Edit File: cpufeature.h
/* * Defines x86 CPU feature bits */ #ifndef _ASM_X86_CPUFEATURE_H #define _ASM_X86_CPUFEATURE_H #include <asm/processor.h> #if defined(__KERNEL__) && !defined(__ASSEMBLY__) #include <asm/asm.h> #include <linux/bitops.h> enum cpuid_leafs { CPUID_1_EDX = 0, CPUID_8000_0001_EDX, CPUID_8086_0001_EDX, CPUID_LNX_1, CPUID_1_ECX, CPUID_C000_0001_EDX, CPUID_8000_0001_ECX, CPUID_LNX_2, CPUID_LNX_3, CPUID_7_0_EBX, CPUID_D_1_EAX, CPUID_F_0_EDX, CPUID_F_1_EDX, CPUID_8000_0008_EBX, CPUID_6_EAX, CPUID_8000_000A_EDX, CPUID_7_ECX, CPUID_8000_0007_EBX, CPUID_7_EDX, }; 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 )) || \ (((bit)>>5)==10 && (1UL<<((bit)&31) & REQUIRED_MASK10)) || \ (((bit)>>5)==11 && (1UL<<((bit)&31) & REQUIRED_MASK11)) || \ (((bit)>>5)==12 && (1UL<<((bit)&31) & REQUIRED_MASK12)) || \ (((bit)>>5)==13 && (1UL<<((bit)&31) & REQUIRED_MASK13)) || \ (((bit)>>5)==14 && (1UL<<((bit)&31) & REQUIRED_MASK14)) || \ (((bit)>>5)==15 && (1UL<<((bit)&31) & REQUIRED_MASK15)) || \ (((bit)>>5)==16 && (1UL<<((bit)&31) & REQUIRED_MASK16)) || \ (((bit)>>5)==17 && (1UL<<((bit)&31) & REQUIRED_MASK17)) || \ (((bit)>>5)==18 && (1UL<<((bit)&31) & REQUIRED_MASK18)) ) #define DISABLED_MASK_BIT_SET(bit) \ ( (((bit)>>5)==0 && (1UL<<((bit)&31) & DISABLED_MASK0 )) || \ (((bit)>>5)==1 && (1UL<<((bit)&31) & DISABLED_MASK1 )) || \ (((bit)>>5)==2 && (1UL<<((bit)&31) & DISABLED_MASK2 )) || \ (((bit)>>5)==3 && (1UL<<((bit)&31) & DISABLED_MASK3 )) || \ (((bit)>>5)==4 && (1UL<<((bit)&31) & DISABLED_MASK4 )) || \ (((bit)>>5)==5 && (1UL<<((bit)&31) & DISABLED_MASK5 )) || \ (((bit)>>5)==6 && (1UL<<((bit)&31) & DISABLED_MASK6 )) || \ (((bit)>>5)==7 && (1UL<<((bit)&31) & DISABLED_MASK7 )) || \ (((bit)>>5)==8 && (1UL<<((bit)&31) & DISABLED_MASK8 )) || \ (((bit)>>5)==9 && (1UL<<((bit)&31) & DISABLED_MASK9 )) || \ (((bit)>>5)==10 && (1UL<<((bit)&31) & DISABLED_MASK10)) || \ (((bit)>>5)==11 && (1UL<<((bit)&31) & DISABLED_MASK11)) || \ (((bit)>>5)==12 && (1UL<<((bit)&31) & DISABLED_MASK12)) || \ (((bit)>>5)==13 && (1UL<<((bit)&31) & DISABLED_MASK13)) || \ (((bit)>>5)==14 && (1UL<<((bit)&31) & DISABLED_MASK14)) || \ (((bit)>>5)==15 && (1UL<<((bit)&31) & DISABLED_MASK15)) || \ (((bit)>>5)==16 && (1UL<<((bit)&31) & DISABLED_MASK16)) || \ (((bit)>>5)==17 && (1UL<<((bit)&31) & DISABLED_MASK17)) || \ (((bit)>>5)==18 && (1UL<<((bit)&31) & DISABLED_MASK18)) ) #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)) /* * This macro is for detection of features which need kernel * infrastructure to be used. It may *not* directly test the CPU * itself. Use the cpu_has() family if you want true runtime * testing of CPU features, like in hypervisor code where you are * supporting a possible guest feature where host support for it * is not relevant. */ #define cpu_feature_enabled(bit) \ (__builtin_constant_p(bit) && DISABLED_MASK_BIT_SET(bit) ? 0 : \ cpu_has(&boot_cpu_data, bit)) #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)) extern void setup_clear_cpu_cap(unsigned int bit); extern void clear_cpu_cap(struct cpuinfo_x86 *c, unsigned int bit); #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 setup_force_cpu_bug(bit) setup_force_cpu_cap(bit) #define cpu_has_fpu boot_cpu_has(X86_FEATURE_FPU) #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_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_ssse3 boot_cpu_has(X86_FEATURE_SSSE3) #define cpu_has_aes boot_cpu_has(X86_FEATURE_AES) #define cpu_has_avx boot_cpu_has(X86_FEATURE_AVX) #define cpu_has_avx2 boot_cpu_has(X86_FEATURE_AVX2) #define cpu_has_ht boot_cpu_has(X86_FEATURE_HT) #define cpu_has_nx boot_cpu_has(X86_FEATURE_NX) #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_CLFLUSH) #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_xsaveopt boot_cpu_has(X86_FEATURE_XSAVEOPT) #define cpu_has_xsaves boot_cpu_has(X86_FEATURE_XSAVES) #define cpu_has_osxsave boot_cpu_has(X86_FEATURE_OSXSAVE) #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_perfctr_nb boot_cpu_has(X86_FEATURE_PERFCTR_NB) #define cpu_has_perfctr_l2 boot_cpu_has(X86_FEATURE_PERFCTR_L2) #define cpu_has_cx8 boot_cpu_has(X86_FEATURE_CX8) #define cpu_has_cx16 boot_cpu_has(X86_FEATURE_CX16) #define cpu_has_eager_fpu boot_cpu_has(X86_FEATURE_EAGER_FPU) #define cpu_has_topoext boot_cpu_has(X86_FEATURE_TOPOEXT) #define cpu_has_bpext boot_cpu_has(X86_FEATURE_BPEXT) #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_volatile_goto("1: jmp %l[t_no]\n" "2:\n" ".section .altinstructions,\"a\"\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" " .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 #define cpu_has_bug(c, bit) cpu_has(c, (bit)) #define set_cpu_bug(c, bit) set_cpu_cap(c, (bit)) #define clear_cpu_bug(c, bit) clear_cpu_cap(c, (bit)); #define static_cpu_has_bug(bit) static_cpu_has((bit)) #define boot_cpu_has_bug(bit) cpu_has_bug(&boot_cpu_data, (bit)) #endif /* defined(__KERNEL__) && !defined(__ASSEMBLY__) */ #endif /* _ASM_X86_CPUFEATURE_H */