Merge branch 'x86-atomic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/atomic changes from Ingo Molnar. * 'x86-atomic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86: atomic64 assembly improvements x86: Adjust asm constraints in atomic64 wrappers
This commit is contained in:
commit
1b674bf106
|
@ -145,6 +145,12 @@ static inline int alternatives_text_reserved(void *start, void *end)
|
|||
*/
|
||||
#define ASM_OUTPUT2(a...) a
|
||||
|
||||
/*
|
||||
* use this macro if you need clobbers but no inputs in
|
||||
* alternative_{input,io,call}()
|
||||
*/
|
||||
#define ASM_NO_INPUT_CLOBBER(clbr...) "i" (0) : clbr
|
||||
|
||||
struct paravirt_patch_site;
|
||||
#ifdef CONFIG_PARAVIRT
|
||||
void apply_paravirt(struct paravirt_patch_site *start,
|
||||
|
|
|
@ -14,13 +14,52 @@ typedef struct {
|
|||
|
||||
#define ATOMIC64_INIT(val) { (val) }
|
||||
|
||||
#ifdef CONFIG_X86_CMPXCHG64
|
||||
#define ATOMIC64_ALTERNATIVE_(f, g) "call atomic64_" #g "_cx8"
|
||||
#define __ATOMIC64_DECL(sym) void atomic64_##sym(atomic64_t *, ...)
|
||||
#ifndef ATOMIC64_EXPORT
|
||||
#define ATOMIC64_DECL_ONE __ATOMIC64_DECL
|
||||
#else
|
||||
#define ATOMIC64_ALTERNATIVE_(f, g) ALTERNATIVE("call atomic64_" #f "_386", "call atomic64_" #g "_cx8", X86_FEATURE_CX8)
|
||||
#define ATOMIC64_DECL_ONE(sym) __ATOMIC64_DECL(sym); \
|
||||
ATOMIC64_EXPORT(atomic64_##sym)
|
||||
#endif
|
||||
|
||||
#define ATOMIC64_ALTERNATIVE(f) ATOMIC64_ALTERNATIVE_(f, f)
|
||||
#ifdef CONFIG_X86_CMPXCHG64
|
||||
#define __alternative_atomic64(f, g, out, in...) \
|
||||
asm volatile("call %P[func]" \
|
||||
: out : [func] "i" (atomic64_##g##_cx8), ## in)
|
||||
|
||||
#define ATOMIC64_DECL(sym) ATOMIC64_DECL_ONE(sym##_cx8)
|
||||
#else
|
||||
#define __alternative_atomic64(f, g, out, in...) \
|
||||
alternative_call(atomic64_##f##_386, atomic64_##g##_cx8, \
|
||||
X86_FEATURE_CX8, ASM_OUTPUT2(out), ## in)
|
||||
|
||||
#define ATOMIC64_DECL(sym) ATOMIC64_DECL_ONE(sym##_cx8); \
|
||||
ATOMIC64_DECL_ONE(sym##_386)
|
||||
|
||||
ATOMIC64_DECL_ONE(add_386);
|
||||
ATOMIC64_DECL_ONE(sub_386);
|
||||
ATOMIC64_DECL_ONE(inc_386);
|
||||
ATOMIC64_DECL_ONE(dec_386);
|
||||
#endif
|
||||
|
||||
#define alternative_atomic64(f, out, in...) \
|
||||
__alternative_atomic64(f, f, ASM_OUTPUT2(out), ## in)
|
||||
|
||||
ATOMIC64_DECL(read);
|
||||
ATOMIC64_DECL(set);
|
||||
ATOMIC64_DECL(xchg);
|
||||
ATOMIC64_DECL(add_return);
|
||||
ATOMIC64_DECL(sub_return);
|
||||
ATOMIC64_DECL(inc_return);
|
||||
ATOMIC64_DECL(dec_return);
|
||||
ATOMIC64_DECL(dec_if_positive);
|
||||
ATOMIC64_DECL(inc_not_zero);
|
||||
