mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 23:47:24 +00:00
d4bd3d25d8
Adds a OP-TEE driver. * Targets ARM and ARM64 * Supports using any U-Boot memory as shared memory * Probes OP-TEE version using SMCs * Uses OPTEE message protocol version 2 to communicate with secure world Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Igor Opaniuk <igor.opaniuk@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
450 lines
14 KiB
C
450 lines
14 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
|
|
/*
|
|
* Copyright (c) 2015-2018, Linaro Limited
|
|
*/
|
|
|
|
#ifndef OPTEE_SMC_H
|
|
#define OPTEE_SMC_H
|
|
|
|
#include <linux/arm-smccc.h>
|
|
#include <linux/bitops.h>
|
|
|
|
/*
|
|
* This file is based on
|
|
* https://github.com/OP-TEE/optee_os/blob/master/core/arch/arm/include/sm/optee_smc.h
|
|
* and may need to be updated when introducing new features.
|
|
*/
|
|
|
|
#define OPTEE_SMC_STD_CALL_VAL(func_num) \
|
|
ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_32, \
|
|
ARM_SMCCC_OWNER_TRUSTED_OS, (func_num))
|
|
#define OPTEE_SMC_FAST_CALL_VAL(func_num) \
|
|
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
|
|
ARM_SMCCC_OWNER_TRUSTED_OS, (func_num))
|
|
|
|
/*
|
|
* Function specified by SMC Calling convention.
|
|
*/
|
|
#define OPTEE_SMC_FUNCID_CALLS_COUNT 0xFF00
|
|
#define OPTEE_SMC_CALLS_COUNT \
|
|
ARM_SMCCC_CALL_VAL(OPTEE_SMC_FAST_CALL, SMCCC_SMC_32, \
|
|
SMCCC_OWNER_TRUSTED_OS_END, \
|
|
OPTEE_SMC_FUNCID_CALLS_COUNT)
|
|
|
|
/*
|
|
* Normal cached memory (write-back), shareable for SMP systems and not
|
|
* shareable for UP systems.
|
|
*/
|
|
#define OPTEE_SMC_SHM_CACHED 1
|
|
|
|
/*
|
|
* a0..a7 is used as register names in the descriptions below, on arm32
|
|
* that translates to r0..r7 and on arm64 to w0..w7. In both cases it's
|
|
* 32-bit registers.
|
|
*/
|
|
|
|
/*
|
|
* Function specified by SMC Calling convention
|
|
*
|
|
* Return one of the following UIDs if using API specified in this file
|
|
* without further extentions:
|
|
* 65cb6b93-af0c-4617-8ed6-644a8d1140f8
|
|
* see also OPTEE_SMC_UID_* in optee_msg.h
|
|
*/
|
|
#define OPTEE_SMC_FUNCID_CALLS_UID OPTEE_MSG_FUNCID_CALLS_UID
|
|
#define OPTEE_SMC_CALLS_UID \
|
|
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
|
|
ARM_SMCCC_OWNER_TRUSTED_OS_END, \
|
|
OPTEE_SMC_FUNCID_CALLS_UID)
|
|
|
|
/*
|
|
* Function specified by SMC Calling convention
|
|
*
|
|
* Returns 2.0 if using API specified in this file without further extentions.
|
|
* see also OPTEE_MSG_REVISION_* in optee_msg.h
|
|
*/
|
|
#define OPTEE_SMC_FUNCID_CALLS_REVISION OPTEE_MSG_FUNCID_CALLS_REVISION
|
|
#define OPTEE_SMC_CALLS_REVISION \
|
|
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
|
|
ARM_SMCCC_OWNER_TRUSTED_OS_END, \
|
|
OPTEE_SMC_FUNCID_CALLS_REVISION)
|
|
|
|
struct optee_smc_calls_revision_result {
|
|
unsigned long major;
|
|
unsigned long minor;
|
|
unsigned long reserved0;
|
|
unsigned long reserved1;
|
|
};
|
|
|
|
/*
|
|
* 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 a0-4 in the same way as OPTEE_SMC_CALLS_UID
|
|
* described above.
