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u-boot/include/tee.h
Ilias Apalodimas 2707610eb7 efi_loader: Don't limit the StMM buffer size explicitly 
Currently we allow and explicitly check a single shared page with
StandAloneMM.  This is dictated by OP-TEE which runs the application.
However there's no way for us dynamically discover the number of pages we
are allowed to use.  Since writing big EFI signature list variable
requires more than a page, OP-TEE has bumped the number of shared pages to
four.

Let's remove our explicit check and allow the request to reach OP-TEE even
if it's bigger than what it supports.  There's no need to sanitize the
number of pages internally.  OP-TEE will fail if we try to write more
than it's allowed. The error will just trigger later on,  during the
StMM access.

While at it add an error message to help users figure out what failed.

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Tested-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>

Signed-off-by: Ilias Apalodimas <apalos@gmail.com>
2021-12-31 06:44:29 +01:00

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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2018 Linaro Limited
*/
#ifndef __TEE_H
#define __TEE_H
#include <linux/bitops.h>
#include <linux/list.h>
#define TEE_UUID_LEN 16
#define TEE_GEN_CAP_GP BIT(0) /* GlobalPlatform compliant TEE */
#define TEE_GEN_CAP_REG_MEM BIT(1) /* Supports registering shared memory */
#define TEE_SHM_REGISTER BIT(0) /* In list of shared memory */
#define TEE_SHM_SEC_REGISTER BIT(1) /* TEE notified of this memory */
#define TEE_SHM_ALLOC BIT(2) /* The memory is malloced() and must */
/* be freed() */
#define TEE_PARAM_ATTR_TYPE_NONE 0 /* parameter not used */
#define TEE_PARAM_ATTR_TYPE_VALUE_INPUT 1
#define TEE_PARAM_ATTR_TYPE_VALUE_OUTPUT 2
#define TEE_PARAM_ATTR_TYPE_VALUE_INOUT 3 /* input and output */
#define TEE_PARAM_ATTR_TYPE_MEMREF_INPUT 5
#define TEE_PARAM_ATTR_TYPE_MEMREF_OUTPUT 6
#define TEE_PARAM_ATTR_TYPE_MEMREF_INOUT 7 /* input and output */
#define TEE_PARAM_ATTR_TYPE_MASK 0xff
#define TEE_PARAM_ATTR_META 0x100
#define TEE_PARAM_ATTR_MASK (TEE_PARAM_ATTR_TYPE_MASK | \
TEE_PARAM_ATTR_META)
/*
* Global Platform login identifiers for tee_open_session_arg::clnt_login
*/
#define TEE_LOGIN_PUBLIC 0x00000000
#define TEE_LOGIN_USER 0x00000001
#define TEE_LOGIN_GROUP 0x00000002
#define TEE_LOGIN_APPLICATION 0x00000004
#define TEE_LOGIN_APPLICATION_USER 0x00000005
#define TEE_LOGIN_APPLICATION_GROUP 0x00000006
/*
* Reserve use of GP implementation specific login method range
* (0x80000000 - 0xBFFFFFFF). This range is rather being used
* for REE kernel clients or TEE implementation.
