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authorLinus Torvalds <torvalds@linux-foundation.org>2022-12-14 02:22:14 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-12-14 02:22:14 +0300
commit4cb1fc6fffe4910845e183d1a2dfe9509ba1062c (patch)
treef7986abd08f7bc3f8e769a1da66cb00ad745f26e /arch/arm
parent740afa4d39414516c36836ad88bed8294c72ba5f (diff)
parentaaa4dd1b47f5ff5ef477fec5dcc6c397b457f1c2 (diff)
downloadlinux-4cb1fc6fffe4910845e183d1a2dfe9509ba1062c.tar.xz
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King: - update unwinder to cope with module PLTs - enable UBSAN on ARM - improve kernel fault message - update UEFI runtime page tables dump - avoid clang's __aeabi_uldivmod generated in NWFPE code - disable FIQs on CPU shutdown paths - update XOR register usage - a number of build updates (using .arch, thread pointer, removal of lazy evaluation in Makefile) - conversion of stacktrace code to stackwalk - findbit assembly updates - hwcap feature updates for ARMv8 CPUs - instruction dump updates for big-endian platforms - support for function error injection * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (31 commits) ARM: 9279/1: support function error injection ARM: 9277/1: Make the dumped instructions are consistent with the disassembled ones ARM: 9276/1: Refactor dump_instr() ARM: 9275/1: Drop '-mthumb' from AFLAGS_ISA ARM: 9274/1: Add hwcap for Speculative Store Bypassing Safe ARM: 9273/1: Add hwcap for Speculation Barrier(SB) ARM: 9272/1: vfp: Add hwcap for FEAT_AA32I8MM ARM: 9271/1: vfp: Add hwcap for FEAT_AA32BF16 ARM: 9270/1: vfp: Add hwcap for FEAT_FHM ARM: 9269/1: vfp: Add hwcap for FEAT_DotProd ARM: 9268/1: vfp: Add hwcap FPHP and ASIMDHP for FEAT_FP16 ARM: 9267/1: Define Armv8 registers in AArch32 state ARM: findbit: add unwinder information ARM: findbit: operate by words ARM: findbit: convert to macros ARM: findbit: provide more efficient ARMv7 implementation ARM: findbit: document ARMv5 bit offset calculation ARM: 9259/1: stacktrace: Convert stacktrace to generic ARCH_STACKWALK ARM: 9258/1: stacktrace: Make stack walk callback consistent with generic code ARM: 9265/1: pass -march= only to compiler ...
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/Kconfig3
-rw-r--r--arch/arm/Makefile81
-rw-r--r--arch/arm/boot/compressed/Makefile2
-rw-r--r--arch/arm/common/Makefile2
-rw-r--r--arch/arm/common/mcpm_head.S2
-rw-r--r--arch/arm/common/vlock.S2
-rw-r--r--arch/arm/include/asm/assembler.h6
-rw-r--r--arch/arm/include/asm/cputype.h4
-rw-r--r--arch/arm/include/asm/module.h5
-rw-r--r--arch/arm/include/asm/ptdump.h1
-rw-r--r--arch/arm/include/asm/ptrace.h4
-rw-r--r--arch/arm/include/asm/stacktrace.h2
-rw-r--r--arch/arm/include/asm/vfp.h6
-rw-r--r--arch/arm/include/asm/xor.h4
-rw-r--r--arch/arm/include/uapi/asm/hwcap.h8
-rw-r--r--arch/arm/kernel/Makefile2
-rw-r--r--arch/arm/kernel/hyp-stub.S2
-rw-r--r--arch/arm/kernel/machine_kexec.c2
-rw-r--r--arch/arm/kernel/module-plts.c14
-rw-r--r--arch/arm/kernel/perf_callchain.c9
-rw-r--r--arch/arm/kernel/return_address.c8
-rw-r--r--arch/arm/kernel/setup.c22
-rw-r--r--arch/arm/kernel/smp.c5
-rw-r--r--arch/arm/kernel/stacktrace.c119
-rw-r--r--arch/arm/kernel/swp_emulate.c1
-rw-r--r--arch/arm/kernel/traps.c25
-rw-r--r--arch/arm/kernel/unwind.c13
-rw-r--r--arch/arm/lib/Makefile6
-rw-r--r--arch/arm/lib/delay-loop.S4
-rw-r--r--arch/arm/lib/error-inject.c10
-rw-r--r--arch/arm/lib/findbit.S230
-rw-r--r--arch/arm/mach-at91/Makefile3
-rw-r--r--arch/arm/mach-at91/pm_suspend.S4
-rw-r--r--arch/arm/mach-imx/Makefile3
-rw-r--r--arch/arm/mach-imx/headsmp.S2
-rw-r--r--arch/arm/mach-imx/resume-imx6.S2
-rw-r--r--arch/arm/mach-imx/suspend-imx6.S2
-rw-r--r--arch/arm/mach-mvebu/Makefile3
-rw-r--r--arch/arm/mach-mvebu/coherency_ll.S1
-rw-r--r--arch/arm/mach-mvebu/pmsu.c1
-rw-r--r--arch/arm/mach-npcm/Makefile2
-rw-r--r--arch/arm/mach-npcm/headsmp.S2
-rw-r--r--arch/arm/mach-tegra/Makefile2
-rw-r--r--arch/arm/mach-tegra/reset-handler.S2
-rw-r--r--arch/arm/mach-tegra/sleep-tegra20.S2
-rw-r--r--arch/arm/mach-tegra/sleep-tegra30.S2
-rw-r--r--arch/arm/mach-tegra/sleep.S2
-rw-r--r--arch/arm/mm/Makefile15
-rw-r--r--arch/arm/mm/abort-ev6.S1
-rw-r--r--arch/arm/mm/abort-ev7.S1
-rw-r--r--arch/arm/mm/cache-v6.S2
-rw-r--r--arch/arm/mm/cache-v7.S2
-rw-r--r--arch/arm/mm/cache-v7m.S2
-rw-r--r--arch/arm/mm/copypage-feroceon.c1
-rw-r--r--arch/arm/mm/fault.c5
-rw-r--r--arch/arm/mm/proc-v6.S2
-rw-r--r--arch/arm/mm/proc-v7-2level.S2
-rw-r--r--arch/arm/mm/proc-v7.S2
-rw-r--r--arch/arm/mm/tlb-v6.S2
-rw-r--r--arch/arm/mm/tlb-v7.S2
-rw-r--r--arch/arm/nwfpe/Makefile6
-rw-r--r--arch/arm/vdso/Makefile1
-rw-r--r--arch/arm/vfp/vfpmodule.c32
63 files changed, 388 insertions, 329 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a08c9d092a33..65d0daf63262 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -17,6 +17,7 @@ config ARM
select ARCH_HAS_PTE_SPECIAL if ARM_LPAE
select ARCH_HAS_SETUP_DMA_OPS
select ARCH_HAS_SET_MEMORY
+ select ARCH_STACKWALK
select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
select ARCH_HAS_STRICT_MODULE_RWX if MMU
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
@@ -27,6 +28,7 @@ config ARM
select ARCH_HAVE_NMI_SAFE_CMPXCHG if CPU_V7 || CPU_V7M || CPU_V6K
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_KEEP_MEMBLOCK
+ select ARCH_HAS_UBSAN_SANITIZE_ALL
select ARCH_MIGHT_HAVE_PC_PARPORT
select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT if CPU_V7
@@ -95,6 +97,7 @@ config ARM
select HAVE_EXIT_THREAD
select HAVE_FAST_GUP if ARM_LPAE
select HAVE_FTRACE_MCOUNT_RECORD if !XIP_KERNEL
+ select HAVE_FUNCTION_ERROR_INJECTION
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FUNCTION_TRACER if !XIP_KERNEL
select HAVE_GCC_PLUGINS
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index c846119c448f..4067f5169144 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -60,47 +60,54 @@ endif
KBUILD_CFLAGS += $(call cc-option,-fno-ipa-sra)
# This selects which instruction set is used.
+arch-$(CONFIG_CPU_32v7M) :=-march=armv7-m
+arch-$(CONFIG_CPU_32v7) :=-march=armv7-a
+arch-$(CONFIG_CPU_32v6) :=-march=armv6
+# Only override the compiler option if ARMv6. The ARMv6K extensions are
+# always available in ARMv7
+ifeq ($(CONFIG_CPU_32v6),y)
