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[v2,22/25] x86/cpufeatures: Enable/unmask SEV-SNP CPU feature

Message ID 20240126041126.1927228-23-michael.roth@amd.com (mailing list archive)
State New, archived
Headers show
Series Add AMD Secure Nested Paging (SEV-SNP) Initialization Support | expand

Commit Message

Michael Roth Jan. 26, 2024, 4:11 a.m. UTC 
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>
---
 arch/x86/include/asm/disabled-features.h | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/arch/x86/include/asm/disabled-features.h b/arch/x86/include/asm/disabled-features.h
index 1ea64d4e7021..85a7b5ce96c9 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