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| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2020-03-02 15:56:42 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-03-16 17:58:24 +0100 |
| commit | 9b58b9857f221e4f7149a22727ef61d0c141f56b (patch) | |
| tree | a250c6749a7a82e92d8595c021e08f84d224245d /arch/x86/kvm/cpuid.c | |
| parent | 66a6950f99950c77e2898e48d668eca1dac10a1e (diff) | |
| download | linux-9b58b9857f221e4f7149a22727ef61d0c141f56b.tar.bz2 | |
KVM: SVM: Convert feature updates from CPUID to KVM cpu caps
Use the recently introduced KVM CPU caps to propagate SVM-only (kernel)
settings to supported CPUID flags.
Note, there are a few subtleties:
- Setting a flag based on a *different* feature is effectively
emulation, and must be done at runtime via ->set_supported_cpuid().
- CPUID 0x8000000A.EDX is a feature leaf that was previously not
adjusted by kvm_cpu_cap_mask() because all features are hidden by
default.
Opportunistically add a technically unnecessary break and fix an
indentation issue in svm_set_supported_cpuid().
No functional change intended.
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@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 | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 31ea934d9b49..a5aed82d9ffa 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -370,6 +370,12 @@ void kvm_set_cpu_caps(void) F(AMD_SSB_NO) | F(AMD_STIBP) | F(AMD_STIBP_ALWAYS_ON) ); + /* + * Hide all SVM features by default, SVM will set the cap bits for + * features it emulates and/or exposes for L1. + */ + kvm_cpu_cap_mask(CPUID_8000_000A_EDX, 0); + kvm_cpu_cap_mask(CPUID_C000_0001_EDX, F(XSTORE) | F(XSTORE_EN) | F(XCRYPT) | F(XCRYPT_EN) | F(ACE2) | F(ACE2_EN) | F(PHE) | F(PHE_EN) | |