53 /* Using 64-bit values saves one instruction clearing the high half of low */
54 #define DECLARE_ARGS(val, low, high)	unsigned long low, high  argument
55 #define EAX_EDX_VAL(val, low, high)	((low) | (high) << 32)  argument
56 #define EAX_EDX_RET(val, low, high)	"=a" (low), "=d" (high)  argument
58 #define DECLARE_ARGS(val, low, high)	unsigned long long val  argument
59 #define EAX_EDX_VAL(val, low, high)	(val)  argument
60 #define EAX_EDX_RET(val, low, high)	"=A" (val)  argument
93 	DECLARE_ARGS(val, low, high);  in __rdmsr()
98 		     : EAX_EDX_RET(val, low, high) : "c" (msr));  in __rdmsr()
100 	return EAX_EDX_VAL(val, low, high);  in __rdmsr()
103 static inline void notrace __wrmsr(unsigned int msr, u32 low, u32 high)  in __wrmsr()  argument
108 		     : : "c" (msr), "a"(low), "d" (high) : "memory");  in __wrmsr()
118 #define native_wrmsr(msr, low, high)			\  argument
119 	__wrmsr(msr, low, high)
140 	DECLARE_ARGS(val, low, high);  in native_read_msr_safe()
151 		     : [err] "=r" (*err), EAX_EDX_RET(val, low, high)  in native_read_msr_safe()
154 		do_trace_read_msr(msr, EAX_EDX_VAL(val, low, high), *err);  in native_read_msr_safe()
155 	return EAX_EDX_VAL(val, low, high);  in native_read_msr_safe()
160 native_write_msr(unsigned int msr, u32 low, u32 high)  in native_write_msr()  argument
162 	__wrmsr(msr, low, high);  in native_write_msr()
165 		do_trace_write_msr(msr, ((u64)high << 32 | low), 0);  in native_write_msr()
170 native_write_msr_safe(unsigned int msr, u32 low, u32 high)  in native_write_msr_safe()  argument
181 		     : "c" (msr), "0" (low), "d" (high),  in native_write_msr_safe()
185 		do_trace_write_msr(msr, ((u64)high << 32 | low), err);  in native_write_msr_safe()
203 	DECLARE_ARGS(val, low, high);  in rdtsc()
205 	asm volatile("rdtsc" : EAX_EDX_RET(val, low, high));  in rdtsc()
207 	return EAX_EDX_VAL(val, low, high);  in rdtsc()
237 	DECLARE_ARGS(val, low, high);  in native_read_pmc()
239 	asm volatile("rdpmc" : EAX_EDX_RET(val, low, high) : "c" (counter));  in native_read_pmc()
241 		do_trace_rdpmc(counter, EAX_EDX_VAL(val, low, high), 0);  in native_read_pmc()
242 	return EAX_EDX_VAL(val, low, high);  in native_read_pmc()
255 #define rdmsr(msr, low, high)					\  argument
259 	(void)((high) = (u32)(__val >> 32));			\
262 static inline void wrmsr(unsigned int msr, u32 low, u32 high)  in wrmsr()  argument
264 	native_write_msr(msr, low, high);  in wrmsr()
276 static inline int wrmsr_safe(unsigned int msr, u32 low, u32 high)  in wrmsr_safe()  argument
278 	return native_write_msr_safe(msr, low, high);  in wrmsr_safe()
282 #define rdmsr_safe(msr, low, high)				\  argument
287 	(*high) = (u32)(__val >> 32);				\
299 #define rdpmc(counter, low, high)			\  argument
303 	(high) = (u32)(_l >> 32);			\
318 #define write_tsc(low, high) wrmsr(MSR_IA32_TSC, (low), (high))  argument