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1/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
2/*
3 * Userspace interface for AMD Secure Encrypted Virtualization (SEV)
4 * platform management commands.
5 *
6 * Copyright (C) 2016-2017 Advanced Micro Devices, Inc.
7 *
8 * Author: Brijesh Singh <brijesh.singh@amd.com>
9 *
10 * SEV API specification is available at: https://developer.amd.com/sev/
11 */
12
13#ifndef __PSP_SEV_USER_H__
14#define __PSP_SEV_USER_H__
15
16#include <linux/types.h>
17
18/**
19 * SEV platform commands
20 */
21enum {
22 SEV_FACTORY_RESET = 0,
23 SEV_PLATFORM_STATUS,
24 SEV_PEK_GEN,
25 SEV_PEK_CSR,
26 SEV_PDH_GEN,
27 SEV_PDH_CERT_EXPORT,
28 SEV_PEK_CERT_IMPORT,
29 SEV_GET_ID, /* This command is deprecated, use SEV_GET_ID2 */
30 SEV_GET_ID2,
31 SNP_PLATFORM_STATUS,
32 SNP_COMMIT,
33 SNP_SET_CONFIG,
34 SNP_VLEK_LOAD,
35
36 SEV_MAX,
37};
38
39/**
40 * SEV Firmware status code
41 */
42typedef enum {
43 /*
44 * This error code is not in the SEV spec. Its purpose is to convey that
45 * there was an error that prevented the SEV firmware from being called.
46 * The SEV API error codes are 16 bits, so the -1 value will not overlap
47 * with possible values from the specification.
48 */
49 SEV_RET_NO_FW_CALL = -1,
50 SEV_RET_SUCCESS = 0,
51 SEV_RET_INVALID_PLATFORM_STATE = 0x0001,
52 SEV_RET_INVALID_GUEST_STATE = 0x0002,
53 SEV_RET_INAVLID_CONFIG = 0x0003,
54 SEV_RET_INVALID_CONFIG = SEV_RET_INAVLID_CONFIG,
55 SEV_RET_INVALID_LEN = 0x0004,
56 SEV_RET_ALREADY_OWNED = 0x0005,
57 SEV_RET_INVALID_CERTIFICATE = 0x0006,
58 SEV_RET_POLICY_FAILURE = 0x0007,
59 SEV_RET_INACTIVE = 0x0008,
60 SEV_RET_INVALID_ADDRESS = 0x0009,
61 SEV_RET_BAD_SIGNATURE = 0x000A,
62 SEV_RET_BAD_MEASUREMENT = 0x000B,
63 SEV_RET_ASID_OWNED = 0x000C,
64 SEV_RET_INVALID_ASID = 0x000D,
65 SEV_RET_WBINVD_REQUIRED = 0x000E,
66 SEV_RET_DFFLUSH_REQUIRED = 0x000F,
67 SEV_RET_INVALID_GUEST = 0x0010,
68 SEV_RET_INVALID_COMMAND = 0x0011,
69 SEV_RET_ACTIVE = 0x0012,
70 SEV_RET_HWSEV_RET_PLATFORM = 0x0013,
71 SEV_RET_HWSEV_RET_UNSAFE = 0x0014,
72 SEV_RET_UNSUPPORTED = 0x0015,
73 SEV_RET_INVALID_PARAM = 0x0016,
74 SEV_RET_RESOURCE_LIMIT = 0x0017,
75 SEV_RET_SECURE_DATA_INVALID = 0x0018,
76 SEV_RET_INVALID_PAGE_SIZE = 0x0019,
77 SEV_RET_INVALID_PAGE_STATE = 0x001A,
78 SEV_RET_INVALID_MDATA_ENTRY = 0x001B,
79 SEV_RET_INVALID_PAGE_OWNER = 0x001C,
80 SEV_RET_AEAD_OFLOW = 0x001D,
81 SEV_RET_EXIT_RING_BUFFER = 0x001F,
82 SEV_RET_RMP_INIT_REQUIRED = 0x0020,
83 SEV_RET_BAD_SVN = 0x0021,
84 SEV_RET_BAD_VERSION = 0x0022,
85 SEV_RET_SHUTDOWN_REQUIRED = 0x0023,
86 SEV_RET_UPDATE_FAILED = 0x0024,
87 SEV_RET_RESTORE_REQUIRED = 0x0025,
88 SEV_RET_RMP_INITIALIZATION_FAILED = 0x0026,
89 SEV_RET_INVALID_KEY = 0x0027,
90 SEV_RET_SHUTDOWN_INCOMPLETE = 0x0028,
91 SEV_RET_INCORRECT_BUFFER_LENGTH = 0x0030,
92 SEV_RET_EXPAND_BUFFER_LENGTH_REQUEST = 0x0031,
93 SEV_RET_SPDM_REQUEST = 0x0032,
94 SEV_RET_SPDM_ERROR = 0x0033,
95 SEV_RET_SEV_STATUS_ERR_IN_DEV_CONN = 0x0035,
96 SEV_RET_SEV_STATUS_INVALID_DEV_CTX = 0x0036,
97 SEV_RET_SEV_STATUS_INVALID_TDI_CTX = 0x0037,
98 SEV_RET_SEV_STATUS_INVALID_TDI = 0x0038,
