diff options
| author | Yan Zhao <[email protected]> | 2023-07-14 14:51:22 +0800 |
|---|---|---|
| committer | Sean Christopherson <[email protected]> | 2023-10-09 14:35:13 -0700 |
| commit | 7a18c7c2b69a2e47e95e2a381f9b01b9aae36747 (patch) | |
| tree | 4fdf316b059b6df0f887730711fca690bbfd0f88 | |
| parent | 1affe455d66de4e1743514afdeb99cb598a25aa2 (diff) | |
KVM: x86/mmu: Zap SPTEs when CR0.CD is toggled iff guest MTRRs are honored
Zap SPTEs when CR0.CD is toggled if and only if KVM's MMU is honoring
guest MTRRs, which is the only time that KVM incorporates the guest's
CR0.CD into the final memtype.
Suggested-by: Chao Gao <[email protected]>
Signed-off-by: Yan Zhao <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[sean: rephrase shortlog]
Signed-off-by: Sean Christopherson <[email protected]>
| -rw-r--r-- | arch/x86/kvm/x86.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 9f18b06bbda6..dc88b510db56 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -962,7 +962,7 @@ void kvm_post_set_cr0(struct kvm_vcpu *vcpu, unsigned long old_cr0, unsigned lon kvm_mmu_reset_context(vcpu); if (((cr0 ^ old_cr0) & X86_CR0_CD) && - kvm_arch_has_noncoherent_dma(vcpu->kvm) && + kvm_mmu_honors_guest_mtrrs(vcpu->kvm) && !kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) kvm_zap_gfn_range(vcpu->kvm, 0, ~0ULL); } |