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x86/sev: Indicate the SEV-SNP guest supports Secure AVIC

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Now that Secure AVIC support is complete, make it part of to the SNP present
features.

Co-developed-by: Kishon Vijay Abraham I <kvijayab@amd.com>
Signed-off-by: Kishon Vijay Abraham I <kvijayab@amd.com>
Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tianyu Lan <tiala@microsoft.com>
Link: https://lore.kernel.org/20250828113225.209174-1-Neeraj.Upadhyay@amd.com
This commit is contained in:
Neeraj Upadhyay 2025-08-28 17:02:24 +05:30 • committed by Borislav Petkov (AMD)
parent 952aefeebb
commit 27a17e0241
1 changed files with 8 additions and 1 deletions
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9
arch/x86/boot/compressed/sev.c
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@ -238,13 +238,20 @@ bool sev_es_check_ghcb_fault(unsigned long address)
MSR_AMD64_SNP_SECURE_AVIC | \
MSR_AMD64_SNP_RESERVED_MASK)
#ifdef CONFIG_AMD_SECURE_AVIC
#define SNP_FEATURE_SECURE_AVIC MSR_AMD64_SNP_SECURE_AVIC
#else
#define SNP_FEATURE_SECURE_AVIC 0
#endif
/*
* SNP_FEATURES_PRESENT is the mask of SNP features that are implemented
* 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 | \
MSR_AMD64_SNP_SECURE_TSC)
MSR_AMD64_SNP_SECURE_TSC | \
SNP_FEATURE_SECURE_AVIC)
u64 snp_get_unsupported_features(u64 status)
{