From: Aaron Lewis aaronlewis@google.com
[ Upstream commit cbb99c0f588737ec98c333558922ce47e9a95827 ]
Add the CPUID enumeration for Intel's de-feature bits to accommodate passing these de-features through to kvm guests.
These de-features are (from SDM vol 1, section 8.1.8): - X86_FEATURE_FDP_EXCPTN_ONLY: If CPUID.(EAX=07H,ECX=0H):EBX[bit 6] = 1, the data pointer (FDP) is updated only for the x87 non-control instructions that incur unmasked x87 exceptions. - X86_FEATURE_ZERO_FCS_FDS: If CPUID.(EAX=07H,ECX=0H):EBX[bit 13] = 1, the processor deprecates FCS and FDS; it saves each as 0000H.
Signed-off-by: Aaron Lewis aaronlewis@google.com Signed-off-by: Borislav Petkov bp@suse.de Reviewed-by: Jim Mattson jmattson@google.com Cc: Fenghua Yu fenghua.yu@intel.com Cc: Frederic Weisbecker frederic@kernel.org Cc: "H. Peter Anvin" hpa@zytor.com Cc: Ingo Molnar mingo@redhat.com Cc: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Cc: marcorr@google.com Cc: Peter Feiner pfeiner@google.com Cc: pshier@google.com Cc: Robert Hoo robert.hu@linux.intel.com Cc: Thomas Gleixner tglx@linutronix.de Cc: Thomas Lendacky Thomas.Lendacky@amd.com Cc: x86-ml x86@kernel.org Link: https://lkml.kernel.org/r/20190605220252.103406-1-aaronlewis@google.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/include/asm/cpufeatures.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 48ef9ed8226d..4cb8315c521f 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -239,12 +239,14 @@ #define X86_FEATURE_BMI1 ( 9*32+ 3) /* 1st group bit manipulation extensions */ #define X86_FEATURE_HLE ( 9*32+ 4) /* Hardware Lock Elision */ #define X86_FEATURE_AVX2 ( 9*32+ 5) /* AVX2 instructions */ +#define X86_FEATURE_FDP_EXCPTN_ONLY ( 9*32+ 6) /* "" FPU data pointer updated only on x87 exceptions */ #define X86_FEATURE_SMEP ( 9*32+ 7) /* Supervisor Mode Execution Protection */ #define X86_FEATURE_BMI2 ( 9*32+ 8) /* 2nd group bit manipulation extensions */ #define X86_FEATURE_ERMS ( 9*32+ 9) /* Enhanced REP MOVSB/STOSB instructions */ #define X86_FEATURE_INVPCID ( 9*32+10) /* Invalidate Processor Context ID */ #define X86_FEATURE_RTM ( 9*32+11) /* Restricted Transactional Memory */ #define X86_FEATURE_CQM ( 9*32+12) /* Cache QoS Monitoring */ +#define X86_FEATURE_ZERO_FCS_FDS ( 9*32+13) /* "" Zero out FPU CS and FPU DS */ #define X86_FEATURE_MPX ( 9*32+14) /* Memory Protection Extension */ #define X86_FEATURE_RDT_A ( 9*32+15) /* Resource Director Technology Allocation */ #define X86_FEATURE_AVX512F ( 9*32+16) /* AVX-512 Foundation */