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1/*
2 * Defines x86 CPU feature bits
3 */
1965aae3
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4#ifndef _ASM_X86_CPUFEATURE_H
5#define _ASM_X86_CPUFEATURE_H
7b11fb51 6
abbf1590 7#ifndef _ASM_X86_REQUIRED_FEATURES_H
7b11fb51 8#include <asm/required-features.h>
abbf1590 9#endif
7b11fb51 10
6229ad27 11#define NCAPINTS 11 /* N 32-bit words worth of info */
65fc985b 12#define NBUGINTS 1 /* N 32-bit bug flags */
7b11fb51 13
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14/*
15 * Note: If the comment begins with a quoted string, that string is used
16 * in /proc/cpuinfo instead of the macro name. If the string is "",
17 * this feature bit is not displayed in /proc/cpuinfo at all.
18 */
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19
20/* Intel-defined CPU features, CPUID level 0x00000001 (edx), word 0 */
446fd806
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21#define X86_FEATURE_FPU ( 0*32+ 0) /* Onboard FPU */
22#define X86_FEATURE_VME ( 0*32+ 1) /* Virtual Mode Extensions */
23#define X86_FEATURE_DE ( 0*32+ 2) /* Debugging Extensions */
24#define X86_FEATURE_PSE ( 0*32+ 3) /* Page Size Extensions */
25#define X86_FEATURE_TSC ( 0*32+ 4) /* Time Stamp Counter */
26#define X86_FEATURE_MSR ( 0*32+ 5) /* Model-Specific Registers */
27#define X86_FEATURE_PAE ( 0*32+ 6) /* Physical Address Extensions */
28#define X86_FEATURE_MCE ( 0*32+ 7) /* Machine Check Exception */
29#define X86_FEATURE_CX8 ( 0*32+ 8) /* CMPXCHG8 instruction */
30#define X86_FEATURE_APIC ( 0*32+ 9) /* Onboard APIC */
31#define X86_FEATURE_SEP ( 0*32+11) /* SYSENTER/SYSEXIT */
32#define X86_FEATURE_MTRR ( 0*32+12) /* Memory Type Range Registers */
33#define X86_FEATURE_PGE ( 0*32+13) /* Page Global Enable */
34#define X86_FEATURE_MCA ( 0*32+14) /* Machine Check Architecture */
35#define X86_FEATURE_CMOV ( 0*32+15) /* CMOV instructions */
2798c63e 36 /* (plus FCMOVcc, FCOMI with FPU) */
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37#define X86_FEATURE_PAT ( 0*32+16) /* Page Attribute Table */
38#define X86_FEATURE_PSE36 ( 0*32+17) /* 36-bit PSEs */
39#define X86_FEATURE_PN ( 0*32+18) /* Processor serial number */
40#define X86_FEATURE_CLFLUSH ( 0*32+19) /* CLFLUSH instruction */
41#define X86_FEATURE_DS ( 0*32+21) /* "dts" Debug Store */
42#define X86_FEATURE_ACPI ( 0*32+22) /* ACPI via MSR */
43#define X86_FEATURE_MMX ( 0*32+23) /* Multimedia Extensions */
44#define X86_FEATURE_FXSR ( 0*32+24) /* FXSAVE/FXRSTOR, CR4.OSFXSR */
45#define X86_FEATURE_XMM ( 0*32+25) /* "sse" */
46#define X86_FEATURE_XMM2 ( 0*32+26) /* "sse2" */
47#define X86_FEATURE_SELFSNOOP ( 0*32+27) /* "ss" CPU self snoop */
48#define X86_FEATURE_HT ( 0*32+28) /* Hyper-Threading */
49#define X86_FEATURE_ACC ( 0*32+29) /* "tm" Automatic clock control */
50#define X86_FEATURE_IA64 ( 0*32+30) /* IA-64 processor */
51#define X86_FEATURE_PBE ( 0*32+31) /* Pending Break Enable */
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52
53/* AMD-defined CPU features, CPUID level 0x80000001, word 1 */
54/* Don't duplicate feature flags which are redundant with Intel! */
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55#define X86_FEATURE_SYSCALL ( 1*32+11) /* SYSCALL/SYSRET */
56#define X86_FEATURE_MP ( 1*32+19) /* MP Capable. */
57#define X86_FEATURE_NX ( 1*32+20) /* Execute Disable */
58#define X86_FEATURE_MMXEXT ( 1*32+22) /* AMD MMX extensions */
59#define X86_FEATURE_FXSR_OPT ( 1*32+25) /* FXSAVE/FXRSTOR optimizations */
60#define X86_FEATURE_GBPAGES ( 1*32+26) /* "pdpe1gb" GB pages */
61#define X86_FEATURE_RDTSCP ( 1*32+27) /* RDTSCP */
62#define X86_FEATURE_LM ( 1*32+29) /* Long Mode (x86-64) */
63#define X86_FEATURE_3DNOWEXT ( 1*32+30) /* AMD 3DNow! extensions */
64#define X86_FEATURE_3DNOW ( 1*32+31) /* 3DNow! */
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65
66/* Transmeta-defined CPU features, CPUID level 0x80860001, word 2 */
