diff options
Diffstat (limited to 'arch/x86/lib')
| -rw-r--r-- | arch/x86/lib/msr-on-cpu.c | 78 | ||||
| -rw-r--r-- | arch/x86/lib/string_32.c | 42 | ||||
| -rw-r--r-- | arch/x86/lib/strstr_32.c | 6 |
3 files changed, 60 insertions, 66 deletions
diff --git a/arch/x86/lib/msr-on-cpu.c b/arch/x86/lib/msr-on-cpu.c index 01b868ba82f8..321cf720dbb6 100644 --- a/arch/x86/lib/msr-on-cpu.c +++ b/arch/x86/lib/msr-on-cpu.c | |||
| @@ -16,37 +16,46 @@ static void __rdmsr_on_cpu(void *info) | |||
| 16 | rdmsr(rv->msr_no, rv->l, rv->h); | 16 | rdmsr(rv->msr_no, rv->l, rv->h); |
| 17 | } | 17 | } |
| 18 | 18 | ||
| 19 | static void __rdmsr_safe_on_cpu(void *info) | 19 | static void __wrmsr_on_cpu(void *info) |
| 20 | { | 20 | { |
| 21 | struct msr_info *rv = info; | 21 | struct msr_info *rv = info; |
| 22 | 22 | ||
| 23 | rv->err = rdmsr_safe(rv->msr_no, &rv->l, &rv->h); | 23 | wrmsr(rv->msr_no, rv->l, rv->h); |
| 24 | } | 24 | } |
| 25 | 25 | ||
| 26 | static int _rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h, int safe) | 26 | int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) |
| 27 | { | 27 | { |
| 28 | int err = 0; | 28 | int err; |
| 29 | struct msr_info rv; | 29 | struct msr_info rv; |
| 30 | 30 | ||
| 31 | rv.msr_no = msr_no; | 31 | rv.msr_no = msr_no; |
| 32 | if (safe) { | 32 | err = smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 1); |
| 33 | err = smp_call_function_single(cpu, __rdmsr_safe_on_cpu, | ||
| 34 | &rv, 1); | ||
| 35 | err = err ? err : rv.err; | ||
| 36 | } else { | ||
| 37 | err = smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 1); | ||
| 38 | } | ||
| 39 | *l = rv.l; | 33 | *l = rv.l; |
| 40 | *h = rv.h; | 34 | *h = rv.h; |
| 41 | 35 | ||
| 42 | return err; | 36 | return err; |
| 43 | } | 37 | } |
| 44 | 38 | ||
| 45 | static void __wrmsr_on_cpu(void *info) | 39 | int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) |
| 40 | { | ||
| 41 | int err; | ||
| 42 | struct msr_info rv; | ||
| 43 | |||
| 44 | rv.msr_no = msr_no; | ||
| 45 | rv.l = l; | ||
| 46 | rv.h = h; | ||
| 47 | err = smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1); | ||
| 48 | |||
| 49 | return err; | ||
| 50 | } | ||
| 51 | |||
| 52 | /* These "safe" variants are slower and should be used when the target MSR | ||
| 53 | may not actually exist. */ | ||
| 54 | static void __rdmsr_safe_on_cpu(void *info) | ||
| 46 | { | 55 | { |
| 47 | struct msr_info *rv = info; | 56 | struct msr_info *rv = info; |
| 48 | 57 | ||
| 49 | wrmsr(rv->msr_no, rv->l, rv->h); | 58 | rv->err = rdmsr_safe(rv->msr_no, &rv->l, &rv->h); |
| 50 | } | 59 | } |
| 51 | 60 | ||
