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| author | Nadav Amit <namit@cs.technion.ac.il> | 2014-05-07 15:32:50 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-05-07 17:25:22 +0200 |
| commit | 5f7dde7bbb3c628766676cbd63c0a1834035d6fa (patch) | |
| tree | 39fde3ae31697b7e1ef19af9f1d3d626d0f7e909 /arch/x86/kvm/cpuid.h | |
| parent | a4ab9d0cf1ef0bf521bb69099aa464f38c71393c (diff) | |
| download | linux-5f7dde7bbb3c628766676cbd63c0a1834035d6fa.tar.gz linux-5f7dde7bbb3c628766676cbd63c0a1834035d6fa.tar.bz2 linux-5f7dde7bbb3c628766676cbd63c0a1834035d6fa.zip | |
KVM: x86: Mark bit 7 in long-mode PDPTE according to 1GB pages support
In long-mode, bit 7 in the PDPTE is not reserved only if 1GB pages are
supported by the CPU. Currently the bit is considered by KVM as always
reserved.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/cpuid.h')
| -rw-r--r-- | arch/x86/kvm/cpuid.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h index eeecbed26ac7..f9087315e0cd 100644 --- a/arch/x86/kvm/cpuid.h +++ b/arch/x86/kvm/cpuid.h @@ -88,4 +88,11 @@ static inline bool guest_cpuid_has_x2apic(struct kvm_vcpu *vcpu) return best && (best->ecx & bit(X86_FEATURE_X2APIC)); } +static inline bool guest_cpuid_has_gbpages(struct kvm_vcpu *vcpu) +{ + struct kvm_cpuid_entry2 *best; + + best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); + return best && (best->edx & bit(X86_FEATURE_GBPAGES)); +} #endif |