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/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
/*
* Userspace interface for AMD Secure Encrypted Virtualization (SEV)
* platform management commands.
*
* Copyright (C) 2016-2017 Advanced Micro Devices, Inc.
*
* Author: Brijesh Singh <brijesh.singh@amd.com>
*
* SEV API specification is available at: https://developer.amd.com/sev/
*/
#ifndef __PSP_SEV_USER_H__
#define __PSP_SEV_USER_H__
#include <linux/types.h>
/**
* SEV platform commands
*/
enum {
SEV_FACTORY_RESET = 0,
SEV_PLATFORM_STATUS,
SEV_PEK_GEN,
SEV_PEK_CSR,
SEV_PDH_GEN,
SEV_PDH_CERT_EXPORT,
SEV_PEK_CERT_IMPORT,
SEV_GET_ID, /* This command is deprecated, use SEV_GET_ID2 */
SEV_GET_ID2,
SEV_MAX,
};
/**
* SEV Firmware status code
*/
typedef enum {
/*
* This error code is not in the SEV spec. Its purpose is to convey that
* there was an error that prevented the SEV firmware from being called.
* The SEV API error codes are 16 bits, so the -1 value will not overlap
* with possible values from the specification.
*/
SEV_RET_NO_FW_CALL = -1,
SEV_RET_SUCCESS = 0,
SEV_RET_INVALID_PLATFORM_STATE,
SEV_RET_INVALID_GUEST_STATE,
SEV_RET_INAVLID_CONFIG,
SEV_RET_INVALID_LEN,
SEV_RET_ALREADY_OWNED,
SEV_RET_INVALID_CERTIFICATE,
SEV_RET_POLICY_FAILURE,
SEV_RET_INACTIVE,
SEV_RET_INVALID_ADDRESS,
SEV_RET_BAD_SIGNATURE,
SEV_RET_BAD_MEASUREMENT,
SEV_RET_ASID_OWNED,
SEV_RET_INVALID_ASID,
SEV_RET_WBINVD_REQUIRED,
SEV_RET_DFFLUSH_REQUIRED,
SEV_RET_INVALID_GUEST,
SEV_RET_INVALID_COMMAND,
SEV_RET_ACTIVE,
SEV_RET_HWSEV_RET_PLATFORM,
SEV_RET_HWSEV_RET_UNSAFE,
SEV_RET_UNSUPPORTED,
SEV_RET_INVALID_PARAM,
SEV_RET_RESOURCE_LIMIT,
SEV_RET_SECURE_DATA_INVALID,
SEV_RET_MAX,
} sev_ret_code;
/**
* struct sev_user_data_status - PLATFORM_STATUS command parameters
*
* @major: major API version
* @minor: minor API version
* @state: platform state
* @flags: platform config flags
* @build: firmware build id for API version
* @guest_count: number of active guests
*/
struct sev_user_data_status {
__u8 api_major; /* Out */
__u8 api_minor; /* Out */
__u8 state; /* Out */
__u32 flags; /* Out */
__u8 build; /* Out */
__u32 guest_count; /* Out */
} __attribute__((packed));
#define SEV_STATUS_FLAGS_CONFIG_ES 0x0100
/**
* struct sev_user_data_pek_csr - PEK_CSR command parameters
*
* @address: PEK certificate chain
* @length: length of certificate
*/
struct sev_user_data_pek_csr {
__u64 address; /* In */
__u32 length; /* In/Out */
} __attribute__((packed));
/**
* struct sev_user_data_cert_import - PEK_CERT_IMPORT command parameters
*
* @pek_address: PEK certificate chain
* @pek_len: length of PEK certificate
* @oca_address: OCA certificate chain
* @oca_len: length of OCA certificate
*/
struct sev_user_data_pek_cert_import {
__u64 pek_cert_address; /* In */
__u32 pek_cert_len; /* In */
__u64 oca_cert_address; /* In */
__u32 oca_cert_len; /* In */
} __attribute__((packed));
/**
* struct sev_user_data_pdh_cert_export - PDH_CERT_EXPORT command parameters
*
* @pdh_address: PDH certificate address
* @pdh_len: length of PDH certificate
* @cert_chain_address: PDH certificate chain
* @cert_chain_len: length of PDH certificate chain
*/
struct sev_user_data_pdh_cert_export {
__u64 pdh_cert_address; /* In */
__u32 pdh_cert_len; /* In/Out */
__u64 cert_chain_address; /* In */
__u32 cert_chain_len; /* In/Out */
} __attribute__((packed));
/**
* struct sev_user_data_get_id - GET_ID command parameters (deprecated)
*
* @socket1: Buffer to pass unique ID of first socket
* @socket2: Buffer to pass unique ID of second socket
*/
struct sev_user_data_get_id {
__u8 socket1[64]; /* Out */
__u8 socket2[64]; /* Out */
} __attribute__((packed));
/**
* struct sev_user_data_get_id2 - GET_ID command parameters
* @address: Buffer to store unique ID
* @length: length of the unique ID
*/
struct sev_user_data_get_id2 {
__u64 address; /* In */
__u32 length; /* In/Out */
} __attribute__((packed));
/**
* struct sev_issue_cmd - SEV ioctl parameters
*
* @cmd: SEV commands to execute
* @opaque: pointer to the command structure
* @error: SEV FW return code on failure
*/
struct sev_issue_cmd {
__u32 cmd; /* In */
__u64 data; /* In */
__u32 error; /* Out */
} __attribute__((packed));
#define SEV_IOC_TYPE 'S'
#define SEV_ISSUE_CMD _IOWR(SEV_IOC_TYPE, 0x0, struct sev_issue_cmd)
#endif /* __PSP_USER_SEV_H */
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