/* SPDX-License-Identifier: GPL-2.0-only */
/*
* AMD Secure Encrypted Virtualization (SEV) driver interface
*
* Copyright (C) 2016-2017 Advanced Micro Devices, Inc.
*
* Author: Brijesh Singh <brijesh.singh@amd.com>
*
* SEV API spec is available at https://developer.amd.com/sev
*/
#ifndef __PSP_SEV_H__
#define __PSP_SEV_H__
#include <uapi/linux/psp-sev.h>
#ifdef CONFIG_X86
#include <linux/mem_encrypt.h>
#define __psp_pa(x) __sme_pa(x)
#else
#define __psp_pa(x) __pa(x)
#endif
#define SEV_FW_BLOB_MAX_SIZE 0x4000 /* 16KB */
/**
* SEV platform state
*/
enum sev_state {
SEV_STATE_UNINIT = 0x0,
SEV_STATE_INIT = 0x1,
SEV_STATE_WORKING = 0x2,
SEV_STATE_MAX
};
/**
* SEV platform and guest management commands
*/
enum sev_cmd {
/* platform commands */
SEV_CMD_INIT = 0x001,
SEV_CMD_SHUTDOWN = 0x002,
SEV_CMD_FACTORY_RESET = 0x003,
SEV_CMD_PLATFORM_STATUS = 0x004,
SEV_CMD_PEK_GEN = 0x005,
SEV_CMD_PEK_CSR = 0x006,
SEV_CMD_PEK_CERT_IMPORT = 0x007,
SEV_CMD_PDH_CERT_EXPORT = 0x008,
SEV_CMD_PDH_GEN = 0x009,
SEV_CMD_DF_FLUSH = 0x00A,
SEV_CMD_DOWNLOAD_FIRMWARE = 0x00B,
SEV_CMD_GET_ID = 0x00C,
/* Guest commands */
SEV_CMD_DECOMMISSION = 0x020,
SEV_CMD_ACTIVATE = 0x021,
SEV_CMD_DEACTIVATE = 0x022,
SEV_CMD_GUEST_STATUS = 0x023,
/* Guest launch commands */
SEV_CMD_LAUNCH_START = 0x030,
SEV_CMD_LAUNCH_UPDATE_DATA = 0x031,
SEV_CMD_LAUNCH_UPDATE_VMSA = 0x032,
SEV_CMD_LAUNCH_MEASURE = 0x033,
SEV_CMD_LAUNCH_UPDATE_SECRET = 0x034,
SEV_CMD_LAUNCH_FINISH = 0x035,
SEV_CMD_ATTESTATION_REPORT = 0x036,
/* Guest migration commands (outgoing) */
SEV_CMD_SEND_START = 0x040,
SEV_CMD_SEND_UPDATE_DATA = 0x041,
SEV_CMD_SEND_UPDATE_VMSA = 0x042,
SEV_CMD_SEND_FINISH = 0x043,
SEV_CMD_SEND_CANCEL = 0x044,
/* Guest migration commands (incoming) */
SEV_CMD_RECEIVE_START = 0x050,
SEV_CMD_RECEIVE_UPDATE_DATA = 0x051,
SEV_CMD_RECEIVE_UPDATE_VMSA = 0x052,
SEV_CMD_RECEIVE_FINISH = 0x053,
/* Guest debug commands */
SEV_CMD_DBG_DECRYPT = 0x060,
SEV_CMD_DBG_ENCRYPT = 0x061,
SEV_CMD_MAX,
};
/**
* struct sev_data_init - INIT command parameters
*
* @flags: processing flags
* @tmr_address: system physical address used for SEV-ES
* @tmr_len: len of tmr_address
*/
struct sev_data_init {
u32 flags; /* In */
u32 reserved; /* In */
u64 tmr_address; /* In */
u32 tmr_len; /* In */
} __packed;
#define SEV_INIT_FLAGS_SEV_ES 0x01
/**
* struct sev_data_pek_csr - PEK_CSR command parameters
*
* @address: PEK certificate chain
* @len: len of certificate
*/
struct sev_data_pek_csr {
u64 address; /* In */
u32 len; /* In/Out */
} __packed;
/**
* struct sev_data_cert_import - PEK_CERT_IMPORT command parameters
*
* @pek_address: PEK certificate chain
* @pek_len: len of PEK certificate
* @oca_address: OCA certificate chain
* @oca_len: len of OCA certificate
*/
struct sev_data_pek_cert_import {
u64 pek_cert_address; /* In */
u32 pek_cert_len; /* In */
u32 reserved; /* In */
u64 oca_cert_address; /* In */
u32 oca_cert_len; /* In */
} __packed;
/**
* struct sev_data_download_firmware - DOWNLOAD_FIRMWARE command parameters
*
* @address: physical address of firmware image
* @len: len of the firmware image
*/
struct sev_data_download_firmware {
u64 address; /* In */
u32 len; /* In */
} __packed;
/**
* struct sev_data_get_id - GET_ID command parameters
*
* @address: physical address of region to place unique CPU ID(s)
* @len: len of the region
*/
struct sev_data_get_id {
u64 address; /* In */
u32 len; /* In/Out */
} __packed;
/**
* struct sev_data_pdh_cert_export - PDH_CERT_EXPORT command parameters
