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[RFC,12/19] KVM: SVM/SEV: Secure AVIC: Set VGIF in VMSA area

Message ID 20250228085115.105648-13-Neeraj.Upadhyay@amd.com (mailing list archive)
State New
Headers show
Series AMD: Add Secure AVIC KVM Support | expand

Commit Message

Neeraj Upadhyay Feb. 28, 2025, 8:51 a.m. UTC 
From: Kishon Vijay Abraham I <kvijayab@amd.com>

Secure AVIC requires VGIF in VMSA to be set in order for interrupts to
be delivered to the guest. Usually for enabling GIF, VGIF field (bit 9
of VINTR_CTRL in VMCB) is set. However Secure AVIC ignores the VGIF
field in VMCB and requires VGIF field in VINTR_CTRL of VMSA to be set.

Signed-off-by: Kishon Vijay Abraham I <kvijayab@amd.com>
Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
---
 arch/x86/kvm/svm/sev.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 5106afc40cc8..07a8a0c09382 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -854,6 +854,8 @@  static int sev_es_sync_vmsa(struct vcpu_svm *svm)
 	save->dr6  = svm->vcpu.arch.dr6;
 
 	save->sev_features = sev->vmsa_features;
+	if (sev_savic_active(vcpu->kvm))
+		save->vintr_ctrl |= V_GIF_MASK;
 
 	/*
 	 * Skip FPU and AVX setup with KVM_SEV_ES_INIT to avoid