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1/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
2/*
3 * Userspace interface for AMD SEV and SNP guest driver.
4 *
5 * Copyright (C) 2021 Advanced Micro Devices, Inc.
6 *
7 * Author: Brijesh Singh <brijesh.singh@amd.com>
8 *
9 * SEV API specification is available at: https://developer.amd.com/sev/
10 */
11
12#ifndef __UAPI_LINUX_SEV_GUEST_H_
13#define __UAPI_LINUX_SEV_GUEST_H_
14
15#include <linux/types.h>
16
17struct snp_report_req {
18 /* user data that should be included in the report */
19 __u8 user_data[64];
20
21 /* The vmpl level to be included in the report */
22 __u32 vmpl;
23
24 /* Must be zero filled */
25 __u8 rsvd[28];
26};
27
28struct snp_report_resp {
29 /* response data, see SEV-SNP spec for the format */
30 __u8 data[4000];
31};
32
33struct snp_derived_key_req {
34 __u32 root_key_select;
35 __u32 rsvd;
36 __u64 guest_field_select;
37 __u32 vmpl;
38 __u32 guest_svn;
39 __u64 tcb_version;
40};
41
42struct snp_derived_key_resp {
43 /* response data, see SEV-SNP spec for the format */
44 __u8 data[64];
45};
46
47struct snp_guest_request_ioctl {
48 /* message version number (must be non-zero) */
49 __u8 msg_version;
50
51 /* Request and response structure address */
52 __u64 req_data;
53 __u64 resp_data;
54
55 /* firmware error code on failure (see psp-sev.h) */
56 __u64 fw_err;
57};
58
59struct snp_ext_report_req {
60 struct snp_report_req data;
61
62 /* where to copy the certificate blob */
63 __u64 certs_address;
64
65 /* length of the certificate blob */
66 __u32 certs_len;
67};
68
69#define SNP_GUEST_REQ_IOC_TYPE 'S'
70
71/* Get SNP attestation report */
72#define SNP_GET_REPORT _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x0, struct snp_guest_request_ioctl)
73
74/* Get a derived key from the root */
75#define SNP_GET_DERIVED_KEY _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x1, struct snp_guest_request_ioctl)
76
77/* Get SNP extended report as defined in the GHCB specification version 2. */
78#define SNP_GET_EXT_REPORT _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x2, struct snp_guest_request_ioctl)
79
80#endif /* __UAPI_LINUX_SEV_GUEST_H_ */