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67#define X86_FEATURE_RECOVERY ( 2*32+ 0) /* CPU in recovery mode */
68#define X86_FEATURE_LONGRUN ( 2*32+ 1) /* Longrun power control */
69#define X86_FEATURE_LRTI ( 2*32+ 3) /* LongRun table interface */
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70
71/* Other features, Linux-defined mapping, word 3 */
72/* This range is used for feature bits which conflict or are synthesized */
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73#define X86_FEATURE_CXMMX ( 3*32+ 0) /* Cyrix MMX extensions */
74#define X86_FEATURE_K6_MTRR ( 3*32+ 1) /* AMD K6 nonstandard MTRRs */
75#define X86_FEATURE_CYRIX_ARR ( 3*32+ 2) /* Cyrix ARRs (= MTRRs) */
76#define X86_FEATURE_CENTAUR_MCR ( 3*32+ 3) /* Centaur MCRs (= MTRRs) */
7b11fb51 77/* cpu types for specific tunings: */
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78#define X86_FEATURE_K8 ( 3*32+ 4) /* "" Opteron, Athlon64 */
79#define X86_FEATURE_K7 ( 3*32+ 5) /* "" Athlon */
80#define X86_FEATURE_P3 ( 3*32+ 6) /* "" P3 */
81#define X86_FEATURE_P4 ( 3*32+ 7) /* "" P4 */
82#define X86_FEATURE_CONSTANT_TSC ( 3*32+ 8) /* TSC ticks at a constant rate */
83#define X86_FEATURE_UP ( 3*32+ 9) /* smp kernel running on up */
9b13a93d 84/* free, was #define X86_FEATURE_FXSAVE_LEAK ( 3*32+10) * "" FXSAVE leaks FOP/FIP/FOP */
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85#define X86_FEATURE_ARCH_PERFMON ( 3*32+11) /* Intel Architectural PerfMon */
86#define X86_FEATURE_PEBS ( 3*32+12) /* Precise-Event Based Sampling */
87#define X86_FEATURE_BTS ( 3*32+13) /* Branch Trace Store */
88#define X86_FEATURE_SYSCALL32 ( 3*32+14) /* "" syscall in ia32 userspace */
89#define X86_FEATURE_SYSENTER32 ( 3*32+15) /* "" sysenter in ia32 userspace */
90#define X86_FEATURE_REP_GOOD ( 3*32+16) /* rep microcode works well */
91#define X86_FEATURE_MFENCE_RDTSC ( 3*32+17) /* "" Mfence synchronizes RDTSC */
92#define X86_FEATURE_LFENCE_RDTSC ( 3*32+18) /* "" Lfence synchronizes RDTSC */
9b13a93d 93/* free, was #define X86_FEATURE_11AP ( 3*32+19) * "" Bad local APIC aka 11AP */
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94#define X86_FEATURE_NOPL ( 3*32+20) /* The NOPL (0F 1F) instructions */
95#define X86_FEATURE_ALWAYS ( 3*32+21) /* "" Always-present feature */
96#define X86_FEATURE_XTOPOLOGY ( 3*32+22) /* cpu topology enum extensions */
97#define X86_FEATURE_TSC_RELIABLE ( 3*32+23) /* TSC is known to be reliable */
98#define X86_FEATURE_NONSTOP_TSC ( 3*32+24) /* TSC does not stop in C states */
9b13a93d 99/* free, was #define X86_FEATURE_CLFLUSH_MONITOR ( 3*32+25) * "" clflush reqd with monitor */
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100#define X86_FEATURE_EXTD_APICID ( 3*32+26) /* has extended APICID (8 bits) */
101#define X86_FEATURE_AMD_DCM ( 3*32+27) /* multi-node processor */
102#define X86_FEATURE_APERFMPERF ( 3*32+28) /* APERFMPERF */
103#define X86_FEATURE_EAGER_FPU ( 3*32+29) /* "eagerfpu" Non lazy FPU restore */
104#define X86_FEATURE_NONSTOP_TSC_S3 ( 3*32+30) /* TSC doesn't stop in S3 state */
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105
106/* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */
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107#define X86_FEATURE_XMM3 ( 4*32+ 0) /* "pni" SSE-3 */
108#define X86_FEATURE_PCLMULQDQ ( 4*32+ 1) /* PCLMULQDQ instruction */
109#define X86_FEATURE_DTES64 ( 4*32+ 2) /* 64-bit Debug Store */
110#define X86_FEATURE_MWAIT ( 4*32+ 3) /* "monitor" Monitor/Mwait support */
111#define X86_FEATURE_DSCPL ( 4*32+ 4) /* "ds_cpl" CPL Qual. Debug Store */
112#define X86_FEATURE_VMX ( 4*32+ 5) /* Hardware virtualization */
113#define X86_FEATURE_SMX ( 4*32+ 6) /* Safer mode */
114#define X86_FEATURE_EST ( 4*32+ 7) /* Enhanced SpeedStep */
115#define X86_FEATURE_TM2 ( 4*32+ 8) /* Thermal Monitor 2 */
116#define X86_FEATURE_SSSE3 ( 4*32+ 9) /* Supplemental SSE-3 */
117#define X86_FEATURE_CID ( 4*32+10) /* Context ID */
118#define X86_FEATURE_FMA ( 4*32+12) /* Fused multiply-add */
119#define X86_FEATURE_CX16 ( 4*32+13) /* CMPXCHG16B */
