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-rw-r--r--arch/s390/Kconfig2
-rw-r--r--arch/s390/include/asm/ccwgroup.h2
-rw-r--r--arch/s390/include/asm/chsc.h2
-rw-r--r--arch/s390/include/asm/eadm.h2
-rw-r--r--arch/s390/include/asm/extable.h9
-rw-r--r--arch/s390/include/asm/fcx.h4
-rw-r--r--arch/s390/include/asm/ftrace.h10
-rw-r--r--arch/s390/include/asm/idals.h2
-rw-r--r--arch/s390/include/asm/ptrace.h2
-rw-r--r--arch/s390/include/asm/sclp.h2
-rw-r--r--arch/s390/include/asm/sysinfo.h6
-rw-r--r--arch/s390/include/asm/uaccess.h16
-rw-r--r--arch/s390/include/uapi/asm/signal.h2
-rw-r--r--arch/s390/kernel/ftrace.c37
-rw-r--r--arch/s390/kernel/mcount.S9
-rw-r--r--arch/s390/kernel/numa.c7
-rw-r--r--arch/s390/kernel/setup.c2
-rw-r--r--arch/s390/lib/test_modules.c3
-rw-r--r--arch/s390/lib/test_modules.h3
-rw-r--r--arch/s390/lib/xor.c21
20 files changed, 93 insertions, 50 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index be9f39fd06df..2e11ef97c8b9 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -55,11 +55,13 @@ config S390
# Note: keep this list sorted alphabetically
#
imply IMA_SECURE_AND_OR_TRUSTED_BOOT
+ select ALTERNATE_USER_ADDRESS_SPACE
select ARCH_32BIT_USTAT_F_TINODE
select ARCH_BINFMT_ELF_STATE
select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM
select ARCH_ENABLE_MEMORY_HOTREMOVE
select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
+ select ARCH_HAS_CURRENT_STACK_POINTER
select ARCH_HAS_DEBUG_VM_PGTABLE
select ARCH_HAS_DEBUG_WX
select ARCH_HAS_DEVMEM_IS_ALLOWED
diff --git a/arch/s390/include/asm/ccwgroup.h b/arch/s390/include/asm/ccwgroup.h
index aa995d91cd1d..11d2fb3de4f5 100644
--- a/arch/s390/include/asm/ccwgroup.h
+++ b/arch/s390/include/asm/ccwgroup.h
@@ -25,7 +25,7 @@ struct ccwgroup_device {
unsigned int count;
struct device dev;
struct work_struct ungroup_work;
- struct ccw_device *cdev[0];
+ struct ccw_device *cdev[];
};
/**
diff --git a/arch/s390/include/asm/chsc.h b/arch/s390/include/asm/chsc.h
index ae4d2549cd67..bb48ea380c0d 100644
--- a/arch/s390/include/asm/chsc.h
+++ b/arch/s390/include/asm/chsc.h
@@ -63,7 +63,7 @@ struct chsc_pnso_area {
struct chsc_header response;
u32:32;
struct chsc_pnso_naihdr naihdr;
- struct chsc_pnso_naid_l2 entries[0];
+ struct chsc_pnso_naid_l2 entries[];
} __packed __aligned(PAGE_SIZE);
#endif /* _ASM_S390_CHSC_H */
diff --git a/arch/s390/include/asm/eadm.h b/arch/s390/include/asm/eadm.h
index 445fe4c8184a..06f795855af7 100644
--- a/arch/s390/include/asm/eadm.h
+++ b/arch/s390/include/asm/eadm.h
@@ -78,7 +78,7 @@ struct aob {
struct aob_rq_header {
struct scm_device *scmdev;
- char data[0];
+ char data[];
};
struct scm_device {
diff --git a/arch/s390/include/asm/extable.h b/arch/s390/include/asm/extable.h
index 16dc57dd90b3..8511f0e59290 100644
--- a/arch/s390/include/asm/extable.h
+++ b/arch/s390/include/asm/extable.h
@@ -69,8 +69,13 @@ static inline void swap_ex_entry_fixup(struct exception_table_entry *a,
{
a->fixup = b->fixup + delta;
b->fixup = tmp.fixup - delta;
- a->handler = b->handler + delta;
- b->handler = tmp.handler - delta;
+ a->handler = b->handler;
+ if (a->handler)
+ a->handler += delta;
+ b->handler = tmp.handler;
+ if (b->handler)
+ b->handler -= delta;
}
+#define swap_ex_entry_fixup swap_ex_entry_fixup
#endif
diff --git a/arch/s390/include/asm/fcx.h b/arch/s390/include/asm/fcx.h
index cff0749e9657..b8a028a36173 100644
--- a/arch/s390/include/asm/fcx.h
+++ b/arch/s390/include/asm/fcx.h
@@ -214,7 +214,7 @@ struct dcw_intrg_data {
u32 :32;
u64 time;
u64 prog_id;
- u8 prog_data[0];
+ u8 prog_data[];
} __attribute__ ((packed));
