linux-kernel - [PATCH v4 0/6] Asynchronous notifications from secure world

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Message-Id: <20210818101849.602257-1-jens.wiklander@linaro.org>
Date:   Wed, 18 Aug 2021 12:18:43 +0200
From:   Jens Wiklander <jens.wiklander@...aro.org>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        op-tee@...ts.trustedfirmware.org, devicetree@...r.kernel.org,
        linux-doc@...r.kernel.org
Cc:     Jerome Forissier <jerome@...issier.org>,
        Etienne Carriere <etienne.carriere@...aro.org>,
        Sumit Garg <sumit.garg@...aro.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Ard Biesheuvel <ardb@...nel.org>,
        Marc Zyngier <maz@...nel.org>,
        Jens Wiklander <jens.wiklander@...aro.org>
Subject: [PATCH v4 0/6] Asynchronous notifications from secure world

Hi all,

This adds support for asynchronous notifications from OP-TEE in secure
world to the OP-TEE driver. This allows a design with a top half and bottom
half type of driver where the top half runs in secure interrupt context and
a notifications tells normal world to schedule a yielding call to do the
bottom half processing.

An edge-triggered interrupt is used to notify the driver that there are
asynchronous notifications pending.

v3->v4:
* Clarfied the expected type of interrypt is edge-triggered, both in
  the normal documentation and in the DT bindings as requested.

v2->v3:
* Rebased on v5.14-rc2 which made the patch "dt-bindings: arm: Convert
  optee binding to json-schema" from the V2 patch set obsolete.
* Applied Ard's Acked-by on "optee: add asynchronous notifications"

v1->v2:
* Added documentation
* Converted optee bindings to json-schema and added interrupt property
* Configure notification interrupt from DT instead of getting it
  from secure world, suggested by Ard Biesheuvel <ardb@...nel.org>.

Thanks,
Jens

Jens Wiklander (6):
  docs: staging/tee.rst: add a section on OP-TEE notifications
  dt-bindings: arm: optee: add interrupt property
  tee: fix put order in teedev_close_context()
  tee: add tee_dev_open_helper() primitive
  optee: separate notification functions
  optee: add asynchronous notifications

 .../arm/firmware/linaro,optee-tz.yaml         |   7 +
 Documentation/staging/tee.rst                 |  29 +++
 drivers/tee/optee/Makefile                    |   1 +
 drivers/tee/optee/call.c                      |  27 +++
 drivers/tee/optee/core.c                      |  87 +++++--
 drivers/tee/optee/notif.c                     | 226 ++++++++++++++++++
 drivers/tee/optee/optee_msg.h                 |   9 +
 drivers/tee/optee/optee_private.h             |  23 +-
 drivers/tee/optee/optee_rpc_cmd.h             |  31 +--
 drivers/tee/optee/optee_smc.h                 |  75 +++++-
 drivers/tee/optee/rpc.c                       |  73 +-----
 drivers/tee/tee_core.c                        |  37 ++-
 include/linux/tee_drv.h                       |  27 +++
 13 files changed, 528 insertions(+), 124 deletions(-)
 create mode 100644 drivers/tee/optee/notif.c

-- 
2.31.1