| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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| 2 | /* |
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| 3 | * Userspace interface for TDX guest driver |
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| 4 | * |
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| 5 | * Copyright (C) 2022 Intel Corporation |
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| 6 | */ |
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| 7 | |
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| 8 | #ifndef _UAPI_LINUX_TDX_GUEST_H_ |
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| 9 | #define _UAPI_LINUX_TDX_GUEST_H_ |
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| 10 | |
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| 11 | #include <linux/ioctl.h> |
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| 12 | #include <linux/types.h> |
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| 13 | |
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| 14 | /* Length of the REPORTDATA used in TDG.MR.REPORT TDCALL */ |
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| 15 | #define TDX_REPORTDATA_LEN 64 |
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| 16 | |
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| 17 | /* Length of TDREPORT used in TDG.MR.REPORT TDCALL */ |
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| 18 | #define TDX_REPORT_LEN 1024 |
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| 19 | |
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| 20 | /** |
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| 21 | * struct tdx_report_req - Request struct for TDX_CMD_GET_REPORT0 IOCTL. |
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| 22 | * |
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| 23 | * @reportdata: User buffer with REPORTDATA to be included into TDREPORT. |
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| 24 | * Typically it can be some nonce provided by attestation |
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| 25 | * service, so the generated TDREPORT can be uniquely verified. |
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| 26 | * @tdreport: User buffer to store TDREPORT output from TDCALL[TDG.MR.REPORT]. |
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| 27 | */ |
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| 28 | struct tdx_report_req { |
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| 29 | __u8 reportdata[TDX_REPORTDATA_LEN]; |
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| 30 | __u8 tdreport[TDX_REPORT_LEN]; |
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| 31 | }; |
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| 32 | |
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| 33 | /* |
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| 34 | * TDX_CMD_GET_REPORT0 - Get TDREPORT0 (a.k.a. TDREPORT subtype 0) using |
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| 35 | * TDCALL[TDG.MR.REPORT] |
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| 36 | * |
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| 37 | * Return 0 on success, -EIO on TDCALL execution failure, and |
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| 38 | * standard errno on other general error cases. |
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| 39 | */ |
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| 40 | #define TDX_CMD_GET_REPORT0 _IOWR('T', 1, struct tdx_report_req) |
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| 41 | |
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| 42 | #endif /* _UAPI_LINUX_TDX_GUEST_H_ */ |
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| 43 | |
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