x86/cpufeature: Enable new AVX-512 features

A few new AVX-512 instruction groups/features are added in cpufeatures.h
for enuermation: AVX512DQ, AVX512BW, and AVX512VL.

Clear the flags in fpu__xstate_clear_all_cpu_caps().

The specification for latest AVX-512 including the features can be found at:

  https://software.intel.com/sites/default/files/managed/07/b7/319433-023.pdf

Note, I didn't enable the flags in KVM. Hopefully the KVM guys can pick up
the flags and enable them in KVM.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Ravi V Shankar <ravi.v.shankar@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm@vger.kernel.org
Link: http://lkml.kernel.org/r/1457667498-37357-1-git-send-email-fenghua.yu@intel.com
[ Added more detailed feature descriptions. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index d11a3aaafd96bb609a7e9fa0cc9d49d57fb9dc4d..9e0567f4c081d9180886f51130b931e22f29a4d3 100644 (file)
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -220,6 +220,7 @@
 #define X86_FEATURE_CQM                ( 9*32+12) /* Cache QoS Monitoring */
 #define X86_FEATURE_MPX                ( 9*32+14) /* Memory Protection Extension */
 #define X86_FEATURE_AVX512F    ( 9*32+16) /* AVX-512 Foundation */
+#define X86_FEATURE_AVX512DQ   ( 9*32+17) /* AVX-512 DQ (Double/Quad granular) Instructions */
 #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 */
@@ -230,6 +231,8 @@
 #define X86_FEATURE_AVX512ER   ( 9*32+27) /* AVX-512 Exponential and Reciprocal */
 #define X86_FEATURE_AVX512CD   ( 9*32+28) /* AVX-512 Conflict Detection */
 #define X86_FEATURE_SHA_NI     ( 9*32+29) /* SHA1/SHA256 Instruction Extensions */
+#define X86_FEATURE_AVX512BW   ( 9*32+30) /* AVX-512 BW (Byte/Word granular) Instructions */
+#define X86_FEATURE_AVX512VL   ( 9*32+31) /* AVX-512 VL (128/256 Vector Length) Extensions */
 
 /* Extended state features, CPUID level 0x0000000d:1 (eax), word 10 */
 #define X86_FEATURE_XSAVEOPT   (10*32+ 0) /* XSAVEOPT */

diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index d425cda5ae6d0f1544c5d8decdb14d8682d7f7dd..6e8354f5a59353bd18801860980d779a19c61f74 100644 (file)
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -51,6 +51,9 @@ void fpu__xstate_clear_all_cpu_caps(void)
        setup_clear_cpu_cap(X86_FEATURE_AVX512PF);
        setup_clear_cpu_cap(X86_FEATURE_AVX512ER);
        setup_clear_cpu_cap(X86_FEATURE_AVX512CD);
+       setup_clear_cpu_cap(X86_FEATURE_AVX512DQ);
+       setup_clear_cpu_cap(X86_FEATURE_AVX512BW);
+       setup_clear_cpu_cap(X86_FEATURE_AVX512VL);
        setup_clear_cpu_cap(X86_FEATURE_MPX);
        setup_clear_cpu_cap(X86_FEATURE_XGETBV1);
 }