diff options
| author | Xiao Guangrong <guangrong.xiao@linux.intel.com> | 2015-09-09 14:05:51 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-10-01 15:06:35 +0200 |
| commit | 8b3e34e46aca9b6d349b331cd9cf71ccbdc91b2e (patch) | |
| tree | e908c0be3a3ea4649fc767df6ad03306e9116edf /arch/x86/kvm/cpuid.c | |
| parent | eb1c31b46800a476644cd63ab3bc7ef918b0a917 (diff) | |
| download | linux-8b3e34e46aca9b6d349b331cd9cf71ccbdc91b2e.tar.bz2 | |
KVM: x86: add pcommit support
Pass PCOMMIT CPU feature to guest to enable PCOMMIT instruction
Currently we do not catch pcommit instruction for L1 guest and
allow L1 to catch this instruction for L2 if, as required by the spec,
L1 can enumerate the PCOMMIT instruction via CPUID:
| IA32_VMX_PROCBASED_CTLS2[53] (which enumerates support for the
| 1-setting of PCOMMIT exiting) is always the same as
| CPUID.07H:EBX.PCOMMIT[bit 22]. Thus, software can set PCOMMIT exiting
| to 1 if and only if the PCOMMIT instruction is enumerated via CPUID
The spec can be found at
https://software.intel.com/sites/default/files/managed/0d/53/319433-022.pdf
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/cpuid.c')
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 962fc7d7e0d4..faeb0b3bb343 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -348,7 +348,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, F(FSGSBASE) | F(BMI1) | F(HLE) | F(AVX2) | F(SMEP) | F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | f_mpx | F(RDSEED) | F(ADX) | F(SMAP) | F(AVX512F) | F(AVX512PF) | F(AVX512ER) | - F(AVX512CD) | F(CLFLUSHOPT) | F(CLWB); + F(AVX512CD) | F(CLFLUSHOPT) | F(CLWB) | F(PCOMMIT); /* cpuid 0xD.1.eax */ const u32 kvm_supported_word10_x86_features = |