120#define X86_FEATURE_XTPR ( 4*32+14) /* Send Task Priority Messages */
121#define X86_FEATURE_PDCM ( 4*32+15) /* Performance Capabilities */
122#define X86_FEATURE_PCID ( 4*32+17) /* Process Context Identifiers */
123#define X86_FEATURE_DCA ( 4*32+18) /* Direct Cache Access */
124#define X86_FEATURE_XMM4_1 ( 4*32+19) /* "sse4_1" SSE-4.1 */
125#define X86_FEATURE_XMM4_2 ( 4*32+20) /* "sse4_2" SSE-4.2 */
126#define X86_FEATURE_X2APIC ( 4*32+21) /* x2APIC */
127#define X86_FEATURE_MOVBE ( 4*32+22) /* MOVBE instruction */
128#define X86_FEATURE_POPCNT ( 4*32+23) /* POPCNT instruction */
129#define X86_FEATURE_TSC_DEADLINE_TIMER ( 4*32+24) /* Tsc deadline timer */
130#define X86_FEATURE_AES ( 4*32+25) /* AES instructions */
131#define X86_FEATURE_XSAVE ( 4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV */
132#define X86_FEATURE_OSXSAVE ( 4*32+27) /* "" XSAVE enabled in the OS */
133#define X86_FEATURE_AVX ( 4*32+28) /* Advanced Vector Extensions */
134#define X86_FEATURE_F16C ( 4*32+29) /* 16-bit fp conversions */
135#define X86_FEATURE_RDRAND ( 4*32+30) /* The RDRAND instruction */
136#define X86_FEATURE_HYPERVISOR ( 4*32+31) /* Running on a hypervisor */
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137
138/* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
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139#define X86_FEATURE_XSTORE ( 5*32+ 2) /* "rng" RNG present (xstore) */
140#define X86_FEATURE_XSTORE_EN ( 5*32+ 3) /* "rng_en" RNG enabled */
141#define X86_FEATURE_XCRYPT ( 5*32+ 6) /* "ace" on-CPU crypto (xcrypt) */
142#define X86_FEATURE_XCRYPT_EN ( 5*32+ 7) /* "ace_en" on-CPU crypto enabled */
143#define X86_FEATURE_ACE2 ( 5*32+ 8) /* Advanced Cryptography Engine v2 */
144#define X86_FEATURE_ACE2_EN ( 5*32+ 9) /* ACE v2 enabled */
145#define X86_FEATURE_PHE ( 5*32+10) /* PadLock Hash Engine */
146#define X86_FEATURE_PHE_EN ( 5*32+11) /* PHE enabled */
147#define X86_FEATURE_PMM ( 5*32+12) /* PadLock Montgomery Multiplier */
148#define X86_FEATURE_PMM_EN ( 5*32+13) /* PMM enabled */
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149
150/* More extended AMD flags: CPUID level 0x80000001, ecx, word 6 */
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151#define X86_FEATURE_LAHF_LM ( 6*32+ 0) /* LAHF/SAHF in long mode */
152#define X86_FEATURE_CMP_LEGACY ( 6*32+ 1) /* If yes HyperThreading not valid */
153#define X86_FEATURE_SVM ( 6*32+ 2) /* Secure virtual machine */
154#define X86_FEATURE_EXTAPIC ( 6*32+ 3) /* Extended APIC space */
155#define X86_FEATURE_CR8_LEGACY ( 6*32+ 4) /* CR8 in 32-bit mode */
156#define X86_FEATURE_ABM ( 6*32+ 5) /* Advanced bit manipulation */
157#define X86_FEATURE_SSE4A ( 6*32+ 6) /* SSE-4A */
158#define X86_FEATURE_MISALIGNSSE ( 6*32+ 7) /* Misaligned SSE mode */
159#define X86_FEATURE_3DNOWPREFETCH ( 6*32+ 8) /* 3DNow prefetch instructions */
160#define X86_FEATURE_OSVW ( 6*32+ 9) /* OS Visible Workaround */
161#define X86_FEATURE_IBS ( 6*32+10) /* Instruction Based Sampling */
162#define X86_FEATURE_XOP ( 6*32+11) /* extended AVX instructions */
163#define X86_FEATURE_SKINIT ( 6*32+12) /* SKINIT/STGI instructions */
164#define X86_FEATURE_WDT ( 6*32+13) /* Watchdog timer */
165#define X86_FEATURE_LWP ( 6*32+15) /* Light Weight Profiling */
166#define X86_FEATURE_FMA4 ( 6*32+16) /* 4 operands MAC instructions */
167#define X86_FEATURE_TCE ( 6*32+17) /* translation cache extension */
168#define X86_FEATURE_NODEID_MSR ( 6*32+19) /* NodeId MSR */
169#define X86_FEATURE_TBM ( 6*32+21) /* trailing bit manipulations */
170#define X86_FEATURE_TOPOEXT ( 6*32+22) /* topology extensions CPUID leafs */
171#define X86_FEATURE_PERFCTR_CORE ( 6*32+23) /* core performance counter extensions */
172#define X86_FEATURE_PERFCTR_NB ( 6*32+24) /* NB performance counter extensions */
173#define X86_FEATURE_PERFCTR_L2 ( 6*32+28) /* L2 performance counter extensions */
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174
175/*
