linux-headers/linux/psp-sev.h

   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  */
  21 enum {
  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
  32         SEV_MAX,
  33 };
  34
  35 /**
  36  * SEV Firmware status code
  37  */
  38 typedef enum {
  39         /*
  40          * This error code is not in the SEV spec. Its purpose is to convey that
  41          * there was an error that prevented the SEV firmware from being called.
  42          * The SEV API error codes are 16 bits, so the -1 value will not overlap
  43          * with possible values from the specification.
  44          */
  45         SEV_RET_NO_FW_CALL = -1,
  46         SEV_RET_SUCCESS = 0,
  47         SEV_RET_INVALID_PLATFORM_STATE,
  48         SEV_RET_INVALID_GUEST_STATE,
  49         SEV_RET_INAVLID_CONFIG,
  50         SEV_RET_INVALID_LEN,
  51         SEV_RET_ALREADY_OWNED,
  52         SEV_RET_INVALID_CERTIFICATE,
  53         SEV_RET_POLICY_FAILURE,
  54         SEV_RET_INACTIVE,
  55         SEV_RET_INVALID_ADDRESS,
  56         SEV_RET_BAD_SIGNATURE,
  57         SEV_RET_BAD_MEASUREMENT,
  58         SEV_RET_ASID_OWNED,
  59         SEV_RET_INVALID_ASID,
  60         SEV_RET_WBINVD_REQUIRED,
  61         SEV_RET_DFFLUSH_REQUIRED,
  62         SEV_RET_INVALID_GUEST,
  63         SEV_RET_INVALID_COMMAND,
  64         SEV_RET_ACTIVE,
  65         SEV_RET_HWSEV_RET_PLATFORM,
  66         SEV_RET_HWSEV_RET_UNSAFE,
  67         SEV_RET_UNSUPPORTED,
  68         SEV_RET_INVALID_PARAM,
  69         SEV_RET_RESOURCE_LIMIT,
  70         SEV_RET_SECURE_DATA_INVALID,
  71         SEV_RET_MAX,
  72 } sev_ret_code;
  73
  74 /**
  75  * struct sev_user_data_status - PLATFORM_STATUS command parameters
  76  *
  77  * @major: major API version
  78  * @minor: minor API version
  79  * @state: platform state
  80  * @flags: platform config flags
  81  * @build: firmware build id for API version
  82  * @guest_count: number of active guests
  83  */
  84 struct sev_user_data_status {
  85         __u8 api_major;                         /* Out */
  86         __u8 api_minor;                         /* Out */
  87         __u8 state;                             /* Out */
  88         __u32 flags;                            /* Out */
  89         __u8 build;                             /* Out */
  90         __u32 guest_count;                      /* Out */
  91 } __attribute__((packed));
  92
  93 #define SEV_STATUS_FLAGS_CONFIG_ES      0x0100
  94
  95 /**
  96  * struct sev_user_data_pek_csr - PEK_CSR command parameters
  97  *
  98  * @address: PEK certificate chain
  99  * @length: length of certificate
 100  */
 101 struct sev_user_data_pek_csr {
 102         __u64 address;                          /* In */
 103         __u32 length;                           /* In/Out */
 104 } __attribute__((packed));
 105
 106 /**
 107  * struct sev_user_data_cert_import - PEK_CERT_IMPORT command parameters
 108  *
 109  * @pek_address: PEK certificate chain
 110  * @pek_len: length of PEK certificate
 111  * @oca_address: OCA certificate chain
 112  * @oca_len: length of OCA certificate
 113  */
 114 struct sev_user_data_pek_cert_import {
 115         __u64 pek_cert_address;                 /* In */
 116         __u32 pek_cert_len;                     /* In */
 117         __u64 oca_cert_address;                 /* In */
 118         __u32 oca_cert_len;                     /* In */
 119 } __attribute__((packed));
 120
 121 /**
 122  * struct sev_user_data_pdh_cert_export - PDH_CERT_EXPORT command parameters
 123  *
 124  * @pdh_address: PDH certificate address
 125  * @pdh_len: length of PDH certificate
 126  * @cert_chain_address: PDH certificate chain
 127  * @cert_chain_len: length of PDH certificate chain
 128  */
 129 struct sev_user_data_pdh_cert_export {
 130         __u64 pdh_cert_address;                 /* In */
 131         __u32 pdh_cert_len;                     /* In/Out */
 132         __u64 cert_chain_address;               /* In */
 133         __u32 cert_chain_len;                   /* In/Out */
 134 } __attribute__((packed));
 135
 136 /**
 137  * struct sev_user_data_get_id - GET_ID command parameters (deprecated)
 138  *
 139  * @socket1: Buffer to pass unique ID of first socket
 140  * @socket2: Buffer to pass unique ID of second socket
 141  */
 142 struct sev_user_data_get_id {
 143         __u8 socket1[64];                       /* Out */
 144         __u8 socket2[64];                       /* Out */
 145 } __attribute__((packed));
 146
 147 /**
 148  * struct sev_user_data_get_id2 - GET_ID command parameters
 149  * @address: Buffer to store unique ID
 150  * @length: length of the unique ID
 151  */
 152 struct sev_user_data_get_id2 {
 153         __u64 address;                          /* In */
 154         __u32 length;                           /* In/Out */
 155 } __attribute__((packed));
 156
 157 /**
 158  * struct sev_issue_cmd - SEV ioctl parameters
 159  *
 160  * @cmd: SEV commands to execute
 161  * @opaque: pointer to the command structure
 162  * @error: SEV FW return code on failure
 163  */
 164 struct sev_issue_cmd {
 165         __u32 cmd;                              /* In */
 166         __u64 data;                             /* In */
 167         __u32 error;                            /* Out */
 168 } __attribute__((packed));
 169
 170 #define SEV_IOC_TYPE            'S'
 171 #define SEV_ISSUE_CMD   _IOWR(SEV_IOC_TYPE, 0x0, struct sev_issue_cmd)
 172
 173 #endif /* __PSP_USER_SEV_H */