Commit 27a17e02 authored by Neeraj Upadhyay's avatar Neeraj Upadhyay Committed by Borislav Petkov (AMD)
Browse files

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



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

Co-developed-by: default avatarKishon Vijay Abraham I <kvijayab@amd.com>
Signed-off-by: default avatarKishon Vijay Abraham I <kvijayab@amd.com>
Signed-off-by: default avatarNeeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: default avatarTianyu Lan <tiala@microsoft.com>
Link: https://lore.kernel.org/20250828113225.209174-1-Neeraj.Upadhyay@amd.com
parent 952aefee

arch/x86/boot/compressed/sev.c

+8 −1
Original line number Diff line number Diff line
@@ -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)

{