#define DCW_FLAGS_CC (1 << (7 - 1))
@@ -241,7 +241,7 @@ struct dcw {
u32 :8;
u32 cd_count:8;
u32 count;
- u8 cd[0];
+ u8 cd[];
} __attribute__ ((packed));
#define TCCB_FORMAT_DEFAULT 0x7f
diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h
index 267f70f4393f..6f80ec9c04be 100644
--- a/arch/s390/include/asm/ftrace.h
+++ b/arch/s390/include/asm/ftrace.h
@@ -47,15 +47,17 @@ struct ftrace_regs {
static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs)
{
- return &fregs->regs;
+ struct pt_regs *regs = &fregs->regs;
+
+ if (test_pt_regs_flag(regs, PIF_FTRACE_FULL_REGS))
+ return regs;
+ return NULL;
}
static __always_inline void ftrace_instruction_pointer_set(struct ftrace_regs *fregs,
unsigned long ip)
{
- struct pt_regs *regs = arch_ftrace_get_regs(fregs);
-
- regs->psw.addr = ip;
+ fregs->regs.psw.addr = ip;
}
/*
diff --git a/arch/s390/include/asm/idals.h b/arch/s390/include/asm/idals.h
index 6fb7aced104a..40eae2c08d61 100644
--- a/arch/s390/include/asm/idals.h
+++ b/arch/s390/include/asm/idals.h
@@ -108,7 +108,7 @@ clear_normalized_cda(struct ccw1 * ccw)
struct idal_buffer {
size_t size;
size_t page_order;
- void *data[0];
+ void *data[];
};
/*
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index 4ffa8e7f0ed3..ddb70fb13fbc 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -15,11 +15,13 @@
#define PIF_EXECVE_PGSTE_RESTART 1 /* restart execve for PGSTE binaries */
#define PIF_SYSCALL_RET_SET 2 /* return value was set via ptrace */
#define PIF_GUEST_FAULT 3 /* indicates program check in sie64a */
+#define PIF_FTRACE_FULL_REGS 4 /* all register contents valid (ftrace) */
#define _PIF_SYSCALL BIT(PIF_SYSCALL)
#define _PIF_EXECVE_PGSTE_RESTART BIT(PIF_EXECVE_PGSTE_RESTART)
#define _PIF_SYSCALL_RET_SET BIT(PIF_SYSCALL_RET_SET)
#define _PIF_GUEST_FAULT BIT(PIF_GUEST_FAULT)
+#define _PIF_FTRACE_FULL_REGS BIT(PIF_FTRACE_FULL_REGS)
#ifndef __ASSEMBLY__
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index c68ea35de498..22b3213c6c9d 100644
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -112,7 +112,7 @@ struct zpci_report_error_header {
* (OpenCrypto Successful Diagnostics Execution)
*/
u16 length; /* Length of Subsequent Data (up to 4K – SCLP header */
- u8 data[0]; /* Subsequent Data passed verbatim to SCLP ET 24 */
+ u8 data[]; /* Subsequent Data passed verbatim to SCLP ET 24 */
} __packed;
extern char *sclp_early_sccb;
diff --git a/arch/s390/include/asm/sysinfo.h b/arch/s390/include/asm/sysinfo.h
index fe7b3f8f0791..ab1c6316055c 100644
--- a/arch/s390/include/asm/sysinfo.h
+++ b/arch/s390/include/asm/sysinfo.h
@@ -67,12 +67,12 @@ struct sysinfo_1_2_2 {
unsigned short cpus_configured;
unsigned short cpus_standby;
unsigned short cpus_reserved;
- unsigned short adjustment[0];
+ unsigned short adjustment[];
};
struct sysinfo_1_2_2_extension {
unsigned int alt_capability;
- unsigned short alt_adjustment[0];
+ unsigned short alt_adjustment[];
};
struct sysinfo_2_2_1 {
@@ -181,7 +181,7 @@ struct sysinfo_15_1_x {
unsigned char reserved1;
unsigned char mnest;
unsigned char reserved2[4];
- union topology_entry tle[0];
+ union topology_entry tle[];
};
int stsi(void *sysinfo, int fc, int sel1, int sel2);
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index ba1bcb91af95..e1be769cbf9f 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -17,22 +17,10 @@
#include <asm/ctl_reg.h>
#include <asm/extable.h>
#include <asm/facility.h>
+#include <asm-generic/access_ok.h>
void debug_user_asce(int exit);
-static inline int __range_ok(unsigned long addr, unsigned long size)
-{
- return 1;
-}
-
-#define __access_ok(addr, size) \
-({ \
