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be7baf80 TG |
1 | #ifndef __ASM_X86_MSR_H_ |
2 | #define __ASM_X86_MSR_H_ | |
3 | ||
4 | #include <asm/msr-index.h> | |
5 | ||
d43a3312 MF |
6 | #ifndef __ASSEMBLY__ |
7 | # include <linux/types.h> | |
8 | #endif | |
9 | ||
be7baf80 TG |
10 | #ifdef __i386__ |
11 | ||
96a388de | 12 | #ifdef __KERNEL__ |
be7baf80 TG |
13 | #ifndef __ASSEMBLY__ |
14 | ||
15 | #include <asm/errno.h> | |
16 | ||
17 | static inline unsigned long long native_read_msr(unsigned int msr) | |
18 | { | |
19 | unsigned long long val; | |
20 | ||
21 | asm volatile("rdmsr" : "=A" (val) : "c" (msr)); | |
22 | return val; | |
23 | } | |
24 | ||
25 | static inline unsigned long long native_read_msr_safe(unsigned int msr, | |
26 | int *err) | |
27 | { | |
28 | unsigned long long val; | |
29 | ||
30 | asm volatile("2: rdmsr ; xorl %0,%0\n" | |
31 | "1:\n\t" | |
32 | ".section .fixup,\"ax\"\n\t" | |
33 | "3: movl %3,%0 ; jmp 1b\n\t" | |
34 | ".previous\n\t" | |
35 | ".section __ex_table,\"a\"\n" | |
36 | " .align 4\n\t" | |
37 | " .long 2b,3b\n\t" | |
38 | ".previous" | |
39 | : "=r" (*err), "=A" (val) | |
40 | : "c" (msr), "i" (-EFAULT)); | |
41 | ||
42 | return val; | |
43 | } | |
44 | ||
45 | static inline void native_write_msr(unsigned int msr, unsigned long long val) | |
46 | { | |
47 | asm volatile("wrmsr" : : "c" (msr), "A"(val)); | |
48 | } | |
49 | ||
50 | static inline int native_write_msr_safe(unsigned int msr, | |
51 | unsigned long long val) | |
52 | { | |
53 | int err; | |
54 | asm volatile("2: wrmsr ; xorl %0,%0\n" | |
55 | "1:\n\t" | |
56 | ".section .fixup,\"ax\"\n\t" | |
57 | "3: movl %4,%0 ; jmp 1b\n\t" | |
58 | ".previous\n\t" | |
59 | ".section __ex_table,\"a\"\n" | |
60 | " .align 4\n\t" | |
61 | " .long 2b,3b\n\t" | |
62 | ".previous" | |
63 | : "=a" (err) | |
64 | : "c" (msr), "0" ((u32)val), "d" ((u32)(val>>32)), | |
65 | "i" (-EFAULT)); | |
66 | return err; | |
67 | } | |
68 | ||
69 | static inline unsigned long long native_read_tsc(void) | |
70 | { | |
71 | unsigned long long val; | |
72 | asm volatile("rdtsc" : "=A" (val)); | |
73 | return val; | |
74 | } | |
75 | ||
76 | static inline unsigned long long native_read_pmc(void) | |
77 | { | |
78 | unsigned long long val; | |
79 | asm volatile("rdpmc" : "=A" (val)); | |
80 | return val; | |
81 | } | |
82 | ||
83 | #ifdef CONFIG_PARAVIRT | |
84 | #include <asm/paravirt.h> | |
96a388de | 85 | #else |
be7baf80 TG |
86 | #include <linux/errno.h> |
87 | /* | |
88 | * Access to machine-specific registers (available on 586 and better only) | |
89 | * Note: the rd* operations modify the parameters directly (without using | |
90 | * pointer indirection), this allows gcc to optimize better | |
91 | */ | |
92 | ||
93 | #define rdmsr(msr,val1,val2) \ | |
94 | do { \ | |
95 | u64 __val = native_read_msr(msr); \ | |
96 | (val1) = (u32)__val; \ | |
97 | (val2) = (u32)(__val >> 32); \ | |