*
* @pdh_address: PDH certificate address
* @pdh_len: len of PDH certificate
* @cert_chain_address: PDH certificate chain
* @cert_chain_len: len of PDH certificate chain
*/
struct sev_data_pdh_cert_export {
u64 pdh_cert_address; /* In */
u32 pdh_cert_len; /* In/Out */
u32 reserved; /* In */
u64 cert_chain_address; /* In */
u32 cert_chain_len; /* In/Out */
} __packed;
/**
* struct sev_data_decommission - DECOMMISSION command parameters
*
* @handle: handle of the VM to decommission
*/
struct sev_data_decommission {
u32 handle; /* In */
} __packed;
/**
* struct sev_data_activate - ACTIVATE command parameters
*
* @handle: handle of the VM to activate
* @asid: asid assigned to the VM
*/
struct sev_data_activate {
u32 handle; /* In */
u32 asid; /* In */
} __packed;
/**
* struct sev_data_deactivate - DEACTIVATE command parameters
*
* @handle: handle of the VM to deactivate
*/
struct sev_data_deactivate {
u32 handle; /* In */
} __packed;
/**
* struct sev_data_guest_status - SEV GUEST_STATUS command parameters
*
* @handle: handle of the VM to retrieve status
* @policy: policy information for the VM
* @asid: current ASID of the VM
* @state: current state of the VM
*/
struct sev_data_guest_status {
u32 handle; /* In */
u32 policy; /* Out */
u32 asid; /* Out */
u8 state; /* Out */
} __packed;
/**
* struct sev_data_launch_start - LAUNCH_START command parameters
*
* @handle: handle assigned to the VM
* @policy: guest launch policy
* @dh_cert_address: physical address of DH certificate blob
* @dh_cert_len: len of DH certificate blob
* @session_address: physical address of session parameters
* @session_len: len of session parameters
*/
struct sev_data_launch_start {
u32 handle; /* In/Out */
u32 policy; /* In */
u64 dh_cert_address; /* In */
u32 dh_cert_len; /* In */
u32 reserved; /* In */
u64 session_address; /* In */
u32 session_len; /* In */
} __packed;
/**
* struct sev_data_launch_update_data - LAUNCH_UPDATE_DATA command parameter
*
* @handle: handle of the VM to update
* @len: len of memory to be encrypted
* @address: physical address of memory region to encrypt
*/
struct sev_data_launch_update_data {
u32 handle; /* In */
u32 reserved;
u64 address; /* In */
u32 len; /* In */
} __packed;
/**
* struct sev_data_launch_update_vmsa - LAUNCH_UPDATE_VMSA command
*
* @handle: handle of the VM
* @address: physical address of memory region to encrypt
* @len: len of memory region to encrypt
*/
struct sev_data_launch_update_vmsa {
u32 handle; /* In */
u32 reserved;
u64 address; /* In */
u32 len; /* In */
} __packed;
/**
* struct sev_data_launch_measure - LAUNCH_MEASURE command parameters
*
* @handle: handle of the VM to process
* @address: physical address containing the measurement blob
* @len: len of measurement blob
*/
struct sev_data_launch_measure {
u32 handle; /* In */
u32 reserved;
u64 address; /* In */
u32 len; /* In/Out */
} __packed;
/**
* struct sev_data_launch_secret - LAUNCH_SECRET command parameters
*
* @handle: handle of the VM to process
* @hdr_address: physical address containing the packet header
* @hdr_len: len of packet header
* @guest_address: system physical address of guest memory region
* @guest_len: len of guest_paddr
* @trans_address: physical address of transport memory buffer
* @trans_len: len of transport memory buffer
*/
struct sev_data_launch_secret {
u32 handle; /* In */
u32 reserved1;
u64 hdr_address; /* In */
u32 hdr_len; /* In */
u32 reserved2;
