6 * Access to machine-specific registers (available on 586 and better only)
7 * Note: the rd* operations modify the parameters directly (without using
8 * pointer indirection), this allows gcc to optimize better
11 #define rdmsr(msr,val1,val2) \
12 __asm__ __volatile__("rdmsr" \
13 : "=a" (val1), "=d" (val2) \
17 #define rdmsrl(msr,val) do { unsigned long a__,b__; \
18 __asm__ __volatile__("rdmsr" \
19 : "=a" (a__), "=d" (b__) \
21 val = a__ | (b__<<32); \
24 #define wrmsr(msr,val1,val2) \
25 __asm__ __volatile__("wrmsr" \
27 : "c" (msr), "a" (val1), "d" (val2))
29 #define wrmsrl(msr,val) wrmsr(msr,(__u32)((__u64)(val)),((__u64)(val))>>32)
31 /* wrmsrl with exception handling */
32 #define checking_wrmsrl(msr,val) ({ int ret__; \
33 asm volatile("2: wrmsr ; xorl %0,%0\n" \
35 ".section .fixup,\"ax\"\n\t" \
36 "3: movl %4,%0 ; jmp 1b\n\t" \
38 ".section __ex_table,\"a\"\n" \
43 : "c" (msr), "0" ((__u32)val), "d" ((val)>>32), "i" (-EFAULT));\
46 #define rdtsc(low,high) \
47 __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
50 __asm__ __volatile__ ("rdtsc" : "=a" (low) : : "edx")
52 #define rdtscll(val) do { \
54 asm volatile("rdtsc" : "=a" (a), "=d" (d)); \
55 (val) = ((unsigned long)a) | (((unsigned long)d)<<32); \
58 #define rdpmc(counter,low,high) \
59 __asm__ __volatile__("rdpmc" \
60 : "=a" (low), "=d" (high) \
63 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
65 #define rdpmc(counter,low,high) \
66 __asm__ __volatile__("rdpmc" \
67 : "=a" (low), "=d" (high) \
72 /* AMD/K8 specific MSRs */
73 #define MSR_EFER 0xc0000080 /* extended feature register */
74 #define MSR_STAR 0xc0000081 /* legacy mode SYSCALL target */
75 #define MSR_LSTAR 0xc0000082 /* long mode SYSCALL target */
76 #define MSR_CSTAR 0xc0000083 /* compatibility mode SYSCALL target */
77 #define MSR_SYSCALL_MASK 0xc0000084 /* EFLAGS mask for syscall */
78 #define MSR_FS_BASE 0xc0000100 /* 64bit GS base */
79 #define MSR_GS_BASE 0xc0000101 /* 64bit FS base */
80 #define MSR_KERNEL_GS_BASE 0xc0000102 /* SwapGS GS shadow (or USER_GS from kernel) */
82 #define _EFER_SCE 0 /* SYSCALL/SYSRET */
83 #define _EFER_LME 8 /* Long mode enable */
84 #define _EFER_LMA 10 /* Long mode active (read-only) */
85 #define _EFER_NX 11 /* No execute enable */
87 #define EFER_SCE (1<<_EFER_SCE)
88 #define EFER_LME (1<<EFER_LME)
89 #define EFER_LMA (1<<EFER_LMA)
90 #define EFER_NX (1<<_EFER_NX)
92 /* Intel MSRs. Some also available on other CPUs */
93 #define MSR_IA32_PLATFORM_ID 0x17
95 #define MSR_IA32_PERFCTR0 0xc1
96 #define MSR_IA32_PERFCTR1 0xc2
98 #define MSR_MTRRcap 0x0fe
99 #define MSR_IA32_BBL_CR_CTL 0x119
101 #define MSR_IA32_MCG_CAP 0x179
102 #define MSR_IA32_MCG_STATUS 0x17a
103 #define MSR_IA32_MCG_CTL 0x17b
