Messages in this thread | | | Date | Tue, 24 Oct 2023 17:53:54 +0800 | Subject | Re: [PATCH v1 0/5] soc/arm64: qcom: add initial version of memory dump | From | Zhenhua Huang <> |
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On 2023/10/23 22:31, Caleb Connolly wrote: > > > On 23/10/2023 10:20, Zhenhua Huang wrote: >> Qualcomm memory dump driver is to cooperate with firmware, providing the >> hints(id and size) of storing useful debugging information into pre-allocated >> memory. Firmware then does the real data capture. The debugging information >> includes cache contents, internal memory, registers. >> >> The driver dynamically reserves memory and provides the hints(dump id and size) >> following specified protocols with firmware. After crash and warm reboot, >> firmware scans these information and stores contents into reserved memory >> accordingly. Firmware then enters into full dump mode which dumps whole DDR >> to host through USB. >> >> User then get full dump using PCAT and can parse out these informations. > > PCAT is a proprietary tool that requires signing up to qualcomm.com and > installing the Qualcomm Package Manager to access. It also relies on > another tool (QUTS) to actually interact with the board. >
Oh.. I saw PCAT is introduced in doc of RB5 development kit so tried with it as well. I will investigate more on this. Thanks.
> Shouldn't we have a FOSS (or at the very least OSS) tool that can be > used to interact with these memory dumps? >> >> Dump id and size are provided by bootconfig. The expected format of a >> bootconfig file is as follows:- >> memory_dump_config { >> <node name> { >> id = <id of HW component> >> size = <dump size of HW component> >> } >> } >> >> for example: >> memory_dump_config { >> c0_context_dump { >> id = 0 >> size = 0x800 >> } >> } >> >> Test based on 6.6-rc1. >> >> Zhenhua Huang (5): >> dt-bindings: soc: qcom: Add memory_dump driver bindings >> dt-bindings: sram: qcom,imem: document sm8250 >> soc: qcom: memory_dump: Add memory dump driver >> arm64: defconfig: enable Qcom Memory Dump driver >> arm64: dts: qcom: sm8250: Add memory dump node >> >> .../bindings/soc/qcom/qcom,mem-dump.yaml | 42 ++ >> .../devicetree/bindings/sram/qcom,imem.yaml | 45 ++ >> MAINTAINERS | 7 + >> arch/arm64/boot/dts/qcom/sm8250.dtsi | 31 ++ >> arch/arm64/configs/defconfig | 1 + >> drivers/soc/qcom/Kconfig | 11 + >> drivers/soc/qcom/Makefile | 1 + >> drivers/soc/qcom/memory_dump.c | 540 +++++++++++++++++++++ >> 8 files changed, 678 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,mem-dump.yaml >> create mode 100644 drivers/soc/qcom/memory_dump.c >> >
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