*/
#define TEE_LOGIN_REE_KERNEL_MIN 0x80000000
#define TEE_LOGIN_REE_KERNEL_MAX 0xBFFFFFFF
/* Private login method for REE kernel/privileged clients */
#define TEE_LOGIN_REE_KERNEL 0x80000000
/*
* Some Global Platform error codes which has a meaning if the
* TEE_GEN_CAP_GP bit is returned by the driver in
* struct tee_version_data::gen_caps
*/
#define TEE_SUCCESS 0x00000000
#define TEE_ERROR_STORAGE_NOT_AVAILABLE 0xf0100003
#define TEE_ERROR_GENERIC 0xffff0000
#define TEE_ERROR_EXCESS_DATA 0xffff0004
#define TEE_ERROR_BAD_PARAMETERS 0xffff0006
#define TEE_ERROR_ITEM_NOT_FOUND 0xffff0008
#define TEE_ERROR_NOT_IMPLEMENTED 0xffff0009
#define TEE_ERROR_NOT_SUPPORTED 0xffff000a
#define TEE_ERROR_COMMUNICATION 0xffff000e
#define TEE_ERROR_SECURITY 0xffff000f
#define TEE_ERROR_SHORT_BUFFER 0xffff0010
#define TEE_ERROR_OUT_OF_MEMORY 0xffff000c
#define TEE_ERROR_OVERFLOW 0xffff300f
#define TEE_ERROR_TARGET_DEAD 0xffff3024
#define TEE_ERROR_STORAGE_NO_SPACE 0xffff3041
#define TEE_ORIGIN_COMMS 0x00000002
#define TEE_ORIGIN_TEE 0x00000003
#define TEE_ORIGIN_TRUSTED_APP 0x00000004
struct udevice;
/**
* struct tee_optee_ta_uuid - OP-TEE Trusted Application (TA) UUID format
*
* Used to identify an OP-TEE TA and define suitable to initialize structs
* of this format is distributed with the interface of the TA. The
* individual fields of this struct doesn't have any special meaning in
* OP-TEE. See RFC4122 for details on the format.
*/
struct tee_optee_ta_uuid {
u32 time_low;
u16 time_mid;
u16 time_hi_and_version;
u8 clock_seq_and_node[8];
};
/**
* struct tee_shm - memory shared with the TEE
* @dev: The TEE device
* @link: List node in the list in struct struct tee_uclass_priv
* @addr: Pointer to the shared memory
* @size: Size of the the shared memory
* @flags: TEE_SHM_* above
*/
struct tee_shm {
struct udevice *dev;
struct list_head link;
void *addr;
ulong size;
u32 flags;
};
/**
* struct tee_param_memref - memory reference for a Trusted Application
* @shm_offs: Offset in bytes into the shared memory object @shm
* @size: Size in bytes of the memory reference
* @shm: Pointer to a shared memory object for the buffer
*
* Used as a part of struct tee_param, see that for more information.
*/
struct tee_param_memref {
ulong shm_offs;
ulong size;
struct tee_shm *shm;
};
/**
* struct tee_param_value - value parameter for a Trusted Application
* @a, @b, @c: Parameters passed by value
*
* Used as a part of struct tee_param, see that for more information.
*/
struct tee_param_value {
u64 a;
u64 b;
u64 c;
};
/**
* struct tee_param - invoke parameter for a Trusted Application
* @attr: Attributes
* @u.memref: Memref parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
* TEE_PARAM_ATTR_TYPE_MEMREF_* above
* @u.value: Value parameter if (@attr & TEE_PARAM_ATTR_MASK) is one of
* TEE_PARAM_ATTR_TYPE_VALUE_* above
*
* Parameters to TA are passed using an array of this struct, for
* flexibility both value parameters and memory refereces can be used.
