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authorBrijesh Singh <brijesh.singh@amd.com>2024-01-26 07:11:23 +0300
committerBorislav Petkov (AMD) <bp@alien8.de>2024-01-29 22:34:19 +0300
commitf5db8841ebe59dbdf07fda797c88ccb51e0c893d (patch)
treeb66d6112bbb1cfc9dbc0a18d4dc88a97925c757d /Documentation/virt
parentc3b86e61b75645276aa2565649a6da5d6e77030f (diff)
downloadlinux-f5db8841ebe59dbdf07fda797c88ccb51e0c893d.tar.xz
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.rst27
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/virt/coco/sev-guest.rst b/Documentation/virt/coco/sev-guest.rst
index 68b0d2363af8..6d3d5d336e5f 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
============================