99 SEV_RET_SEV_STATUS_RECLAIM_REQUIRED = 0x0039,
100 SEV_RET_IN_USE = 0x003A,
101 SEV_RET_SEV_STATUS_INVALID_DEV_STATE = 0x003B,
102 SEV_RET_SEV_STATUS_INVALID_TDI_STATE = 0x003C,
103 SEV_RET_SEV_STATUS_DEV_CERT_CHANGED = 0x003D,
104 SEV_RET_SEV_STATUS_RESYNC_REQ = 0x003E,
105 SEV_RET_SEV_STATUS_RESPONSE_TOO_LARGE = 0x003F,
106 SEV_RET_MAX,
107} sev_ret_code;
108
109/**
110 * struct sev_user_data_status - PLATFORM_STATUS command parameters
111 *
112 * @major: major API version
113 * @minor: minor API version
114 * @state: platform state
115 * @flags: platform config flags
116 * @build: firmware build id for API version
117 * @guest_count: number of active guests
118 */
119struct sev_user_data_status {
120 __u8 api_major; /* Out */
121 __u8 api_minor; /* Out */
122 __u8 state; /* Out */
123 __u32 flags; /* Out */
124 __u8 build; /* Out */
125 __u32 guest_count; /* Out */
126} __packed;
127
128#define SEV_STATUS_FLAGS_CONFIG_ES 0x0100
129
130/**
131 * struct sev_user_data_pek_csr - PEK_CSR command parameters
132 *
133 * @address: PEK certificate chain
134 * @length: length of certificate
135 */
136struct sev_user_data_pek_csr {
137 __u64 address; /* In */
138 __u32 length; /* In/Out */
139} __packed;
140
141/**
142 * struct sev_user_data_cert_import - PEK_CERT_IMPORT command parameters
143 *
144 * @pek_address: PEK certificate chain
145 * @pek_len: length of PEK certificate
146 * @oca_address: OCA certificate chain
147 * @oca_len: length of OCA certificate
148 */
149struct sev_user_data_pek_cert_import {
150 __u64 pek_cert_address; /* In */
151 __u32 pek_cert_len; /* In */
152 __u64 oca_cert_address; /* In */
153 __u32 oca_cert_len; /* In */
154} __packed;
155
156/**
157 * struct sev_user_data_pdh_cert_export - PDH_CERT_EXPORT command parameters
158 *
159 * @pdh_address: PDH certificate address
160 * @pdh_len: length of PDH certificate
161 * @cert_chain_address: PDH certificate chain
162 * @cert_chain_len: length of PDH certificate chain
163 */
164struct sev_user_data_pdh_cert_export {
165 __u64 pdh_cert_address; /* In */
166 __u32 pdh_cert_len; /* In/Out */
167 __u64 cert_chain_address; /* In */
168 __u32 cert_chain_len; /* In/Out */
169} __packed;
170
171/**
172 * struct sev_user_data_get_id - GET_ID command parameters (deprecated)
173 *
174 * @socket1: Buffer to pass unique ID of first socket
175 * @socket2: Buffer to pass unique ID of second socket
176 */
177struct sev_user_data_get_id {
178 __u8 socket1[64]; /* Out */
179 __u8 socket2[64]; /* Out */
180} __packed;
181
182/**
183 * struct sev_user_data_get_id2 - GET_ID command parameters
184 * @address: Buffer to store unique ID
185 * @length: length of the unique ID
186 */
187struct sev_user_data_get_id2 {
188 __u64 address; /* In */
189 __u32 length; /* In/Out */
190} __packed;
191
192/**
193 * struct sev_user_data_snp_status - SNP status
194 *
195 * @api_major: API major version
196 * @api_minor: API minor version
197 * @state: current platform state
198 * @is_rmp_initialized: whether RMP is initialized or not
199 * @rsvd: reserved
200 * @build_id: firmware build id for the API version
201 * @mask_chip_id: whether chip id is present in attestation reports or not