98 | } while(0) | |
99 | ||
100 | static inline void wrmsr(u32 __msr, u32 __low, u32 __high) | |
101 | { | |
102 | native_write_msr(__msr, ((u64)__high << 32) | __low); | |
103 | } | |
104 | ||
105 | #define rdmsrl(msr,val) \ | |
106 | ((val) = native_read_msr(msr)) | |
107 | ||
108 | #define wrmsrl(msr,val) native_write_msr(msr, val) | |
109 | ||
110 | /* wrmsr with exception handling */ | |
111 | static inline int wrmsr_safe(u32 __msr, u32 __low, u32 __high) | |
112 | { | |
113 | return native_write_msr_safe(__msr, ((u64)__high << 32) | __low); | |
114 | } | |
115 | ||
116 | /* rdmsr with exception handling */ | |
117 | #define rdmsr_safe(msr,p1,p2) \ | |
118 | ({ \ | |
119 | int __err; \ | |
120 | u64 __val = native_read_msr_safe(msr, &__err); \ | |
121 | (*p1) = (u32)__val; \ | |
122 | (*p2) = (u32)(__val >> 32); \ | |
123 | __err; \ | |
124 | }) | |
125 | ||
126 | #define rdtscl(low) \ | |
127 | ((low) = (u32)native_read_tsc()) | |
128 | ||
129 | #define rdtscll(val) \ | |
130 | ((val) = native_read_tsc()) | |
131 | ||
132 | #define write_tsc(val1,val2) wrmsr(0x10, val1, val2) | |
133 | ||
134 | #define rdpmc(counter,low,high) \ | |
135 | do { \ | |
136 | u64 _l = native_read_pmc(); \ | |
137 | (low) = (u32)_l; \ | |
138 | (high) = (u32)(_l >> 32); \ | |
139 | } while(0) | |
140 | #endif /* !CONFIG_PARAVIRT */ | |
141 | ||
142 | #ifdef CONFIG_SMP | |
143 | void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h); | |
144 | void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h); | |
145 | int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h); | |
146 | int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h); | |
147 | #else /* CONFIG_SMP */ | |
148 | static inline void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) | |
149 | { | |
150 | rdmsr(msr_no, *l, *h); | |
151 | } | |
152 | static inline void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) | |
153 | { | |
154 | wrmsr(msr_no, l, h); | |
155 | } | |
156 | static inline int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) | |
157 | { | |
158 | return rdmsr_safe(msr_no, l, h); | |
159 | } | |
160 | static inline int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) | |
161 | { | |
162 | return wrmsr_safe(msr_no, l, h); | |
163 | } | |
164 | #endif /* CONFIG_SMP */ | |
165 | #endif /* ! __ASSEMBLY__ */ | |
166 | #endif /* __KERNEL__ */ | |
167 | ||
168 | #else /* __i386__ */ | |
169 | ||
170 | #ifndef __ASSEMBLY__ | |
171 | #include <linux/errno.h> | |
172 | /* | |
173 | * Access to machine-specific registers (available on 586 and better only) | |
174 | * Note: the rd* operations modify the parameters directly (without using | |
175 | * pointer indirection), this allows gcc to optimize better | |
176 | */ | |
177 | ||
178 | #define rdmsr(msr,val1,val2) \ | |
179 | __asm__ __volatile__("rdmsr" \ | |
180 | : "=a" (val1), "=d" (val2) \ | |
181 | : "c" (msr)) | |
182 | ||