|
|
*/
|
|
#define OPTEE_SMC_FUNCID_GET_OS_UUID OPTEE_MSG_FUNCID_GET_OS_UUID
|
|
#define OPTEE_SMC_CALL_GET_OS_UUID \
|
|
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_OS_UUID)
|
|
|
|
/*
|
|
* 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 a0-1 in the same way as OPTEE_SMC_CALLS_REVISION
|
|
* described above. May optionally return a 32-bit build identifier in a2,
|
|
* with zero meaning unspecified.
|
|
*/
|
|
#define OPTEE_SMC_FUNCID_GET_OS_REVISION OPTEE_MSG_FUNCID_GET_OS_REVISION
|
|
#define OPTEE_SMC_CALL_GET_OS_REVISION \
|
|
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_OS_REVISION)
|
|
|
|
struct optee_smc_call_get_os_revision_result {
|
|
unsigned long major;
|
|
unsigned long minor;
|
|
unsigned long build_id;
|
|
unsigned long reserved1;
|
|
};
|
|
|
|
/*
|
|
* Call with struct optee_msg_arg as argument
|
|
*
|
|
* Call register usage:
|
|
* a0 SMC Function ID, OPTEE_SMC*CALL_WITH_ARG
|
|
* a1 Upper 32bit of a 64bit physical pointer to a struct optee_msg_arg
|
|
* a2 Lower 32bit of a 64bit physical pointer to a struct optee_msg_arg
|
|
* a3 Cache settings, not used if physical pointer is in a predefined shared
|
|
* memory area else per OPTEE_SMC_SHM_*
|
|
* a4-6 Not used
|
|
* a7 Hypervisor Client ID register
|
|
*
|
|
* Normal return register usage:
|
|
* a0 Return value, OPTEE_SMC_RETURN_*
|
|
* a1-3 Not used
|
|
* a4-7 Preserved
|
|
*
|
|
* OPTEE_SMC_RETURN_ETHREAD_LIMIT return register usage:
|
|
* a0 Return value, OPTEE_SMC_RETURN_ETHREAD_LIMIT
|
|
* a1-3 Preserved
|
|
* a4-7 Preserved
|
|
*
|
|
* RPC return register usage:
|
|
* a0 Return value, OPTEE_SMC_RETURN_IS_RPC(val)
|
|
* a1-2 RPC parameters
|
|
* a3-7 Resume information, must be preserved
|
|
*
|
|
* Possible return values:
|
|
* OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this
|
|
* function.
|
|
* OPTEE_SMC_RETURN_OK Call completed, result updated in
|
|
* the previously supplied struct
|
|
* optee_msg_arg.
|
|
* OPTEE_SMC_RETURN_ETHREAD_LIMIT Number of Trusted OS threads exceeded,
|
|
* try again later.
|
|
* OPTEE_SMC_RETURN_EBADADDR Bad physcial pointer to struct
|
|
* optee_msg_arg.
|
|
* OPTEE_SMC_RETURN_EBADCMD Bad/unknown cmd in struct optee_msg_arg
|
|
* OPTEE_SMC_RETURN_IS_RPC() Call suspended by RPC call to normal
|
|
* world.
|
|
*/
|
|
#define OPTEE_SMC_FUNCID_CALL_WITH_ARG OPTEE_MSG_FUNCID_CALL_WITH_ARG
|
|
#define OPTEE_SMC_CALL_WITH_ARG \
|
|
OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_CALL_WITH_ARG)
|
|
|
|
/*
|
|
* Get Shared Memory Config
|
|
*
|
|
* Returns the Secure/Non-secure shared memory config.