105 #define MSR_IA32_EVNTSEL0 0x186
106 #define MSR_IA32_EVNTSEL1 0x187
108 #define MSR_IA32_DEBUGCTLMSR 0x1d9
109 #define MSR_IA32_LASTBRANCHFROMIP 0x1db
110 #define MSR_IA32_LASTBRANCHTOIP 0x1dc
111 #define MSR_IA32_LASTINTFROMIP 0x1dd
112 #define MSR_IA32_LASTINTTOIP 0x1de
114 #define MSR_MTRRfix64K_00000 0x250
115 #define MSR_MTRRfix16K_80000 0x258
116 #define MSR_MTRRfix16K_A0000 0x259
117 #define MSR_MTRRfix4K_C0000 0x268
118 #define MSR_MTRRfix4K_C8000 0x269
119 #define MSR_MTRRfix4K_D0000 0x26a
120 #define MSR_MTRRfix4K_D8000 0x26b
121 #define MSR_MTRRfix4K_E0000 0x26c
122 #define MSR_MTRRfix4K_E8000 0x26d
123 #define MSR_MTRRfix4K_F0000 0x26e
124 #define MSR_MTRRfix4K_F8000 0x26f
125 #define MSR_MTRRdefType 0x2ff
127 #define MSR_IA32_MC0_CTL 0x400
128 #define MSR_IA32_MC0_STATUS 0x401
129 #define MSR_IA32_MC0_ADDR 0x402
130 #define MSR_IA32_MC0_MISC 0x403
132 #define MSR_P6_PERFCTR0 0xc1
133 #define MSR_P6_PERFCTR1 0xc2
134 #define MSR_P6_EVNTSEL0 0x186
135 #define MSR_P6_EVNTSEL1 0x187
137 /* K7/K8 MSRs. Not complete. See the architecture manual for a more complete list. */
138 #define MSR_K7_EVNTSEL0 0xC0010000
139 #define MSR_K7_PERFCTR0 0xC0010004
140 #define MSR_K7_EVNTSEL1 0xC0010001
141 #define MSR_K7_PERFCTR1 0xC0010005
142 #define MSR_K7_EVNTSEL2 0xC0010002
143 #define MSR_K7_PERFCTR2 0xC0010006
144 #define MSR_K7_EVNTSEL3 0xC0010003
145 #define MSR_K7_PERFCTR3 0xC0010007
146 #define MSR_K8_TOP_MEM1 0xC001001A
147 #define MSR_K8_TOP_MEM2 0xC001001D
148 #define MSR_K8_SYSCFG 0xC0000010
151 #define MSR_K6_EFER 0xC0000080
152 #define MSR_K6_STAR 0xC0000081
153 #define MSR_K6_WHCR 0xC0000082
154 #define MSR_K6_UWCCR 0xC0000085
155 #define MSR_K6_PSOR 0xC0000087
156 #define MSR_K6_PFIR 0xC0000088
158 /* Centaur-Hauls/IDT defined MSRs. */
159 #define MSR_IDT_FCR1 0x107
160 #define MSR_IDT_FCR2 0x108
161 #define MSR_IDT_FCR3 0x109
162 #define MSR_IDT_FCR4 0x10a
164 #define MSR_IDT_MCR0 0x110
165 #define MSR_IDT_MCR1 0x111
166 #define MSR_IDT_MCR2 0x112
167 #define MSR_IDT_MCR3 0x113
168 #define MSR_IDT_MCR4 0x114
169 #define MSR_IDT_MCR5 0x115
170 #define MSR_IDT_MCR6 0x116
171 #define MSR_IDT_MCR7 0x117
172 #define MSR_IDT_MCR_CTRL 0x120
174 /* VIA Cyrix defined MSRs*/
175 #define MSR_VIA_FCR 0x1107
176 #define MSR_VIA_LONGHAUL 0x110a
177 #define MSR_VIA_RNG 0x110b
178 #define MSR_VIA_BCR2 0x1147
180 /* Intel defined MSRs. */
181 #define MSR_IA32_P5_MC_ADDR 0
182 #define MSR_IA32_P5_MC_TYPE 1
183 #define MSR_IA32_PLATFORM_ID 0x17
184 #define MSR_IA32_EBL_CR_POWERON 0x2a
186 #define MSR_IA32_APICBASE 0x1b
187 #define MSR_IA32_APICBASE_BSP (1<<8)
188 #define MSR_IA32_APICBASE_ENABLE (1<<11)
189 #define MSR_IA32_APICBASE_BASE (0xfffff<<12)