- __chk_user_ptr(addr); \
- __range_ok((unsigned long)(addr), (size)); \
-})
-
-#define access_ok(addr, size) __access_ok(addr, size)
-
unsigned long __must_check
raw_copy_from_user(void *to, const void __user *from, unsigned long n);
@@ -304,8 +292,6 @@ static inline unsigned long __must_check clear_user(void __user *to, unsigned lo
int copy_to_user_real(void __user *dest, void *src, unsigned long count);
void *s390_kernel_write(void *dst, const void *src, size_t size);
-#define HAVE_GET_KERNEL_NOFAULT
-
int __noreturn __put_kernel_bad(void);
#define __put_kernel_asm(val, to, insn) \
diff --git a/arch/s390/include/uapi/asm/signal.h b/arch/s390/include/uapi/asm/signal.h
index 0189f326aac5..e74d6ba1bd3b 100644
--- a/arch/s390/include/uapi/asm/signal.h
+++ b/arch/s390/include/uapi/asm/signal.h
@@ -108,7 +108,7 @@ struct sigaction {
typedef struct sigaltstack {
void __user *ss_sp;
int ss_flags;
- size_t ss_size;
+ __kernel_size_t ss_size;
} stack_t;
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 21d62d8b6b9a..89c0870d5679 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -159,9 +159,38 @@ int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec)
return 0;
}
+static struct ftrace_hotpatch_trampoline *ftrace_get_trampoline(struct dyn_ftrace *rec)
+{
+ struct ftrace_hotpatch_trampoline *trampoline;
+ struct ftrace_insn insn;
+ s64 disp;
+ u16 opc;
+
+ if (copy_from_kernel_nofault(&insn, (void *)rec->ip, sizeof(insn)))
+ return ERR_PTR(-EFAULT);
+ disp = (s64)insn.disp * 2;
+ trampoline = (void *)(rec->ip + disp);
+ if (get_kernel_nofault(opc, &trampoline->brasl_opc))
+ return ERR_PTR(-EFAULT);
+ if (opc != 0xc015)
+ return ERR_PTR(-EINVAL);
+ return trampoline;
+}
+
int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
unsigned long addr)
{
+ struct ftrace_hotpatch_trampoline *trampoline;
+ u64 old;
+
+ trampoline = ftrace_get_trampoline(rec);
+ if (IS_ERR(trampoline))
+ return PTR_ERR(trampoline);
+ if (get_kernel_nofault(old, &trampoline->interceptor))
+ return -EFAULT;
+ if (old != old_addr)
+ return -EINVAL;
+ s390_kernel_write(&trampoline->interceptor, &addr, sizeof(addr));
return 0;
}
@@ -188,6 +217,12 @@ static void brcl_enable(void *brcl)
int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
{
+ struct ftrace_hotpatch_trampoline *trampoline;
+
+ trampoline = ftrace_get_trampoline(rec);
+ if (IS_ERR(trampoline))
+ return PTR_ERR(trampoline);
+ s390_kernel_write(&trampoline->interceptor, &addr, sizeof(addr));
brcl_enable((void *)rec->ip);
return 0;
}
@@ -291,7 +326,7 @@ void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip,
regs = ftrace_get_regs(fregs);
p = get_kprobe((kprobe_opcode_t *)ip);
- if (unlikely(!p) || kprobe_disabled(p))
+ if (!regs || unlikely(!p) || kprobe_disabled(p))
goto out;
if (kprobe_running()) {
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S
index 39bcc0e39a10..a24177dcd12a 100644
--- a/arch/s390/kernel/mcount.S
+++ b/arch/s390/kernel/mcount.S
@@ -27,6 +27,7 @@ ENDPROC(ftrace_stub)
#define STACK_PTREGS_GPRS (STACK_PTREGS + __PT_GPRS)
#define STACK_PTREGS_PSW (STACK_PTREGS + __PT_PSW)
#define STACK_PTREGS_ORIG_GPR2 (STACK_PTREGS + __PT_ORIG_GPR2)
+#define STACK_PTREGS_FLAGS (STACK_PTREGS + __PT_FLAGS)
#ifdef __PACK_STACK
/* allocate just enough for r14, r15 and backchain */
#define TRACED_FUNC_FRAME_SIZE 24
@@ -57,6 +58,14 @@ ENDPROC(ftrace_stub)
.if \allregs == 1
stg %r14,(STACK_PTREGS_PSW)(%r15)
stosm (STACK_PTREGS_PSW)(%r15),0
+#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
+ mvghi STACK_PTREGS_FLAGS(%r15),_PIF_FTRACE_FULL_REGS
+#else
+ lghi %r14,_PIF_FTRACE_FULL_REGS
