compat_sigframe {
+ struct compat_ucontext uc;
+ compat_ulong_t retcode[2];
+};
+
+struct compat_rt_sigframe {
+ struct compat_siginfo info;
+ struct compat_sigframe sig;
+};
+
int compat_setup_frame(int usig, struct ksignal *ksig, sigset_t *set,
struct pt_regs *regs);
int compat_setup_rt_frame(int usig, struct ksignal *ksig, sigset_t *set,
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index c9f8dd421c5f..2a23614198f1 100644
--- a/arch/arm64/include/asm/unistd.h
+++ b/arch/arm64/include/asm/unistd.h
@@ -22,8 +22,13 @@
#define __NR_compat_exit 1
#define __NR_compat_read 3
#define __NR_compat_write 4
+#define __NR_compat_gettimeofday 78
#define __NR_compat_sigreturn 119
#define __NR_compat_rt_sigreturn 173
+#define __NR_compat_clock_getres 247
+#define __NR_compat_clock_gettime 263
+#define __NR_compat_clock_gettime64 403
+#define __NR_compat_clock_getres_time64 406
/*
* The following SVCs are ARM private.
diff --git a/arch/arm64/include/asm/vdso.h b/arch/arm64/include/asm/vdso.h
index 1f94ec19903c..9c15e0a06301 100644
--- a/arch/arm64/include/asm/vdso.h
+++ b/arch/arm64/include/asm/vdso.h
@@ -17,6 +17,9 @@
#ifndef __ASSEMBLY__
#include <generated/vdso-offsets.h>
+#ifdef CONFIG_COMPAT_VDSO
+#include <generated/vdso32-offsets.h>
+#endif
#define VDSO_SYMBOL(base, name) \
({ \
diff --git a/arch/arm64/include/asm/vdso/compat_barrier.h b/arch/arm64/include/asm/vdso/compat_barrier.h
new file mode 100644
index 000000000000..fb60a88b5ed4
--- /dev/null
+++ b/arch/arm64/include/asm/vdso/compat_barrier.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 ARM Limited
+ */
+#ifndef __COMPAT_BARRIER_H
+#define __COMPAT_BARRIER_H
+
+#ifndef __ASSEMBLY__
+/*
+ * Warning: This code is meant to be used with
+ * ENABLE_COMPAT_VDSO only.
+ */
+#ifndef ENABLE_COMPAT_VDSO
+#error This header is meant to be used with ENABLE_COMPAT_VDSO only
+#endif
+
+#ifdef dmb
+#undef dmb
+#endif
+
+#define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory")
+
+#if __LINUX_ARM_ARCH__ >= 8
+#define aarch32_smp_mb() dmb(ish)
+#define aarch32_smp_rmb() dmb(ishld)
+#define aarch32_smp_wmb() dmb(ishst)
+#else
+#define aarch32_smp_mb() dmb(ish)
+#define aarch32_smp_rmb() aarch32_smp_mb()
+#define aarch32_smp_wmb() dmb(ishst)
+#endif
+
+
+#undef smp_mb
+#undef smp_rmb
+#undef smp_wmb
+
+#define smp_mb() aarch32_smp_mb()
+#define smp_rmb() aarch32_smp_rmb()
+#define smp_wmb() aarch32_smp_wmb()
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __COMPAT_BARRIER_H */
diff --git a/arch/arm64/include/asm/vdso/compat_gettimeofday.h b/arch/arm64/include/asm/vdso/compat_gettimeofday.h
new file mode 100644
index 000000000000..f4812777f5c5
--- /dev/null
+++ b/arch/arm64/include/asm/vdso/compat_gettimeofday.h
@@ -0,0 +1,126 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 ARM Limited
+ */
+#ifndef __ASM_VDSO_GETTIMEOFDAY_H
+#define __ASM_VDSO_GETTIMEOFDAY_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/unistd.h>
+#include <uapi/linux/time.h>
+
+#include <asm/vdso/compat_barrier.h>
+
+#define __VDSO_USE_SYSCALL ULLONG_MAX
+
+#define VDSO_HAS_CLOCK_GETRES 1
+
+static __always_inline
+int gettimeofday_fallback(struct __kernel_old_timeval *_tv,
+ struct timezone *_tz)
+{
+ register struct timezone *tz asm("r1") = _tz;
+ register struct __kernel_old_timeval *tv asm("r0") = _tv;
+ register long ret asm ("r0");
+ register long nr asm("r7") = __NR_compat_gettimeofday;
+
+ asm volatile(
+ " swi #0\n"
+ : "=r" (ret)
+ : "r" (tv), "r" (tz), "r" (nr)
+ : "memory");
+
+ return ret;
+}
+
+static __always_inline
+long clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ register struct __kernel_timespec *ts asm("r1") = _ts;
+ register clockid_t clkid asm("r0") = _clkid;
+ register long ret asm ("r0");
+ register long nr asm("r7") = __NR_compat_clock_gettime64;
+
+ asm volatile(
+ " swi #0\n"
+ : "=r" (ret)
+ : "r" (clkid), "r" (ts), "r" (nr)
+ : "memory");
+
+ return ret;
+}
+
+static __always_inline
+int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ register struct __kernel_timespec *ts asm("r1") = _ts;
+ register clockid_t clkid asm("r0") = _clkid;
+ register long ret asm ("r0");
+ register long nr asm("r7") = __NR_compat_clock_getres_time64;
+
+ /* The checks below are required for ABI consistency with arm */
+ if ((_clkid >= MAX_CLOCKS) && (_ts == NULL))
+ return -EINVAL;
+
+ asm volatile(
+ " swi #0\n"
+ : "=r" (ret)
+ : "r" (clkid), "r" (ts), "r" (nr)
+ : "memory");
+
+ return ret;
+}
+
+static __always_inline u64 __arch_get_hw_counter(s32 clock_mode)
+{
+ u64 res;
+
+ /*
+ * clock_mode == 0 implies that vDSO are enabled otherwise
+ * fallback on syscall.
+ */
+ if (clock_mode)
+ return __VDSO_USE_SYSCALL;
+
+ /*
+ * This isb() is required to prevent that the counter value
+ * is speculated.
+ */
+ isb();
+ asm volatile("mrrc p15, 1, %Q0, %R0, c14" : "=r" (res));
+ /*
+ * This isb() is required to prevent that the seq lock is
+ * speculated.
+ */
+ isb();
+
+ return res;
+}
+
+static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
+{
+ const struct vdso_data *ret;
+
+ /*
+ * This simply puts &_vdso_data into ret. The reason why we don't use
+ * `ret = _vdso_data` is that the compiler tends to optimise this in a
+ * very suboptimal way: instead of keeping &_vdso_data in a register,
+ * it goes through a relocation almost every time _vdso_data must be
+ * accessed (even in subfunctions). This is both time and space
+ * consuming: each relocation uses a word in the code section, and it
+ * has to be loaded at runtime.
+ *
+ * This trick hides the assignment from the compiler. Since it cannot
+ * track where the pointer comes from, it will only use one relocation
+ * where __arch_get_vdso_data() is called, and then keep the result in
+ * a register.
+ */
+ asm volatile("mov %0, %1" : "=r"(ret) : "r"(_vdso_data));
+
+ return ret;
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_VDSO_GETTIMEOFDAY_H */
diff --git a/arch/arm64/include/asm/vdso/gettimeofday.h b/arch/arm64/include/asm/vdso/gettimeofday.h
new file mode 100644
index 000000000000..b08f476b72b4
--- /dev/null
+++ b/arch/arm64/include/asm/vdso/gettimeofday.h
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 ARM Limited
+ */
+#ifndef __ASM_VDSO_GETTIMEOFDAY_H
+#define __ASM_VDSO_GETTIMEOFDAY_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/unistd.h>
+#include <uapi/linux/time.h>
+
+#define __VDSO_USE_SYSCALL ULLONG_MAX
+
+#define VDSO_HAS_CLOCK_GETRES 1
+
+static __always_inline
+int gettimeofday_fallback(struct __kernel_old_timeval *_tv,
+ struct timezone *_tz)
+{
+ register struct timezone *tz asm("x1") = _tz;
+ register struct __kernel_old_timeval *tv asm("x0") = _tv;
+ register long ret asm ("x0");
+ register long nr asm("x8") = __NR_gettimeofday;
+
+ asm volatile(
+ " svc #0\n"
+ : "=r" (ret)
+ : "r" (tv), "r" (tz), "r" (nr)
+ : "memory");
+
+ return ret;
+}
+
+static __always_inline
+long clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ register struct __kernel_timespec *ts asm("x1") = _ts;
+ register clockid_t clkid asm("x0") = _clkid;
+ register long ret asm ("x0");
+ register long nr asm("x8") = __NR_clock_gettime;
+
+ asm volatile(
+ " svc #0\n"
+ : "=r" (ret)
+ : "r" (clkid), "r" (ts), "r" (nr)
+ : "memory");
+
+ return ret;
+}
+
+static __always_inline
+int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ register struct __kernel_timespec *ts asm("x1") = _ts;
+ register clockid_t clkid asm("x0") = _clkid;
+ register long ret asm ("x0");
+ register long nr asm("x8") = __NR_clock_getres;
+
+ asm volatile(
+ " svc #0\n"
+ : "=r" (ret)
+ : "r" (clkid), "r" (ts), "r" (nr)
+ : "memory");
+
+ return ret;
+}
+
+static __always_inline u64 __arch_get_hw_counter(s32 clock_mode)
+{
+ u64 res;
+
+ /*
+ * clock_mode == 0 implies that vDSO are enabled otherwise
+ * fallback on syscall.
+ */
+ if (clock_mode)
+ return __VDSO_USE_SYSCALL;
+
+ /*
+ * This isb() is required to prevent that the counter value
+ * is speculated.
+ */
+ isb();
+ asm volatile("mrs %0, cntvct_el0" : "=r" (res) :: "memory");
+ /*
+ * This isb() is required to prevent that the seq lock is
+ * speculated.#
+ */
+ isb();
+
+ return res;
+}
+
+static __always_inline
+const struct vdso_data *__arch_get_vdso_data(void)
+{
+ return _vdso_data;
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_VDSO_GETTIMEOFDAY_H */
diff --git a/arch/arm64/include/asm/vdso/vsyscall.h b/arch/arm64/include/asm/vdso/vsyscall.h
new file mode 100644
index 000000000000..0c731bfc7c8c
--- /dev/null
+++ b/arch/arm64/include/asm/vdso/vsyscall.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_VDSO_VSYSCALL_H
+#define __ASM_VDSO_VSYSCALL_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/timekeeper_internal.h>
+#include <vdso/datapage.h>
+
+#define VDSO_PRECISION_MASK ~(0xFF00ULL<<48)
+
+extern struct vdso_data *vdso_data;
+
+/*
+ * Update the vDSO data page to keep in sync with kernel timekeeping.
+ */
+static __always_inline
+struct vdso_data *__arm64_get_k_vdso_data(void)
+{
+ return vdso_data;
+}
+#define __arch_get_k_vdso_data __arm64_get_k_vdso_data
+
+static __always_inline
+int __arm64_get_clock_mode(struct timekeeper *tk)
+{
+ u32 use_syscall = !tk->tkr_mono.clock->archdata.vdso_direct;
+
+ return use_syscall;
+}
+#define __arch_get_clock_mode __arm64_get_clock_mode
+
+static __always_inline
+int __arm64_use_vsyscall(struct vdso_data *vdata)
+{
+ return !vdata[CS_HRES_COARSE].clock_mode;
+}
+#define __arch_use_vsyscall __arm64_use_vsyscall
+
+static __always_inline
+void __arm64_update_vsyscall(struct vdso_data *vdata, struct timekeeper *tk)
+{
+ vdata[CS_HRES_COARSE].mask = VDSO_PRECISION_MASK;
+ vdata[CS_RAW].mask = VDSO_PRECISION_MASK;
+}
+#define __arch_update_vsyscall __arm64_update_vsyscall
+
+/* The asm-generic header needs to be included after the definitions above */
+#include <asm-generic/vdso/vsyscall.h>
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_VDSO_VSYSCALL_H */
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 9e7dcb2c31c7..478491f07b4f 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -28,7 +28,10 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE
$(call if_changed,objcopy)
obj-$(CONFIG_COMPAT) += sys32.o signal32.o \
- sigreturn32.o sys_compat.o
+ sys_compat.o
+ifneq ($(CONFIG_COMPAT_VDSO), y)
+obj-$(CONFIG_COMPAT) += sigreturn32.o
+endif
obj-$(CONFIG_KUSER_HELPERS) += kuser32.o
obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o
obj-$(CONFIG_MODULES) += module.o
@@ -62,6 +65,7 @@ obj-$(CONFIG_ARM64_SSBD) += ssbd.o
obj-$(CONFIG_ARM64_PTR_AUTH) += pointer_auth.o
obj-y += vdso/ probes/
+obj-$(CONFIG_COMPAT_VDSO) += vdso32/
head-y := head.o
extra-y += $(head-y) vmlinux.lds
diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c
index 02f08768c298..214685760e1c 100644
--- a/arch/arm64/kernel/asm-offsets.c
+++ b/arch/arm64/kernel/asm-offsets.c
@@ -18,9 +18,9 @@
#include <asm/fixmap.h>
#include <asm/thread_info.h>
#include <asm/memory.h>
+#include <asm/signal32.h>
#include <asm/smp_plat.h>
#include <asm/suspend.h>
-#include <asm/vdso_datapage.h>
#include <linux/kbuild.h>
#include <linux/arm-smccc.h>
@@ -66,6 +66,11 @@ int main(void)
DEFINE(S_STACKFRAME, offsetof(struct pt_regs, stackframe));
DEFINE(S_FRAME_SIZE, sizeof(struct pt_regs));
BLANK();
+#ifdef CONFIG_COMPAT
+ DEFINE(COMPAT_SIGFRAME_REGS_OFFSET, offsetof(struct compat_sigframe, uc.uc_mcontext.arm_r0));
+ DEFINE(COMPAT_RT_SIGFRAME_REGS_OFFSET, offsetof(struct compat_rt_sigframe, sig.uc.uc_mcontext.arm_r0));
+ BLANK();
+#endif
DEFINE(MM_CONTEXT_ID, offsetof(struct mm_struct, context.id.counter));
BLANK();
DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm));
@@ -80,33 +85,6 @@ int main(void)
BLANK();
DEFINE(PREEMPT_DISABLE_OFFSET, PREEMPT_DISABLE_OFFSET);
BLANK();
- DEFINE(CLOCK_REALTIME, CLOCK_REALTIME);
- DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC);
- DEFINE(CLOCK_MONOTONIC_RAW, CLOCK_MONOTONIC_RAW);
- DEFINE(CLOCK_REALTIME_RES, offsetof(struct vdso_data, hrtimer_res));
- DEFINE(CLOCK_REALTIME_COARSE, CLOCK_REALTIME_COARSE);
- DEFINE(CLOCK_MONOTONIC_COARSE,CLOCK_MONOTONIC_COARSE);
- DEFINE(CLOCK_COARSE_RES, LOW_RES_NSEC);
- DEFINE(NSEC_PER_SEC, NSEC_PER_SEC);
- BLANK();
- DEFINE(VDSO_CS_CYCLE_LAST, offsetof(struct vdso_data, cs_cycle_last));
- DEFINE(VDSO_RAW_TIME_SEC, offsetof(struct vdso_data, raw_time_sec));
- DEFINE(VDSO_XTIME_CLK_SEC, offsetof(struct vdso_data, xtime_clock_sec));
- DEFINE(VDSO_XTIME_CRS_SEC, offsetof(struct vdso_data, xtime_coarse_sec));
- DEFINE(VDSO_XTIME_CRS_NSEC, offsetof(struct vdso_data, xtime_coarse_nsec));
- DEFINE(VDSO_WTM_CLK_SEC, offsetof(struct vdso_data, wtm_clock_sec));
- DEFINE(VDSO_TB_SEQ_COUNT, offsetof(struct vdso_data, tb_seq_count));
- DEFINE(VDSO_CS_MONO_MULT, offsetof(struct vdso_data, cs_mono_mult));
- DEFINE(VDSO_CS_SHIFT, offsetof(struct vdso_data, cs_shift));
- DEFINE(VDSO_TZ_MINWEST, offsetof(struct vdso_data, tz_minuteswest));
- DEFINE(VDSO_USE_SYSCALL, offsetof(struct vdso_data, use_syscall));
- BLANK();
- DEFINE(TVAL_TV_SEC, offsetof(struct timeval, tv_sec));
- DEFINE(TSPEC_TV_SEC, offsetof(struct timespec, tv_sec));
- BLANK();
- DEFINE(TZ_MINWEST, offsetof(struct timezone, tz_minuteswest));
- DEFINE(TZ_DSTTIME, offsetof(struct timezone, tz_dsttime));
- BLANK();
DEFINE(CPU_BOOT_STACK, offsetof(struct secondary_data, stack));
DEFINE(CPU_BOOT_TASK, offsetof(struct secondary_data, task));
BLANK();
diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c
index 331d1e5acad4..12a585386c2f 100644
--- a/arch/arm64/kernel/signal32.c
+++ b/arch/arm64/kernel/signal32.c
@@ -18,42 +18,7 @@
#include <asm/traps.h>
#include <linux/uaccess.h>
#include <asm/unistd.h>
-
-struct compat_sigcontext {
- /* We always set these two fields to 0 */
- compat_ulong_t trap_no;
- compat_ulong_t error_code;
-
- compat_ulong_t oldmask;
- compat_ulong_t arm_r0;
- compat_ulong_t arm_r1;
- compat_ulong_t arm_r2;
- compat_ulong_t arm_r3;
- compat_ulong_t arm_r4;
- compat_ulong_t arm_r5;
- compat_ulong_t arm_r6;
- compat_ulong_t arm_r7;
- compat_ulong_t arm_r8;
- compat_ulong_t arm_r9;
- compat_ulong_t arm_r10;
- compat_ulong_t arm_fp;
- compat_ulong_t arm_ip;
- compat_ulong_t arm_sp;
- compat_ulong_t arm_lr;
- compat_ulong_t arm_pc;
- compat_ulong_t arm_cpsr;
- compat_ulong_t fault_address;
-};
-
-struct compat_ucontext {
- compat_ulong_t uc_flags;
- compat_uptr_t uc_link;
- compat_stack_t uc_stack;
- struct compat_sigcontext uc_mcontext;
- compat_sigset_t uc_sigmask;
- int __unused[32 - (sizeof (compat_sigset_t) / sizeof (int))];
- compat_ulong_t uc_regspace[128] __attribute__((__aligned__(8)));
-};
+#include <asm/vdso.h>
struct compat_vfp_sigframe {
compat_ulong_t magic;
@@ -81,16 +46,6 @@ struct compat_aux_sigframe {
unsigned long end_magic;
} __attribute__((__aligned__(8)));
-struct compat_sigframe {
- struct compat_ucontext uc;
- compat_ulong_t retcode[2];
-};
-
-struct compat_rt_sigframe {
- struct compat_siginfo info;
- struct compat_sigframe sig;
-};
-
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set)
@@ -387,6 +342,30 @@ static void compat_setup_return(struct pt_regs *regs, struct k_sigaction *ka,
retcode = ptr_to_compat(ka->sa.sa_restorer);
} else {
/* Set up sigreturn pointer */
+#ifdef CONFIG_COMPAT_VDSO
+ void *vdso_base = current->mm->context.vdso;
+ void *vdso_trampoline;
+
+ if (ka->sa.sa_flags & SA_SIGINFO) {
+ if (thumb) {
+ vdso_trampoline = VDSO_SYMBOL(vdso_base,
+ compat_rt_sigreturn_thumb);
+ } else {
+ vdso_trampoline = VDSO_SYMBOL(vdso_base,
+ compat_rt_sigreturn_arm);
+ }
+ } else {
+ if (thumb) {
+ vdso_trampoline = VDSO_SYMBOL(vdso_base,
+ compat_sigreturn_thumb);
+ } else {
+ vdso_trampoline = VDSO_SYMBOL(vdso_base,
+ compat_sigreturn_arm);
+ }
+ }
+
+ retcode = ptr_to_compat(vdso_trampoline) + thumb;
+#else
unsigned int idx = thumb << 1;
if (ka->sa.sa_flags & SA_SIGINFO)
@@ -394,6 +373,7 @@ static void compat_setup_return(struct pt_regs *regs, struct k_sigaction *ka,
retcode = (unsigned long)current->mm->context.vdso +
(idx << 2) + thumb;
+#endif
}
regs->regs[0] = usig;
diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c
index 663b166241d0..354b11e27c07 100644
--- a/arch/arm64/kernel/vdso.c
+++ b/arch/arm64/kernel/vdso.c
@@ -20,41 +20,212 @@
#include <linux/slab.h>
#include <linux/timekeeper_internal.h>
#include <linux/vmalloc.h>
+#include <vdso/datapage.h>
+#include <vdso/helpers.h>
+#include <vdso/vsyscall.h>
#include <asm/cacheflush.h>
#include <asm/signal32.h>
#include <asm/vdso.h>
-#include <asm/vdso_datapage.h>
extern char vdso_start[], vdso_end[];
-static unsigned long vdso_pages __ro_after_init;
+#ifdef CONFIG_COMPAT_VDSO
+extern char vdso32_start[], vdso32_end[];
+#endif /* CONFIG_COMPAT_VDSO */
+
+/* vdso_lookup arch_index */
+enum arch_vdso_type {
+ ARM64_VDSO = 0,
+#ifdef CONFIG_COMPAT_VDSO
+ ARM64_VDSO32 = 1,
+#endif /* CONFIG_COMPAT_VDSO */
+};
+#ifdef CONFIG_COMPAT_VDSO
+#define VDSO_TYPES (ARM64_VDSO32 + 1)
+#else
+#define VDSO_TYPES (ARM64_VDSO + 1)
+#endif /* CONFIG_COMPAT_VDSO */
+
+struct __vdso_abi {
+ const char *name;
+ const char *vdso_code_start;
+ const char *vdso_code_end;
+ unsigned long vdso_pages;
+ /* Data Mapping */
+ struct vm_special_mapping *dm;
+ /* Code Mapping */
+ struct vm_special_mapping *cm;
+};
+
+static struct __vdso_abi vdso_lookup[VDSO_TYPES] __ro_after_init = {
+ {
+ .name = "vdso",
+ .vdso_code_start = vdso_start,
+ .vdso_code_end = vdso_end,
+ },
+#ifdef CONFIG_COMPAT_VDSO
+ {
+ .name = "vdso32",
+ .vdso_code_start = vdso32_start,
+ .vdso_code_end = vdso32_end,
+ },
+#endif /* CONFIG_COMPAT_VDSO */
+};
/*
* The vDSO data page.
*/
static union {
- struct vdso_data data;
+ struct vdso_data data[CS_BASES];
u8 page[PAGE_SIZE];
} vdso_data_store __page_aligned_data;
-struct vdso_data *vdso_data = &vdso_data_store.data;
+struct vdso_data *vdso_data = vdso_data_store.data;
+
+static int __vdso_remap(enum arch_vdso_type arch_index,
+ const struct vm_special_mapping *sm,
+ struct vm_area_struct *new_vma)
+{
+ unsigned long new_size = new_vma->vm_end - new_vma->vm_start;
+ unsigned long vdso_size = vdso_lookup[arch_index].vdso_code_end -
+ vdso_lookup[arch_index].vdso_code_start;
+
+ if (vdso_size != new_size)
+ return -EINVAL;
+
+ current->mm->context.vdso = (void *)new_vma->vm_start;
+
+ return 0;
+}
+
+static int __vdso_init(enum arch_vdso_type arch_index)
+{
+ int i;
+ struct page **vdso_pagelist;
+ unsigned long pfn;
+
+ if (memcmp(vdso_lookup[arch_index].vdso_code_start, "\177ELF", 4)) {
+ pr_err("vDSO is not a valid ELF object!\n");
+ return -EINVAL;
+ }
+
+ vdso_lookup[arch_index].vdso_pages = (
+ vdso_lookup[arch_index].vdso_code_end -
+ vdso_lookup[arch_index].vdso_code_start) >>
+ PAGE_SHIFT;
+
+ /* Allocate the vDSO pagelist, plus a page for the data. */
+ vdso_pagelist = kcalloc(vdso_lookup[arch_index].vdso_pages + 1,
+ sizeof(struct page *),
+ GFP_KERNEL);
+ if (vdso_pagelist == NULL)
+ return -ENOMEM;
+
+ /* Grab the vDSO data page. */
+ vdso_pagelist[0] = phys_to_page(__pa_symbol(vdso_data));
+
+
+ /* Grab the vDSO code pages. */
+ pfn = sym_to_pfn(vdso_lookup[arch_index].vdso_code_start);
+
+ for (i = 0; i < vdso_lookup[arch_index].vdso_pages; i++)
+ vdso_pagelist[i + 1] = pfn_to_page(pfn + i);
+
+ vdso_lookup[arch_index].dm->pages = &vdso_pagelist[0];
+ vdso_lookup[arch_index].cm->pages = &vdso_pagelist[1];
+
+ return 0;
+}
+
+static int __setup_additional_pages(enum arch_vdso_type arch_index,
+ struct mm_struct *mm,
+ struct linux_binprm *bprm,
+ int uses_interp)
+{
+ unsigned long vdso_base, vdso_text_len, vdso_mapping_len;
+ void *ret;
+
+ vdso_text_len = vdso_lookup[arch_index].vdso_pages << PAGE_SHIFT;
+ /* Be sure to map the data page */
+ vdso_mapping_len = vdso_text_len + PAGE_SIZE;
+
+ vdso_base = get_unmapped_area(NULL, 0, vdso_mapping_len, 0, 0);
+ if (IS_ERR_VALUE(vdso_base)) {
+ ret = ERR_PTR(vdso_base);
+ goto up_fail;
+ }
+
+ ret = _install_special_mapping(mm, vdso_base, PAGE_SIZE,
+ VM_READ|VM_MAYREAD,
+ vdso_lookup[arch_index].dm);
+ if (IS_ERR(ret))
+ goto up_fail;
+
+ vdso_base += PAGE_SIZE;
+ mm->context.vdso = (void *)vdso_base;
+ ret = _install_special_mapping(mm, vdso_base, vdso_text_len,
+ VM_READ|VM_EXEC|
+ VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC,
+ vdso_lookup[arch_index].cm);
+ if (IS_ERR(ret))
+ goto up_fail;
+
+ return 0;
+
+up_fail:
+ mm->context.vdso = NULL;
+ return PTR_ERR(ret);
+}
#ifdef CONFIG_COMPAT
/*
* Create and map the vectors page for AArch32 tasks.
*/
+#ifdef CONFIG_COMPAT_VDSO
+static int aarch32_vdso_mremap(const struct vm_special_mapping *sm,
+ struct vm_area_struct *new_vma)
+{
+ return __vdso_remap(ARM64_VDSO32, sm, new_vma);
+}
+#endif /* CONFIG_COMPAT_VDSO */
+
+/*
+ * aarch32_vdso_pages:
+ * 0 - kuser helpers
+ * 1 - sigreturn code
+ * or (CONFIG_COMPAT_VDSO):
+ * 0 - kuser helpers
+ * 1 - vdso data
+ * 2 - vdso code
+ */
#define C_VECTORS 0
+#ifdef CONFIG_COMPAT_VDSO
+#define C_VVAR 1
+#define C_VDSO 2
+#define C_PAGES (C_VDSO + 1)
+#else
#define C_SIGPAGE 1
#define C_PAGES (C_SIGPAGE + 1)
+#endif /* CONFIG_COMPAT_VDSO */
static struct page *aarch32_vdso_pages[C_PAGES] __ro_after_init;
-static const struct vm_special_mapping aarch32_vdso_spec[C_PAGES] = {
+static struct vm_special_mapping aarch32_vdso_spec[C_PAGES] = {
{
.name = "[vectors]", /* ABI */
.pages = &aarch32_vdso_pages[C_VECTORS],
},
+#ifdef CONFIG_COMPAT_VDSO
+ {
+ .name = "[vvar]",
+ },
+ {
+ .name = "[vdso]",
+ .mremap = aarch32_vdso_mremap,
+ },
+#else
{
.name = "[sigpage]", /* ABI */
.pages = &aarch32_vdso_pages[C_SIGPAGE],
},
+#endif /* CONFIG_COMPAT_VDSO */
};
static int aarch32_alloc_kuser_vdso_page(void)
@@ -77,7 +248,33 @@ static int aarch32_alloc_kuser_vdso_page(void)
return 0;
}
-static int __init aarch32_alloc_vdso_pages(void)
+#ifdef CONFIG_COMPAT_VDSO
+static int __aarch32_alloc_vdso_pages(void)
+{
+ int ret;
+
+ vdso_lookup[ARM64_VDSO32].dm = &aarch32_vdso_spec[C_VVAR];
+ vdso_lookup[ARM64_VDSO32].cm = &aarch32_vdso_spec[C_VDSO];
+
+ ret = __vdso_init(ARM64_VDSO32);
+ if (ret)
+ return ret;
+
+ ret = aarch32_alloc_kuser_vdso_page();
+ if (ret) {
+ unsigned long c_vvar =
+ (unsigned long)page_to_virt(aarch32_vdso_pages[C_VVAR]);
+ unsigned long c_vdso =
+ (unsigned long)page_to_virt(aarch32_vdso_pages[C_VDSO]);
+
+ free_page(c_vvar);
+ free_page(c_vdso);
+ }
+
+ return ret;
+}
+#else
+static int __aarch32_alloc_vdso_pages(void)
{
extern char __aarch32_sigret_code_start[], __aarch32_sigret_code_end[];
int sigret_sz = __aarch32_sigret_code_end - __aarch32_sigret_code_start;
@@ -98,6 +295,12 @@ static int __init aarch32_alloc_vdso_pages(void)
return ret;
}
+#endif /* CONFIG_COMPAT_VDSO */
+
+static int __init aarch32_alloc_vdso_pages(void)
+{
+ return __aarch32_alloc_vdso_pages();
+}
arch_initcall(aarch32_alloc_vdso_pages);
static int aarch32_kuser_helpers_setup(struct mm_struct *mm)
@@ -119,6 +322,7 @@ static int aarch32_kuser_helpers_setup(struct mm_struct *mm)
return PTR_ERR_OR_ZERO(ret);
}
+#ifndef CONFIG_COMPAT_VDSO
static int aarch32_sigreturn_setup(struct mm_struct *mm)
{
unsigned long addr;
@@ -146,6 +350,7 @@ static int aarch32_sigreturn_setup(struct mm_struct *mm)
out:
return PTR_ERR_OR_ZERO(ret);
}
+#endif /* !CONFIG_COMPAT_VDSO */
int aarch32_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
{
@@ -159,7 +364,14 @@ int aarch32_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
if (ret)
goto out;
+#ifdef CONFIG_COMPAT_VDSO
+ ret = __setup_additional_pages(ARM64_VDSO32,
+ mm,
+ bprm,
+ uses_interp);
+#else
ret = aarch32_sigreturn_setup(mm);
+#endif /* CONFIG_COMPAT_VDSO */
out:
up_write(&mm->mmap_sem);
@@ -170,18 +382,18 @@ out:
static int vdso_mremap(const struct vm_special_mapping *sm,
struct vm_area_struct *new_vma)
{
- unsigned long new_size = new_vma->vm_end - new_vma->vm_start;
- unsigned long vdso_size = vdso_end - vdso_start;
-
- if (vdso_size != new_size)
- return -EINVAL;
-
- current->mm->context.vdso = (void *)new_vma->vm_start;
-
- return 0;
+ return __vdso_remap(ARM64_VDSO, sm, new_vma);
}
-static struct vm_special_mapping vdso_spec[2] __ro_after_init = {
+/*
+ * aarch64_vdso_pages:
+ * 0 - vvar
+ * 1 - vdso
+ */
+#define A_VVAR 0
+#define A_VDSO 1
+#define A_PAGES (A_VDSO + 1)
+static struct vm_special_mapping vdso_spec[A_PAGES] __ro_after_init = {
{
.name = "[vvar]",
},
@@ -193,37 +405,10 @@ static struct vm_special_mapping vdso_spec[2] __ro_after_init = {
static int __init vdso_init(void)
{
- int i;
- struct page **vdso_pagelist;
- unsigned long pfn;
-
- if (memcmp(vdso_start, "\177ELF", 4)) {
- pr_err("vDSO is not a valid ELF object!\n");
- return -EINVAL;
- }
-
- vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT;
-
- /* Allocate the vDSO pagelist, plus a page for the data. */
- vdso_pagelist = kcalloc(vdso_pages + 1, sizeof(struct page *),
- GFP_KERNEL);
- if (vdso_pagelist == NULL)
- return -ENOMEM;
-
- /* Grab the vDSO data page. */
- vdso_pagelist[0] = phys_to_page(__pa_symbol(vdso_data));
-
-
- /* Grab the vDSO code pages. */
- pfn = sym_to_pfn(vdso_start);
-
- for (i = 0; i < vdso_pages; i++)
- vdso_pagelist[i + 1] = pfn_to_page(pfn + i);
+ vdso_lookup[ARM64_VDSO].dm = &vdso_spec[A_VVAR];
+ vdso_lookup[ARM64_VDSO].cm = &vdso_spec[A_VDSO];
- vdso_spec[0].pages = &vdso_pagelist[0];
- vdso_spec[1].pages = &vdso_pagelist[1];
-
- return 0;
+ return __vdso_init(ARM64_VDSO);
}
arch_initcall(vdso_init);
@@ -231,84 +416,17 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
int uses_interp)
{
struct mm_struct *mm = current->mm;
- unsigned long vdso_base, vdso_text_len, vdso_mapping_len;
- void *ret;
-
- vdso_text_len = vdso_pages << PAGE_SHIFT;
- /* Be sure to map the data page */
- vdso_mapping_len = vdso_text_len + PAGE_SIZE;
+ int ret;
if (down_write_killable(&mm->mmap_sem))
return -EINTR;
- vdso_base = get_unmapped_area(NULL, 0, vdso_mapping_len, 0, 0);
- if (IS_ERR_VALUE(vdso_base)) {
- ret = ERR_PTR(vdso_base);
- goto up_fail;
- }
- ret = _install_special_mapping(mm, vdso_base, PAGE_SIZE,
- VM_READ|VM_MAYREAD,
- &vdso_spec[0]);
- if (IS_ERR(ret))
- goto up_fail;
-
- vdso_base += PAGE_SIZE;
- mm->context.vdso = (void *)vdso_base;
- ret = _install_special_mapping(mm, vdso_base, vdso_text_len,
- VM_READ|VM_EXEC|
- VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC,
- &vdso_spec[1]);
- if (IS_ERR(ret))
- goto up_fail;
+ ret = __setup_additional_pages(ARM64_VDSO,
+ mm,
+ bprm,
+ uses_interp);
up_write(&mm->mmap_sem);
- return 0;
-
-up_fail:
- mm->context.vdso = NULL;
- up_write(&mm->mmap_sem);
- return PTR_ERR(ret);
-}
-/*
- * Update the vDSO data page to keep in sync with kernel timekeeping.