| 52 | static void __wrmsr_safe_on_cpu(void *info) | 61 | static void __wrmsr_safe_on_cpu(void *info) |
| @@ -56,45 +65,30 @@ static void __wrmsr_safe_on_cpu(void *info) | |||
| 56 | rv->err = wrmsr_safe(rv->msr_no, rv->l, rv->h); | 65 | rv->err = wrmsr_safe(rv->msr_no, rv->l, rv->h); |
| 57 | } | 66 | } |
| 58 | 67 | ||
| 59 | static int _wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h, int safe) | 68 | int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) |
| 60 | { | 69 | { |
| 61 | int err = 0; | 70 | int err; |
| 62 | struct msr_info rv; | 71 | struct msr_info rv; |
| 63 | 72 | ||
| 64 | rv.msr_no = msr_no; | 73 | rv.msr_no = msr_no; |
| 65 | rv.l = l; | 74 | err = smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 1); |
| 66 | rv.h = h; | 75 | *l = rv.l; |
| 67 | if (safe) { | 76 | *h = rv.h; |
| 68 | err = smp_call_function_single(cpu, __wrmsr_safe_on_cpu, | ||
| 69 | &rv, 1); | ||
| 70 | err = err ? err : rv.err; | ||
| 71 | } else { | ||
| 72 | err = smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1); | ||
| 73 | } | ||
| 74 | |||
| 75 | return err; | ||
| 76 | } | ||
| 77 | 77 | ||
| 78 | int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) | 78 | return err ? err : rv.err; |
| 79 | { | ||
| 80 | return _wrmsr_on_cpu(cpu, msr_no, l, h, 0); | ||
| 81 | } | 79 | } |
| 82 | 80 | ||
| 83 | int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) | ||
| 84 | { | ||
| 85 | return _rdmsr_on_cpu(cpu, msr_no, l, h, 0); | ||
| 86 | } | ||
| 87 | |||
| 88 | /* These "safe" variants are slower and should be used when the target MSR | ||
| 89 | may not actually exist. */ | ||
| 90 | int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) | 81 | int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) |
| 91 | { | 82 | { |
| 92 | return _wrmsr_on_cpu(cpu, msr_no, l, h, 1); | 83 | int err; |
| 93 | } | 84 | struct msr_info rv; |
| 94 | 85 | ||
| 95 | int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) | 86 | rv.msr_no = msr_no; |
| 96 | { | 87 | rv.l = l; |
| 97 | return _rdmsr_on_cpu(cpu, msr_no, l, h, 1); | 88 | rv.h = h; |
| 89 | err = smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 1); | ||
| 90 | |||
| 91 | return err ? err : rv.err; | ||
| 98 | } | 92 | } |
| 99 | 93 | ||
| 100 | EXPORT_SYMBOL(rdmsr_on_cpu); | 94 | EXPORT_SYMBOL(rdmsr_on_cpu); |
diff --git a/arch/x86/lib/string_32.c b/arch/x86/lib/string_32.c index 94972e7c094d..82004d2bf05e 100644 --- a/arch/x86/lib/string_32.c +++ b/arch/x86/lib/string_32.c | |||
| @@ -22,7 +22,7 @@ char *strcpy(char *dest, const char *src) | |||
| 22 | "testb %%al,%%al\n\t" | 22 | "testb %%al,%%al\n\t" |
| 23 | "jne 1b" | 23 | "jne 1b" |