183 | ||
184 | #define rdmsrl(msr,val) do { unsigned long a__,b__; \ | |
185 | __asm__ __volatile__("rdmsr" \ | |
186 | : "=a" (a__), "=d" (b__) \ | |
187 | : "c" (msr)); \ | |
188 | val = a__ | (b__<<32); \ | |
189 | } while(0) | |
190 | ||
191 | #define wrmsr(msr,val1,val2) \ | |
192 | __asm__ __volatile__("wrmsr" \ | |
193 | : /* no outputs */ \ | |
194 | : "c" (msr), "a" (val1), "d" (val2)) | |
195 | ||
196 | #define wrmsrl(msr,val) wrmsr(msr,(__u32)((__u64)(val)),((__u64)(val))>>32) | |
197 | ||
be7baf80 TG |
198 | #define rdtsc(low,high) \ |
199 | __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high)) | |
200 | ||
201 | #define rdtscl(low) \ | |
202 | __asm__ __volatile__ ("rdtsc" : "=a" (low) : : "edx") | |
203 | ||
204 | #define rdtscp(low,high,aux) \ | |
56986d42 | 205 | __asm__ __volatile__ (".byte 0x0f,0x01,0xf9" : "=a" (low), "=d" (high), "=c" (aux)) |
be7baf80 TG |
206 | |
207 | #define rdtscll(val) do { \ | |
208 | unsigned int __a,__d; \ | |
56986d42 | 209 | __asm__ __volatile__("rdtsc" : "=a" (__a), "=d" (__d)); \ |
be7baf80 TG |
210 | (val) = ((unsigned long)__a) | (((unsigned long)__d)<<32); \ |
211 | } while(0) | |
212 | ||
213 | #define rdtscpll(val, aux) do { \ | |
214 | unsigned long __a, __d; \ | |
56986d42 | 215 | __asm__ __volatile__ (".byte 0x0f,0x01,0xf9" : "=a" (__a), "=d" (__d), "=c" (aux)); \ |
be7baf80 TG |
216 | (val) = (__d << 32) | __a; \ |
217 | } while (0) | |
218 | ||
219 | #define write_tsc(val1,val2) wrmsr(0x10, val1, val2) | |
220 | ||
221 | #define write_rdtscp_aux(val) wrmsr(0xc0000103, val, 0) | |
222 | ||
223 | #define rdpmc(counter,low,high) \ | |
224 | __asm__ __volatile__("rdpmc" \ | |
225 | : "=a" (low), "=d" (high) \ | |
226 | : "c" (counter)) | |
227 | ||
56986d42 | 228 | |
be7baf80 TG |
229 | static inline void cpuid(int op, unsigned int *eax, unsigned int *ebx, |
230 | unsigned int *ecx, unsigned int *edx) | |
231 | { | |
232 | __asm__("cpuid" | |
233 | : "=a" (*eax), | |
234 | "=b" (*ebx), | |
235 | "=c" (*ecx), | |
236 | "=d" (*edx) | |
237 | : "0" (op)); | |
238 | } | |
239 | ||
240 | /* Some CPUID calls want 'count' to be placed in ecx */ | |
241 | static inline void cpuid_count(int op, int count, int *eax, int *ebx, int *ecx, | |
242 | int *edx) | |
243 | { | |
244 | __asm__("cpuid" | |
245 | : "=a" (*eax), | |
246 | "=b" (*ebx), | |
247 | "=c" (*ecx), | |
248 | "=d" (*edx) | |
249 | : "0" (op), "c" (count)); | |
250 | } | |
251 | ||
252 | /* | |
253 | * CPUID functions returning a single datum | |
254 | */ | |
255 | static inline unsigned int cpuid_eax(unsigned int op) | |
256 | { | |
257 | unsigned int eax; | |
258 | ||
259 | __asm__("cpuid" | |
260 | : "=a" (eax) | |
261 | : "0" (op) | |
262 | : "bx", "cx", "dx"); | |
263 | return eax; | |
264 | } | |
265 | static inline unsigned int cpuid_ebx(unsigned int op) | |
266 | { | |
267 | unsigned int eax, ebx; | |
268 | ||
269 | __asm__("cpuid" | |
