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| author | Brijesh Singh <brijesh.singh@amd.com> | 2024-01-25 22:11:23 -0600 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2024-01-29 20:34:19 +0100 |
| commit | f5db8841ebe59dbdf07fda797c88ccb51e0c893d (patch) | |
| tree | b66d6112bbb1cfc9dbc0a18d4dc88a97925c757d /Documentation/virt | |
| parent | c3b86e61b75645276aa2565649a6da5d6e77030f (diff) | |
| download | linux-f5db8841ebe59dbdf07fda797c88ccb51e0c893d.tar.gz | |
crypto: ccp: Add the SNP_PLATFORM_STATUS command
This command is used to query the SNP platform status. See the SEV-SNP
spec for more details.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240126041126.1927228-24-michael.roth@amd.com
Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/coco/sev-guest.rst | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/virt/coco/sev-guest.rst b/Documentation/virt/coco/sev-guest.rst index 68b0d2363af820..6d3d5d336e5f00 100644 --- a/Documentation/virt/coco/sev-guest.rst +++ b/Documentation/virt/coco/sev-guest.rst @@ -67,6 +67,22 @@ counter (e.g. counter overflow), then -EIO will be returned. }; }; +The host ioctls are issued to a file descriptor of the /dev/sev device. +The ioctl accepts the command ID/input structure documented below. + +:: + struct sev_issue_cmd { + /* Command ID */ + __u32 cmd; + + /* Command request structure */ + __u64 data; + + /* Firmware error code on failure (see psp-sev.h) */ + __u32 error; + }; + + 2.1 SNP_GET_REPORT ------------------ @@ -124,6 +140,17 @@ be updated with the expected value. See GHCB specification for further detail on how to parse the certificate blob. +2.4 SNP_PLATFORM_STATUS +----------------------- +:Technology: sev-snp +:Type: hypervisor ioctl cmd +:Parameters (out): struct sev_user_data_snp_status +:Returns (out): 0 on success, -negative on error + +The SNP_PLATFORM_STATUS command is used to query the SNP platform status. The +status includes API major, minor version and more. See the SEV-SNP +specification for further details. + 3. SEV-SNP CPUID Enforcement ============================ |