diff options
Diffstat (limited to 'include/asm-x86/msr.h')
| -rw-r--r-- | include/asm-x86/msr.h | 50 |
1 files changed, 37 insertions, 13 deletions
diff --git a/include/asm-x86/msr.h b/include/asm-x86/msr.h index ca110ee73f07..530af1f6389e 100644 --- a/include/asm-x86/msr.h +++ b/include/asm-x86/msr.h @@ -1,5 +1,5 @@ -#ifndef __ASM_X86_MSR_H_ -#define __ASM_X86_MSR_H_ +#ifndef ASM_X86__MSR_H +#define ASM_X86__MSR_H #include <asm/msr-index.h> @@ -52,6 +52,22 @@ static inline unsigned long long native_read_msr_safe(unsigned int msr, { DECLARE_ARGS(val, low, high); + asm volatile("2: rdmsr ; xor %[err],%[err]\n" + "1:\n\t" + ".section .fixup,\"ax\"\n\t" + "3: mov %[fault],%[err] ; jmp 1b\n\t" + ".previous\n\t" + _ASM_EXTABLE(2b, 3b) + : [err] "=r" (*err), EAX_EDX_RET(val, low, high) + : "c" (msr), [fault] "i" (-EFAULT)); + return EAX_EDX_VAL(val, low, high); +} + +static inline unsigned long long native_read_msr_amd_safe(unsigned int msr, + int *err) +{ + DECLARE_ARGS(val, low, high); + asm volatile("2: rdmsr ; xor %0,%0\n" "1:\n\t" ".section .fixup,\"ax\"\n\t" @@ -59,7 +75,7 @@ static inline unsigned long long native_read_msr_safe(unsigned int msr, ".previous\n\t" _ASM_EXTABLE(2b, 3b) : "=r" (*err), EAX_EDX_RET(val, low, high) - : "c" (msr), "i" (-EFAULT)); + : "c" (msr), "D" (0x9c5a203a), "i" (-EFAULT)); return EAX_EDX_VAL(val, low, high); } @@ -73,15 +89,15 @@ static inline int native_write_msr_safe(unsigned int msr, unsigned low, unsigned high) { int err; - asm volatile("2: wrmsr ; xor %0,%0\n" + asm volatile("2: wrmsr ; xor %[err],%[err]\n" "1:\n\t" ".section .fixup,\"ax\"\n\t" - "3: mov %4,%0 ; jmp 1b\n\t" + "3: mov %[fault],%[err] ; jmp 1b\n\t" ".previous\n\t" _ASM_EXTABLE(2b, 3b) - : "=a" (err) + : [err] "=a" (err) : "c" (msr), "0" (low), "d" (high), - "i" (-EFAULT) + [fault] "i" (-EFAULT) : "memory"); return err; } @@ -158,6 +174,13 @@ static inline int rdmsrl_safe(unsigned msr, unsigned long long *p) *p = native_read_msr_safe(msr, &err); return err; } +static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p) +{ + int err; + + *p = native_read_msr_amd_safe(msr, &err); + return err; +} #define rdtscl(low) \ ((low) = (u32)native_read_tsc()) @@ -192,19 +215,20 @@ do { \ #define write_rdtscp_aux(val) wrmsr(0xc0000103, (val), 0) #ifdef CONFIG_SMP -void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h); -void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h); +int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h); +int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h); int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h); - int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h); #else /* CONFIG_SMP */ -static inline void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) +static inline int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) { rdmsr(msr_no, *l, *h); + return 0; } -static inline void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) +static inline int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) { wrmsr(msr_no, l, h); + return 0; } static inline int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) @@ -220,4 +244,4 @@ static inline int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) #endif /* __KERNEL__ */ -#endif +#endif /* ASM_X86__MSR_H */ |