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| author | Brijesh Singh <brijesh.singh@amd.com> | 2022-04-26 18:07:46 +0000 |
|---|---|---|
| committer | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2022-07-13 17:27:27 -0500 |
| commit | 14713010672cd777f2fd8899db582c68b1465a35 (patch) | |
| tree | 31e095ce1d3f8ba730d90e01cc56c8bca77017e7 /include | |
| parent | 30443c787ff81af54b328dd70f804862b89f31dc (diff) | |
| download | cachepc-linux-14713010672cd777f2fd8899db582c68b1465a35.tar.gz cachepc-linux-14713010672cd777f2fd8899db582c68b1465a35.zip | |
crypto: ccp: Provide APIs to query extended attestation report
Version 2 of the GHCB specification defines VMGEXIT that is used to get
the extended attestation report. The extended attestation report includes
the certificate blobs provided through the SNP_SET_EXT_CONFIG.
The snp_guest_ext_guest_request() will be used by the hypervisor to get
the extended attestation report. See the GHCB specification for more
details.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/psp-sev.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h index a3bb792bb842..cd37ccd1fa1f 100644 --- a/include/linux/psp-sev.h +++ b/include/linux/psp-sev.h @@ -945,6 +945,23 @@ void *psp_copy_user_blob(u64 uaddr, u32 len); void *snp_alloc_firmware_page(gfp_t mask); void snp_free_firmware_page(void *addr); +/** + * snp_guest_ext_guest_request - perform the SNP extended guest request command + * defined in the GHCB specification. + * + * @data: the input guest request structure + * @vaddr: address where the certificate blob need to be copied. + * @npages: number of pages for the certificate blob. + * If the specified page count is less than the certificate blob size, then the + * required page count is returned with error code defined in the GHCB spec. + * If the specified page count is more than the certificate blob size, then + * page count is updated to reflect the amount of valid data copied in the + * vaddr. + */ +int snp_guest_ext_guest_request(struct sev_data_snp_guest_request *data, + unsigned long vaddr, unsigned long *npages, + unsigned long *error); + #else /* !CONFIG_CRYPTO_DEV_SP_PSP */ static inline int @@ -992,6 +1009,13 @@ static inline void *snp_alloc_firmware_page(gfp_t mask) static inline void snp_free_firmware_page(void *addr) { } +static inline int snp_guest_ext_guest_request(struct sev_data_snp_guest_request *data, + unsigned long vaddr, unsigned long *n, + unsigned long *error) +{ + return -ENODEV; +} + #endif /* CONFIG_CRYPTO_DEV_SP_PSP */ #endif /* __PSP_SEV_H__ */ |