diff options
Diffstat (limited to 'src/include/cpu/x86/msr.h')
| -rw-r--r-- | src/include/cpu/x86/msr.h | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/include/cpu/x86/msr.h b/src/include/cpu/x86/msr.h index a201ef42f2..e8bc195307 100644 --- a/src/include/cpu/x86/msr.h +++ b/src/include/cpu/x86/msr.h @@ -29,7 +29,17 @@ typedef struct msrinit_struct msr_t msr; } msrinit_t; -static inline msr_t rdmsr(unsigned index) +/* The following functions require the always_inline due to AMD + * function STOP_CAR_AND_CPU that disables cache as + * ram, the cache as ram stack can no longer be used. Called + * functions must be inlined to avoid stack usage. Also, the + * compiler must keep local variables register based and not + * allocated them from the stack. With gcc 4.5.0, some functions + * declared as inline are not being inlined. This patch forces + * these functions to always be inlined by adding the qualifier + * __attribute__((always_inline)) to their declaration. + */ +static inline __attribute__((always_inline)) msr_t rdmsr(unsigned index) { msr_t result; __asm__ __volatile__ ( @@ -40,7 +50,7 @@ static inline msr_t rdmsr(unsigned index) return result; } -static inline void wrmsr(unsigned index, msr_t msr) +static inline __attribute__((always_inline)) void wrmsr(unsigned index, msr_t msr) { __asm__ __volatile__ ( "wrmsr" |