|
|
*
|
|
* Call register usage:
|
|
* a0 SMC Function ID, OPTEE_SMC_GET_SHM_CONFIG
|
|
* a1-6 Not used
|
|
* a7 Hypervisor Client ID register
|
|
*
|
|
* Have config return register usage:
|
|
* a0 OPTEE_SMC_RETURN_OK
|
|
* a1 Physical address of start of SHM
|
|
* a2 Size of of SHM
|
|
* a3 Cache settings of memory, as defined by the
|
|
* OPTEE_SMC_SHM_* values above
|
|
* a4-7 Preserved
|
|
*
|
|
* Not available register usage:
|
|
* a0 OPTEE_SMC_RETURN_ENOTAVAIL
|
|
* a1-3 Not used
|
|
* a4-7 Preserved
|
|
*/
|
|
#define OPTEE_SMC_FUNCID_GET_SHM_CONFIG 7
|
|
#define OPTEE_SMC_GET_SHM_CONFIG \
|
|
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_SHM_CONFIG)
|
|
|
|
struct optee_smc_get_shm_config_result {
|
|
unsigned long status;
|
|
unsigned long start;
|
|
unsigned long size;
|
|
unsigned long settings;
|
|
};
|
|
|
|
/*
|
|
* Exchanges capabilities between normal world and secure world
|
|
*
|
|
* Call register usage:
|
|
* a0 SMC Function ID, OPTEE_SMC_EXCHANGE_CAPABILITIES
|
|
* a1 bitfield of normal world capabilities OPTEE_SMC_NSEC_CAP_*
|
|
* a2-6 Not used
|
|
* a7 Hypervisor Client ID register
|
|
*
|
|
* Normal return register usage:
|
|
* a0 OPTEE_SMC_RETURN_OK
|
|
* a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_*
|
|
* a2-7 Preserved
|
|
*
|
|
* Error return register usage:
|
|
* a0 OPTEE_SMC_RETURN_ENOTAVAIL, can't use the capabilities from normal world
|
|
* a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_*
|
|
* a2-7 Preserved
|
|
*/
|
|
/* Normal world works as a uniprocessor system */
|
|
#define OPTEE_SMC_NSEC_CAP_UNIPROCESSOR BIT(0)
|
|
/* Secure world has reserved shared memory for normal world to use */
|
|
#define OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM BIT(0)
|
|
/* Secure world can communicate via previously unregistered shared memory */
|
|
#define OPTEE_SMC_SEC_CAP_UNREGISTERED_SHM BIT(1)
|
|
|
|
/*
|
|
* Secure world supports commands "register/unregister shared memory",
|
|
* secure world accepts command buffers located in any parts of non-secure RAM
|
|
*/
|
|
#define OPTEE_SMC_SEC_CAP_DYNAMIC_SHM BIT(2)
|
|
|
|
#define OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES 9
|
|
#define OPTEE_SMC_EXCHANGE_CAPABILITIES \
|
|
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES)
|
|
|
|
struct optee_smc_exchange_capabilities_result {
|
|
unsigned long status;
|
|
unsigned long capabilities;
|
|
unsigned long reserved0;
|
|
unsigned long reserved1;
|
|
};
|
|
|
|
/*
|
|
* Disable and empties cache of shared memory objects
|
|
*
|
|
* Secure world can cache frequently used shared memory objects, for
|
|
* example objects used as RPC arguments. When secure world is idle this
|
|
* function returns one shared memory reference to free. To disable the
|
|
* cache and free all cached objects this function has to be called until
|
|
* it returns OPTEE_SMC_RETURN_ENOTAVAIL.
|
|
*
|
|
* Call register usage:
|
|
* a0 SMC Function ID, OPTEE_SMC_DISABLE_SHM_CACHE
|
|
* a1-6 Not used
|
|
* a7 Hypervisor Client ID register
|
|
*
|
|
* Normal return register usage:
|
|
* a0 OPTEE_SMC_RETURN_OK
|
|
* a1 Upper 32bit of a 64bit Shared memory cookie
|
|
* a2 Lower 32bit of a 64bit Shared memory cookie
|
|
* a3-7 Preserved
|
|
*
|
|
* Cache empty return register usage:
|
|
* a0 OPTEE_SMC_RETURN_ENOTAVAIL
|
|
* a1-7 Preserved
|
|
*
|
|
* Not idle return register usage:
|
|
* a0 OPTEE_SMC_RETURN_EBUSY
|
|
* a1-7 Preserved
|
|
*/
|
|
#define OPTEE_SMC_FUNCID_DISABLE_SHM_CACHE 10
|
|
#define OPTEE_SMC_DISABLE_SHM_CACHE \
|
|
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_DISABLE_SHM_CACHE)
|
|
|
|
struct optee_smc_disable_shm_cache_result {
|
|
unsigned long status;
|
|
unsigned long shm_upper32;
|
|
unsigned long shm_lower32;
|
|
unsigned long reserved0;
|
|
};
|
|
|
|
/*
|
|
* Enable cache of shared memory objects
|
|
*
|
|
* Secure world can cache frequently used shared memory objects, for
|
|
* example objects used as RPC arguments. When secure world is idle this
|
|
* function returns OPTEE_SMC_RETURN_OK and the cache is enabled. If
|
|
* secure world isn't idle OPTEE_SMC_RETURN_EBUSY is returned.
