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x86/sev: Initialize VGIF for secondary vCPUs for Secure AVIC

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Virtual GIF (VGIF) provides masking capability for when virtual interrupts
(virtual maskable interrupts, virtual NMIs) can be taken by the guest vCPU.

The Secure AVIC hardware reads VGIF state from the vCPU's VMSA. So, set VGIF for
secondary CPUs (the configuration for the boot CPU is done by the hypervisor),
to unmask delivery of virtual interrupts  to the vCPU.

Signed-off-by: Kishon Vijay Abraham I <kvijayab@amd.com>
Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tianyu Lan <tiala@microsoft.com>
Link: https://lore.kernel.org/20250828111141.208920-1-Neeraj.Upadhyay@amd.com
This commit is contained in:
Kishon Vijay Abraham I
2025-09-01 12:48:35 +02:00
committed by Borislav Petkov (AMD)
parent ea7d792e11
commit c77683eccf
1 changed files with 3 additions and 0 deletions
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arch/x86/coco/sev/core.c
+3
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@@ -974,6 +974,9 @@ static int wakeup_cpu_via_vmgexit(u32 apic_id, unsigned long start_ip, unsigned
vmsa->x87_ftw = AP_INIT_X87_FTW_DEFAULT;
vmsa->x87_fcw = AP_INIT_X87_FCW_DEFAULT;
if (cc_platform_has(CC_ATTR_SNP_SECURE_AVIC))
vmsa->vintr_ctrl |= V_GIF_MASK;
/* SVME must be set. */
vmsa->efer = EFER_SVME;