linux-toradex.git/drivers/tee, branch v6.8-rc3

Merge tag 'docs-6.8' of git://git.lwn.net/linux

2024-01-12T03:46:52+00:00

Pull documentation update from Jonathan Corbet:
 "Another moderately busy cycle for documentation, including:

   - The minimum Sphinx requirement has been raised to 2.4.4, following
     a warning that was added in 6.2

   - Some reworking of the Documentation/process front page to,
     hopefully, make it more useful

   - Various kernel-doc tweaks to, for example, make it deal properly
     with __counted_by annotations

   - We have also restored a warning for documentation of nonexistent
     structure members that disappeared a while back. That had the
     delightful consequence of adding some 600 warnings to the docs
     build. A sustained effort by Randy, Vegard, and myself has
     addressed almost all of those, bringing the documentation back into
     sync with the code. The fixes are going through the appropriate
     maintainer trees

   - Various improvements to the HTML rendered docs, including automatic
     links to Git revisions and a nice new pulldown to make translations
     easy to access

   - Speaking of translations, more of those for Spanish and Chinese

  ... plus the usual stream of documentation updates and typo fixes"

* tag 'docs-6.8' of git://git.lwn.net/linux: (57 commits)
  MAINTAINERS: use tabs for indent of CONFIDENTIAL COMPUTING THREAT MODEL
  A reworked process/index.rst
  ring-buffer/Documentation: Add documentation on buffer_percent file
  Translated the RISC-V architecture boot documentation.
  Docs: remove mentions of fdformat from util-linux
  Docs/zh_CN: Fix the meaning of DEBUG to pr_debug()
  Documentation: move driver-api/dcdbas to userspace-api/
  Documentation: move driver-api/isapnp to userspace-api/
  Documentation/core-api : fix typo in workqueue
  Documentation/trace: Fixed typos in the ftrace FLAGS section
  kernel-doc: handle a void function without producing a warning
  scripts/get_abi.pl: ignore some temp files
  docs: kernel_abi.py: fix command injection
  scripts/get_abi: fix source path leak
  CREDITS, MAINTAINERS, docs/process/howto: Update man-pages' maintainer
  docs: translations: add translations links when they exist
  kernel-doc: Align quick help and the code
  MAINTAINERS: add reviewer for Spanish translations
  docs: ignore __counted_by attribute in structure definitions
  scripts: kernel-doc: Clarify missing struct member description
  ..

Merge tag 'tee-iov-iter-for-v6.8' of https://git.linaro.org/people/jens.wiklander/linux-tee into soc/drivers

2023-12-22T11:38:03+00:00

TEE: improve shared buffer registration compatibility

* tag 'tee-iov-iter-for-v6.8' of https://git.linaro.org/people/jens.wiklander/linux-tee:
  tee: Use iov_iter to better support shared buffer registration

Link: https://lore.kernel.org/r/20231214134139.GA3098718@rayden
Signed-off-by: Arnd Bergmann

Merge tag 'optee-cleanup-for-v6.8' of https://git.linaro.org/people/jens.wiklander/linux-tee into soc/drivers

2023-12-22T11:37:09+00:00

OP-TEE cleanup

- Remove a redundant custom workqueue in the OP-TEE driver.
- Fix a missing description of an argument to optee_handle_rpc().

* tag 'optee-cleanup-for-v6.8' of https://git.linaro.org/people/jens.wiklander/linux-tee:
  optee: add missing description of RPC argument reference
  tee: optee: Remove redundant custom workqueue
  tee: optee: Fix supplicant based device enumeration

Link: https://lore.kernel.org/r/20231214132237.GA3092763@rayden
Signed-off-by: Arnd Bergmann

Merge tag 'kern-priv-shm-for-v6.8' of https://git.linaro.org/people/jens.wiklander/linux-tee into soc/drivers

2023-12-22T10:44:16+00:00

OP-TEE kernel private shared memory optimizations

Optimize OP-TEE driver private shared memory allocated as dynamic shared
memory. Both to handle larger than one page allocations and for more
efficient memory usage.