*/
struct tee_param {
u64 attr;
union {
struct tee_param_memref memref;
struct tee_param_value value;
} u;
};
/**
* struct tee_open_session_arg - extra arguments for tee_open_session()
* @uuid: [in] UUID of the Trusted Application
* @clnt_uuid: [in] UUID of client, zeroes for PUBLIC/REE_KERNEL
* @clnt_login: [in] Class of client TEE_LOGIN_*
* @session: [out] Session id
* @ret: [out] return value
* @ret_origin: [out] origin of the return value
*/
struct tee_open_session_arg {
u8 uuid[TEE_UUID_LEN];
u8 clnt_uuid[TEE_UUID_LEN];
u32 clnt_login;
u32 session;
u32 ret;
u32 ret_origin;
};
/**
* struct tee_invoke_arg - extra arguments for tee_invoke_func()
* @func: [in] Trusted Application function, specific to the TA
* @session: [in] Session id, from open session
* @ret: [out] return value
* @ret_origin: [out] origin of the return value
*/
struct tee_invoke_arg {
u32 func;
u32 session;
u32 ret;
u32 ret_origin;
};
/**
* struct tee_version_data - description of TEE
* @gen_caps: Generic capabilities, TEE_GEN_CAP_* above
*/
struct tee_version_data {
u32 gen_caps;
};
/**
* struct tee_driver_ops - TEE driver operations
* @get_version: Query capabilities of TEE device,
* @open_session: Opens a session to a Trusted Application in the TEE,
* @close_session: Closes a session to Trusted Application,
* @invoke_func: Invokes a function in a Trusted Application,
* @shm_register: Registers memory shared with the TEE
* @shm_unregister: Unregisters memory shared with the TEE
*/
struct tee_driver_ops {
/**
* get_version() - Query capabilities of TEE device
* @dev: The TEE device
* @vers: Pointer to version data
*/
void (*get_version)(struct udevice *dev, struct tee_version_data *vers);
/**
* open_session() - Open a session to a Trusted Application
* @dev: The TEE device
* @arg: Open session arguments
* @num_param: Number of elements in @param
* @param: Parameters for Trusted Application
*
* Returns < 0 on error else see @arg->ret for result. If @arg->ret is
* TEE_SUCCESS the session identifier is available in @arg->session.
*/
int (*open_session)(struct udevice *dev,
struct tee_open_session_arg *arg, uint num_param,
struct tee_param *param);
/**
* close_session() - Close a session to a Trusted Application
* @dev: The TEE device
* @session: Session id
*
* Return < 0 on error else 0, regardless the session will not be valid
* after this function has returned.
*/
int (*close_session)(struct udevice *dev, u32 session);
/**
* tee_invoke_func() - Invoke a function in a Trusted Application
* @dev: The TEE device
* @arg: Invoke arguments
* @num_param: Number of elements in @param
* @param: Parameters for Trusted Application
*
* Returns < 0 on error else see @arg->ret for result.
*/
int (*invoke_func)(struct udevice *dev, struct tee_invoke_arg *arg,
uint num_param, struct tee_param *param);
/**
* shm_register() - Registers memory shared with the TEE
* @dev: The TEE device
* @shm: Pointer to a shared memory object
* Returns 0 on success or < 0 on failure.
*/
int (*shm_register)(struct udevice *dev, struct tee_shm *shm);
/**
* shm_unregister() - Unregisters memory shared with the TEE
* @dev: The TEE device
* @shm: Pointer to a shared memory object
* Returns 0 on success or < 0 on failure.
*/
int (*shm_unregister)(struct udevice *dev, struct tee_shm *shm);
};
/**
* __tee_shm_add() - Internal helper function to register shared memory
* @dev: The TEE device
* @align: Required alignment of allocated memory block if
* (@flags & TEE_SHM_ALLOC)
* @addr: Address of memory block, ignored if (@flags & TEE_SHM_ALLOC)
* @size: Size of memory block
* @flags: TEE_SHM_* above
* @shmp: If the function return 0, this holds the allocated
* struct tee_shm
*
* returns 0 on success or < 0 on failure.
*/
int __tee_shm_add(struct udevice *dev, ulong align, void *addr, ulong size,
u32 flags, struct tee_shm **shmp);
/**
* tee_shm_alloc() - Allocate shared memory
* @dev: The TEE device
* @size: Size of memory block
* @flags: TEE_SHM_* above
* @shmp: If the function return 0, this holds the allocated
* struct tee_shm
*
* returns 0 on success or < 0 on failure.
