| /* |
| * Defines x86 CPU feature bits |
| */ |
| #ifndef _ASM_X86_CPUFEATURE_H |
| #define _ASM_X86_CPUFEATURE_H |
| |
| #include <asm/required-features.h> |
| |
| #define NCAPINTS 10 /* N 32-bit words worth of info */ |
| |
| /* |
| * Note: If the comment begins with a quoted string, that string is used |
| * in /proc/cpuinfo instead of the macro name. If the string is "", |
| * this feature bit is not displayed in /proc/cpuinfo at all. |
| */ |
| |
| /* Intel-defined CPU features, CPUID level 0x00000001 (edx), word 0 */ |
| #define X86_FEATURE_FPU (0*32+ 0) /* Onboard FPU */ |
| #define X86_FEATURE_VME (0*32+ 1) /* Virtual Mode Extensions */ |
| #define X86_FEATURE_DE (0*32+ 2) /* Debugging Extensions */ |
| #define X86_FEATURE_PSE (0*32+ 3) /* Page Size Extensions */ |
| #define X86_FEATURE_TSC (0*32+ 4) /* Time Stamp Counter */ |
| #define X86_FEATURE_MSR (0*32+ 5) /* Model-Specific Registers */ |
| #define X86_FEATURE_PAE (0*32+ 6) /* Physical Address Extensions */ |
| #define X86_FEATURE_MCE (0*32+ 7) /* Machine Check Exception */ |
| #define X86_FEATURE_CX8 (0*32+ 8) /* CMPXCHG8 instruction */ |
| #define X86_FEATURE_APIC (0*32+ 9) /* Onboard APIC */ |
| #define X86_FEATURE_SEP (0*32+11) /* SYSENTER/SYSEXIT */ |
| #define X86_FEATURE_MTRR (0*32+12) /* Memory Type Range Registers */ |
| #define X86_FEATURE_PGE (0*32+13) /* Page Global Enable */ |
| #define X86_FEATURE_MCA (0*32+14) /* Machine Check Architecture */ |
| #define X86_FEATURE_CMOV (0*32+15) /* CMOV instructions */ |
| /* (plus FCMOVcc, FCOMI with FPU) */ |
| #define X86_FEATURE_PAT (0*32+16) /* Page Attribute Table */ |
| #define X86_FEATURE_PSE36 (0*32+17) /* 36-bit PSEs */ |
| #define X86_FEATURE_PN (0*32+18) /* Processor serial number */ |
| #define X86_FEATURE_CLFLSH (0*32+19) /* "clflush" CLFLUSH instruction */ |
| #define X86_FEATURE_DS (0*32+21) /* "dts" Debug Store */ |
| #define X86_FEATURE_ACPI (0*32+22) /* ACPI via MSR */ |
| #define X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */ |
| #define X86_FEATURE_FXSR (0*32+24) /* FXSAVE/FXRSTOR, CR4.OSFXSR */ |
| #define X86_FEATURE_XMM (0*32+25) /* "sse" */ |
| #define X86_FEATURE_XMM2 (0*32+26) /* "sse2" */ |
| #define X86_FEATURE_SELFSNOOP (0*32+27) /* "ss" CPU self snoop */ |
| #define X86_FEATURE_HT (0*32+28) /* Hyper-Threading */ |
| #define X86_FEATURE_ACC (0*32+29) /* "tm" Automatic clock control */ |
| #define X86_FEATURE_IA64 (0*32+30) /* IA-64 processor */ |
| #define X86_FEATURE_PBE (0*32+31) /* Pending Break Enable */ |
| |
| /* AMD-defined CPU features, CPUID level 0x80000001, word 1 */ |
| /* Don't duplicate feature flags which are redundant with Intel! */ |
| #define X86_FEATURE_SYSCALL (1*32+11) /* SYSCALL/SYSRET */ |
| #define X86_FEATURE_MP (1*32+19) /* MP Capable. */ |
