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

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Message-ID: <023f532b-62d6-4a38-b288-e08b5f7788ac@quicinc.com>
Date: Tue, 24 Sep 2024 17:19:14 +0800
From: Jinlong Mao <quic_jinlmao@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
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 2024/9/20 16:10, Dmitry Baryshkov wrote:
> 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.
> 
Thanks for the review. I will update in next version.
>>
>> 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
>>
> 
>