[PATCH v1 23/26] x86/cpufeatures: Enable/unmask SEV-SNP CPU feature

From: Michael Roth
Date: Sat Dec 30 2023 - 11:29:38 EST


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
running SEV/SEV-ES guests. Go ahead and enable the SNP feature now.

Signed-off-by: Michael Roth <michael.roth@xxxxxxx>
---
arch/x86/include/asm/disabled-features.h | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/x86/include/asm/disabled-features.h b/arch/x86/include/asm/disabled-features.h
index a864a5b208fa..3332d2940020 100644
--- a/arch/x86/include/asm/disabled-features.h
+++ b/arch/x86/include/asm/disabled-features.h
@@ -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
--
2.25.1