*/
int tee_shm_alloc(struct udevice *dev, ulong size, u32 flags,
struct tee_shm **shmp);
/**
* tee_shm_register() - Registers shared memory
* @dev: The TEE device
* @addr: Address of memory block
* @size: Size of memory block
* @flags: TEE_SHM_* above
* @shmp: If the function return 0, this holds the allocated
* struct tee_shm
*
* returns 0 on success or < 0 on failure.
*/
int tee_shm_register(struct udevice *dev, void *addr, ulong size, u32 flags,
struct tee_shm **shmp);
/**
* tee_shm_free() - Frees shared memory
* @shm: Shared memory object
*/
void tee_shm_free(struct tee_shm *shm);
/**
* tee_shm_is_registered() - Check register status of shared memory object
* @shm: Pointer to shared memory object
* @dev: The TEE device
*
* Returns true if the shared memory object is registered for the supplied
* TEE device
*/
bool tee_shm_is_registered(struct tee_shm *shm, struct udevice *dev);
/**
* tee_find_device() - Look up a TEE device
* @start: if not NULL, continue search after this device
* @match: function to check TEE device, returns != 0 if the device
* matches
* @data: data for match function
* @vers: if not NULL, version data of TEE device of the device returned
*
* Returns a probed TEE device of the first TEE device matched by the
* match() callback or NULL.
*/
#if CONFIG_IS_ENABLED(TEE)
struct udevice *tee_find_device(struct udevice *start,
int (*match)(struct tee_version_data *vers,
const void *data),
const void *data,
struct tee_version_data *vers);
#else
static inline struct udevice *tee_find_device(struct udevice *start,
int (*match)(struct tee_version_data *vers,
const void *data),
const void *data,
struct tee_version_data *vers)
{
return NULL;
}
#endif
/**
* tee_get_version() - Query capabilities of TEE device
* @dev: The TEE device
* @vers: Pointer to version data
*/
void tee_get_version(struct udevice *dev, struct tee_version_data *vers);
/**
* tee_open_session() - Open a session to a Trusted Application
* @dev: The TEE device
* @arg: Open session arguments
* @num_param: Number of elements in @param
* @param: Parameters for Trusted Application
*
* Returns < 0 on error else see @arg->ret for result. If @arg->ret is
* TEE_SUCCESS the session identifier is available in @arg->session.
*/
int tee_open_session(struct udevice *dev, struct tee_open_session_arg *arg,
uint num_param, struct tee_param *param);
/**
* tee_close_session() - Close a session to a Trusted Application
* @dev: The TEE device
* @session: Session id
*
* Return < 0 on error else 0, regardless the session will not be valid
* after this function has returned.
*/
int tee_close_session(struct udevice *dev, u32 session);
/**
* tee_invoke_func() - Invoke a function in a Trusted Application
* @dev: The TEE device
* @arg: Invoke arguments
* @num_param: Number of elements in @param
* @param: Parameters for Trusted Application
*
* Returns < 0 on error else see @arg->ret for result.
*/
int tee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg,
uint num_param, struct tee_param *param);
/**
* tee_optee_ta_uuid_from_octets() - Converts to struct tee_optee_ta_uuid
* @d: Destination struct
* @s: Source UUID octets
*
* Conversion to a struct tee_optee_ta_uuid represantion from binary octet
* representation.
*/
void tee_optee_ta_uuid_from_octets(struct tee_optee_ta_uuid *d,
const u8 s[TEE_UUID_LEN]);
/**
* tee_optee_ta_uuid_to_octets() - Converts from struct tee_optee_ta_uuid
* @d: Destination UUID octets
* @s: Source struct
*
* Conversion from a struct tee_optee_ta_uuid represantion to binary octet
* representation.
*/
void tee_optee_ta_uuid_to_octets(u8 d[TEE_UUID_LEN],
const struct tee_optee_ta_uuid *s);
/**
* tee_flush_all_shm_dcache() - Flush data cache for all shared memories
* @dev: The TEE device
*/
void tee_flush_all_shm_dcache(struct udevice *dev);
#endif /* __TEE_H */
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