| 24 | : "=&S" (d0), "=&D" (d1), "=&a" (d2) | 24 | : "=&S" (d0), "=&D" (d1), "=&a" (d2) |
| 25 | :"0" (src), "1" (dest) : "memory"); | 25 | : "0" (src), "1" (dest) : "memory"); |
| 26 | return dest; | 26 | return dest; |
| 27 | } | 27 | } |
| 28 | EXPORT_SYMBOL(strcpy); | 28 | EXPORT_SYMBOL(strcpy); |
| @@ -42,7 +42,7 @@ char *strncpy(char *dest, const char *src, size_t count) | |||
| 42 | "stosb\n" | 42 | "stosb\n" |
| 43 | "2:" | 43 | "2:" |
| 44 | : "=&S" (d0), "=&D" (d1), "=&c" (d2), "=&a" (d3) | 44 | : "=&S" (d0), "=&D" (d1), "=&c" (d2), "=&a" (d3) |
| 45 | :"0" (src), "1" (dest), "2" (count) : "memory"); | 45 | : "0" (src), "1" (dest), "2" (count) : "memory"); |
| 46 | return dest; | 46 | return dest; |
| 47 | } | 47 | } |
| 48 | EXPORT_SYMBOL(strncpy); | 48 | EXPORT_SYMBOL(strncpy); |
| @@ -60,7 +60,7 @@ char *strcat(char *dest, const char *src) | |||
| 60 | "testb %%al,%%al\n\t" | 60 | "testb %%al,%%al\n\t" |
| 61 | "jne 1b" | 61 | "jne 1b" |
| 62 | : "=&S" (d0), "=&D" (d1), "=&a" (d2), "=&c" (d3) | 62 | : "=&S" (d0), "=&D" (d1), "=&a" (d2), "=&c" (d3) |
| 63 | : "0" (src), "1" (dest), "2" (0), "3" (0xffffffffu): "memory"); | 63 | : "0" (src), "1" (dest), "2" (0), "3" (0xffffffffu) : "memory"); |
| 64 | return dest; | 64 | return dest; |
| 65 | } | 65 | } |
| 66 | EXPORT_SYMBOL(strcat); | 66 | EXPORT_SYMBOL(strcat); |
| @@ -105,9 +105,9 @@ int strcmp(const char *cs, const char *ct) | |||
| 105 | "2:\tsbbl %%eax,%%eax\n\t" | 105 | "2:\tsbbl %%eax,%%eax\n\t" |
| 106 | "orb $1,%%al\n" | 106 | "orb $1,%%al\n" |
| 107 | "3:" | 107 | "3:" |
| 108 | :"=a" (res), "=&S" (d0), "=&D" (d1) | 108 | : "=a" (res), "=&S" (d0), "=&D" (d1) |
| 109 | :"1" (cs), "2" (ct) | 109 | : "1" (cs), "2" (ct) |
| 110 | :"memory"); | 110 | : "memory"); |
| 111 | return res; | 111 | return res; |
| 112 | } | 112 | } |
| 113 | EXPORT_SYMBOL(strcmp); | 113 | EXPORT_SYMBOL(strcmp); |
| @@ -130,9 +130,9 @@ int strncmp(const char *cs, const char *ct, size_t count) | |||
| 130 | "3:\tsbbl %%eax,%%eax\n\t" | 130 | "3:\tsbbl %%eax,%%eax\n\t" |
| 131 | "orb $1,%%al\n" | 131 | "orb $1,%%al\n" |
| 132 | "4:" | 132 | "4:" |
| 133 | :"=a" (res), "=&S" (d0), "=&D" (d1), "=&c" (d2) | 133 | : "=a" (res), "=&S" (d0), "=&D" (d1), "=&c" (d2) |
| 134 | :"1" (cs), "2" (ct), "3" (count) | 134 | : "1" (cs), "2" (ct), "3" (count) |
| 135 | :"memory"); | 135 | : "memory"); |
| 136 | return res; | 136 | return res; |
| 137 | } | 137 | } |
| 138 | EXPORT_SYMBOL(strncmp); | 138 | EXPORT_SYMBOL(strncmp); |
| @@ -152,9 +152,9 @@ char *strchr(const char *s, int c) | |||
| 152 | "movl $1,%1\n" | 152 | "movl $1,%1\n" |
