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| author |  Sean Christopherson <sean.j.christopherson@intel.com>
| 2020-03-02 15:56:45 -0800 |
|---|---|---|
| committer |  Paolo Bonzini <pbonzini@redhat.com>
| 2020-03-16 17:58:26 +0100 |
| commit | 8721f5b061eb18c4bb3b77be3ec1c2811ca574ba (patch) | |
| tree | 2e0363a7d843b6fd48b2ae8441cbeacc65620d7d /arch/x86/kvm/cpuid.h | |
| parent | KVM: x86: Move XSAVES CPUID adjust to VMX's KVM cpu cap update (diff) | |
| download | linux-8721f5b061eb18c4bb3b77be3ec1c2811ca574ba.tar.gz linux-8721f5b061eb18c4bb3b77be3ec1c2811ca574ba.tar.bz2 linux-8721f5b061eb18c4bb3b77be3ec1c2811ca574ba.zip | |
KVM: x86: Add a helper to check kernel support when setting cpu cap
Add a helper, kvm_cpu_cap_check_and_set(), to query boot_cpu_has() as
part of setting a KVM cpu capability. VMX in particular has a number of
features that are dependent on both a VMCS capability and kernel
support.
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.h')
| -rw-r--r-- | arch/x86/kvm/cpuid.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h index 13374f885c81..fd29b646916a 100644 --- a/arch/x86/kvm/cpuid.h +++ b/arch/x86/kvm/cpuid.h @@ -282,4 +282,10 @@ static __always_inline void kvm_cpu_cap_set(unsigned int x86_feature) kvm_cpu_caps[x86_leaf] |= __feature_bit(x86_feature); } +static __always_inline void kvm_cpu_cap_check_and_set(unsigned int x86_feature) +{ + if (boot_cpu_has(x86_feature)) + kvm_cpu_cap_set(x86_feature); +} + #endif |