|
|
*
|
|
* Call register usage:
|
|
* a0 SMC Function ID, OPTEE_SMC_ENABLE_SHM_CACHE
|
|
* a1-6 Not used
|
|
* a7 Hypervisor Client ID register
|
|
*
|
|
* Normal return register usage:
|
|
* a0 OPTEE_SMC_RETURN_OK
|
|
* a1-7 Preserved
|
|
*
|
|
* Not idle return register usage:
|
|
* a0 OPTEE_SMC_RETURN_EBUSY
|
|
* a1-7 Preserved
|
|
*/
|
|
#define OPTEE_SMC_FUNCID_ENABLE_SHM_CACHE 11
|
|
#define OPTEE_SMC_ENABLE_SHM_CACHE \
|
|
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_ENABLE_SHM_CACHE)
|
|
|
|
/*
|
|
* Resume from RPC (for example after processing a foreign interrupt)
|
|
*
|
|
* Call register usage:
|
|
* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC
|
|
* a1-3 Value of a1-3 when OPTEE_SMC_CALL_WITH_ARG returned
|
|
* OPTEE_SMC_RETURN_RPC in a0
|
|
*
|
|
* Return register usage is the same as for OPTEE_SMC_*CALL_WITH_ARG above.
|
|
*
|
|
* Possible return values
|
|
* OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this
|
|
* function.
|
|
* OPTEE_SMC_RETURN_OK Original call completed, result
|
|
* updated in the previously supplied.
|
|
* struct optee_msg_arg
|
|
* OPTEE_SMC_RETURN_RPC Call suspended by RPC call to normal
|
|
* world.
|
|
* OPTEE_SMC_RETURN_ERESUME Resume failed, the opaque resume
|
|
* information was corrupt.
|
|
*/
|
|
#define OPTEE_SMC_FUNCID_RETURN_FROM_RPC 3
|
|
#define OPTEE_SMC_CALL_RETURN_FROM_RPC \
|
|
OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_RETURN_FROM_RPC)
|
|
|
|
#define OPTEE_SMC_RETURN_RPC_PREFIX_MASK 0xFFFF0000
|
|
#define OPTEE_SMC_RETURN_RPC_PREFIX 0xFFFF0000
|
|
#define OPTEE_SMC_RETURN_RPC_FUNC_MASK 0x0000FFFF
|
|
|
|
#define OPTEE_SMC_RETURN_GET_RPC_FUNC(ret) \
|
|
((ret) & OPTEE_SMC_RETURN_RPC_FUNC_MASK)
|
|
|
|
#define OPTEE_SMC_RPC_VAL(func) ((func) | OPTEE_SMC_RETURN_RPC_PREFIX)
|
|
|
|
/*
|
|
* Allocate memory for RPC parameter passing. The memory is used to hold a
|
|
* struct optee_msg_arg.
|
|
*
|
|
* "Call" register usage:
|
|
* a0 This value, OPTEE_SMC_RETURN_RPC_ALLOC
|
|
* a1 Size in bytes of required argument memory
|
|
* a2 Not used
|
|
* a3 Resume information, must be preserved
|
|
* a4-5 Not used
|
|
* a6-7 Resume information, must be preserved
|
|
*
|
|
* "Return" register usage:
|
|
* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
|
|
* a1 Upper 32bits of 64bit physical pointer to allocated
|
|
* memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't
|
|
* be allocated.