+arch-$(CONFIG_CPU_32v6K) :=-march=armv6k
+endif
+arch-$(CONFIG_CPU_32v5) :=-march=armv5te
+arch-$(CONFIG_CPU_32v4T) :=-march=armv4t
+arch-$(CONFIG_CPU_32v4) :=-march=armv4
+arch-$(CONFIG_CPU_32v3) :=-march=armv3m
+
# Note that GCC does not numerically define an architecture version
# macro, but instead defines a whole series of macros which makes
# testing for a specific architecture or later rather impossible.
-arch-$(CONFIG_CPU_32v7M) =-D__LINUX_ARM_ARCH__=7 -march=armv7-m
-arch-$(CONFIG_CPU_32v7) =-D__LINUX_ARM_ARCH__=7 -march=armv7-a
-arch-$(CONFIG_CPU_32v6) =-D__LINUX_ARM_ARCH__=6 -march=armv6
+cpp-$(CONFIG_CPU_32v7M) :=-D__LINUX_ARM_ARCH__=7
+cpp-$(CONFIG_CPU_32v7) :=-D__LINUX_ARM_ARCH__=7
+cpp-$(CONFIG_CPU_32v6) :=-D__LINUX_ARM_ARCH__=6
# Only override the compiler option if ARMv6. The ARMv6K extensions are
# always available in ARMv7
ifeq ($(CONFIG_CPU_32v6),y)
-arch-$(CONFIG_CPU_32v6K) =-D__LINUX_ARM_ARCH__=6 -march=armv6k
+cpp-$(CONFIG_CPU_32v6K) :=-D__LINUX_ARM_ARCH__=6
endif
-arch-$(CONFIG_CPU_32v5) =-D__LINUX_ARM_ARCH__=5 -march=armv5te
-arch-$(CONFIG_CPU_32v4T) =-D__LINUX_ARM_ARCH__=4 -march=armv4t
-arch-$(CONFIG_CPU_32v4) =-D__LINUX_ARM_ARCH__=4 -march=armv4
-arch-$(CONFIG_CPU_32v3) =-D__LINUX_ARM_ARCH__=3 -march=armv3m
-
-# Evaluate arch cc-option calls now
-arch-y := $(arch-y)
+cpp-$(CONFIG_CPU_32v5) :=-D__LINUX_ARM_ARCH__=5
+cpp-$(CONFIG_CPU_32v4T) :=-D__LINUX_ARM_ARCH__=4
+cpp-$(CONFIG_CPU_32v4) :=-D__LINUX_ARM_ARCH__=4
+cpp-$(CONFIG_CPU_32v3) :=-D__LINUX_ARM_ARCH__=3
# This selects how we optimise for the processor.
-tune-$(CONFIG_CPU_ARM7TDMI) =-mtune=arm7tdmi
-tune-$(CONFIG_CPU_ARM720T) =-mtune=arm7tdmi
-tune-$(CONFIG_CPU_ARM740T) =-mtune=arm7tdmi
-tune-$(CONFIG_CPU_ARM9TDMI) =-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM940T) =-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM946E) =-mtune=arm9e
-tune-$(CONFIG_CPU_ARM920T) =-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM922T) =-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM925T) =-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM926T) =-mtune=arm9tdmi
-tune-$(CONFIG_CPU_FA526) =-mtune=arm9tdmi
-tune-$(CONFIG_CPU_SA110) =-mtune=strongarm110
-tune-$(CONFIG_CPU_SA1100) =-mtune=strongarm1100
-tune-$(CONFIG_CPU_XSCALE) =-mtune=xscale
-tune-$(CONFIG_CPU_XSC3) =-mtune=xscale
-tune-$(CONFIG_CPU_FEROCEON) =-mtune=xscale
-tune-$(CONFIG_CPU_V6) =-mtune=arm1136j-s
-tune-$(CONFIG_CPU_V6K) =-mtune=arm1136j-s
-
-# Evaluate tune cc-option calls now
-tune-y := $(tune-y)
+tune-$(CONFIG_CPU_ARM7TDMI) :=-mtune=arm7tdmi
+tune-$(CONFIG_CPU_ARM720T) :=-mtune=arm7tdmi
+tune-$(CONFIG_CPU_ARM740T) :=-mtune=arm7tdmi
+tune-$(CONFIG_CPU_ARM9TDMI) :=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM940T) :=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM946E) :=-mtune=arm9e
+tune-$(CONFIG_CPU_ARM920T) :=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM922T) :=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM925T) :=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM926T) :=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_FA526) :=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_SA110) :=-mtune=strongarm110
+tune-$(CONFIG_CPU_SA1100) :=-mtune=strongarm1100
+tune-$(CONFIG_CPU_XSCALE) :=-mtune=xscale
+tune-$(CONFIG_CPU_XSC3) :=-mtune=xscale
+tune-$(CONFIG_CPU_FEROCEON) :=-mtune=xscale
+tune-$(CONFIG_CPU_V6) :=-mtune=arm1136j-s
+tune-$(CONFIG_CPU_V6K) :=-mtune=arm1136j-s
ifeq ($(CONFIG_AEABI),y)
CFLAGS_ABI :=-mabi=aapcs-linux -mfpu=vfp
@@ -117,23 +124,25 @@ CFLAGS_ABI += -meabi gnu
endif
ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y)
-CFLAGS_ABI += -mtp=cp15
+KBUILD_CFLAGS += -mtp=cp15
endif
# Accept old syntax despite ".syntax unified"
AFLAGS_NOWARN :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
ifeq ($(CONFIG_THUMB2_KERNEL),y)
-CFLAGS_ISA :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
-AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
+CFLAGS_ISA :=-Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
+AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb -D__thumb2__=2
+CFLAGS_ISA +=-mthumb
else
CFLAGS_ISA :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
AFLAGS_ISA :=$(CFLAGS_ISA)
endif
# Need -Uarm for gcc < 3.x
+KBUILD_CPPFLAGS +=$(cpp-y)
KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
-KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/unified.h -msoft-float
+KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) -Wa,$(arch-y) $(tune-y) -include asm/unified.h -msoft-float
CHECKFLAGS += -D__arm__
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index 41bcbb460fac..8c63f0a26f56 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -27,6 +27,7 @@ KASAN_SANITIZE := n
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
+UBSAN_SANITIZE := n
#
# Architecture dependencies
@@ -163,4 +164,3 @@ $(obj)/piggy_data: $(obj)/../Image FORCE
$(obj)/piggy.o: $(obj)/piggy_data
CFLAGS_font.o := -Dstatic=
-AFLAGS_hyp-stub.o := -Wa,-march=armv7-a
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index 7bae8cbaafe7..9733381074e0 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -13,7 +13,5 @@ obj-$(CONFIG_SHARP_SCOOP) += scoop.o
obj-$(CONFIG_CPU_V7) += secure_cntvoff.o
obj-$(CONFIG_MCPM) += mcpm_head.o mcpm_entry.o mcpm_platsmp.o vlock.o
CFLAGS_REMOVE_mcpm_entry.o = -pg
-AFLAGS_mcpm_head.o := -march=armv7-a
-AFLAGS_vlock.o := -march=armv7-a
obj-$(CONFIG_BL_SWITCHER) += bL_switcher.o
obj-$(CONFIG_BL_SWITCHER_DUMMY_IF) += bL_switcher_dummy_if.o
diff --git a/arch/arm/common/mcpm_head.S b/arch/arm/common/mcpm_head.S
index 291d969bc719..299495c43dfd 100644
--- a/arch/arm/common/mcpm_head.S
+++ b/arch/arm/common/mcpm_head.S
@@ -15,6 +15,8 @@
#include "vlock.h"
+.arch armv7-a
+
.if MCPM_SYNC_CLUSTER_CPUS
.error "cpus must be the first member of struct mcpm_sync_struct"
.endif
diff --git a/arch/arm/common/vlock.S b/arch/arm/common/vlock.S
index f1c7fd44f1b1..1fa09c4697ed 100644
--- a/arch/arm/common/vlock.S
+++ b/arch/arm/common/vlock.S
@@ -12,6 +12,8 @@
#include <linux/linkage.h>
#include "vlock.h"
+.arch armv7-a
+
/* Select different code if voting flags can fit in a single word. */
#if VLOCK_VOTING_SIZE > 4
#define FEW(x...)
diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h
index 90fbe4a3f9c8..28e18f79c300 100644
--- a/arch/arm/include/asm/assembler.h
+++ b/arch/arm/include/asm/assembler.h
@@ -761,6 +761,12 @@ THUMB( orr \reg , \reg , #PSR_T_BIT )
.endif
.endm
+ .if __LINUX_ARM_ARCH__ < 6
+ .set .Lrev_l_uses_tmp, 1
+ .else
+ .set .Lrev_l_uses_tmp, 0
+ .endif
+
/*
* bl_r - branch and link to register
*
diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h
index 775cac3c02bb..0163c3e78a67 100644
--- a/arch/arm/include/asm/cputype.h
+++ b/arch/arm/include/asm/cputype.h
@@ -25,6 +25,8 @@
#define CPUID_EXT_ISAR3 0x6c
#define CPUID_EXT_ISAR4 0x70
#define CPUID_EXT_ISAR5 0x74
+#define CPUID_EXT_ISAR6 0x7c
+#define CPUID_EXT_PFR2 0x90
#else
#define CPUID_EXT_PFR0 "c1, 0"
#define CPUID_EXT_PFR1 "c1, 1"
@@ -40,6 +42,8 @@
#define CPUID_EXT_ISAR3 "c2, 3"
#define CPUID_EXT_ISAR4 "c2, 4"
#define CPUID_EXT_ISAR5 "c2, 5"
+#define CPUID_EXT_ISAR6 "c2, 7"
+#define CPUID_EXT_PFR2 "c3, 4"
#endif
#define MPIDR_SMP_BITMASK (0x3 << 30)
diff --git a/arch/arm/include/asm/module.h b/arch/arm/include/asm/module.h
index 5546c9751478..07c51a34f77d 100644
--- a/arch/arm/include/asm/module.h
+++ b/arch/arm/include/asm/module.h
@@ -37,6 +37,11 @@ struct mod_arch_specific {
struct module;
u32 get_module_plt(struct module *mod, unsigned long loc, Elf32_Addr val);
+#ifdef CONFIG_ARM_MODULE_PLTS
+bool in_module_plt(unsigned long loc);
+#else
+static inline bool in_module_plt(unsigned long loc) { return false; }
+#endif
#ifdef CONFIG_THUMB2_KERNEL
#define HAVE_ARCH_KALLSYMS_SYMBOL_VALUE
diff --git a/arch/arm/include/asm/ptdump.h b/arch/arm/include/asm/ptdump.h
index 0c2d3d0d4cc6..aad1d034136c 100644
--- a/arch/arm/include/asm/ptdump.h
+++ b/arch/arm/include/asm/ptdump.h
@@ -21,6 +21,7 @@ struct ptdump_info {
void ptdump_walk_pgd(struct seq_file *s, struct ptdump_info *info);
#ifdef CONFIG_ARM_PTDUMP_DEBUGFS
+#define EFI_RUNTIME_MAP_END SZ_1G
void ptdump_debugfs_register(struct ptdump_info *info, const char *name);
#else
static inline void ptdump_debugfs_register(struct ptdump_info *info,
diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h
index 1408a6a15d0e..483b8ddfcb82 100644
--- a/arch/arm/include/asm/ptrace.h
+++ b/arch/arm/include/asm/ptrace.h
@@ -163,6 +163,10 @@ static inline unsigned long user_stack_pointer(struct pt_regs *regs)
((current_stack_pointer | (THREAD_SIZE - 1)) - 7) - 1; \
})
+static inline void regs_set_return_value(struct pt_regs *regs, unsigned long rc)
+{
+ regs->ARM_r0 = rc;
+}
/*
* Update ITSTATE after normal execution of an IT block instruction.
diff --git a/arch/arm/include/asm/stacktrace.h b/arch/arm/include/asm/stacktrace.h
index 36b2ff44fcbb..360f0d2406bf 100644
--- a/arch/arm/include/asm/stacktrace.h
+++ b/arch/arm/include/asm/stacktrace.h
@@ -44,7 +44,7 @@ void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
extern int unwind_frame(struct stackframe *frame);
extern void walk_stackframe(struct stackframe *frame,
- int (*fn)(struct stackframe *, void *), void *data);
+ bool (*fn)(void *, unsigned long), void *data);
extern void dump_mem(const char *lvl, const char *str, unsigned long bottom,
unsigned long top);
extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
diff --git a/arch/arm/include/asm/vfp.h b/arch/arm/include/asm/vfp.h
index 19928bfb4f9c..157ea3426158 100644
--- a/arch/arm/include/asm/vfp.h
+++ b/arch/arm/include/asm/vfp.h
@@ -87,6 +87,12 @@
#define MVFR0_DP_BIT (8)
#define MVFR0_DP_MASK (0xf << MVFR0_DP_BIT)
+/* MVFR1 bits */
+#define MVFR1_ASIMDHP_BIT (20)
+#define MVFR1_ASIMDHP_MASK (0xf << MVFR1_ASIMDHP_BIT)
+#define MVFR1_FPHP_BIT (24)
+#define MVFR1_FPHP_MASK (0xf << MVFR1_FPHP_BIT)
+
/* Bit patterns for decoding the packaged operation descriptors */
#define VFPOPDESC_LENGTH_BIT (9)
#define VFPOPDESC_LENGTH_MASK (0x07 << VFPOPDESC_LENGTH_BIT)
diff --git a/arch/arm/include/asm/xor.h b/arch/arm/include/asm/xor.h
index 669cad5194d3..934b549905f5 100644
--- a/arch/arm/include/asm/xor.h
+++ b/arch/arm/include/asm/xor.h
@@ -51,7 +51,7 @@ xor_arm4regs_2(unsigned long bytes, unsigned long * __restrict p1,
register unsigned int a1 __asm__("r4");
register unsigned int a2 __asm__("r5");
register unsigned int a3 __asm__("r6");
- register unsigned int a4 __asm__("r7");
+ register unsigned int a4 __asm__("r10");
register unsigned int b1 __asm__("r8");
register unsigned int b2 __asm__("r9");
register unsigned int b3 __asm__("ip");
@@ -73,7 +73,7 @@ xor_arm4regs_3(unsigned long bytes, unsigned long * __restrict p1,
register unsigned int a1 __asm__("r4");
register unsigned int a2 __asm__("r5");
register unsigned int a3 __asm__("r6");
- register unsigned int a4 __asm__("r7");
+ register unsigned int a4 __asm__("r10");
register unsigned int b1 __asm__("r8");
register unsigned int b2 __asm__("r9");
register unsigned int b3 __asm__("ip");
diff --git a/arch/arm/include/uapi/asm/hwcap.h b/arch/arm/include/uapi/asm/hwcap.h
index 990199d8b7c6..6b2023e39b6f 100644
--- a/arch/arm/include/uapi/asm/hwcap.h
+++ b/arch/arm/include/uapi/asm/hwcap.h
@@ -28,6 +28,12 @@
#define HWCAP_IDIV (HWCAP_IDIVA | HWCAP_IDIVT)
#define HWCAP_LPAE (1 << 20)
#define HWCAP_EVTSTRM (1 << 21)
+#define HWCAP_FPHP (1 << 22)
+#define HWCAP_ASIMDHP (1 << 23)
+#define HWCAP_ASIMDDP (1 << 24)
+#define HWCAP_ASIMDFHM (1 << 25)
+#define HWCAP_ASIMDBF16 (1 << 26)
+#define HWCAP_I8MM (1 << 27)
/*
* HWCAP2 flags - for elf_hwcap2 (in kernel) and AT_HWCAP2
@@ -37,5 +43,7 @@
#define HWCAP2_SHA1 (1 << 2)
#define HWCAP2_SHA2 (1 << 3)
#define HWCAP2_CRC32 (1 << 4)
+#define HWCAP2_SB (1 << 5)
+#define HWCAP2_SSBS (1 << 6)
#endif /* _UAPI__ASMARM_HWCAP_H */
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 48737ec800eb..d53f56d6f840 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -70,7 +70,6 @@ obj-$(CONFIG_HAVE_TCM) += tcm.o
obj-$(CONFIG_OF) += devtree.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_SWP_EMULATE) += swp_emulate.o
-CFLAGS_swp_emulate.o := -Wa,-march=armv7-a
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
obj-$(CONFIG_CPU_XSCALE) += xscale-cp0.o
@@ -99,7 +98,6 @@ CFLAGS_head-inflate-data.o := $(call cc-option,-Wframe-larger-than=10240)
obj-$(CONFIG_XIP_DEFLATED_DATA) += head-inflate-data.o
obj-$(CONFIG_ARM_VIRT_EXT) += hyp-stub.o
-AFLAGS_hyp-stub.o :=-Wa,-march=armv7-a
ifeq ($(CONFIG_ARM_PSCI),y)
obj-$(CONFIG_SMP) += psci_smp.o
endif
diff --git a/arch/arm/kernel/hyp-stub.S b/arch/arm/kernel/hyp-stub.S
index b699b22a4db1..3a506b9095a5 100644
--- a/arch/arm/kernel/hyp-stub.S
+++ b/arch/arm/kernel/hyp-stub.S
@@ -9,6 +9,8 @@
#include <asm/assembler.h>
#include <asm/virt.h>
+.arch armv7-a
+
#ifndef ZIMAGE
/*
* For the kernel proper, we need to find out the CPU boot mode long after
diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
index a2e9ac763a9f..46364b699cc3 100644
--- a/arch/arm/kernel/machine_kexec.c
+++ b/arch/arm/kernel/machine_kexec.c
@@ -77,6 +77,8 @@ static void machine_crash_nonpanic_core(void *unused)
{
struct pt_regs regs;
+ local_fiq_disable();
+
crash_setup_regs(&regs, get_irq_regs());
printk(KERN_DEBUG "CPU %u will stop doing anything useful since another CPU has crashed\n",
smp_processor_id());
diff --git a/arch/arm/kernel/module-plts.c b/arch/arm/kernel/module-plts.c
index 1fc309b41f94..af7c322ebed6 100644
--- a/arch/arm/kernel/module-plts.c
+++ b/arch/arm/kernel/module-plts.c
@@ -284,3 +284,17 @@ int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
mod->arch.core.plt->sh_size, mod->arch.init.plt->sh_size);
return 0;
}
+
+bool in_module_plt(unsigned long loc)
+{
+ struct module *mod;
+ bool ret;
+
+ preempt_disable();
+ mod = __module_text_address(loc);
+ ret = mod && (loc - (u32)mod->arch.core.plt_ent < mod->arch.core.plt_count * PLT_ENT_SIZE ||
+ loc - (u32)mod->arch.init.plt_ent < mod->arch.init.plt_count * PLT_ENT_SIZE);
+ preempt_enable();
+
+ return ret;
+}
diff --git a/arch/arm/kernel/perf_callchain.c b/arch/arm/kernel/perf_callchain.c
index bc6b246ab55e..7147edbe56c6 100644
--- a/arch/arm/kernel/perf_callchain.c
+++ b/arch/arm/kernel/perf_callchain.c
@@ -81,13 +81,12 @@ perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs
* whist unwinding the stackframe and is like a subroutine return so we use
* the PC.
