whiterose

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commit 5092adb2272e1760030a889aa4a3e9cf1d5f74b5
parent e572fa0e840154d33a69622af030dda551eee606
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Fri, 21 Dec 2018 11:15:36 -0800

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fix from Paolo Bonzini:
 "A simple patch for a pretty bad bug: Unbreak AMD nested
  virtualization."

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: nSVM: fix switch to guest mmu

Diffstat:
March/x86/kvm/svm.c | 4+++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c @@ -2937,6 +2937,8 @@ static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu, static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu) { WARN_ON(mmu_is_nested(vcpu)); + + vcpu->arch.mmu = &vcpu->arch.guest_mmu; kvm_init_shadow_mmu(vcpu); vcpu->arch.mmu->set_cr3 = nested_svm_set_tdp_cr3; vcpu->arch.mmu->get_cr3 = nested_svm_get_tdp_cr3; @@ -2949,6 +2951,7 @@ static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu) static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu) { + vcpu->arch.mmu = &vcpu->arch.root_mmu; vcpu->arch.walk_mmu = &vcpu->arch.root_mmu; } @@ -3458,7 +3461,6 @@ static void enter_svm_guest_mode(struct vcpu_svm *svm, u64 vmcb_gpa, svm->vcpu.arch.hflags &= ~HF_HIF_MASK; if (nested_vmcb->control.nested_ctl & SVM_NESTED_CTL_NP_ENABLE) { - kvm_mmu_unload(&svm->vcpu); svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3; nested_svm_init_mmu_context(&svm->vcpu); }