Commit fb279950 authored by Xiao Guangrong's avatar Xiao Guangrong Committed by Paolo Bonzini

KVM: vmx: obey KVM_QUIRK_CD_NW_CLEARED

OVMF depends on WB to boot fast, because it only clears caches after
it has set up MTRRs---which is too late.

Let's do writeback if CR0.CD is set to make it happy, similar to what
SVM is already doing.
Signed-off-by: default avatarXiao Guangrong <guangrong.xiao@intel.com>
Tested-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 41dbc6bc
...@@ -8650,7 +8650,10 @@ static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) ...@@ -8650,7 +8650,10 @@ static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
if (kvm_read_cr0(vcpu) & X86_CR0_CD) { if (kvm_read_cr0(vcpu) & X86_CR0_CD) {
ipat = VMX_EPT_IPAT_BIT; ipat = VMX_EPT_IPAT_BIT;
cache = MTRR_TYPE_UNCACHABLE; if (kvm_check_has_quirk(vcpu->kvm, KVM_QUIRK_CD_NW_CLEARED))
cache = MTRR_TYPE_WRBACK;
else
cache = MTRR_TYPE_UNCACHABLE;
goto exit; goto exit;
} }
......
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