- */
-void update_vsyscall(struct timekeeper *tk)
-{
- u32 use_syscall = !tk->tkr_mono.clock->archdata.vdso_direct;
-
- ++vdso_data->tb_seq_count;
- smp_wmb();
-
- vdso_data->use_syscall = use_syscall;
- vdso_data->xtime_coarse_sec = tk->xtime_sec;
- vdso_data->xtime_coarse_nsec = tk->tkr_mono.xtime_nsec >>
- tk->tkr_mono.shift;
- vdso_data->wtm_clock_sec = tk->wall_to_monotonic.tv_sec;
- vdso_data->wtm_clock_nsec = tk->wall_to_monotonic.tv_nsec;
-
- /* Read without the seqlock held by clock_getres() */
- WRITE_ONCE(vdso_data->hrtimer_res, hrtimer_resolution);
-
- if (!use_syscall) {
- /* tkr_mono.cycle_last == tkr_raw.cycle_last */
- vdso_data->cs_cycle_last = tk->tkr_mono.cycle_last;
- vdso_data->raw_time_sec = tk->raw_sec;
- vdso_data->raw_time_nsec = tk->tkr_raw.xtime_nsec;
- vdso_data->xtime_clock_sec = tk->xtime_sec;
- vdso_data->xtime_clock_nsec = tk->tkr_mono.xtime_nsec;
- vdso_data->cs_mono_mult = tk->tkr_mono.mult;
- vdso_data->cs_raw_mult = tk->tkr_raw.mult;
- /* tkr_mono.shift == tkr_raw.shift */
- vdso_data->cs_shift = tk->tkr_mono.shift;
- }
-
- smp_wmb();
- ++vdso_data->tb_seq_count;
-}
-
-void update_vsyscall_tz(void)
-{
- vdso_data->tz_minuteswest = sys_tz.tz_minuteswest;
- vdso_data->tz_dsttime = sys_tz.tz_dsttime;
+ return ret;
}
diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile
index fa230ff09aa1..4ab863045188 100644
--- a/arch/arm64/kernel/vdso/Makefile
+++ b/arch/arm64/kernel/vdso/Makefile
@@ -6,7 +6,12 @@
# Heavily based on the vDSO Makefiles for other archs.
#
-obj-vdso := gettimeofday.o note.o sigreturn.o
+# Absolute relocation type $(ARCH_REL_TYPE_ABS) needs to be defined before
+# the inclusion of generic Makefile.
+ARCH_REL_TYPE_ABS := R_AARCH64_JUMP_SLOT|R_AARCH64_GLOB_DAT|R_AARCH64_ABS64
+include $(srctree)/lib/vdso/Makefile
+
+obj-vdso := vgettimeofday.o note.o sigreturn.o
# Build rules
targets := $(obj-vdso) vdso.so vdso.so.dbg
@@ -15,6 +20,31 @@ obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
ldflags-y := -shared -nostdlib -soname=linux-vdso.so.1 --hash-style=sysv \
--build-id -n -T
+ccflags-y := -fno-common -fno-builtin -fno-stack-protector -ffixed-x18
+ccflags-y += -DDISABLE_BRANCH_PROFILING
+
+VDSO_LDFLAGS := -Bsymbolic
+
+CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os
+KBUILD_CFLAGS += $(DISABLE_LTO)
+KASAN_SANITIZE := n
+UBSAN_SANITIZE := n
+OBJECT_FILES_NON_STANDARD := y
+KCOV_INSTRUMENT := n
+
+ifeq ($(c-gettimeofday-y),)
+CFLAGS_vgettimeofday.o = -O2 -mcmodel=tiny
+else
+CFLAGS_vgettimeofday.o = -O2 -mcmodel=tiny -include $(c-gettimeofday-y)
+endif
+
+# Clang versions less than 8 do not support -mcmodel=tiny
+ifeq ($(CONFIG_CC_IS_CLANG), y)
+ ifeq ($(shell test $(CONFIG_CLANG_VERSION) -lt 80000; echo $$?),0)
+ CFLAGS_REMOVE_vgettimeofday.o += -mcmodel=tiny
+ endif
+endif
+
# Disable gcov profiling for VDSO code
GCOV_PROFILE := n
@@ -28,6 +58,7 @@ $(obj)/vdso.o : $(obj)/vdso.so
# Link rule for the .so file, .lds has to be first
$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE
$(call if_changed,ld)
+ $(call if_changed,vdso_check)
# Strip rule for the .so file
$(obj)/%.so: OBJCOPYFLAGS := -S
@@ -42,13 +73,9 @@ quiet_cmd_vdsosym = VDSOSYM $@
include/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE
$(call if_changed,vdsosym)
-# Assembly rules for the .S files
-$(obj-vdso): %.o: %.S FORCE
- $(call if_changed_dep,vdsoas)
-
# Actual build commands
-quiet_cmd_vdsoas = VDSOA $@
- cmd_vdsoas = $(CC) $(a_flags) -c -o $@ $<
+quiet_cmd_vdsocc = VDSOCC $@
+ cmd_vdsocc = $(CC) $(a_flags) $(c_flags) -c -o $@ $<
# Install commands for the unstripped file
quiet_cmd_vdso_install = INSTALL $@
diff --git a/arch/arm64/kernel/vdso/gettimeofday.S b/arch/arm64/kernel/vdso/gettimeofday.S
index 80f780f56e0d..e69de29bb2d1 100644
--- a/arch/arm64/kernel/vdso/gettimeofday.S
+++ b/arch/arm64/kernel/vdso/gettimeofday.S
@@ -1,323 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Userspace implementations of gettimeofday() and friends.
- *
- * Copyright (C) 2012 ARM Limited
- *
- * Author: Will Deacon <will.deacon@arm.com>
- */
-
-#include <linux/linkage.h>
-#include <asm/asm-offsets.h>
-#include <asm/unistd.h>
-
-#define NSEC_PER_SEC_LO16 0xca00
-#define NSEC_PER_SEC_HI16 0x3b9a
-
-vdso_data .req x6
-seqcnt .req w7
-w_tmp .req w8
-x_tmp .req x8
-
-/*
- * Conventions for macro arguments:
- * - An argument is write-only if its name starts with "res".
- * - All other arguments are read-only, unless otherwise specified.
- */
-
- .macro seqcnt_acquire
-9999: ldr seqcnt, [vdso_data, #VDSO_TB_SEQ_COUNT]
- tbnz seqcnt, #0, 9999b
- dmb ishld
- .endm
-
- .macro seqcnt_check fail
- dmb ishld
- ldr w_tmp, [vdso_data, #VDSO_TB_SEQ_COUNT]
- cmp w_tmp, seqcnt
- b.ne \fail
- .endm
-
- .macro syscall_check fail
- ldr w_tmp, [vdso_data, #VDSO_USE_SYSCALL]
- cbnz w_tmp, \fail
- .endm
-
- .macro get_nsec_per_sec res
- mov \res, #NSEC_PER_SEC_LO16
- movk \res, #NSEC_PER_SEC_HI16, lsl #16
- .endm
-
- /*
- * Returns the clock delta, in nanoseconds left-shifted by the clock
- * shift.
- */
- .macro get_clock_shifted_nsec res, cycle_last, mult
- /* Read the virtual counter. */
- isb
- mrs x_tmp, cntvct_el0
- /* Calculate cycle delta and convert to ns. */
- sub \res, x_tmp, \cycle_last
- /* We can only guarantee 56 bits of precision. */
- movn x_tmp, #0xff00, lsl #48
- and \res, x_tmp, \res
- mul \res, \res, \mult
- /*
- * Fake address dependency from the value computed from the counter
- * register to subsequent data page accesses so that the sequence
- * locking also orders the read of the counter.
- */
- and x_tmp, \res, xzr
- add vdso_data, vdso_data, x_tmp
- .endm
-
- /*
- * Returns in res_{sec,nsec} the REALTIME timespec, based on the
- * "wall time" (xtime) and the clock_mono delta.
- */
- .macro get_ts_realtime res_sec, res_nsec, \
- clock_nsec, xtime_sec, xtime_nsec, nsec_to_sec
- add \res_nsec, \clock_nsec, \xtime_nsec
- udiv x_tmp, \res_nsec, \nsec_to_sec
- add \res_sec, \xtime_sec, x_tmp
- msub \res_nsec, x_tmp, \nsec_to_sec, \res_nsec
- .endm
-
- /*
- * Returns in res_{sec,nsec} the timespec based on the clock_raw delta,
- * used for CLOCK_MONOTONIC_RAW.
- */
- .macro get_ts_clock_raw res_sec, res_nsec, clock_nsec, nsec_to_sec
- udiv \res_sec, \clock_nsec, \nsec_to_sec
- msub \res_nsec, \res_sec, \nsec_to_sec, \clock_nsec
- .endm
-
- /* sec and nsec are modified in place. */
- .macro add_ts sec, nsec, ts_sec, ts_nsec, nsec_to_sec
- /* Add timespec. */
- add \sec, \sec, \ts_sec
- add \nsec, \nsec, \ts_nsec
-
- /* Normalise the new timespec. */
- cmp \nsec, \nsec_to_sec
- b.lt 9999f
- sub \nsec, \nsec, \nsec_to_sec
- add \sec, \sec, #1
-9999:
- cmp \nsec, #0
- b.ge 9998f
- add \nsec, \nsec, \nsec_to_sec
- sub \sec, \sec, #1
-9998:
- .endm
-
- .macro clock_gettime_return, shift=0
- .if \shift == 1
- lsr x11, x11, x12
- .endif
- stp x10, x11, [x1, #TSPEC_TV_SEC]
- mov x0, xzr
- ret
- .endm
-
- .macro jump_slot jumptable, index, label
- .if (. - \jumptable) != 4 * (\index)
- .error "Jump slot index mismatch"
- .endif
- b \label
- .endm
-
- .text
-
-/* int __kernel_gettimeofday(struct timeval *tv, struct timezone *tz); */
-ENTRY(__kernel_gettimeofday)
- .cfi_startproc
- adr vdso_data, _vdso_data
- /* If tv is NULL, skip to the timezone code. */
- cbz x0, 2f
-
- /* Compute the time of day. */
-1: seqcnt_acquire
- syscall_check fail=4f
- ldr x10, [vdso_data, #VDSO_CS_CYCLE_LAST]
- /* w11 = cs_mono_mult, w12 = cs_shift */
- ldp w11, w12, [vdso_data, #VDSO_CS_MONO_MULT]
- ldp x13, x14, [vdso_data, #VDSO_XTIME_CLK_SEC]
-
- get_nsec_per_sec res=x9
- lsl x9, x9, x12
-
- get_clock_shifted_nsec res=x15, cycle_last=x10, mult=x11
- seqcnt_check fail=1b
- get_ts_realtime res_sec=x10, res_nsec=x11, \
- clock_nsec=x15, xtime_sec=x13, xtime_nsec=x14, nsec_to_sec=x9
-
- /* Convert ns to us. */
- mov x13, #1000
- lsl x13, x13, x12
- udiv x11, x11, x13
- stp x10, x11, [x0, #TVAL_TV_SEC]
-2:
- /* If tz is NULL, return 0. */
- cbz x1, 3f
- ldp w4, w5, [vdso_data, #VDSO_TZ_MINWEST]
- stp w4, w5, [x1, #TZ_MINWEST]
-3:
- mov x0, xzr
- ret
-4:
- /* Syscall fallback. */
- mov x8, #__NR_gettimeofday
- svc #0
- ret
- .cfi_endproc
-ENDPROC(__kernel_gettimeofday)
-
-#define JUMPSLOT_MAX CLOCK_MONOTONIC_COARSE
-
-/* int __kernel_clock_gettime(clockid_t clock_id, struct timespec *tp); */
-ENTRY(__kernel_clock_gettime)
- .cfi_startproc
- cmp w0, #JUMPSLOT_MAX
- b.hi syscall
- adr vdso_data, _vdso_data
- adr x_tmp, jumptable
- add x_tmp, x_tmp, w0, uxtw #2
- br x_tmp
-
- ALIGN
-jumptable:
- jump_slot jumptable, CLOCK_REALTIME, realtime
- jump_slot jumptable, CLOCK_MONOTONIC, monotonic
- b syscall
- b syscall
- jump_slot jumptable, CLOCK_MONOTONIC_RAW, monotonic_raw
- jump_slot jumptable, CLOCK_REALTIME_COARSE, realtime_coarse
- jump_slot jumptable, CLOCK_MONOTONIC_COARSE, monotonic_coarse
-
- .if (. - jumptable) != 4 * (JUMPSLOT_MAX + 1)
- .error "Wrong jumptable size"
- .endif
-
- ALIGN
-realtime:
- seqcnt_acquire
- syscall_check fail=syscall
- ldr x10, [vdso_data, #VDSO_CS_CYCLE_LAST]
- /* w11 = cs_mono_mult, w12 = cs_shift */
- ldp w11, w12, [vdso_data, #VDSO_CS_MONO_MULT]
- ldp x13, x14, [vdso_data, #VDSO_XTIME_CLK_SEC]
-
- /* All computations are done with left-shifted nsecs. */
- get_nsec_per_sec res=x9
- lsl x9, x9, x12
-
- get_clock_shifted_nsec res=x15, cycle_last=x10, mult=x11
- seqcnt_check fail=realtime
- get_ts_realtime res_sec=x10, res_nsec=x11, \
- clock_nsec=x15, xtime_sec=x13, xtime_nsec=x14, nsec_to_sec=x9
- clock_gettime_return, shift=1
-
- ALIGN
-monotonic:
- seqcnt_acquire
- syscall_check fail=syscall
- ldr x10, [vdso_data, #VDSO_CS_CYCLE_LAST]
- /* w11 = cs_mono_mult, w12 = cs_shift */
- ldp w11, w12, [vdso_data, #VDSO_CS_MONO_MULT]
- ldp x13, x14, [vdso_data, #VDSO_XTIME_CLK_SEC]
- ldp x3, x4, [vdso_data, #VDSO_WTM_CLK_SEC]
-
- /* All computations are done with left-shifted nsecs. */
- lsl x4, x4, x12
- get_nsec_per_sec res=x9
- lsl x9, x9, x12
-
- get_clock_shifted_nsec res=x15, cycle_last=x10, mult=x11
- seqcnt_check fail=monotonic
- get_ts_realtime res_sec=x10, res_nsec=x11, \
- clock_nsec=x15, xtime_sec=x13, xtime_nsec=x14, nsec_to_sec=x9
-
- add_ts sec=x10, nsec=x11, ts_sec=x3, ts_nsec=x4, nsec_to_sec=x9
- clock_gettime_return, shift=1
-
- ALIGN
-monotonic_raw:
- seqcnt_acquire
- syscall_check fail=syscall
- ldr x10, [vdso_data, #VDSO_CS_CYCLE_LAST]
- /* w11 = cs_raw_mult, w12 = cs_shift */
- ldp w12, w11, [vdso_data, #VDSO_CS_SHIFT]
- ldp x13, x14, [vdso_data, #VDSO_RAW_TIME_SEC]
-
- /* All computations are done with left-shifted nsecs. */
- get_nsec_per_sec res=x9
- lsl x9, x9, x12
-
- get_clock_shifted_nsec res=x15, cycle_last=x10, mult=x11
- seqcnt_check fail=monotonic_raw
- get_ts_clock_raw res_sec=x10, res_nsec=x11, \
- clock_nsec=x15, nsec_to_sec=x9
-
- add_ts sec=x10, nsec=x11, ts_sec=x13, ts_nsec=x14, nsec_to_sec=x9
- clock_gettime_return, shift=1
-
- ALIGN
-realtime_coarse:
- seqcnt_acquire
- ldp x10, x11, [vdso_data, #VDSO_XTIME_CRS_SEC]
- seqcnt_check fail=realtime_coarse
- clock_gettime_return
-
- ALIGN
-monotonic_coarse:
- seqcnt_acquire
- ldp x10, x11, [vdso_data, #VDSO_XTIME_CRS_SEC]
- ldp x13, x14, [vdso_data, #VDSO_WTM_CLK_SEC]
- seqcnt_check fail=monotonic_coarse
-
- /* Computations are done in (non-shifted) nsecs. */
- get_nsec_per_sec res=x9
- add_ts sec=x10, nsec=x11, ts_sec=x13, ts_nsec=x14, nsec_to_sec=x9
- clock_gettime_return
-
- ALIGN
-syscall: /* Syscall fallback. */
- mov x8, #__NR_clock_gettime
- svc #0
- ret
- .cfi_endproc
-ENDPROC(__kernel_clock_gettime)
-
-/* int __kernel_clock_getres(clockid_t clock_id, struct timespec *res); */
-ENTRY(__kernel_clock_getres)
- .cfi_startproc
- cmp w0, #CLOCK_REALTIME
- ccmp w0, #CLOCK_MONOTONIC, #0x4, ne
- ccmp w0, #CLOCK_MONOTONIC_RAW, #0x4, ne
- b.ne 1f
-
- adr vdso_data, _vdso_data
- ldr w2, [vdso_data, #CLOCK_REALTIME_RES]
- b 2f
-1:
- cmp w0, #CLOCK_REALTIME_COARSE
- ccmp w0, #CLOCK_MONOTONIC_COARSE, #0x4, ne
- b.ne 4f
- ldr x2, 5f
-2:
- cbz x1, 3f
- stp xzr, x2, [x1]
-
-3: /* res == NULL. */
- mov w0, wzr
- ret
-
-4: /* Syscall fallback. */
- mov x8, #__NR_clock_getres
- svc #0
- ret
-5:
- .quad CLOCK_COARSE_RES
- .cfi_endproc
-ENDPROC(__kernel_clock_getres)
diff --git a/arch/arm64/kernel/vdso/vgettimeofday.c b/arch/arm64/kernel/vdso/vgettimeofday.c
new file mode 100644
index 000000000000..747635501a14
--- /dev/null
+++ b/arch/arm64/kernel/vdso/vgettimeofday.c
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ARM64 userspace implementations of gettimeofday() and similar.
+ *
+ * Copyright (C) 2018 ARM Limited
+ *
+ */
+#include <linux/time.h>
+#include <linux/types.h>
+
+int __kernel_clock_gettime(clockid_t clock,
+ struct __kernel_timespec *ts)
+{
+ return __cvdso_clock_gettime(clock, ts);
+}
+
+int __kernel_gettimeofday(struct __kernel_old_timeval *tv,
+ struct timezone *tz)
+{
+ return __cvdso_gettimeofday(tv, tz);
+}
+
+int __kernel_clock_getres(clockid_t clock_id,
+ struct __kernel_timespec *res)
+{
+ return __cvdso_clock_getres(clock_id, res);
+}
diff --git a/arch/arm64/kernel/vdso32/.gitignore b/arch/arm64/kernel/vdso32/.gitignore
new file mode 100644
index 000000000000..4fea950fa5ed
--- /dev/null
+++ b/arch/arm64/kernel/vdso32/.gitignore
@@ -0,0 +1,2 @@
+vdso.lds
+vdso.so.raw
diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
new file mode 100644
index 000000000000..288c14d30b45
--- /dev/null
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -0,0 +1,186 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for vdso32
+#
+
+# Absolute relocation type $(ARCH_REL_TYPE_ABS) needs to be defined before
+# the inclusion of generic Makefile.
+ARCH_REL_TYPE_ABS := R_ARM_JUMP_SLOT|R_ARM_GLOB_DAT|R_ARM_ABS32
+include $(srctree)/lib/vdso/Makefile
+
+COMPATCC := $(CROSS_COMPILE_COMPAT)gcc
+
+# Same as cc-*option, but using COMPATCC instead of CC
+cc32-option = $(call try-run,\
+ $(COMPATCC) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))
+cc32-disable-warning = $(call try-run,\
+ $(COMPATCC) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
+cc32-ldoption = $(call try-run,\
+ $(COMPATCC) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
+
+# We cannot use the global flags to compile the vDSO files, the main reason
+# being that the 32-bit compiler may be older than the main (64-bit) compiler
+# and therefore may not understand flags set using $(cc-option ...). Besides,
+# arch-specific options should be taken from the arm Makefile instead of the
+# arm64 one.
+# As a result we set our own flags here.
+
+# From top-level Makefile
+# NOSTDINC_FLAGS
+VDSO_CPPFLAGS := -nostdinc -isystem $(shell $(COMPATCC) -print-file-name=include)
+VDSO_CPPFLAGS += $(LINUXINCLUDE)
+VDSO_CPPFLAGS += $(KBUILD_CPPFLAGS)
+
+# Common C and assembly flags
+# From top-level Makefile
+VDSO_CAFLAGS := $(VDSO_CPPFLAGS)
+VDSO_CAFLAGS += $(call cc32-option,-fno-PIE)
+ifdef CONFIG_DEBUG_INFO
+VDSO_CAFLAGS += -g
+endif
+ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(COMPATCC)), y)
+VDSO_CAFLAGS += -DCC_HAVE_ASM_GOTO
+endif
+
+# From arm Makefile
+VDSO_CAFLAGS += $(call cc32-option,-fno-dwarf2-cfi-asm)
+VDSO_CAFLAGS += -mabi=aapcs-linux -mfloat-abi=soft
+ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
+VDSO_CAFLAGS += -mbig-endian
+else
+VDSO_CAFLAGS += -mlittle-endian
+endif
+
+# From arm vDSO Makefile
+VDSO_CAFLAGS += -fPIC -fno-builtin -fno-stack-protector
+VDSO_CAFLAGS += -DDISABLE_BRANCH_PROFILING
+
+# Try to compile for ARMv8. If the compiler is too old and doesn't support it,
+# fall back to v7. There is no easy way to check for what architecture the code
+# is being compiled, so define a macro specifying that (see arch/arm/Makefile).
+VDSO_CAFLAGS += $(call cc32-option,-march=armv8-a -D__LINUX_ARM_ARCH__=8,\
+ -march=armv7-a -D__LINUX_ARM_ARCH__=7)
+
+VDSO_CFLAGS := $(VDSO_CAFLAGS)
+VDSO_CFLAGS += -DENABLE_COMPAT_VDSO=1
+# KBUILD_CFLAGS from top-level Makefile
+VDSO_CFLAGS += -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
+ -fno-strict-aliasing -fno-common \
+ -Werror-implicit-function-declaration \
+ -Wno-format-security \
+ -std=gnu89
+VDSO_CFLAGS += -O2
+# Some useful compiler-dependent flags from top-level Makefile
+VDSO_CFLAGS += $(call cc32-option,-Wdeclaration-after-statement,)
+VDSO_CFLAGS += $(call cc32-option,-Wno-pointer-sign)
+VDSO_CFLAGS += $(call cc32-option,-fno-strict-overflow)
+VDSO_CFLAGS += $(call cc32-option,-Werror=strict-prototypes)
+VDSO_CFLAGS += $(call cc32-option,-Werror=date-time)
+VDSO_CFLAGS += $(call cc32-option,-Werror=incompatible-pointer-types)
+
+# The 32-bit compiler does not provide 128-bit integers, which are used in
+# some headers that are indirectly included from the vDSO code.
+# This hack makes the compiler happy and should trigger a warning/error if
+# variables of such type are referenced.
+VDSO_CFLAGS += -D__uint128_t='void*'
+# Silence some warnings coming from headers that operate on long's
+# (on GCC 4.8 or older, there is unfortunately no way to silence this warning)
+VDSO_CFLAGS += $(call cc32-disable-warning,shift-count-overflow)
+VDSO_CFLAGS += -Wno-int-to-pointer-cast
+
+VDSO_AFLAGS := $(VDSO_CAFLAGS)
+VDSO_AFLAGS += -D__ASSEMBLY__
+
+VDSO_LDFLAGS := $(VDSO_CPPFLAGS)
+# From arm vDSO Makefile
+VDSO_LDFLAGS += -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1
+VDSO_LDFLAGS += -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
+VDSO_LDFLAGS += -nostdlib -shared -mfloat-abi=soft
+VDSO_LDFLAGS += $(call cc32-ldoption,-Wl$(comma)--hash-style=sysv)
+VDSO_LDFLAGS += $(call cc32-ldoption,-Wl$(comma)--build-id)
+VDSO_LDFLAGS += $(call cc32-ldoption,-fuse-ld=bfd)
+
+
+# Borrow vdsomunge.c from the arm vDSO
+# We have to use a relative path because scripts/Makefile.host prefixes
+# $(hostprogs-y) with $(obj)
+munge := ../../../arm/vdso/vdsomunge
+hostprogs-y := $(munge)
+
+c-obj-vdso := note.o
+c-obj-vdso-gettimeofday := vgettimeofday.o
+asm-obj-vdso := sigreturn.o
+
+ifneq ($(c-gettimeofday-y),)
+VDSO_CFLAGS_gettimeofday_o += -include $(c-gettimeofday-y)
+endif
+
+VDSO_CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os
+
+# Build rules
+targets := $(c-obj-vdso) $(c-obj-vdso-gettimeofday) $(asm-obj-vdso) vdso.so vdso.so.dbg vdso.so.raw
+c-obj-vdso := $(addprefix $(obj)/, $(c-obj-vdso))
+c-obj-vdso-gettimeofday := $(addprefix $(obj)/, $(c-obj-vdso-gettimeofday))
+asm-obj-vdso := $(addprefix $(obj)/, $(asm-obj-vdso))
+obj-vdso := $(c-obj-vdso) $(c-obj-vdso-gettimeofday) $(asm-obj-vdso)
+
+obj-y += vdso.o
+extra-y += vdso.lds
+CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
+
+# Force dependency (vdso.s includes vdso.so through incbin)
+$(obj)/vdso.o: $(obj)/vdso.so
+
+include/generated/vdso32-offsets.h: $(obj)/vdso.so.dbg FORCE
+ $(call if_changed,vdsosym)
+
+# Strip rule for vdso.so
+$(obj)/vdso.so: OBJCOPYFLAGS := -S
+$(obj)/vdso.so: $(obj)/vdso.so.dbg FORCE
+ $(call if_changed,objcopy)
+
+$(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/$(munge) FORCE
+ $(call if_changed,vdsomunge)
+
+# Link rule for the .so file, .lds has to be first
+$(obj)/vdso.so.raw: $(src)/vdso.lds $(obj-vdso) FORCE
+ $(call if_changed,vdsold)
+ $(call if_changed,vdso_check)
+
+# Compilation rules for the vDSO sources
+$(c-obj-vdso): %.o: %.c FORCE
+ $(call if_changed_dep,vdsocc)
+$(c-obj-vdso-gettimeofday): %.o: %.c FORCE
+ $(call if_changed_dep,vdsocc_gettimeofday)
+$(asm-obj-vdso): %.o: %.S FORCE
+ $(call if_changed_dep,vdsoas)
+
+# Actual build commands
+quiet_cmd_vdsold = VDSOL $@
+ cmd_vdsold = $(COMPATCC) -Wp,-MD,$(depfile) $(VDSO_LDFLAGS) \
+ -Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@
+quiet_cmd_vdsocc = VDSOC $@
+ cmd_vdsocc = $(COMPATCC) -Wp,-MD,$(depfile) $(VDSO_CFLAGS) -c -o $@ $<
+quiet_cmd_vdsocc_gettimeofday = VDSOC_GTD $@
+ cmd_vdsocc_gettimeofday = $(COMPATCC) -Wp,-MD,$(depfile) $(VDSO_CFLAGS) $(VDSO_CFLAGS_gettimeofday_o) -c -o $@ $<
+quiet_cmd_vdsoas = VDSOA $@
+ cmd_vdsoas = $(COMPATCC) -Wp,-MD,$(depfile) $(VDSO_AFLAGS) -c -o $@ $<
+
+quiet_cmd_vdsomunge = MUNGE $@
+ cmd_vdsomunge = $(obj)/$(munge) $< $@
+
+# Generate vDSO offsets using helper script (borrowed from the 64-bit vDSO)
+gen-vdsosym := $(srctree)/$(src)/../vdso/gen_vdso_offsets.sh
+quiet_cmd_vdsosym = VDSOSYM $@
+# The AArch64 nm should be able to read an AArch32 binary
+ cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
+
+# Install commands for the unstripped file
+quiet_cmd_vdso_install = INSTALL $@
+ cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/vdso32.so
+
+vdso.so: $(obj)/vdso.so.dbg
+ @mkdir -p $(MODLIB)/vdso
+ $(call cmd,vdso_install)
+
+vdso_install: vdso.so
diff --git a/arch/arm64/kernel/vdso32/note.c b/arch/arm64/kernel/vdso32/note.c
new file mode 100644
index 000000000000..eff5bf9efb8b
--- /dev/null
+++ b/arch/arm64/kernel/vdso32/note.c
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2012-2018 ARM Limited
+ *
+ * This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
+ * Here we can supply some information useful to userland.
