/* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
/*
* Copyright ( c ) 2015 - 2021 , Linaro Limited
*/
#ifndef _OPTEE_MSG_H
#define _OPTEE_MSG_H
#include <linux/bitops.h>
#include <linux/types.h>
/*
* This file defines the OP - TEE message protocol ( ABI ) used to communicate
* with an instance of OP - TEE running in secure world .
*
* This file is divided into two sections .
* 1 . Formatting of messages .
* 2 . Requests from normal world
*/
/*****************************************************************************
* Part 1 - formatting of messages
*****************************************************************************/
#define OPTEE_MSG_ATTR_TYPE_NONE 0 x0
#define OPTEE_MSG_ATTR_TYPE_VALUE_INPUT 0 x1
#define OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT 0 x2
#define OPTEE_MSG_ATTR_TYPE_VALUE_INOUT 0 x3
#define OPTEE_MSG_ATTR_TYPE_RMEM_INPUT 0 x5
#define OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT 0 x6
#define OPTEE_MSG_ATTR_TYPE_RMEM_INOUT 0 x7
#define OPTEE_MSG_ATTR_TYPE_FMEM_INPUT OPTEE_MSG_ATTR_TYPE_RMEM_INPUT
#define OPTEE_MSG_ATTR_TYPE_FMEM_OUTPUT OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT
#define OPTEE_MSG_ATTR_TYPE_FMEM_INOUT OPTEE_MSG_ATTR_TYPE_RMEM_INOUT
#define OPTEE_MSG_ATTR_TYPE_TMEM_INPUT 0 x9
#define OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT 0 xa
#define OPTEE_MSG_ATTR_TYPE_TMEM_INOUT 0 xb
#define OPTEE_MSG_ATTR_TYPE_MASK GENMASK(7 , 0 )
/*
* Meta parameter to be absorbed by the Secure OS and not passed
* to the Trusted Application .
*
* Currently only used with OPTEE_MSG_CMD_OPEN_SESSION .
*/
#define OPTEE_MSG_ATTR_META BIT(8 )
/*
* Pointer to a list of pages used to register user - defined SHM buffer .
* Used with OPTEE_MSG_ATTR_TYPE_TMEM_ * .
* buf_ptr should point to the beginning of the buffer . Buffer will contain
* list of page addresses . OP - TEE core can reconstruct contiguous buffer from
* that page addresses list . Page addresses are stored as 64 bit values .
* Last entry on a page should point to the next page of buffer .
* Every entry in buffer should point to a 4 k page beginning ( 12 least
* significant bits must be equal to zero ) .
*
* 12 least significant bits of optee_msg_param . u . tmem . buf_ptr should hold
* page offset of user buffer .
*
* So , entries should be placed like members of this structure :
*
* struct page_data {
* uint64_t pages_array [ OPTEE_MSG_NONCONTIG_PAGE_SIZE / sizeof ( uint64_t ) - 1 ] ;
* uint64_t next_page_data ;
* } ;
*
* Structure is designed to exactly fit into the page size
* OPTEE_MSG_NONCONTIG_PAGE_SIZE which is a standard 4 KB page .
*
* The size of 4 KB is chosen because this is the smallest page size for ARM
* architectures . If REE uses larger pages , it should divide them to 4 KB ones .
*/
#define OPTEE_MSG_ATTR_NONCONTIG BIT(9 )
/*
* Memory attributes for caching passed with temp memrefs . The actual value
* used is defined outside the message protocol with the exception of
* OPTEE_MSG_ATTR_CACHE_PREDEFINED which means the attributes already
* defined for the memory range should be used . If optee_smc . h is used as
* bearer of this protocol OPTEE_SMC_SHM_ * is used for values .
