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x86/mm: Extend cc_attr to include AMD SEV-SNP

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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
This commit is contained in:
Brijesh Singh
2022-02-24 10:55:49 -06:00
committed by Borislav Petkov
parent bcce829083
commit f742b90e61
4 changed files with 17 additions and 0 deletions
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8
include/linux/cc_platform.h
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@@ -72,6 +72,14 @@ enum cc_attr {
* Examples include TDX guest & SEV.
*/
CC_ATTR_GUEST_UNROLL_STRING_IO,
/**
* @CC_ATTR_SEV_SNP: Guest SNP is active.
*
* The platform/OS is running as a guest/virtual machine and actively
* using AMD SEV-SNP features.
*/
CC_ATTR_GUEST_SEV_SNP,
};
#ifdef CONFIG_ARCH_HAS_CC_PLATFORM