+ */
+
+#include <linux/uts.h>
+#include <linux/version.h>
+#include <linux/elfnote.h>
+#include <linux/build-salt.h>
+
+ELFNOTE32("Linux", 0, LINUX_VERSION_CODE);
+BUILD_SALT;
diff --git a/arch/arm64/kernel/vdso32/sigreturn.S b/arch/arm64/kernel/vdso32/sigreturn.S
new file mode 100644
index 000000000000..1a81277c2d09
--- /dev/null
+++ b/arch/arm64/kernel/vdso32/sigreturn.S
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This file provides both A32 and T32 versions, in accordance with the
+ * arm sigreturn code.
+ *
+ * Copyright (C) 2018 ARM Limited
+ */
+
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/unistd.h>
+
+#define ARM_ENTRY(name) \
+ ENTRY(name)
+
+#define ARM_ENDPROC(name) \
+ .type name, %function; \
+ END(name)
+
+ .text
+
+ .arm
+ .fnstart
+ .save {r0-r15}
+ .pad #COMPAT_SIGFRAME_REGS_OFFSET
+ nop
+ARM_ENTRY(__kernel_sigreturn_arm)
+ mov r7, #__NR_compat_sigreturn
+ svc #0
+ .fnend
+ARM_ENDPROC(__kernel_sigreturn_arm)
+
+ .fnstart
+ .save {r0-r15}
+ .pad #COMPAT_RT_SIGFRAME_REGS_OFFSET
+ nop
+ARM_ENTRY(__kernel_rt_sigreturn_arm)
+ mov r7, #__NR_compat_rt_sigreturn
+ svc #0
+ .fnend
+ARM_ENDPROC(__kernel_rt_sigreturn_arm)
+
+ .thumb
+ .fnstart
+ .save {r0-r15}
+ .pad #COMPAT_SIGFRAME_REGS_OFFSET
+ nop
+ARM_ENTRY(__kernel_sigreturn_thumb)
+ mov r7, #__NR_compat_sigreturn
+ svc #0
+ .fnend
+ARM_ENDPROC(__kernel_sigreturn_thumb)
+
+ .fnstart
+ .save {r0-r15}
+ .pad #COMPAT_RT_SIGFRAME_REGS_OFFSET
+ nop
+ARM_ENTRY(__kernel_rt_sigreturn_thumb)
+ mov r7, #__NR_compat_rt_sigreturn
+ svc #0
+ .fnend
+ARM_ENDPROC(__kernel_rt_sigreturn_thumb)
diff --git a/arch/arm64/kernel/vdso32/vdso.S b/arch/arm64/kernel/vdso32/vdso.S
new file mode 100644
index 000000000000..e72ac7bc4c04
--- /dev/null
+++ b/arch/arm64/kernel/vdso32/vdso.S
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2012 ARM Limited
+ */
+
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/const.h>
+#include <asm/page.h>
+
+ .globl vdso32_start, vdso32_end
+ .section .rodata
+ .balign PAGE_SIZE
+vdso32_start:
+ .incbin "arch/arm64/kernel/vdso32/vdso.so"
+ .balign PAGE_SIZE
+vdso32_end:
+
+ .previous
diff --git a/arch/arm64/kernel/vdso32/vdso.lds.S b/arch/arm64/kernel/vdso32/vdso.lds.S
new file mode 100644
index 000000000000..a3944927eaeb
--- /dev/null
+++ b/arch/arm64/kernel/vdso32/vdso.lds.S
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Adapted from arm64 version.
+ *
+ * GNU linker script for the VDSO library.
+ * Heavily based on the vDSO linker scripts for other archs.
+ *
+ * Copyright (C) 2012-2018 ARM Limited
+ */
+
+#include <linux/const.h>
+#include <asm/page.h>
+#include <asm/vdso.h>
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+
+SECTIONS
+{
+ PROVIDE_HIDDEN(_vdso_data = . - PAGE_SIZE);
+ . = VDSO_LBASE + SIZEOF_HEADERS;
+
+ .hash : { *(.hash) } :text
+ .gnu.hash : { *(.gnu.hash) }
+ .dynsym : { *(.dynsym) }
+ .dynstr : { *(.dynstr) }
+ .gnu.version : { *(.gnu.version) }
+ .gnu.version_d : { *(.gnu.version_d) }
+ .gnu.version_r : { *(.gnu.version_r) }
+
+ .note : { *(.note.*) } :text :note
+
+ .dynamic : { *(.dynamic) } :text :dynamic
+
+ .rodata : { *(.rodata*) } :text
+
+ .text : { *(.text*) } :text =0xe7f001f2
+
+ .got : { *(.got) }
+ .rel.plt : { *(.rel.plt) }
+
+ /DISCARD/ : {
+ *(.note.GNU-stack)
+ *(.data .data.* .gnu.linkonce.d.* .sdata*)
+ *(.bss .sbss .dynbss .dynsbss)
+ }
+}
+
+/*
+ * We must supply the ELF program headers explicitly to get just one
+ * PT_LOAD segment, and set the flags explicitly to make segments read-only.
+ */
+PHDRS
+{
+ text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
+ dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
+ note PT_NOTE FLAGS(4); /* PF_R */
+}
+
+VERSION
+{
+ LINUX_2.6 {
+ global:
+ __vdso_clock_gettime;
+ __vdso_gettimeofday;
+ __vdso_clock_getres;
+ __kernel_sigreturn_arm;
+ __kernel_sigreturn_thumb;
+ __kernel_rt_sigreturn_arm;
+ __kernel_rt_sigreturn_thumb;
+ __vdso_clock_gettime64;
+ local: *;
+ };
+}
+
+/*
+ * Make the sigreturn code visible to the kernel.
+ */
+VDSO_compat_sigreturn_arm = __kernel_sigreturn_arm;
+VDSO_compat_sigreturn_thumb = __kernel_sigreturn_thumb;
+VDSO_compat_rt_sigreturn_arm = __kernel_rt_sigreturn_arm;
+VDSO_compat_rt_sigreturn_thumb = __kernel_rt_sigreturn_thumb;
diff --git a/arch/arm64/kernel/vdso32/vgettimeofday.c b/arch/arm64/kernel/vdso32/vgettimeofday.c
new file mode 100644
index 000000000000..54fc1c2ce93f
--- /dev/null
+++ b/arch/arm64/kernel/vdso32/vgettimeofday.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ARM64 compat userspace implementations of gettimeofday() and similar.
+ *
+ * Copyright (C) 2018 ARM Limited
+ *
+ */
+#include <linux/time.h>
+#include <linux/types.h>
+
+int __vdso_clock_gettime(clockid_t clock,
+ struct old_timespec32 *ts)
+{
+ /* The checks below are required for ABI consistency with arm */
+ if ((u32)ts >= TASK_SIZE_32)
+ return -EFAULT;
+
+ return __cvdso_clock_gettime32(clock, ts);
+}
+
+int __vdso_clock_gettime64(clockid_t clock,
+ struct __kernel_timespec *ts)
+{
+ /* The checks below are required for ABI consistency with arm */
+ if ((u32)ts >= TASK_SIZE_32)
+ return -EFAULT;
+
+ return __cvdso_clock_gettime(clock, ts);
+}
+
+int __vdso_gettimeofday(struct __kernel_old_timeval *tv,
+ struct timezone *tz)
+{
+ return __cvdso_gettimeofday(tv, tz);
+}
+
+int __vdso_clock_getres(clockid_t clock_id,
+ struct old_timespec32 *res)
+{
+ /* The checks below are required for ABI consistency with arm */
+ if ((u32)res >= TASK_SIZE_32)
+ return -EFAULT;
+
+ return __cvdso_clock_getres_time32(clock_id, res);
+}
+
+/* Avoid unresolved references emitted by GCC */
+
+void __aeabi_unwind_cpp_pr0(void)
+{
+}
+
+void __aeabi_unwind_cpp_pr1(void)
+{
+}
+
+void __aeabi_unwind_cpp_pr2(void)
+{
+}
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 2bbbd4d1ba31..51a98d6eae8e 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -17,6 +17,7 @@ config X86_32
select HAVE_DEBUG_STACKOVERFLOW
select MODULES_USE_ELF_REL
select OLD_SIGACTION
+ select GENERIC_VDSO_32
config X86_64
def_bool y
@@ -121,6 +122,7 @@ config X86
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select GENERIC_TIME_VSYSCALL
+ select GENERIC_GETTIMEOFDAY
select HARDLOCKUP_CHECK_TIMESTAMP if X86_64
select HAVE_ACPI_APEI if ACPI
select HAVE_ACPI_APEI_NMI if ACPI
@@ -202,6 +204,7 @@ config X86
select HAVE_SYSCALL_TRACEPOINTS
select HAVE_UNSTABLE_SCHED_CLOCK
select HAVE_USER_RETURN_NOTIFIER
+ select HAVE_GENERIC_VDSO
select HOTPLUG_SMT if SMP
select IRQ_FORCED_THREADING
select NEED_SG_DMA_LENGTH
diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
index 42fe42e82baf..39106111be86 100644
--- a/arch/x86/entry/vdso/Makefile
+++ b/arch/x86/entry/vdso/Makefile
@@ -3,6 +3,12 @@
# Building vDSO images for x86.
#
+# Absolute relocation type $(ARCH_REL_TYPE_ABS) needs to be defined before
+# the inclusion of generic Makefile.
+ARCH_REL_TYPE_ABS := R_X86_64_JUMP_SLOT|R_X86_64_GLOB_DAT|R_X86_64_RELATIVE|
+ARCH_REL_TYPE_ABS += R_386_GLOB_DAT|R_386_JMP_SLOT|R_386_RELATIVE
+include $(srctree)/lib/vdso/Makefile
+
KBUILD_CFLAGS += $(DISABLE_LTO)
KASAN_SANITIZE := n
UBSAN_SANITIZE := n
@@ -51,6 +57,7 @@ VDSO_LDFLAGS_vdso.lds = -m elf_x86_64 -soname linux-vdso.so.1 --no-undefined \
$(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
$(call if_changed,vdso)
+ $(call if_changed,vdso_check)
HOST_EXTRACFLAGS += -I$(srctree)/tools/include -I$(srctree)/include/uapi -I$(srctree)/arch/$(SUBARCH)/include/uapi
hostprogs-y += vdso2c
@@ -121,6 +128,7 @@ $(obj)/%.so: $(obj)/%.so.dbg FORCE
$(obj)/vdsox32.so.dbg: $(obj)/vdsox32.lds $(vobjx32s) FORCE
$(call if_changed,vdso)
+ $(call if_changed,vdso_check)
CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds)
VDSO_LDFLAGS_vdso32.lds = -m elf_i386 -soname linux-gate.so.1
@@ -160,6 +168,7 @@ $(obj)/vdso32.so.dbg: FORCE \
$(obj)/vdso32/system_call.o \
$(obj)/vdso32/sigreturn.o
$(call if_changed,vdso)
+ $(call if_changed,vdso_check)
#
# The DSO images are built using a special linker script.
diff --git a/arch/x86/entry/vdso/vclock_gettime.c b/arch/x86/entry/vdso/vclock_gettime.c
index 4aed41f638bb..d9ff616bb0f6 100644
--- a/arch/x86/entry/vdso/vclock_gettime.c
+++ b/arch/x86/entry/vdso/vclock_gettime.c
@@ -1,251 +1,85 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * Copyright 2006 Andi Kleen, SUSE Labs.
- *
* Fast user context implementation of clock_gettime, gettimeofday, and time.
*
+ * Copyright 2006 Andi Kleen, SUSE Labs.
+ * Copyright 2019 ARM Limited
+ *
* 32 Bit compat layer by Stefani Seibold <stefani@seibold.net>
* sponsored by Rohde & Schwarz GmbH & Co. KG Munich/Germany
- *
- * The code should have no internal unresolved relocations.
- * Check with readelf after changing.
*/
-
-#include <uapi/linux/time.h>
-#include <asm/vgtod.h>
-#include <asm/vvar.h>
-#include <asm/unistd.h>
-#include <asm/msr.h>
-#include <asm/pvclock.h>
-#include <asm/mshyperv.h>
-#include <linux/math64.h>
#include <linux/time.h>
#include <linux/kernel.h>
+#include <linux/types.h>
-#define gtod (&VVAR(vsyscall_gtod_data))
+#include "../../../../lib/vdso/gettimeofday.c"
-extern int __vdso_clock_gettime(clockid_t clock, struct timespec *ts);
-extern int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz);
+extern int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz);
extern time_t __vdso_time(time_t *t);
-#ifdef CONFIG_PARAVIRT_CLOCK
-extern u8 pvclock_page[PAGE_SIZE]
- __attribute__((visibility("hidden")));
-#endif
-
-#ifdef CONFIG_HYPERV_TSCPAGE
-extern u8 hvclock_page[PAGE_SIZE]
- __attribute__((visibility("hidden")));
-#endif
-
-#ifndef BUILD_VDSO32
-
-notrace static long vdso_fallback_gettime(long clock, struct timespec *ts)
+int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
{
- long ret;
- asm ("syscall" : "=a" (ret), "=m" (*ts) :
- "0" (__NR_clock_gettime), "D" (clock), "S" (ts) :
- "rcx", "r11");
- return ret;
+ return __cvdso_gettimeofday(tv, tz);
}
-#else
+int gettimeofday(struct __kernel_old_timeval *, struct timezone *)
+ __attribute__((weak, alias("__vdso_gettimeofday")));
-notrace static long vdso_fallback_gettime(long clock, struct timespec *ts)
+time_t __vdso_time(time_t *t)
{
- long ret;
-
- asm (
- "mov %%ebx, %%edx \n"
- "mov %[clock], %%ebx \n"
- "call __kernel_vsyscall \n"
- "mov %%edx, %%ebx \n"
- : "=a" (ret), "=m" (*ts)
- : "0" (__NR_clock_gettime), [clock] "g" (clock), "c" (ts)
- : "edx");
- return ret;
+ return __cvdso_time(t);
}
-#endif
+time_t time(time_t *t) __attribute__((weak, alias("__vdso_time")));
-#ifdef CONFIG_PARAVIRT_CLOCK
-static notrace const struct pvclock_vsyscall_time_info *get_pvti0(void)
-{
- return (const struct pvclock_vsyscall_time_info *)&pvclock_page;
-}
-static notrace u64 vread_pvclock(void)
-{
- const struct pvclock_vcpu_time_info *pvti = &get_pvti0()->pvti;
- u32 version;
- u64 ret;
-
- /*
- * Note: The kernel and hypervisor must guarantee that cpu ID
- * number maps 1:1 to per-CPU pvclock time info.
- *
- * Because the hypervisor is entirely unaware of guest userspace
- * preemption, it cannot guarantee that per-CPU pvclock time
- * info is updated if the underlying CPU changes or that that
- * version is increased whenever underlying CPU changes.
- *
- * On KVM, we are guaranteed that pvti updates for any vCPU are
- * atomic as seen by *all* vCPUs. This is an even stronger
- * guarantee than we get with a normal seqlock.
- *
- * On Xen, we don't appear to have that guarantee, but Xen still
- * supplies a valid seqlock using the version field.
- *
- * We only do pvclock vdso timing at all if
- * PVCLOCK_TSC_STABLE_BIT is set, and we interpret that bit to
- * mean that all vCPUs have matching pvti and that the TSC is
- * synced, so we can just look at vCPU 0's pvti.
- */
-
- do {
- version = pvclock_read_begin(pvti);
-
- if (unlikely(!(pvti->flags & PVCLOCK_TSC_STABLE_BIT)))
- return U64_MAX;
-
- ret = __pvclock_read_cycles(pvti, rdtsc_ordered());
- } while (pvclock_read_retry(pvti, version));
-
- return ret;
-}
-#endif
-#ifdef CONFIG_HYPERV_TSCPAGE
-static notrace u64 vread_hvclock(void)
-{
- const struct ms_hyperv_tsc_page *tsc_pg =
- (const struct ms_hyperv_tsc_page *)&hvclock_page;
+#if defined(CONFIG_X86_64) && !defined(BUILD_VDSO32_64)
+/* both 64-bit and x32 use these */
+extern int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts);
+extern int __vdso_clock_getres(clockid_t clock, struct __kernel_timespec *res);
- return hv_read_tsc_page(tsc_pg);
-}
-#endif
-
-notrace static inline u64 vgetcyc(int mode)
+int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts)
{
- if (mode == VCLOCK_TSC)
- return (u64)rdtsc_ordered();
-
- /*
- * For any memory-mapped vclock type, we need to make sure that gcc
- * doesn't cleverly hoist a load before the mode check. Otherwise we
- * might end up touching the memory-mapped page even if the vclock in
- * question isn't enabled, which will segfault. Hence the barriers.
- */
-#ifdef CONFIG_PARAVIRT_CLOCK
- if (mode == VCLOCK_PVCLOCK) {
- barrier();
- return vread_pvclock();
- }
-#endif
-#ifdef CONFIG_HYPERV_TSCPAGE
- if (mode == VCLOCK_HVCLOCK) {
- barrier();
- return vread_hvclock();
- }
-#endif
- return U64_MAX;
+ return __cvdso_clock_gettime(clock, ts);
}
-notrace static int do_hres(clockid_t clk, struct timespec *ts)
-{
- struct vgtod_ts *base = &gtod->basetime[clk];
- u64 cycles, last, sec, ns;
- unsigned int seq;
-
- do {
- seq = gtod_read_begin(gtod);
- cycles = vgetcyc(gtod->vclock_mode);
- ns = base->nsec;
- last = gtod->cycle_last;
- if (unlikely((s64)cycles < 0))
- return vdso_fallback_gettime(clk, ts);
- if (cycles > last)
- ns += (cycles - last) * gtod->mult;
- ns >>= gtod->shift;
- sec = base->sec;
- } while (unlikely(gtod_read_retry(gtod, seq)));
-
- /*
- * Do this outside the loop: a race inside the loop could result
- * in __iter_div_u64_rem() being extremely slow.
- */
- ts->tv_sec = sec + __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns);
- ts->tv_nsec = ns;
-
- return 0;
-}
+int clock_gettime(clockid_t, struct __kernel_timespec *)
+ __attribute__((weak, alias("__vdso_clock_gettime")));
-notrace static void do_coarse(clockid_t clk, struct timespec *ts)
+int __vdso_clock_getres(clockid_t clock,
+ struct __kernel_timespec *res)
{
- struct vgtod_ts *base = &gtod->basetime[clk];
- unsigned int seq;
-
- do {
- seq = gtod_read_begin(gtod);
- ts->tv_sec = base->sec;
- ts->tv_nsec = base->nsec;
- } while (unlikely(gtod_read_retry(gtod, seq)));
+ return __cvdso_clock_getres(clock, res);
}
+int clock_getres(clockid_t, struct __kernel_timespec *)
+ __attribute__((weak, alias("__vdso_clock_getres")));
-notrace int __vdso_clock_gettime(clockid_t clock, struct timespec *ts)
+#else
+/* i386 only */
+extern int __vdso_clock_gettime(clockid_t clock, struct old_timespec32 *ts);
+extern int __vdso_clock_getres(clockid_t clock, struct old_timespec32 *res);
+
+int __vdso_clock_gettime(clockid_t clock, struct old_timespec32 *ts)
{
- unsigned int msk;
-
- /* Sort out negative (CPU/FD) and invalid clocks */
- if (unlikely((unsigned int) clock >= MAX_CLOCKS))
- return vdso_fallback_gettime(clock, ts);
-
- /*
- * Convert the clockid to a bitmask and use it to check which
- * clocks are handled in the VDSO directly.
- */
- msk = 1U << clock;
- if (likely(msk & VGTOD_HRES)) {
- return do_hres(clock, ts);
- } else if (msk & VGTOD_COARSE) {
- do_coarse(clock, ts);
- return 0;
- }
- return vdso_fallback_gettime(clock, ts);
+ return __cvdso_clock_gettime32(clock, ts);
}
-int clock_gettime(clockid_t, struct timespec *)
+int clock_gettime(clockid_t, struct old_timespec32 *)
__attribute__((weak, alias("__vdso_clock_gettime")));
-notrace int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz)
+int __vdso_clock_gettime64(clockid_t clock, struct __kernel_timespec *ts)
{
- if (likely(tv != NULL)) {
- struct timespec *ts = (struct timespec *) tv;
-
- do_hres(CLOCK_REALTIME, ts);
- tv->tv_usec /= 1000;
- }
- if (unlikely(tz != NULL)) {
- tz->tz_minuteswest = gtod->tz_minuteswest;
- tz->tz_dsttime = gtod->tz_dsttime;
- }
-
- return 0;
+ return __cvdso_clock_gettime(clock, ts);
}
-int gettimeofday(struct timeval *, struct timezone *)
- __attribute__((weak, alias("__vdso_gettimeofday")));
-/*
- * This will break when the xtime seconds get inaccurate, but that is
- * unlikely
- */
-notrace time_t __vdso_time(time_t *t)
-{
- /* This is atomic on x86 so we don't need any locks. */
- time_t result = READ_ONCE(gtod->basetime[CLOCK_REALTIME].sec);
+int clock_gettime64(clockid_t, struct __kernel_timespec *)
+ __attribute__((weak, alias("__vdso_clock_gettime64")));
- if (t)
- *t = result;
- return result;
+int __vdso_clock_getres(clockid_t clock, struct old_timespec32 *res)
+{
+ return __cvdso_clock_getres_time32(clock, res);
}
-time_t time(time_t *t)
- __attribute__((weak, alias("__vdso_time")));
+
+int clock_getres(clockid_t, struct old_timespec32 *)
+ __attribute__((weak, alias("__vdso_clock_getres")));
+#endif
diff --git a/arch/x86/entry/vdso/vdso.lds.S b/arch/x86/entry/vdso/vdso.lds.S
index d3a2dce4cfa9..36b644e16272 100644
--- a/arch/x86/entry/vdso/vdso.lds.S
+++ b/arch/x86/entry/vdso/vdso.lds.S
@@ -25,6 +25,8 @@ VERSION {
__vdso_getcpu;
time;
__vdso_time;
+ clock_getres;
+ __vdso_clock_getres;
local: *;
};
}
diff --git a/arch/x86/entry/vdso/vdso32/vdso32.lds.S b/arch/x86/entry/vdso/vdso32/vdso32.lds.S
index 422764a81d32..c7720995ab1a 100644
--- a/arch/x86/entry/vdso/vdso32/vdso32.lds.S
+++ b/arch/x86/entry/vdso/vdso32/vdso32.lds.S
@@ -26,6 +26,8 @@ VERSION
__vdso_clock_gettime;
__vdso_gettimeofday;
__vdso_time;
+ __vdso_clock_getres;
+ __vdso_clock_gettime64;
};
LINUX_2.5 {
diff --git a/arch/x86/entry/vdso/vdsox32.lds.S b/arch/x86/entry/vdso/vdsox32.lds.S
index 05cd1c5c4a15..16a8050a4fb6 100644
--- a/arch/x86/entry/vdso/vdsox32.lds.S
+++ b/arch/x86/entry/vdso/vdsox32.lds.S
@@ -21,6 +21,7 @@ VERSION {
__vdso_gettimeofday;
__vdso_getcpu;
__vdso_time;
+ __vdso_clock_getres;
local: *;
};
}
diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c
index 8db1f594e8b1..349a61d8bf34 100644
--- a/arch/x86/entry/vdso/vma.c
+++ b/arch/x86/entry/vdso/vma.c
@@ -22,7 +22,7 @@
#include <asm/page.h>
#include <asm/desc.h>
#include <asm/cpufeature.h>
-#include <asm/mshyperv.h>
+#include <clocksource/hyperv_timer.h>
#if defined(CONFIG_X86_64)
unsigned int __read_mostly vdso64_enabled = 1;
diff --git a/arch/x86/entry/vsyscall/Makefile b/arch/x86/entry/vsyscall/Makefile
index 1ac4dd116c26..93c1b3e949a7 100644
--- a/arch/x86/entry/vsyscall/Makefile
+++ b/arch/x86/entry/vsyscall/Makefile
@@ -2,7 +2,5 @@
#
# Makefile for the x86 low level vsyscall code
#
-obj-y := vsyscall_gtod.o
-
obj-$(CONFIG_X86_VSYSCALL_EMULATION) += vsyscall_64.o vsyscall_emu_64.o
diff --git a/arch/x86/entry/vsyscall/vsyscall_gtod.c b/arch/x86/entry/vsyscall/vsyscall_gtod.c
deleted file mode 100644
index cfcdba082feb..000000000000
--- a/arch/x86/entry/vsyscall/vsyscall_gtod.c
+++ /dev/null
@@ -1,83 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2001 Andrea Arcangeli <andrea@suse.de> SuSE
- * Copyright 2003 Andi Kleen, SuSE Labs.
- *
- * Modified for x86 32 bit architecture by
- * Stefani Seibold <stefani@seibold.net>
- * sponsored by Rohde & Schwarz GmbH & Co. KG Munich/Germany
- *
- * Thanks to hpa@transmeta.com for some useful hint.
- * Special thanks to Ingo Molnar for his early experience with
- * a different vsyscall implementation for Linux/IA32 and for the name.
- *
- */
-
-#include <linux/timekeeper_internal.h>
-#include <asm/vgtod.h>
-#include <asm/vvar.h>
-
-int vclocks_used __read_mostly;
-
-DEFINE_VVAR(struct vsyscall_gtod_data, vsyscall_gtod_data);
-
-void update_vsyscall_tz(void)
-{
- vsyscall_gtod_data.tz_minuteswest = sys_tz.tz_minuteswest;
- vsyscall_gtod_data.tz_dsttime = sys_tz.tz_dsttime;
-}
-
-void update_vsyscall(struct timekeeper *tk)
-{
- int vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode;
- struct vsyscall_gtod_data *vdata = &vsyscall_gtod_data;
- struct vgtod_ts *base;
- u64 nsec;
-
- /* Mark the new vclock used. */
- BUILD_BUG_ON(VCLOCK_MAX >= 32);
- WRITE_ONCE(vclocks_used, READ_ONCE(vclocks_used) | (1 << vclock_mode));
-
- gtod_write_begin(vdata);
-
- /* copy vsyscall data */
- vdata->vclock_mode = vclock_mode;
- vdata->cycle_last = tk->tkr_mono.cycle_last;
- vdata->mask = tk->tkr_mono.mask;
- vdata->mult = tk->tkr_mono.mult;
- vdata->shift = tk->tkr_mono.shift;
-
- base = &vdata->basetime[CLOCK_REALTIME];
- base->sec = tk->xtime_sec;
- base->nsec = tk->tkr_mono.xtime_nsec;
-
- base = &vdata->basetime[CLOCK_TAI];
- base->sec = tk->xtime_sec + (s64)tk->tai_offset;
- base->nsec = tk->tkr_mono.xtime_nsec;
-
- base = &vdata->basetime[CLOCK_MONOTONIC];
- base->sec = tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
- nsec = tk->tkr_mono.xtime_nsec;
- nsec += ((u64)tk->wall_to_monotonic.tv_nsec << tk->tkr_mono.shift);
- while (nsec >= (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift)) {
- nsec -= ((u64)NSEC_PER_SEC) << tk->tkr_mono.shift;
- base->sec++;
- }
- base->nsec = nsec;
-
- base = &vdata->basetime[CLOCK_REALTIME_COARSE];
- base->sec = tk->xtime_sec;
- base->nsec = tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift;
-
- base = &vdata->basetime[CLOCK_MONOTONIC_COARSE];
- base->sec = tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
- nsec = tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift;
- nsec += tk->wall_to_monotonic.tv_nsec;
- while (nsec >= NSEC_PER_SEC) {
- nsec -= NSEC_PER_SEC;
- base->sec++;
- }
- base->nsec = nsec;
-
- gtod_write_end(vdata);
-}
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 1608050e9df9..0e033ef11a9f 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -17,64 +17,13 @@
#include <linux/version.h>
#include <linux/vmalloc.h>
#include <linux/mm.h>
-#include <linux/clockchips.h>
#include <linux/hyperv.h>
#include <linux/slab.h>
#include <linux/cpuhotplug.h>
-
-#ifdef CONFIG_HYPERV_TSCPAGE
-
-static struct ms_hyperv_tsc_page *tsc_pg;
-
-struct ms_hyperv_tsc_page *hv_get_tsc_page(void)
-{
- return tsc_pg;
-}
-EXPORT_SYMBOL_GPL(hv_get_tsc_page);
-
-static u64 read_hv_clock_tsc(struct clocksource *arg)
-{
- u64 current_tick = hv_read_tsc_page(tsc_pg);
-
- if (current_tick == U64_MAX)
- rdmsrl(HV_X64_MSR_TIME_REF_COUNT, current_tick);
-
- return current_tick;
-}
-
-static struct clocksource hyperv_cs_tsc = {
- .name = "hyperv_clocksource_tsc_page",
- .rating = 400,
- .read = read_hv_clock_tsc,
- .mask = CLOCKSOURCE_MASK(64),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-#endif
-
-static u64 read_hv_clock_msr(struct clocksource *arg)
-{
- u64 current_tick;
- /*
- * Read the partition counter to get the current tick count. This count
- * is set to 0 when the partition is created and is incremented in
- * 100 nanosecond units.
- */
- rdmsrl(HV_X64_MSR_TIME_REF_COUNT, current_tick);
- return current_tick;
-}
-
-static struct clocksource hyperv_cs_msr = {
- .name = "hyperv_clocksource_msr",
- .rating = 400,
- .read = read_hv_clock_msr,
- .mask = CLOCKSOURCE_MASK(64),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
+#include <clocksource/hyperv_timer.h>
void *hv_hypercall_pg;
EXPORT_SYMBOL_GPL(hv_hypercall_pg);
-struct clocksource *hyperv_cs;
-EXPORT_SYMBOL_GPL(hyperv_cs);
u32 *hv_vp_index;
EXPORT_SYMBOL_GPL(hv_vp_index);
@@ -343,42 +292,8 @@ void __init hyperv_init(void)
x86_init.pci.arch_init = hv_pci_init;
- /*
- * Register Hyper-V specific clocksource.
- */
-#ifdef CONFIG_HYPERV_TSCPAGE
- if (ms_hyperv.features & HV_MSR_REFERENCE_TSC_AVAILABLE) {
- union hv_x64_msr_hypercall_contents tsc_msr;
-
- tsc_pg = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL);
- if (!tsc_pg)
- goto register_msr_cs;
-
- hyperv_cs = &hyperv_cs_tsc;
-
- rdmsrl(HV_X64_MSR_REFERENCE_TSC, tsc_msr.as_uint64);
-
- tsc_msr.enable = 1;
- tsc_msr.guest_physical_address = vmalloc_to_pfn(tsc_pg);
-
- wrmsrl(HV_X64_MSR_REFERENCE_TSC, tsc_msr.as_uint64);
-
- hyperv_cs_tsc.archdata.vclock_mode = VCLOCK_HVCLOCK;
-
- clocksource_register_hz(&hyperv_cs_tsc, NSEC_PER_SEC/100);
- return;
- }
-register_msr_cs:
-#endif
- /*
- * For 32 bit guests just use the MSR based mechanism for reading
- * the partition counter.
