linux-kernel - [PATCH 00/11] arm64: qcom: add and enable SHM Bridge support

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Message-Id: <20230828192507.117334-1-bartosz.golaszewski@linaro.org>
Date:   Mon, 28 Aug 2023 21:24:56 +0200
From:   Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Alex Elder <elder@...aro.org>,
        Srini Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     kernel@...cinc.com, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 00/11] arm64: qcom: add and enable SHM Bridge support

SHM Bridge is a mechanism allowing to map limited areas of kernel's
virtual memory to physical addresses and share those with the
trustzone in order to not expose the entire RAM for SMC calls.

This series adds support for Qualcomm SHM Bridge in form of a platform
driver and library functions available to users. It enables SHM Bridge
support for three platforms and contains a bunch of cleanups for
qcom-scm.

Bartosz Golaszewski (11):
  firmware: qcom-scm: drop unneeded 'extern' specifiers
  firmware: qcom-scm: order includes alphabetically
  firmware: qcom-scm: atomically assign and read the global __scm
    pointer
  firmware: qcom-scm: add support for SHM bridge operations
  dt-bindings: document the Qualcomm TEE Shared Memory Bridge
  firmware: qcom-shm-bridge: new driver
  firmware: qcom-scm: use SHM bridge if available
  arm64: defconfig: enable Qualcomm SHM bridge module
  arm64: dts: qcom: sm8450: enable SHM bridge
  arm64: dts: qcom: sa8775p: enable SHM bridge
  arm64: dts: qcom: sm8150: enable SHM bridge

 .../bindings/firmware/qcom,shm-bridge.yaml    |  36 ++
 arch/arm64/boot/dts/qcom/sa8775p.dtsi         |   4 +
 arch/arm64/boot/dts/qcom/sm8150.dtsi          |   4 +
 arch/arm64/boot/dts/qcom/sm8450.dtsi          |   4 +
 arch/arm64/configs/defconfig                  |   1 +
 drivers/firmware/Kconfig                      |   8 +
 drivers/firmware/Makefile                     |   1 +
 drivers/firmware/qcom-shm-bridge.c            | 452 ++++++++++++++++++
 drivers/firmware/qcom_scm-smc.c               |  20 +-
 drivers/firmware/qcom_scm.c                   | 106 +++-
 drivers/firmware/qcom_scm.h                   |   3 +
 include/linux/firmware/qcom/qcom_scm.h        | 109 +++--
 include/linux/firmware/qcom/shm-bridge.h      |  32 ++
 13 files changed, 712 insertions(+), 68 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/firmware/qcom,shm-bridge.yaml
 create mode 100644 drivers/firmware/qcom-shm-bridge.c
 create mode 100644 include/linux/firmware/qcom/shm-bridge.h

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2.39.2