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[v2,8/8] KVM: nVMX: Update mmu.base_role.nxe after EFER loading on VM-entry/exit

Message ID d3a3e58d1d3863fafc5d536070bd948c730d84fe.1375778397.git.jan.kiszka@web.de (mailing list archive)
State New, archived
Headers show

Commit Message

Jan Kiszka Aug. 6, 2013, 8:40 a.m. UTC 
From: Jan Kiszka <jan.kiszka@siemens.com>

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@siemens.com>
---
 arch/x86/kvm/vmx.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
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Patch

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 99a4a70..44494ed 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -7741,6 +7741,8 @@  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);
@@ -8185,6 +8187,8 @@  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);