Commit 268cbfe6 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
Browse files

KVM: SVM: WARN if an invalid posted interrupt IRTE entry is added 



Now that the AMD IOMMU doesn't signal success incorrectly, WARN if KVM
attempts to track an AMD IRTE entry without metadata.

Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
Message-ID: <20250404193923.1413163-8-seanjc@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent aae251a3

arch/x86/kvm/svm/avic.c

+4 −1
Original line number Diff line number Diff line
@@ -796,12 +796,15 @@ static int svm_ir_list_add(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi) 
	struct amd_svm_iommu_ir *ir;

	u64 entry;



	if (WARN_ON_ONCE(!pi->ir_data))

		return -EINVAL;



	/**

	 * In some cases, the existing irte is updated and re-set,

	 * so we need to check here if it's already been * added

	 * to the ir_list.

	 */

	if (pi->ir_data && (pi->prev_ga_tag != 0)) {

	if (pi->prev_ga_tag) {

		struct kvm *kvm = svm->vcpu.kvm;

		u32 vcpu_id = AVIC_GATAG_TO_VCPUID(pi->prev_ga_tag);

		struct kvm_vcpu *prev_vcpu = kvm_get_vcpu_by_id(kvm, vcpu_id);