linux-hardening - Re: [PATCH v3 07/18] arm64: defconfig: Enable Qualcomm minidump driver

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Date:   Thu, 4 May 2023 17:15:31 +0530
From:   Mukesh Ojha <quic_mojha@...cinc.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <corbet@....net>,
        <keescook@...omium.org>, <tony.luck@...el.com>,
        <gpiccoli@...lia.com>, <catalin.marinas@....com>,
        <will@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <robh+dt@...nel.org>, <linus.walleij@...aro.org>,
        <linux-gpio@...r.kernel.org>, <srinivas.kandagatla@...aro.org>
CC:     <linux-arm-msm@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-hardening@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v3 07/18] arm64: defconfig: Enable Qualcomm minidump
 driver



On 5/4/2023 4:53 PM, Krzysztof Kozlowski wrote:
> On 03/05/2023 19:02, Mukesh Ojha wrote:
>> Previous patches add the Qualcomm minidump driver support, so
>> lets enable minidump config so that it can be used by kernel
>> clients.
>>
>> Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>
> 
> This patchset is split too much. Defconfig change is one change. Not two
> or three.
> 
>> ---
>>   arch/arm64/configs/defconfig | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
>> index a24609e..831c942 100644
>> --- a/arch/arm64/configs/defconfig
>> +++ b/arch/arm64/configs/defconfig
>> @@ -1250,6 +1250,7 @@ CONFIG_QCOM_STATS=m
>>   CONFIG_QCOM_WCNSS_CTRL=m
>>   CONFIG_QCOM_APR=m
>>   CONFIG_QCOM_ICC_BWMON=m
>> +CONFIG_QCOM_MINIDUMP=y
> 
> This must be a module.

Why do you think this should be a module ?

Is it because, it is lying here among others '=m' ?

Or you have some other reasoning ? like it is for qcom specific
soc and can not be used outside ? but that is not true for
all configs mentioned here.

The reason behind making it as '=y' was, to collect information from 
core kernel data structure as well as the information like percpu data, 
run queue, irq stat kind of information on kernel crash on a target 
running some perf configuration(android phone).

-- Mukesh

> 
> Best regards,
> Krzysztof
>