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| author |   Brijesh Singh <brijesh.singh@amd.com> | 2022-02-24 10:56:23 -0600 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2022-04-07 16:47:12 +0200 |
| commit | 68de0b2f938642079c0c853b219bdb88c4dc4d13 (patch) | |
| tree | 47b4e86cd61144bd5fcba09a040c7e958828a31c /include/uapi/linux/sev-guest.h | |
| parent | virt: Add SEV-SNP guest driver (diff) | |
| download | linux-dev-68de0b2f938642079c0c853b219bdb88c4dc4d13.tar.xz linux-dev-68de0b2f938642079c0c853b219bdb88c4dc4d13.zip | |
virt: sevguest: Add support to derive key
The SNP_GET_DERIVED_KEY ioctl interface can be used by the SNP guest to
ask the firmware to provide a key derived from a root key. The derived
key may be used by the guest for any purposes it chooses, such as a
sealing key or communicating with the external entities.
See SEV-SNP firmware spec for more information.
[ bp: No need to memset "req" - it will get overwritten. ]
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Link: https://lore.kernel.org/r/20220307213356.2797205-45-brijesh.singh@amd.com
Diffstat (limited to 'include/uapi/linux/sev-guest.h')
| -rw-r--r-- | include/uapi/linux/sev-guest.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/uapi/linux/sev-guest.h b/include/uapi/linux/sev-guest.h index 38f11d723c68..598367f12064 100644 --- a/include/uapi/linux/sev-guest.h +++ b/include/uapi/linux/sev-guest.h @@ -30,6 +30,20 @@ struct snp_report_resp { __u8 data[4000]; }; +struct snp_derived_key_req { + __u32 root_key_select; + __u32 rsvd; + __u64 guest_field_select; + __u32 vmpl; + __u32 guest_svn; + __u64 tcb_version; +}; + +struct snp_derived_key_resp { + /* response data, see SEV-SNP spec for the format */ + __u8 data[64]; +}; + struct snp_guest_request_ioctl { /* message version number (must be non-zero) */ __u8 msg_version; @@ -47,4 +61,7 @@ struct snp_guest_request_ioctl { /* Get SNP attestation report */ #define SNP_GET_REPORT _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x0, struct snp_guest_request_ioctl) +/* Get a derived key from the root */ +#define SNP_GET_DERIVED_KEY _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x1, struct snp_guest_request_ioctl) + #endif /* __UAPI_LINUX_SEV_GUEST_H_ */ |