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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Userspace interface for TDX guest driver
*
* Copyright (C) 2022 Intel Corporation
*/
#ifndef _LINUX_TDX_GUEST_H_
#define _LINUX_TDX_GUEST_H_
#include <linux/ioctl.h>
#include <linux/types.h>
/* Length of the REPORTDATA used in TDG.MR.REPORT TDCALL */
#define TDX_REPORTDATA_LEN 64
/* Length of TDREPORT used in TDG.MR.REPORT TDCALL */
#define TDX_REPORT_LEN 1024
/**
* struct tdx_report_req - Request struct for TDX_CMD_GET_REPORT0 IOCTL.
*
* @reportdata: User buffer with REPORTDATA to be included into TDREPORT.
* Typically it can be some nonce provided by attestation
* service, so the generated TDREPORT can be uniquely verified.
* @tdreport: User buffer to store TDREPORT output from TDCALL[TDG.MR.REPORT].
*/
struct tdx_report_req {
__u8 reportdata[TDX_REPORTDATA_LEN];
__u8 tdreport[TDX_REPORT_LEN];
};
/*
* TDX_CMD_GET_REPORT0 - Get TDREPORT0 (a.k.a. TDREPORT subtype 0) using
* TDCALL[TDG.MR.REPORT]
*
* Return 0 on success, -EIO on TDCALL execution failure, and
* standard errno on other general error cases.
*/
#define TDX_CMD_GET_REPORT0 _IOWR('T', 1, struct tdx_report_req)
#endif /* _LINUX_TDX_GUEST_H_ */