*/
-static int
-callchain_trace(struct stackframe *fr,
- void *data)
+static bool
+callchain_trace(void *data, unsigned long pc)
{
struct perf_callchain_entry_ctx *entry = data;
- perf_callchain_store(entry, fr->pc);
- return 0;
+ perf_callchain_store(entry, pc);
+ return true;
}
void
diff --git a/arch/arm/kernel/return_address.c b/arch/arm/kernel/return_address.c
index 38f1ea9c724d..ac15db66df4c 100644
--- a/arch/arm/kernel/return_address.c
+++ b/arch/arm/kernel/return_address.c
@@ -16,17 +16,17 @@ struct return_address_data {
void *addr;
};
-static int save_return_addr(struct stackframe *frame, void *d)
+static bool save_return_addr(void *d, unsigned long pc)
{
struct return_address_data *data = d;
if (!data->level) {
- data->addr = (void *)frame->pc;
+ data->addr = (void *)pc;
- return 1;
+ return false;
} else {
--data->level;
- return 0;
+ return true;
}
}
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index cb88c6e69377..75cd4699e7b3 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -450,6 +450,8 @@ static void __init cpuid_init_hwcaps(void)
{
int block;
u32 isar5;
+ u32 isar6;
+ u32 pfr2;
if (cpu_architecture() < CPU_ARCH_ARMv7)
return;
@@ -485,6 +487,18 @@ static void __init cpuid_init_hwcaps(void)
block = cpuid_feature_extract_field(isar5, 16);
if (block >= 1)
elf_hwcap2 |= HWCAP2_CRC32;
+
+ /* Check for Speculation barrier instruction */
+ isar6 = read_cpuid_ext(CPUID_EXT_ISAR6);
+ block = cpuid_feature_extract_field(isar6, 12);
+ if (block >= 1)
+ elf_hwcap2 |= HWCAP2_SB;
+
+ /* Check for Speculative Store Bypassing control */
+ pfr2 = read_cpuid_ext(CPUID_EXT_PFR2);
+ block = cpuid_feature_extract_field(pfr2, 4);
+ if (block >= 1)
+ elf_hwcap2 |= HWCAP2_SSBS;
}
static void __init elf_hwcap_fixup(void)
@@ -1249,6 +1263,12 @@ static const char *hwcap_str[] = {
"vfpd32",
"lpae",
"evtstrm",
+ "fphp",
+ "asimdhp",
+ "asimddp",
+ "asimdfhm",
+ "asimdbf16",
+ "i8mm",
NULL
};
@@ -1258,6 +1278,8 @@ static const char *hwcap2_str[] = {
"sha1",
"sha2",
"crc32",
+ "sb",
+ "ssbs",
NULL
};
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 978db2d96b44..36e6efad89f3 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -600,6 +600,8 @@ static DEFINE_RAW_SPINLOCK(stop_lock);
*/
static void ipi_cpu_stop(unsigned int cpu)
{
+ local_fiq_disable();
+
if (system_state <= SYSTEM_RUNNING) {
raw_spin_lock(&stop_lock);
pr_crit("CPU%u: stopping\n", cpu);
@@ -609,9 +611,6 @@ static void ipi_cpu_stop(unsigned int cpu)
set_cpu_online(cpu, false);
- local_fiq_disable();
- local_irq_disable();
-
while (1) {
cpu_relax();
wfe();
diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c
index 85443b5d1922..620aa82e3bdd 100644
--- a/arch/arm/kernel/stacktrace.c
+++ b/arch/arm/kernel/stacktrace.c
@@ -127,12 +127,12 @@ int notrace unwind_frame(struct stackframe *frame)
#endif
void notrace walk_stackframe(struct stackframe *frame,
- int (*fn)(struct stackframe *, void *), void *data)
+ bool (*fn)(void *, unsigned long), void *data)
{
while (1) {
int ret;
- if (fn(frame, data))
+ if (!fn(data, frame->pc))
break;
ret = unwind_frame(frame);
if (ret < 0)
@@ -142,41 +142,32 @@ void notrace walk_stackframe(struct stackframe *frame,
EXPORT_SYMBOL(walk_stackframe);
#ifdef CONFIG_STACKTRACE
-struct stack_trace_data {
- struct stack_trace *trace;
- unsigned int no_sched_functions;
- unsigned int skip;
-};
-
-static int save_trace(struct stackframe *frame, void *d)
+static void start_stack_trace(struct stackframe *frame, struct task_struct *task,
+ unsigned long fp, unsigned long sp,
+ unsigned long lr, unsigned long pc)
{
- struct stack_trace_data *data = d;
- struct stack_trace *trace = data->trace;
- unsigned long addr = frame->pc;
-
- if (data->no_sched_functions && in_sched_functions(addr))
- return 0;
- if (data->skip) {
- data->skip--;
- return 0;
- }
-
- trace->entries[trace->nr_entries++] = addr;
- return trace->nr_entries >= trace->max_entries;
+ frame->fp = fp;
+ frame->sp = sp;
+ frame->lr = lr;
+ frame->pc = pc;
+#ifdef CONFIG_KRETPROBES
+ frame->kr_cur = NULL;
+ frame->tsk = task;
+#endif
+#ifdef CONFIG_UNWINDER_FRAME_POINTER
+ frame->ex_frame = in_entry_text(frame->pc);
+#endif
}
-/* This must be noinline to so that our skip calculation works correctly */
-static noinline void __save_stack_trace(struct task_struct *tsk,
- struct stack_trace *trace, unsigned int nosched)
+void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie,
+ struct task_struct *task, struct pt_regs *regs)
{
- struct stack_trace_data data;
struct stackframe frame;
- data.trace = trace;
- data.skip = trace->skip;
- data.no_sched_functions = nosched;
-
- if (tsk != current) {
+ if (regs) {
+ start_stack_trace(&frame, NULL, regs->ARM_fp, regs->ARM_sp,
+ regs->ARM_lr, regs->ARM_pc);
+ } else if (task != current) {
#ifdef CONFIG_SMP
/*
* What guarantees do we have here that 'tsk' is not
@@ -185,64 +176,22 @@ static noinline void __save_stack_trace(struct task_struct *tsk,
*/
return;
#else
- frame.fp = thread_saved_fp(tsk);
- frame.sp = thread_saved_sp(tsk);
- frame.lr = 0; /* recovered from the stack */
- frame.pc = thread_saved_pc(tsk);
+ start_stack_trace(&frame, task, thread_saved_fp(task),
+ thread_saved_sp(task), 0,
+ thread_saved_pc(task));
#endif
} else {
- /* We don't want this function nor the caller */
- data.skip += 2;
- frame.fp = (unsigned long)__builtin_frame_address(0);
- frame.sp = current_stack_pointer;
- frame.lr = (unsigned long)__builtin_return_address(0);
here:
- frame.pc = (unsigned long)&&here;
+ start_stack_trace(&frame, task,
+ (unsigned long)__builtin_frame_address(0),
+ current_stack_pointer,
+ (unsigned long)__builtin_return_address(0),
+ (unsigned long)&&here);
+ /* skip this function */
+ if (unwind_frame(&frame))
+ return;
}
-#ifdef CONFIG_KRETPROBES
- frame.kr_cur = NULL;
- frame.tsk = tsk;
-#endif
-#ifdef CONFIG_UNWINDER_FRAME_POINTER
- frame.ex_frame = false;
-#endif
-
- walk_stackframe(&frame, save_trace, &data);
-}
-
-void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
-{
- struct stack_trace_data data;
- struct stackframe frame;
-
- data.trace = trace;
- data.skip = trace->skip;
- data.no_sched_functions = 0;
-
- frame.fp = regs->ARM_fp;
- frame.sp = regs->ARM_sp;
- frame.lr = regs->ARM_lr;
- frame.pc = regs->ARM_pc;
-#ifdef CONFIG_KRETPROBES
- frame.kr_cur = NULL;
- frame.tsk = current;
-#endif
-#ifdef CONFIG_UNWINDER_FRAME_POINTER
- frame.ex_frame = in_entry_text(frame.pc);
-#endif
-
- walk_stackframe(&frame, save_trace, &data);
-}
-void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
-{
- __save_stack_trace(tsk, trace, 1);
-}
-EXPORT_SYMBOL(save_stack_trace_tsk);
-
-void save_stack_trace(struct stack_trace *trace)
-{
- __save_stack_trace(current, trace, 0);
