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SubjectRe: [PATCH v2 0/7] Asynchronous notifications from secure world
Hi Sumit,

On Thu, Jun 17, 2021 at 6:33 AM Sumit Garg <sumit.garg@linaro.org> wrote:
>
> Hi Jens,
>
> On Wed, 16 Jun 2021 at 16:07, Jens Wiklander <jens.wiklander@linaro.org> wrote:
> >
> > 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 interrupt is used to notify the driver that there are asynchronous
> > notifications pending.
> >
>
> It looks like a nice feature. I would like to get hands on with this.
> Can I test this feature on Qemu?

Absolutely, you can get this into the normal OP-TEE development repo setup with:
repo init -u https://github.com/OP-TEE/manifest.git -m default.xml
repo sync
Update optee_os with
https://github.com/jenswi-linaro/optee_os/tree/async_notif_v2
Update linux with https://github.com/jenswi-linaro/linux-1/tree/async_notif_v2
cd build
make all -j...
make run-only

If you type anything at the secure console you'll notice how it
changes behaviour once the Linux kernel has booted.

Cheers,
Jens

>
> -Sumit
>
> > 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@kernel.org>.
> >
> > Thanks,
> > Jens
> >
> > Jens Wiklander (7):
> > docs: staging/tee.rst: add a section on OP-TEE notifications
> > dt-bindings: arm: Convert optee binding to json-schema
> > 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
> >
> > .../bindings/arm/firmware/linaro,optee-tz.txt | 31 ---
> > .../arm/firmware/linaro,optee-tz.yaml | 57 +++++
> > Documentation/staging/tee.rst | 27 +++
> > 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 +++
> > 14 files changed, 576 insertions(+), 155 deletions(-)
> > delete mode 100644 Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.txt
> > create mode 100644 Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml
> > create mode 100644 drivers/tee/optee/notif.c
> >
> > --
> > 2.31.1
> >

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