diff options
| author | Tom Lendacky <thomas.lendacky@amd.com> | 2024-06-05 10:18:45 -0500 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2024-06-11 07:22:46 +0200 |
| commit | 878e70dbd26e234e6e6941dac3a233af6f632184 (patch) | |
| tree | a72b58480c89933154a92ba6546de8e03778b48f /arch/x86/include/asm/sev-common.h | |
| parent | b547fc2c9927a95808ef93d7fbd5dd70679fb501 (diff) | |
x86/sev: Check for the presence of an SVSM in the SNP secrets page
During early boot phases, check for the presence of an SVSM when running
as an SEV-SNP guest.
An SVSM is present if not running at VMPL0 and the 64-bit value at offset
0x148 into the secrets page is non-zero. If an SVSM is present, save the
SVSM Calling Area address (CAA), located at offset 0x150 into the secrets
page, and set the VMPL level of the guest, which should be non-zero, to
indicate the presence of an SVSM.
[ bp: Touchups. ]
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/9d3fe161be93d4ea60f43c2a3f2c311fe708b63b.1717600736.git.thomas.lendacky@amd.com
Diffstat (limited to 'arch/x86/include/asm/sev-common.h')
| -rw-r--r-- | arch/x86/include/asm/sev-common.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h index 5a8246dd532f..d31f2ed398f0 100644 --- a/arch/x86/include/asm/sev-common.h +++ b/arch/x86/include/asm/sev-common.h @@ -163,6 +163,10 @@ struct snp_psc_desc { #define GHCB_TERM_NOT_VMPL0 3 /* SNP guest is not running at VMPL-0 */ #define GHCB_TERM_CPUID 4 /* CPUID-validation failure */ #define GHCB_TERM_CPUID_HV 5 /* CPUID failure during hypervisor fallback */ +#define GHCB_TERM_SECRETS_PAGE 6 /* Secrets page failure */ +#define GHCB_TERM_NO_SVSM 7 /* SVSM is not advertised in the secrets page */ +#define GHCB_TERM_SVSM_VMPL0 8 /* SVSM is present but has set VMPL to 0 */ +#define GHCB_TERM_SVSM_CAA 9 /* SVSM is present but CAA is not page aligned */ #define GHCB_RESP_CODE(v) ((v) & GHCB_MSR_INFO_MASK) |