Commit-ID: a8d9df5a509a232a959e4ef2e281f7ecd77810d6 Gitweb: http://git.kernel.org/tip/a8d9df5a509a232a959e4ef2e281f7ecd77810d6 Author: Gayatri Kammela <[email protected]> AuthorDate: Wed, 16 Nov 2016 12:11:00 -0800 Committer: Thomas Gleixner <[email protected]> CommitDate: Thu, 17 Nov 2016 01:09:40 +0100
x86/cpufeatures: Enable new AVX512 cpu features Add a few new AVX512 instruction groups/features for enumeration in /proc/cpuinfo: AVX512IFMA and AVX512VBMI. Clear the flags in fpu_xstate_clear_all_cpu_caps(). CPUID.(EAX=7,ECX=0):EBX[bit 21] AVX512IFMA CPUID.(EAX=7,ECX=0):ECX[bit 1] AVX512VBMI Detailed information of cpuid bits for the features can be found at https://bugzilla.kernel.org/show_bug.cgi?id=187891 Signed-off-by: Gayatri Kammela <[email protected]> Reviewed-by: Borislav Petkov <[email protected]> Cc: Ravi Shankar <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]> --- arch/x86/include/asm/cpufeatures.h | 2 ++ arch/x86/kernel/fpu/xstate.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index a396292..a3e8cd7 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -226,6 +226,7 @@ #define X86_FEATURE_RDSEED ( 9*32+18) /* The RDSEED instruction */ #define X86_FEATURE_ADX ( 9*32+19) /* The ADCX and ADOX instructions */ #define X86_FEATURE_SMAP ( 9*32+20) /* Supervisor Mode Access Prevention */ +#define X86_FEATURE_AVX512IFMA ( 9*32+21) /* AVX-512 Integer Fused Multiply-Add instructions */ #define X86_FEATURE_CLFLUSHOPT ( 9*32+23) /* CLFLUSHOPT instruction */ #define X86_FEATURE_CLWB ( 9*32+24) /* CLWB instruction */ #define X86_FEATURE_AVX512PF ( 9*32+26) /* AVX-512 Prefetch */ @@ -279,6 +280,7 @@ #define X86_FEATURE_AVIC (15*32+13) /* Virtual Interrupt Controller */ /* Intel-defined CPU features, CPUID level 0x00000007:0 (ecx), word 16 */ +#define X86_FEATURE_AVX512VBMI (16*32+ 1) /* AVX512 Vector Bit Manipulation instructions*/ #define X86_FEATURE_PKU (16*32+ 3) /* Protection Keys for Userspace */ #define X86_FEATURE_OSPKE (16*32+ 4) /* OS Protection Keys Enable */ diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 095ef7d..ce47452 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -65,6 +65,7 @@ void fpu__xstate_clear_all_cpu_caps(void) setup_clear_cpu_cap(X86_FEATURE_AVX); setup_clear_cpu_cap(X86_FEATURE_AVX2); setup_clear_cpu_cap(X86_FEATURE_AVX512F); + setup_clear_cpu_cap(X86_FEATURE_AVX512IFMA); setup_clear_cpu_cap(X86_FEATURE_AVX512PF); setup_clear_cpu_cap(X86_FEATURE_AVX512ER); setup_clear_cpu_cap(X86_FEATURE_AVX512CD); @@ -73,6 +74,7 @@ void fpu__xstate_clear_all_cpu_caps(void) setup_clear_cpu_cap(X86_FEATURE_AVX512VL); setup_clear_cpu_cap(X86_FEATURE_MPX); setup_clear_cpu_cap(X86_FEATURE_XGETBV1); + setup_clear_cpu_cap(X86_FEATURE_AVX512VBMI); setup_clear_cpu_cap(X86_FEATURE_PKU); setup_clear_cpu_cap(X86_FEATURE_AVX512_4VNNIW); setup_clear_cpu_cap(X86_FEATURE_AVX512_4FMAPS);