| #define X86_FEATURE_NX (1*32+20) /* Execute Disable */ |
| #define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */ |
| #define X86_FEATURE_FXSR_OPT (1*32+25) /* FXSAVE/FXRSTOR optimizations */ |
| #define X86_FEATURE_GBPAGES (1*32+26) /* "pdpe1gb" GB pages */ |
| #define X86_FEATURE_RDTSCP (1*32+27) /* RDTSCP */ |
| #define X86_FEATURE_LM (1*32+29) /* Long Mode (x86-64) */ |
| #define X86_FEATURE_3DNOWEXT (1*32+30) /* AMD 3DNow! extensions */ |
| #define X86_FEATURE_3DNOW (1*32+31) /* 3DNow! */ |
| |
| /* Transmeta-defined CPU features, CPUID level 0x80860001, word 2 */ |
| #define X86_FEATURE_RECOVERY (2*32+ 0) /* CPU in recovery mode */ |
| #define X86_FEATURE_LONGRUN (2*32+ 1) /* Longrun power control */ |
| #define X86_FEATURE_LRTI (2*32+ 3) /* LongRun table interface */ |
| |
| /* Other features, Linux-defined mapping, word 3 */ |
| /* This range is used for feature bits which conflict or are synthesized */ |
| #define X86_FEATURE_CXMMX (3*32+ 0) /* Cyrix MMX extensions */ |
| #define X86_FEATURE_K6_MTRR (3*32+ 1) /* AMD K6 nonstandard MTRRs */ |
| #define X86_FEATURE_CYRIX_ARR (3*32+ 2) /* Cyrix ARRs (= MTRRs) */ |
| #define X86_FEATURE_CENTAUR_MCR (3*32+ 3) /* Centaur MCRs (= MTRRs) */ |
| /* cpu types for specific tunings: */ |
| #define X86_FEATURE_K8 (3*32+ 4) /* "" Opteron, Athlon64 */ |
| #define X86_FEATURE_K7 (3*32+ 5) /* "" Athlon */ |
| #define X86_FEATURE_P3 (3*32+ 6) /* "" P3 */ |
| #define X86_FEATURE_P4 (3*32+ 7) /* "" P4 */ |
| #define X86_FEATURE_CONSTANT_TSC (3*32+ 8) /* TSC ticks at a constant rate */ |
| #define X86_FEATURE_UP (3*32+ 9) /* smp kernel running on up */ |
| #define X86_FEATURE_FXSAVE_LEAK (3*32+10) /* "" FXSAVE leaks FOP/FIP/FOP */ |
| #define X86_FEATURE_ARCH_PERFMON (3*32+11) /* Intel Architectural PerfMon */ |
| #define X86_FEATURE_PEBS (3*32+12) /* Precise-Event Based Sampling */ |
| #define X86_FEATURE_BTS (3*32+13) /* Branch Trace Store */ |
| #define X86_FEATURE_SYSCALL32 (3*32+14) /* "" syscall in ia32 userspace */ |
| #define X86_FEATURE_SYSENTER32 (3*32+15) /* "" sysenter in ia32 userspace */ |
| #define X86_FEATURE_REP_GOOD (3*32+16) /* rep microcode works well */ |
| #define X86_FEATURE_MFENCE_RDTSC (3*32+17) /* "" Mfence synchronizes RDTSC */ |
| #define X86_FEATURE_LFENCE_RDTSC (3*32+18) /* "" Lfence synchronizes RDTSC */ |
| #define X86_FEATURE_11AP (3*32+19) /* "" Bad local APIC aka 11AP */ |
| #define X86_FEATURE_NOPL (3*32+20) /* The NOPL (0F 1F) instructions */ |
| /* 21 available, was AMD_C1E */ |
| #define X86_FEATURE_XTOPOLOGY (3*32+22) /* cpu topology enum extensions */ |
| #define X86_FEATURE_TSC_RELIABLE (3*32+23) /* TSC is known to be reliable */ |
| #define X86_FEATURE_NONSTOP_TSC (3*32+24) /* TSC does not stop in C states */ |
