diff options
Diffstat (limited to 'include/asm-x86/msr.h')
| -rw-r--r-- | include/asm-x86/msr.h | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/include/asm-x86/msr.h b/include/asm-x86/msr.h deleted file mode 100644 index 2362cfda1fb..00000000000 --- a/include/asm-x86/msr.h +++ /dev/null @@ -1,224 +0,0 @@ -#ifndef __ASM_X86_MSR_H_ -#define __ASM_X86_MSR_H_ - -#include <asm/msr-index.h> - -#ifndef __ASSEMBLY__ -# include <linux/types.h> -#endif - -#ifdef __KERNEL__ -#ifndef __ASSEMBLY__ - -#include <asm/asm.h> -#include <asm/errno.h> - -static inline unsigned long long native_read_tscp(unsigned int *aux) -{ - unsigned long low, high; - asm volatile(".byte 0x0f,0x01,0xf9" - : "=a" (low), "=d" (high), "=c" (*aux)); - return low | ((u64)high << 32); -} - -/* - * i386 calling convention returns 64-bit value in edx:eax, while - * x86_64 returns at rax. Also, the "A" constraint does not really - * mean rdx:rax in x86_64, so we need specialized behaviour for each - * architecture - */ -#ifdef CONFIG_X86_64 -#define DECLARE_ARGS(val, low, high) unsigned low, high -#define EAX_EDX_VAL(val, low, high) ((low) | ((u64)(high) << 32)) -#define EAX_EDX_ARGS(val, low, high) "a" (low), "d" (high) -#define EAX_EDX_RET(val, low, high) "=a" (low), "=d" (high) -#else -#define DECLARE_ARGS(val, low, high) unsigned long long val -#define EAX_EDX_VAL(val, low, high) (val) -#define EAX_EDX_ARGS(val, low, high) "A" (val) -#define EAX_EDX_RET(val, low, high) "=A" (val) -#endif - -static inline unsigned long long native_read_msr(unsigned int msr) -{ - DECLARE_ARGS(val, low, high); - - asm volatile("rdmsr" : EAX_EDX_RET(val, low, high) : "c" (msr)); - return EAX_EDX_VAL(val, low, high); -} - -static inline unsigned long long native_read_msr_safe(unsigned int msr, - int *err) -{ - 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 void native_write_msr(unsigned int msr, - unsigned low, unsigned high) -{ - asm volatile("wrmsr" : : "c" (msr), "a"(low), "d" (high) : "memory"); -} - -static inline int native_write_msr_safe(unsigned int msr, - unsigned low, unsigned high) -{ - int err; - asm volatile("2: wrmsr ; 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] "=a" (err) - : "c" (msr), "0" (low), "d" (high), - [fault] "i" (-EFAULT) - : "memory"); - return err; -} - -extern unsigned long long native_read_tsc(void); - -static __always_inline unsigned long long __native_read_tsc(void) -{ - DECLARE_ARGS(val, low, high); - - rdtsc_barrier(); - asm volatile("rdtsc" : EAX_EDX_RET(val, low, high)); - rdtsc_barrier(); - - return EAX_EDX_VAL(val, low, high); -} - -static inline unsigned long long native_read_pmc(int counter) -{ - DECLARE_ARGS(val, low, high); - - asm volatile("rdpmc" : EAX_EDX_RET(val, low, high) : "c" (counter)); - return EAX_EDX_VAL(val, low, high); -} - -#ifdef CONFIG_PARAVIRT -#include <asm/paravirt.h> -#else -#include <linux/errno.h> -/* - * Access to machine-specific registers (available on 586 and better only) - * Note: the rd* operations modify the parameters directly (without using - * pointer indirection), this allows gcc to optimize better - */ - -#define rdmsr(msr, val1, val2) \ -do { \ - u64 __val = native_read_msr((msr)); \ - (val1) = (u32)__val; \ - (val2) = (u32)(__val >> 32); \ -} while (0) - -static inline void wrmsr(unsigned msr, unsigned low, unsigned high) -{ - native_write_msr(msr, low, high); -} - -#define rdmsrl(msr, val) \ - ((val) = native_read_msr((msr))) - -#define wrmsrl(msr, val) \ - native_write_msr((msr), (u32)((u64)(val)), (u32)((u64)(val) >> 32)) - -/* wrmsr with exception handling */ -static inline int wrmsr_safe(unsigned msr, unsigned low, unsigned high) -{ - return native_write_msr_safe(msr, low, high); -} - -/* rdmsr with exception handling */ -#define rdmsr_safe(msr, p1, p2) \ -({ \ - int __err; \ - u64 __val = native_read_msr_safe((msr), &__err); \ - (*p1) = (u32)__val; \ - (*p2) = (u32)(__val >> 32); \ - __err; \ -}) - -static inline int rdmsrl_safe(unsigned msr, unsigned long long *p) -{ - int err; - - *p = native_read_msr_safe(msr, &err); - return err; -} - -#define rdtscl(low) \ - ((low) = (u32)native_read_tsc()) - -#define rdtscll(val) \ - ((val) = native_read_tsc()) - -#define rdpmc(counter, low, high) \ -do { \ - u64 _l = native_read_pmc((counter)); \ - (low) = (u32)_l; \ - (high) = (u32)(_l >> 32); \ -} while (0) - -#define rdtscp(low, high, aux) \ -do { \ - unsigned long long _val = native_read_tscp(&(aux)); \ - (low) = (u32)_val; \ - (high) = (u32)(_val >> 32); \ -} while (0) - -#define rdtscpll(val, aux) (val) = native_read_tscp(&(aux)) - -#endif /* !CONFIG_PARAVIRT */ - - -#define checking_wrmsrl(msr, val) wrmsr_safe((msr), (u32)(val), \ - (u32)((val) >> 32)) - -#define write_tsc(val1, val2) wrmsr(0x10, (val1), (val2)) - -#define write_rdtscp_aux(val) wrmsr(0xc0000103, (val), 0) - -#ifdef CONFIG_SMP -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 int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) -{ - rdmsr(msr_no, *l, *h); - return 0; -} -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) -{ - return rdmsr_safe(msr_no, l, h); -} -static inline int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) -{ - return wrmsr_safe(msr_no, l, h); -} -#endif /* CONFIG_SMP */ -#endif /* __ASSEMBLY__ */ -#endif /* __KERNEL__ */ - - -#endif |