linux-kernel - [RFC 14/14] x86/sev: Indicate SEV-SNP guest supports Secure AVIC

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Message-ID: <20240913113705.419146-15-Neeraj.Upadhyay@amd.com>
Date: Fri, 13 Sep 2024 17:07:05 +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 14/14] x86/sev: Indicate SEV-SNP guest supports Secure AVIC

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

Now that Secure AVIC support is added in the guest, indicate SEV-SNP
guest supports Secure AVIC.

Without this, the guest terminates booting with Non-Automatic Exit(NAE)
termination request event.

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

diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c
index ec038be0a048..fa5f1dc94e2b 100644
--- a/arch/x86/boot/compressed/sev.c
+++ b/arch/x86/boot/compressed/sev.c
@@ -402,7 +402,7 @@ void do_boot_stage2_vc(struct pt_regs *regs, unsigned long exit_code)
  * by the guest kernel. As and when a new feature is implemented in the
  * guest kernel, a corresponding bit should be added to the mask.
  */
-#define SNP_FEATURES_PRESENT	MSR_AMD64_SNP_DEBUG_SWAP
+#define SNP_FEATURES_PRESENT	(MSR_AMD64_SNP_DEBUG_SWAP | MSR_AMD64_SNP_SECURE_AVIC_ENABLED)
 
 u64 snp_get_unsupported_features(u64 status)
 {
-- 
2.34.1