| #define X86_FEATURE_CLFLUSH_MONITOR (3*32+25) /* "" clflush reqd with monitor */ |
| #define X86_FEATURE_EXTD_APICID (3*32+26) /* has extended APICID (8 bits) */ |
| #define X86_FEATURE_AMD_DCM (3*32+27) /* multi-node processor */ |
| #define X86_FEATURE_APERFMPERF (3*32+28) /* APERFMPERF */ |
| |
| /* Intel-defined CPU features, CPUID level 0x00000001 (ecx), word 4 */ |
| #define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */ |
| #define X86_FEATURE_PCLMULQDQ (4*32+ 1) /* PCLMULQDQ instruction */ |
| #define X86_FEATURE_DTES64 (4*32+ 2) /* 64-bit Debug Store */ |
| #define X86_FEATURE_MWAIT (4*32+ 3) /* "monitor" Monitor/Mwait support */ |
| #define X86_FEATURE_DSCPL (4*32+ 4) /* "ds_cpl" CPL Qual. Debug Store */ |
| #define X86_FEATURE_VMX (4*32+ 5) /* Hardware virtualization */ |
| #define X86_FEATURE_SMX (4*32+ 6) /* Safer mode */ |
| #define X86_FEATURE_EST (4*32+ 7) /* Enhanced SpeedStep */ |
| #define X86_FEATURE_TM2 (4*32+ 8) /* Thermal Monitor 2 */ |
| #define X86_FEATURE_SSSE3 (4*32+ 9) /* Supplemental SSE-3 */ |
| #define X86_FEATURE_CID (4*32+10) /* Context ID */ |
| #define X86_FEATURE_FMA (4*32+12) /* Fused multiply-add */ |
| #define X86_FEATURE_CX16 (4*32+13) /* CMPXCHG16B */ |
| #define X86_FEATURE_XTPR (4*32+14) /* Send Task Priority Messages */ |
| #define X86_FEATURE_PDCM (4*32+15) /* Performance Capabilities */ |
| #define X86_FEATURE_DCA (4*32+18) /* Direct Cache Access */ |
| #define X86_FEATURE_XMM4_1 (4*32+19) /* "sse4_1" SSE-4.1 */ |
| #define X86_FEATURE_XMM4_2 (4*32+20) /* "sse4_2" SSE-4.2 */ |
| #define X86_FEATURE_X2APIC (4*32+21) /* x2APIC */ |
| #define X86_FEATURE_MOVBE (4*32+22) /* MOVBE instruction */ |
| #define X86_FEATURE_POPCNT (4*32+23) /* POPCNT instruction */ |
| #define X86_FEATURE_AES (4*32+25) /* AES instructions */ |
| #define X86_FEATURE_XSAVE (4*32+26) /* XSAVE/XRSTOR/XSETBV/XGETBV */ |
| #define X86_FEATURE_OSXSAVE (4*32+27) /* "" XSAVE enabled in the OS */ |
| #define X86_FEATURE_AVX (4*32+28) /* Advanced Vector Extensions */ |
| #define X86_FEATURE_F16C (4*32+29) /* 16-bit fp conversions */ |
| #define X86_FEATURE_RDRAND (4*32+30) /* The RDRAND instruction */ |
| #define X86_FEATURE_HYPERVISOR (4*32+31) /* Running on a hypervisor */ |
| |
| /* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */ |
| #define X86_FEATURE_XSTORE (5*32+ 2) /* "rng" RNG present (xstore) */ |
| #define X86_FEATURE_XSTORE_EN (5*32+ 3) /* "rng_en" RNG enabled */ |
| #define X86_FEATURE_XCRYPT (5*32+ 6) /* "ace" on-CPU crypto (xcrypt) */ |
| #define X86_FEATURE_XCRYPT_EN (5*32+ 7) /* "ace_en" on-CPU crypto enabled */ |
| #define X86_FEATURE_ACE2 (5*32+ 8) /* Advanced Cryptography Engine v2 */ |
| #define X86_FEATURE_ACE2_EN (5*32+ 9) /* ACE v2 enabled */ |
| #define X86_FEATURE_PHE (5*32+10) /* PadLock Hash Engine */ |