- */
-
- hyperv_cs = &hyperv_cs_msr;
- if (ms_hyperv.features & HV_MSR_TIME_REF_COUNT_AVAILABLE)
- clocksource_register_hz(&hyperv_cs_msr, NSEC_PER_SEC/100);
-
+ /* Register Hyper-V specific clocksource */
+ hv_init_clocksource();
return;
remove_cpuhp_state:
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index cdf44aa9a501..af78cd72b8f3 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -401,6 +401,12 @@ enum HV_GENERIC_SET_FORMAT {
#define HV_STATUS_INVALID_CONNECTION_ID 18
#define HV_STATUS_INSUFFICIENT_BUFFERS 19
+/*
+ * The Hyper-V TimeRefCount register and the TSC
+ * page provide a guest VM clock with 100ns tick rate
+ */
+#define HV_CLOCK_HZ (NSEC_PER_SEC/100)
+
typedef struct _HV_REFERENCE_TSC_PAGE {
__u32 tsc_sequence;
__u32 res1;
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index cc60e617931c..f4fa8a9d5d0b 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -105,6 +105,17 @@ static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type)
#define hv_get_crash_ctl(val) \
rdmsrl(HV_X64_MSR_CRASH_CTL, val)
+#define hv_get_time_ref_count(val) \
+ rdmsrl(HV_X64_MSR_TIME_REF_COUNT, val)
+
+#define hv_get_reference_tsc(val) \
+ rdmsrl(HV_X64_MSR_REFERENCE_TSC, val)
+#define hv_set_reference_tsc(val) \
+ wrmsrl(HV_X64_MSR_REFERENCE_TSC, val)
+#define hv_set_clocksource_vdso(val) \
+ ((val).archdata.vclock_mode = VCLOCK_HVCLOCK)
+#define hv_get_raw_timer() rdtsc_ordered()
+
void hyperv_callback_vector(void);
void hyperv_reenlightenment_vector(void);
#ifdef CONFIG_TRACING
@@ -133,7 +144,6 @@ static inline void hv_disable_stimer0_percpu_irq(int irq) {}
#if IS_ENABLED(CONFIG_HYPERV)
-extern struct clocksource *hyperv_cs;
extern void *hv_hypercall_pg;
extern void __percpu **hyperv_pcpu_input_arg;
@@ -387,73 +397,4 @@ static inline int hyperv_flush_guest_mapping_range(u64 as,
}
#endif /* CONFIG_HYPERV */
-#ifdef CONFIG_HYPERV_TSCPAGE
-struct ms_hyperv_tsc_page *hv_get_tsc_page(void);
-static inline u64 hv_read_tsc_page_tsc(const struct ms_hyperv_tsc_page *tsc_pg,
- u64 *cur_tsc)
-{
- u64 scale, offset;
- u32 sequence;
-
- /*
- * The protocol for reading Hyper-V TSC page is specified in Hypervisor
- * Top-Level Functional Specification ver. 3.0 and above. To get the
- * reference time we must do the following:
- * - READ ReferenceTscSequence
- * A special '0' value indicates the time source is unreliable and we
- * need to use something else. The currently published specification
- * versions (up to 4.0b) contain a mistake and wrongly claim '-1'
- * instead of '0' as the special value, see commit c35b82ef0294.
- * - ReferenceTime =
- * ((RDTSC() * ReferenceTscScale) >> 64) + ReferenceTscOffset
- * - READ ReferenceTscSequence again. In case its value has changed
- * since our first reading we need to discard ReferenceTime and repeat
- * the whole sequence as the hypervisor was updating the page in
- * between.
- */
- do {
- sequence = READ_ONCE(tsc_pg->tsc_sequence);
- if (!sequence)
- return U64_MAX;
- /*
- * Make sure we read sequence before we read other values from
- * TSC page.
- */
- smp_rmb();
-
- scale = READ_ONCE(tsc_pg->tsc_scale);
- offset = READ_ONCE(tsc_pg->tsc_offset);
- *cur_tsc = rdtsc_ordered();
-
- /*
- * Make sure we read sequence after we read all other values
- * from TSC page.
- */
- smp_rmb();
-
- } while (READ_ONCE(tsc_pg->tsc_sequence) != sequence);
-
- return mul_u64_u64_shr(*cur_tsc, scale, 64) + offset;
-}
-
-static inline u64 hv_read_tsc_page(const struct ms_hyperv_tsc_page *tsc_pg)
-{
- u64 cur_tsc;
-
- return hv_read_tsc_page_tsc(tsc_pg, &cur_tsc);
-}
-
-#else
-static inline struct ms_hyperv_tsc_page *hv_get_tsc_page(void)
-{
- return NULL;
-}
-
-static inline u64 hv_read_tsc_page_tsc(const struct ms_hyperv_tsc_page *tsc_pg,
- u64 *cur_tsc)
-{
- BUG();
- return U64_MAX;
-}
-#endif
#endif
diff --git a/arch/x86/include/asm/pvclock.h b/arch/x86/include/asm/pvclock.h
index b6033680d458..19b695ff2c68 100644
--- a/arch/x86/include/asm/pvclock.h
+++ b/arch/x86/include/asm/pvclock.h
@@ -2,7 +2,7 @@
#ifndef _ASM_X86_PVCLOCK_H
#define _ASM_X86_PVCLOCK_H
-#include <linux/clocksource.h>
+#include <asm/clocksource.h>
#include <asm/pvclock-abi.h>
/* some helper functions for xen and kvm pv clock sources */
diff --git a/arch/x86/include/asm/vdso/gettimeofday.h b/arch/x86/include/asm/vdso/gettimeofday.h
new file mode 100644
index 000000000000..ae91429129a6
--- /dev/null
+++ b/arch/x86/include/asm/vdso/gettimeofday.h
@@ -0,0 +1,261 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Fast user context implementation of clock_gettime, gettimeofday, and time.
+ *
+ * Copyright (C) 2019 ARM Limited.
+ * Copyright 2006 Andi Kleen, SUSE Labs.
+ * 32 Bit compat layer by Stefani Seibold <stefani@seibold.net>
+ * sponsored by Rohde & Schwarz GmbH & Co. KG Munich/Germany
+ */
+#ifndef __ASM_VDSO_GETTIMEOFDAY_H
+#define __ASM_VDSO_GETTIMEOFDAY_H
+
+#ifndef __ASSEMBLY__
+
+#include <uapi/linux/time.h>
+#include <asm/vgtod.h>
+#include <asm/vvar.h>
+#include <asm/unistd.h>
+#include <asm/msr.h>
+#include <asm/pvclock.h>
+#include <clocksource/hyperv_timer.h>
+
+#define __vdso_data (VVAR(_vdso_data))
+
+#define VDSO_HAS_TIME 1
+
+#define VDSO_HAS_CLOCK_GETRES 1
+
+/*
+ * Declare the memory-mapped vclock data pages. These come from hypervisors.
+ * If we ever reintroduce something like direct access to an MMIO clock like
+ * the HPET again, it will go here as well.
+ *
+ * A load from any of these pages will segfault if the clock in question is
+ * disabled, so appropriate compiler barriers and checks need to be used
+ * to prevent stray loads.
+ *
+ * These declarations MUST NOT be const. The compiler will assume that
+ * an extern const variable has genuinely constant contents, and the
+ * resulting code won't work, since the whole point is that these pages
+ * change over time, possibly while we're accessing them.
+ */
+
+#ifdef CONFIG_PARAVIRT_CLOCK
+/*
+ * This is the vCPU 0 pvclock page. We only use pvclock from the vDSO
+ * if the hypervisor tells us that all vCPUs can get valid data from the
+ * vCPU 0 page.
+ */
+extern struct pvclock_vsyscall_time_info pvclock_page
+ __attribute__((visibility("hidden")));
+#endif
+
+#ifdef CONFIG_HYPERV_TSCPAGE
+extern struct ms_hyperv_tsc_page hvclock_page
+ __attribute__((visibility("hidden")));
+#endif
+
+#ifndef BUILD_VDSO32
+
+static __always_inline
+long clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ long ret;
+
+ asm ("syscall" : "=a" (ret), "=m" (*_ts) :
+ "0" (__NR_clock_gettime), "D" (_clkid), "S" (_ts) :
+ "rcx", "r11");
+
+ return ret;
+}
+
+static __always_inline
+long gettimeofday_fallback(struct __kernel_old_timeval *_tv,
+ struct timezone *_tz)
+{
+ long ret;
+
+ asm("syscall" : "=a" (ret) :
+ "0" (__NR_gettimeofday), "D" (_tv), "S" (_tz) : "memory");
+
+ return ret;
+}
+
+static __always_inline
+long clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ long ret;
+
+ asm ("syscall" : "=a" (ret), "=m" (*_ts) :
+ "0" (__NR_clock_getres), "D" (_clkid), "S" (_ts) :
+ "rcx", "r11");
+
+ return ret;
+}
+
+#else
+
+static __always_inline
+long clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ long ret;
+
+ asm (
+ "mov %%ebx, %%edx \n"
+ "mov %[clock], %%ebx \n"
+ "call __kernel_vsyscall \n"
+ "mov %%edx, %%ebx \n"
+ : "=a" (ret), "=m" (*_ts)
+ : "0" (__NR_clock_gettime64), [clock] "g" (_clkid), "c" (_ts)
+ : "edx");
+
+ return ret;
+}
+
+static __always_inline
+long gettimeofday_fallback(struct __kernel_old_timeval *_tv,
+ struct timezone *_tz)
+{
+ long ret;
+
+ asm(
+ "mov %%ebx, %%edx \n"
+ "mov %2, %%ebx \n"
+ "call __kernel_vsyscall \n"
+ "mov %%edx, %%ebx \n"
+ : "=a" (ret)
+ : "0" (__NR_gettimeofday), "g" (_tv), "c" (_tz)
+ : "memory", "edx");
+
+ return ret;
+}
+
+static __always_inline long
+clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ long ret;
+
+ asm (
+ "mov %%ebx, %%edx \n"
+ "mov %[clock], %%ebx \n"
+ "call __kernel_vsyscall \n"
+ "mov %%edx, %%ebx \n"
+ : "=a" (ret), "=m" (*_ts)
+ : "0" (__NR_clock_getres_time64), [clock] "g" (_clkid), "c" (_ts)
+ : "edx");
+
+ return ret;
+}
+
+#endif
+
+#ifdef CONFIG_PARAVIRT_CLOCK
+static u64 vread_pvclock(void)
+{
+ const struct pvclock_vcpu_time_info *pvti = &pvclock_page.pvti;
+ u32 version;
+ u64 ret;
+
+ /*
+ * Note: The kernel and hypervisor must guarantee that cpu ID
+ * number maps 1:1 to per-CPU pvclock time info.
+ *
+ * Because the hypervisor is entirely unaware of guest userspace
+ * preemption, it cannot guarantee that per-CPU pvclock time
+ * info is updated if the underlying CPU changes or that that
+ * version is increased whenever underlying CPU changes.
+ *
+ * On KVM, we are guaranteed that pvti updates for any vCPU are
+ * atomic as seen by *all* vCPUs. This is an even stronger
+ * guarantee than we get with a normal seqlock.
+ *
+ * On Xen, we don't appear to have that guarantee, but Xen still
+ * supplies a valid seqlock using the version field.
+ *
+ * We only do pvclock vdso timing at all if
+ * PVCLOCK_TSC_STABLE_BIT is set, and we interpret that bit to
+ * mean that all vCPUs have matching pvti and that the TSC is
+ * synced, so we can just look at vCPU 0's pvti.
+ */
+
+ do {
+ version = pvclock_read_begin(pvti);
+
+ if (unlikely(!(pvti->flags & PVCLOCK_TSC_STABLE_BIT)))
+ return U64_MAX;
+
+ ret = __pvclock_read_cycles(pvti, rdtsc_ordered());
+ } while (pvclock_read_retry(pvti, version));
+
+ return ret;
+}
+#endif
+
+#ifdef CONFIG_HYPERV_TSCPAGE
+static u64 vread_hvclock(void)
+{
+ return hv_read_tsc_page(&hvclock_page);
+}
+#endif
+
+static inline u64 __arch_get_hw_counter(s32 clock_mode)
+{
+ if (clock_mode == VCLOCK_TSC)
+ return (u64)rdtsc_ordered();
+ /*
+ * For any memory-mapped vclock type, we need to make sure that gcc
+ * doesn't cleverly hoist a load before the mode check. Otherwise we
+ * might end up touching the memory-mapped page even if the vclock in
+ * question isn't enabled, which will segfault. Hence the barriers.
+ */
+#ifdef CONFIG_PARAVIRT_CLOCK
+ if (clock_mode == VCLOCK_PVCLOCK) {
+ barrier();
+ return vread_pvclock();
+ }
+#endif
+#ifdef CONFIG_HYPERV_TSCPAGE
+ if (clock_mode == VCLOCK_HVCLOCK) {
+ barrier();
+ return vread_hvclock();
+ }
+#endif
+ return U64_MAX;
+}
+
+static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
+{
+ return __vdso_data;
+}
+
+/*
+ * x86 specific delta calculation.
+ *
+ * The regular implementation assumes that clocksource reads are globally
+ * monotonic. The TSC can be slightly off across sockets which can cause
+ * the regular delta calculation (@cycles - @last) to return a huge time
+ * jump.
+ *
+ * Therefore it needs to be verified that @cycles are greater than
+ * @last. If not then use @last, which is the base time of the current
+ * conversion period.
+ *
+ * This variant also removes the masking of the subtraction because the
+ * clocksource mask of all VDSO capable clocksources on x86 is U64_MAX
+ * which would result in a pointless operation. The compiler cannot
+ * optimize it away as the mask comes from the vdso data and is not compile
+ * time constant.
+ */
+static __always_inline
+u64 vdso_calc_delta(u64 cycles, u64 last, u64 mask, u32 mult)
+{
+ if (cycles > last)
+ return (cycles - last) * mult;
+ return 0;
+}
+#define vdso_calc_delta vdso_calc_delta
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_VDSO_GETTIMEOFDAY_H */
diff --git a/arch/x86/include/asm/vdso/vsyscall.h b/arch/x86/include/asm/vdso/vsyscall.h
new file mode 100644
index 000000000000..0026ab2123ce
--- /dev/null
+++ b/arch/x86/include/asm/vdso/vsyscall.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_VDSO_VSYSCALL_H
+#define __ASM_VDSO_VSYSCALL_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/hrtimer.h>
+#include <linux/timekeeper_internal.h>
+#include <vdso/datapage.h>
+#include <asm/vgtod.h>
+#include <asm/vvar.h>
+
+int vclocks_used __read_mostly;
+
+DEFINE_VVAR(struct vdso_data, _vdso_data);
+/*
+ * Update the vDSO data page to keep in sync with kernel timekeeping.
+ */
+static __always_inline
+struct vdso_data *__x86_get_k_vdso_data(void)
+{
+ return _vdso_data;
+}
+#define __arch_get_k_vdso_data __x86_get_k_vdso_data
+
+static __always_inline
+int __x86_get_clock_mode(struct timekeeper *tk)
+{
+ int vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode;
+
+ /* Mark the new vclock used. */
+ BUILD_BUG_ON(VCLOCK_MAX >= 32);
+ WRITE_ONCE(vclocks_used, READ_ONCE(vclocks_used) | (1 << vclock_mode));
+
+ return vclock_mode;
+}
+#define __arch_get_clock_mode __x86_get_clock_mode
+
+/* The asm-generic header needs to be included after the definitions above */
+#include <asm-generic/vdso/vsyscall.h>
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_VDSO_VSYSCALL_H */
diff --git a/arch/x86/include/asm/vgtod.h b/arch/x86/include/asm/vgtod.h
index 913a133f8e6f..a2638c6124ed 100644
--- a/arch/x86/include/asm/vgtod.h
+++ b/arch/x86/include/asm/vgtod.h
@@ -3,7 +3,9 @@
#define _ASM_X86_VGTOD_H
#include <linux/compiler.h>
-#include <linux/clocksource.h>
+#include <asm/clocksource.h>
+#include <vdso/datapage.h>
+#include <vdso/helpers.h>
#include <uapi/linux/time.h>
@@ -13,81 +15,10 @@ typedef u64 gtod_long_t;
typedef unsigned long gtod_long_t;
#endif
-/*
- * There is one of these objects in the vvar page for each
- * vDSO-accelerated clockid. For high-resolution clocks, this encodes
- * the time corresponding to vsyscall_gtod_data.cycle_last. For coarse
- * clocks, this encodes the actual time.
- *
- * To confuse the reader, for high-resolution clocks, nsec is left-shifted
- * by vsyscall_gtod_data.shift.
- */
-struct vgtod_ts {
- u64 sec;
- u64 nsec;
-};
-
-#define VGTOD_BASES (CLOCK_TAI + 1)
-#define VGTOD_HRES (BIT(CLOCK_REALTIME) | BIT(CLOCK_MONOTONIC) | BIT(CLOCK_TAI))
-#define VGTOD_COARSE (BIT(CLOCK_REALTIME_COARSE) | BIT(CLOCK_MONOTONIC_COARSE))
-
-/*
- * vsyscall_gtod_data will be accessed by 32 and 64 bit code at the same time
- * so be carefull by modifying this structure.
- */
-struct vsyscall_gtod_data {
- unsigned int seq;
-
- int vclock_mode;
- u64 cycle_last;
- u64 mask;
- u32 mult;
- u32 shift;
-
- struct vgtod_ts basetime[VGTOD_BASES];
-
- int tz_minuteswest;
- int tz_dsttime;
-};
-extern struct vsyscall_gtod_data vsyscall_gtod_data;
-
extern int vclocks_used;
static inline bool vclock_was_used(int vclock)
{
return READ_ONCE(vclocks_used) & (1 << vclock);
}
-static inline unsigned int gtod_read_begin(const struct vsyscall_gtod_data *s)
-{
- unsigned int ret;
-
-repeat:
- ret = READ_ONCE(s->seq);
- if (unlikely(ret & 1)) {
- cpu_relax();
- goto repeat;
- }
- smp_rmb();
- return ret;
-}
-
-static inline int gtod_read_retry(const struct vsyscall_gtod_data *s,
- unsigned int start)
-{
- smp_rmb();
- return unlikely(s->seq != start);
-}
-
-static inline void gtod_write_begin(struct vsyscall_gtod_data *s)
-{
- ++s->seq;
- smp_wmb();
-}
-
-static inline void gtod_write_end(struct vsyscall_gtod_data *s)
-{
- smp_wmb();
- ++s->seq;
-}
-
#endif /* _ASM_X86_VGTOD_H */
diff --git a/arch/x86/include/asm/vvar.h b/arch/x86/include/asm/vvar.h
index e474f5c6e387..32f5d9a0b90e 100644
--- a/arch/x86/include/asm/vvar.h
+++ b/arch/x86/include/asm/vvar.h
@@ -32,19 +32,20 @@
extern char __vvar_page;
#define DECLARE_VVAR(offset, type, name) \
- extern type vvar_ ## name __attribute__((visibility("hidden")));
+ extern type vvar_ ## name[CS_BASES] \
+ __attribute__((visibility("hidden")));
#define VVAR(name) (vvar_ ## name)
#define DEFINE_VVAR(type, name) \
- type name \
+ type name[CS_BASES] \
__attribute__((section(".vvar_" #name), aligned(16))) __visible
#endif
/* DECLARE_VVAR(offset, type, name) */
-DECLARE_VVAR(128, struct vsyscall_gtod_data, vsyscall_gtod_data)
+DECLARE_VVAR(128, struct vdso_data, _vdso_data)
#undef DECLARE_VVAR
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 7df29f08871b..1e5f7a03ddf5 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -17,6 +17,7 @@
#include <linux/irq.h>
#include <linux/kexec.h>
#include <linux/i8253.h>
+#include <linux/random.h>
#include <asm/processor.h>
#include <asm/hypervisor.h>
#include <asm/hyperv-tlfs.h>
@@ -80,6 +81,7 @@ __visible void __irq_entry hv_stimer0_vector_handler(struct pt_regs *regs)
inc_irq_stat(hyperv_stimer0_count);
if (hv_stimer0_handler)
hv_stimer0_handler();
+ add_interrupt_randomness(HYPERV_STIMER0_VECTOR, 0);
ack_APIC_irq();
exiting_irq();
@@ -89,7 +91,7 @@ __visible void __irq_entry hv_stimer0_vector_handler(struct pt_regs *regs)
int hv_setup_stimer0_irq(int *irq, int *vector, void (*handler)(void))
{
*vector = HYPERV_STIMER0_VECTOR;
- *irq = 0; /* Unused on x86/x64 */
+ *irq = -1; /* Unused on x86/x64 */
hv_stimer0_handler = handler;
return 0;
}
diff --git a/arch/x86/kernel/pvclock.c b/arch/x86/kernel/pvclock.c
index 0ff3e294d0e5..10125358b9c4 100644
--- a/arch/x86/kernel/pvclock.c
+++ b/arch/x86/kernel/pvclock.c
@@ -3,6 +3,7 @@
*/
+#include <linux/clocksource.h>
#include <linux/kernel.h>
#include <linux/percpu.h>
#include <linux/notifier.h>
diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index 132d149494d6..ab73a9a639ae 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -261,10 +261,10 @@ static int kvm_pmu_rdpmc_vmware(struct kvm_vcpu *vcpu, unsigned idx, u64 *data)
ctr_val = rdtsc();
break;
case VMWARE_BACKDOOR_PMC_REAL_TIME:
- ctr_val = ktime_get_boot_ns();
+ ctr_val = ktime_get_boottime_ns();
break;
case VMWARE_BACKDOOR_PMC_APPARENT_TIME:
- ctr_val = ktime_get_boot_ns() +
+ ctr_val = ktime_get_boottime_ns() +
vcpu->kvm->arch.kvmclock_offset;
break;
default:
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index fafd81d2c9ea..63bb1ee8258e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -67,6 +67,7 @@
#include <asm/mshyperv.h>
#include <asm/hypervisor.h>
#include <asm/intel_pt.h>
+#include <clocksource/hyperv_timer.h>
#define CREATE_TRACE_POINTS
#include "trace.h"
@@ -1728,7 +1729,7 @@ void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr)
raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags);
offset = kvm_compute_tsc_offset(vcpu, data);
- ns = ktime_get_boot_ns();
+ ns = ktime_get_boottime_ns();
elapsed = ns - kvm->arch.last_tsc_nsec;
if (vcpu->arch.virtual_tsc_khz) {
@@ -2070,7 +2071,7 @@ u64 get_kvmclock_ns(struct kvm *kvm)
spin_lock(&ka->pvclock_gtod_sync_lock);
if (!ka->use_master_clock) {
spin_unlock(&ka->pvclock_gtod_sync_lock);
- return ktime_get_boot_ns() + ka->kvmclock_offset;
+ return ktime_get_boottime_ns() + ka->kvmclock_offset;
}
hv_clock.tsc_timestamp = ka->master_cycle_now;
@@ -2086,7 +2087,7 @@ u64 get_kvmclock_ns(struct kvm *kvm)
&hv_clock.tsc_to_system_mul);
ret = __pvclock_read_cycles(&hv_clock, rdtsc());
} else
- ret = ktime_get_boot_ns() + ka->kvmclock_offset;
+ ret = ktime_get_boottime_ns() + ka->kvmclock_offset;
put_cpu();
@@ -2185,7 +2186,7 @@ static int kvm_guest_time_update(struct kvm_vcpu *v)
}
if (!use_master_clock) {
host_tsc = rdtsc();
- kernel_ns = ktime_get_boot_ns();
+ kernel_ns = ktime_get_boottime_ns();
}
tsc_timestamp = kvm_read_l1_tsc(v, host_tsc);
@@ -9015,7 +9016,7 @@ int kvm_arch_hardware_enable(void)
* before any KVM threads can be running. Unfortunately, we can't
* bring the TSCs fully up to date with real time, as we aren't yet far
* enough into CPU bringup that we know how much real time has actually
- * elapsed; our helper function, ktime_get_boot_ns() will be using boot
+ * elapsed; our helper function, ktime_get_boottime_ns() will be using boot
* variables that haven't been updated yet.
*
* So we simply find the maximum observed TSC above, then record the
@@ -9243,7 +9244,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
mutex_init(&kvm->arch.apic_map_lock);
spin_lock_init(&kvm->arch.pvclock_gtod_sync_lock);
- kvm->arch.kvmclock_offset = -ktime_get_boot_ns();
+ kvm->arch.kvmclock_offset = -ktime_get_boottime_ns();
pvclock_update_vm_gtod_copy(kvm);
kvm->arch.guest_can_read_msr_platform_info = true;
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 3300739edce4..5e9317dc3d39 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -43,6 +43,11 @@ config BCM_KONA_TIMER
help
Enables the support for the BCM Kona mobile timer driver.
+config DAVINCI_TIMER
+ bool "Texas Instruments DaVinci timer driver" if COMPILE_TEST
+ help
+ Enables the support for the TI DaVinci timer driver.
+
config DIGICOLOR_TIMER
bool "Digicolor timer driver" if COMPILE_TEST
select CLKSRC_MMIO
@@ -140,7 +145,7 @@ config TEGRA_TIMER
bool "Tegra timer driver" if COMPILE_TEST
select CLKSRC_MMIO
select TIMER_OF
- depends on ARM || ARM64
+ depends on ARCH_TEGRA || COMPILE_TEST
help
Enables support for the Tegra driver.
@@ -617,6 +622,13 @@ config CLKSRC_IMX_TPM
Enable this option to use IMX Timer/PWM Module (TPM) timer as
clocksource.
+config TIMER_IMX_SYS_CTR
+ bool "i.MX system counter timer" if COMPILE_TEST
+ select TIMER_OF
+ help
+ Enable this option to use i.MX system counter timer as a
+ clockevent.
+
config CLKSRC_ST_LPC
bool "Low power clocksource found in the LPC" if COMPILE_TEST
select TIMER_OF if OF
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 236858fa7fbf..2e7936e7833f 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_SH_TIMER_TMU) += sh_tmu.o
obj-$(CONFIG_EM_TIMER_STI) += em_sti.o
obj-$(CONFIG_CLKBLD_I8253) += i8253.o
obj-$(CONFIG_CLKSRC_MMIO) += mmio.o
+obj-$(CONFIG_DAVINCI_TIMER) += timer-davinci.o
obj-$(CONFIG_DIGICOLOR_TIMER) += timer-digicolor.o
obj-$(CONFIG_OMAP_DM_TIMER) += timer-ti-dm.o
obj-$(CONFIG_DW_APB_TIMER) += dw_apb_timer.o
@@ -36,7 +37,7 @@ obj-$(CONFIG_U300_TIMER) += timer-u300.o
obj-$(CONFIG_SUN4I_TIMER) += timer-sun4i.o
obj-$(CONFIG_SUN5I_HSTIMER) += timer-sun5i.o
obj-$(CONFIG_MESON6_TIMER) += timer-meson6.o
-obj-$(CONFIG_TEGRA_TIMER) += timer-tegra20.o
+obj-$(CONFIG_TEGRA_TIMER) += timer-tegra.o
obj-$(CONFIG_VT8500_TIMER) += timer-vt8500.o
obj-$(CONFIG_NSPIRE_TIMER) += timer-zevio.o
obj-$(CONFIG_BCM_KONA_TIMER) += bcm_kona_timer.o
@@ -74,6 +75,7 @@ obj-$(CONFIG_CLKSRC_MIPS_GIC) += mips-gic-timer.o
obj-$(CONFIG_CLKSRC_TANGO_XTAL) += timer-tango-xtal.o
obj-$(CONFIG_CLKSRC_IMX_GPT) += timer-imx-gpt.o
obj-$(CONFIG_CLKSRC_IMX_TPM) += timer-imx-tpm.o
+obj-$(CONFIG_TIMER_IMX_SYS_CTR) += timer-imx-sysctr.o
obj-$(CONFIG_ASM9260_TIMER) += asm9260_timer.o
obj-$(CONFIG_H8300_TMR8) += h8300_timer8.o
obj-$(CONFIG_H8300_TMR16) += h8300_timer16.o
@@ -84,3 +86,4 @@ obj-$(CONFIG_ATCPIT100_TIMER) += timer-atcpit100.o
obj-$(CONFIG_RISCV_TIMER) += timer-riscv.o
obj-$(CONFIG_CSKY_MP_TIMER) += timer-mp-csky.o
obj-$(CONFIG_GX6605S_TIMER) += timer-gx6605s.o
+obj-$(CONFIG_HYPERV_TIMER) += hyperv_timer.o
diff --git a/drivers/clocksource/arc_timer.c b/drivers/clocksource/arc_timer.c
index ebfbccefc7b3..b29b5a75333e 100644
--- a/drivers/clocksource/arc_timer.c
+++ b/drivers/clocksource/arc_timer.c
@@ -13,6 +13,7 @@
*/
#include <linux/interrupt.h>
+#include <linux/bits.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clocksource.h>
@@ -139,7 +140,7 @@ static u64 arc_read_rtc(struct clocksource *cs)
l = read_aux_reg(AUX_RTC_LOW);
h = read_aux_reg(AUX_RTC_HIGH);
status = read_aux_reg(AUX_RTC_CTRL);
- } while (!(status & _BITUL(31)));
+ } while (!(status & BIT(31)));
return (((u64)h) << 32) | l;
}
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 07e57a49d1e8..9a5464c625b4 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -801,14 +801,7 @@ static void arch_timer_evtstrm_enable(int divider)
cntkctl |= (divider << ARCH_TIMER_EVT_TRIGGER_SHIFT)
| ARCH_TIMER_VIRT_EVT_EN;
arch_timer_set_cntkctl(cntkctl);
-#ifdef CONFIG_ARM64
- cpu_set_named_feature(EVTSTRM);
-#else
- elf_hwcap |= HWCAP_EVTSTRM;
-#endif
-#ifdef CONFIG_COMPAT
- compat_elf_hwcap |= COMPAT_HWCAP_EVTSTRM;
-#endif
+ arch_timer_set_evtstrm_feature();
cpumask_set_cpu(smp_processor_id(), &evtstrm_available);
}
@@ -1037,11 +1030,7 @@ static int arch_timer_cpu_pm_notify(struct notifier_block *self,
} else if (action == CPU_PM_ENTER_FAILED || action == CPU_PM_EXIT) {
arch_timer_set_cntkctl(__this_cpu_read(saved_cntkctl));
-#ifdef CONFIG_ARM64
- if (cpu_have_named_feature(EVTSTRM))
-#else
- if (elf_hwcap & HWCAP_EVTSTRM)
-#endif
+ if (arch_timer_have_evtstrm_feature())
cpumask_set_cpu(smp_processor_id(), &evtstrm_available);
}
return NOTIFY_OK;
diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index e8eab16b154b..74cb299f5089 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -206,7 +206,7 @@ static void exynos4_frc_resume(struct clocksource *cs)
static struct clocksource mct_frc = {
.name = "mct-frc",
- .rating = 400,
+ .rating = 450, /* use value higher than ARM arch timer */
.read = exynos4_frc_read,
.mask = CLOCKSOURCE_MASK(32),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
@@ -461,7 +461,7 @@ static int exynos4_mct_starting_cpu(unsigned int cpu)
evt->set_state_oneshot_stopped = set_state_shutdown;
evt->tick_resume = set_state_shutdown;
evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
- evt->rating = 450;
+ evt->rating = 500; /* use value higher than ARM arch timer */
exynos4_mct_write(TICK_BASE_CNT, mevt->base + MCT_L_TCNTB_OFFSET);
diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c
new file mode 100644
index 000000000000..ba2c79e6a0ee
--- /dev/null
+++ b/drivers/clocksource/hyperv_timer.c
@@ -0,0 +1,339 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Clocksource driver for the synthetic counter and timers
+ * provided by the Hyper-V hypervisor to guest VMs, as described
+ * in the Hyper-V Top Level Functional Spec (TLFS). This driver
+ * is instruction set architecture independent.
+ *
+ * Copyright (C) 2019, Microsoft, Inc.
+ *
+ * Author: Michael Kelley <mikelley@microsoft.com>
+ */
+
+#include <linux/percpu.h>
+#include <linux/cpumask.h>
+#include <linux/clockchips.h>
+#include <linux/clocksource.h>
+#include <linux/sched_clock.h>
+#include <linux/mm.h>
+#include <clocksource/hyperv_timer.h>
+#include <asm/hyperv-tlfs.h>
+#include <asm/mshyperv.h>
+
+static struct clock_event_device __percpu *hv_clock_event;
+
+/*
+ * If false, we're using the old mechanism for stimer0 interrupts
+ * where it sends a VMbus message when it expires. The old
+ * mechanism is used when running on older versions of Hyper-V
+ * that don't support Direct Mode. While Hyper-V provides
+ * four stimer's per CPU, Linux uses only stimer0.
