KVM: nEPT: reset PDPTR register cache on nested vmentry emulation (72f85795) · Commits · 戴 / test

After nested vmentry stale cache can be used to reload L2 PDPTR pointers which will cause L2 guest to fail. Fix it by invalidating cache on nested vmentry emulation. https://bugzilla.kernel.org/show_bug.cgi?id=60830 Signed-off-by:

Gleb Natapov <gleb@redhat.com> Signed-off-by:

Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -7766,6 +7766,10 @@ static void prepare_vmcs02(struct kvm_vcpu vcpu, struct vmcs12 vmcs12)
		vmcs_write64(GUEST_PDPTR1, vmcs12->guest_pdptr1);
		vmcs_write64(GUEST_PDPTR2, vmcs12->guest_pdptr2);
		vmcs_write64(GUEST_PDPTR3, vmcs12->guest_pdptr3);
		__clear_bit(VCPU_EXREG_PDPTR,
		(unsigned long *)&vcpu->arch.regs_avail);
		__clear_bit(VCPU_EXREG_PDPTR,
		(unsigned long *)&vcpu->arch.regs_dirty);
		}

		kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->guest_rsp);

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