u64 guest_address; /* In */
u32 guest_len; /* In */
u32 reserved3;
u64 trans_address; /* In */
u32 trans_len; /* In */
} __packed;
/**
* struct sev_data_launch_finish - LAUNCH_FINISH command parameters
*
* @handle: handle of the VM to process
*/
struct sev_data_launch_finish {
u32 handle; /* In */
} __packed;
/**
* struct sev_data_send_start - SEND_START command parameters
*
* @handle: handle of the VM to process
* @policy: policy information for the VM
* @pdh_cert_address: physical address containing PDH certificate
* @pdh_cert_len: len of PDH certificate
* @plat_certs_address: physical address containing platform certificate
* @plat_certs_len: len of platform certificate
* @amd_certs_address: physical address containing AMD certificate
* @amd_certs_len: len of AMD certificate
* @session_address: physical address containing Session data
* @session_len: len of session data
*/
struct sev_data_send_start {
u32 handle; /* In */
u32 policy; /* Out */
u64 pdh_cert_address; /* In */
u32 pdh_cert_len; /* In */
u32 reserved1;
u64 plat_certs_address; /* In */
u32 plat_certs_len; /* In */
u32 reserved2;
u64 amd_certs_address; /* In */
u32 amd_certs_len; /* In */
u32 reserved3;
u64 session_address; /* In */
u32 session_len; /* In/Out */
} __packed;
/**
* struct sev_data_send_update - SEND_UPDATE_DATA command
*
* @handle: handle of the VM to process
* @hdr_address: physical address containing packet header
* @hdr_len: len of packet header
* @guest_address: physical address of guest memory region to send
* @guest_len: len of guest memory region to send
* @trans_address: physical address of host memory region
* @trans_len: len of host memory region
*/
struct sev_data_send_update_data {
u32 handle; /* In */
u32 reserved1;
u64 hdr_address; /* In */
u32 hdr_len; /* In/Out */
u32 reserved2;
u64 guest_address; /* In */
u32 guest_len; /* In */
u32 reserved3;
u64 trans_address; /* In */
u32 trans_len; /* In */
} __packed;
/**
* struct sev_data_send_update - SEND_UPDATE_VMSA command
*
* @handle: handle of the VM to process
* @hdr_address: physical address containing packet header
* @hdr_len: len of packet header
* @guest_address: physical address of guest memory region to send
* @guest_len: len of guest memory region to send
* @trans_address: physical address of host memory region
* @trans_len: len of host memory region
*/
struct sev_data_send_update_vmsa {
u32 handle; /* In */
u64 hdr_address; /* In */
u32 hdr_len; /* In/Out */
u32 reserved2;
u64 guest_address; /* In */
u32 guest_len; /* In */
u32 reserved3;
u64 trans_address; /* In */
u32 trans_len; /* In */
} __packed;
/**
* struct sev_data_send_finish - SEND_FINISH command parameters
*
* @handle: handle of the VM to process
*/
struct sev_data_send_finish {
u32 handle; /* In */
} __packed;
/**
* struct sev_data_send_cancel - SEND_CANCEL command parameters
*
* @handle: handle of the VM to process
*/
struct sev_data_send_cancel {
u32 handle; /* In */
} __packed;
/**
* struct sev_data_receive_start - RECEIVE_START command parameters
*
* @handle: handle of the VM to perform receive operation
* @pdh_cert_address: system physical address containing PDH certificate blob
* @pdh_cert_len: len of PDH certificate blob
* @session_address: system physical address containing session blob
* @session_len: len of session blob
*/
struct sev_data_receive_start {
u32 handle; /* In/Out */
u32 policy; /* In */
u64 pdh_cert_address; /* In */
u32 pdh_cert_len; /* In */
u32 reserved1;