ATOMIC64_DECL(add_unless);
|
||||
|
||||
#undef ATOMIC64_DECL
|
||||
#undef ATOMIC64_DECL_ONE
|
||||
#undef __ATOMIC64_DECL
|
||||
#undef ATOMIC64_EXPORT
|
||||
|
||||
/**
|
||||
* atomic64_cmpxchg - cmpxchg atomic64 variable
|
||||
|
@ -50,11 +89,9 @@ static inline long long atomic64_xchg(atomic64_t *v, long long n)
|
|||
long long o;
|
||||
unsigned high = (unsigned)(n >> 32);
|
||||
unsigned low = (unsigned)n;
|
||||
asm volatile(ATOMIC64_ALTERNATIVE(xchg)
|
||||
: "=A" (o), "+b" (low), "+c" (high)
|
||||
: "S" (v)
|
||||
: "memory"
|
||||
);
|
||||
alternative_atomic64(xchg, "=&A" (o),
|
||||
"S" (v), "b" (low), "c" (high)
|
||||
: "memory");
|
||||
return o;
|
||||
}
|
||||
|
||||
|
@ -69,11 +106,9 @@ static inline void atomic64_set(atomic64_t *v, long long i)
|
|||
{
|
||||
unsigned high = (unsigned)(i >> 32);
|
||||
unsigned low = (unsigned)i;
|
||||
asm volatile(ATOMIC64_ALTERNATIVE(set)
|
||||
: "+b" (low), "+c" (high)
|
||||
: "S" (v)
|
||||
: "eax", "edx", "memory"
|
||||
);
|
||||
alternative_atomic64(set, /* no output */,
|
||||
"S" (v), "b" (low), "c" (high)
|
||||
: "eax", "edx", "memory");
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -85,10 +120,7 @@ static inline void atomic64_set(atomic64_t *v, long long i)
|
|||
static inline long long atomic64_read(const atomic64_t *v)
|
||||
{
|
||||
long long r;
|
||||
asm volatile(ATOMIC64_ALTERNATIVE(read)
|
||||
: "=A" (r), "+c" (v)
|
||||
: : "memory"
|
||||
);
|
||||
alternative_atomic64(read, "=&A" (r), "c" (v) : "memory");
|
||||
return r;
|
||||
}
|
||||
|
||||
|
@ -101,10 +133,9 @@ static inline long long atomic64_read(const atomic64_t *v)
|
|||
*/
|
||||
static inline long long atomic64_add_return(long long i, atomic64_t *v)
|
||||
{
|
||||
asm volatile(ATOMIC64_ALTERNATIVE(add_return)
|
||||
: "+A" (i), "+c" (v)
|
||||
: : "memory"
|
||||
);
|
||||
alternative_atomic64(add_return,
|
||||
ASM_OUTPUT2("+A" (i), "+c" (v)),
|
||||
ASM_NO_INPUT_CLOBBER("memory"));
|
||||
return i;
|
||||
}
|
||||
|
||||
|
@ -113,32 +144,25 @@ static inline long long atomic64_add_return(long long i, atomic64_t *v)
|
|||
*/
|
||||
static inline long long atomic64_sub_return(long long i, atomic64_t *v)
|
||||
{
|
||||
asm volatile(ATOMIC64_ALTERNATIVE(sub_return)
|
||||
: "+A" (i), "+c" (v)
|
||||
: : "memory"
|
||||
);
|
||||
alternative_atomic64(sub_return,
|
||||
ASM_OUTPUT2("+A" (i), "+c" (v)),
|
||||
ASM_NO_INPUT_CLOBBER("memory"));
|
||||
return i;
|
||||
}
|
||||
|
||||
static inline long long atomic64_inc_return(atomic64_t *v)
|
||||
{
|
||||
long long a;
|
||||
asm volatile(ATOMIC64_ALTERNATIVE(inc_return)
|
||||
: "=A" (a)