| #define X86_FEATURE_PHE_EN (5*32+11) /* PHE enabled */ |
| #define X86_FEATURE_PMM (5*32+12) /* PadLock Montgomery Multiplier */ |
| #define X86_FEATURE_PMM_EN (5*32+13) /* PMM enabled */ |
| |
| /* More extended AMD flags: CPUID level 0x80000001, ecx, word 6 */ |
| #define X86_FEATURE_LAHF_LM (6*32+ 0) /* LAHF/SAHF in long mode */ |
| #define X86_FEATURE_CMP_LEGACY (6*32+ 1) /* If yes HyperThreading not valid */ |
| #define X86_FEATURE_SVM (6*32+ 2) /* Secure virtual machine */ |
| #define X86_FEATURE_EXTAPIC (6*32+ 3) /* Extended APIC space */ |
| #define X86_FEATURE_CR8_LEGACY (6*32+ 4) /* CR8 in 32-bit mode */ |
| #define X86_FEATURE_ABM (6*32+ 5) /* Advanced bit manipulation */ |
| #define X86_FEATURE_SSE4A (6*32+ 6) /* SSE-4A */ |
| #define X86_FEATURE_MISALIGNSSE (6*32+ 7) /* Misaligned SSE mode */ |
| #define X86_FEATURE_3DNOWPREFETCH (6*32+ 8) /* 3DNow prefetch instructions */ |
| #define X86_FEATURE_OSVW (6*32+ 9) /* OS Visible Workaround */ |
| #define X86_FEATURE_IBS (6*32+10) /* Instruction Based Sampling */ |
| #define X86_FEATURE_XOP (6*32+11) /* extended AVX instructions */ |
| #define X86_FEATURE_SKINIT (6*32+12) /* SKINIT/STGI instructions */ |
| #define X86_FEATURE_WDT (6*32+13) /* Watchdog timer */ |
| #define X86_FEATURE_LWP (6*32+15) /* Light Weight Profiling */ |
| #define X86_FEATURE_FMA4 (6*32+16) /* 4 operands MAC instructions */ |
| #define X86_FEATURE_NODEID_MSR (6*32+19) /* NodeId MSR */ |
| #define X86_FEATURE_TBM (6*32+21) /* trailing bit manipulations */ |
| #define X86_FEATURE_TOPOEXT (6*32+22) /* topology extensions CPUID leafs */ |
| #define X86_FEATURE_PERFCTR_CORE (6*32+23) /* core performance counter extensions */ |
| |
| /* |
| * Auxiliary flags: Linux defined - For features scattered in various |
| * CPUID levels like 0x6, 0xA etc, word 7 |
| */ |
| #define X86_FEATURE_IDA (7*32+ 0) /* Intel Dynamic Acceleration */ |
| #define X86_FEATURE_ARAT (7*32+ 1) /* Always Running APIC Timer */ |
| #define X86_FEATURE_CPB (7*32+ 2) /* AMD Core Performance Boost */ |
| #define X86_FEATURE_EPB (7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */ |
| #define X86_FEATURE_XSAVEOPT (7*32+ 4) /* Optimized Xsave */ |
| #define X86_FEATURE_PLN (7*32+ 5) /* Intel Power Limit Notification */ |
| #define X86_FEATURE_PTS (7*32+ 6) /* Intel Package Thermal Status */ |
| #define X86_FEATURE_DTS (7*32+ 7) /* Digital Thermal Sensor */ |
| |
| /* Virtualization flags: Linux defined, word 8 */ |
| #define X86_FEATURE_TPR_SHADOW (8*32+ 0) /* Intel TPR Shadow */ |
| #define X86_FEATURE_VNMI (8*32+ 1) /* Intel Virtual NMI */ |
| #define X86_FEATURE_FLEXPRIORITY (8*32+ 2) /* Intel FlexPriority */ |
| #define X86_FEATURE_EPT (8*32+ 3) /* Intel Extended Page Table */ |
| #define X86_FEATURE_VPID (8*32+ 4) /* Intel Virtual Processor ID */ |