176 * Auxiliary flags: Linux defined - For features scattered in various
bdc802dc 177 * CPUID levels like 0x6, 0xA etc, word 7
7b11fb51 178 */
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179#define X86_FEATURE_IDA ( 7*32+ 0) /* Intel Dynamic Acceleration */
180#define X86_FEATURE_ARAT ( 7*32+ 1) /* Always Running APIC Timer */
181#define X86_FEATURE_CPB ( 7*32+ 2) /* AMD Core Performance Boost */
182#define X86_FEATURE_EPB ( 7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */
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183#define X86_FEATURE_PLN ( 7*32+ 5) /* Intel Power Limit Notification */
184#define X86_FEATURE_PTS ( 7*32+ 6) /* Intel Package Thermal Status */
185#define X86_FEATURE_DTHERM ( 7*32+ 7) /* Digital Thermal Sensor */
186#define X86_FEATURE_HW_PSTATE ( 7*32+ 8) /* AMD HW-PState */
187#define X86_FEATURE_PROC_FEEDBACK ( 7*32+ 9) /* AMD ProcFeedbackInterface */
7b11fb51 188
bdc802dc 189/* Virtualization flags: Linux defined, word 8 */
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190#define X86_FEATURE_TPR_SHADOW ( 8*32+ 0) /* Intel TPR Shadow */
191#define X86_FEATURE_VNMI ( 8*32+ 1) /* Intel Virtual NMI */
192#define X86_FEATURE_FLEXPRIORITY ( 8*32+ 2) /* Intel FlexPriority */
193#define X86_FEATURE_EPT ( 8*32+ 3) /* Intel Extended Page Table */
194#define X86_FEATURE_VPID ( 8*32+ 4) /* Intel Virtual Processor ID */
195#define X86_FEATURE_NPT ( 8*32+ 5) /* AMD Nested Page Table support */
196#define X86_FEATURE_LBRV ( 8*32+ 6) /* AMD LBR Virtualization support */
197#define X86_FEATURE_SVML ( 8*32+ 7) /* "svm_lock" AMD SVM locking MSR */
198#define X86_FEATURE_NRIPS ( 8*32+ 8) /* "nrip_save" AMD SVM next_rip save */
199#define X86_FEATURE_TSCRATEMSR ( 8*32+ 9) /* "tsc_scale" AMD TSC scaling support */
200#define X86_FEATURE_VMCBCLEAN ( 8*32+10) /* "vmcb_clean" AMD VMCB clean bits support */
201#define X86_FEATURE_FLUSHBYASID ( 8*32+11) /* AMD flush-by-ASID support */
202#define X86_FEATURE_DECODEASSISTS ( 8*32+12) /* AMD Decode Assists support */
203#define X86_FEATURE_PAUSEFILTER ( 8*32+13) /* AMD filtered pause intercept */
204#define X86_FEATURE_PFTHRESHOLD ( 8*32+14) /* AMD pause filter threshold */
aeb9c7d6 205
e38e05a8 206
bdc802dc 207/* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx), word 9 */
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208#define X86_FEATURE_FSGSBASE ( 9*32+ 0) /* {RD/WR}{FS/GS}BASE instructions*/
209#define X86_FEATURE_TSC_ADJUST ( 9*32+ 1) /* TSC adjustment MSR 0x3b */
210#define X86_FEATURE_BMI1 ( 9*32+ 3) /* 1st group bit manipulation extensions */
211#define X86_FEATURE_HLE ( 9*32+ 4) /* Hardware Lock Elision */
212#define X86_FEATURE_AVX2 ( 9*32+ 5) /* AVX2 instructions */
213#define X86_FEATURE_SMEP ( 9*32+ 7) /* Supervisor Mode Execution Protection */
214#define X86_FEATURE_BMI2 ( 9*32+ 8) /* 2nd group bit manipulation extensions */
215#define X86_FEATURE_ERMS ( 9*32+ 9) /* Enhanced REP MOVSB/STOSB */
216#define X86_FEATURE_INVPCID ( 9*32+10) /* Invalidate Processor Context ID */
217#define X86_FEATURE_RTM ( 9*32+11) /* Restricted Transactional Memory */
218#define X86_FEATURE_MPX ( 9*32+14) /* Memory Protection Extension */
219#define X86_FEATURE_AVX512F ( 9*32+16) /* AVX-512 Foundation */
220#define X86_FEATURE_RDSEED ( 9*32+18) /* The RDSEED instruction */
221#define X86_FEATURE_ADX ( 9*32+19) /* The ADCX and ADOX instructions */
222#define X86_FEATURE_SMAP ( 9*32+20) /* Supervisor Mode Access Prevention */
223#define X86_FEATURE_CLFLUSHOPT ( 9*32+23) /* CLFLUSHOPT instruction */
224#define X86_FEATURE_AVX512PF ( 9*32+26) /* AVX-512 Prefetch */
225#define X86_FEATURE_AVX512ER ( 9*32+27) /* AVX-512 Exponential and Reciprocal */
226#define X86_FEATURE_AVX512CD ( 9*32+28) /* AVX-512 Conflict Detection */
bdc802dc 227
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228/* Extended state features, CPUID level 0x0000000d:1 (eax), word 10 */
229#define X86_FEATURE_XSAVEOPT (10*32+ 0) /* XSAVEOPT */
230#define X86_FEATURE_XSAVEC (10*32+ 1) /* XSAVEC */
