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1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
2 | /* | |
3 | * Userspace interface for TDX guest driver | |
4 | * | |
5 | * Copyright (C) 2022 Intel Corporation | |
6 | */ | |
7 | ||
8 | #ifndef _UAPI_LINUX_TDX_GUEST_H_ | |
9 | #define _UAPI_LINUX_TDX_GUEST_H_ | |
10 | ||
11 | #include <linux/ioctl.h> | |
12 | #include <linux/types.h> | |
13 | ||
14 | /* Length of the REPORTDATA used in TDG.MR.REPORT TDCALL */ | |
15 | #define TDX_REPORTDATA_LEN 64 | |
16 | ||
17 | /* Length of TDREPORT used in TDG.MR.REPORT TDCALL */ | |
18 | #define TDX_REPORT_LEN 1024 | |
19 | ||
20 | /** | |
21 | * struct tdx_report_req - Request struct for TDX_CMD_GET_REPORT0 IOCTL. | |
22 | * | |
23 | * @reportdata: User buffer with REPORTDATA to be included into TDREPORT. | |
24 | * Typically it can be some nonce provided by attestation | |
25 | * service, so the generated TDREPORT can be uniquely verified. | |
26 | * @tdreport: User buffer to store TDREPORT output from TDCALL[TDG.MR.REPORT]. | |
27 | */ | |
28 | struct tdx_report_req { | |
29 | __u8 reportdata[TDX_REPORTDATA_LEN]; | |
30 | __u8 tdreport[TDX_REPORT_LEN]; | |
31 | }; | |
32 | ||
33 | /* | |
34 | * TDX_CMD_GET_REPORT0 - Get TDREPORT0 (a.k.a. TDREPORT subtype 0) using | |
35 | * TDCALL[TDG.MR.REPORT] | |
36 | * | |
37 | * Return 0 on success, -EIO on TDCALL execution failure, and | |
38 | * standard errno on other general error cases. | |
39 | */ | |
40 | #define TDX_CMD_GET_REPORT0 _IOWR('T', 1, struct tdx_report_req) | |
41 | ||
42 | #endif /* _UAPI_LINUX_TDX_GUEST_H_ */ |