270 | : "=a" (eax), "=b" (ebx) | |
271 | : "0" (op) | |
272 | : "cx", "dx" ); | |
273 | return ebx; | |
274 | } | |
275 | static inline unsigned int cpuid_ecx(unsigned int op) | |
276 | { | |
277 | unsigned int eax, ecx; | |
278 | ||
279 | __asm__("cpuid" | |
280 | : "=a" (eax), "=c" (ecx) | |
281 | : "0" (op) | |
282 | : "bx", "dx" ); | |
283 | return ecx; | |
284 | } | |
285 | static inline unsigned int cpuid_edx(unsigned int op) | |
286 | { | |
287 | unsigned int eax, edx; | |
288 | ||
289 | __asm__("cpuid" | |
290 | : "=a" (eax), "=d" (edx) | |
291 | : "0" (op) | |
292 | : "bx", "cx"); | |
293 | return edx; | |
294 | } | |
295 | ||
56986d42 MF |
296 | #ifdef __KERNEL__ |
297 | ||
298 | /* wrmsr with exception handling */ | |
299 | #define wrmsr_safe(msr,a,b) ({ int ret__; \ | |
300 | asm volatile("2: wrmsr ; xorl %0,%0\n" \ | |
301 | "1:\n\t" \ | |
302 | ".section .fixup,\"ax\"\n\t" \ | |
303 | "3: movl %4,%0 ; jmp 1b\n\t" \ | |
304 | ".previous\n\t" \ | |
305 | ".section __ex_table,\"a\"\n" \ | |
306 | " .align 8\n\t" \ | |
307 | " .quad 2b,3b\n\t" \ | |
308 | ".previous" \ | |
309 | : "=a" (ret__) \ | |
310 | : "c" (msr), "0" (a), "d" (b), "i" (-EFAULT)); \ | |
311 | ret__; }) | |
312 | ||
313 | #define checking_wrmsrl(msr,val) wrmsr_safe(msr,(u32)(val),(u32)((val)>>32)) | |
314 | ||
315 | #define rdmsr_safe(msr,a,b) \ | |
316 | ({ int ret__; \ | |
317 | asm volatile ("1: rdmsr\n" \ | |
318 | "2:\n" \ | |
319 | ".section .fixup,\"ax\"\n" \ | |
320 | "3: movl %4,%0\n" \ | |
321 | " jmp 2b\n" \ | |
322 | ".previous\n" \ | |
323 | ".section __ex_table,\"a\"\n" \ | |
324 | " .align 8\n" \ | |
325 | " .quad 1b,3b\n" \ | |
326 | ".previous":"=&bDS" (ret__), "=a"(*(a)), "=d"(*(b)) \ | |
327 | :"c"(msr), "i"(-EIO), "0"(0)); \ | |
328 | ret__; }) | |
329 | ||
be7baf80 TG |
330 | #ifdef CONFIG_SMP |
331 | void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h); | |
332 | void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h); | |
333 | int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h); | |
334 | int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h); | |
335 | #else /* CONFIG_SMP */ | |
336 | static inline void rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) | |
337 | { | |
338 | rdmsr(msr_no, *l, *h); | |
339 | } | |
340 | static inline void wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) | |
341 | { | |
342 | wrmsr(msr_no, l, h); | |
343 | } | |
344 | static inline int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h) | |
345 | { | |
346 | return rdmsr_safe(msr_no, l, h); | |
347 | } | |
348 | static inline int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h) | |
349 | { | |
350 | return wrmsr_safe(msr_no, l, h); | |
351 | } | |
352 | #endif /* CONFIG_SMP */ | |
56986d42 | 353 | #endif /* __KERNEL__ */ |
be7baf80 TG |
354 | #endif /* __ASSEMBLY__ */ |
355 | ||
356 | #endif /* !__i386__ */ | |
357 | ||
96a388de | 358 | #endif |