*/
#define OPTEE_MSG_ATTR_CACHE_SHIFT 16
#define OPTEE_MSG_ATTR_CACHE_MASK GENMASK(2 , 0 )
#define OPTEE_MSG_ATTR_CACHE_PREDEFINED 0
/*
* Same values as TEE_LOGIN_ * from TEE Internal API
*/
#define OPTEE_MSG_LOGIN_PUBLIC 0 x00000000
#define OPTEE_MSG_LOGIN_USER 0 x00000001
#define OPTEE_MSG_LOGIN_GROUP 0 x00000002
#define OPTEE_MSG_LOGIN_APPLICATION 0 x00000004
#define OPTEE_MSG_LOGIN_APPLICATION_USER 0 x00000005
#define OPTEE_MSG_LOGIN_APPLICATION_GROUP 0 x00000006
/*
* Page size used in non - contiguous buffer entries
*/
#define OPTEE_MSG_NONCONTIG_PAGE_SIZE 4096
#define OPTEE_MSG_FMEM_INVALID_GLOBAL_ID 0 xffffffffffffffff
/**
* struct optee_msg_param_tmem - temporary memory reference parameter
* @ buf_ptr : Address of the buffer
* @ size : Size of the buffer
* @ shm_ref : Temporary shared memory reference , pointer to a struct tee_shm
*
* Secure and normal world communicates pointers as physical address
* instead of the virtual address . This is because secure and normal world
* have completely independent memory mapping . Normal world can even have a
* hypervisor which need to translate the guest physical address ( AKA IPA
* in ARM documentation ) to a real physical address before passing the
* structure to secure world .
*/
struct optee_msg_param_tmem {
u64 buf_ptr;
u64 size;
u64 shm_ref;
};
/**
* struct optee_msg_param_rmem - registered memory reference parameter
* @ offs : Offset into shared memory reference
* @ size : Size of the buffer
* @ shm_ref : Shared memory reference , pointer to a struct tee_shm
*/
struct optee_msg_param_rmem {
u64 offs;
u64 size;
u64 shm_ref;
};
/**
* struct optee_msg_param_fmem - ffa memory reference parameter
* @ offs_lower : Lower bits of offset into shared memory reference
* @ offs_upper : Upper bits of offset into shared memory reference
* @ internal_offs : Internal offset into the first page of shared memory
* reference
* @ size : Size of the buffer
* @ global_id : Global identifier of Shared memory
*/
struct optee_msg_param_fmem {
u32 offs_low;
u16 offs_high;
u16 internal_offs;
u64 size;
u64 global_id;
};
/**
* struct optee_msg_param_value - opaque value parameter
*
* Value parameters are passed unchecked between normal and secure world .
*/
struct optee_msg_param_value {
u64 a;
u64 b;
u64 c;
};
/**
* struct optee_msg_param - parameter used together with struct optee_msg_arg
* @ attr : attributes
* @ tmem : parameter by temporary memory reference
* @ rmem : parameter by registered memory reference
* @ fmem : parameter by ffa registered memory reference
* @ value : parameter by opaque value
* @ octets : parameter by octet string
*
* @ attr & OPTEE_MSG_ATTR_TYPE_MASK indicates if tmem , rmem or value is used in
* the union . OPTEE_MSG_ATTR_TYPE_VALUE_ * indicates value or octets ,
* OPTEE_MSG_ATTR_TYPE_TMEM_ * indicates @ tmem and
* OPTEE_MSG_ATTR_TYPE_RMEM_ * or the alias PTEE_MSG_ATTR_TYPE_FMEM_ * indicates
* @ rmem or @ fmem depending on the conduit .
* OPTEE_MSG_ATTR_TYPE_NONE indicates that none of the members are used .
*/
struct optee_msg_param {
u64 attr;
union {
struct optee_msg_param_tmem tmem;
struct optee_msg_param_rmem rmem;
struct optee_msg_param_fmem fmem;
struct optee_msg_param_value value;
u8 octets[24 ];
} u;
};
/**
* struct optee_msg_arg - call argument
* @ cmd : Command , one of OPTEE_MSG_CMD_ * or OPTEE_MSG_RPC_CMD_ *
* @ func : Trusted Application function , specific to the Trusted Application ,
* used if cmd = = OPTEE_MSG_CMD_INVOKE_COMMAND
* @ session : In parameter for all OPTEE_MSG_CMD_ * except
* OPTEE_MSG_CMD_OPEN_SESSION where it ' s an output parameter instead
* @ cancel_id : Cancellation id , a unique value to identify this request
* @ ret : return value
* @ ret_origin : origin of the return value
* @ num_params : number of parameters supplied to the OS Command
* @ params : the parameters supplied to the OS Command
*
* All normal calls to Trusted OS uses this struct . If cmd requires further
* information than what these fields hold it can be passed as a parameter
* tagged as meta ( setting the OPTEE_MSG_ATTR_META bit in corresponding
* attrs field ) . All parameters tagged as meta have to come first .