|
||||
: "S" (v)
|
||||
: "memory", "ecx"
|
||||
);
|
||||
alternative_atomic64(inc_return, "=&A" (a),
|
||||
"S" (v) : "memory", "ecx");
|
||||
return a;
|
||||
}
|
||||
|
||||
static inline long long atomic64_dec_return(atomic64_t *v)
|
||||
{
|
||||
long long a;
|
||||
asm volatile(ATOMIC64_ALTERNATIVE(dec_return)
|
||||
: "=A" (a)
|
||||
: "S" (v)
|
||||
: "memory", "ecx"
|
||||
);
|
||||
alternative_atomic64(dec_return, "=&A" (a),
|
||||
"S" (v) : "memory", "ecx");
|
||||
return a;
|
||||
}
|
||||
|
||||
|
@ -151,10 +175,9 @@ static inline long long atomic64_dec_return(atomic64_t *v)
|
|||
*/
|
||||
static inline long long atomic64_add(long long i, atomic64_t *v)
|
||||
{
|
||||
asm volatile(ATOMIC64_ALTERNATIVE_(add, add_return)
|
||||
: "+A" (i), "+c" (v)
|
||||
: : "memory"
|
||||
);
|
||||
__alternative_atomic64(add, add_return,
|
||||
ASM_OUTPUT2("+A" (i), "+c" (v)),
|
||||
ASM_NO_INPUT_CLOBBER("memory"));
|
||||
return i;
|
||||
}
|
||||
|
||||
|
@ -167,10 +190,9 @@ static inline long long atomic64_add(long long i, atomic64_t *v)
|
|||
*/
|
||||
static inline long long atomic64_sub(long long i, atomic64_t *v)
|
||||
{
|
||||
asm volatile(ATOMIC64_ALTERNATIVE_(sub, sub_return)
|
||||
: "+A" (i), "+c" (v)
|
||||
: : "memory"
|
||||
);
|
||||
__alternative_atomic64(sub, sub_return,
|
||||
ASM_OUTPUT2("+A" (i), "+c" (v)),
|
||||
ASM_NO_INPUT_CLOBBER("memory"));
|
||||
return i;
|
||||
}
|
||||
|
||||
|
@ -196,10 +218,8 @@ static inline int atomic64_sub_and_test(long long i, atomic64_t *v)
|
|||
*/
|
||||
static inline void atomic64_inc(atomic64_t *v)
|
||||
{
|
||||
asm volatile(ATOMIC64_ALTERNATIVE_(inc, inc_return)
|
||||
: : "S" (v)
|
||||
: "memory", "eax", "ecx", "edx"
|
||||
);
|
||||
__alternative_atomic64(inc, inc_return, /* no output */,
|
||||
"S" (v) : "memory", "eax", "ecx", "edx");
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -210,10 +230,8 @@ static inline void atomic64_inc(atomic64_t *v)
|
|||
*/
|
||||
static inline void atomic64_dec(atomic64_t *v)
|
||||
{
|
||||
asm volatile(ATOMIC64_ALTERNATIVE_(dec, dec_return)
|
||||
: : "S" (v)
|
||||
: "memory", "eax", "ecx", "edx"
|
||||
);
|
||||
__alternative_atomic64(dec, dec_return, /* no output */,
|
||||
"S" (v) : "memory", "eax", "ecx", "edx");
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -263,15 +281,15 @@ static inline int atomic64_add_negative(long long i, atomic64_t *v)
|
|||
* @u: ...unless v is equal to u.
|
||||
*
|
||||
* Atomically adds @a to @v, so long as it was not @u.
|
||||
* Returns the old value of @v.
|
||||
* Returns non-zero if the add was done, zero otherwise.
