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x86/cpufeatures: Enable/unmask SEV-SNP CPU feature 

With all the required host changes in place, it should now be possible
to initialize SNP-related MSR bits, set up RMP table enforcement, and
initialize SNP support in firmware while maintaining legacy support for
SEV/SEV-ES guests. Go ahead and enable the SNP feature now.

Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240126041126.1927228-23-michael.roth@amd.com
This commit is contained in:
Michael Roth 2024-01-25 22:11:22 -06:00 committed by Borislav Petkov (AMD)
parent 75253db41a
commit c3b86e61b7
1 changed files with 4 additions and 0 deletions
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4
arch/x86/include/asm/disabled-features.h
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@ -117,7 +117,11 @@
#define DISABLE_IBT (1 << (X86_FEATURE_IBT & 31))
#endif
#ifdef CONFIG_KVM_AMD_SEV
#define DISABLE_SEV_SNP 0
#else
#define DISABLE_SEV_SNP (1 << (X86_FEATURE_SEV_SNP & 31))
#endif
/*
* Make sure to add features to the correct mask