u64 session_address; /* In */
u32 session_len; /* In */
} __packed;
/**
* struct sev_data_receive_update_data - RECEIVE_UPDATE_DATA command parameters
*
* @handle: handle of the VM to update
* @hdr_address: physical address containing packet header blob
* @hdr_len: len of packet header
* @guest_address: system physical address of guest memory region
* @guest_len: len of guest memory region
* @trans_address: system physical address of transport buffer
* @trans_len: len of transport buffer
*/
struct sev_data_receive_update_data {
u32 handle; /* In */
u32 reserved1;
u64 hdr_address; /* In */
u32 hdr_len; /* In */
u32 reserved2;
u64 guest_address; /* In */
u32 guest_len; /* In */
u32 reserved3;
u64 trans_address; /* In */
u32 trans_len; /* In */
} __packed;
/**
* struct sev_data_receive_update_vmsa - RECEIVE_UPDATE_VMSA command parameters
*
* @handle: handle of the VM to update
* @hdr_address: physical address containing packet header blob
* @hdr_len: len of packet header
* @guest_address: system physical address of guest memory region
* @guest_len: len of guest memory region
* @trans_address: system physical address of transport buffer
* @trans_len: len of transport buffer
*/
struct sev_data_receive_update_vmsa {
u32 handle; /* In */
u32 reserved1;
u64 hdr_address; /* In */
u32 hdr_len; /* In */
u32 reserved2;
u64 guest_address; /* In */
u32 guest_len; /* In */
u32 reserved3;
u64 trans_address; /* In */
u32 trans_len; /* In */
} __packed;
/**
* struct sev_data_receive_finish - RECEIVE_FINISH command parameters
*
* @handle: handle of the VM to finish
*/
struct sev_data_receive_finish {
u32 handle; /* In */
} __packed;
/**
* struct sev_data_dbg - DBG_ENCRYPT/DBG_DECRYPT command parameters
*
* @handle: handle of the VM to perform debug operation
* @src_addr: source address of data to operate on
* @dst_addr: destination address of data to operate on
* @len: len of data to operate on
*/
struct sev_data_dbg {
u32 handle; /* In */
u32 reserved;
u64 src_addr; /* In */
u64 dst_addr; /* In */
u32 len; /* In */
} __packed;
/**
* struct sev_data_attestation_report - SEV_ATTESTATION_REPORT command parameters
*
* @handle: handle of the VM
* @mnonce: a random nonce that will be included in the report.
* @address: physical address where the report will be copied.
* @len: length of the physical buffer.
*/
struct sev_data_attestation_report {
u32 handle; /* In */
u32 reserved;
u64 address; /* In */
u8 mnonce[16]; /* In */
u32 len; /* In/Out */
} __packed;
#ifdef CONFIG_CRYPTO_DEV_SP_PSP
/**
* sev_platform_init - perform SEV INIT command
*
* @error: SEV command return code
*
* Returns:
* 0 if the SEV successfully processed the command
* -%ENODEV if the SEV device is not available
* -%ENOTSUPP if the SEV does not support SEV
* -%ETIMEDOUT if the SEV command timed out
* -%EIO if the SEV returned a non-zero return code
*/
int sev_platform_init(int *error);
/**
* sev_platform_status - perform SEV PLATFORM_STATUS command
*
* @status: sev_user_data_status structure to be processed
* @error: SEV command return code
*
* Returns:
* 0 if the SEV successfully processed the command
* -%ENODEV if the SEV device is not available
* -%ENOTSUPP if the SEV does not support SEV
* -%ETIMEDOUT if the SEV command timed out
* -%EIO if the SEV returned a non-zero return code
*/
int sev_platform_status(struct sev_user_data_status *status, int *error);
/**
* sev_issue_cmd_external_user - issue SEV command by other driver with a file
* handle.
