[PATCH v3 5/6] KVM: nVMX: Update mmu.base_role.nxe after EFER loading on VM-entry/exit

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This job is normally performed by the architectural EFER set service
which we cannot use as it prevents transitions that are valid when
switching between L1 and L2. So open-code the update of base_role.nxe
after changing EFER on VM-entry and exit.

Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
---
 arch/x86/kvm/vmx.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 9b0510b..7cc208a 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -7735,6 +7735,8 @@ static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
 		vcpu->arch.efer &= ~(EFER_LMA | EFER_LME);
 	/* Note: modifies VM_ENTRY/EXIT_CONTROLS and GUEST/HOST_IA32_EFER */
 	vmx_set_efer(vcpu, vcpu->arch.efer);
+	vcpu->arch.mmu.base_role.nxe =
+		(vcpu->arch.efer & EFER_NX) && !enable_ept;
 
 	if (nested_cpu_has_ept(vmcs12)) {
 		kvm_mmu_unload(vcpu);
@@ -8179,6 +8181,8 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
 	else
 		vcpu->arch.efer &= ~(EFER_LMA | EFER_LME);
 	vmx_set_efer(vcpu, vcpu->arch.efer);
+	vcpu->arch.mmu.base_role.nxe =
+		(vcpu->arch.efer & EFER_NX) && !enable_ept;
 
 	kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->host_rsp);
 	kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->host_rip);
-- 
1.7.3.4

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