linux-kernel - [RFC v2 08/17] x86/sev: Initialize VGIF for secondary VCPUs for Secure AVIC

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Message-ID: <20250226090525.231882-9-Neeraj.Upadhyay@amd.com>
Date: Wed, 26 Feb 2025 14:35:16 +0530
From: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
To: <linux-kernel@...r.kernel.org>
CC: <bp@...en8.de>, <tglx@...utronix.de>, <mingo@...hat.com>,
	<dave.hansen@...ux.intel.com>, <Thomas.Lendacky@....com>, <nikunj@....com>,
	<Santosh.Shukla@....com>, <Vasant.Hegde@....com>,
	<Suravee.Suthikulpanit@....com>, <David.Kaplan@....com>, <x86@...nel.org>,
	<hpa@...or.com>, <peterz@...radead.org>, <seanjc@...gle.com>,
	<pbonzini@...hat.com>, <kvm@...r.kernel.org>,
	<kirill.shutemov@...ux.intel.com>, <huibo.wang@....com>, <naveen.rao@....com>
Subject: [RFC v2 08/17] x86/sev: Initialize VGIF for secondary VCPUs for Secure AVIC

From: Kishon Vijay Abraham I <kvijayab@....com>

Secure AVIC requires VGIF to be configured in VMSA. Configure
for secondary vCPUs (the configuration for boot CPU is done in
hypervisor).

Signed-off-by: Kishon Vijay Abraham I <kvijayab@....com>
Signed-off-by: Neeraj Upadhyay <neeraj.upadhyay@....com>
---
Changes since v1:
 - No change

 arch/x86/coco/sev/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c
index e4c20023e554..8a4ad392d188 100644
--- a/arch/x86/coco/sev/core.c
+++ b/arch/x86/coco/sev/core.c
@@ -1272,6 +1272,9 @@ static int wakeup_cpu_via_vmgexit(u32 apic_id, unsigned long start_ip)
 	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;
 
-- 
2.34.1