+ */
+static bool direct_mode_enabled;
+
+static int stimer0_irq;
+static int stimer0_vector;
+static int stimer0_message_sint;
+
+/*
+ * ISR for when stimer0 is operating in Direct Mode. Direct Mode
+ * does not use VMbus or any VMbus messages, so process here and not
+ * in the VMbus driver code.
+ */
+void hv_stimer0_isr(void)
+{
+ struct clock_event_device *ce;
+
+ ce = this_cpu_ptr(hv_clock_event);
+ ce->event_handler(ce);
+}
+EXPORT_SYMBOL_GPL(hv_stimer0_isr);
+
+static int hv_ce_set_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ u64 current_tick;
+
+ current_tick = hyperv_cs->read(NULL);
+ current_tick += delta;
+ hv_init_timer(0, current_tick);
+ return 0;
+}
+
+static int hv_ce_shutdown(struct clock_event_device *evt)
+{
+ hv_init_timer(0, 0);
+ hv_init_timer_config(0, 0);
+ if (direct_mode_enabled)
+ hv_disable_stimer0_percpu_irq(stimer0_irq);
+
+ return 0;
+}
+
+static int hv_ce_set_oneshot(struct clock_event_device *evt)
+{
+ union hv_stimer_config timer_cfg;
+
+ timer_cfg.as_uint64 = 0;
+ timer_cfg.enable = 1;
+ timer_cfg.auto_enable = 1;
+ if (direct_mode_enabled) {
+ /*
+ * When it expires, the timer will directly interrupt
+ * on the specified hardware vector/IRQ.
+ */
+ timer_cfg.direct_mode = 1;
+ timer_cfg.apic_vector = stimer0_vector;
+ hv_enable_stimer0_percpu_irq(stimer0_irq);
+ } else {
+ /*
+ * When it expires, the timer will generate a VMbus message,
+ * to be handled by the normal VMbus interrupt handler.
+ */
+ timer_cfg.direct_mode = 0;
+ timer_cfg.sintx = stimer0_message_sint;
+ }
+ hv_init_timer_config(0, timer_cfg.as_uint64);
+ return 0;
+}
+
+/*
+ * hv_stimer_init - Per-cpu initialization of the clockevent
+ */
+void hv_stimer_init(unsigned int cpu)
+{
+ struct clock_event_device *ce;
+
+ /*
+ * Synthetic timers are always available except on old versions of
+ * Hyper-V on x86. In that case, just return as Linux will use a
+ * clocksource based on emulated PIT or LAPIC timer hardware.
+ */
+ if (!(ms_hyperv.features & HV_MSR_SYNTIMER_AVAILABLE))
+ return;
+
+ ce = per_cpu_ptr(hv_clock_event, cpu);
+ ce->name = "Hyper-V clockevent";
+ ce->features = CLOCK_EVT_FEAT_ONESHOT;
+ ce->cpumask = cpumask_of(cpu);
+ ce->rating = 1000;
+ ce->set_state_shutdown = hv_ce_shutdown;
+ ce->set_state_oneshot = hv_ce_set_oneshot;
+ ce->set_next_event = hv_ce_set_next_event;
+
+ clockevents_config_and_register(ce,
+ HV_CLOCK_HZ,
+ HV_MIN_DELTA_TICKS,
+ HV_MAX_MAX_DELTA_TICKS);
+}
+EXPORT_SYMBOL_GPL(hv_stimer_init);
+
+/*
+ * hv_stimer_cleanup - Per-cpu cleanup of the clockevent
+ */
+void hv_stimer_cleanup(unsigned int cpu)
+{
+ struct clock_event_device *ce;
+
+ /* Turn off clockevent device */
+ if (ms_hyperv.features & HV_MSR_SYNTIMER_AVAILABLE) {
+ ce = per_cpu_ptr(hv_clock_event, cpu);
+ hv_ce_shutdown(ce);
+ }
+}
+EXPORT_SYMBOL_GPL(hv_stimer_cleanup);
+
+/* hv_stimer_alloc - Global initialization of the clockevent and stimer0 */
+int hv_stimer_alloc(int sint)
+{
+ int ret;
+
+ hv_clock_event = alloc_percpu(struct clock_event_device);
+ if (!hv_clock_event)
+ return -ENOMEM;
+
+ direct_mode_enabled = ms_hyperv.misc_features &
+ HV_STIMER_DIRECT_MODE_AVAILABLE;
+ if (direct_mode_enabled) {
+ ret = hv_setup_stimer0_irq(&stimer0_irq, &stimer0_vector,
+ hv_stimer0_isr);
+ if (ret) {
+ free_percpu(hv_clock_event);
+ hv_clock_event = NULL;
+ return ret;
+ }
+ }
+
+ stimer0_message_sint = sint;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(hv_stimer_alloc);
+
+/* hv_stimer_free - Free global resources allocated by hv_stimer_alloc() */
+void hv_stimer_free(void)
+{
+ if (direct_mode_enabled && (stimer0_irq != 0)) {
+ hv_remove_stimer0_irq(stimer0_irq);
+ stimer0_irq = 0;
+ }
+ free_percpu(hv_clock_event);
+ hv_clock_event = NULL;
+}
+EXPORT_SYMBOL_GPL(hv_stimer_free);
+
+/*
+ * Do a global cleanup of clockevents for the cases of kexec and
+ * vmbus exit
+ */
+void hv_stimer_global_cleanup(void)
+{
+ int cpu;
+ struct clock_event_device *ce;
+
+ if (ms_hyperv.features & HV_MSR_SYNTIMER_AVAILABLE) {
+ for_each_present_cpu(cpu) {
+ ce = per_cpu_ptr(hv_clock_event, cpu);
+ clockevents_unbind_device(ce, cpu);
+ }
+ }
+ hv_stimer_free();
+}
+EXPORT_SYMBOL_GPL(hv_stimer_global_cleanup);
+
+/*
+ * Code and definitions for the Hyper-V clocksources. Two
+ * clocksources are defined: one that reads the Hyper-V defined MSR, and
+ * the other that uses the TSC reference page feature as defined in the
+ * TLFS. The MSR version is for compatibility with old versions of
+ * Hyper-V and 32-bit x86. The TSC reference page version is preferred.
+ */
+
+struct clocksource *hyperv_cs;
+EXPORT_SYMBOL_GPL(hyperv_cs);
+
+#ifdef CONFIG_HYPERV_TSCPAGE
+
+static struct ms_hyperv_tsc_page *tsc_pg;
+
+struct ms_hyperv_tsc_page *hv_get_tsc_page(void)
+{
+ return tsc_pg;
+}
+EXPORT_SYMBOL_GPL(hv_get_tsc_page);
+
+static u64 notrace read_hv_sched_clock_tsc(void)
+{
+ u64 current_tick = hv_read_tsc_page(tsc_pg);
+
+ if (current_tick == U64_MAX)
+ hv_get_time_ref_count(current_tick);
+
+ return current_tick;
+}
+
+static u64 read_hv_clock_tsc(struct clocksource *arg)
+{
+ return read_hv_sched_clock_tsc();
+}
+
+static struct clocksource hyperv_cs_tsc = {
+ .name = "hyperv_clocksource_tsc_page",
+ .rating = 400,
+ .read = read_hv_clock_tsc,
+ .mask = CLOCKSOURCE_MASK(64),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+#endif
+
+static u64 notrace read_hv_sched_clock_msr(void)
+{
+ u64 current_tick;
+ /*
+ * Read the partition counter to get the current tick count. This count
+ * is set to 0 when the partition is created and is incremented in
+ * 100 nanosecond units.
+ */
+ hv_get_time_ref_count(current_tick);
+ return current_tick;
+}
+
+static u64 read_hv_clock_msr(struct clocksource *arg)
+{
+ return read_hv_sched_clock_msr();
+}
+
+static struct clocksource hyperv_cs_msr = {
+ .name = "hyperv_clocksource_msr",
+ .rating = 400,
+ .read = read_hv_clock_msr,
+ .mask = CLOCKSOURCE_MASK(64),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+#ifdef CONFIG_HYPERV_TSCPAGE
+static bool __init hv_init_tsc_clocksource(void)
+{
+ u64 tsc_msr;
+ phys_addr_t phys_addr;
+
+ if (!(ms_hyperv.features & HV_MSR_REFERENCE_TSC_AVAILABLE))
+ return false;
+
+ tsc_pg = vmalloc(PAGE_SIZE);
+ if (!tsc_pg)
+ return false;
+
+ hyperv_cs = &hyperv_cs_tsc;
+ phys_addr = page_to_phys(vmalloc_to_page(tsc_pg));
+
+ /*
+ * The Hyper-V TLFS specifies to preserve the value of reserved
+ * bits in registers. So read the existing value, preserve the
+ * low order 12 bits, and add in the guest physical address
+ * (which already has at least the low 12 bits set to zero since
+ * it is page aligned). Also set the "enable" bit, which is bit 0.
+ */
+ hv_get_reference_tsc(tsc_msr);
+ tsc_msr &= GENMASK_ULL(11, 0);
+ tsc_msr = tsc_msr | 0x1 | (u64)phys_addr;
+ hv_set_reference_tsc(tsc_msr);
+
+ hv_set_clocksource_vdso(hyperv_cs_tsc);
+ clocksource_register_hz(&hyperv_cs_tsc, NSEC_PER_SEC/100);
+
+ /* sched_clock_register is needed on ARM64 but is a no-op on x86 */
+ sched_clock_register(read_hv_sched_clock_tsc, 64, HV_CLOCK_HZ);
+ return true;
+}
+#else
+static bool __init hv_init_tsc_clocksource(void)
+{
+ return false;
+}
+#endif
+
+
+void __init hv_init_clocksource(void)
+{
+ /*
+ * Try to set up the TSC page clocksource. If it succeeds, we're
+ * done. Otherwise, set up the MSR clocksoruce. At least one of
+ * these will always be available except on very old versions of
+ * Hyper-V on x86. In that case we won't have a Hyper-V
+ * clocksource, but Linux will still run with a clocksource based
+ * on the emulated PIT or LAPIC timer.
+ */
+ if (hv_init_tsc_clocksource())
+ return;
+
+ if (!(ms_hyperv.features & HV_MSR_TIME_REF_COUNT_AVAILABLE))
+ return;
+
+ hyperv_cs = &hyperv_cs_msr;
+ clocksource_register_hz(&hyperv_cs_msr, NSEC_PER_SEC/100);
+
+ /* sched_clock_register is needed on ARM64 but is a no-op on x86 */
+ sched_clock_register(read_hv_sched_clock_msr, 64, HV_CLOCK_HZ);
+}
+EXPORT_SYMBOL_GPL(hv_init_clocksource);
diff --git a/drivers/clocksource/timer-davinci.c b/drivers/clocksource/timer-davinci.c
new file mode 100644
index 000000000000..62745c962049
--- /dev/null
+++ b/drivers/clocksource/timer-davinci.c
@@ -0,0 +1,369 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI DaVinci clocksource driver
+ *
+ * Copyright (C) 2019 Texas Instruments
+ * Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+ * (with tiny parts adopted from code by Kevin Hilman <khilman@baylibre.com>)
+ */
+
+#include <linux/clk.h>
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/sched_clock.h>
+
+#include <clocksource/timer-davinci.h>
+
+#undef pr_fmt
+#define pr_fmt(fmt) "%s: " fmt "\n", __func__
+
+#define DAVINCI_TIMER_REG_TIM12 0x10
+#define DAVINCI_TIMER_REG_TIM34 0x14
+#define DAVINCI_TIMER_REG_PRD12 0x18
+#define DAVINCI_TIMER_REG_PRD34 0x1c
+#define DAVINCI_TIMER_REG_TCR 0x20
+#define DAVINCI_TIMER_REG_TGCR 0x24
+
+#define DAVINCI_TIMER_TIMMODE_MASK GENMASK(3, 2)
+#define DAVINCI_TIMER_RESET_MASK GENMASK(1, 0)
+#define DAVINCI_TIMER_TIMMODE_32BIT_UNCHAINED BIT(2)
+#define DAVINCI_TIMER_UNRESET GENMASK(1, 0)
+
+#define DAVINCI_TIMER_ENAMODE_MASK GENMASK(1, 0)
+#define DAVINCI_TIMER_ENAMODE_DISABLED 0x00
+#define DAVINCI_TIMER_ENAMODE_ONESHOT BIT(0)
+#define DAVINCI_TIMER_ENAMODE_PERIODIC BIT(1)
+
+#define DAVINCI_TIMER_ENAMODE_SHIFT_TIM12 6
+#define DAVINCI_TIMER_ENAMODE_SHIFT_TIM34 22
+
+#define DAVINCI_TIMER_MIN_DELTA 0x01
+#define DAVINCI_TIMER_MAX_DELTA 0xfffffffe
+
+#define DAVINCI_TIMER_CLKSRC_BITS 32
+
+#define DAVINCI_TIMER_TGCR_DEFAULT \
+ (DAVINCI_TIMER_TIMMODE_32BIT_UNCHAINED | DAVINCI_TIMER_UNRESET)
+
+struct davinci_clockevent {
+ struct clock_event_device dev;
+ void __iomem *base;
+ unsigned int cmp_off;
+};
+
+/*
+ * This must be globally accessible by davinci_timer_read_sched_clock(), so
+ * let's keep it here.
+ */
+static struct {
+ struct clocksource dev;
+ void __iomem *base;
+ unsigned int tim_off;
+} davinci_clocksource;
+
+static struct davinci_clockevent *
+to_davinci_clockevent(struct clock_event_device *clockevent)
+{
+ return container_of(clockevent, struct davinci_clockevent, dev);
+}
+
+static unsigned int
+davinci_clockevent_read(struct davinci_clockevent *clockevent,
+ unsigned int reg)
+{
+ return readl_relaxed(clockevent->base + reg);
+}
+
+static void davinci_clockevent_write(struct davinci_clockevent *clockevent,
+ unsigned int reg, unsigned int val)
+{
+ writel_relaxed(val, clockevent->base + reg);
+}
+
+static void davinci_tim12_shutdown(void __iomem *base)
+{
+ unsigned int tcr;
+
+ tcr = DAVINCI_TIMER_ENAMODE_DISABLED <<
+ DAVINCI_TIMER_ENAMODE_SHIFT_TIM12;
+ /*
+ * This function is only ever called if we're using both timer
+ * halves. In this case TIM34 runs in periodic mode and we must
+ * not modify it.
+ */
+ tcr |= DAVINCI_TIMER_ENAMODE_PERIODIC <<
+ DAVINCI_TIMER_ENAMODE_SHIFT_TIM34;
+
+ writel_relaxed(tcr, base + DAVINCI_TIMER_REG_TCR);
+}
+
+static void davinci_tim12_set_oneshot(void __iomem *base)
+{
+ unsigned int tcr;
+
+ tcr = DAVINCI_TIMER_ENAMODE_ONESHOT <<
+ DAVINCI_TIMER_ENAMODE_SHIFT_TIM12;
+ /* Same as above. */
+ tcr |= DAVINCI_TIMER_ENAMODE_PERIODIC <<
+ DAVINCI_TIMER_ENAMODE_SHIFT_TIM34;
+
+ writel_relaxed(tcr, base + DAVINCI_TIMER_REG_TCR);
+}
+
+static int davinci_clockevent_shutdown(struct clock_event_device *dev)
+{
+ struct davinci_clockevent *clockevent;
+
+ clockevent = to_davinci_clockevent(dev);
+
+ davinci_tim12_shutdown(clockevent->base);
+
+ return 0;
+}
+
+static int davinci_clockevent_set_oneshot(struct clock_event_device *dev)
+{
+ struct davinci_clockevent *clockevent = to_davinci_clockevent(dev);
+
+ davinci_clockevent_write(clockevent, DAVINCI_TIMER_REG_TIM12, 0x0);
+
+ davinci_tim12_set_oneshot(clockevent->base);
+
+ return 0;
+}
+
+static int
+davinci_clockevent_set_next_event_std(unsigned long cycles,
+ struct clock_event_device *dev)
+{
+ struct davinci_clockevent *clockevent = to_davinci_clockevent(dev);
+
+ davinci_clockevent_shutdown(dev);
+
+ davinci_clockevent_write(clockevent, DAVINCI_TIMER_REG_TIM12, 0x0);
+ davinci_clockevent_write(clockevent, DAVINCI_TIMER_REG_PRD12, cycles);
+
+ davinci_clockevent_set_oneshot(dev);
+
+ return 0;
+}
+
+static int
+davinci_clockevent_set_next_event_cmp(unsigned long cycles,
+ struct clock_event_device *dev)
+{
+ struct davinci_clockevent *clockevent = to_davinci_clockevent(dev);
+ unsigned int curr_time;
+
+ curr_time = davinci_clockevent_read(clockevent,
+ DAVINCI_TIMER_REG_TIM12);
+ davinci_clockevent_write(clockevent,
+ clockevent->cmp_off, curr_time + cycles);
+
+ return 0;
+}
+
+static irqreturn_t davinci_timer_irq_timer(int irq, void *data)
+{
+ struct davinci_clockevent *clockevent = data;
+
+ if (!clockevent_state_oneshot(&clockevent->dev))
+ davinci_tim12_shutdown(clockevent->base);
+
+ clockevent->dev.event_handler(&clockevent->dev);
+
+ return IRQ_HANDLED;
+}
+
+static u64 notrace davinci_timer_read_sched_clock(void)
+{
+ return readl_relaxed(davinci_clocksource.base +
+ davinci_clocksource.tim_off);
+}
+
+static u64 davinci_clocksource_read(struct clocksource *dev)
+{
+ return davinci_timer_read_sched_clock();
+}
+
+/*
+ * Standard use-case: we're using tim12 for clockevent and tim34 for
+ * clocksource. The default is making the former run in oneshot mode
+ * and the latter in periodic mode.
+ */
+static void davinci_clocksource_init_tim34(void __iomem *base)
+{
+ int tcr;
+
+ tcr = DAVINCI_TIMER_ENAMODE_PERIODIC <<
+ DAVINCI_TIMER_ENAMODE_SHIFT_TIM34;
+ tcr |= DAVINCI_TIMER_ENAMODE_ONESHOT <<
+ DAVINCI_TIMER_ENAMODE_SHIFT_TIM12;
+
+ writel_relaxed(0x0, base + DAVINCI_TIMER_REG_TIM34);
+ writel_relaxed(UINT_MAX, base + DAVINCI_TIMER_REG_PRD34);
+ writel_relaxed(tcr, base + DAVINCI_TIMER_REG_TCR);
+}
+
+/*
+ * Special use-case on da830: the DSP may use tim34. We're using tim12 for
+ * both clocksource and clockevent. We set tim12 to periodic and don't touch
+ * tim34.
+ */
+static void davinci_clocksource_init_tim12(void __iomem *base)
+{
+ unsigned int tcr;
+
+ tcr = DAVINCI_TIMER_ENAMODE_PERIODIC <<
+ DAVINCI_TIMER_ENAMODE_SHIFT_TIM12;
+
+ writel_relaxed(0x0, base + DAVINCI_TIMER_REG_TIM12);
+ writel_relaxed(UINT_MAX, base + DAVINCI_TIMER_REG_PRD12);
+ writel_relaxed(tcr, base + DAVINCI_TIMER_REG_TCR);
+}
+
+static void davinci_timer_init(void __iomem *base)
+{
+ /* Set clock to internal mode and disable it. */
+ writel_relaxed(0x0, base + DAVINCI_TIMER_REG_TCR);
+ /*
+ * Reset both 32-bit timers, set no prescaler for timer 34, set the
+ * timer to dual 32-bit unchained mode, unreset both 32-bit timers.
+ */
+ writel_relaxed(DAVINCI_TIMER_TGCR_DEFAULT,
+ base + DAVINCI_TIMER_REG_TGCR);
+ /* Init both counters to zero. */
+ writel_relaxed(0x0, base + DAVINCI_TIMER_REG_TIM12);
+ writel_relaxed(0x0, base + DAVINCI_TIMER_REG_TIM34);
+}
+
+int __init davinci_timer_register(struct clk *clk,
+ const struct davinci_timer_cfg *timer_cfg)
+{
+ struct davinci_clockevent *clockevent;
+ unsigned int tick_rate;
+ void __iomem *base;
+ int rv;
+
+ rv = clk_prepare_enable(clk);
+ if (rv) {
+ pr_err("Unable to prepare and enable the timer clock");
+ return rv;
+ }
+
+ if (!request_mem_region(timer_cfg->reg.start,
+ resource_size(&timer_cfg->reg),
+ "davinci-timer")) {
+ pr_err("Unable to request memory region");
+ return -EBUSY;
+ }
+
+ base = ioremap(timer_cfg->reg.start, resource_size(&timer_cfg->reg));
+ if (!base) {
+ pr_err("Unable to map the register range");
+ return -ENOMEM;
+ }
+
+ davinci_timer_init(base);
+ tick_rate = clk_get_rate(clk);
+
+ clockevent = kzalloc(sizeof(*clockevent), GFP_KERNEL | __GFP_NOFAIL);
+ if (!clockevent) {
+ pr_err("Error allocating memory for clockevent data");
+ return -ENOMEM;
+ }
+
+ clockevent->dev.name = "tim12";
+ clockevent->dev.features = CLOCK_EVT_FEAT_ONESHOT;
+ clockevent->dev.cpumask = cpumask_of(0);
+ clockevent->base = base;
+
+ if (timer_cfg->cmp_off) {
+ clockevent->cmp_off = timer_cfg->cmp_off;
+ clockevent->dev.set_next_event =
+ davinci_clockevent_set_next_event_cmp;
+ } else {
+ clockevent->dev.set_next_event =
+ davinci_clockevent_set_next_event_std;
+ clockevent->dev.set_state_oneshot =
+ davinci_clockevent_set_oneshot;
+ clockevent->dev.set_state_shutdown =
+ davinci_clockevent_shutdown;
+ }
+
+ rv = request_irq(timer_cfg->irq[DAVINCI_TIMER_CLOCKEVENT_IRQ].start,
+ davinci_timer_irq_timer, IRQF_TIMER,
+ "clockevent/tim12", clockevent);
+ if (rv) {
+ pr_err("Unable to request the clockevent interrupt");
+ return rv;
+ }
+
+ clockevents_config_and_register(&clockevent->dev, tick_rate,
+ DAVINCI_TIMER_MIN_DELTA,
+ DAVINCI_TIMER_MAX_DELTA);
+
+ davinci_clocksource.dev.rating = 300;
+ davinci_clocksource.dev.read = davinci_clocksource_read;
+ davinci_clocksource.dev.mask =
+ CLOCKSOURCE_MASK(DAVINCI_TIMER_CLKSRC_BITS);
+ davinci_clocksource.dev.flags = CLOCK_SOURCE_IS_CONTINUOUS;
+ davinci_clocksource.base = base;
+
+ if (timer_cfg->cmp_off) {
+ davinci_clocksource.dev.name = "tim12";
+ davinci_clocksource.tim_off = DAVINCI_TIMER_REG_TIM12;
+ davinci_clocksource_init_tim12(base);
+ } else {
+ davinci_clocksource.dev.name = "tim34";
+ davinci_clocksource.tim_off = DAVINCI_TIMER_REG_TIM34;
+ davinci_clocksource_init_tim34(base);
+ }
+
+ rv = clocksource_register_hz(&davinci_clocksource.dev, tick_rate);
+ if (rv) {
+ pr_err("Unable to register clocksource");
+ return rv;
+ }
+
+ sched_clock_register(davinci_timer_read_sched_clock,
+ DAVINCI_TIMER_CLKSRC_BITS, tick_rate);
+
+ return 0;
+}
+
+static int __init of_davinci_timer_register(struct device_node *np)
+{
+ struct davinci_timer_cfg timer_cfg = { };
+ struct clk *clk;
+ int rv;
+
+ rv = of_address_to_resource(np, 0, &timer_cfg.reg);
+ if (rv) {
+ pr_err("Unable to get the register range for timer");
+ return rv;
+ }
+
+ rv = of_irq_to_resource_table(np, timer_cfg.irq,
+ DAVINCI_TIMER_NUM_IRQS);
+ if (rv != DAVINCI_TIMER_NUM_IRQS) {
+ pr_err("Unable to get the interrupts for timer");
+ return rv;
+ }
+
+ clk = of_clk_get(np, 0);
+ if (IS_ERR(clk)) {
+ pr_err("Unable to get the timer clock");
+ return PTR_ERR(clk);
+ }
+
+ rv = davinci_timer_register(clk, &timer_cfg);
+ if (rv)
+ clk_put(clk);
+
+ return rv;
+}
+TIMER_OF_DECLARE(davinci_timer, "ti,da830-timer", of_davinci_timer_register);
diff --git a/drivers/clocksource/timer-imx-sysctr.c b/drivers/clocksource/timer-imx-sysctr.c
new file mode 100644
index 000000000000..fd7d68066efb
--- /dev/null
+++ b/drivers/clocksource/timer-imx-sysctr.c
@@ -0,0 +1,145 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright 2017-2019 NXP
+
+#include <linux/interrupt.h>
+#include <linux/clockchips.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#include "timer-of.h"
+
+#define CMP_OFFSET 0x10000
+
+#define CNTCV_LO 0x8
+#define CNTCV_HI 0xc
+#define CMPCV_LO (CMP_OFFSET + 0x20)
+#define CMPCV_HI (CMP_OFFSET + 0x24)
+#define CMPCR (CMP_OFFSET + 0x2c)
+
+#define SYS_CTR_EN 0x1
+#define SYS_CTR_IRQ_MASK 0x2
+
+static void __iomem *sys_ctr_base;
+static u32 cmpcr;
+
+static void sysctr_timer_enable(bool enable)
+{
+ writel(enable ? cmpcr | SYS_CTR_EN : cmpcr, sys_ctr_base + CMPCR);
+}
+
+static void sysctr_irq_acknowledge(void)
+{
+ /*
+ * clear the enable bit(EN =0) will clear
+ * the status bit(ISTAT = 0), then the interrupt
+ * signal will be negated(acknowledged).
+ */
+ sysctr_timer_enable(false);
+}
+
+static inline u64 sysctr_read_counter(void)
+{
+ u32 cnt_hi, tmp_hi, cnt_lo;
+
+ do {
+ cnt_hi = readl_relaxed(sys_ctr_base + CNTCV_HI);
+ cnt_lo = readl_relaxed(sys_ctr_base + CNTCV_LO);
+ tmp_hi = readl_relaxed(sys_ctr_base + CNTCV_HI);
+ } while (tmp_hi != cnt_hi);
+
+ return ((u64) cnt_hi << 32) | cnt_lo;
+}
+
+static int sysctr_set_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ u32 cmp_hi, cmp_lo;
+ u64 next;
+
+ sysctr_timer_enable(false);
+
+ next = sysctr_read_counter();
+
+ next += delta;
+
+ cmp_hi = (next >> 32) & 0x00fffff;
+ cmp_lo = next & 0xffffffff;
+
+ writel_relaxed(cmp_hi, sys_ctr_base + CMPCV_HI);
+ writel_relaxed(cmp_lo, sys_ctr_base + CMPCV_LO);
+
+ sysctr_timer_enable(true);
+
+ return 0;
+}
+
+static int sysctr_set_state_oneshot(struct clock_event_device *evt)
+{
+ return 0;
+}
+
+static int sysctr_set_state_shutdown(struct clock_event_device *evt)
+{
+ sysctr_timer_enable(false);
+
+ return 0;
+}
+
+static irqreturn_t sysctr_timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = dev_id;
+
+ sysctr_irq_acknowledge();
+
+ evt->event_handler(evt);
+
+ return IRQ_HANDLED;
+}
+
+static struct timer_of to_sysctr = {
+ .flags = TIMER_OF_IRQ | TIMER_OF_CLOCK | TIMER_OF_BASE,
+ .clkevt = {
+ .name = "i.MX system counter timer",
+ .features = CLOCK_EVT_FEAT_ONESHOT |
+ CLOCK_EVT_FEAT_DYNIRQ,
+ .set_state_oneshot = sysctr_set_state_oneshot,
+ .set_next_event = sysctr_set_next_event,
+ .set_state_shutdown = sysctr_set_state_shutdown,
+ .rating = 200,
+ },
+ .of_irq = {
+ .handler = sysctr_timer_interrupt,
+ .flags = IRQF_TIMER | IRQF_IRQPOLL,
+ },
+ .of_clk = {
+ .name = "per",
+ },
+};
+
+static void __init sysctr_clockevent_init(void)
+{
+ to_sysctr.clkevt.cpumask = cpumask_of(0);
+
+ clockevents_config_and_register(&to_sysctr.clkevt,
+ timer_of_rate(&to_sysctr),
+ 0xff, 0x7fffffff);
+}
+
+static int __init sysctr_timer_init(struct device_node *np)
+{
+ int ret = 0;
+
+ ret = timer_of_init(np, &to_sysctr);
+ if (ret)
+ return ret;
+
+ sys_ctr_base = timer_of_base(&to_sysctr);
+ cmpcr = readl(sys_ctr_base + CMPCR);
+ cmpcr &= ~SYS_CTR_EN;
+
+ sysctr_clockevent_init();
+
+ return 0;
+}
+TIMER_OF_DECLARE(sysctr_timer, "nxp,sysctr-timer", sysctr_timer_init);
diff --git a/drivers/clocksource/timer-ixp4xx.c b/drivers/clocksource/timer-ixp4xx.c
index 5c2190b654cd..9396745e1c17 100644
--- a/drivers/clocksource/timer-ixp4xx.c
+++ b/drivers/clocksource/timer-ixp4xx.c
@@ -75,14 +75,19 @@ to_ixp4xx_timer(struct clock_event_device *evt)
return container_of(evt, struct ixp4xx_timer, clkevt);
}
-static u64 notrace ixp4xx_read_sched_clock(void)
+static unsigned long ixp4xx_read_timer(void)
{
return __raw_readl(local_ixp4xx_timer->base + IXP4XX_OSTS_OFFSET);
}
+static u64 notrace ixp4xx_read_sched_clock(void)
+{
+ return ixp4xx_read_timer();
+}
+
static u64 ixp4xx_clocksource_read(struct clocksource *c)
{
- return __raw_readl(local_ixp4xx_timer->base + IXP4XX_OSTS_OFFSET);
+ return ixp4xx_read_timer();
}
static irqreturn_t ixp4xx_timer_interrupt(int irq, void *dev_id)
@@ -224,6 +229,13 @@ static __init int ixp4xx_timer_register(void __iomem *base,
sched_clock_register(ixp4xx_read_sched_clock, 32, timer_freq);
+#ifdef CONFIG_ARM
+ /* Also use this timer for delays */
+ tmr->delay_timer.read_current_timer = ixp4xx_read_timer;
+ tmr->delay_timer.freq = timer_freq;
+ register_current_timer_delay(&tmr->delay_timer);
+#endif
+
return 0;
}
diff --git a/drivers/clocksource/timer-meson6.c b/drivers/clocksource/timer-meson6.c
index 84bd9479c3f8..9e8b467c71da 100644
--- a/drivers/clocksource/timer-meson6.c
+++ b/drivers/clocksource/timer-meson6.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Amlogic Meson6 SoCs timer handling.