|
|
* a2 Lower 32bits of 64bit physical pointer to allocated
|
|
* memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't
|
|
* be allocated
|
|
* a3 Preserved
|
|
* a4 Upper 32bits of 64bit Shared memory cookie used when freeing
|
|
* the memory or doing an RPC
|
|
* a5 Lower 32bits of 64bit Shared memory cookie used when freeing
|
|
* the memory or doing an RPC
|
|
* a6-7 Preserved
|
|
*/
|
|
#define OPTEE_SMC_RPC_FUNC_ALLOC 0
|
|
#define OPTEE_SMC_RETURN_RPC_ALLOC \
|
|
OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_ALLOC)
|
|
|
|
/*
|
|
* Free memory previously allocated by OPTEE_SMC_RETURN_RPC_ALLOC
|
|
*
|
|
* "Call" register usage:
|
|
* a0 This value, OPTEE_SMC_RETURN_RPC_FREE
|
|
* a1 Upper 32bits of 64bit shared memory cookie belonging to this
|
|
* argument memory
|
|
* a2 Lower 32bits of 64bit shared memory cookie belonging to this
|
|
* argument memory
|
|
* a3-7 Resume information, must be preserved
|
|
*
|
|
* "Return" register usage:
|
|
* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
|
|
* a1-2 Not used
|
|
* a3-7 Preserved
|
|
*/
|
|
#define OPTEE_SMC_RPC_FUNC_FREE 2
|
|
#define OPTEE_SMC_RETURN_RPC_FREE \
|
|
OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_FREE)
|
|
|
|
/*
|
|
* Deliver foreign interrupt to normal world.
|
|
*
|
|
* "Call" register usage:
|
|
* a0 OPTEE_SMC_RETURN_RPC_FOREIGN_INTR
|
|
* a1-7 Resume information, must be preserved
|
|
*
|
|
* "Return" register usage:
|
|
* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
|
|
* a1-7 Preserved
|
|
*/
|
|
#define OPTEE_SMC_RPC_FUNC_FOREIGN_INTR 4
|
|
#define OPTEE_SMC_RETURN_RPC_FOREIGN_INTR \
|
|
OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_FOREIGN_INTR)
|
|
|
|
/*
|
|
* Do an RPC request. The supplied struct optee_msg_arg tells which
|
|
* request to do and the parameters for the request. The following fields
|
|
* are used (the rest are unused):
|
|
* - cmd the Request ID
|
|
* - ret return value of the request, filled in by normal world
|
|
* - num_params number of parameters for the request
|
|
* - params the parameters
|
|
* - param_attrs attributes of the parameters
|
|
*
|
|
* "Call" register usage:
|
|
* a0 OPTEE_SMC_RETURN_RPC_CMD
|
|
* a1 Upper 32bit of a 64bit Shared memory cookie holding a
|
|
* struct optee_msg_arg, must be preserved, only the data should
|
|
* be updated
|
|
* a2 Lower 32bit of a 64bit Shared memory cookie holding a
|
|
* struct optee_msg_arg, must be preserved, only the data should
|
|
* be updated
|
|
* a3-7 Resume information, must be preserved
|
|
*
|
|
* "Return" register usage:
|
|
* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
|
|
* a1-2 Not used
|
|
* a3-7 Preserved
|
|
*/
|
|
#define OPTEE_SMC_RPC_FUNC_CMD 5
|
|
#define OPTEE_SMC_RETURN_RPC_CMD \
|
|
OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_CMD)
|
|
|
|
/* Returned in a0 */
|
|
#define OPTEE_SMC_RETURN_UNKNOWN_FUNCTION 0xFFFFFFFF
|
|
|
|
/* Returned in a0 only from Trusted OS functions */
|
|
#define OPTEE_SMC_RETURN_OK 0x0
|
|
#define OPTEE_SMC_RETURN_ETHREAD_LIMIT 0x1
|
|
#define OPTEE_SMC_RETURN_EBUSY 0x2
|
|
#define OPTEE_SMC_RETURN_ERESUME 0x3
|
|
#define OPTEE_SMC_RETURN_EBADADDR 0x4
|
|
#define OPTEE_SMC_RETURN_EBADCMD 0x5
|
|
#define OPTEE_SMC_RETURN_ENOMEM 0x6
|
|
#define OPTEE_SMC_RETURN_ENOTAVAIL 0x7
|
|
#define OPTEE_SMC_RETURN_IS_RPC(ret) __optee_smc_return_is_rpc((ret))
|
|
|
|
static inline bool __optee_smc_return_is_rpc(u32 ret)
|
|
{
|
|
return ret != OPTEE_SMC_RETURN_UNKNOWN_FUNCTION &&
|
|
(ret & OPTEE_SMC_RETURN_RPC_PREFIX_MASK) ==
|
|
OPTEE_SMC_RETURN_RPC_PREFIX;
|
|
}
|
|
|
|
#endif /* OPTEE_SMC_H */
|