231#define X86_FEATURE_XGETBV1 (10*32+ 2) /* XGETBV with ECX = 1 */
232#define X86_FEATURE_XSAVES (10*32+ 3) /* XSAVES/XRSTORS */
233
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234/*
235 * BUG word(s)
236 */
237#define X86_BUG(x) (NCAPINTS*32 + (x))
238
e2604b49 239#define X86_BUG_F00F X86_BUG(0) /* Intel F00F */
93a829e8 240#define X86_BUG_FDIV X86_BUG(1) /* FPU FDIV */
c5b41a67 241#define X86_BUG_COMA X86_BUG(2) /* Cyrix 6x86 coma */
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242#define X86_BUG_AMD_TLB_MMATCH X86_BUG(3) /* "tlb_mmatch" AMD Erratum 383 */
243#define X86_BUG_AMD_APIC_C1E X86_BUG(4) /* "apic_c1e" AMD Erratum 400 */
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244#define X86_BUG_11AP X86_BUG(5) /* Bad local APIC aka 11AP */
245#define X86_BUG_FXSAVE_LEAK X86_BUG(6) /* FXSAVE leaks FOP/FIP/FOP */
246#define X86_BUG_CLFLUSH_MONITOR X86_BUG(7) /* AAI65, CLFLUSH required before MONITOR */
e2604b49 247
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248#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
249
a3c8acd0 250#include <asm/asm.h>
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251#include <linux/bitops.h>
252
253extern const char * const x86_cap_flags[NCAPINTS*32];
254extern const char * const x86_power_flags[32];
255
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256/*
257 * In order to save room, we index into this array by doing
258 * X86_BUG_<name> - NCAPINTS*32.
259 */
260extern const char * const x86_bug_flags[NBUGINTS*32];
261
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262#define test_cpu_cap(c, bit) \
263 test_bit(bit, (unsigned long *)((c)->x86_capability))
264
349c004e 265#define REQUIRED_MASK_BIT_SET(bit) \
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266 ( (((bit)>>5)==0 && (1UL<<((bit)&31) & REQUIRED_MASK0)) || \
267 (((bit)>>5)==1 && (1UL<<((bit)&31) & REQUIRED_MASK1)) || \
268 (((bit)>>5)==2 && (1UL<<((bit)&31) & REQUIRED_MASK2)) || \
269 (((bit)>>5)==3 && (1UL<<((bit)&31) & REQUIRED_MASK3)) || \
270 (((bit)>>5)==4 && (1UL<<((bit)&31) & REQUIRED_MASK4)) || \
271 (((bit)>>5)==5 && (1UL<<((bit)&31) & REQUIRED_MASK5)) || \
272 (((bit)>>5)==6 && (1UL<<((bit)&31) & REQUIRED_MASK6)) || \
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273 (((bit)>>5)==7 && (1UL<<((bit)&31) & REQUIRED_MASK7)) || \
274 (((bit)>>5)==8 && (1UL<<((bit)&31) & REQUIRED_MASK8)) || \
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275 (((bit)>>5)==9 && (1UL<<((bit)&31) & REQUIRED_MASK9)) )
276
277#define cpu_has(c, bit) \
278 (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
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279 test_cpu_cap(c, bit))
280
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281#define this_cpu_has(bit) \
282 (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
283 x86_this_cpu_test_bit(bit, (unsigned long *)&cpu_info.x86_capability))
284
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285#define boot_cpu_has(bit) cpu_has(&boot_cpu_data, bit)
286
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287#define set_cpu_cap(c, bit) set_bit(bit, (unsigned long *)((c)->x86_capability))
288#define clear_cpu_cap(c, bit) clear_bit(bit, (unsigned long *)((c)->x86_capability))
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289#define setup_clear_cpu_cap(bit) do { \
290 clear_cpu_cap(&boot_cpu_data, bit); \
3e0c3737 291 set_bit(bit, (unsigned long *)cpu_caps_cleared); \
7d851c8d 292} while (0)
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293#define setup_force_cpu_cap(bit) do { \
294 set_cpu_cap(&boot_cpu_data, bit); \
3e0c3737 295 set_bit(bit, (unsigned long *)cpu_caps_set); \
404ee5b1 296} while (0)
53756d37 297
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298#define cpu_has_fpu boot_cpu_has(X86_FEATURE_FPU)
299#define cpu_has_vme boot_cpu_has(X86_FEATURE_VME)
300#define cpu_has_de boot_cpu_has(X86_FEATURE_DE)
301#define cpu_has_pse boot_cpu_has(X86_FEATURE_PSE)
