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| author |   Volodymyr Babchuk <vlad.babchuk@gmail.com> | 2017-11-29 14:48:31 +0200 |
|---|---|---|
| committer |   Jens Wiklander <jens.wiklander@linaro.org> | 2017-12-15 13:32:32 +0100 |
| commit | 06ca79179c4e00efe53cfe43456f1586f944f04f (patch) | |
| tree | 1a2c1887556a988634c5392123c338155e615c7f /drivers/tee/optee/optee_private.h | |
| parent | tee: optee: add page list manipulation functions (diff) | |
| download | linux-dev-06ca79179c4e00efe53cfe43456f1586f944f04f.tar.xz linux-dev-06ca79179c4e00efe53cfe43456f1586f944f04f.zip | |
tee: optee: add shared buffer registration functions
This change adds ops for shm_(un)register functions in tee interface.
Client application can use these functions to (un)register an own shared
buffer in OP-TEE address space. This allows zero copy data sharing between
Normal and Secure Worlds.
Please note that while those functions were added to optee code,
it does not report to userspace that those functions are available.
OP-TEE code does not set TEE_GEN_CAP_REG_MEM flag. This flag will be
enabled only after all other features of dynamic shared memory will be
implemented in subsequent patches. Of course user can ignore presence of
TEE_GEN_CAP_REG_MEM flag and try do call those functions. This is okay,
driver will register shared buffer in OP-TEE, but any attempts to use
this shared buffer will fail.
Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee/optee/optee_private.h')
| -rw-r--r-- | drivers/tee/optee/optee_private.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h index b63213d09d68..d7bc77d95022 100644 --- a/drivers/tee/optee/optee_private.h +++ b/drivers/tee/optee/optee_private.h @@ -160,6 +160,10 @@ int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session); void optee_enable_shm_cache(struct optee *optee); void optee_disable_shm_cache(struct optee *optee); +int optee_shm_register(struct tee_context *ctx, struct tee_shm *shm, + struct page **pages, size_t num_pages); +int optee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm); + int optee_from_msg_param(struct tee_param *params, size_t num_params, const struct optee_msg_param *msg_params); int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params, |