linux-kernel - [RFC 12/14] x86/sev: Enable NMI support for Secure AVIC

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Message-ID: <20240913113705.419146-13-Neeraj.Upadhyay@amd.com>
Date: Fri, 13 Sep 2024 17:07:03 +0530
From: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
To: <linux-kernel@...r.kernel.org>
CC: <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>, <bp@...en8.de>,
	<David.Kaplan@....com>, <x86@...nel.org>, <hpa@...or.com>,
	<peterz@...radead.org>, <seanjc@...gle.com>, <pbonzini@...hat.com>,
	<kvm@...r.kernel.org>
Subject: [RFC 12/14] x86/sev: Enable NMI support for Secure AVIC

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

Now that support to send NMI IPI and support to inject NMI from
hypervisor has been added, set V_NMI_ENABLE in VINTR_CTRL field of
VMSA to enable NMI.

Signed-off-by: Kishon Vijay Abraham I <kvijayab@....com>
Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
---
 arch/x86/coco/sev/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c
index 3c832c9befab..d0057a2a7d4a 100644
--- a/arch/x86/coco/sev/core.c
+++ b/arch/x86/coco/sev/core.c
@@ -1191,7 +1191,7 @@ static int wakeup_cpu_via_vmgexit(u32 apic_id, unsigned long start_ip)
 	vmsa->x87_fcw		= AP_INIT_X87_FCW_DEFAULT;
 
 	if (cc_platform_has(CC_ATTR_SNP_SECURE_AVIC))
-		vmsa->vintr_ctrl	|= V_GIF_MASK;
+		vmsa->vintr_ctrl	|= (V_GIF_MASK | V_NMI_ENABLE_MASK);
 
 	/* SVME must be set. */
 	vmsa->efer		= EFER_SVME;
-- 
2.34.1