+ walk_stackframe(&frame, consume_entry, cookie);
}
-EXPORT_SYMBOL_GPL(save_stack_trace);
#endif
diff --git a/arch/arm/kernel/swp_emulate.c b/arch/arm/kernel/swp_emulate.c
index b74bfcf94fb1..fdce83c95acb 100644
--- a/arch/arm/kernel/swp_emulate.c
+++ b/arch/arm/kernel/swp_emulate.c
@@ -34,6 +34,7 @@
*/
#define __user_swpX_asm(data, addr, res, temp, B) \
__asm__ __volatile__( \
+ ".arch armv7-a\n" \
"0: ldrex"B" %2, [%3]\n" \
"1: strex"B" %0, %1, [%3]\n" \
" cmp %0, #0\n" \
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 20b2db6dcd1c..40c7c807d67f 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -178,19 +178,22 @@ static void dump_instr(const char *lvl, struct pt_regs *regs)
for (i = -4; i < 1 + !!thumb; i++) {
unsigned int val, bad;
- if (!user_mode(regs)) {
- if (thumb) {
- u16 val16;
- bad = get_kernel_nofault(val16, &((u16 *)addr)[i]);
- val = val16;
- } else {
- bad = get_kernel_nofault(val, &((u32 *)addr)[i]);
- }
+ if (thumb) {
+ u16 tmp;
+
+ if (user_mode(regs))
+ bad = get_user(tmp, &((u16 __user *)addr)[i]);
+ else
+ bad = get_kernel_nofault(tmp, &((u16 *)addr)[i]);
+
+ val = __mem_to_opcode_thumb16(tmp);
} else {
- if (thumb)
- bad = get_user(val, &((u16 *)addr)[i]);
+ if (user_mode(regs))
+ bad = get_user(val, &((u32 __user *)addr)[i]);
else
- bad = get_user(val, &((u32 *)addr)[i]);
+ bad = get_kernel_nofault(val, &((u32 *)addr)[i]);
+
+ val = __mem_to_opcode_arm(val);
}
if (!bad)
diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c
index a37ea6c772cd..53be7ea6181b 100644
--- a/arch/arm/kernel/unwind.c
+++ b/arch/arm/kernel/unwind.c
@@ -28,6 +28,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/list.h>
+#include <linux/module.h>
#include <asm/stacktrace.h>
#include <asm/traps.h>
@@ -395,8 +396,18 @@ int unwind_frame(struct stackframe *frame)
idx = unwind_find_idx(frame->pc);
if (!idx) {
- if (frame->pc && kernel_text_address(frame->pc))
+ if (frame->pc && kernel_text_address(frame->pc)) {
+ if (in_module_plt(frame->pc) && frame->pc != frame->lr) {
+ /*
+ * Quoting Ard: Veneers only set PC using a
+ * PC+immediate LDR, and so they don't affect
+ * the state of the stack or the register file
+ */
+ frame->pc = frame->lr;
+ return URC_OK;
+ }
pr_warn("unwind: Index not found %08lx\n", frame->pc);
+ }
return -URC_FAILURE;
}
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 6d2ba454f25b..650404be6768 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -36,10 +36,6 @@ else
lib-y += io-readsw-armv4.o io-writesw-armv4.o
endif
-ifeq ($(CONFIG_ARCH_RPC),y)
- AFLAGS_delay-loop.o += -march=armv4
-endif
-
$(obj)/csumpartialcopy.o: $(obj)/csumpartialcopygeneric.S
$(obj)/csumpartialcopyuser.o: $(obj)/csumpartialcopygeneric.S
@@ -48,3 +44,5 @@ ifeq ($(CONFIG_KERNEL_MODE_NEON),y)
CFLAGS_xor-neon.o += $(NEON_FLAGS)
obj-$(CONFIG_XOR_BLOCKS) += xor-neon.o
endif
+
+obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o
diff --git a/arch/arm/lib/delay-loop.S b/arch/arm/lib/delay-loop.S
index 3ccade0f8130..3ac05177d097 100644
--- a/arch/arm/lib/delay-loop.S
+++ b/arch/arm/lib/delay-loop.S
@@ -8,6 +8,10 @@
#include <asm/assembler.h>
#include <asm/delay.h>
+#ifdef CONFIG_ARCH_RPC
+ .arch armv4
+#endif
+
.text
.LC0: .word loops_per_jiffy
diff --git a/arch/arm/lib/error-inject.c b/arch/arm/lib/error-inject.c
new file mode 100644
index 000000000000..5a5b405792ba
--- /dev/null
+++ b/arch/arm/lib/error-inject.c
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/error-injection.h>
+#include <linux/kprobes.h>
+
+void override_function_with_return(struct pt_regs *regs)
+{
+ instruction_pointer_set(regs, regs->ARM_lr);
+}
+NOKPROBE_SYMBOL(override_function_with_return);
diff --git a/arch/arm/lib/findbit.S b/arch/arm/lib/findbit.S
index 7fd3600db8ef..b7ac2d3c0748 100644
--- a/arch/arm/lib/findbit.S
+++ b/arch/arm/lib/findbit.S
@@ -12,182 +12,128 @@
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
+#include <asm/unwind.h>
.text
-/*
- * Purpose : Find a 'zero' bit
- * Prototype: int find_first_zero_bit(void *addr, unsigned int maxbit);
- */
-ENTRY(_find_first_zero_bit_le)
- teq r1, #0
- beq 3f
- mov r2, #0
-1:
- ARM( ldrb r3, [r0, r2, lsr #3] )
- THUMB( lsr r3, r2, #3 )
- THUMB( ldrb r3, [r0, r3] )
- eors r3, r3, #0xff @ invert bits
- bne .L_found @ any now set - found zero bit
- add r2, r2, #8 @ next bit pointer
-2: cmp r2, r1 @ any more?
- blo 1b
-3: mov r0, r1 @ no free bits
- ret lr
-ENDPROC(_find_first_zero_bit_le)
-
-/*
- * Purpose : Find next 'zero' bit
- * Prototype: int find_next_zero_bit(void *addr, unsigned int maxbit, int offset)
- */
-ENTRY(_find_next_zero_bit_le)
- cmp r2, r1
- bhs 3b
- ands ip, r2, #7
- beq 1b @ If new byte, goto old routine
- ARM( ldrb r3, [r0, r2, lsr #3] )
- THUMB( lsr r3, r2, #3 )
- THUMB( ldrb r3, [r0, r3] )
- eor r3, r3, #0xff @ now looking for a 1 bit
- movs r3, r3, lsr ip @ shift off unused bits
- bne .L_found
- orr r2, r2, #7 @ if zero, then no bits here
- add r2, r2, #1 @ align bit pointer
- b 2b @ loop for next bit
-ENDPROC(_find_next_zero_bit_le)
+#ifdef __ARMEB__
+#define SWAB_ENDIAN le
+#else
+#define SWAB_ENDIAN be
+#endif
-/*
- * Purpose : Find a 'one' bit
- * Prototype: int find_first_bit(const unsigned long *addr, unsigned int maxbit);
- */
-ENTRY(_find_first_bit_le)
- teq r1, #0
+ .macro find_first, endian, set, name
+ENTRY(_find_first_\name\()bit_\endian)
+ UNWIND( .fnstart)
+ teq r1, #0
beq 3f
mov r2, #0
-1:
- ARM( ldrb r3, [r0, r2, lsr #3] )
- THUMB( lsr r3, r2, #3 )
- THUMB( ldrb r3, [r0, r3] )
- movs r3, r3
- bne .L_found @ any now set - found zero bit
- add r2, r2, #8 @ next bit pointer
+1: ldr r3, [r0], #4
+ .ifeq \set
+ mvns r3, r3 @ invert/test bits
+ .else
+ movs r3, r3 @ test bits
+ .endif
+ .ifc \endian, SWAB_ENDIAN
+ bne .L_found_swab
+ .else
+ bne .L_found @ found the bit?
+ .endif
+ add r2, r2, #32 @ next index
2: cmp r2, r1 @ any more?
blo 1b
-3: mov r0, r1 @ no free bits
+3: mov r0, r1 @ no more bits
ret lr
-ENDPROC(_find_first_bit_le)
+ UNWIND( .fnend)
+ENDPROC(_find_first_\name\()bit_\endian)
+ .endm
-/*
- * Purpose : Find next 'one' bit
- * Prototype: int find_next_zero_bit(void *addr, unsigned int maxbit, int offset)
- */
-ENTRY(_find_next_bit_le)
+ .macro find_next, endian, set, name
+ENTRY(_find_next_\name\()bit_\endian)
+ UNWIND( .fnstart)
cmp r2, r1
bhs 3b
- ands ip, r2, #7
- beq 1b @ If new byte, goto old routine
- ARM( ldrb r3, [r0, r2, lsr #3] )
- THUMB( lsr r3, r2, #3 )
- THUMB( ldrb r3, [r0, r3] )
+ mov ip, r2, lsr #5 @ word index
+ add r0, r0, ip, lsl #2
+ ands ip, r2, #31 @ bit position
+ beq 1b
+ ldr r3, [r0], #4
+ .ifeq \set
+ mvn r3, r3 @ invert bits
+ .endif
+ .ifc \endian, SWAB_ENDIAN
+ rev_l r3, ip
+ .if .Lrev_l_uses_tmp
+ @ we need to recompute ip because rev_l will have overwritten
+ @ it.