| 153 | "2:\tmovl %1,%0\n\t" | 153 | "2:\tmovl %1,%0\n\t" |
| 154 | "decl %0" | 154 | "decl %0" |
| 155 | :"=a" (res), "=&S" (d0) | 155 | : "=a" (res), "=&S" (d0) |
| 156 | :"1" (s), "0" (c) | 156 | : "1" (s), "0" (c) |
| 157 | :"memory"); | 157 | : "memory"); |
| 158 | return res; | 158 | return res; |
| 159 | } | 159 | } |
| 160 | EXPORT_SYMBOL(strchr); | 160 | EXPORT_SYMBOL(strchr); |
| @@ -169,9 +169,9 @@ size_t strlen(const char *s) | |||
| 169 | "scasb\n\t" | 169 | "scasb\n\t" |
| 170 | "notl %0\n\t" | 170 | "notl %0\n\t" |
| 171 | "decl %0" | 171 | "decl %0" |
| 172 | :"=c" (res), "=&D" (d0) | 172 | : "=c" (res), "=&D" (d0) |
| 173 | :"1" (s), "a" (0), "0" (0xffffffffu) | 173 | : "1" (s), "a" (0), "0" (0xffffffffu) |
| 174 | :"memory"); | 174 | : "memory"); |
| 175 | return res; | 175 | return res; |
| 176 | } | 176 | } |
| 177 | EXPORT_SYMBOL(strlen); | 177 | EXPORT_SYMBOL(strlen); |
| @@ -189,9 +189,9 @@ void *memchr(const void *cs, int c, size_t count) | |||
| 189 | "je 1f\n\t" | 189 | "je 1f\n\t" |
| 190 | "movl $1,%0\n" | 190 | "movl $1,%0\n" |
| 191 | "1:\tdecl %0" | 191 | "1:\tdecl %0" |
| 192 | :"=D" (res), "=&c" (d0) | 192 | : "=D" (res), "=&c" (d0) |
| 193 | :"a" (c), "0" (cs), "1" (count) | 193 | : "a" (c), "0" (cs), "1" (count) |
| 194 | :"memory"); | 194 | : "memory"); |
| 195 | return res; | 195 | return res; |
| 196 | } | 196 | } |
| 197 | EXPORT_SYMBOL(memchr); | 197 | EXPORT_SYMBOL(memchr); |
| @@ -228,9 +228,9 @@ size_t strnlen(const char *s, size_t count) | |||
| 228 | "cmpl $-1,%1\n\t" | 228 | "cmpl $-1,%1\n\t" |
| 229 | "jne 1b\n" | 229 | "jne 1b\n" |
| 230 | "3:\tsubl %2,%0" | 230 | "3:\tsubl %2,%0" |
| 231 | :"=a" (res), "=&d" (d0) | 231 | : "=a" (res), "=&d" (d0) |
| 232 | :"c" (s), "1" (count) | 232 | : "c" (s), "1" (count) |
| 233 | :"memory"); | 233 | : "memory"); |
| 234 | return res; | 234 | return res; |
| 235 | } | 235 | } |
| 236 | EXPORT_SYMBOL(strnlen); | 236 | EXPORT_SYMBOL(strnlen); |
diff --git a/arch/x86/lib/strstr_32.c b/arch/x86/lib/strstr_32.c index 42e8a50303f3..8e2d55f754bf 100644 --- a/arch/x86/lib/strstr_32.c +++ b/arch/x86/lib/strstr_32.c | |||
| @@ -23,9 +23,9 @@ __asm__ __volatile__( | |||
| 23 | "jne 1b\n\t" | 23 | "jne 1b\n\t" |
| 24 | "xorl %%eax,%%eax\n\t" | 24 | "xorl %%eax,%%eax\n\t" |
| 25 | "2:" | 25 | "2:" |
| 26 | :"=a" (__res), "=&c" (d0), "=&S" (d1) | 26 | : "=a" (__res), "=&c" (d0), "=&S" (d1) |
| 27 | :"0" (0), "1" (0xffffffff), "2" (cs), "g" (ct) | 27 | : "0" (0), "1" (0xffffffff), "2" (cs), "g" (ct) |
| 28 | :"dx", "di"); | 28 | : "dx", "di"); |
| 29 | return __res; | 29 | return __res; |
| 30 | } | 30 | } |
| 31 | 31 | ||