*/
struct optee_msg_arg {
u32 cmd;
u32 func;
u32 session;
u32 cancel_id;
u32 pad;
u32 ret;
u32 ret_origin;
u32 num_params;
/* num_params tells the actual number of element in params */
struct optee_msg_param params[];
};
/**
* OPTEE_MSG_GET_ARG_SIZE - return size of struct optee_msg_arg
*
* @ num_params : Number of parameters embedded in the struct optee_msg_arg
*
* Returns the size of the struct optee_msg_arg together with the number
* of embedded parameters .
*/
#define OPTEE_MSG_GET_ARG_SIZE(num_params) \
(sizeof (struct optee_msg_arg) + \
sizeof (struct optee_msg_param) * (num_params))
/*****************************************************************************
* Part 2 - requests from normal world
*****************************************************************************/
/*
* Return the following UID if using API specified in this file without
* further extensions :
* 384 fb3e0 - e7f8 - 11 e3 - af63 - 0002 a5d5c51b .
* Represented in 4 32 - bit words in OPTEE_MSG_UID_0 , OPTEE_MSG_UID_1 ,
* OPTEE_MSG_UID_2 , OPTEE_MSG_UID_3 .
*
* In the case where the OP - TEE image is loaded by the kernel , this will
* initially return an alternate UID to reflect that we are communicating with
* the TF - A image loading service at that time instead of OP - TEE . That UID is :
* a3fbeab1 - 1246 - 315 d - c7c4 - 06 b9c03cbea4 .
* Represented in 4 32 - bit words in OPTEE_MSG_IMAGE_LOAD_UID_0 ,
* OPTEE_MSG_IMAGE_LOAD_UID_1 , OPTEE_MSG_IMAGE_LOAD_UID_2 ,
* OPTEE_MSG_IMAGE_LOAD_UID_3 .
*/
#define OPTEE_MSG_UID_0 0 x384fb3e0
#define OPTEE_MSG_UID_1 0 xe7f811e3
#define OPTEE_MSG_UID_2 0 xaf630002
#define OPTEE_MSG_UID_3 0 xa5d5c51b
#define OPTEE_MSG_IMAGE_LOAD_UID_0 0 xa3fbeab1
#define OPTEE_MSG_IMAGE_LOAD_UID_1 0 x1246315d
#define OPTEE_MSG_IMAGE_LOAD_UID_2 0 xc7c406b9
#define OPTEE_MSG_IMAGE_LOAD_UID_3 0 xc03cbea4
#define OPTEE_MSG_FUNCID_CALLS_UID 0 xFF01
/*
* Returns 2 . 0 if using API specified in this file without further
* extensions . Represented in 2 32 - bit words in OPTEE_MSG_REVISION_MAJOR
* and OPTEE_MSG_REVISION_MINOR
*/
#define OPTEE_MSG_REVISION_MAJOR 2
#define OPTEE_MSG_REVISION_MINOR 0
#define OPTEE_MSG_FUNCID_CALLS_REVISION 0 xFF03
/*
* Get UUID of Trusted OS .
*
* Used by non - secure world to figure out which Trusted OS is installed .
* Note that returned UUID is the UUID of the Trusted OS , not of the API .
*
* Returns UUID in 4 32 - bit words in the same way as
* OPTEE_MSG_FUNCID_CALLS_UID described above .
