/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Userspace interface for TDX guest driver
*
* Copyright ( C ) 2022 Intel Corporation
*/
#ifndef _UAPI_LINUX_TDX_GUEST_H_
#define _UAPI_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 /* _UAPI_LINUX_TDX_GUEST_H_ */
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