diff options
Diffstat (limited to 'include/asm-i386')
| -rw-r--r-- | include/asm-i386/alternative.h | 6 | ||||
| -rw-r--r-- | include/asm-i386/tsc.h | 6 |
2 files changed, 10 insertions, 2 deletions
diff --git a/include/asm-i386/alternative.h b/include/asm-i386/alternative.h index 0f70b379b02..eb7da5402bf 100644 --- a/include/asm-i386/alternative.h +++ b/include/asm-i386/alternative.h @@ -98,6 +98,12 @@ static inline void alternatives_smp_switch(int smp) {} ".previous" : output : [feat] "i" (feature), ##input) /* + * use this macro(s) if you need more than one output parameter + * in alternative_io + */ +#define ASM_OUTPUT2(a, b) a, b + +/* * Alternative inline assembly for SMP. * * The LOCK_PREFIX macro defined here replaces the LOCK and diff --git a/include/asm-i386/tsc.h b/include/asm-i386/tsc.h index 3f3c1fa000b..62c091ffccc 100644 --- a/include/asm-i386/tsc.h +++ b/include/asm-i386/tsc.h @@ -35,14 +35,16 @@ static inline cycles_t get_cycles(void) static __always_inline cycles_t get_cycles_sync(void) { unsigned long long ret; - unsigned eax; + unsigned eax, edx; /* * Use RDTSCP if possible; it is guaranteed to be synchronous * and doesn't cause a VMEXIT on Hypervisors */ alternative_io(ASM_NOP3, ".byte 0x0f,0x01,0xf9", X86_FEATURE_RDTSCP, - "=A" (ret), "0" (0ULL) : "ecx", "memory"); + ASM_OUTPUT2("=a" (eax), "=d" (edx)), + "a" (0U), "d" (0U) : "ecx", "memory"); + ret = (((unsigned long long)edx) << 32) | ((unsigned long long)eax); if (ret) return ret; |