Commit c62c7bd4 authored by Lai Jiangshan's avatar Lai Jiangshan Committed by Paolo Bonzini
Browse files

KVM: VMX: Update vmcs.GUEST_CR3 only when the guest CR3 is dirty 



When vcpu->arch.cr3 is changed, it is marked dirty, so vmcs.GUEST_CR3
can be updated only when kvm_register_is_dirty(vcpu, VCPU_EXREG_CR3).

Signed-off-by: default avatarLai Jiangshan <laijs@linux.alibaba.com>
Message-Id: <20211108124407.12187-12-jiangshanlai@gmail.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 3883bc9d

arch/x86/kvm/vmx/vmx.c

+2 −2
Original line number Diff line number Diff line
@@ -3114,9 +3114,9 @@ static void vmx_load_mmu_pgd(struct kvm_vcpu *vcpu, hpa_t root_hpa, 


		if (!enable_unrestricted_guest && !is_paging(vcpu))

			guest_cr3 = to_kvm_vmx(kvm)->ept_identity_map_addr;

		else if (test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail))

		else if (kvm_register_is_dirty(vcpu, VCPU_EXREG_CR3))

			guest_cr3 = vcpu->arch.cr3;

		else /* vmcs01.GUEST_CR3 is already up-to-date. */

		else /* vmcs.GUEST_CR3 is already up-to-date. */

			update_guest_cr3 = false;

		vmx_ept_load_pdptrs(vcpu);

	} else {