diff options
| author | Ashish Kalra <ashish.kalra@amd.com> | 2025-07-21 14:13:10 +0000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2025-08-16 17:20:23 +0800 |
| commit | 33cfb80d1910b41d1a25cef89b159c945aff0f24 (patch) | |
| tree | 362055037887c50dfd425e409181cd2a1d740263 /include/linux | |
| parent | 459daec42ea0cf5e276dfb82e90ed91e2db45d9e (diff) | |
crypto: ccp - Add support for SNP_FEATURE_INFO command
The FEATURE_INFO command provides hypervisors with a programmatic means
to learn about the supported features of the currently loaded firmware.
This command mimics the CPUID instruction relative to sub-leaf input and
the four unsigned integer output values. To obtain information
regarding the features present in the currently loaded SEV firmware,
use the SNP_FEATURE_INFO command.
Cache the SNP platform status and feature information from CPUID
0x8000_0024 in the sev_device structure. If SNP is enabled, utilize
this cached SNP platform status for the API major, minor and build
version.
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Reviewed-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/psp-sev.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h index 0f5f94137f6d..5fb6ae0f51cc 100644 --- a/include/linux/psp-sev.h +++ b/include/linux/psp-sev.h @@ -107,6 +107,7 @@ enum sev_cmd { SEV_CMD_SNP_DOWNLOAD_FIRMWARE_EX = 0x0CA, SEV_CMD_SNP_COMMIT = 0x0CB, SEV_CMD_SNP_VLEK_LOAD = 0x0CD, + SEV_CMD_SNP_FEATURE_INFO = 0x0CE, SEV_CMD_MAX, }; @@ -814,6 +815,34 @@ struct sev_data_snp_commit { u32 len; } __packed; +/** + * struct sev_data_snp_feature_info - SEV_SNP_FEATURE_INFO structure + * + * @length: len of the command buffer read by the PSP + * @ecx_in: subfunction index + * @feature_info_paddr : System Physical Address of the FEATURE_INFO structure + */ +struct sev_data_snp_feature_info { + u32 length; + u32 ecx_in; + u64 feature_info_paddr; +} __packed; + +/** + * struct feature_info - FEATURE_INFO structure + * + * @eax: output of SNP_FEATURE_INFO command + * @ebx: output of SNP_FEATURE_INFO command + * @ecx: output of SNP_FEATURE_INFO command + * #edx: output of SNP_FEATURE_INFO command + */ +struct snp_feature_info { + u32 eax; + u32 ebx; + u32 ecx; + u32 edx; +} __packed; + #ifdef CONFIG_CRYPTO_DEV_SP_PSP /** |