| Message ID | 20220411072156.24451-1-michael.srba@seznam.cz |
|---|---|
| Headers | show |
| Series | enable use of resources on the SSC bus on (some) qcom SoCs | expand |
On Mon, 11 Apr 2022 09:21:51 +0200, michael.srba@seznam.cz wrote: > From: Michael Srba <Michael.Srba@seznam.cz> > > NOTE: previous versions of this series didn't use a cover letter, > it's added in this resend in order to not upset the kernel bot. > > This series adds necessary changes for accessing recources in the SSC block > on msm8998 (though it should be possible to extend this to support other > SoCs). > > [...] Applied, thanks! [5/5] arm64: dts: qcom: msm8998: reserve potentially inaccessible clocks commit: 1ed29355df221407370933522a94dc8a0f47eb35 Best regards,
From: Michael Srba <Michael.Srba@seznam.cz> NOTE: previous versions of this series didn't use a cover letter, it's added in this resend in order to not upset the kernel bot. This series adds necessary changes for accessing recources in the SSC block on msm8998 (though it should be possible to extend this to support other SoCs). In order to make use of these changes, Linux (HLOS in qcom's terms) needs to be allowed to access the relevant address ranges by the SMMU configuration. For a simple way to modify an existing (closed source) qcom hypervisor image to change the static SMMU configuration, see [1]. If you lack ownership of your device, it should alternatively be possible to change the SMMU configuration at a later point, provided you manage to get code execution in the hypervisor by way of an exploit. [1] https://michael-srba.cz/mainline4life/msm8998_hypervisor_patch.html Michael Srba (5): dt-bindings: clock: gcc-msm8998: Add definitions of SSC-related clocks clk: qcom: gcc-msm8998: add SSC-related clocks dt-bindings: bus: add device tree bindings for qcom,ssc-block-bus drivers: bus: add driver for initializing the SSC bus on (some) qcom SoCs arm64: dts: qcom: msm8998: reserve potentially inaccessible clocks .../bindings/bus/qcom,ssc-block-bus.yaml | 147 +++++++ arch/arm64/boot/dts/qcom/msm8998.dtsi | 15 + drivers/bus/Kconfig | 11 + drivers/bus/Makefile | 1 + drivers/bus/qcom-ssc-block-bus.c | 391 ++++++++++++++++++ drivers/clk/qcom/gcc-msm8998.c | 56 +++ include/dt-bindings/clock/qcom,gcc-msm8998.h | 4 + 7 files changed, 625 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/qcom,ssc-block-bus.yaml create mode 100644 drivers/bus/qcom-ssc-block-bus.c