*
* Copyright (C) 2014 Carlo Caione <carlo@caione.org>
*
* Based on code from Amlogic, Inc
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
*/
#include <linux/bitfield.h>
diff --git a/drivers/clocksource/timer-tegra.c b/drivers/clocksource/timer-tegra.c
new file mode 100644
index 000000000000..e9635c25eef4
--- /dev/null
+++ b/drivers/clocksource/timer-tegra.c
@@ -0,0 +1,416 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * Author:
+ * Colin Cross <ccross@google.com>
+ */
+
+#define pr_fmt(fmt) "tegra-timer: " fmt
+
+#include <linux/clk.h>
+#include <linux/clockchips.h>
+#include <linux/cpu.h>
+#include <linux/cpumask.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/percpu.h>
+#include <linux/sched_clock.h>
+#include <linux/time.h>
+
+#include "timer-of.h"
+
+#define RTC_SECONDS 0x08
+#define RTC_SHADOW_SECONDS 0x0c
+#define RTC_MILLISECONDS 0x10
+
+#define TIMERUS_CNTR_1US 0x10
+#define TIMERUS_USEC_CFG 0x14
+#define TIMERUS_CNTR_FREEZE 0x4c
+
+#define TIMER_PTV 0x0
+#define TIMER_PTV_EN BIT(31)
+#define TIMER_PTV_PER BIT(30)
+#define TIMER_PCR 0x4
+#define TIMER_PCR_INTR_CLR BIT(30)
+
+#define TIMER1_BASE 0x00
+#define TIMER2_BASE 0x08
+#define TIMER3_BASE 0x50
+#define TIMER4_BASE 0x58
+#define TIMER10_BASE 0x90
+
+#define TIMER1_IRQ_IDX 0
+#define TIMER10_IRQ_IDX 10
+
+#define TIMER_1MHz 1000000
+
+static u32 usec_config;
+static void __iomem *timer_reg_base;
+
+static int tegra_timer_set_next_event(unsigned long cycles,
+ struct clock_event_device *evt)
+{
+ void __iomem *reg_base = timer_of_base(to_timer_of(evt));
+
+ /*
+ * Tegra's timer uses n+1 scheme for the counter, i.e. timer will
+ * fire after one tick if 0 is loaded.
+ *
+ * The minimum and maximum numbers of oneshot ticks are defined
+ * by clockevents_config_and_register(1, 0x1fffffff + 1) invocation
+ * below in the code. Hence the cycles (ticks) can't be outside of
+ * a range supportable by hardware.
+ */
+ writel_relaxed(TIMER_PTV_EN | (cycles - 1), reg_base + TIMER_PTV);
+
+ return 0;
+}
+
+static int tegra_timer_shutdown(struct clock_event_device *evt)
+{
+ void __iomem *reg_base = timer_of_base(to_timer_of(evt));
+
+ writel_relaxed(0, reg_base + TIMER_PTV);
+
+ return 0;
+}
+
+static int tegra_timer_set_periodic(struct clock_event_device *evt)
+{
+ void __iomem *reg_base = timer_of_base(to_timer_of(evt));
+ unsigned long period = timer_of_period(to_timer_of(evt));
+
+ writel_relaxed(TIMER_PTV_EN | TIMER_PTV_PER | (period - 1),
+ reg_base + TIMER_PTV);
+
+ return 0;
+}
+
+static irqreturn_t tegra_timer_isr(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = dev_id;
+ void __iomem *reg_base = timer_of_base(to_timer_of(evt));
+
+ writel_relaxed(TIMER_PCR_INTR_CLR, reg_base + TIMER_PCR);
+ evt->event_handler(evt);
+
+ return IRQ_HANDLED;
+}
+
+static void tegra_timer_suspend(struct clock_event_device *evt)
+{
+ void __iomem *reg_base = timer_of_base(to_timer_of(evt));
+
+ writel_relaxed(TIMER_PCR_INTR_CLR, reg_base + TIMER_PCR);
+}
+
+static void tegra_timer_resume(struct clock_event_device *evt)
+{
+ writel_relaxed(usec_config, timer_reg_base + TIMERUS_USEC_CFG);
+}
+
+static DEFINE_PER_CPU(struct timer_of, tegra_to) = {
+ .flags = TIMER_OF_CLOCK | TIMER_OF_BASE,
+
+ .clkevt = {
+ .name = "tegra_timer",
+ .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,
+ .set_next_event = tegra_timer_set_next_event,
+ .set_state_shutdown = tegra_timer_shutdown,
+ .set_state_periodic = tegra_timer_set_periodic,
+ .set_state_oneshot = tegra_timer_shutdown,
+ .tick_resume = tegra_timer_shutdown,
+ .suspend = tegra_timer_suspend,
+ .resume = tegra_timer_resume,
+ },
+};
+
+static int tegra_timer_setup(unsigned int cpu)
+{
+ struct timer_of *to = per_cpu_ptr(&tegra_to, cpu);
+
+ writel_relaxed(0, timer_of_base(to) + TIMER_PTV);
+ writel_relaxed(TIMER_PCR_INTR_CLR, timer_of_base(to) + TIMER_PCR);
+
+ irq_force_affinity(to->clkevt.irq, cpumask_of(cpu));
+ enable_irq(to->clkevt.irq);
+
+ /*
+ * Tegra's timer uses n+1 scheme for the counter, i.e. timer will
+ * fire after one tick if 0 is loaded and thus minimum number of
+ * ticks is 1. In result both of the clocksource's tick limits are
+ * higher than a minimum and maximum that hardware register can
+ * take by 1, this is then taken into account by set_next_event
+ * callback.
+ */
+ clockevents_config_and_register(&to->clkevt, timer_of_rate(to),
+ 1, /* min */
+ 0x1fffffff + 1); /* max 29 bits + 1 */
+
+ return 0;
+}
+
+static int tegra_timer_stop(unsigned int cpu)
+{
+ struct timer_of *to = per_cpu_ptr(&tegra_to, cpu);
+
+ to->clkevt.set_state_shutdown(&to->clkevt);
+ disable_irq_nosync(to->clkevt.irq);
+
+ return 0;
+}
+
+static u64 notrace tegra_read_sched_clock(void)
+{
+ return readl_relaxed(timer_reg_base + TIMERUS_CNTR_1US);
+}
+
+#ifdef CONFIG_ARM
+static unsigned long tegra_delay_timer_read_counter_long(void)
+{
+ return readl_relaxed(timer_reg_base + TIMERUS_CNTR_1US);
+}
+
+static struct delay_timer tegra_delay_timer = {
+ .read_current_timer = tegra_delay_timer_read_counter_long,
+ .freq = TIMER_1MHz,
+};
+#endif
+
+static struct timer_of suspend_rtc_to = {
+ .flags = TIMER_OF_BASE | TIMER_OF_CLOCK,
+};
+
+/*
+ * tegra_rtc_read - Reads the Tegra RTC registers
+ * Care must be taken that this function is not called while the
+ * tegra_rtc driver could be executing to avoid race conditions
+ * on the RTC shadow register
+ */
+static u64 tegra_rtc_read_ms(struct clocksource *cs)
+{
+ void __iomem *reg_base = timer_of_base(&suspend_rtc_to);
+
+ u32 ms = readl_relaxed(reg_base + RTC_MILLISECONDS);
+ u32 s = readl_relaxed(reg_base + RTC_SHADOW_SECONDS);
+
+ return (u64)s * MSEC_PER_SEC + ms;
+}
+
+static struct clocksource suspend_rtc_clocksource = {
+ .name = "tegra_suspend_timer",
+ .rating = 200,
+ .read = tegra_rtc_read_ms,
+ .mask = CLOCKSOURCE_MASK(32),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_SUSPEND_NONSTOP,
+};
+
+static inline unsigned int tegra_base_for_cpu(int cpu, bool tegra20)
+{
+ if (tegra20) {
+ switch (cpu) {
+ case 0:
+ return TIMER1_BASE;
+ case 1:
+ return TIMER2_BASE;
+ case 2:
+ return TIMER3_BASE;
+ default:
+ return TIMER4_BASE;
+ }
+ }
+
+ return TIMER10_BASE + cpu * 8;
+}
+
+static inline unsigned int tegra_irq_idx_for_cpu(int cpu, bool tegra20)
+{
+ if (tegra20)
+ return TIMER1_IRQ_IDX + cpu;
+
+ return TIMER10_IRQ_IDX + cpu;
+}
+
+static inline unsigned long tegra_rate_for_timer(struct timer_of *to,
+ bool tegra20)
+{
+ /*
+ * TIMER1-9 are fixed to 1MHz, TIMER10-13 are running off the
+ * parent clock.
+ */
+ if (tegra20)
+ return TIMER_1MHz;
+
+ return timer_of_rate(to);
+}
+
+static int __init tegra_init_timer(struct device_node *np, bool tegra20,
+ int rating)
+{
+ struct timer_of *to;
+ int cpu, ret;
+
+ to = this_cpu_ptr(&tegra_to);
+ ret = timer_of_init(np, to);
+ if (ret)
+ goto out;
+
+ timer_reg_base = timer_of_base(to);
+
+ /*
+ * Configure microsecond timers to have 1MHz clock
+ * Config register is 0xqqww, where qq is "dividend", ww is "divisor"
+ * Uses n+1 scheme
+ */
+ switch (timer_of_rate(to)) {
+ case 12000000:
+ usec_config = 0x000b; /* (11+1)/(0+1) */
+ break;
+ case 12800000:
+ usec_config = 0x043f; /* (63+1)/(4+1) */
+ break;
+ case 13000000:
+ usec_config = 0x000c; /* (12+1)/(0+1) */
+ break;
+ case 16800000:
+ usec_config = 0x0453; /* (83+1)/(4+1) */
+ break;
+ case 19200000:
+ usec_config = 0x045f; /* (95+1)/(4+1) */
+ break;
+ case 26000000:
+ usec_config = 0x0019; /* (25+1)/(0+1) */
+ break;
+ case 38400000:
+ usec_config = 0x04bf; /* (191+1)/(4+1) */
+ break;
+ case 48000000:
+ usec_config = 0x002f; /* (47+1)/(0+1) */
+ break;
+ default:
+ ret = -EINVAL;
+ goto out;
+ }
+
+ writel_relaxed(usec_config, timer_reg_base + TIMERUS_USEC_CFG);
+
+ for_each_possible_cpu(cpu) {
+ struct timer_of *cpu_to = per_cpu_ptr(&tegra_to, cpu);
+ unsigned long flags = IRQF_TIMER | IRQF_NOBALANCING;
+ unsigned long rate = tegra_rate_for_timer(to, tegra20);
+ unsigned int base = tegra_base_for_cpu(cpu, tegra20);
+ unsigned int idx = tegra_irq_idx_for_cpu(cpu, tegra20);
+ unsigned int irq = irq_of_parse_and_map(np, idx);
+
+ if (!irq) {
+ pr_err("failed to map irq for cpu%d\n", cpu);
+ ret = -EINVAL;
+ goto out_irq;
+ }
+
+ cpu_to->clkevt.irq = irq;
+ cpu_to->clkevt.rating = rating;
+ cpu_to->clkevt.cpumask = cpumask_of(cpu);
+ cpu_to->of_base.base = timer_reg_base + base;
+ cpu_to->of_clk.period = rate / HZ;
+ cpu_to->of_clk.rate = rate;
+
+ irq_set_status_flags(cpu_to->clkevt.irq, IRQ_NOAUTOEN);
+
+ ret = request_irq(cpu_to->clkevt.irq, tegra_timer_isr, flags,
+ cpu_to->clkevt.name, &cpu_to->clkevt);
+ if (ret) {
+ pr_err("failed to set up irq for cpu%d: %d\n",
+ cpu, ret);
+ irq_dispose_mapping(cpu_to->clkevt.irq);
+ cpu_to->clkevt.irq = 0;
+ goto out_irq;
+ }
+ }
+
+ sched_clock_register(tegra_read_sched_clock, 32, TIMER_1MHz);
+
+ ret = clocksource_mmio_init(timer_reg_base + TIMERUS_CNTR_1US,
+ "timer_us", TIMER_1MHz, 300, 32,
+ clocksource_mmio_readl_up);
+ if (ret)
+ pr_err("failed to register clocksource: %d\n", ret);
+
+#ifdef CONFIG_ARM
+ register_current_timer_delay(&tegra_delay_timer);
+#endif
+
+ ret = cpuhp_setup_state(CPUHP_AP_TEGRA_TIMER_STARTING,
+ "AP_TEGRA_TIMER_STARTING", tegra_timer_setup,
+ tegra_timer_stop);
+ if (ret)
+ pr_err("failed to set up cpu hp state: %d\n", ret);
+
+ return ret;
+
+out_irq:
+ for_each_possible_cpu(cpu) {
+ struct timer_of *cpu_to;
+
+ cpu_to = per_cpu_ptr(&tegra_to, cpu);
+ if (cpu_to->clkevt.irq) {
+ free_irq(cpu_to->clkevt.irq, &cpu_to->clkevt);
+ irq_dispose_mapping(cpu_to->clkevt.irq);
+ }
+ }
+
+ to->of_base.base = timer_reg_base;
+out:
+ timer_of_cleanup(to);
+
+ return ret;
+}
+
+static int __init tegra210_init_timer(struct device_node *np)
+{
+ /*
+ * Arch-timer can't survive across power cycle of CPU core and
+ * after CPUPORESET signal due to a system design shortcoming,
+ * hence tegra-timer is more preferable on Tegra210.
+ */
+ return tegra_init_timer(np, false, 460);
+}
+TIMER_OF_DECLARE(tegra210_timer, "nvidia,tegra210-timer", tegra210_init_timer);
+
+static int __init tegra20_init_timer(struct device_node *np)
+{
+ int rating;
+
+ /*
+ * Tegra20 and Tegra30 have Cortex A9 CPU that has a TWD timer,
+ * that timer runs off the CPU clock and hence is subjected to
+ * a jitter caused by DVFS clock rate changes. Tegra-timer is
+ * more preferable for older Tegra's, while later SoC generations
+ * have arch-timer as a main per-CPU timer and it is not affected
+ * by DVFS changes.
+ */
+ if (of_machine_is_compatible("nvidia,tegra20") ||
+ of_machine_is_compatible("nvidia,tegra30"))
+ rating = 460;
+ else
+ rating = 330;
+
+ return tegra_init_timer(np, true, rating);
+}
+TIMER_OF_DECLARE(tegra20_timer, "nvidia,tegra20-timer", tegra20_init_timer);
+
+static int __init tegra20_init_rtc(struct device_node *np)
+{
+ int ret;
+
+ ret = timer_of_init(np, &suspend_rtc_to);
+ if (ret)
+ return ret;
+
+ return clocksource_register_hz(&suspend_rtc_clocksource, 1000);
+}
+TIMER_OF_DECLARE(tegra20_rtc, "nvidia,tegra20-rtc", tegra20_init_rtc);
diff --git a/drivers/clocksource/timer-tegra20.c b/drivers/clocksource/timer-tegra20.c
deleted file mode 100644
index 1e7ece279730..000000000000
--- a/drivers/clocksource/timer-tegra20.c
+++ /dev/null
@@ -1,379 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2010 Google, Inc.
- *
- * Author:
- * Colin Cross <ccross@google.com>
- */
-
-#include <linux/clk.h>
-#include <linux/clockchips.h>
-#include <linux/cpu.h>
-#include <linux/cpumask.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/interrupt.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/percpu.h>
-#include <linux/sched_clock.h>
-#include <linux/time.h>
-
-#include "timer-of.h"
-
-#ifdef CONFIG_ARM
-#include <asm/mach/time.h>
-#endif
-
-#define RTC_SECONDS 0x08
-#define RTC_SHADOW_SECONDS 0x0c
-#define RTC_MILLISECONDS 0x10
-
-#define TIMERUS_CNTR_1US 0x10
-#define TIMERUS_USEC_CFG 0x14
-#define TIMERUS_CNTR_FREEZE 0x4c
-
-#define TIMER_PTV 0x0
-#define TIMER_PTV_EN BIT(31)
-#define TIMER_PTV_PER BIT(30)
-#define TIMER_PCR 0x4
-#define TIMER_PCR_INTR_CLR BIT(30)
-
-#ifdef CONFIG_ARM
-#define TIMER_CPU0 0x50 /* TIMER3 */
-#else
-#define TIMER_CPU0 0x90 /* TIMER10 */
-#define TIMER10_IRQ_IDX 10
-#define IRQ_IDX_FOR_CPU(cpu) (TIMER10_IRQ_IDX + cpu)
-#endif
-#define TIMER_BASE_FOR_CPU(cpu) (TIMER_CPU0 + (cpu) * 8)
-
-static u32 usec_config;
-static void __iomem *timer_reg_base;
-#ifdef CONFIG_ARM
-static struct delay_timer tegra_delay_timer;
-#endif
-
-static int tegra_timer_set_next_event(unsigned long cycles,
- struct clock_event_device *evt)
-{
- void __iomem *reg_base = timer_of_base(to_timer_of(evt));
-
- writel(TIMER_PTV_EN |
- ((cycles > 1) ? (cycles - 1) : 0), /* n+1 scheme */
- reg_base + TIMER_PTV);
-
- return 0;
-}
-
-static int tegra_timer_shutdown(struct clock_event_device *evt)
-{
- void __iomem *reg_base = timer_of_base(to_timer_of(evt));
-
- writel(0, reg_base + TIMER_PTV);
-
- return 0;
-}
-
-static int tegra_timer_set_periodic(struct clock_event_device *evt)
-{
- void __iomem *reg_base = timer_of_base(to_timer_of(evt));
-
- writel(TIMER_PTV_EN | TIMER_PTV_PER |
- ((timer_of_rate(to_timer_of(evt)) / HZ) - 1),
- reg_base + TIMER_PTV);
-
- return 0;
-}
-
-static irqreturn_t tegra_timer_isr(int irq, void *dev_id)
-{
- struct clock_event_device *evt = (struct clock_event_device *)dev_id;
- void __iomem *reg_base = timer_of_base(to_timer_of(evt));
-
- writel(TIMER_PCR_INTR_CLR, reg_base + TIMER_PCR);
- evt->event_handler(evt);
-
- return IRQ_HANDLED;
-}
-
-static void tegra_timer_suspend(struct clock_event_device *evt)
-{
- void __iomem *reg_base = timer_of_base(to_timer_of(evt));
-
- writel(TIMER_PCR_INTR_CLR, reg_base + TIMER_PCR);
-}
-
-static void tegra_timer_resume(struct clock_event_device *evt)
-{
- writel(usec_config, timer_reg_base + TIMERUS_USEC_CFG);
-}
-
-#ifdef CONFIG_ARM64
-static DEFINE_PER_CPU(struct timer_of, tegra_to) = {
- .flags = TIMER_OF_CLOCK | TIMER_OF_BASE,
-
- .clkevt = {
- .name = "tegra_timer",
- .rating = 460,
- .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,
- .set_next_event = tegra_timer_set_next_event,
- .set_state_shutdown = tegra_timer_shutdown,
- .set_state_periodic = tegra_timer_set_periodic,
- .set_state_oneshot = tegra_timer_shutdown,
- .tick_resume = tegra_timer_shutdown,
- .suspend = tegra_timer_suspend,
- .resume = tegra_timer_resume,
- },
-};
-
-static int tegra_timer_setup(unsigned int cpu)
-{
- struct timer_of *to = per_cpu_ptr(&tegra_to, cpu);
-
- irq_force_affinity(to->clkevt.irq, cpumask_of(cpu));
- enable_irq(to->clkevt.irq);
-
- clockevents_config_and_register(&to->clkevt, timer_of_rate(to),
- 1, /* min */
- 0x1fffffff); /* 29 bits */
-
- return 0;
-}
-
-static int tegra_timer_stop(unsigned int cpu)
-{
- struct timer_of *to = per_cpu_ptr(&tegra_to, cpu);
-
- to->clkevt.set_state_shutdown(&to->clkevt);
- disable_irq_nosync(to->clkevt.irq);
-
- return 0;
-}
-#else /* CONFIG_ARM */
-static struct timer_of tegra_to = {
- .flags = TIMER_OF_CLOCK | TIMER_OF_BASE | TIMER_OF_IRQ,
-
- .clkevt = {
- .name = "tegra_timer",
- .rating = 300,
- .features = CLOCK_EVT_FEAT_ONESHOT |
- CLOCK_EVT_FEAT_PERIODIC |
- CLOCK_EVT_FEAT_DYNIRQ,
- .set_next_event = tegra_timer_set_next_event,
- .set_state_shutdown = tegra_timer_shutdown,
- .set_state_periodic = tegra_timer_set_periodic,
- .set_state_oneshot = tegra_timer_shutdown,
- .tick_resume = tegra_timer_shutdown,
- .suspend = tegra_timer_suspend,
- .resume = tegra_timer_resume,
- .cpumask = cpu_possible_mask,
- },
-
- .of_irq = {
- .index = 2,
- .flags = IRQF_TIMER | IRQF_TRIGGER_HIGH,
- .handler = tegra_timer_isr,
- },
-};
-
-static u64 notrace tegra_read_sched_clock(void)
-{
- return readl(timer_reg_base + TIMERUS_CNTR_1US);
-}
-
-static unsigned long tegra_delay_timer_read_counter_long(void)
-{
- return readl(timer_reg_base + TIMERUS_CNTR_1US);
-}
-
-static struct timer_of suspend_rtc_to = {
- .flags = TIMER_OF_BASE | TIMER_OF_CLOCK,
-};
-
-/*
- * tegra_rtc_read - Reads the Tegra RTC registers
- * Care must be taken that this funciton is not called while the
- * tegra_rtc driver could be executing to avoid race conditions
- * on the RTC shadow register
- */
-static u64 tegra_rtc_read_ms(struct clocksource *cs)
-{
- u32 ms = readl(timer_of_base(&suspend_rtc_to) + RTC_MILLISECONDS);
- u32 s = readl(timer_of_base(&suspend_rtc_to) + RTC_SHADOW_SECONDS);
- return (u64)s * MSEC_PER_SEC + ms;
-}
-
-static struct clocksource suspend_rtc_clocksource = {
- .name = "tegra_suspend_timer",
- .rating = 200,
- .read = tegra_rtc_read_ms,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_SUSPEND_NONSTOP,
-};
-#endif
-
-static int tegra_timer_common_init(struct device_node *np, struct timer_of *to)
-{
- int ret = 0;
-
- ret = timer_of_init(np, to);
- if (ret < 0)
- goto out;
-
- timer_reg_base = timer_of_base(to);
-
- /*
- * Configure microsecond timers to have 1MHz clock
- * Config register is 0xqqww, where qq is "dividend", ww is "divisor"
- * Uses n+1 scheme
- */
- switch (timer_of_rate(to)) {
- case 12000000:
- usec_config = 0x000b; /* (11+1)/(0+1) */
- break;
- case 12800000:
- usec_config = 0x043f; /* (63+1)/(4+1) */
- break;
- case 13000000:
- usec_config = 0x000c; /* (12+1)/(0+1) */
- break;
- case 16800000:
- usec_config = 0x0453; /* (83+1)/(4+1) */
- break;
- case 19200000:
- usec_config = 0x045f; /* (95+1)/(4+1) */
- break;
- case 26000000:
- usec_config = 0x0019; /* (25+1)/(0+1) */
- break;
- case 38400000:
- usec_config = 0x04bf; /* (191+1)/(4+1) */
- break;
- case 48000000:
- usec_config = 0x002f; /* (47+1)/(0+1) */
- break;
- default:
- ret = -EINVAL;
- goto out;
- }
-
- writel(usec_config, timer_of_base(to) + TIMERUS_USEC_CFG);
-
-out:
- return ret;
-}
-
-#ifdef CONFIG_ARM64
-static int __init tegra_init_timer(struct device_node *np)
-{
- int cpu, ret = 0;
- struct timer_of *to;
-
- to = this_cpu_ptr(&tegra_to);
- ret = tegra_timer_common_init(np, to);
- if (ret < 0)
- goto out;
-
- for_each_possible_cpu(cpu) {
- struct timer_of *cpu_to;
-
- cpu_to = per_cpu_ptr(&tegra_to, cpu);
- cpu_to->of_base.base = timer_reg_base + TIMER_BASE_FOR_CPU(cpu);
- cpu_to->of_clk.rate = timer_of_rate(to);
- cpu_to->clkevt.cpumask = cpumask_of(cpu);
- cpu_to->clkevt.irq =
- irq_of_parse_and_map(np, IRQ_IDX_FOR_CPU(cpu));
- if (!cpu_to->clkevt.irq) {
- pr_err("%s: can't map IRQ for CPU%d\n",
- __func__, cpu);
- ret = -EINVAL;
- goto out;
- }
-
- irq_set_status_flags(cpu_to->clkevt.irq, IRQ_NOAUTOEN);
- ret = request_irq(cpu_to->clkevt.irq, tegra_timer_isr,
- IRQF_TIMER | IRQF_NOBALANCING,
- cpu_to->clkevt.name, &cpu_to->clkevt);
- if (ret) {
- pr_err("%s: cannot setup irq %d for CPU%d\n",
- __func__, cpu_to->clkevt.irq, cpu);
- ret = -EINVAL;
- goto out_irq;
- }
- }
-
- cpuhp_setup_state(CPUHP_AP_TEGRA_TIMER_STARTING,
- "AP_TEGRA_TIMER_STARTING", tegra_timer_setup,
- tegra_timer_stop);
-
- return ret;
-out_irq:
- for_each_possible_cpu(cpu) {
- struct timer_of *cpu_to;
-
- cpu_to = per_cpu_ptr(&tegra_to, cpu);
- if (cpu_to->clkevt.irq) {
- free_irq(cpu_to->clkevt.irq, &cpu_to->clkevt);
- irq_dispose_mapping(cpu_to->clkevt.irq);
- }
- }
-out:
- timer_of_cleanup(to);
- return ret;
-}
-#else /* CONFIG_ARM */
-static int __init tegra_init_timer(struct device_node *np)
-{
- int ret = 0;
-
- ret = tegra_timer_common_init(np, &tegra_to);
- if (ret < 0)
- goto out;
-
- tegra_to.of_base.base = timer_reg_base + TIMER_BASE_FOR_CPU(0);
- tegra_to.of_clk.rate = 1000000; /* microsecond timer */
-
- sched_clock_register(tegra_read_sched_clock, 32,
- timer_of_rate(&tegra_to));
- ret = clocksource_mmio_init(timer_reg_base + TIMERUS_CNTR_1US,
- "timer_us", timer_of_rate(&tegra_to),
- 300, 32, clocksource_mmio_readl_up);
- if (ret) {
- pr_err("Failed to register clocksource\n");
- goto out;
- }
-
- tegra_delay_timer.read_current_timer =
- tegra_delay_timer_read_counter_long;
- tegra_delay_timer.freq = timer_of_rate(&tegra_to);
- register_current_timer_delay(&tegra_delay_timer);
-
- clockevents_config_and_register(&tegra_to.clkevt,
- timer_of_rate(&tegra_to),
- 0x1,
- 0x1fffffff);
-
- return ret;
-out:
- timer_of_cleanup(&tegra_to);
-
- return ret;
-}
-
-static int __init tegra20_init_rtc(struct device_node *np)
-{
- int ret;
-
- ret = timer_of_init(np, &suspend_rtc_to);
- if (ret)
- return ret;
-
- clocksource_register_hz(&suspend_rtc_clocksource, 1000);
-
- return 0;
-}
-TIMER_OF_DECLARE(tegra20_rtc, "nvidia,tegra20-rtc", tegra20_init_rtc);
-#endif
-TIMER_OF_DECLARE(tegra210_timer, "nvidia,tegra210-timer", tegra_init_timer);
-TIMER_OF_DECLARE(tegra20_timer, "nvidia,tegra20-timer", tegra_init_timer);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 083bd8114db1..dd6b4b0b5f30 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -837,7 +837,7 @@ static int kfd_ioctl_get_clock_counters(struct file *filep,
/* No access to rdtsc. Using raw monotonic time */
args->cpu_clock_counter = ktime_get_raw_ns();
- args->system_clock_counter = ktime_get_boot_ns();
+ args->system_clock_counter = ktime_get_boottime_ns();
/* Since the counter is in nano-seconds we use 1GHz frequency */
args->system_clock_freq = 1000000000;
diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index 1c1a2514d6f3..c423e57ae888 100644
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -10,6 +10,9 @@ config HYPERV
Select this option to run Linux as a Hyper-V client operating
system.
+config HYPERV_TIMER
+ def_bool HYPERV
+
config HYPERV_TSCPAGE
def_bool HYPERV && X86_64
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index a1ea482183e8..6188fb7dda42 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -16,6 +16,7 @@
#include <linux/version.h>
#include <linux/random.h>
#include <linux/clockchips.h>
+#include <clocksource/hyperv_timer.h>
#include <asm/mshyperv.h>
#include "hyperv_vmbus.h"
@@ -23,21 +24,6 @@
struct hv_context hv_context;
/*
- * If false, we're using the old mechanism for stimer0 interrupts
- * where it sends a VMbus message when it expires. The old
- * mechanism is used when running on older versions of Hyper-V
- * that don't support Direct Mode. While Hyper-V provides
- * four stimer's per CPU, Linux uses only stimer0.
- */
-static bool direct_mode_enabled;
-static int stimer0_irq;
-static int stimer0_vector;
-
-#define HV_TIMER_FREQUENCY (10 * 1000 * 1000) /* 100ns period */
-#define HV_MAX_MAX_DELTA_TICKS 0xffffffff
-#define HV_MIN_DELTA_TICKS 1
-
-/*
* hv_init - Main initialization routine.
*
* This routine must be called before any other routines in here are called
@@ -47,9 +33,6 @@ int hv_init(void)
hv_context.cpu_context = alloc_percpu(struct hv_per_cpu_context);
if (!hv_context.cpu_context)
return -ENOMEM;
-
- direct_mode_enabled = ms_hyperv.misc_features &
- HV_STIMER_DIRECT_MODE_AVAILABLE;
return 0;
}
@@ -88,89 +71,6 @@ int hv_post_message(union hv_connection_id connection_id,
return status & 0xFFFF;
}
-/*
- * ISR for when stimer0 is operating in Direct Mode. Direct Mode
- * does not use VMbus or any VMbus messages, so process here and not
- * in the VMbus driver code.
- */
-
-static void hv_stimer0_isr(void)
-{
- struct hv_per_cpu_context *hv_cpu;
-
- hv_cpu = this_cpu_ptr(hv_context.cpu_context);
- hv_cpu->clk_evt->event_handler(hv_cpu->clk_evt);
- add_interrupt_randomness(stimer0_vector, 0);
-}
-
-static int hv_ce_set_next_event(unsigned long delta,
- struct clock_event_device *evt)
-{
- u64 current_tick;
-
- WARN_ON(!clockevent_state_oneshot(evt));
-
- current_tick = hyperv_cs->read(NULL);
- current_tick += delta;
- hv_init_timer(0, current_tick);
- return 0;
-}
-
-static int hv_ce_shutdown(struct clock_event_device *evt)
-{
- hv_init_timer(0, 0);
- hv_init_timer_config(0, 0);
- if (direct_mode_enabled)
- hv_disable_stimer0_percpu_irq(stimer0_irq);
-
- return 0;
-}
-
-static int hv_ce_set_oneshot(struct clock_event_device *evt)
-{
- union hv_stimer_config timer_cfg;
-
- timer_cfg.as_uint64 = 0;
- timer_cfg.enable = 1;
- timer_cfg.auto_enable = 1;
- if (direct_mode_enabled) {
- /*
- * When it expires, the timer will directly interrupt
- * on the specified hardware vector/IRQ.
- */
- timer_cfg.direct_mode = 1;
- timer_cfg.apic_vector = stimer0_vector;
- hv_enable_stimer0_percpu_irq(stimer0_irq);
- } else {
- /*
- * When it expires, the timer will generate a VMbus message,
- * to be handled by the normal VMbus interrupt handler.
- */
- timer_cfg.direct_mode = 0;
- timer_cfg.sintx = VMBUS_MESSAGE_SINT;
- }
- hv_init_timer_config(0, timer_cfg.as_uint64);
- return 0;
-}
-
-static void hv_init_clockevent_device(struct clock_event_device *dev, int cpu)
-{
- dev->name = "Hyper-V clockevent";
- dev->features = CLOCK_EVT_FEAT_ONESHOT;
- dev->cpumask = cpumask_of(cpu);
- dev->rating = 1000;
- /*
- * Avoid settint dev->owner = THIS_MODULE deliberately as doing so will
- * result in clockevents_config_and_register() taking additional
- * references to the hv_vmbus module making it impossible to unload.
