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OP-TEE Asynchronous notifications from secure world

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Adds support in the SMC based OP-TEE driver to receive asynchronous
 notifications from secure world using an edge-triggered interrupt as
 delivery mechanism.
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Merge tag 'optee-async-notif-for-v5.17' of https://git.linaro.org/people/jens.wiklander/linux-tee into arm/drivers

OP-TEE Asynchronous notifications from secure world

Adds support in the SMC based OP-TEE driver to receive asynchronous
notifications from secure world using an edge-triggered interrupt as
delivery mechanism.

* tag 'optee-async-notif-for-v5.17' of https://git.linaro.org/people/jens.wiklander/linux-tee:
  optee: Fix NULL but dereferenced coccicheck error
  optee: add asynchronous notifications
  optee: separate notification functions
  tee: export teedev_open() and teedev_close_context()
  tee: fix put order in teedev_close_context()
  dt-bindings: arm: optee: add interrupt property
  docs: staging/tee.rst: add a section on OP-TEE notifications

Link: https://lore.kernel.org/r/20211213102359.GA1638682@jade
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2021-12-14 11:27:38 +01:00
commit c6e5bdae04
14 changed files with 523 additions and 124 deletions
Download patch file Download diff file Expand all files Collapse all files

14
include/linux/tee_drv.h
View file

@ -587,4 +587,18 @@ struct tee_client_driver {
#define to_tee_client_driver(d) \
container_of(d, struct tee_client_driver, driver)
/**
* teedev_open() - Open a struct tee_device
* @teedev: Device to open
*
* @return a pointer to struct tee_context on success or an ERR_PTR on failure.
*/
struct tee_context *teedev_open(struct tee_device *teedev);
/**
* teedev_close_context() - closes a struct tee_context
* @ctx: The struct tee_context to close
*/
void teedev_close_context(struct tee_context *ctx);
#endif /*__TEE_DRV_H*/