302#define cpu_has_tsc boot_cpu_has(X86_FEATURE_TSC)
303#define cpu_has_pae boot_cpu_has(X86_FEATURE_PAE)
304#define cpu_has_pge boot_cpu_has(X86_FEATURE_PGE)
305#define cpu_has_apic boot_cpu_has(X86_FEATURE_APIC)
306#define cpu_has_sep boot_cpu_has(X86_FEATURE_SEP)
307#define cpu_has_mtrr boot_cpu_has(X86_FEATURE_MTRR)
308#define cpu_has_mmx boot_cpu_has(X86_FEATURE_MMX)
309#define cpu_has_fxsr boot_cpu_has(X86_FEATURE_FXSR)
310#define cpu_has_xmm boot_cpu_has(X86_FEATURE_XMM)
311#define cpu_has_xmm2 boot_cpu_has(X86_FEATURE_XMM2)
312#define cpu_has_xmm3 boot_cpu_has(X86_FEATURE_XMM3)
66be8951 313#define cpu_has_ssse3 boot_cpu_has(X86_FEATURE_SSSE3)
54b6a1bd 314#define cpu_has_aes boot_cpu_has(X86_FEATURE_AES)
66be8951 315#define cpu_has_avx boot_cpu_has(X86_FEATURE_AVX)
60488010 316#define cpu_has_avx2 boot_cpu_has(X86_FEATURE_AVX2)
7b11fb51 317#define cpu_has_ht boot_cpu_has(X86_FEATURE_HT)
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318#define cpu_has_nx boot_cpu_has(X86_FEATURE_NX)
319#define cpu_has_k6_mtrr boot_cpu_has(X86_FEATURE_K6_MTRR)
320#define cpu_has_cyrix_arr boot_cpu_has(X86_FEATURE_CYRIX_ARR)
321#define cpu_has_centaur_mcr boot_cpu_has(X86_FEATURE_CENTAUR_MCR)
322#define cpu_has_xstore boot_cpu_has(X86_FEATURE_XSTORE)
323#define cpu_has_xstore_enabled boot_cpu_has(X86_FEATURE_XSTORE_EN)
324#define cpu_has_xcrypt boot_cpu_has(X86_FEATURE_XCRYPT)
325#define cpu_has_xcrypt_enabled boot_cpu_has(X86_FEATURE_XCRYPT_EN)
326#define cpu_has_ace2 boot_cpu_has(X86_FEATURE_ACE2)
327#define cpu_has_ace2_enabled boot_cpu_has(X86_FEATURE_ACE2_EN)
328#define cpu_has_phe boot_cpu_has(X86_FEATURE_PHE)
329#define cpu_has_phe_enabled boot_cpu_has(X86_FEATURE_PHE_EN)
330#define cpu_has_pmm boot_cpu_has(X86_FEATURE_PMM)
331#define cpu_has_pmm_enabled boot_cpu_has(X86_FEATURE_PMM_EN)
332#define cpu_has_ds boot_cpu_has(X86_FEATURE_DS)
333#define cpu_has_pebs boot_cpu_has(X86_FEATURE_PEBS)
840d2830 334#define cpu_has_clflush boot_cpu_has(X86_FEATURE_CLFLUSH)
7b11fb51 335#define cpu_has_bts boot_cpu_has(X86_FEATURE_BTS)
019c3e7c 336#define cpu_has_gbpages boot_cpu_has(X86_FEATURE_GBPAGES)
86975101 337#define cpu_has_arch_perfmon boot_cpu_has(X86_FEATURE_ARCH_PERFMON)
2e5d9c85 338#define cpu_has_pat boot_cpu_has(X86_FEATURE_PAT)
f1240c00 339#define cpu_has_xmm4_1 boot_cpu_has(X86_FEATURE_XMM4_1)
2a61812a 340#define cpu_has_xmm4_2 boot_cpu_has(X86_FEATURE_XMM4_2)
32e1d0a0 341#define cpu_has_x2apic boot_cpu_has(X86_FEATURE_X2APIC)
f1240c00 342#define cpu_has_xsave boot_cpu_has(X86_FEATURE_XSAVE)
212b0212 343#define cpu_has_xsaveopt boot_cpu_has(X86_FEATURE_XSAVEOPT)
6229ad27 344#define cpu_has_xsaves boot_cpu_has(X86_FEATURE_XSAVES)
66be8951 345#define cpu_has_osxsave boot_cpu_has(X86_FEATURE_OSXSAVE)
49ab56ac 346#define cpu_has_hypervisor boot_cpu_has(X86_FEATURE_HYPERVISOR)
0e1227d3 347#define cpu_has_pclmulqdq boot_cpu_has(X86_FEATURE_PCLMULQDQ)
4979d272 348#define cpu_has_perfctr_core boot_cpu_has(X86_FEATURE_PERFCTR_CORE)
e259514e 349#define cpu_has_perfctr_nb boot_cpu_has(X86_FEATURE_PERFCTR_NB)
c43ca509 350#define cpu_has_perfctr_l2 boot_cpu_has(X86_FEATURE_PERFCTR_L2)
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351#define cpu_has_cx8 boot_cpu_has(X86_FEATURE_CX8)
352#define cpu_has_cx16 boot_cpu_has(X86_FEATURE_CX16)
5d2bd700 353#define cpu_has_eager_fpu boot_cpu_has(X86_FEATURE_EAGER_FPU)
193f3fcb 354#define cpu_has_topoext boot_cpu_has(X86_FEATURE_TOPOEXT)
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355
356#ifdef CONFIG_X86_64
357
358#undef cpu_has_vme
359#define cpu_has_vme 0
360
361#undef cpu_has_pae
362#define cpu_has_pae ___BUG___
363
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364#undef cpu_has_k6_mtrr
365#define cpu_has_k6_mtrr 0
366
367#undef cpu_has_cyrix_arr
368#define cpu_has_cyrix_arr 0
369
370#undef cpu_has_centaur_mcr
371#define cpu_has_centaur_mcr 0
372
373#endif /* CONFIG_X86_64 */
374
2fd81864 375#if __GNUC__ >= 4
5700f743 376extern void warn_pre_alternatives(void);
