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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Sep 2025 05:06:19.7950 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d8658dba-d3f6-426a-3dca-08ddfa5eeef5 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: MWH0EPF000971E4.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB8802 Content-Type: text/plain; charset="utf-8" From: Kishon Vijay Abraham I Unlike standard SVM which uses the V_GIF (Virtual Global Interrupt Flag) bit in the VMCB, Secure AVIC ignores this field. Instead, the hardware requires an equivalent V_GIF bit to be set within the vintr_ctrl field of the VMSA (Virtual Machine Save Area). Failure to set this bit will cause the hardware to block all interrupt delivery, rendering the guest non-functional. To enable interrupts for Secure AVIC guests, modify sev_es_sync_vmsa() to unconditionally set the V_GIF_MASK in the VMSA's vintr_ctrl field whenever Secure AVIC is active. This ensures the hardware correctly identifies the guest as interruptible. Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Neeraj Upadhyay --- arch/x86/kvm/svm/sev.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 837ab55a3330..2dee210efb37 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -884,6 +884,9 @@ static int sev_es_sync_vmsa(struct vcpu_svm *svm) =20 save->sev_features =3D sev->vmsa_features; =20 + if (sev_savic_active(vcpu->kvm)) + save->vintr_ctrl |=3D V_GIF_MASK; + /* * Skip FPU and AVX setup with KVM_SEV_ES_INIT to avoid * breaking older measurements. --=20 2.34.1