linux-kernel - Re: [PATCH v1] arm64: defconfig: Enable Ftrace and STM configs

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Message-ID: <CAA8EJppY4QXDWK1QsrorQM8NTOmi4cK_Fjhkzf10muRE85BQ-w@mail.gmail.com>
Date: Fri, 20 Sep 2024 10:10:45 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Mao Jinlong <quic_jinlmao@...cinc.com>
Cc: Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
	Bjorn Andersson <quic_bjorande@...cinc.com>, Geert Uytterhoeven <geert+renesas@...der.be>, 
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, Neil Armstrong <neil.armstrong@...aro.org>, 
	Arnd Bergmann <arnd@...db.de>, Nícolas F . R . A . Prado <nfraprado@...labora.com>, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] arm64: defconfig: Enable Ftrace and STM configs

On Fri, 20 Sept 2024 at 09:59, Mao Jinlong <quic_jinlmao@...cinc.com> wrote:
>
> Ftrace logs can be captured by STM over TMC sink path. We can enable
> ftrace logs along with HW trace of coresight component. The timestamp
> of ftrace logs and hw traces will be in sync which helps to debug.

You are describing what can be done. Please describe why this is
necessary and what is actually being done. See
Documentation/process/submitting-patches.rst. The "why" part is the
most important.

>
> Signed-off-by: Mao Jinlong <quic_jinlmao@...cinc.com>
> ---
>  arch/arm64/configs/defconfig | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index 4a3999eefa67..c0a56e58e554 100644
> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -1554,6 +1554,12 @@ CONFIG_NVMEM_SNVS_LPGPR=y
>  CONFIG_NVMEM_SPMI_SDAM=m
>  CONFIG_NVMEM_SUNXI_SID=y
>  CONFIG_NVMEM_UNIPHIER_EFUSE=y
> +CONFIG_STM_PROTO_BASIC=m
> +CONFIG_STM_PROTO_SYS_T=m
> +CONFIG_STM_DUMMY=m
> +CONFIG_STM_SOURCE_CONSOLE=m
> +CONFIG_STM_SOURCE_HEARTBEAT=m
> +CONFIG_STM_SOURCE_FTRACE=m
>  CONFIG_FPGA=y
>  CONFIG_FPGA_MGR_ALTERA_CVP=m
>  CONFIG_FPGA_MGR_STRATIX10_SOC=m
> @@ -1663,7 +1669,7 @@ CONFIG_DEBUG_INFO_REDUCED=y
>  CONFIG_MAGIC_SYSRQ=y
>  CONFIG_DEBUG_FS=y
>  # CONFIG_SCHED_DEBUG is not set
> -# CONFIG_FTRACE is not set
> +CONFIG_FTRACE=y
>  CONFIG_CORESIGHT=m
>  CONFIG_CORESIGHT_LINK_AND_SINK_TMC=m
>  CONFIG_CORESIGHT_CATU=m
> --
> 2.46.0
>


-- 
With best wishes
Dmitry