4a90a99c 377extern bool __static_cpu_has_safe(u16 bit);
5700f743 378
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379/*
380 * Static testing of CPU features. Used the same as boot_cpu_has().
381 * These are only valid after alternatives have run, but will statically
382 * patch the target code for additional performance.
a3c8acd0 383 */
83a7a2ad 384static __always_inline __pure bool __static_cpu_has(u16 bit)
a3c8acd0 385{
62122fd7 386#ifdef CC_HAVE_ASM_GOTO
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387
388#ifdef CONFIG_X86_DEBUG_STATIC_CPU_HAS
62122fd7 389
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390 /*
391 * Catch too early usage of this before alternatives
392 * have run.
393 */
3f0116c3 394 asm_volatile_goto("1: jmp %l[t_warn]\n"
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395 "2:\n"
396 ".section .altinstructions,\"a\"\n"
397 " .long 1b - .\n"
398 " .long 0\n" /* no replacement */
399 " .word %P0\n" /* 1: do replace */
400 " .byte 2b - 1b\n" /* source len */
401 " .byte 0\n" /* replacement len */
402 ".previous\n"
403 /* skipping size check since replacement size = 0 */
404 : : "i" (X86_FEATURE_ALWAYS) : : t_warn);
62122fd7 405
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406#endif
407
3f0116c3 408 asm_volatile_goto("1: jmp %l[t_no]\n"
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409 "2:\n"
410 ".section .altinstructions,\"a\"\n"
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411 " .long 1b - .\n"
412 " .long 0\n" /* no replacement */
83a7a2ad 413 " .word %P0\n" /* feature bit */
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414 " .byte 2b - 1b\n" /* source len */
415 " .byte 0\n" /* replacement len */
a3c8acd0 416 ".previous\n"
83a7a2ad 417 /* skipping size check since replacement size = 0 */
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418 : : "i" (bit) : : t_no);
419 return true;
420 t_no:
421 return false;
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422
423#ifdef CONFIG_X86_DEBUG_STATIC_CPU_HAS
424 t_warn:
425 warn_pre_alternatives();
426 return false;
427#endif
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428
429#else /* CC_HAVE_ASM_GOTO */
430
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431 u8 flag;
432 /* Open-coded due to __stringify() in ALTERNATIVE() */
433 asm volatile("1: movb $0,%0\n"
434 "2:\n"
435 ".section .altinstructions,\"a\"\n"
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436 " .long 1b - .\n"
437 " .long 3f - .\n"
83a7a2ad 438 " .word %P1\n" /* feature bit */
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439 " .byte 2b - 1b\n" /* source len */
440 " .byte 4f - 3f\n" /* replacement len */
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441 ".previous\n"
442 ".section .discard,\"aw\",@progbits\n"
443 " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
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444 ".previous\n"
445 ".section .altinstr_replacement,\"ax\"\n"
446 "3: movb $1,%0\n"
447 "4:\n"
448 ".previous\n"
449 : "=qm" (flag) : "i" (bit));
450 return flag;
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451
452#endif /* CC_HAVE_ASM_GOTO */
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453}
454
455#define static_cpu_has(bit) \
456( \
457 __builtin_constant_p(boot_cpu_has(bit)) ? \
458 boot_cpu_has(bit) : \
83a7a2ad 459 __builtin_constant_p(bit) ? \
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460 __static_cpu_has(bit) : \
461 boot_cpu_has(bit) \
462)
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463
464static __always_inline __pure bool _static_cpu_has_safe(u16 bit)
465{
62122fd7 466#ifdef CC_HAVE_ASM_GOTO
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467/*
468 * We need to spell the jumps to the compiler because, depending on the offset,
469 * the replacement jump can be bigger than the original jump, and this we cannot
470 * have. Thus, we force the jump to the widest, 4-byte, signed relative
471 * offset even though the last would often fit in less bytes.