- */
-
- dev->set_state_shutdown = hv_ce_shutdown;
- dev->set_state_oneshot = hv_ce_set_oneshot;
- dev->set_next_event = hv_ce_set_next_event;
-}
-
-
int hv_synic_alloc(void)
{
int cpu;
@@ -199,14 +99,6 @@ int hv_synic_alloc(void)
tasklet_init(&hv_cpu->msg_dpc,
vmbus_on_msg_dpc, (unsigned long) hv_cpu);
- hv_cpu->clk_evt = kzalloc(sizeof(struct clock_event_device),
- GFP_KERNEL);
- if (hv_cpu->clk_evt == NULL) {
- pr_err("Unable to allocate clock event device\n");
- goto err;
- }
- hv_init_clockevent_device(hv_cpu->clk_evt, cpu);
-
hv_cpu->synic_message_page =
(void *)get_zeroed_page(GFP_ATOMIC);
if (hv_cpu->synic_message_page == NULL) {
@@ -229,11 +121,6 @@ int hv_synic_alloc(void)
INIT_LIST_HEAD(&hv_cpu->chan_list);
}
- if (direct_mode_enabled &&
- hv_setup_stimer0_irq(&stimer0_irq, &stimer0_vector,
- hv_stimer0_isr))
- goto err;
-
return 0;
err:
/*
@@ -252,7 +139,6 @@ void hv_synic_free(void)
struct hv_per_cpu_context *hv_cpu
= per_cpu_ptr(hv_context.cpu_context, cpu);
- kfree(hv_cpu->clk_evt);
free_page((unsigned long)hv_cpu->synic_event_page);
free_page((unsigned long)hv_cpu->synic_message_page);
free_page((unsigned long)hv_cpu->post_msg_page);
@@ -311,36 +197,9 @@ int hv_synic_init(unsigned int cpu)
hv_set_synic_state(sctrl.as_uint64);
- /*
- * Register the per-cpu clockevent source.
- */
- if (ms_hyperv.features & HV_MSR_SYNTIMER_AVAILABLE)
- clockevents_config_and_register(hv_cpu->clk_evt,
- HV_TIMER_FREQUENCY,
- HV_MIN_DELTA_TICKS,
- HV_MAX_MAX_DELTA_TICKS);
- return 0;
-}
-
-/*
- * hv_synic_clockevents_cleanup - Cleanup clockevent devices
- */
-void hv_synic_clockevents_cleanup(void)
-{
- int cpu;
+ hv_stimer_init(cpu);
- if (!(ms_hyperv.features & HV_MSR_SYNTIMER_AVAILABLE))
- return;
-
- if (direct_mode_enabled)
- hv_remove_stimer0_irq(stimer0_irq);
-
- for_each_present_cpu(cpu) {
- struct hv_per_cpu_context *hv_cpu
- = per_cpu_ptr(hv_context.cpu_context, cpu);
-
- clockevents_unbind_device(hv_cpu->clk_evt, cpu);
- }
+ return 0;
}
/*
@@ -388,14 +247,7 @@ int hv_synic_cleanup(unsigned int cpu)
if (channel_found && vmbus_connection.conn_state == CONNECTED)
return -EBUSY;
- /* Turn off clockevent device */
- if (ms_hyperv.features & HV_MSR_SYNTIMER_AVAILABLE) {
- struct hv_per_cpu_context *hv_cpu
- = this_cpu_ptr(hv_context.cpu_context);
-
- clockevents_unbind_device(hv_cpu->clk_evt, cpu);
- hv_ce_shutdown(hv_cpu->clk_evt);
- }
+ hv_stimer_cleanup(cpu);
hv_get_synint_state(VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
index 7d3d31f099ea..e32681ee7b9f 100644
--- a/drivers/hv/hv_util.c
+++ b/drivers/hv/hv_util.c
@@ -17,6 +17,7 @@
#include <linux/hyperv.h>
#include <linux/clockchips.h>
#include <linux/ptp_clock_kernel.h>
+#include <clocksource/hyperv_timer.h>
#include <asm/mshyperv.h>
#include "hyperv_vmbus.h"
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index b8e1ff05f110..362e70e9d145 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -138,7 +138,6 @@ struct hv_per_cpu_context {
* per-cpu list of the channels based on their CPU affinity.
*/
struct list_head chan_list;
- struct clock_event_device *clk_evt;
};
struct hv_context {
@@ -176,8 +175,6 @@ extern int hv_synic_init(unsigned int cpu);
extern int hv_synic_cleanup(unsigned int cpu);
-extern void hv_synic_clockevents_cleanup(void);
-
/* Interface */
void hv_ringbuffer_pre_init(struct vmbus_channel *channel);
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 92b1874b3eb3..72d5a7cde7ea 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -30,6 +30,7 @@
#include <linux/kdebug.h>
#include <linux/efi.h>
#include <linux/random.h>
+#include <clocksource/hyperv_timer.h>
#include "hyperv_vmbus.h"
struct vmbus_dynid {
@@ -955,17 +956,6 @@ static void vmbus_onmessage_work(struct work_struct *work)
kfree(ctx);
}
-static void hv_process_timer_expiration(struct hv_message *msg,
- struct hv_per_cpu_context *hv_cpu)
-{
- struct clock_event_device *dev = hv_cpu->clk_evt;
-
- if (dev->event_handler)
- dev->event_handler(dev);
-
- vmbus_signal_eom(msg, HVMSG_TIMER_EXPIRED);
-}
-
void vmbus_on_msg_dpc(unsigned long data)
{
struct hv_per_cpu_context *hv_cpu = (void *)data;
@@ -1159,9 +1149,10 @@ static void vmbus_isr(void)
/* Check if there are actual msgs to be processed */
if (msg->header.message_type != HVMSG_NONE) {
- if (msg->header.message_type == HVMSG_TIMER_EXPIRED)
- hv_process_timer_expiration(msg, hv_cpu);
- else
+ if (msg->header.message_type == HVMSG_TIMER_EXPIRED) {
+ hv_stimer0_isr();
+ vmbus_signal_eom(msg, HVMSG_TIMER_EXPIRED);
+ } else
tasklet_schedule(&hv_cpu->msg_dpc);
}
@@ -1263,14 +1254,19 @@ static int vmbus_bus_init(void)
ret = hv_synic_alloc();
if (ret)
goto err_alloc;
+
+ ret = hv_stimer_alloc(VMBUS_MESSAGE_SINT);
+ if (ret < 0)
+ goto err_alloc;
+
/*
- * Initialize the per-cpu interrupt state and
- * connect to the host.
+ * Initialize the per-cpu interrupt state and stimer state.
+ * Then connect to the host.
*/
ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "hyperv/vmbus:online",
hv_synic_init, hv_synic_cleanup);
if (ret < 0)
- goto err_alloc;
+ goto err_cpuhp;
hyperv_cpuhp_online = ret;
ret = vmbus_connect();
@@ -1318,6 +1314,8 @@ static int vmbus_bus_init(void)
err_connect:
cpuhp_remove_state(hyperv_cpuhp_online);
+err_cpuhp:
+ hv_stimer_free();
err_alloc:
hv_synic_free();
hv_remove_vmbus_irq();
@@ -2064,7 +2062,7 @@ static struct acpi_driver vmbus_acpi_driver = {
static void hv_kexec_handler(void)
{
- hv_synic_clockevents_cleanup();
+ hv_stimer_global_cleanup();
vmbus_initiate_unload(false);
vmbus_connection.conn_state = DISCONNECTED;
/* Make sure conn_state is set as hv_synic_cleanup checks for it */
@@ -2075,6 +2073,8 @@ static void hv_kexec_handler(void)
static void hv_crash_handler(struct pt_regs *regs)
{
+ int cpu;
+
vmbus_initiate_unload(true);
/*
* In crash handler we can't schedule synic cleanup for all CPUs,
@@ -2082,7 +2082,9 @@ static void hv_crash_handler(struct pt_regs *regs)
* for kdump.
*/
vmbus_connection.conn_state = DISCONNECTED;
- hv_synic_cleanup(smp_processor_id());
+ cpu = smp_processor_id();
+ hv_stimer_cleanup(cpu);
+ hv_synic_cleanup(cpu);
hyperv_cleanup();
};
@@ -2131,7 +2133,7 @@ static void __exit vmbus_exit(void)
hv_remove_kexec_handler();
hv_remove_crash_handler();
vmbus_connection.conn_state = DISCONNECTED;
- hv_synic_clockevents_cleanup();
+ hv_stimer_global_cleanup();
vmbus_disconnect();
hv_remove_vmbus_irq();
for_each_online_cpu(cpu) {
diff --git a/drivers/iio/humidity/dht11.c b/drivers/iio/humidity/dht11.c
index c8159205c77d..4e22b3c3e488 100644
--- a/drivers/iio/humidity/dht11.c
+++ b/drivers/iio/humidity/dht11.c
@@ -149,7 +149,7 @@ static int dht11_decode(struct dht11 *dht11, int offset)
return -EIO;
}
- dht11->timestamp = ktime_get_boot_ns();
+ dht11->timestamp = ktime_get_boottime_ns();
if (hum_int < 4) { /* DHT22: 100000 = (3*256+232)*100 */
dht11->temperature = (((temp_int & 0x7f) << 8) + temp_dec) *
((temp_int & 0x80) ? -100 : 100);
@@ -177,7 +177,7 @@ static irqreturn_t dht11_handle_irq(int irq, void *data)
/* TODO: Consider making the handler safe for IRQ sharing */
if (dht11->num_edges < DHT11_EDGES_PER_READ && dht11->num_edges >= 0) {
- dht11->edges[dht11->num_edges].ts = ktime_get_boot_ns();
+ dht11->edges[dht11->num_edges].ts = ktime_get_boottime_ns();
dht11->edges[dht11->num_edges++].value =
gpio_get_value(dht11->gpio);
@@ -196,7 +196,7 @@ static int dht11_read_raw(struct iio_dev *iio_dev,
int ret, timeres, offset;
mutex_lock(&dht11->lock);
- if (dht11->timestamp + DHT11_DATA_VALID_TIME < ktime_get_boot_ns()) {
+ if (dht11->timestamp + DHT11_DATA_VALID_TIME < ktime_get_boottime_ns()) {
timeres = ktime_get_resolution_ns();
dev_dbg(dht11->dev, "current timeresolution: %dns\n", timeres);
if (timeres > DHT11_MIN_TIMERES) {
@@ -322,7 +322,7 @@ static int dht11_probe(struct platform_device *pdev)
return -EINVAL;
}
- dht11->timestamp = ktime_get_boot_ns() - DHT11_DATA_VALID_TIME - 1;
+ dht11->timestamp = ktime_get_boottime_ns() - DHT11_DATA_VALID_TIME - 1;
dht11->num_edges = -1;
platform_set_drvdata(pdev, iio);
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 245b5844028d..401d7ff99853 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -228,9 +228,9 @@ s64 iio_get_time_ns(const struct iio_dev *indio_dev)
ktime_get_coarse_ts64(&tp);
return timespec64_to_ns(&tp);
case CLOCK_BOOTTIME:
- return ktime_get_boot_ns();
+ return ktime_get_boottime_ns();
case CLOCK_TAI:
- return ktime_get_tai_ns();
+ return ktime_get_clocktai_ns();
default:
BUG();
}
diff --git a/drivers/infiniband/hw/mlx4/alias_GUID.c b/drivers/infiniband/hw/mlx4/alias_GUID.c
index 2a0b59a4b6eb..cca414ecfcd5 100644
--- a/drivers/infiniband/hw/mlx4/alias_GUID.c
+++ b/drivers/infiniband/hw/mlx4/alias_GUID.c
@@ -310,7 +310,7 @@ static void aliasguid_query_handler(int status,
if (status) {
pr_debug("(port: %d) failed: status = %d\n",
cb_ctx->port, status);
- rec->time_to_run = ktime_get_boot_ns() + 1 * NSEC_PER_SEC;
+ rec->time_to_run = ktime_get_boottime_ns() + 1 * NSEC_PER_SEC;
goto out;
}
@@ -416,7 +416,7 @@ next_entry:
be64_to_cpu((__force __be64)rec->guid_indexes),
be64_to_cpu((__force __be64)applied_guid_indexes),
be64_to_cpu((__force __be64)declined_guid_indexes));
- rec->time_to_run = ktime_get_boot_ns() +
+ rec->time_to_run = ktime_get_boottime_ns() +
resched_delay_sec * NSEC_PER_SEC;
} else {
rec->status = MLX4_GUID_INFO_STATUS_SET;
@@ -709,7 +709,7 @@ static int get_low_record_time_index(struct mlx4_ib_dev *dev, u8 port,
}
}
if (resched_delay_sec) {
- u64 curr_time = ktime_get_boot_ns();
+ u64 curr_time = ktime_get_boottime_ns();
*resched_delay_sec = (low_record_time < curr_time) ? 0 :
div_u64((low_record_time - curr_time), NSEC_PER_SEC);
diff --git a/drivers/leds/trigger/ledtrig-activity.c b/drivers/leds/trigger/ledtrig-activity.c
index 4c8b0c3cf284..6a72b7e13719 100644
--- a/drivers/leds/trigger/ledtrig-activity.c
+++ b/drivers/leds/trigger/ledtrig-activity.c
@@ -70,7 +70,7 @@ static void led_activity_function(struct timer_list *t)
* down to 16us, ensuring we won't overflow 32-bit computations below
* even up to 3k CPUs, while keeping divides cheap on smaller systems.
*/
- curr_boot = ktime_get_boot_ns() * cpus;
+ curr_boot = ktime_get_boottime_ns() * cpus;
diff_boot = (curr_boot - activity_data->last_boot) >> 16;
diff_used = (curr_used - activity_data->last_used) >> 16;
activity_data->last_boot = curr_boot;
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c b/drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c
index fec38a47696e..9f4b117db9d7 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c
@@ -93,7 +93,7 @@ void iwl_mvm_ftm_restart(struct iwl_mvm *mvm)
struct cfg80211_pmsr_result result = {
.status = NL80211_PMSR_STATUS_FAILURE,
.final = 1,
- .host_time = ktime_get_boot_ns(),
+ .host_time = ktime_get_boottime_ns(),
.type = NL80211_PMSR_TYPE_FTM,
};
int i;
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rx.c b/drivers/net/wireless/intel/iwlwifi/mvm/rx.c
index fbd3014e8b82..160b0db27103 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rx.c
@@ -555,7 +555,7 @@ void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
ieee80211_is_probe_resp(hdr->frame_control)))
- rx_status->boottime_ns = ktime_get_boot_ns();
+ rx_status->boottime_ns = ktime_get_boottime_ns();
/* Take a reference briefly to kick off a d0i3 entry delay so
* we can handle bursts of RX packets without toggling the
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index 1824566d08fc..64f950501287 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -1684,7 +1684,7 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
ieee80211_is_probe_resp(hdr->frame_control)))
- rx_status->boottime_ns = ktime_get_boot_ns();
+ rx_status->boottime_ns = ktime_get_boottime_ns();
}
if (iwl_mvm_create_skb(mvm, skb, hdr, len, crypt_len, rxb)) {
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
index cc56ab88fb43..72cd5b3f2d8d 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
@@ -1445,7 +1445,7 @@ void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, u32 *gp2, u64 *boottime)
}
*gp2 = iwl_mvm_get_systime(mvm);
- *boottime = ktime_get_boot_ns();
+ *boottime = ktime_get_boottime_ns();
if (!ps_disabled) {
mvm->ps_disabled = ps_disabled;
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 1c699a9fa866..a7bf6519d7aa 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -1271,7 +1271,7 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
*/
if (ieee80211_is_beacon(hdr->frame_control) ||
ieee80211_is_probe_resp(hdr->frame_control)) {
- rx_status.boottime_ns = ktime_get_boot_ns();
+ rx_status.boottime_ns = ktime_get_boottime_ns();
now = data->abs_bcn_ts;
} else {
now = mac80211_hwsim_get_tsf_raw();
diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c
index c9a485ecee7b..b74dc8bc9755 100644
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -483,7 +483,7 @@ static int wlcore_fw_status(struct wl1271 *wl, struct wl_fw_status *status)
}
/* update the host-chipset time offset */
- wl->time_offset = (ktime_get_boot_ns() >> 10) -
+ wl->time_offset = (ktime_get_boottime_ns() >> 10) -
(s64)(status->fw_localtime);
wl->fw_fast_lnk_map = status->link_fast_bitmap;
diff --git a/drivers/net/wireless/ti/wlcore/rx.c b/drivers/net/wireless/ti/wlcore/rx.c
index d96bb602fae6..307fab21050b 100644
--- a/drivers/net/wireless/ti/wlcore/rx.c
+++ b/drivers/net/wireless/ti/wlcore/rx.c
@@ -93,7 +93,7 @@ static void wl1271_rx_status(struct wl1271 *wl,
}
if (beacon || probe_rsp)
- status->boottime_ns = ktime_get_boot_ns();
+ status->boottime_ns = ktime_get_boottime_ns();
if (beacon)
wlcore_set_pending_regdomain_ch(wl, (u16)desc->channel,
diff --git a/drivers/net/wireless/ti/wlcore/tx.c b/drivers/net/wireless/ti/wlcore/tx.c
index 057c6be330e7..90e56d4c3df3 100644
--- a/drivers/net/wireless/ti/wlcore/tx.c
+++ b/drivers/net/wireless/ti/wlcore/tx.c
@@ -273,7 +273,7 @@ static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
}
/* configure packet life time */
- hosttime = (ktime_get_boot_ns() >> 10);
+ hosttime = (ktime_get_boottime_ns() >> 10);
desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
is_dummy = wl12xx_is_dummy_packet(wl, skb);
diff --git a/drivers/net/wireless/virt_wifi.c b/drivers/net/wireless/virt_wifi.c
index 606999f102eb..be92e1220284 100644
--- a/drivers/net/wireless/virt_wifi.c
+++ b/drivers/net/wireless/virt_wifi.c
@@ -172,7 +172,7 @@ static void virt_wifi_scan_result(struct work_struct *work)
informed_bss = cfg80211_inform_bss(wiphy, &channel_5ghz,
CFG80211_BSS_FTYPE_PRESP,
fake_router_bssid,
- ktime_get_boot_ns(),
+ ktime_get_boottime_ns(),
WLAN_CAPABILITY_ESS, 0,
(void *)&ssid, sizeof(ssid),
DBM_TO_MBM(-50), GFP_KERNEL);
diff --git a/include/asm-generic/vdso/vsyscall.h b/include/asm-generic/vdso/vsyscall.h
new file mode 100644
index 000000000000..e94b19782c92
--- /dev/null
+++ b/include/asm-generic/vdso/vsyscall.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_GENERIC_VSYSCALL_H
+#define __ASM_GENERIC_VSYSCALL_H
+
+#ifndef __ASSEMBLY__
+
+#ifndef __arch_get_k_vdso_data
+static __always_inline struct vdso_data *__arch_get_k_vdso_data(void)
+{
+ return NULL;
+}
+#endif /* __arch_get_k_vdso_data */
+
+#ifndef __arch_update_vdso_data
+static __always_inline int __arch_update_vdso_data(void)
+{
+ return 0;
+}
+#endif /* __arch_update_vdso_data */
+
+#ifndef __arch_get_clock_mode
+static __always_inline int __arch_get_clock_mode(struct timekeeper *tk)
+{
+ return 0;
+}
+#endif /* __arch_get_clock_mode */
+
+#ifndef __arch_use_vsyscall
+static __always_inline int __arch_use_vsyscall(struct vdso_data *vdata)
+{
+ return 1;
+}
+#endif /* __arch_use_vsyscall */
+
+#ifndef __arch_update_vsyscall
+static __always_inline void __arch_update_vsyscall(struct vdso_data *vdata,
+ struct timekeeper *tk)
+{
+}
+#endif /* __arch_update_vsyscall */
+
+#ifndef __arch_sync_vdso_data
+static __always_inline void __arch_sync_vdso_data(struct vdso_data *vdata)
+{
+}
+#endif /* __arch_sync_vdso_data */
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_GENERIC_VSYSCALL_H */
diff --git a/include/clocksource/hyperv_timer.h b/include/clocksource/hyperv_timer.h
new file mode 100644
index 000000000000..a821deb8ecb2
--- /dev/null
+++ b/include/clocksource/hyperv_timer.h
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/*
+ * Definitions for the clocksource provided by the Hyper-V
+ * hypervisor to guest VMs, as described in the Hyper-V Top
+ * Level Functional Spec (TLFS).
+ *
+ * Copyright (C) 2019, Microsoft, Inc.
+ *
+ * Author: Michael Kelley <mikelley@microsoft.com>
+ */
+
+#ifndef __CLKSOURCE_HYPERV_TIMER_H
+#define __CLKSOURCE_HYPERV_TIMER_H
+
+#include <linux/clocksource.h>
+#include <linux/math64.h>
+#include <asm/mshyperv.h>
+
+#define HV_MAX_MAX_DELTA_TICKS 0xffffffff
+#define HV_MIN_DELTA_TICKS 1
+
+/* Routines called by the VMbus driver */
+extern int hv_stimer_alloc(int sint);
+extern void hv_stimer_free(void);
+extern void hv_stimer_init(unsigned int cpu);
+extern void hv_stimer_cleanup(unsigned int cpu);
+extern void hv_stimer_global_cleanup(void);
+extern void hv_stimer0_isr(void);
+
+#if IS_ENABLED(CONFIG_HYPERV)
+extern struct clocksource *hyperv_cs;
+extern void hv_init_clocksource(void);
+#endif /* CONFIG_HYPERV */
+
+#ifdef CONFIG_HYPERV_TSCPAGE
+extern struct ms_hyperv_tsc_page *hv_get_tsc_page(void);
+
+static inline notrace u64
+hv_read_tsc_page_tsc(const struct ms_hyperv_tsc_page *tsc_pg, u64 *cur_tsc)
+{
+ u64 scale, offset;
+ u32 sequence;
+
+ /*
+ * The protocol for reading Hyper-V TSC page is specified in Hypervisor
+ * Top-Level Functional Specification ver. 3.0 and above. To get the
+ * reference time we must do the following:
+ * - READ ReferenceTscSequence
+ * A special '0' value indicates the time source is unreliable and we
+ * need to use something else. The currently published specification
+ * versions (up to 4.0b) contain a mistake and wrongly claim '-1'
+ * instead of '0' as the special value, see commit c35b82ef0294.
+ * - ReferenceTime =
+ * ((RDTSC() * ReferenceTscScale) >> 64) + ReferenceTscOffset
+ * - READ ReferenceTscSequence again. In case its value has changed
+ * since our first reading we need to discard ReferenceTime and repeat
+ * the whole sequence as the hypervisor was updating the page in
+ * between.
+ */
+ do {
+ sequence = READ_ONCE(tsc_pg->tsc_sequence);
+ if (!sequence)
+ return U64_MAX;
+ /*
+ * Make sure we read sequence before we read other values from
+ * TSC page.
+ */
+ smp_rmb();
+
+ scale = READ_ONCE(tsc_pg->tsc_scale);
+ offset = READ_ONCE(tsc_pg->tsc_offset);
+ *cur_tsc = hv_get_raw_timer();
+
+ /*
+ * Make sure we read sequence after we read all other values
+ * from TSC page.
+ */
+ smp_rmb();
+
+ } while (READ_ONCE(tsc_pg->tsc_sequence) != sequence);
+
+ return mul_u64_u64_shr(*cur_tsc, scale, 64) + offset;
+}
+
+static inline notrace u64
+hv_read_tsc_page(const struct ms_hyperv_tsc_page *tsc_pg)
+{
+ u64 cur_tsc;
+
+ return hv_read_tsc_page_tsc(tsc_pg, &cur_tsc);
+}
+
+#else /* CONFIG_HYPERV_TSC_PAGE */
+static inline struct ms_hyperv_tsc_page *hv_get_tsc_page(void)
+{
+ return NULL;
+}
+
+static inline u64 hv_read_tsc_page_tsc(const struct ms_hyperv_tsc_page *tsc_pg,
+ u64 *cur_tsc)
+{
+ return U64_MAX;
+}
+#endif /* CONFIG_HYPERV_TSCPAGE */
+
+#endif
diff --git a/include/clocksource/timer-davinci.h b/include/clocksource/timer-davinci.h
new file mode 100644
index 000000000000..1dcc1333fbc8
--- /dev/null
+++ b/include/clocksource/timer-davinci.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * TI DaVinci clocksource driver
+ *
+ * Copyright (C) 2019 Texas Instruments
+ * Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+ */
+
+#ifndef __TIMER_DAVINCI_H__
+#define __TIMER_DAVINCI_H__
+
+#include <linux/clk.h>
+#include <linux/ioport.h>
+
+enum {
+ DAVINCI_TIMER_CLOCKEVENT_IRQ,
+ DAVINCI_TIMER_CLOCKSOURCE_IRQ,
+ DAVINCI_TIMER_NUM_IRQS,
+};
+
+/**
+ * struct davinci_timer_cfg - davinci clocksource driver configuration struct
+ * @reg: register range resource
+ * @irq: clockevent and clocksource interrupt resources
+ * @cmp_off: if set - it specifies the compare register used for clockevent
+ *
+ * Note: if the compare register is specified, the driver will use the bottom
+ * clock half for both clocksource and clockevent and the compare register
+ * to generate event irqs. The user must supply the correct compare register
+ * interrupt number.
+ *
+ * This is only used by da830 the DSP of which uses the top half. The timer
+ * driver still configures the top half to run in free-run mode.
+ */
+struct davinci_timer_cfg {
+ struct resource reg;
+ struct resource irq[DAVINCI_TIMER_NUM_IRQS];
+ unsigned int cmp_off;
+};
+
+int __init davinci_timer_register(struct clk *clk,
+ const struct davinci_timer_cfg *data);
+
+#endif /* __TIMER_DAVINCI_H__ */
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index 5c6062206760..87c211adf49e 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -116,10 +116,10 @@ enum cpuhp_state {
CPUHP_AP_PERF_ARM_ACPI_STARTING,
CPUHP_AP_PERF_ARM_STARTING,
CPUHP_AP_ARM_L2X0_STARTING,
+ CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
CPUHP_AP_ARM_ARCH_TIMER_STARTING,
CPUHP_AP_ARM_GLOBAL_TIMER_STARTING,
CPUHP_AP_JCORE_TIMER_STARTING,
- CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
CPUHP_AP_ARM_TWD_STARTING,
CPUHP_AP_QCOM_TIMER_STARTING,
CPUHP_AP_TEGRA_TIMER_STARTING,
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 2e8957eac4d4..4971100a8cab 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -12,8 +12,8 @@
#ifndef _LINUX_HRTIMER_H
#define _LINUX_HRTIMER_H
+#include <linux/hrtimer_defs.h>
#include <linux/rbtree.h>
-#include <linux/ktime.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/percpu.h>
@@ -298,26 +298,12 @@ struct clock_event_device;
extern void hrtimer_interrupt(struct clock_event_device *dev);
-/*
- * The resolution of the clocks. The resolution value is returned in
- * the clock_getres() system call to give application programmers an
- * idea of the (in)accuracy of timers. Timer values are rounded up to
- * this resolution values.
- */
-# define HIGH_RES_NSEC 1
-# define KTIME_HIGH_RES (HIGH_RES_NSEC)
-# define MONOTONIC_RES_NSEC HIGH_RES_NSEC
-# define KTIME_MONOTONIC_RES KTIME_HIGH_RES
-
extern void clock_was_set_delayed(void);
extern unsigned int hrtimer_resolution;
#else
-# define MONOTONIC_RES_NSEC LOW_RES_NSEC
-# define KTIME_MONOTONIC_RES KTIME_LOW_RES
-
#define hrtimer_resolution (unsigned int)LOW_RES_NSEC
static inline void clock_was_set_delayed(void) { }
diff --git a/include/linux/hrtimer_defs.h b/include/linux/hrtimer_defs.h
new file mode 100644
index 000000000000..2d3e3c5fb946
--- /dev/null
+++ b/include/linux/hrtimer_defs.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_HRTIMER_DEFS_H
+#define _LINUX_HRTIMER_DEFS_H
+
+#include <linux/ktime.h>
+
+#ifdef CONFIG_HIGH_RES_TIMERS
+
+/*
+ * The resolution of the clocks. The resolution value is returned in
+ * the clock_getres() system call to give application programmers an
+ * idea of the (in)accuracy of timers. Timer values are rounded up to
+ * this resolution values.
+ */
+# define HIGH_RES_NSEC 1
+# define KTIME_HIGH_RES (HIGH_RES_NSEC)
+# define MONOTONIC_RES_NSEC HIGH_RES_NSEC
+# define KTIME_MONOTONIC_RES KTIME_HIGH_RES
+
+#else
+
+# define MONOTONIC_RES_NSEC LOW_RES_NSEC
+# define KTIME_MONOTONIC_RES KTIME_LOW_RES
+
+#endif
+
+#endif
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index a8ab0f143ac4..b27e2ffa96c1 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -113,6 +113,34 @@ static inline ktime_t ktime_get_coarse_clocktai(void)
return ktime_get_coarse_with_offset(TK_OFFS_TAI);
}
+static inline ktime_t ktime_get_coarse(void)
+{
+ struct timespec64 ts;
+
+ ktime_get_coarse_ts64(&ts);
+ return timespec64_to_ktime(ts);
+}
+
+static inline u64 ktime_get_coarse_ns(void)
+{
+ return ktime_to_ns(ktime_get_coarse());
+}
+
+static inline u64 ktime_get_coarse_real_ns(void)
+{
+ return ktime_to_ns(ktime_get_coarse_real());
+}
+
+static inline u64 ktime_get_coarse_boottime_ns(void)
+{
+ return ktime_to_ns(ktime_get_coarse_boottime());
+}
+
+static inline u64 ktime_get_coarse_clocktai_ns(void)
+{
+ return ktime_to_ns(ktime_get_coarse_clocktai());
+}
+
/**
* ktime_mono_to_real - Convert monotonic time to clock realtime
*/
@@ -131,12 +159,12 @@ static inline u64 ktime_get_real_ns(void)
return ktime_to_ns(ktime_get_real());
}
-static inline u64 ktime_get_boot_ns(void)
+static inline u64 ktime_get_boottime_ns(void)
{
return ktime_to_ns(ktime_get_boottime());
}
-static inline u64 ktime_get_tai_ns(void)
+static inline u64 ktime_get_clocktai_ns(void)
{
return ktime_to_ns(ktime_get_clocktai());
}
diff --git a/include/linux/timer.h b/include/linux/timer.h
index 7b066fd38248..282e4f2a532a 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -36,19 +36,30 @@ struct timer_list {
#define __TIMER_LOCKDEP_MAP_INITIALIZER(_kn)
#endif
-/*
- * A deferrable timer will work normally when the system is busy, but
- * will not cause a CPU to come out of idle just to service it; instead,
- * the timer will be serviced when the CPU eventually wakes up with a
- * subsequent non-deferrable timer.
+/**
+ * @TIMER_DEFERRABLE: A deferrable timer will work normally when the
+ * system is busy, but will not cause a CPU to come out of idle just
+ * to service it; instead, the timer will be serviced when the CPU
+ * eventually wakes up with a subsequent non-deferrable timer.
*
- * An irqsafe timer is executed with IRQ disabled and it's safe to wait for
- * the completion of the running instance from IRQ handlers, for example,
- * by calling del_timer_sync().
+ * @TIMER_IRQSAFE: An irqsafe timer is executed with IRQ disabled and
+ * it's safe to wait for the completion of the running instance from
+ * IRQ handlers, for example, by calling del_timer_sync().
*
* Note: The irq disabled callback execution is a special case for
* workqueue locking issues. It's not meant for executing random crap
* with interrupts disabled. Abuse is monitored!
+ *
+ * @TIMER_PINNED: A pinned timer will not be affected by any timer
+ * placement heuristics (like, NOHZ) and will always expire on the CPU
+ * on which the timer was enqueued.
