linux-kernel - [RFC v2 17/17] x86/sev: Indicate SEV-SNP guest supports Secure AVIC

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Message-ID: <20250226090525.231882-18-Neeraj.Upadhyay@amd.com>
Date: Wed, 26 Feb 2025 14:35:25 +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 17/17] 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.

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

 arch/x86/boot/compressed/sev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c
index 798fdd3dbd1e..385063ceb89c 100644
--- a/arch/x86/boot/compressed/sev.c
+++ b/arch/x86/boot/compressed/sev.c
@@ -403,7 +403,8 @@ void do_boot_stage2_vc(struct pt_regs *regs, unsigned long exit_code)
  * guest kernel, a corresponding bit should be added to the mask.
  */
 #define SNP_FEATURES_PRESENT	(MSR_AMD64_SNP_DEBUG_SWAP |	\
-				 MSR_AMD64_SNP_SECURE_TSC)
+				 MSR_AMD64_SNP_SECURE_TSC |	\
+				 MSR_AMD64_SNP_SECURE_AVIC)
 
 u64 snp_get_unsupported_features(u64 status)
 {
-- 
2.34.1