1*6c8c1406SKuppuswamy Sathyanarayanan /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*6c8c1406SKuppuswamy Sathyanarayanan /* 3*6c8c1406SKuppuswamy Sathyanarayanan * Userspace interface for TDX guest driver 4*6c8c1406SKuppuswamy Sathyanarayanan * 5*6c8c1406SKuppuswamy Sathyanarayanan * Copyright (C) 2022 Intel Corporation 6*6c8c1406SKuppuswamy Sathyanarayanan */ 7*6c8c1406SKuppuswamy Sathyanarayanan 8*6c8c1406SKuppuswamy Sathyanarayanan #ifndef _UAPI_LINUX_TDX_GUEST_H_ 9*6c8c1406SKuppuswamy Sathyanarayanan #define _UAPI_LINUX_TDX_GUEST_H_ 10*6c8c1406SKuppuswamy Sathyanarayanan 11*6c8c1406SKuppuswamy Sathyanarayanan #include <linux/ioctl.h> 12*6c8c1406SKuppuswamy Sathyanarayanan #include <linux/types.h> 13*6c8c1406SKuppuswamy Sathyanarayanan 14*6c8c1406SKuppuswamy Sathyanarayanan /* Length of the REPORTDATA used in TDG.MR.REPORT TDCALL */ 15*6c8c1406SKuppuswamy Sathyanarayanan #define TDX_REPORTDATA_LEN 64 16*6c8c1406SKuppuswamy Sathyanarayanan 17*6c8c1406SKuppuswamy Sathyanarayanan /* Length of TDREPORT used in TDG.MR.REPORT TDCALL */ 18*6c8c1406SKuppuswamy Sathyanarayanan #define TDX_REPORT_LEN 1024 19*6c8c1406SKuppuswamy Sathyanarayanan 20*6c8c1406SKuppuswamy Sathyanarayanan /** 21*6c8c1406SKuppuswamy Sathyanarayanan * struct tdx_report_req - Request struct for TDX_CMD_GET_REPORT0 IOCTL. 22*6c8c1406SKuppuswamy Sathyanarayanan * 23*6c8c1406SKuppuswamy Sathyanarayanan * @reportdata: User buffer with REPORTDATA to be included into TDREPORT. 24*6c8c1406SKuppuswamy Sathyanarayanan * Typically it can be some nonce provided by attestation 25*6c8c1406SKuppuswamy Sathyanarayanan * service, so the generated TDREPORT can be uniquely verified. 26*6c8c1406SKuppuswamy Sathyanarayanan * @tdreport: User buffer to store TDREPORT output from TDCALL[TDG.MR.REPORT]. 27*6c8c1406SKuppuswamy Sathyanarayanan */ 28*6c8c1406SKuppuswamy Sathyanarayanan struct tdx_report_req { 29*6c8c1406SKuppuswamy Sathyanarayanan __u8 reportdata[TDX_REPORTDATA_LEN]; 30*6c8c1406SKuppuswamy Sathyanarayanan __u8 tdreport[TDX_REPORT_LEN]; 31*6c8c1406SKuppuswamy Sathyanarayanan }; 32*6c8c1406SKuppuswamy Sathyanarayanan 33*6c8c1406SKuppuswamy Sathyanarayanan /* 34*6c8c1406SKuppuswamy Sathyanarayanan * TDX_CMD_GET_REPORT0 - Get TDREPORT0 (a.k.a. TDREPORT subtype 0) using 35*6c8c1406SKuppuswamy Sathyanarayanan * TDCALL[TDG.MR.REPORT] 36*6c8c1406SKuppuswamy Sathyanarayanan * 37*6c8c1406SKuppuswamy Sathyanarayanan * Return 0 on success, -EIO on TDCALL execution failure, and 38*6c8c1406SKuppuswamy Sathyanarayanan * standard errno on other general error cases. 39*6c8c1406SKuppuswamy Sathyanarayanan */ 40*6c8c1406SKuppuswamy Sathyanarayanan #define TDX_CMD_GET_REPORT0 _IOWR('T', 1, struct tdx_report_req) 41*6c8c1406SKuppuswamy Sathyanarayanan 42*6c8c1406SKuppuswamy Sathyanarayanan #endif /* _UAPI_LINUX_TDX_GUEST_H_ */ 43