202 * @mask_chip_key: whether attestation reports are signed or not
203 * @vlek_en: VLEK (Version Loaded Endorsement Key) hashstick is loaded
204 * @feature_info: whether SNP_FEATURE_INFO command is available
205 * @rapl_dis: whether RAPL is disabled
206 * @ciphertext_hiding_cap: whether platform has ciphertext hiding capability
207 * @ciphertext_hiding_en: whether ciphertext hiding is enabled
208 * @rsvd1: reserved
209 * @guest_count: the number of guest currently managed by the firmware
210 * @current_tcb_version: current TCB version
211 * @reported_tcb_version: reported TCB version
212 */
213struct sev_user_data_snp_status {
214 __u8 api_major; /* Out */
215 __u8 api_minor; /* Out */
216 __u8 state; /* Out */
217 __u8 is_rmp_initialized:1; /* Out */
218 __u8 rsvd:7;
219 __u32 build_id; /* Out */
220 __u32 mask_chip_id:1; /* Out */
221 __u32 mask_chip_key:1; /* Out */
222 __u32 vlek_en:1; /* Out */
223 __u32 feature_info:1; /* Out */
224 __u32 rapl_dis:1; /* Out */
225 __u32 ciphertext_hiding_cap:1; /* Out */
226 __u32 ciphertext_hiding_en:1; /* Out */
227 __u32 rsvd1:25;
228 __u32 guest_count; /* Out */
229 __u64 current_tcb_version; /* Out */
230 __u64 reported_tcb_version; /* Out */
231} __packed;
232
233/**
234 * struct sev_user_data_snp_config - system wide configuration value for SNP.
235 *
236 * @reported_tcb: the TCB version to report in the guest attestation report.
237 * @mask_chip_id: whether chip id is present in attestation reports or not
238 * @mask_chip_key: whether attestation reports are signed or not
239 * @rsvd: reserved
240 * @rsvd1: reserved
241 */
242struct sev_user_data_snp_config {
243 __u64 reported_tcb ; /* In */
244 __u32 mask_chip_id:1; /* In */
245 __u32 mask_chip_key:1; /* In */
246 __u32 rsvd:30; /* In */
247 __u8 rsvd1[52];
248} __packed;
249
250/**
251 * struct sev_data_snp_vlek_load - SNP_VLEK_LOAD structure
252 *
253 * @len: length of the command buffer read by the PSP
254 * @vlek_wrapped_version: version of wrapped VLEK hashstick (Must be 0h)
255 * @rsvd: reserved
256 * @vlek_wrapped_address: address of a wrapped VLEK hashstick
257 * (struct sev_user_data_snp_wrapped_vlek_hashstick)
258 */
259struct sev_user_data_snp_vlek_load {
260 __u32 len; /* In */
261 __u8 vlek_wrapped_version; /* In */
262 __u8 rsvd[3]; /* In */
263 __u64 vlek_wrapped_address; /* In */
264} __packed;
265
266/**
267 * struct sev_user_data_snp_vlek_wrapped_vlek_hashstick - Wrapped VLEK data
268 *
269 * @data: Opaque data provided by AMD KDS (as described in SEV-SNP Firmware ABI
270 * 1.54, SNP_VLEK_LOAD)
271 */
272struct sev_user_data_snp_wrapped_vlek_hashstick {
273 __u8 data[432]; /* In */
274} __packed;
275
276/**
277 * struct sev_issue_cmd - SEV ioctl parameters
278 *
279 * @cmd: SEV commands to execute
280 * @opaque: pointer to the command structure
281 * @error: SEV FW return code on failure
282 */
283struct sev_issue_cmd {
284 __u32 cmd; /* In */
285 __u64 data; /* In */
286 __u32 error; /* Out */
287} __packed;
288
289#define SEV_IOC_TYPE 'S'
290#define SEV_ISSUE_CMD _IOWR(SEV_IOC_TYPE, 0x0, struct sev_issue_cmd)
291
292#endif /* __PSP_USER_SEV_H */