+ and ip, r2, #31 @ bit position
+ .endif
+ .endif
movs r3, r3, lsr ip @ shift off unused bits
bne .L_found
- orr r2, r2, #7 @ if zero, then no bits here
+ orr r2, r2, #31 @ no zero bits
add r2, r2, #1 @ align bit pointer
b 2b @ loop for next bit
-ENDPROC(_find_next_bit_le)
+ UNWIND( .fnend)
+ENDPROC(_find_next_\name\()bit_\endian)
+ .endm
-#ifdef __ARMEB__
+ .macro find_bit, endian, set, name
+ find_first \endian, \set, \name
+ find_next \endian, \set, \name
+ .endm
-ENTRY(_find_first_zero_bit_be)
- teq r1, #0
- beq 3f
- mov r2, #0
-1: eor r3, r2, #0x18 @ big endian byte ordering
- ARM( ldrb r3, [r0, r3, lsr #3] )
- THUMB( lsr r3, #3 )
- THUMB( ldrb r3, [r0, r3] )
- eors r3, r3, #0xff @ invert bits
- bne .L_found @ any now set - found zero bit
- add r2, r2, #8 @ next bit pointer
-2: cmp r2, r1 @ any more?
- blo 1b
-3: mov r0, r1 @ no free bits
- ret lr
-ENDPROC(_find_first_zero_bit_be)
+/* _find_first_zero_bit_le and _find_next_zero_bit_le */
+ find_bit le, 0, zero_
-ENTRY(_find_next_zero_bit_be)
- cmp r2, r1
- bhs 3b
- ands ip, r2, #7
- beq 1b @ If new byte, goto old routine
- eor r3, r2, #0x18 @ big endian byte ordering
- ARM( ldrb r3, [r0, r3, lsr #3] )
- THUMB( lsr r3, #3 )
- THUMB( ldrb r3, [r0, r3] )
- eor r3, r3, #0xff @ now looking for a 1 bit
- movs r3, r3, lsr ip @ shift off unused bits
- bne .L_found
- orr r2, r2, #7 @ if zero, then no bits here
- add r2, r2, #1 @ align bit pointer
- b 2b @ loop for next bit
-ENDPROC(_find_next_zero_bit_be)
+/* _find_first_bit_le and _find_next_bit_le */
+ find_bit le, 1
-ENTRY(_find_first_bit_be)
- teq r1, #0
- beq 3f
- mov r2, #0
-1: eor r3, r2, #0x18 @ big endian byte ordering
- ARM( ldrb r3, [r0, r3, lsr #3] )
- THUMB( lsr r3, #3 )
- THUMB( ldrb r3, [r0, r3] )
- movs r3, r3
- bne .L_found @ any now set - found zero bit
- add r2, r2, #8 @ next bit pointer
-2: cmp r2, r1 @ any more?
- blo 1b
-3: mov r0, r1 @ no free bits
- ret lr
-ENDPROC(_find_first_bit_be)
+#ifdef __ARMEB__
-ENTRY(_find_next_bit_be)
- cmp r2, r1
- bhs 3b
- ands ip, r2, #7
- beq 1b @ If new byte, goto old routine
- eor r3, r2, #0x18 @ big endian byte ordering
- ARM( ldrb r3, [r0, r3, lsr #3] )
- THUMB( lsr r3, #3 )
- THUMB( ldrb r3, [r0, r3] )
- movs r3, r3, lsr ip @ shift off unused bits
- bne .L_found
- orr r2, r2, #7 @ if zero, then no bits here
- add r2, r2, #1 @ align bit pointer
- b 2b @ loop for next bit
-ENDPROC(_find_next_bit_be)
+/* _find_first_zero_bit_be and _find_next_zero_bit_be */
+ find_bit be, 0, zero_
+
+/* _find_first_bit_be and _find_next_bit_be */
+ find_bit be, 1
#endif
/*
* One or more bits in the LSB of r3 are assumed to be set.
*/
+.L_found_swab:
+ UNWIND( .fnstart)
+ rev_l r3, ip
.L_found:
-#if __LINUX_ARM_ARCH__ >= 5
+#if __LINUX_ARM_ARCH__ >= 7
+ rbit r3, r3 @ reverse bits
+ clz r3, r3 @ count high zero bits
+ add r0, r2, r3 @ add offset of first set bit
+#elif __LINUX_ARM_ARCH__ >= 5
rsb r0, r3, #0
- and r3, r3, r0
- clz r3, r3
- rsb r3, r3, #31
- add r0, r2, r3
+ and r3, r3, r0 @ mask out lowest bit set
+ clz r3, r3 @ count high zero bits
+ rsb r3, r3, #31 @ offset of first set bit
+ add r0, r2, r3 @ add offset of first set bit
#else
- tst r3, #0x0f
+ mov ip, #~0
+ tst r3, ip, lsr #16 @ test bits 0-15
+ addeq r2, r2, #16
+ moveq r3, r3, lsr #16
+ tst r3, #0x00ff
+ addeq r2, r2, #8
+ moveq r3, r3, lsr #8
+ tst r3, #0x000f
addeq r2, r2, #4
- movne r3, r3, lsl #4
- tst r3, #0x30
+ moveq r3, r3, lsr #4
+ tst r3, #0x0003
addeq r2, r2, #2
- movne r3, r3, lsl #2
- tst r3, #0x40
+ moveq r3, r3, lsr #2
+ tst r3, #0x0001
addeq r2, r2, #1
mov r0, r2
#endif
cmp r1, r0 @ Clamp to maxbit
movlo r0, r1
ret lr
-
+ UNWIND( .fnend)
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index 0dcc37180588..794bd12ab0a8 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -14,9 +14,6 @@ obj-$(CONFIG_SOC_SAMV7) += samv7.o
# Power Management
obj-$(CONFIG_ATMEL_PM) += pm.o pm_suspend.o
-ifeq ($(CONFIG_CPU_V7),y)
-AFLAGS_pm_suspend.o := -march=armv7-a
-endif
ifeq ($(CONFIG_PM_DEBUG),y)
CFLAGS_pm.o += -DDEBUG
endif
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index e4904faf1753..e5869cca5e79 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
@@ -12,6 +12,10 @@
#include "pm.h"
#include "pm_data-offsets.h"
+#ifdef CONFIG_CPU_V7
+.arch armv7-a
+#endif
+
#define SRAMC_SELF_FRESH_ACTIVE 0x01
#define SRAMC_SELF_FRESH_EXIT 0x00
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 6fb3965b9ae6..5c650bf40e02 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -34,7 +34,6 @@ obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
obj-$(CONFIG_HAVE_IMX_MMDC) += mmdc.o
obj-$(CONFIG_HAVE_IMX_SRC) += src.o
ifneq ($(CONFIG_SOC_IMX6)$(CONFIG_SOC_IMX7D_CA7)$(CONFIG_SOC_LS1021A),)
-AFLAGS_headsmp.o :=-Wa,-march=armv7-a
obj-$(CONFIG_SMP) += headsmp.o platsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
endif
@@ -48,12 +47,10 @@ obj-$(CONFIG_SOC_IMX7D_CM4) += mach-imx7d-cm4.o
obj-$(CONFIG_SOC_IMX7ULP) += mach-imx7ulp.o pm-imx7ulp.o
ifeq ($(CONFIG_SUSPEND),y)
-AFLAGS_suspend-imx6.o :=-Wa,-march=armv7-a
obj-$(CONFIG_SOC_IMX6) += suspend-imx6.o
obj-$(CONFIG_SOC_IMX53) += suspend-imx53.o
endif
ifeq ($(CONFIG_ARM_CPU_SUSPEND),y)
-AFLAGS_resume-imx6.o :=-Wa,-march=armv7-a
obj-$(CONFIG_SOC_IMX6) += resume-imx6.o
endif
obj-$(CONFIG_SOC_IMX6) += pm-imx6.o
diff --git a/arch/arm/mach-imx/headsmp.S b/arch/arm/mach-imx/headsmp.S
index fcba58be8e79..5f9c7b48ae80 100644
--- a/arch/arm/mach-imx/headsmp.S
+++ b/arch/arm/mach-imx/headsmp.S
@@ -8,6 +8,8 @@
#include <linux/init.h>
#include <asm/assembler.h>
+.arch armv7-a
+
diag_reg_offset:
.word g_diag_reg - .