|
||||
*/
|
||||
static inline int atomic64_add_unless(atomic64_t *v, long long a, long long u)
|
||||
{
|
||||
unsigned low = (unsigned)u;
|
||||
unsigned high = (unsigned)(u >> 32);
|
||||
asm volatile(ATOMIC64_ALTERNATIVE(add_unless) "\n\t"
|
||||
: "+A" (a), "+c" (v), "+S" (low), "+D" (high)
|
||||
: : "memory");
|
||||
alternative_atomic64(add_unless,
|
||||
ASM_OUTPUT2("+A" (a), "+c" (low), "+D" (high)),
|
||||
"S" (v) : "memory");
|
||||
return (int)a;
|
||||
}
|
||||
|
||||
|
@ -279,26 +297,20 @@ static inline int atomic64_add_unless(atomic64_t *v, long long a, long long u)
|
|||
static inline int atomic64_inc_not_zero(atomic64_t *v)
|
||||
{
|
||||
int r;
|
||||
asm volatile(ATOMIC64_ALTERNATIVE(inc_not_zero)
|
||||
: "=a" (r)
|
||||
: "S" (v)
|
||||
: "ecx", "edx", "memory"
|
||||
);
|
||||
alternative_atomic64(inc_not_zero, "=&a" (r),
|
||||
"S" (v) : "ecx", "edx", "memory");
|
||||
return r;
|
||||
}
|
||||
|
||||
static inline long long atomic64_dec_if_positive(atomic64_t *v)
|
||||
{
|
||||
long long r;
|
||||
asm volatile(ATOMIC64_ALTERNATIVE(dec_if_positive)
|
||||
: "=A" (r)
|
||||
: "S" (v)
|
||||
: "ecx", "memory"
|
||||
);
|
||||
alternative_atomic64(dec_if_positive, "=&A" (r),
|
||||
"S" (v) : "ecx", "memory");
|
||||
return r;
|
||||
}
|
||||
|
||||
#undef ATOMIC64_ALTERNATIVE
|
||||
#undef ATOMIC64_ALTERNATIVE_
|
||||
#undef alternative_atomic64
|
||||
#undef __alternative_atomic64
|
||||
|
||||
#endif /* _ASM_X86_ATOMIC64_32_H */
|
||||
|
|
|
@ -1,59 +1,4 @@
|
|||
#include <linux/compiler.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/types.h>
|
||||
#define ATOMIC64_EXPORT EXPORT_SYMBOL
|
||||
|
||||
#include <asm/processor.h>
|
||||
#include <asm/cmpxchg.h>
|
||||
#include <linux/export.h>
|
||||
#include <linux/atomic.h>
|
||||
|
||||
long long atomic64_read_cx8(long long, const atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_read_cx8);
|
||||
long long atomic64_set_cx8(long long, const atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_set_cx8);
|
||||
long long atomic64_xchg_cx8(long long, unsigned high);
|
||||
EXPORT_SYMBOL(atomic64_xchg_cx8);
|
||||
long long atomic64_add_return_cx8(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_add_return_cx8);
|
||||
long long atomic64_sub_return_cx8(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_sub_return_cx8);
|
||||
long long atomic64_inc_return_cx8(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_inc_return_cx8);
|
||||
long long atomic64_dec_return_cx8(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_dec_return_cx8);
|
||||
long long atomic64_dec_if_positive_cx8(atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_dec_if_positive_cx8);
|
||||
int atomic64_inc_not_zero_cx8(atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_inc_not_zero_cx8);
|
||||
int atomic64_add_unless_cx8(atomic64_t *v, long long a, long long u);
|
||||
EXPORT_SYMBOL(atomic64_add_unless_cx8);
|
||||
|
||||
#ifndef CONFIG_X86_CMPXCHG64
|
||||
long long atomic64_read_386(long long, const atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_read_386);
|
||||
long long atomic64_set_386(long long, const atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_set_386);
|
||||
long long atomic64_xchg_386(long long, unsigned high);
|
||||