*
* This function can be used by other drivers to issue a SEV command on
* behalf of userspace. The caller must pass a valid SEV file descriptor
* so that we know that it has access to SEV device.
*
* @filep - SEV device file pointer
* @cmd - command to issue
* @data - command buffer
* @error: SEV command return code
*
* Returns:
* 0 if the SEV successfully processed the command
* -%ENODEV if the SEV device is not available
* -%ENOTSUPP if the SEV does not support SEV
* -%ETIMEDOUT if the SEV command timed out
* -%EIO if the SEV returned a non-zero return code
* -%EINVAL if the SEV file descriptor is not valid
*/
int sev_issue_cmd_external_user(struct file *filep, unsigned int id,
void *data, int *error);
/**
* sev_guest_deactivate - perform SEV DEACTIVATE command
*
* @deactivate: sev_data_deactivate structure to be processed
* @sev_ret: sev command return code
*
* Returns:
* 0 if the sev successfully processed the command
* -%ENODEV if the sev device is not available
* -%ENOTSUPP if the sev does not support SEV
* -%ETIMEDOUT if the sev command timed out
* -%EIO if the sev returned a non-zero return code
*/
int sev_guest_deactivate(struct sev_data_deactivate *data, int *error);
/**
* sev_guest_activate - perform SEV ACTIVATE command
*
* @activate: sev_data_activate structure to be processed
* @sev_ret: sev command return code
*
* Returns:
* 0 if the sev successfully processed the command
* -%ENODEV if the sev device is not available
* -%ENOTSUPP if the sev does not support SEV
* -%ETIMEDOUT if the sev command timed out
* -%EIO if the sev returned a non-zero return code
*/
int sev_guest_activate(struct sev_data_activate *data, int *error);
/**
* sev_guest_df_flush - perform SEV DF_FLUSH command
*
* @sev_ret: sev command return code
*
* Returns:
* 0 if the sev successfully processed the command
* -%ENODEV if the sev device is not available
* -%ENOTSUPP if the sev does not support SEV
* -%ETIMEDOUT if the sev command timed out
* -%EIO if the sev returned a non-zero return code
*/
int sev_guest_df_flush(int *error);
/**
* sev_guest_decommission - perform SEV DECOMMISSION command
*
* @decommission: sev_data_decommission structure to be processed
* @sev_ret: sev command return code
*
* Returns:
* 0 if the sev successfully processed the command
* -%ENODEV if the sev device is not available
* -%ENOTSUPP if the sev does not support SEV
* -%ETIMEDOUT if the sev command timed out
* -%EIO if the sev returned a non-zero return code
*/
int sev_guest_decommission(struct sev_data_decommission *data, int *error);
void *psp_copy_user_blob(u64 uaddr, u32 len);
#else /* !CONFIG_CRYPTO_DEV_SP_PSP */
static inline int
sev_platform_status(struct sev_user_data_status *status, int *error) { return -ENODEV; }
static inline int sev_platform_init(int *error) { return -ENODEV; }
static inline int
sev_guest_deactivate(struct sev_data_deactivate *data, int *error) { return -ENODEV; }
static inline int
sev_guest_decommission(struct sev_data_decommission *data, int *error) { return -ENODEV; }
static inline int
sev_guest_activate(struct sev_data_activate *data, int *error) { return -ENODEV; }
static inline int sev_guest_df_flush(int *error) { return -ENODEV; }
static inline int
sev_issue_cmd_external_user(struct file *filep, unsigned int id, void *data, int *error) { return -ENODEV; }
static inline void *psp_copy_user_blob(u64 __user uaddr, u32 len) { return ERR_PTR(-EINVAL); }
#endif /* CONFIG_CRYPTO_DEV_SP_PSP */
#endif /* __PSP_SEV_H__ */