diff --git a/arch/arm/mach-imx/resume-imx6.S b/arch/arm/mach-imx/resume-imx6.S
index 5bd1ba7ef15b..2c0c5c771251 100644
--- a/arch/arm/mach-imx/resume-imx6.S
+++ b/arch/arm/mach-imx/resume-imx6.S
@@ -9,6 +9,8 @@
#include <asm/hardware/cache-l2x0.h>
#include "hardware.h"
+.arch armv7-a
+
/*
* The following code must assume it is running from physical address
* where absolute virtual addresses to the data section have to be
diff --git a/arch/arm/mach-imx/suspend-imx6.S b/arch/arm/mach-imx/suspend-imx6.S
index e06f946b75b9..63ccc2d0e920 100644
--- a/arch/arm/mach-imx/suspend-imx6.S
+++ b/arch/arm/mach-imx/suspend-imx6.S
@@ -9,6 +9,8 @@
#include <asm/hardware/cache-l2x0.h>
#include "hardware.h"
+.arch armv7-a
+
/*
* ==================== low level suspend ====================
*
diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile
index c21733cbb4fa..569768a69ffc 100644
--- a/arch/arm/mach-mvebu/Makefile
+++ b/arch/arm/mach-mvebu/Makefile
@@ -1,9 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
ccflags-y := -I$(srctree)/arch/arm/plat-orion/include
-AFLAGS_coherency_ll.o := -Wa,-march=armv7-a
-CFLAGS_pmsu.o := -march=armv7-a
-
obj-$(CONFIG_MACH_MVEBU_ANY) += system-controller.o mvebu-soc-id.o
ifeq ($(CONFIG_MACH_MVEBU_V7),y)
diff --git a/arch/arm/mach-mvebu/coherency_ll.S b/arch/arm/mach-mvebu/coherency_ll.S
index eb81656e32d4..35930e03d9c6 100644
--- a/arch/arm/mach-mvebu/coherency_ll.S
+++ b/arch/arm/mach-mvebu/coherency_ll.S
@@ -20,6 +20,7 @@
#include <asm/assembler.h>
#include <asm/cp15.h>
+ .arch armv7-a
.text
/*
* Returns the coherency base address in r1 (r0 is untouched), or 0 if
diff --git a/arch/arm/mach-mvebu/pmsu.c b/arch/arm/mach-mvebu/pmsu.c
index af27a7156675..6f366d8c4231 100644
--- a/arch/arm/mach-mvebu/pmsu.c
+++ b/arch/arm/mach-mvebu/pmsu.c
@@ -291,6 +291,7 @@ int armada_370_xp_pmsu_idle_enter(unsigned long deepidle)
/* Test the CR_C bit and set it if it was cleared */
asm volatile(
+ ".arch armv7-a\n\t"
"mrc p15, 0, r0, c1, c0, 0 \n\t"
"tst r0, %0 \n\t"
"orreq r0, r0, #(1 << 2) \n\t"
diff --git a/arch/arm/mach-npcm/Makefile b/arch/arm/mach-npcm/Makefile
index 8d61fcd42fb1..ac83e1caf2ee 100644
--- a/arch/arm/mach-npcm/Makefile
+++ b/arch/arm/mach-npcm/Makefile
@@ -1,6 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
-AFLAGS_headsmp.o += -march=armv7-a
-
obj-$(CONFIG_ARCH_WPCM450) += wpcm450.o
obj-$(CONFIG_ARCH_NPCM7XX) += npcm7xx.o
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
diff --git a/arch/arm/mach-npcm/headsmp.S b/arch/arm/mach-npcm/headsmp.S
index c083fe09a07b..84d2b6daaf0b 100644
--- a/arch/arm/mach-npcm/headsmp.S
+++ b/arch/arm/mach-npcm/headsmp.S
@@ -6,6 +6,8 @@
#include <linux/init.h>
#include <asm/assembler.h>
+.arch armv7-a
+
/*
* The boot ROM does not start secondary CPUs in SVC mode, so we need to do that
* here.
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 07572b5373b8..a2bb55bc0081 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -1,6 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
-asflags-y += -march=armv7-a
-
obj-y += io.o
obj-y += irq.o
obj-y += pm.o
diff --git a/arch/arm/mach-tegra/reset-handler.S b/arch/arm/mach-tegra/reset-handler.S
index 06ca44b09381..0ea456264f3e 100644
--- a/arch/arm/mach-tegra/reset-handler.S
+++ b/arch/arm/mach-tegra/reset-handler.S
@@ -19,6 +19,8 @@
#define PMC_SCRATCH41 0x140
+.arch armv7-a
+
#ifdef CONFIG_PM_SLEEP
/*
* tegra_resume
diff --git a/arch/arm/mach-tegra/sleep-tegra20.S b/arch/arm/mach-tegra/sleep-tegra20.S
index a5a36cce142a..d8cd487a8f63 100644
--- a/arch/arm/mach-tegra/sleep-tegra20.S
+++ b/arch/arm/mach-tegra/sleep-tegra20.S
@@ -47,6 +47,8 @@
#define PLLM_STORE_MASK (1 << 1)
#define PLLP_STORE_MASK (1 << 2)
+.arch armv7-a
+
.macro test_pll_state, rd, test_mask
ldr \rd, tegra_pll_state
tst \rd, #\test_mask
diff --git a/arch/arm/mach-tegra/sleep-tegra30.S b/arch/arm/mach-tegra/sleep-tegra30.S
index 0cc40b6b2ba3..134ea5fe49b2 100644
--- a/arch/arm/mach-tegra/sleep-tegra30.S
+++ b/arch/arm/mach-tegra/sleep-tegra30.S
@@ -78,6 +78,8 @@
#define PLLX_STORE_MASK (1 << 4)
#define PLLM_PMC_STORE_MASK (1 << 5)
+.arch armv7-a
+
.macro emc_device_mask, rd, base
ldr \rd, [\base, #EMC_ADR_CFG]
tst \rd, #0x1
diff --git a/arch/arm/mach-tegra/sleep.S b/arch/arm/mach-tegra/sleep.S
index 8f88944831c5..945f2c1474f7 100644
--- a/arch/arm/mach-tegra/sleep.S
+++ b/arch/arm/mach-tegra/sleep.S
@@ -22,6 +22,8 @@
#define CLK_RESET_CCLK_BURST 0x20
#define CLK_RESET_CCLK_DIVIDER 0x24
+.arch armv7-a
+
#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_PM_SLEEP)
/*
* tegra_disable_clean_inv_dcache
diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile
index 3510503bc5e6..71b858c9b10c 100644
--- a/arch/arm/mm/Makefile
+++ b/arch/arm/mm/Makefile
@@ -33,9 +33,6 @@ obj-$(CONFIG_CPU_ABRT_EV5TJ) += abort-ev5tj.o
obj-$(CONFIG_CPU_ABRT_EV6) += abort-ev6.o
obj-$(CONFIG_CPU_ABRT_EV7) += abort-ev7.o
-AFLAGS_abort-ev6.o :=-Wa,-march=armv6k
-AFLAGS_abort-ev7.o :=-Wa,-march=armv7-a
-
obj-$(CONFIG_CPU_PABRT_LEGACY) += pabort-legacy.o
obj-$(CONFIG_CPU_PABRT_V6) += pabort-v6.o
obj-$(CONFIG_CPU_PABRT_V7) += pabort-v7.o
@@ -49,10 +46,6 @@ obj-$(CONFIG_CPU_CACHE_FA) += cache-fa.o
obj-$(CONFIG_CPU_CACHE_NOP) += cache-nop.o
obj-$(CONFIG_CPU_CACHE_V7M) += cache-v7m.o
-AFLAGS_cache-v6.o :=-Wa,-march=armv6
-AFLAGS_cache-v7.o :=-Wa,-march=armv7-a
-AFLAGS_cache-v7m.o :=-Wa,-march=armv7-m
-
obj-$(CONFIG_CPU_COPY_V4WT) += copypage-v4wt.o
obj-$(CONFIG_CPU_COPY_V4WB) += copypage-v4wb.o
obj-$(CONFIG_CPU_COPY_FEROCEON) += copypage-feroceon.o
@@ -62,8 +55,6 @@ obj-$(CONFIG_CPU_XSCALE) += copypage-xscale.o
obj-$(CONFIG_CPU_XSC3) += copypage-xsc3.o
obj-$(CONFIG_CPU_COPY_FA) += copypage-fa.o
-CFLAGS_copypage-feroceon.o := -march=armv5te
-
obj-$(CONFIG_CPU_TLB_V4WT) += tlb-v4.o
obj-$(CONFIG_CPU_TLB_V4WB) += tlb-v4wb.o
obj-$(CONFIG_CPU_TLB_V4WBI) += tlb-v4wbi.o
@@ -72,9 +63,6 @@ obj-$(CONFIG_CPU_TLB_V6) += tlb-v6.o
obj-$(CONFIG_CPU_TLB_V7) += tlb-v7.o
obj-$(CONFIG_CPU_TLB_FA) += tlb-fa.o
-AFLAGS_tlb-v6.o :=-Wa,-march=armv6
-AFLAGS_tlb-v7.o :=-Wa,-march=armv7-a
-
obj-$(CONFIG_CPU_ARM7TDMI) += proc-arm7tdmi.o
obj-$(CONFIG_CPU_ARM720T) += proc-arm720.o
obj-$(CONFIG_CPU_ARM740T) += proc-arm740.o
@@ -101,9 +89,6 @@ obj-$(CONFIG_CPU_V6K) += proc-v6.o
obj-$(CONFIG_CPU_V7) += proc-v7.o proc-v7-bugs.o
obj-$(CONFIG_CPU_V7M) += proc-v7m.o
-AFLAGS_proc-v6.o :=-Wa,-march=armv6
-AFLAGS_proc-v7.o :=-Wa,-march=armv7-a
-
obj-$(CONFIG_OUTER_CACHE) += l2c-common.o
obj-$(CONFIG_CACHE_B15_RAC) += cache-b15-rac.o
obj-$(CONFIG_CACHE_FEROCEON_L2) += cache-feroceon-l2.o
diff --git a/arch/arm/mm/abort-ev6.S b/arch/arm/mm/abort-ev6.S
index c58bf8b43fea..836dc1299243 100644
--- a/arch/arm/mm/abort-ev6.S
+++ b/arch/arm/mm/abort-ev6.S
@@ -16,6 +16,7 @@
* abort here if the I-TLB and D-TLB aren't seeing the same
* picture. Unfortunately, this does happen. We live with it.
