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authorBrijesh Singh <brijesh.singh@amd.com>2022-02-24 19:55:49 +0300
committerBorislav Petkov <bp@suse.de>2022-04-06 14:02:34 +0300
commitf742b90e61bb53b27771f64bdae05db03a6ab1f2 (patch)
tree67e176343fb8dc60a5e69746f2b4e2c15fbb7056 /arch/x86/coco
parentbcce829083339bf862d66df602cbb111943da8fb (diff)
downloadlinux-f742b90e61bb53b27771f64bdae05db03a6ab1f2.tar.xz
x86/mm: Extend cc_attr to include AMD SEV-SNP
The CC_ATTR_GUEST_SEV_SNP can be used by the guest to query whether the SNP (Secure Nested Paging) feature is active. Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20220307213356.2797205-10-brijesh.singh@amd.com
Diffstat (limited to 'arch/x86/coco')
-rw-r--r--arch/x86/coco/core.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/coco/core.c b/arch/x86/coco/core.c
index fc1365dd927e..dafd4881ce29 100644
--- a/arch/x86/coco/core.c
+++ b/arch/x86/coco/core.c
@@ -57,6 +57,9 @@ static bool amd_cc_platform_has(enum cc_attr attr)
return (sev_status & MSR_AMD64_SEV_ENABLED) &&
!(sev_status & MSR_AMD64_SEV_ES_ENABLED);
+ case CC_ATTR_GUEST_SEV_SNP:
+ return sev_status & MSR_AMD64_SEV_SNP_ENABLED;
+
default:
return false;
}