diff options
| author | Peter Gonda | 2023-03-07 20:24:39 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-11-20 11:52:13 +0100 |
| commit | a5b03f56d38d8e353d75803fa9bf04cdd15e5204 (patch) | |
| tree | 59ad26e69cf38d2ddd80e0576e32e305c819b667 /Documentation/virt | |
| parent | 7c7371b41a14e86f53e7dbe5baa7b1d3e0ab324b (diff) | |
crypto: ccp - Name -1 return value as SEV_RET_NO_FW_CALL
[ Upstream commit efb339a83368ab25de1a18c0fdff85e01c13a1ea ]
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
Stable-dep-of: db10cb9b5746 ("virt: sevguest: Fix passing a stack buffer as a scatterlist target")
Signed-off-by: Sasha Levin <sashal@kernel.org>
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 bf593e88cfd9..aa3e4c6a1f90 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 |