linux-kernel - [PATCH v4 12/18] x86/sev: Enable NMI support for Secure AVIC

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Message-ID: <20250417091708.215826-13-Neeraj.Upadhyay@amd.com>
Date: Thu, 17 Apr 2025 14:47:02 +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>, <francescolavra.fl@...il.com>
Subject: [PATCH v4 12/18] 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
the hypervisor has been added, set V_NMI_ENABLE in VINTR_CTRL
field of VMSA to enable NMI for Secure AVIC guests.

Signed-off-by: Kishon Vijay Abraham I <kvijayab@....com>
Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
---
Changes since v3:

 - No change.

 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 7bc0c036b4d7..1dcd40e80a46 100644
--- a/arch/x86/coco/sev/core.c
+++ b/arch/x86/coco/sev/core.c
@@ -1189,7 +1189,7 @@ 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