+ *
+ * Note: Because enqueuing of timers can migrate the timer from one
+ * CPU to another, pinned timers are not guaranteed to stay on the
+ * initialy selected CPU. They move to the CPU on which the enqueue
+ * function is invoked via mod_timer() or add_timer(). If the timer
+ * should be placed on a particular CPU, then add_timer_on() has to be
+ * used.
*/
#define TIMER_CPUMASK 0x0003FFFF
#define TIMER_MIGRATING 0x00040000
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 8fb5be3ca0ca..1fce25b1d87f 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -2007,7 +2007,7 @@ enum cfg80211_signal_type {
* received by the device (not just by the host, in case it was
* buffered on the device) and be accurate to about 10ms.
* If the frame isn't buffered, just passing the return value of
- * ktime_get_boot_ns() is likely appropriate.
+ * ktime_get_boottime_ns() is likely appropriate.
* @parent_tsf: the time at the start of reception of the first octet of the
* timestamp field of the frame. The time is the TSF of the BSS specified
* by %parent_bssid.
diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h
new file mode 100644
index 000000000000..2e302c0f41f7
--- /dev/null
+++ b/include/vdso/datapage.h
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __VDSO_DATAPAGE_H
+#define __VDSO_DATAPAGE_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/bits.h>
+#include <linux/time.h>
+#include <linux/types.h>
+
+#define VDSO_BASES (CLOCK_TAI + 1)
+#define VDSO_HRES (BIT(CLOCK_REALTIME) | \
+ BIT(CLOCK_MONOTONIC) | \
+ BIT(CLOCK_BOOTTIME) | \
+ BIT(CLOCK_TAI))
+#define VDSO_COARSE (BIT(CLOCK_REALTIME_COARSE) | \
+ BIT(CLOCK_MONOTONIC_COARSE))
+#define VDSO_RAW (BIT(CLOCK_MONOTONIC_RAW))
+
+#define CS_HRES_COARSE 0
+#define CS_RAW 1
+#define CS_BASES (CS_RAW + 1)
+
+/**
+ * struct vdso_timestamp - basetime per clock_id
+ * @sec: seconds
+ * @nsec: nanoseconds
+ *
+ * There is one vdso_timestamp object in vvar for each vDSO-accelerated
+ * clock_id. For high-resolution clocks, this encodes the time
+ * corresponding to vdso_data.cycle_last. For coarse clocks this encodes
+ * the actual time.
+ *
+ * To be noticed that for highres clocks nsec is left-shifted by
+ * vdso_data.cs[x].shift.
+ */
+struct vdso_timestamp {
+ u64 sec;
+ u64 nsec;
+};
+
+/**
+ * struct vdso_data - vdso datapage representation
+ * @seq: timebase sequence counter
+ * @clock_mode: clock mode
+ * @cycle_last: timebase at clocksource init
+ * @mask: clocksource mask
+ * @mult: clocksource multiplier
+ * @shift: clocksource shift
+ * @basetime[clock_id]: basetime per clock_id
+ * @tz_minuteswest: minutes west of Greenwich
+ * @tz_dsttime: type of DST correction
+ * @hrtimer_res: hrtimer resolution
+ * @__unused: unused
+ *
+ * vdso_data will be accessed by 64 bit and compat code at the same time
+ * so we should be careful before modifying this structure.
+ */
+struct vdso_data {
+ u32 seq;
+
+ s32 clock_mode;
+ u64 cycle_last;
+ u64 mask;
+ u32 mult;
+ u32 shift;
+
+ struct vdso_timestamp basetime[VDSO_BASES];
+
+ s32 tz_minuteswest;
+ s32 tz_dsttime;
+ u32 hrtimer_res;
+ u32 __unused;
+};
+
+/*
+ * We use the hidden visibility to prevent the compiler from generating a GOT
+ * relocation. Not only is going through a GOT useless (the entry couldn't and
+ * must not be overridden by another library), it does not even work: the linker
+ * cannot generate an absolute address to the data page.
+ *
+ * With the hidden visibility, the compiler simply generates a PC-relative
+ * relocation, and this is what we need.
+ */
+extern struct vdso_data _vdso_data[CS_BASES] __attribute__((visibility("hidden")));
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __VDSO_DATAPAGE_H */
diff --git a/include/vdso/helpers.h b/include/vdso/helpers.h
new file mode 100644
index 000000000000..01641dbb68ef
--- /dev/null
+++ b/include/vdso/helpers.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __VDSO_HELPERS_H
+#define __VDSO_HELPERS_H
+
+#ifndef __ASSEMBLY__
+
+#include <vdso/datapage.h>
+
+static __always_inline u32 vdso_read_begin(const struct vdso_data *vd)
+{
+ u32 seq;
+
+ while ((seq = READ_ONCE(vd->seq)) & 1)
+ cpu_relax();
+
+ smp_rmb();
+ return seq;
+}
+
+static __always_inline u32 vdso_read_retry(const struct vdso_data *vd,
+ u32 start)
+{
+ u32 seq;
+
+ smp_rmb();
+ seq = READ_ONCE(vd->seq);
+ return seq != start;
+}
+
+static __always_inline void vdso_write_begin(struct vdso_data *vd)
+{
+ /*
+ * WRITE_ONCE it is required otherwise the compiler can validly tear
+ * updates to vd[x].seq and it is possible that the value seen by the
+ * reader it is inconsistent.
+ */
+ WRITE_ONCE(vd[CS_HRES_COARSE].seq, vd[CS_HRES_COARSE].seq + 1);
+ WRITE_ONCE(vd[CS_RAW].seq, vd[CS_RAW].seq + 1);
+ smp_wmb();
+}
+
+static __always_inline void vdso_write_end(struct vdso_data *vd)
+{
+ smp_wmb();
+ /*
+ * WRITE_ONCE it is required otherwise the compiler can validly tear
+ * updates to vd[x].seq and it is possible that the value seen by the
+ * reader it is inconsistent.
+ */
+ WRITE_ONCE(vd[CS_HRES_COARSE].seq, vd[CS_HRES_COARSE].seq + 1);
+ WRITE_ONCE(vd[CS_RAW].seq, vd[CS_RAW].seq + 1);
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __VDSO_HELPERS_H */
diff --git a/include/vdso/vsyscall.h b/include/vdso/vsyscall.h
new file mode 100644
index 000000000000..2c6134e0c23d
--- /dev/null
+++ b/include/vdso/vsyscall.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __VDSO_VSYSCALL_H
+#define __VDSO_VSYSCALL_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/vdso/vsyscall.h>
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __VDSO_VSYSCALL_H */
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 42d17f730780..5b30f8baaf02 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -1668,7 +1668,7 @@ static int bpf_prog_load(union bpf_attr *attr, union bpf_attr __user *uattr)
if (err < 0)
goto free_prog;
- prog->aux->load_time = ktime_get_boot_ns();
+ prog->aux->load_time = ktime_get_boottime_ns();
err = bpf_obj_name_cpy(prog->aux->name, attr->prog_name);
if (err)
goto free_prog;
diff --git a/kernel/events/core.c b/kernel/events/core.c
index f85929ce13be..29e5f7880a4b 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -10693,11 +10693,11 @@ static int perf_event_set_clock(struct perf_event *event, clockid_t clk_id)
break;
case CLOCK_BOOTTIME:
- event->clock = &ktime_get_boot_ns;
+ event->clock = &ktime_get_boottime_ns;
break;
case CLOCK_TAI:
- event->clock = &ktime_get_tai_ns;
+ event->clock = &ktime_get_clocktai_ns;
break;
default:
diff --git a/kernel/fork.c b/kernel/fork.c
index fe83343da24b..a83ef7243ccc 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2117,7 +2117,7 @@ static __latent_entropy struct task_struct *copy_process(
*/
p->start_time = ktime_get_ns();
- p->real_start_time = ktime_get_boot_ns();
+ p->real_start_time = ktime_get_boottime_ns();
/*
* Make it visible to the rest of the system, but dont wake it up yet.
diff --git a/kernel/time/Makefile b/kernel/time/Makefile
index f1e46f338a9c..1867044800bb 100644
--- a/kernel/time/Makefile
+++ b/kernel/time/Makefile
@@ -16,5 +16,6 @@ ifeq ($(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST),y)
endif
obj-$(CONFIG_GENERIC_SCHED_CLOCK) += sched_clock.o
obj-$(CONFIG_TICK_ONESHOT) += tick-oneshot.o tick-sched.o
+obj-$(CONFIG_HAVE_GENERIC_VDSO) += vsyscall.o
obj-$(CONFIG_DEBUG_FS) += timekeeping_debug.o
obj-$(CONFIG_TEST_UDELAY) += test_udelay.o
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 0519a8805aab..57518efc3810 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -233,7 +233,6 @@ EXPORT_SYMBOL_GPL(alarm_expires_remaining);
/**
* alarmtimer_suspend - Suspend time callback
* @dev: unused
- * @state: unused
*
* When we are going into suspend, we look through the bases
* to see which is the soonest timer to expire. We then
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 3bcc19ceb073..fff5f64981c6 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -105,12 +105,12 @@ static DEFINE_SPINLOCK(watchdog_lock);
static int watchdog_running;
static atomic_t watchdog_reset_pending;
-static void inline clocksource_watchdog_lock(unsigned long *flags)
+static inline void clocksource_watchdog_lock(unsigned long *flags)
{
spin_lock_irqsave(&watchdog_lock, *flags);
}
-static void inline clocksource_watchdog_unlock(unsigned long *flags)
+static inline void clocksource_watchdog_unlock(unsigned long *flags)
{
spin_unlock_irqrestore(&watchdog_lock, *flags);
}
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 41dfff23c1f9..5ee77f1a8a92 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -30,7 +30,6 @@
#include <linux/syscalls.h>
#include <linux/interrupt.h>
#include <linux/tick.h>
-#include <linux/seq_file.h>
#include <linux/err.h>
#include <linux/debugobjects.h>
#include <linux/sched/signal.h>
@@ -1115,9 +1114,10 @@ EXPORT_SYMBOL_GPL(hrtimer_start_range_ns);
* @timer: hrtimer to stop
*
* Returns:
- * 0 when the timer was not active
- * 1 when the timer was active
- * -1 when the timer is currently executing the callback function and
+ *
+ * * 0 when the timer was not active
+ * * 1 when the timer was active
+ * * -1 when the timer is currently executing the callback function and
* cannot be stopped
*/
int hrtimer_try_to_cancel(struct hrtimer *timer)
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 8de4f789dc1b..65eb796610dc 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -43,6 +43,7 @@ static u64 tick_length_base;
#define MAX_TICKADJ 500LL /* usecs */
#define MAX_TICKADJ_SCALED \
(((MAX_TICKADJ * NSEC_PER_USEC) << NTP_SCALE_SHIFT) / NTP_INTERVAL_FREQ)
+#define MAX_TAI_OFFSET 100000
/*
* phase-lock loop variables
@@ -691,7 +692,8 @@ static inline void process_adjtimex_modes(const struct __kernel_timex *txc,
time_constant = max(time_constant, 0l);
}
- if (txc->modes & ADJ_TAI && txc->constant >= 0)
+ if (txc->modes & ADJ_TAI &&
+ txc->constant >= 0 && txc->constant <= MAX_TAI_OFFSET)
*time_tai = txc->constant;
if (txc->modes & ADJ_OFFSET)
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index 29176635991f..d7f2d91acdac 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -980,23 +980,16 @@ retry_delete:
*/
static void itimer_delete(struct k_itimer *timer)
{
- unsigned long flags;
-
retry_delete:
- spin_lock_irqsave(&timer->it_lock, flags);
+ spin_lock_irq(&timer->it_lock);
if (timer_delete_hook(timer) == TIMER_RETRY) {
- unlock_timer(timer, flags);
+ spin_unlock_irq(&timer->it_lock);
goto retry_delete;
}
list_del(&timer->list);
- /*
- * This keeps any tasks waiting on the spin lock from thinking
- * they got something (see the lock code above).
- */
- timer->it_signal = NULL;
- unlock_timer(timer, flags);
+ spin_unlock_irq(&timer->it_lock);
release_posix_timer(timer, IT_ID_SET);
}
diff --git a/kernel/time/time.c b/kernel/time/time.c
index 7f7d6914ddd5..5c54ca632d08 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -251,6 +251,10 @@ COMPAT_SYSCALL_DEFINE2(settimeofday, struct old_timeval32 __user *, tv,
if (tv) {
if (compat_get_timeval(&user_tv, tv))
return -EFAULT;
+
+ if (!timeval_valid(&user_tv))
+ return -EINVAL;
+
new_ts.tv_sec = user_tv.tv_sec;
new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC;
}
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 44b726bab4bd..d911c8470149 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -819,7 +819,7 @@ ktime_t ktime_get_coarse_with_offset(enum tk_offsets offs)
} while (read_seqcount_retry(&tk_core.seq, seq));
- return base + nsecs;
+ return ktime_add_ns(base, nsecs);
}
EXPORT_SYMBOL_GPL(ktime_get_coarse_with_offset);
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index 98ba50dcb1b2..acb326f5f50a 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -282,23 +282,6 @@ static inline void timer_list_header(struct seq_file *m, u64 now)
SEQ_printf(m, "\n");
}
-static int timer_list_show(struct seq_file *m, void *v)
-{
- struct timer_list_iter *iter = v;
-
- if (iter->cpu == -1 && !iter->second_pass)
- timer_list_header(m, iter->now);
- else if (!iter->second_pass)
- print_cpu(m, iter->cpu, iter->now);
-#ifdef CONFIG_GENERIC_CLOCKEVENTS
- else if (iter->cpu == -1 && iter->second_pass)
- timer_list_show_tickdevices_header(m);
- else
- print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu);
-#endif
- return 0;
-}
-
void sysrq_timer_list_show(void)
{
u64 now = ktime_to_ns(ktime_get());
@@ -317,6 +300,24 @@ void sysrq_timer_list_show(void)
return;
}
+#ifdef CONFIG_PROC_FS
+static int timer_list_show(struct seq_file *m, void *v)
+{
+ struct timer_list_iter *iter = v;
+
+ if (iter->cpu == -1 && !iter->second_pass)
+ timer_list_header(m, iter->now);
+ else if (!iter->second_pass)
+ print_cpu(m, iter->cpu, iter->now);
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
+ else if (iter->cpu == -1 && iter->second_pass)
+ timer_list_show_tickdevices_header(m);
+ else
+ print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu);
+#endif
+ return 0;
+}
+
static void *move_iter(struct timer_list_iter *iter, loff_t offset)
{
for (; offset; offset--) {
@@ -376,3 +377,4 @@ static int __init init_timer_list_procfs(void)
return 0;
}
__initcall(init_timer_list_procfs);
+#endif
diff --git a/kernel/time/vsyscall.c b/kernel/time/vsyscall.c
new file mode 100644
index 000000000000..a80893180826
--- /dev/null
+++ b/kernel/time/vsyscall.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2019 ARM Ltd.
+ *
+ * Generic implementation of update_vsyscall and update_vsyscall_tz.
+ *
+ * Based on the x86 specific implementation.
+ */
+
+#include <linux/hrtimer.h>
+#include <linux/timekeeper_internal.h>
+#include <vdso/datapage.h>
+#include <vdso/helpers.h>
+#include <vdso/vsyscall.h>
+
+static inline void update_vdso_data(struct vdso_data *vdata,
+ struct timekeeper *tk)
+{
+ struct vdso_timestamp *vdso_ts;
+ u64 nsec;
+
+ vdata[CS_HRES_COARSE].cycle_last = tk->tkr_mono.cycle_last;
+ vdata[CS_HRES_COARSE].mask = tk->tkr_mono.mask;
+ vdata[CS_HRES_COARSE].mult = tk->tkr_mono.mult;
+ vdata[CS_HRES_COARSE].shift = tk->tkr_mono.shift;
+ vdata[CS_RAW].cycle_last = tk->tkr_raw.cycle_last;
+ vdata[CS_RAW].mask = tk->tkr_raw.mask;
+ vdata[CS_RAW].mult = tk->tkr_raw.mult;
+ vdata[CS_RAW].shift = tk->tkr_raw.shift;
+
+ /* CLOCK_REALTIME */
+ vdso_ts = &vdata[CS_HRES_COARSE].basetime[CLOCK_REALTIME];
+ vdso_ts->sec = tk->xtime_sec;
+ vdso_ts->nsec = tk->tkr_mono.xtime_nsec;
+
+ /* CLOCK_MONOTONIC */
+ vdso_ts = &vdata[CS_HRES_COARSE].basetime[CLOCK_MONOTONIC];
+ vdso_ts->sec = tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
+
+ nsec = tk->tkr_mono.xtime_nsec;
+ nsec += ((u64)tk->wall_to_monotonic.tv_nsec << tk->tkr_mono.shift);
+ while (nsec >= (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift)) {
+ nsec -= (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift);
+ vdso_ts->sec++;
+ }
+ vdso_ts->nsec = nsec;
+
+ /* CLOCK_MONOTONIC_RAW */
+ vdso_ts = &vdata[CS_RAW].basetime[CLOCK_MONOTONIC_RAW];
+ vdso_ts->sec = tk->raw_sec;
+ vdso_ts->nsec = tk->tkr_raw.xtime_nsec;
+
+ /* CLOCK_BOOTTIME */
+ vdso_ts = &vdata[CS_HRES_COARSE].basetime[CLOCK_BOOTTIME];
+ vdso_ts->sec = tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
+ nsec = tk->tkr_mono.xtime_nsec;
+ nsec += ((u64)(tk->wall_to_monotonic.tv_nsec +
+ ktime_to_ns(tk->offs_boot)) << tk->tkr_mono.shift);
+ while (nsec >= (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift)) {
+ nsec -= (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift);
+ vdso_ts->sec++;
+ }
+ vdso_ts->nsec = nsec;
+
+ /* CLOCK_TAI */
+ vdso_ts = &vdata[CS_HRES_COARSE].basetime[CLOCK_TAI];
+ vdso_ts->sec = tk->xtime_sec + (s64)tk->tai_offset;
+ vdso_ts->nsec = tk->tkr_mono.xtime_nsec;
+
+ /*
+ * Read without the seqlock held by clock_getres().
+ * Note: No need to have a second copy.
+ */
+ WRITE_ONCE(vdata[CS_HRES_COARSE].hrtimer_res, hrtimer_resolution);
+}
+
+void update_vsyscall(struct timekeeper *tk)
+{
+ struct vdso_data *vdata = __arch_get_k_vdso_data();
+ struct vdso_timestamp *vdso_ts;
+ u64 nsec;
+
+ if (__arch_update_vdso_data()) {
+ /*
+ * Some architectures might want to skip the update of the
+ * data page.
+ */
+ return;
+ }
+
+ /* copy vsyscall data */
+ vdso_write_begin(vdata);
+
+ vdata[CS_HRES_COARSE].clock_mode = __arch_get_clock_mode(tk);
+ vdata[CS_RAW].clock_mode = __arch_get_clock_mode(tk);
+
+ /* CLOCK_REALTIME_COARSE */
+ vdso_ts = &vdata[CS_HRES_COARSE].basetime[CLOCK_REALTIME_COARSE];
+ vdso_ts->sec = tk->xtime_sec;
+ vdso_ts->nsec = tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift;
+
+ /* CLOCK_MONOTONIC_COARSE */
+ vdso_ts = &vdata[CS_HRES_COARSE].basetime[CLOCK_MONOTONIC_COARSE];
+ vdso_ts->sec = tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
+ nsec = tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift;
+ nsec = nsec + tk->wall_to_monotonic.tv_nsec;
+ while (nsec >= NSEC_PER_SEC) {
+ nsec = nsec - NSEC_PER_SEC;
+ vdso_ts->sec++;
+ }
+ vdso_ts->nsec = nsec;
+
+ if (__arch_use_vsyscall(vdata))
+ update_vdso_data(vdata, tk);
+
+ __arch_update_vsyscall(vdata, tk);
+
+ vdso_write_end(vdata);
+
+ __arch_sync_vdso_data(vdata);
+}
+
+void update_vsyscall_tz(void)
+{
+ struct vdso_data *vdata = __arch_get_k_vdso_data();
+
+ if (__arch_use_vsyscall(vdata)) {
+ vdata[CS_HRES_COARSE].tz_minuteswest = sys_tz.tz_minuteswest;
+ vdata[CS_HRES_COARSE].tz_dsttime = sys_tz.tz_dsttime;
+ }
+
+ __arch_sync_vdso_data(vdata);
+}
diff --git a/lib/Kconfig b/lib/Kconfig
index 90623a0e1942..8c8eefc5e54c 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -576,6 +576,11 @@ config OID_REGISTRY
config UCS2_STRING
tristate
+#
+# generic vdso
+#
+source "lib/vdso/Kconfig"
+
source "lib/fonts/Kconfig"
config SG_SPLIT
diff --git a/lib/vdso/Kconfig b/lib/vdso/Kconfig
new file mode 100644
index 000000000000..cc00364bd2c2
--- /dev/null
+++ b/lib/vdso/Kconfig
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config HAVE_GENERIC_VDSO
+ bool
+
+if HAVE_GENERIC_VDSO
+
+config GENERIC_GETTIMEOFDAY
+ bool
+ help
+ This is a generic implementation of gettimeofday vdso.
+ Each architecture that enables this feature has to
+ provide the fallback implementation.
+
+config GENERIC_VDSO_32
+ bool
+ depends on GENERIC_GETTIMEOFDAY && !64BIT
+ help
+ This config option helps to avoid possible performance issues
+ in 32 bit only architectures.
+
+config GENERIC_COMPAT_VDSO
+ bool
+ help
+ This config option enables the compat VDSO layer.
+
+config CROSS_COMPILE_COMPAT_VDSO
+ string "32 bit Toolchain prefix for compat vDSO"
+ default ""
+ depends on GENERIC_COMPAT_VDSO
+ help
+ Defines the cross-compiler prefix for compiling compat vDSO.
+ If a 64 bit compiler (i.e. x86_64) can compile the VDSO for
+ 32 bit, it does not need to define this parameter.
+
+endif
diff --git a/lib/vdso/Makefile b/lib/vdso/Makefile
new file mode 100644
index 000000000000..c415a685d61b
--- /dev/null
+++ b/lib/vdso/Makefile
@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: GPL-2.0
+
+GENERIC_VDSO_MK_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
+GENERIC_VDSO_DIR := $(dir $(GENERIC_VDSO_MK_PATH))
+
+c-gettimeofday-$(CONFIG_GENERIC_GETTIMEOFDAY) := $(addprefix $(GENERIC_VDSO_DIR), gettimeofday.c)
+
+# This cmd checks that the vdso library does not contain absolute relocation
+# It has to be called after the linking of the vdso library and requires it
+# as a parameter.
+#
+# $(ARCH_REL_TYPE_ABS) is defined in the arch specific makefile and corresponds
+# to the absolute relocation types printed by "objdump -R" and accepted by the
+# dynamic linker.
+ifndef ARCH_REL_TYPE_ABS
+$(error ARCH_REL_TYPE_ABS is not set)
+endif
+
+quiet_cmd_vdso_check = VDSOCHK $@
+ cmd_vdso_check = if $(OBJDUMP) -R $@ | egrep -h "$(ARCH_REL_TYPE_ABS)"; \
+ then (echo >&2 "$@: dynamic relocations are not supported"; \
+ rm -f $@; /bin/false); fi
diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c
new file mode 100644
index 000000000000..2d1c1f241fd9
--- /dev/null
+++ b/lib/vdso/gettimeofday.c
@@ -0,0 +1,239 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generic userspace implementations of gettimeofday() and similar.
+ */
+#include <linux/compiler.h>
+#include <linux/math64.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/hrtimer_defs.h>
+#include <vdso/datapage.h>
+#include <vdso/helpers.h>
+
+/*
+ * The generic vDSO implementation requires that gettimeofday.h
+ * provides:
+ * - __arch_get_vdso_data(): to get the vdso datapage.
+ * - __arch_get_hw_counter(): to get the hw counter based on the
+ * clock_mode.
+ * - gettimeofday_fallback(): fallback for gettimeofday.
+ * - clock_gettime_fallback(): fallback for clock_gettime.
+ * - clock_getres_fallback(): fallback for clock_getres.
+ */
+#ifdef ENABLE_COMPAT_VDSO
+#include <asm/vdso/compat_gettimeofday.h>
+#else
+#include <asm/vdso/gettimeofday.h>
+#endif /* ENABLE_COMPAT_VDSO */
+
+#ifndef vdso_calc_delta
+/*
+ * Default implementation which works for all sane clocksources. That
+ * obviously excludes x86/TSC.
+ */
+static __always_inline
+u64 vdso_calc_delta(u64 cycles, u64 last, u64 mask, u32 mult)
+{
+ return ((cycles - last) & mask) * mult;
+}
+#endif
+
+static int do_hres(const struct vdso_data *vd, clockid_t clk,
+ struct __kernel_timespec *ts)
+{
+ const struct vdso_timestamp *vdso_ts = &vd->basetime[clk];
+ u64 cycles, last, sec, ns;
+ u32 seq;
+
+ do {
+ seq = vdso_read_begin(vd);
+ cycles = __arch_get_hw_counter(vd->clock_mode);
+ ns = vdso_ts->nsec;
+ last = vd->cycle_last;
+ if (unlikely((s64)cycles < 0))
+ return clock_gettime_fallback(clk, ts);
+
+ ns += vdso_calc_delta(cycles, last, vd->mask, vd->mult);
+ ns >>= vd->shift;
+ sec = vdso_ts->sec;
+ } while (unlikely(vdso_read_retry(vd, seq)));
+
+ /*
+ * Do this outside the loop: a race inside the loop could result
+ * in __iter_div_u64_rem() being extremely slow.
+ */
+ ts->tv_sec = sec + __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns);
+ ts->tv_nsec = ns;
+
+ return 0;
+}
+
+static void do_coarse(const struct vdso_data *vd, clockid_t clk,
+ struct __kernel_timespec *ts)
+{
+ const struct vdso_timestamp *vdso_ts = &vd->basetime[clk];
+ u32 seq;
+
+ do {
+ seq = vdso_read_begin(vd);
+ ts->tv_sec = vdso_ts->sec;
+ ts->tv_nsec = vdso_ts->nsec;
+ } while (unlikely(vdso_read_retry(vd, seq)));
+}
+
+static __maybe_unused int
+__cvdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts)
+{
+ const struct vdso_data *vd = __arch_get_vdso_data();
+ u32 msk;
+
+ /* Check for negative values or invalid clocks */
+ if (unlikely((u32) clock >= MAX_CLOCKS))
+ goto fallback;
+
+ /*
+ * Convert the clockid to a bitmask and use it to check which
+ * clocks are handled in the VDSO directly.
+ */
+ msk = 1U << clock;
+ if (likely(msk & VDSO_HRES)) {
+ return do_hres(&vd[CS_HRES_COARSE], clock, ts);
+ } else if (msk & VDSO_COARSE) {
+ do_coarse(&vd[CS_HRES_COARSE], clock, ts);
+ return 0;
+ } else if (msk & VDSO_RAW) {
+ return do_hres(&vd[CS_RAW], clock, ts);
+ }
+
+fallback:
+ return clock_gettime_fallback(clock, ts);
+}
+
+static __maybe_unused int
+__cvdso_clock_gettime32(clockid_t clock, struct old_timespec32 *res)
+{
+ struct __kernel_timespec ts;
+ int ret;
+
+ if (res == NULL)
+ goto fallback;
+
+ ret = __cvdso_clock_gettime(clock, &ts);
+
+ if (ret == 0) {
+ res->tv_sec = ts.tv_sec;
+ res->tv_nsec = ts.tv_nsec;
+ }
+
+ return ret;
+
+fallback:
+ return clock_gettime_fallback(clock, (struct __kernel_timespec *)res);
+}
+
+static __maybe_unused int
+__cvdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
+{
+ const struct vdso_data *vd = __arch_get_vdso_data();
+
+ if (likely(tv != NULL)) {
+ struct __kernel_timespec ts;
+
+ if (do_hres(&vd[CS_HRES_COARSE], CLOCK_REALTIME, &ts))
+ return gettimeofday_fallback(tv, tz);
+
+ tv->tv_sec = ts.tv_sec;
+ tv->tv_usec = (u32)ts.tv_nsec / NSEC_PER_USEC;
+ }
+
+ if (unlikely(tz != NULL)) {
+ tz->tz_minuteswest = vd[CS_HRES_COARSE].tz_minuteswest;
+ tz->tz_dsttime = vd[CS_HRES_COARSE].tz_dsttime;
+ }
+
+ return 0;
+}
+
+#ifdef VDSO_HAS_TIME
+static __maybe_unused time_t __cvdso_time(time_t *time)
+{
+ const struct vdso_data *vd = __arch_get_vdso_data();
+ time_t t = READ_ONCE(vd[CS_HRES_COARSE].basetime[CLOCK_REALTIME].sec);
+
+ if (time)
+ *time = t;
+
+ return t;
+}
+#endif /* VDSO_HAS_TIME */
+
+#ifdef VDSO_HAS_CLOCK_GETRES
+static __maybe_unused
+int __cvdso_clock_getres(clockid_t clock, struct __kernel_timespec *res)
+{
+ const struct vdso_data *vd = __arch_get_vdso_data();
+ u64 ns;
+ u32 msk;
+ u64 hrtimer_res = READ_ONCE(vd[CS_HRES_COARSE].hrtimer_res);
+
+ /* Check for negative values or invalid clocks */
+ if (unlikely((u32) clock >= MAX_CLOCKS))
+ goto fallback;
+
+ /*
+ * Convert the clockid to a bitmask and use it to check which
+ * clocks are handled in the VDSO directly.
+ */
+ msk = 1U << clock;
+ if (msk & VDSO_HRES) {
+ /*
+ * Preserves the behaviour of posix_get_hrtimer_res().
+ */
+ ns = hrtimer_res;
+ } else if (msk & VDSO_COARSE) {
+ /*
+ * Preserves the behaviour of posix_get_coarse_res().
+ */
+ ns = LOW_RES_NSEC;
+ } else if (msk & VDSO_RAW) {
+ /*
+ * Preserves the behaviour of posix_get_hrtimer_res().
+ */
+ ns = hrtimer_res;
+ } else {
+ goto fallback;
+ }
+
+ if (res) {
+ res->tv_sec = 0;
+ res->tv_nsec = ns;
+ }
+
+ return 0;
+
+fallback:
+ return clock_getres_fallback(clock, res);
+}
+
+static __maybe_unused int
+__cvdso_clock_getres_time32(clockid_t clock, struct old_timespec32 *res)
+{
+ struct __kernel_timespec ts;
+ int ret;
+
+ if (res == NULL)
+ goto fallback;
+
+ ret = __cvdso_clock_getres(clock, &ts);
+
+ if (ret == 0) {
+ res->tv_sec = ts.tv_sec;
+ res->tv_nsec = ts.tv_nsec;
+ }
+
+ return ret;
+
+fallback:
+ return clock_getres_fallback(clock, (struct __kernel_timespec *)res);
+}
+#endif /* VDSO_HAS_CLOCK_GETRES */
diff --git a/tools/testing/selftests/timers/freq-step.c b/tools/testing/selftests/timers/freq-step.c
index 8cd10662ffba..4b76450d78d1 100644
--- a/tools/testing/selftests/timers/freq-step.c
+++ b/tools/testing/selftests/timers/freq-step.c
@@ -21,9 +21,9 @@
#define SAMPLE_READINGS 10
#define MEAN_SAMPLE_INTERVAL 0.1
#define STEP_INTERVAL 1.0
-#define MAX_PRECISION 100e-9
-#define MAX_FREQ_ERROR 10e-6
-#define MAX_STDDEV 1000e-9
+#define MAX_PRECISION 500e-9
+#define MAX_FREQ_ERROR 0.02e-6
+#define MAX_STDDEV 50e-9
#ifndef ADJ_SETOFFSET
#define ADJ_SETOFFSET 0x0100