472 */
3f0116c3 473 asm_volatile_goto("1: .byte 0xe9\n .long %l[t_dynamic] - 2f\n"
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474 "2:\n"
475 ".section .altinstructions,\"a\"\n"
476 " .long 1b - .\n" /* src offset */
477 " .long 3f - .\n" /* repl offset */
478 " .word %P1\n" /* always replace */
479 " .byte 2b - 1b\n" /* src len */
480 " .byte 4f - 3f\n" /* repl len */
481 ".previous\n"
482 ".section .altinstr_replacement,\"ax\"\n"
483 "3: .byte 0xe9\n .long %l[t_no] - 2b\n"
484 "4:\n"
485 ".previous\n"
486 ".section .altinstructions,\"a\"\n"
487 " .long 1b - .\n" /* src offset */
488 " .long 0\n" /* no replacement */
489 " .word %P0\n" /* feature bit */
490 " .byte 2b - 1b\n" /* src len */
491 " .byte 0\n" /* repl len */
492 ".previous\n"
493 : : "i" (bit), "i" (X86_FEATURE_ALWAYS)
494 : : t_dynamic, t_no);
495 return true;
496 t_no:
497 return false;
498 t_dynamic:
499 return __static_cpu_has_safe(bit);
62122fd7 500#else
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501 u8 flag;
502 /* Open-coded due to __stringify() in ALTERNATIVE() */
503 asm volatile("1: movb $2,%0\n"
504 "2:\n"
505 ".section .altinstructions,\"a\"\n"
506 " .long 1b - .\n" /* src offset */
507 " .long 3f - .\n" /* repl offset */
508 " .word %P2\n" /* always replace */
509 " .byte 2b - 1b\n" /* source len */
510 " .byte 4f - 3f\n" /* replacement len */
511 ".previous\n"
512 ".section .discard,\"aw\",@progbits\n"
513 " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
514 ".previous\n"
515 ".section .altinstr_replacement,\"ax\"\n"
516 "3: movb $0,%0\n"
517 "4:\n"
518 ".previous\n"
519 ".section .altinstructions,\"a\"\n"
520 " .long 1b - .\n" /* src offset */
521 " .long 5f - .\n" /* repl offset */
522 " .word %P1\n" /* feature bit */
523 " .byte 4b - 3b\n" /* src len */
524 " .byte 6f - 5f\n" /* repl len */
525 ".previous\n"
526 ".section .discard,\"aw\",@progbits\n"
527 " .byte 0xff + (6f-5f) - (4b-3b)\n" /* size check */
528 ".previous\n"
529 ".section .altinstr_replacement,\"ax\"\n"
530 "5: movb $1,%0\n"
531 "6:\n"
532 ".previous\n"
533 : "=qm" (flag)
534 : "i" (bit), "i" (X86_FEATURE_ALWAYS));
535 return (flag == 2 ? __static_cpu_has_safe(bit) : flag);
62122fd7 536#endif /* CC_HAVE_ASM_GOTO */
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537}
538
539#define static_cpu_has_safe(bit) \
540( \
541 __builtin_constant_p(boot_cpu_has(bit)) ? \
542 boot_cpu_has(bit) : \
543 _static_cpu_has_safe(bit) \
544)
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545#else
546/*
547 * gcc 3.x is too stupid to do the static test; fall back to dynamic.
548 */
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549#define static_cpu_has(bit) boot_cpu_has(bit)
550#define static_cpu_has_safe(bit) boot_cpu_has(bit)
1ba4f22c 551#endif
a3c8acd0 552
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553#define cpu_has_bug(c, bit) cpu_has(c, (bit))
554#define set_cpu_bug(c, bit) set_cpu_cap(c, (bit))
555#define clear_cpu_bug(c, bit) clear_cpu_cap(c, (bit))
65fc985b 556
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557#define static_cpu_has_bug(bit) static_cpu_has((bit))
558#define static_cpu_has_bug_safe(bit) static_cpu_has_safe((bit))
559#define boot_cpu_has_bug(bit) cpu_has_bug(&boot_cpu_data, (bit))
65fc985b 560
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561#define MAX_CPU_FEATURES (NCAPINTS * 32)
562#define cpu_have_feature boot_cpu_has
2b9c1f03 563
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564#define CPU_FEATURE_TYPEFMT "x86,ven%04Xfam%04Xmod%04X"
565#define CPU_FEATURE_TYPEVAL boot_cpu_data.x86_vendor, boot_cpu_data.x86, \
566 boot_cpu_data.x86_model
2b9c1f03 567
fa1408e4 568#endif /* defined(__KERNEL__) && !defined(__ASSEMBLY__) */
1965aae3 569#endif /* _ASM_X86_CPUFEATURE_H */