linux-headers (unknown)
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
17 struct 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
28 struct snp_report_resp {
29 /* response data, see SEV-SNP spec for the format */
30 __u8 data[4000];
31 };
32
33 struct 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
42 struct snp_derived_key_resp {
43 /* response data, see SEV-SNP spec for the format */
44 __u8 data[64];
45 };
46
47 struct 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 /* bits[63:32]: VMM error code, bits[31:0] firmware error code (see psp-sev.h) */
56 union {
57 __u64 exitinfo2;
58 struct {
59 __u32 fw_error;
60 __u32 vmm_error;
61 };
62 };
63 };
64
65 struct snp_ext_report_req {
66 struct snp_report_req data;
67
68 /* where to copy the certificate blob */
69 __u64 certs_address;
70
71 /* length of the certificate blob */
72 __u32 certs_len;
73 };
74
75 #define SNP_GUEST_REQ_IOC_TYPE 'S'
76
77 /* Get SNP attestation report */
78 #define SNP_GET_REPORT _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x0, struct snp_guest_request_ioctl)
79
80 /* Get a derived key from the root */
81 #define SNP_GET_DERIVED_KEY _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x1, struct snp_guest_request_ioctl)
82
83 /* Get SNP extended report as defined in the GHCB specification version 2. */
84 #define SNP_GET_EXT_REPORT _IOWR(SNP_GUEST_REQ_IOC_TYPE, 0x2, struct snp_guest_request_ioctl)
85
86 /* Guest message request EXIT_INFO_2 constants */
87 #define SNP_GUEST_FW_ERR_MASK GENMASK_ULL(31, 0)
88 #define SNP_GUEST_VMM_ERR_SHIFT 32
89 #define SNP_GUEST_VMM_ERR(x) (((u64)x) << SNP_GUEST_VMM_ERR_SHIFT)
90
91 #define SNP_GUEST_VMM_ERR_INVALID_LEN 1
92 #define SNP_GUEST_VMM_ERR_BUSY 2
93
94 #endif /* __UAPI_LINUX_SEV_GUEST_H_ */
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