+ stg %r14,STACK_PTREGS_FLAGS(%r15)
+#endif
+ .else
+ xc STACK_PTREGS_FLAGS(8,%r15),STACK_PTREGS_FLAGS(%r15)
.endif
lg %r14,(__SF_GPRS+8*8)(%r1) # restore original return address
diff --git a/arch/s390/kernel/numa.c b/arch/s390/kernel/numa.c
index 51c5a9f6e525..23ab9f02f278 100644
--- a/arch/s390/kernel/numa.c
+++ b/arch/s390/kernel/numa.c
@@ -33,10 +33,3 @@ void __init numa_setup(void)
NODE_DATA(0)->node_spanned_pages = memblock_end_of_DRAM() >> PAGE_SHIFT;
NODE_DATA(0)->node_id = 0;
}
-
-static int __init numa_init_late(void)
-{
- register_one_node(0);
- return 0;
-}
-arch_initcall(numa_init_late);
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index f2c25d113e7b..05327be3a982 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -800,6 +800,8 @@ static void __init check_initrd(void)
static void __init reserve_kernel(void)
{
memblock_reserve(0, STARTUP_NORMAL_OFFSET);
+ memblock_reserve(OLDMEM_BASE, sizeof(unsigned long));
+ memblock_reserve(OLDMEM_SIZE, sizeof(unsigned long));
memblock_reserve(__amode31_base, __eamode31 - __samode31);
memblock_reserve(__pa(sclp_early_sccb), EXT_SCCB_READ_SCP);
memblock_reserve(__pa(_stext), _end - _stext);
diff --git a/arch/s390/lib/test_modules.c b/arch/s390/lib/test_modules.c
index d056baa8fbb0..9894009fc1f2 100644
--- a/arch/s390/lib/test_modules.c
+++ b/arch/s390/lib/test_modules.c
@@ -5,9 +5,6 @@
#include "test_modules.h"
-#define DECLARE_RETURN(i) int test_modules_return_ ## i(void)
-REPEAT_10000(DECLARE_RETURN);
-
/*
* Test that modules with many relocations are loaded properly.
*/
diff --git a/arch/s390/lib/test_modules.h b/arch/s390/lib/test_modules.h
index 43b5e4b4af3e..6371fcf17684 100644
--- a/arch/s390/lib/test_modules.h
+++ b/arch/s390/lib/test_modules.h
@@ -47,4 +47,7 @@
__REPEAT_10000_1(f, 8); \
__REPEAT_10000_1(f, 9)
+#define DECLARE_RETURN(i) int test_modules_return_ ## i(void)
+REPEAT_10000(DECLARE_RETURN);
+
#endif
diff --git a/arch/s390/lib/xor.c b/arch/s390/lib/xor.c
index a963c3d8ad0d..fb924a8041dc 100644
--- a/arch/s390/lib/xor.c
+++ b/arch/s390/lib/xor.c
@@ -11,7 +11,8 @@
#include <linux/raid/xor.h>
#include <asm/xor.h>
-static void xor_xc_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
+static void xor_xc_2(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2)
{
asm volatile(
" larl 1,2f\n"
@@ -32,8 +33,9 @@ static void xor_xc_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
: "0", "1", "cc", "memory");
}
-static void xor_xc_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
- unsigned long *p3)
+static void xor_xc_3(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3)
{
asm volatile(
" larl 1,2f\n"
@@ -58,8 +60,10 @@ static void xor_xc_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
: : "0", "1", "cc", "memory");
}
-static void xor_xc_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
- unsigned long *p3, unsigned long *p4)
+static void xor_xc_4(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3,
+ const unsigned long * __restrict p4)
{
asm volatile(
" larl 1,2f\n"
@@ -88,8 +92,11 @@ static void xor_xc_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
: : "0", "1", "cc", "memory");
}
-static void xor_xc_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
- unsigned long *p3, unsigned long *p4, unsigned long *p5)
+static void xor_xc_5(unsigned long bytes, unsigned long * __restrict p1,
+ const unsigned long * __restrict p2,
+ const unsigned long * __restrict p3,
+ const unsigned long * __restrict p4,
+ const unsigned long * __restrict p5)
{
asm volatile(
" larl 1,2f\n"
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-07 11:27:41 +0300