| #define X86_FEATURE_NPT (8*32+ 5) /* AMD Nested Page Table support */ |
| #define X86_FEATURE_LBRV (8*32+ 6) /* AMD LBR Virtualization support */ |
| #define X86_FEATURE_SVML (8*32+ 7) /* "svm_lock" AMD SVM locking MSR */ |
| #define X86_FEATURE_NRIPS (8*32+ 8) /* "nrip_save" AMD SVM next_rip save */ |
| #define X86_FEATURE_TSCRATEMSR (8*32+ 9) /* "tsc_scale" AMD TSC scaling support */ |
| #define X86_FEATURE_VMCBCLEAN (8*32+10) /* "vmcb_clean" AMD VMCB clean bits support */ |
| #define X86_FEATURE_FLUSHBYASID (8*32+11) /* AMD flush-by-ASID support */ |
| #define X86_FEATURE_DECODEASSISTS (8*32+12) /* AMD Decode Assists support */ |
| #define X86_FEATURE_PAUSEFILTER (8*32+13) /* AMD filtered pause intercept */ |
| #define X86_FEATURE_PFTHRESHOLD (8*32+14) /* AMD pause filter threshold */ |
| |
| |
| /* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx), word 9 */ |
| #define X86_FEATURE_FSGSBASE (9*32+ 0) /* {RD/WR}{FS/GS}BASE instructions*/ |
| #define X86_FEATURE_SMEP (9*32+ 7) /* Supervisor Mode Execution Protection */ |
| #define X86_FEATURE_ERMS (9*32+ 9) /* Enhanced REP MOVSB/STOSB */ |
| |
| #if defined(__KERNEL__) && !defined(__ASSEMBLY__) |
| |
| #include <asm/asm.h> |
| #include <linux/bitops.h> |
| |
| extern const char * const x86_cap_flags[NCAPINTS*32]; |
| extern const char * const x86_power_flags[32]; |
| |
| #define test_cpu_cap(c, bit) \ |
| test_bit(bit, (unsigned long *)((c)->x86_capability)) |
| |
| #define REQUIRED_MASK_BIT_SET(bit) \ |
| ( (((bit)>>5)==0 && (1UL<<((bit)&31) & REQUIRED_MASK0)) || \ |
| (((bit)>>5)==1 && (1UL<<((bit)&31) & REQUIRED_MASK1)) || \ |
| (((bit)>>5)==2 && (1UL<<((bit)&31) & REQUIRED_MASK2)) || \ |
| (((bit)>>5)==3 && (1UL<<((bit)&31) & REQUIRED_MASK3)) || \ |
| (((bit)>>5)==4 && (1UL<<((bit)&31) & REQUIRED_MASK4)) || \ |
| (((bit)>>5)==5 && (1UL<<((bit)&31) & REQUIRED_MASK5)) || \ |
| (((bit)>>5)==6 && (1UL<<((bit)&31) & REQUIRED_MASK6)) || \ |
| (((bit)>>5)==7 && (1UL<<((bit)&31) & REQUIRED_MASK7)) || \ |
| (((bit)>>5)==8 && (1UL<<((bit)&31) & REQUIRED_MASK8)) || \ |
| (((bit)>>5)==9 && (1UL<<((bit)&31) & REQUIRED_MASK9)) ) |
| |
| #define cpu_has(c, bit) \ |
| (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \ |
| test_cpu_cap(c, bit)) |
| |
| #define this_cpu_has(bit) \ |
| (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \ |
| x86_this_cpu_test_bit(bit, (unsigned long *)&cpu_info.x86_capability)) |
| |
| #define boot_cpu_has(bit) cpu_has(&boot_cpu_data, bit) |
| |
| #define set_cpu_cap(c, bit) set_bit(bit, (unsigned long *)((c)->x86_capability)) |
| #define clear_cpu_cap(c, bit) clear_bit(bit, (unsigned long *)((c)->x86_capability)) |
| #define setup_clear_cpu_cap(bit) do { \ |
| clear_cpu_cap(&boot_cpu_data, bit); \ |