EXPORT_SYMBOL(atomic64_xchg_386);
|
||||
long long atomic64_add_return_386(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_add_return_386);
|
||||
long long atomic64_sub_return_386(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_sub_return_386);
|
||||
long long atomic64_inc_return_386(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_inc_return_386);
|
||||
long long atomic64_dec_return_386(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_dec_return_386);
|
||||
long long atomic64_add_386(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_add_386);
|
||||
long long atomic64_sub_386(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_sub_386);
|
||||
long long atomic64_inc_386(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_inc_386);
|
||||
long long atomic64_dec_386(long long a, atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_dec_386);
|
||||
long long atomic64_dec_if_positive_386(atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_dec_if_positive_386);
|
||||
int atomic64_inc_not_zero_386(atomic64_t *v);
|
||||
EXPORT_SYMBOL(atomic64_inc_not_zero_386);
|
||||
int atomic64_add_unless_386(atomic64_t *v, long long a, long long u);
|
||||
EXPORT_SYMBOL(atomic64_add_unless_386);
|
||||
#endif
|
||||
|
|
|
@ -137,13 +137,13 @@ BEGIN(dec_return)
|
|||
RET_ENDP
|
||||
#undef v
|
||||
|
||||
#define v %ecx
|
||||
#define v %esi
|
||||
BEGIN(add_unless)
|
||||
addl %eax, %esi
|
||||
addl %eax, %ecx
|
||||
adcl %edx, %edi
|
||||
addl (v), %eax
|
||||
adcl 4(v), %edx
|
||||
cmpl %eax, %esi
|
||||
cmpl %eax, %ecx
|
||||
je 3f
|
||||
1:
|
||||
movl %eax, (v)
|
||||
|
|
|
@ -55,8 +55,6 @@ ENDPROC(atomic64_set_cx8)
|
|||
ENTRY(atomic64_xchg_cx8)
|
||||
CFI_STARTPROC
|
||||
|
||||
movl %ebx, %eax
|
||||
movl %ecx, %edx
|
||||
1:
|
||||
LOCK_PREFIX
|
||||
cmpxchg8b (%esi)
|
||||
|
@ -78,7 +76,7 @@ ENTRY(atomic64_\func\()_return_cx8)
|
|||
movl %edx, %edi
|
||||
movl %ecx, %ebp
|
||||
|
||||
read64 %ebp
|
||||
read64 %ecx
|
||||
1:
|
||||
movl %eax, %ebx
|
||||
movl %edx, %ecx
|
||||
|
@ -159,23 +157,22 @@ ENTRY(atomic64_add_unless_cx8)
|
|||
SAVE ebx
|
||||
/* these just push these two parameters on the stack */
|
||||
SAVE edi
|
||||
SAVE esi
|
||||
SAVE ecx
|
||||
|
||||
movl %ecx, %ebp
|
||||
movl %eax, %esi
|
||||
movl %eax, %ebp
|
||||
movl %edx, %edi
|
||||
|
||||
read64 %ebp
|
||||
read64 %esi
|
||||
1:
|
||||
cmpl %eax, 0(%esp)
|
||||
je 4f
|
||||
2:
|
||||
movl %eax, %ebx
|
||||
movl %edx, %ecx
|
||||
addl %esi, %ebx
|
||||
addl %ebp, %ebx
|
||||
adcl %edi, %ecx
|
||||
LOCK_PREFIX
|
||||
cmpxchg8b (%ebp)
|
||||
cmpxchg8b (%esi)
|
||||
jne 1b
|
||||
|
||||
movl $1, %eax
|
||||
|
@ -199,13 +196,13 @@ ENTRY(atomic64_inc_not_zero_cx8)
|
|||
|
||||
read64 %esi
|
||||
1:
|
||||
testl %eax, %eax
|
||||
je 4f
|
||||
2:
|
||||
movl %eax, %ecx
|
||||
orl %edx, %ecx
|
||||
jz 3f
|
||||
movl %eax, %ebx
|
||||
movl %edx, %ecx
|
||||
xorl %ecx, %ecx
|
||||
addl $1, %ebx
|
||||
adcl $0, %ecx
|
||||
adcl %edx, %ecx
|
||||
LOCK_PREFIX
|
||||
cmpxchg8b (%esi)
|
||||
jne 1b
|
||||
|
@ -214,9 +211,5 @@ ENTRY(atomic64_inc_not_zero_cx8)
|
|||
3:
|
||||
RESTORE ebx
|
||||
ret
|
||||
4:
|
||||
testl %edx, %edx
|
||||
jne 2b
|
||||
jmp 3b
|
||||
CFI_ENDPROC
|
||||
ENDPROC(atomic64_inc_not_zero_cx8)
|
||||
|
|
Loading…
Reference in New Issue