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
91 	DECLARE_ARGS(val, low, high);  in __rdmsr()
96 		     : EAX_EDX_RET(val, low, high) : "c" (msr));  in __rdmsr()
98 	return EAX_EDX_VAL(val, low, high);  in __rdmsr()
101 static inline void notrace __wrmsr(unsigned int msr, u32 low, u32 high)  in __wrmsr()  argument
106 		     : : "c" (msr), "a"(low), "d" (high) : "memory");  in __wrmsr()
116 #define native_wrmsr(msr, low, high)			\  argument
117 	__wrmsr(msr, low, high)
138 	DECLARE_ARGS(val, low, high);  in native_read_msr_safe()
149 		     : [err] "=r" (*err), EAX_EDX_RET(val, low, high)  in native_read_msr_safe()
152 		do_trace_read_msr(msr, EAX_EDX_VAL(val, low, high), *err);  in native_read_msr_safe()
153 	return EAX_EDX_VAL(val, low, high);  in native_read_msr_safe()
158 native_write_msr(unsigned int msr, u32 low, u32 high)  in native_write_msr()  argument
160 	__wrmsr(msr, low, high);  in native_write_msr()
163 		do_trace_write_msr(msr, ((u64)high << 32 | low), 0);  in native_write_msr()
168 native_write_msr_safe(unsigned int msr, u32 low, u32 high)  in native_write_msr_safe()  argument
179 		     : "c" (msr), "0" (low), "d" (high),  in native_write_msr_safe()
183 		do_trace_write_msr(msr, ((u64)high << 32 | low), err);  in native_write_msr_safe()
201 	DECLARE_ARGS(val, low, high);  in rdtsc()
203 	asm volatile("rdtsc" : EAX_EDX_RET(val, low, high));  in rdtsc()
205 	return EAX_EDX_VAL(val, low, high);  in rdtsc()
218 	DECLARE_ARGS(val, low, high);  in rdtsc_ordered()
237 			: EAX_EDX_RET(val, low, high)  in rdtsc_ordered()
241 	return EAX_EDX_VAL(val, low, high);  in rdtsc_ordered()
246 	DECLARE_ARGS(val, low, high);  in native_read_pmc()
248 	asm volatile("rdpmc" : EAX_EDX_RET(val, low, high) : "c" (counter));  in native_read_pmc()
250 		do_trace_rdpmc(counter, EAX_EDX_VAL(val, low, high), 0);  in native_read_pmc()
251 	return EAX_EDX_VAL(val, low, high);  in native_read_pmc()
264 #define rdmsr(msr, low, high)					\  argument
267 	(void)((low) = (u32)__val);				\
271 static inline void wrmsr(unsigned int msr, u32 low, u32 high)  in wrmsr()  argument
273 	native_write_msr(msr, low, high);  in wrmsr()
285 static inline int wrmsr_safe(unsigned int msr, u32 low, u32 high)  in wrmsr_safe()  argument
287 	return native_write_msr_safe(msr, low, high);  in wrmsr_safe()
291 #define rdmsr_safe(msr, low, high)				\  argument
295 	(*low) = (u32)__val;					\
308 #define rdpmc(counter, low, high)			\  argument
311 	(low)  = (u32)_l;				\
327 #define write_tsc(low, high) wrmsr(MSR_IA32_TSC, (low), (high))  argument