| set_bit(bit, (unsigned long *)cpu_caps_cleared); \ |
| } while (0) |
| #define setup_force_cpu_cap(bit) do { \ |
| set_cpu_cap(&boot_cpu_data, bit); \ |
| set_bit(bit, (unsigned long *)cpu_caps_set); \ |
| } while (0) |
| |
| #define cpu_has_fpu boot_cpu_has(X86_FEATURE_FPU) |
| #define cpu_has_vme boot_cpu_has(X86_FEATURE_VME) |
| #define cpu_has_de boot_cpu_has(X86_FEATURE_DE) |
| #define cpu_has_pse boot_cpu_has(X86_FEATURE_PSE) |
| #define cpu_has_tsc boot_cpu_has(X86_FEATURE_TSC) |
| #define cpu_has_pae boot_cpu_has(X86_FEATURE_PAE) |
| #define cpu_has_pge boot_cpu_has(X86_FEATURE_PGE) |
| #define cpu_has_apic boot_cpu_has(X86_FEATURE_APIC) |
| #define cpu_has_sep boot_cpu_has(X86_FEATURE_SEP) |
| #define cpu_has_mtrr boot_cpu_has(X86_FEATURE_MTRR) |
| #define cpu_has_mmx boot_cpu_has(X86_FEATURE_MMX) |
| #define cpu_has_fxsr boot_cpu_has(X86_FEATURE_FXSR) |
| #define cpu_has_xmm boot_cpu_has(X86_FEATURE_XMM) |
| #define cpu_has_xmm2 boot_cpu_has(X86_FEATURE_XMM2) |
| #define cpu_has_xmm3 boot_cpu_has(X86_FEATURE_XMM3) |
| #define cpu_has_aes boot_cpu_has(X86_FEATURE_AES) |
| #define cpu_has_ht boot_cpu_has(X86_FEATURE_HT) |
| #define cpu_has_mp boot_cpu_has(X86_FEATURE_MP) |
| #define cpu_has_nx boot_cpu_has(X86_FEATURE_NX) |
| #define cpu_has_k6_mtrr boot_cpu_has(X86_FEATURE_K6_MTRR) |
| #define cpu_has_cyrix_arr boot_cpu_has(X86_FEATURE_CYRIX_ARR) |
| #define cpu_has_centaur_mcr boot_cpu_has(X86_FEATURE_CENTAUR_MCR) |
| #define cpu_has_xstore boot_cpu_has(X86_FEATURE_XSTORE) |
| #define cpu_has_xstore_enabled boot_cpu_has(X86_FEATURE_XSTORE_EN) |
| #define cpu_has_xcrypt boot_cpu_has(X86_FEATURE_XCRYPT) |
| #define cpu_has_xcrypt_enabled boot_cpu_has(X86_FEATURE_XCRYPT_EN) |
| #define cpu_has_ace2 boot_cpu_has(X86_FEATURE_ACE2) |
| #define cpu_has_ace2_enabled boot_cpu_has(X86_FEATURE_ACE2_EN) |
| #define cpu_has_phe boot_cpu_has(X86_FEATURE_PHE) |
| #define cpu_has_phe_enabled boot_cpu_has(X86_FEATURE_PHE_EN) |
| #define cpu_has_pmm boot_cpu_has(X86_FEATURE_PMM) |
| #define cpu_has_pmm_enabled boot_cpu_has(X86_FEATURE_PMM_EN) |
| #define cpu_has_ds boot_cpu_has(X86_FEATURE_DS) |
| #define cpu_has_pebs boot_cpu_has(X86_FEATURE_PEBS) |
| #define cpu_has_clflush boot_cpu_has(X86_FEATURE_CLFLSH) |
| #define cpu_has_bts boot_cpu_has(X86_FEATURE_BTS) |
| #define cpu_has_gbpages boot_cpu_has(X86_FEATURE_GBPAGES) |
| #define cpu_has_arch_perfmon boot_cpu_has(X86_FEATURE_ARCH_PERFMON) |
| #define cpu_has_pat boot_cpu_has(X86_FEATURE_PAT) |
| #define cpu_has_xmm4_1 boot_cpu_has(X86_FEATURE_XMM4_1) |
| #define cpu_has_xmm4_2 boot_cpu_has(X86_FEATURE_XMM4_2) |
| #define cpu_has_x2apic boot_cpu_has(X86_FEATURE_X2APIC) |
| #define cpu_has_xsave boot_cpu_has(X86_FEATURE_XSAVE) |
| #define cpu_has_hypervisor boot_cpu_has(X86_FEATURE_HYPERVISOR) |
