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tee: add TEE_IOCTL_PARAM_ATTR_TYPE_OBJREF

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The TEE subsystem allows session-based access to trusted services,
requiring a session to be established to receive a service. This
is not suitable for an environment that represents services as objects.
An object supports various operations that a client can invoke,
potentially generating a result or a new object that can be invoked
independently of the original object.

Add TEE_IOCTL_PARAM_ATTR_TYPE_OBJREF_INPUT/OUTPUT/INOUT to represent an
object. Objects may reside in either TEE or userspace. To invoke an
object in TEE, introduce a new ioctl. Use the existing SUPPL_RECV and
SUPPL_SEND to invoke an object in userspace.

Reviewed-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: Harshal Dev <quic_hdev@quicinc.com>
Signed-off-by: Amirreza Zarrabi <amirreza.zarrabi@oss.qualcomm.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
This commit is contained in:
Amirreza Zarrabi
2025-09-11 21:07:45 -07:00
committed by Jens Wiklander
parent 54a53e95a9
commit d5b8b0fa17
4 changed files with 130 additions and 6 deletions
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41
include/uapi/linux/tee.h
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@@ -48,8 +48,10 @@
#define TEE_GEN_CAP_PRIVILEGED (1 << 1)/* Privileged device (for supplicant) */
#define TEE_GEN_CAP_REG_MEM (1 << 2)/* Supports registering shared memory */
#define TEE_GEN_CAP_MEMREF_NULL (1 << 3)/* NULL MemRef support */
#define TEE_GEN_CAP_OBJREF (1 << 4)/* Supports generic object reference */
#define TEE_MEMREF_NULL (__u64)(-1) /* NULL MemRef Buffer */
#define TEE_MEMREF_NULL ((__u64)(-1)) /* NULL MemRef Buffer */
#define TEE_OBJREF_NULL ((__u64)(-1)) /* NULL ObjRef Object */
/*
* TEE Implementation ID
@@ -158,6 +160,13 @@ struct tee_ioctl_buf_data {
#define TEE_IOCTL_PARAM_ATTR_TYPE_UBUF_OUTPUT 9
#define TEE_IOCTL_PARAM_ATTR_TYPE_UBUF_INOUT 10 /* input and output */
/*
* These defines object reference parameters.
*/
#define TEE_IOCTL_PARAM_ATTR_TYPE_OBJREF_INPUT 11
#define TEE_IOCTL_PARAM_ATTR_TYPE_OBJREF_OUTPUT 12
#define TEE_IOCTL_PARAM_ATTR_TYPE_OBJREF_INOUT 13
/*
* Mask for the type part of the attribute, leaves room for more types
*/
@@ -195,15 +204,16 @@ struct tee_ioctl_buf_data {
* @attr: attributes
* @a: if a memref, offset into the shared memory object,
* else if a ubuf, address of the user buffer,
* else a value parameter
* @b: if a memref or ubuf, size of the buffer, else a value parameter
* else if an objref, object identifier, else a value parameter
* @b: if a memref or ubuf, size of the buffer,
* else if objref, flags for the object, else a value parameter
* @c: if a memref, shared memory identifier, else a value parameter
*
* @attr & TEE_PARAM_ATTR_TYPE_MASK indicates if memref, ubuf, or value is
* used in the union. TEE_PARAM_ATTR_TYPE_VALUE_* indicates value,
* TEE_PARAM_ATTR_TYPE_MEMREF_* indicates memref, and TEE_PARAM_ATTR_TYPE_UBUF_*
* indicates ubuf. TEE_PARAM_ATTR_TYPE_NONE indicates that none of the members
* are used.
* TEE_PARAM_ATTR_TYPE_MEMREF_* indicates memref, TEE_PARAM_ATTR_TYPE_UBUF_*
* indicates ubuf, and TEE_PARAM_ATTR_TYPE_OBJREF_* indicates objref.
* TEE_PARAM_ATTR_TYPE_NONE indicates that none of the members are used.
*
* Shared memory is allocated with TEE_IOC_SHM_ALLOC which returns an
* identifier representing the shared memory object. A memref can reference
@@ -442,4 +452,23 @@ struct tee_ioctl_shm_register_fd_data {
* munmap(): unmaps previously shared memory
*/
/**
* struct tee_ioctl_invoke_func_arg - Invokes an object in a Trusted Application
* @id: [in] Object id
* @op: [in] Object operation, specific to the object
* @ret: [out] return value
* @num_params: [in] number of parameters following this struct
*/
struct tee_ioctl_object_invoke_arg {
__u64 id;
__u32 op;
__u32 ret;
__u32 num_params;
/* num_params tells the actual number of element in params */
struct tee_ioctl_param params[];
};
#define TEE_IOC_OBJECT_INVOKE _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 10, \
struct tee_ioctl_buf_data)
#endif /*__TEE_H*/