linux.git/Documentation/staging, branch v6.6.131

Documentation: use capitalization for chapters and acronyms

2023-05-16T18:49:31+00:00

Use capital letters in acronyms for CD-ROM, FPGA, and PCMCIA.

Use capital letter in the first word of chapter headings for
Locking, Timers, and "Brief tutorial on CRC computation".

Signed-off-by: Randy Dunlap 
Cc: Moritz Fischer 
Cc: Wu Hao 
Cc: Tom Rix 
Cc: Peter Zijlstra 
Cc: Ingo Molnar 
Cc: Will Deacon 
Cc: Waiman Long 
Cc: Boqun Feng 
Cc: Dominik Brodowski 
Cc: Thomas Gleixner 
Acked-by: Xu Yilun 
Reviewed-by: Phillip Potter 
Link: https://lore.kernel.org/r/20230516001518.14514-1-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet

tee: optee: Add SMC for loading OP-TEE image

2023-04-03T06:57:49+00:00

Adds an SMC call that will pass an OP-TEE binary image to EL3 and
instruct it to load it as the BL32 payload. This works in conjunction
with a feature added to Trusted Firmware for ARMv8 and above
architectures that supports this.

The main purpose of this change is to facilitate updating the OP-TEE
component on devices via a rootfs change rather than having to do a
firmware update. Further details are linked to in the Kconfig file.

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

docs: put atomic*.txt and memory-barriers.txt into the core-api book

2022-09-29T18:55:06+00:00

These files describe part of the core API, but have never been converted to
RST due to ... let's say local oppposition.  So, create a set of
special-purpose wrappers to ..include these files into a separate page so
that they can be a part of the htmldocs build.  Then link them into the
core-api manual and remove them from the "staging" dumping ground.

Acked-by: Jani Nikula 
Signed-off-by: Jonathan Corbet 
Reviewed-by: David Vernet 
Acked-by: Randy Dunlap 
Link: https://lore.kernel.org/r/20220927160559.97154-7-corbet@lwn.net
Signed-off-by: Jonathan Corbet

jump_label: make initial NOP patching the special case

2022-06-24T07:48:55+00:00

Instead of defaulting to patching NOP opcodes at init time, and leaving
it to the architectures to override this if this is not needed, switch
to a model where doing nothing is the default. This is the common case
by far, as only MIPS requires NOP patching at init time. On all other
architectures, the correct encodings are emitted by the compiler and so
no initial patching is needed.

Signed-off-by: Ard Biesheuvel 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Mark Rutland 
Acked-by: Peter Zijlstra (Intel) 
Link: https://lore.kernel.org/r/20220615154142.1574619-4-ardb@kernel.org

remoteproc: Change rproc_shutdown() to return a status

2022-03-11T20:31:55+00:00

The rproc_shutdown() function is currently not returning any
error code, and any failures within rproc_stop() are not passed
back to the users. Change the signature to return a success value
back to the callers.

The remoteproc sysfs and cdev interfaces are also updated to
return back this status to userspace.

Signed-off-by: Suman Anna 
Signed-off-by: Bjorn Andersson 
Link: https://lore.kernel.org/r/20220213201246.25952-2-s-anna@ti.com

Merge tag 'docs-5.17-2' of git://git.lwn.net/linux

2022-01-22T07:02:57+00:00

Pull documentation fixes from Jonathan Corbet:
 "Three small documentation fixes"

* tag 'docs-5.17-2' of git://git.lwn.net/linux:
  Documentation: fix firewire.rst ABI file path error
  docs: ftrace: fix ambiguous sentence
  docs: staging/tee.rst: fix two typos found while reading

docs: staging/tee.rst: fix two typos found while reading

2022-01-17T21:55:03+00:00

Signed-off-by: Wang Cheng 
Reviewed-by: Sumit Garg 
Acked-by: Randy Dunlap 
Link: https://lore.kernel.org/r/20220115125236.34886-1-wanngchenng@gmail.com
Signed-off-by: Jonathan Corbet

docs: staging/tee.rst: add a section on OP-TEE notifications

2021-11-17T13:08:53+00:00

Adds a section on notifications used by OP-TEE, synchronous and
asynchronous.

Reviewed-by: Sumit Garg 
Acked-by: Marc Zyngier 
Signed-off-by: Jens Wiklander

Merge tag 'rproc-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc

2020-08-11T18:17:45+00:00

Pull remoteproc updates from Bjorn Andersson:
 "This introduces a new "detached" state for remote processors that are
  deemed to be running at the time Linux boots and the infrastructure
  for "attaching" to these. It then introduces the support for
  performing this operation for the STM32 platform.

  The coredump functionality is moved out from the core file and gains
  support for an optional mode where the recovery phase awaits the
  notification from devcoredump that the dump should be released. This
  allows userspace to grab the coredump in scenarios where vmalloc space
  is too low for creating a complete copy of the coredump before handing
  this to devcoredump.

  A new character device based interface is introduced to allow tying
  the stoppage of a remote processor to the termination of a user space
  process. This is useful in situations when such process provides
  crucial resources/operations for the firmware running on the remote
  processor.

  The Texas Instrument K3 driver gains support for the C66x and C71x
  DSPs.

  Qualcomm remoteprocs gains support for stashing relocation information
  in IMEM, to aid post mortem debugging and the crash notification
  mechanism is generalized to be reusable in cases where loosely coupled
  drivers needs to know about the status of a remote processor. One such
  example is the IPA hardware block, which is jointly owned with the
  modem and migrated to this improved interface.

  It also introduces a number of bug fixes and debug improvements for
  the Qualcomm modem remoteproc driver.

  And it cleans up the inconsistent interface for remoteproc drivers to
  implement power management"

* tag 'rproc-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc: (56 commits)
  remoteproc: core: Register the character device interface
  remoteproc: Add remoteproc character device interface
  remoteproc: kill IPA notify code
  net: ipa: new notification infrastructure
  remoteproc: k3-dsp: Add support for C71x DSPs
  dt-bindings: remoteproc: k3-dsp: Update bindings for C71x DSPs
  remoteproc: k3-dsp: Add support for L2RAM loading on C66x DSPs
  remoteproc: k3-dsp: Add a remoteproc driver of K3 C66x DSPs
  dt-bindings: remoteproc: Add bindings for C66x DSPs on TI K3 SoCs
  remoteproc: k3: Add TI-SCI processor control helper functions
  remoteproc: Introduce rproc_of_parse_firmware() helper
  dt-bindings: arm: keystone: Add common TI SCI bindings
  remoteproc: qcom_q6v5_mss: Remove redundant running state
  remoteproc: qcom: q6v5: Update running state before requesting stop
  remoteproc: qcom_q6v5_mss: Add modem debug policy support
  remoteproc: qcom_q6v5_mss: Validate modem blob firmware size before load
  remoteproc: qcom_q6v5_mss: Validate MBA firmware size before load
  rpmsg: update documentation
  remoteproc: qcom_q6v5_mss: Add MBA log extraction support
  remoteproc: Add coredump debugfs entry
  ...

docs: staging/tee.rst: convert into definition list

2020-07-23T20:25:12+00:00

Fix the following warnings:

tee.rst:65: WARNING: Unexpected indentation.

tee.rst:69: WARNING: Block quote ends without a
blank line; unexpected unindent.

By switching to the 'definition list' syntax.

Signed-off-by: Daniel W. S. Almeida 
Link: https://lore.kernel.org/r/20200718165107.625847-4-dwlsalmeida@gmail.com
Signed-off-by: Jonathan Corbet