Commit df4f3108 authored Dec 21, 2010 by Andre Przywara Committed by Avi Kivity Jan 12, 2011

KVM: SVM: implement enhanced INVLPG intercept



When the DecodeAssist feature is available, the linear address
is provided in the VMCB on INVLPG intercepts. Use it directly to
avoid any decoding and emulation.
This is only useful for shadow paging, though.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

parent cae3797a

arch/x86/kvm/svm.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -2652,7 +2652,12 @@ static int iret_interception(struct vcpu_svm *svm)

		static int invlpg_interception(struct vcpu_svm *svm)
		{
		if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
		return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;

		kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
		skip_emulated_instruction(&svm->vcpu);
		return 1;
		}

		static int emulate_on_interception(struct vcpu_svm *svm)