*/
+ .arch armv6k
.align 5
ENTRY(v6_early_abort)
mrc p15, 0, r1, c5, c0, 0 @ get FSR
diff --git a/arch/arm/mm/abort-ev7.S b/arch/arm/mm/abort-ev7.S
index f81bceacc660..53fb41c24774 100644
--- a/arch/arm/mm/abort-ev7.S
+++ b/arch/arm/mm/abort-ev7.S
@@ -12,6 +12,7 @@
*
* Purpose : obtain information about current aborted instruction.
*/
+ .arch armv7-a
.align 5
ENTRY(v7_early_abort)
mrc p15, 0, r1, c5, c0, 0 @ get FSR
diff --git a/arch/arm/mm/cache-v6.S b/arch/arm/mm/cache-v6.S
index f0f65eb073e4..250c83bf7158 100644
--- a/arch/arm/mm/cache-v6.S
+++ b/arch/arm/mm/cache-v6.S
@@ -19,6 +19,8 @@
#define D_CACHE_LINE_SIZE 32
#define BTB_FLUSH_SIZE 8
+.arch armv6
+
/*
* v6_flush_icache_all()
*
diff --git a/arch/arm/mm/cache-v7.S b/arch/arm/mm/cache-v7.S
index 7c9499b728c4..127afe2096ba 100644
--- a/arch/arm/mm/cache-v7.S
+++ b/arch/arm/mm/cache-v7.S
@@ -16,6 +16,8 @@
#include "proc-macros.S"
+.arch armv7-a
+
#ifdef CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND
.globl icache_size
.data
diff --git a/arch/arm/mm/cache-v7m.S b/arch/arm/mm/cache-v7m.S
index 1bc3a0a50753..eb60b5e5e2ad 100644
--- a/arch/arm/mm/cache-v7m.S
+++ b/arch/arm/mm/cache-v7m.S
@@ -18,6 +18,8 @@
#include "proc-macros.S"
+.arch armv7-m
+
/* Generic V7M read/write macros for memory mapped cache operations */
.macro v7m_cache_read, rt, reg
movw \rt, #:lower16:BASEADDR_V7M_SCB + \reg
diff --git a/arch/arm/mm/copypage-feroceon.c b/arch/arm/mm/copypage-feroceon.c
index 064b19e63571..5fc8ef1e665f 100644
--- a/arch/arm/mm/copypage-feroceon.c
+++ b/arch/arm/mm/copypage-feroceon.c
@@ -15,6 +15,7 @@ static void feroceon_copy_user_page(void *kto, const void *kfrom)
int tmp;
asm volatile ("\
+.arch armv5te \n\
1: ldmia %1!, {r2 - r7, ip, lr} \n\
pld [%1, #0] \n\
pld [%1, #32] \n\
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index de988cba9a4b..2418f1efabd8 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -124,8 +124,9 @@ static void die_kernel_fault(const char *msg, struct mm_struct *mm,
{
bust_spinlocks(1);
pr_alert("8<--- cut here ---\n");
- pr_alert("Unable to handle kernel %s at virtual address %08lx\n",
- msg, addr);
+ pr_alert("Unable to handle kernel %s at virtual address %08lx when %s\n",
+ msg, addr, fsr & FSR_LNX_PF ? "execute" :
+ fsr & FSR_WRITE ? "write" : "read");
show_pte(KERN_ALERT, mm, addr);
die("Oops", regs, fsr);
diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S
index a0618f3e6836..203dff89ab1a 100644
--- a/arch/arm/mm/proc-v6.S
+++ b/arch/arm/mm/proc-v6.S
@@ -32,6 +32,8 @@
#define TTB_FLAGS_SMP TTB_RGN_WBWA|TTB_S
#define PMD_FLAGS_SMP PMD_SECT_WBWA|PMD_SECT_S
+.arch armv6
+
ENTRY(cpu_v6_proc_init)
ret lr
diff --git a/arch/arm/mm/proc-v7-2level.S b/arch/arm/mm/proc-v7-2level.S
index 5db029c8f987..0a3083ad19c2 100644
--- a/arch/arm/mm/proc-v7-2level.S
+++ b/arch/arm/mm/proc-v7-2level.S
@@ -24,6 +24,8 @@
#define TTB_FLAGS_SMP TTB_IRGN_WBWA|TTB_S|TTB_NOS|TTB_RGN_OC_WBWA
#define PMD_FLAGS_SMP PMD_SECT_WBWA|PMD_SECT_S
+.arch armv7-a
+
/*
* cpu_v7_switch_mm(pgd_phys, tsk)
*
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 26d726a08a34..6b4ef9539b68 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -24,6 +24,8 @@
#include "proc-v7-2level.S"
#endif
+.arch armv7-a
+
ENTRY(cpu_v7_proc_init)
ret lr
ENDPROC(cpu_v7_proc_init)
diff --git a/arch/arm/mm/tlb-v6.S b/arch/arm/mm/tlb-v6.S
index 74f4b383afe3..1d91e49b2c2d 100644
--- a/arch/arm/mm/tlb-v6.S
+++ b/arch/arm/mm/tlb-v6.S
@@ -17,6 +17,8 @@
#define HARVARD_TLB
+.arch armv6
+
/*
* v6wbi_flush_user_tlb_range(start, end, vma)
*
diff --git a/arch/arm/mm/tlb-v7.S b/arch/arm/mm/tlb-v7.S
index 87bf4ab17721..35fd6d4f0d03 100644
--- a/arch/arm/mm/tlb-v7.S
+++ b/arch/arm/mm/tlb-v7.S
@@ -16,6 +16,8 @@
#include <asm/tlbflush.h>
#include "proc-macros.S"
+.arch armv7-a
+
/*
* v7wbi_flush_user_tlb_range(start, end, vma)
*
diff --git a/arch/arm/nwfpe/Makefile b/arch/arm/nwfpe/Makefile
index 303400fa2cdf..2aec85ab1e8b 100644
--- a/arch/arm/nwfpe/Makefile
+++ b/arch/arm/nwfpe/Makefile
@@ -11,3 +11,9 @@ nwfpe-y += fpa11.o fpa11_cpdo.o fpa11_cpdt.o \
entry.o
nwfpe-$(CONFIG_FPE_NWFPE_XP) += extended_cpdo.o
+
+# Try really hard to avoid generating calls to __aeabi_uldivmod() from
+# float64_rem() due to loop elision.
+ifdef CONFIG_CC_IS_CLANG
+CFLAGS_softfloat.o += -mllvm -replexitval=never
+endif
diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile
index 8ca1c9f262a2..a7ec06ce3785 100644
--- a/arch/arm/vdso/Makefile
+++ b/arch/arm/vdso/Makefile
@@ -37,6 +37,7 @@ endif
# Disable gcov profiling for VDSO code
GCOV_PROFILE := n
+UBSAN_SANITIZE := n
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 2cb355c1b5b7..281110423871 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -774,6 +774,7 @@ static int __init vfp_init(void)
{
unsigned int vfpsid;
unsigned int cpu_arch = cpu_architecture();
+ unsigned int isar6;
/*
* Enable the access to the VFP on all online CPUs so the
@@ -831,7 +832,38 @@ static int __init vfp_init(void)
if ((fmrx(MVFR1) & 0xf0000000) == 0x10000000)
elf_hwcap |= HWCAP_VFPv4;
+ if (((fmrx(MVFR1) & MVFR1_ASIMDHP_MASK) >> MVFR1_ASIMDHP_BIT) == 0x2)
+ elf_hwcap |= HWCAP_ASIMDHP;
+ if (((fmrx(MVFR1) & MVFR1_FPHP_MASK) >> MVFR1_FPHP_BIT) == 0x3)
+ elf_hwcap |= HWCAP_FPHP;
}
+
+ /*
+ * Check for the presence of Advanced SIMD Dot Product
+ * instructions.
+ */
+ isar6 = read_cpuid_ext(CPUID_EXT_ISAR6);
+ if (cpuid_feature_extract_field(isar6, 4) == 0x1)
+ elf_hwcap |= HWCAP_ASIMDDP;
+ /*
+ * Check for the presence of Advanced SIMD Floating point
+ * half-precision multiplication instructions.
+ */
+ if (cpuid_feature_extract_field(isar6, 8) == 0x1)
+ elf_hwcap |= HWCAP_ASIMDFHM;
+ /*
+ * Check for the presence of Advanced SIMD Bfloat16
+ * floating point instructions.
+ */
+ if (cpuid_feature_extract_field(isar6, 20) == 0x1)
+ elf_hwcap |= HWCAP_ASIMDBF16;
+ /*
+ * Check for the presence of Advanced SIMD and floating point
+ * Int8 matrix multiplication instructions instructions.
+ */
+ if (cpuid_feature_extract_field(isar6, 24) == 0x1)
+ elf_hwcap |= HWCAP_I8MM;
+
/* Extract the architecture version on pre-cpuid scheme */
} else {
if (vfpsid & FPSID_NODOUBLE) {