* tag 'kern-priv-shm-for-v6.8' of https://git.linaro.org/people/jens.wiklander/linux-tee:
  optee: allocate shared memory with alloc_pages_exact()
  optee: add page list to kernel private shared memory

Link: https://lore.kernel.org/r/20231211115815.GA616539@rayden
Signed-off-by: Arnd Bergmann

tee: Use iov_iter to better support shared buffer registration

2023-12-13T06:23:22+00:00

Currently it's not possible to register kernel buffers with TEE
which are allocated via vmalloc.

Use iov_iter and associated helper functions to manage the page
registration for all type of memories.

Suggested-by: Christoph Hellwig 
Signed-off-by: Arnaud Pouliquen 
Reviewed-by: Sumit Garg 
Signed-off-by: Jens Wiklander

optee: add missing description of RPC argument reference

2023-12-11T14:02:12+00:00

Adds missing inline description comment for RPC optional arguments
reference.

Reported-by: kernel test robot 
Closes: https://lore.kernel.org/lkml/202310192021.fvb6JDOY-lkp@intel.com/
Signed-off-by: Etienne Carriere 
Reviewed-by: Sumit Garg 
Signed-off-by: Jens Wiklander

Documentation: Destage TEE subsystem documentation

2023-12-08T22:45:10+00:00

Add a separate documentation directory for TEE subsystem since it is a
standalone subsystem which already offers devices consumed by multiple
different subsystem drivers.

Split overall TEE subsystem documentation modularly where:
- The userspace API has been moved to Documentation/userspace-api/tee.rst.
- The driver API has been moved to Documentation/driver-api/tee.rst.
- The first module covers the overview of TEE subsystem.
- The further modules are dedicated to different TEE implementations like:
  - OP-TEE
  - AMD-TEE
  - and so on for future TEE implementation support.

Acked-by: Rijo Thomas 
Acked-by: Jens Wiklander 
Signed-off-by: Sumit Garg 
Signed-off-by: Jonathan Corbet 
Link: https://lore.kernel.org/r/20231128072352.866859-1-sumit.garg@linaro.org

optee: allocate shared memory with alloc_pages_exact()

2023-12-04T13:48:42+00:00

Allocate memory to share with the secure world using alloc_pages_exact()
instead of alloc_pages() for more efficient memory usage.

Reviewed-by: Sumit Garg 
Signed-off-by: Jens Wiklander

optee: add page list to kernel private shared memory

2023-12-04T13:47:17+00:00

Until now has kernel private shared memory allocated as dynamic shared
memory (not from the static shared memory pool) been returned without a
list of physical pages on allocations via RPC. To support allocations
larger than one page add a list of physical pages.

Reviewed-by: Sumit Garg 
Signed-off-by: Jens Wiklander

optee: ffa_abi: add asynchronous notifications

2023-11-17T14:55:41+00:00

Adds support for asynchronous notifications from OP-TEE in secure world
when communicating via FF-A. In principle from OP-TEE and kernel driver
point of view this works in the same way as for the SMC ABI based
implementation.

The OP-TEE FF-A ABI is expanded in OPTEE_FFA_EXCHANGE_CAPABILITIES with
the capability OPTEE_FFA_SEC_CAP_ASYNC_NOTIF to indicate that OP-TEE
supports asynchronous notifications. OPTEE_FFA_ENABLE_ASYNC_NOTIF is
also added to tell that the driver has successfully initialized these
notifications.

Notification capability is negotiated while the driver is initialized.
If both sides supports these notifications then they are enabled.

The notification concept in this driver is merged with the FF-A concept,
the lower 64 values are reserved for FF-A as asynchronous notifications
while the synchronous notifications use the higher values.

So a FF-A notification has to be allocated for each discrete
asynchronous notification value needed. Only one asynchronous
notification value is used at the moment, the "do bottom half"
notification.

Signed-off-by: Jens Wiklander 
Reviewed-by: Sumit Garg 
Tested-by: Sudeep Holla