Re: [PATCH v6 1/7] dt-bindings: arm: coresight-tmc: Add "memory-region" property
From: Krzysztof Kozlowski <hidden>
Date: 2024-01-05 09:54:28
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On 05/01/2024 06:58, Linu Cherian wrote:
memory-region 0: Reserved trace buffer memory TMC ETR: When available, use this reserved memory region for trace data capture. Same region is used for trace data retention after a panic or watchdog reset. TMC ETF: When available, use this reserved memory region for trace data retention synced from internal SRAM after a panic or watchdog reset. memory-region 1: Reserved meta data memory TMC ETR, ETF: When available, use this memory for register snapshot retention synced from hardware registers after a panic or watchdog reset. Reviewed-by: Rob Herring <robh@kernel.org>
...
+ memory-region: + items: + - description: Reserved trace buffer memory for ETR and ETF sinks. + For ETR, this reserved memory region is used for trace data capture. + Same region is used for trace data retention as well after a panic + or watchdog reset. + This reserved memory region is used as trace buffer or used for trace + data retention only if specifically selected by the user in sysfs + interface. + The default memory usage models for ETR in sysfs/perf modes are + otherwise unaltered. + + For ETF, this reserved memory region is used by default for + retention of trace data synced from internal SRAM after a panic + or watchdog reset. + - description: Reserved meta data memory. Used for ETR and ETF sinks + for storing metadata.
If there is going to be new version/resend, add a blank line here. Keep the Rb tag. Best regards, Krzysztof _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel