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| author | Peter Gonda <pgonda@google.com> | 2023-03-07 20:24:39 +0100 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-03-21 11:37:32 +0100 |
| commit | efb339a83368ab25de1a18c0fdff85e01c13a1ea (patch) | |
| tree | d6a2d9ffeaefb71d5a1942020b71020a4ca1852f /Documentation/virt | |
| parent | e8d018dd0257f744ca50a729e3d042cf2ec9da65 (diff) | |
| download | linux-efb339a83368ab25de1a18c0fdff85e01c13a1ea.tar.gz | |
crypto: ccp - Name -1 return value as SEV_RET_NO_FW_CALL
The PSP can return a "firmware error" code of -1 in circumstances where
the PSP has not actually been called. To make this protocol unambiguous,
name the value SEV_RET_NO_FW_CALL.
[ bp: Massage a bit. ]
Signed-off-by: Peter Gonda <pgonda@google.com>
Signed-off-by: Dionna Glaze <dionnaglaze@google.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20221207010210.2563293-2-dionnaglaze@google.com
Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/coco/sev-guest.rst | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/virt/coco/sev-guest.rst b/Documentation/virt/coco/sev-guest.rst index bf593e88cfd9d..aa3e4c6a1f90c 100644 --- a/Documentation/virt/coco/sev-guest.rst +++ b/Documentation/virt/coco/sev-guest.rst @@ -40,8 +40,8 @@ along with a description: The guest ioctl should be issued on a file descriptor of the /dev/sev-guest device. The ioctl accepts struct snp_user_guest_request. The input and output structure is specified through the req_data and resp_data field respectively. If the ioctl fails -to execute due to a firmware error, then fw_err code will be set otherwise the -fw_err will be set to 0x00000000000000ff. +to execute due to a firmware error, then fw_err code will be set. Otherwise, fw_err +will be set to 0x00000000ffffffff, i.e., the lower 32-bits are -1. The firmware checks that the message sequence counter is one greater than the guests message sequence counter. If guest driver fails to increment message |