| #define cpu_has_pclmulqdq boot_cpu_has(X86_FEATURE_PCLMULQDQ) |
| #define cpu_has_perfctr_core boot_cpu_has(X86_FEATURE_PERFCTR_CORE) |
| #define cpu_has_cx8 boot_cpu_has(X86_FEATURE_CX8) |
| #define cpu_has_cx16 boot_cpu_has(X86_FEATURE_CX16) |
| |
| #if defined(CONFIG_X86_INVLPG) || defined(CONFIG_X86_64) |
| # define cpu_has_invlpg 1 |
| #else |
| # define cpu_has_invlpg (boot_cpu_data.x86 > 3) |
| #endif |
| |
| #ifdef CONFIG_X86_64 |
| |
| #undef cpu_has_vme |
| #define cpu_has_vme 0 |
| |
| #undef cpu_has_pae |
| #define cpu_has_pae ___BUG___ |
| |
| #undef cpu_has_mp |
| #define cpu_has_mp 1 |
| |
| #undef cpu_has_k6_mtrr |
| #define cpu_has_k6_mtrr 0 |
| |
| #undef cpu_has_cyrix_arr |
| #define cpu_has_cyrix_arr 0 |
| |
| #undef cpu_has_centaur_mcr |
| #define cpu_has_centaur_mcr 0 |
| |
| #endif /* CONFIG_X86_64 */ |
| |
| #if __GNUC__ >= 4 |
| /* |
| * Static testing of CPU features. Used the same as boot_cpu_has(). |
| * These are only valid after alternatives have run, but will statically |
| * patch the target code for additional performance. |
| * |
| */ |
| static __always_inline __pure bool __static_cpu_has(u16 bit) |
| { |
| #if __GNUC__ > 4 || __GNUC_MINOR__ >= 5 |
| asm goto("1: jmp %l[t_no]\n" |
| "2:\n" |
| ".section .altinstructions,\"a\"\n" |
| _ASM_ALIGN "\n" |
| " .long 1b - .\n" |
| " .long 0\n" /* no replacement */ |
| " .word %P0\n" /* feature bit */ |
| " .byte 2b - 1b\n" /* source len */ |
| " .byte 0\n" /* replacement len */ |
| ".previous\n" |
| /* skipping size check since replacement size = 0 */ |
| : : "i" (bit) : : t_no); |
| return true; |
| t_no: |
| return false; |
| #else |
| u8 flag; |
| /* Open-coded due to __stringify() in ALTERNATIVE() */ |
| asm volatile("1: movb $0,%0\n" |
| "2:\n" |
| ".section .altinstructions,\"a\"\n" |
| _ASM_ALIGN "\n" |
| " .long 1b - .\n" |
| " .long 3f - .\n" |
| " .word %P1\n" /* feature bit */ |
| " .byte 2b - 1b\n" /* source len */ |
| " .byte 4f - 3f\n" /* replacement len */ |
| ".previous\n" |
| ".section .discard,\"aw\",@progbits\n" |
| " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */ |
| ".previous\n" |
| ".section .altinstr_replacement,\"ax\"\n" |
| "3: movb $1,%0\n" |
| "4:\n" |
| ".previous\n" |
| : "=qm" (flag) : "i" (bit)); |
| return flag; |
| #endif |
| } |
| |
| #define static_cpu_has(bit) \ |
| ( \ |
| __builtin_constant_p(boot_cpu_has(bit)) ? \ |
| boot_cpu_has(bit) : \ |
| __builtin_constant_p(bit) ? \ |
| __static_cpu_has(bit) : \ |
| boot_cpu_has(bit) \ |
| ) |
| #else |
| /* |
| * gcc 3.x is too stupid to do the static test; fall back to dynamic. |
| */ |
| #define static_cpu_has(bit) boot_cpu_has(bit) |
| #endif |
| |
| #endif /* defined(__KERNEL__) && !defined(__ASSEMBLY__) */ |
| |
| #endif /* _ASM_X86_CPUFEATURE_H */ |