*/
#define OPTEE_MSG_OS_OPTEE_UUID_0 0 x486178e0
#define OPTEE_MSG_OS_OPTEE_UUID_1 0 xe7f811e3
#define OPTEE_MSG_OS_OPTEE_UUID_2 0 xbc5e0002
#define OPTEE_MSG_OS_OPTEE_UUID_3 0 xa5d5c51b
#define OPTEE_MSG_FUNCID_GET_OS_UUID 0 x0000
/*
* Get revision of Trusted OS .
*
* Used by non - secure world to figure out which version of the Trusted OS
* is installed . Note that the returned revision is the revision of the
* Trusted OS , not of the API .
*
* Returns revision in 2 32 - bit words in the same way as
* OPTEE_MSG_CALLS_REVISION described above .
*/
#define OPTEE_MSG_FUNCID_GET_OS_REVISION 0 x0001
/*
* Do a secure call with struct optee_msg_arg as argument
* The OPTEE_MSG_CMD_ * below defines what goes in struct optee_msg_arg : : cmd
*
* OPTEE_MSG_CMD_OPEN_SESSION opens a session to a Trusted Application .
* The first two parameters are tagged as meta , holding two value
* parameters to pass the following information :
* param [ 0 ] . u . value . a - b uuid of Trusted Application
* param [ 1 ] . u . value . a - b uuid of Client
* param [ 1 ] . u . value . c Login class of client OPTEE_MSG_LOGIN_ *
*
* OPTEE_MSG_CMD_INVOKE_COMMAND invokes a command a previously opened
* session to a Trusted Application . struct optee_msg_arg : : func is Trusted
* Application function , specific to the Trusted Application .
*
* OPTEE_MSG_CMD_CLOSE_SESSION closes a previously opened session to
* Trusted Application .
*
* OPTEE_MSG_CMD_CANCEL cancels a currently invoked command .
*
* OPTEE_MSG_CMD_REGISTER_SHM registers a shared memory reference . The
* information is passed as :
* [ in ] param [ 0 ] . attr OPTEE_MSG_ATTR_TYPE_TMEM_INPUT
* [ | OPTEE_MSG_ATTR_NONCONTIG ]
* [ in ] param [ 0 ] . u . tmem . buf_ptr physical address ( of first fragment )
* [ in ] param [ 0 ] . u . tmem . size size ( of first fragment )
* [ in ] param [ 0 ] . u . tmem . shm_ref holds shared memory reference
*
* OPTEE_MSG_CMD_UNREGISTER_SHM unregisters a previously registered shared
* memory reference . The information is passed as :
* [ in ] param [ 0 ] . attr OPTEE_MSG_ATTR_TYPE_RMEM_INPUT
* [ in ] param [ 0 ] . u . rmem . shm_ref holds shared memory reference
* [ in ] param [ 0 ] . u . rmem . offs 0
* [ in ] param [ 0 ] . u . rmem . size 0
*
* OPTEE_MSG_CMD_DO_BOTTOM_HALF does the scheduled bottom half processing
* of a driver .
*
* OPTEE_MSG_CMD_STOP_ASYNC_NOTIF informs secure world that from now is
* normal world unable to process asynchronous notifications . Typically
* used when the driver is shut down .
*/
#define OPTEE_MSG_CMD_OPEN_SESSION 0
#define OPTEE_MSG_CMD_INVOKE_COMMAND 1
#define OPTEE_MSG_CMD_CLOSE_SESSION 2
#define OPTEE_MSG_CMD_CANCEL 3
#define OPTEE_MSG_CMD_REGISTER_SHM 4
#define OPTEE_MSG_CMD_UNREGISTER_SHM 5
#define OPTEE_MSG_CMD_DO_BOTTOM_HALF 6
#define OPTEE_MSG_CMD_STOP_ASYNC_NOTIF 7
#define OPTEE_MSG_FUNCID_CALL_WITH_ARG 0 x0004
#endif /* _OPTEE_MSG_H */
Messung V0.5 in Prozent C=94 H=100 G=96
¤ Dauer der Verarbeitung: 0.14 Sekunden
(vorverarbeitet am 2026-10-11)
¤
*© Formatika GbR, Deutschland