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| author | Wei Liu <wei.liu@kernel.org> | 2023-04-17 21:18:13 +0200 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2023-04-17 21:18:13 +0200 |
| commit | 21eb596fce6c9f034f4e1bd91210336815bf8048 (patch) | |
| tree | 7df638a58df39b2d8cab22908d7f0bf52a1f249e /Documentation | |
| parent | Driver: VMBus: Add Devicetree support (diff) | |
| parent | Merge branch 'x86/cc' into x86/sev (diff) | |
| download | linux-21eb596fce6c9f034f4e1bd91210336815bf8048.tar.xz linux-21eb596fce6c9f034f4e1bd91210336815bf8048.zip | |
Merge remote-tracking branch 'tip/x86/sev' into hyperv-next
Merge the following 6 patches from tip/x86/sev, which are taken from
Michael Kelley's series [0]. The rest of Michael's series depend on
them.
x86/hyperv: Change vTOM handling to use standard coco mechanisms
init: Call mem_encrypt_init() after Hyper-V hypercall init is done
x86/mm: Handle decryption/re-encryption of bss_decrypted consistently
Drivers: hv: Explicitly request decrypted in vmap_pfn() calls
x86/hyperv: Reorder code to facilitate future work
x86/ioremap: Add hypervisor callback for private MMIO mapping in coco VM
0: https://lore.kernel.org/linux-hyperv/1679838727-87310-1-git-send-email-mikelley@microsoft.com/
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/virt/coco/sev-guest.rst | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/Documentation/virt/coco/sev-guest.rst b/Documentation/virt/coco/sev-guest.rst index bf593e88cfd9..68b0d2363af8 100644 --- a/Documentation/virt/coco/sev-guest.rst +++ b/Documentation/virt/coco/sev-guest.rst @@ -37,11 +37,11 @@ along with a description: the return value. General error numbers (-ENOMEM, -EINVAL) are not detailed, but errors with specific meanings are. -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. +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 +the fw_error code will be set, otherwise fw_error will be set to -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 @@ -57,8 +57,14 @@ counter (e.g. counter overflow), then -EIO will be returned. __u64 req_data; __u64 resp_data; - /* firmware error code on failure (see psp-sev.h) */ - __u64 fw_err; + /* bits[63:32]: VMM error code, bits[31:0] firmware error code (see psp-sev.h) */ + union { + __u64 exitinfo2; + struct { + __u32 fw_error; + __u32 vmm_error; + }; + }; }; 2.1 SNP_GET_REPORT |