The memory region allocated using dma_alloc_attr with no kernel mapping attribute set would still be a part of the linear kernel map. Any access to this region by the application processor after assigning it to the remote Q6 will result in a XPU violation. Fix this by replacing the dynamically allocated memory region with a no-map carveout and unmap the modem metadata memory region before passing control to the remote Q6. The addition of the carveout and memunmap is required only on SoCs that mandate memory protection before transferring control to Q6, hence the driver falls back to dynamic memory allocation in the absence of the modem metadata carveout. V3: * remove double space [Krzysztof] * Pickup R-bs * yaml description rewrite [Krzysztof] * fix compatible property [Krzysztof] * add blank lines and additionalProperties: false to mba/mpss objects * add blank lines and additionalProperties: false to mdata objects [Krzysztof] * Drop revert no_kernel_mapping since it's already on the list [Mani] * kfree metadata from the branch for parity V2: * Convert legacy bindings to yaml * Revert no_kernel_mapping [Mani/Robin] * Pad commit message to explain bindings break [Krzysztof] * Split dt/bindings per SoC [Krzysztof] Depends on: [revert no_kernel_mapping]: https://lore.kernel.org/linux-arm-msm/20221223092703.61927-2-hch@xxxxxx/ Sibi Sankar (10): dt-bindings: remoteproc: qcom,q6v5: Move MSM8996 to schema dt-bindings: remoteproc: qcom,msm8996-mss-pil: Update memory region dt-bindings: remoteproc: qcom,sc7180-mss-pil: Update memory-region dt-bindings: remoteproc: qcom,sc7280-mss-pil: Update memory-region remoteproc: qcom_q6v5_mss: Use a carveout to authenticate modem headers arm64: dts: qcom: msm8996: Add a carveout for modem metadata arm64: dts: qcom: msm8998: Add a carveout for modem metadata arm64: dts: qcom: sdm845: Add a carveout for modem metadata arm64: dts: qcom: sc7180: Add a carveout for modem metadata arm64: dts: qcom: sc7280: Add a carveout for modem metadata .../remoteproc/qcom,msm8996-mss-pil.yaml | 393 ++++++++++++++++++ .../bindings/remoteproc/qcom,q6v5.txt | 137 +----- .../remoteproc/qcom,sc7180-mss-pil.yaml | 3 +- .../remoteproc/qcom,sc7280-mss-pil.yaml | 3 +- .../boot/dts/qcom/msm8996-xiaomi-common.dtsi | 6 + arch/arm64/boot/dts/qcom/msm8996.dtsi | 9 + arch/arm64/boot/dts/qcom/msm8998.dtsi | 9 + arch/arm64/boot/dts/qcom/sc7180-idp.dts | 7 +- arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 7 +- .../dts/qcom/sc7280-herobrine-lte-sku.dtsi | 7 +- arch/arm64/boot/dts/qcom/sdm845.dtsi | 9 + drivers/remoteproc/qcom_q6v5_mss.c | 48 ++- 12 files changed, 495 insertions(+), 143 deletions(-) create mode 100644 Documentation/devicetree/bindings/remoteproc/qcom,msm8996-mss-pil.yaml -- 2.17.1
