linux-kernel - Re: [PATCH 1/2] perf: Fujitsu: Add the Uncore MAC PMU driver

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Message-ID: <c50d36ca-2268-4149-8bf0-c44fc1786d9c@linaro.org>
Date: Fri, 8 Nov 2024 12:08:41 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Yoshihiro Furudera <fj5100bi@...itsu.com>, Will Deacon <will@...nel.org>,
 Mark Rutland <mark.rutland@....com>, Jonathan Corbet <corbet@....net>,
 Catalin Marinas <catalin.marinas@....com>,
 linux-arm-kernel@...ts.infradead.org,
 Bjorn Andersson <quic_bjorande@...cinc.com>,
 Geert Uytterhoeven <geert+renesas@...der.be>,
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Konrad Dybcio <konradybcio@...nel.org>,
 Neil Armstrong <neil.armstrong@...aro.org>, Arnd Bergmann <arnd@...db.de>,
 Nícolas F. R. A. Prado <nfraprado@...labora.com>,
 Thomas Gleixner <tglx@...utronix.de>, Peter Zijlstra <peterz@...radead.org>,
 linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] perf: Fujitsu: Add the Uncore MAC PMU driver

On 08/11/2024 12:03, Krzysztof Kozlowski wrote:
> On 08/11/2024 06:40, Yoshihiro Furudera wrote:
>> This adds a new dynamic PMU to the Perf Events framework to program and
>> control the Uncore MAC PMUs in Fujitsu chips.
>>
>> This driver was created with reference to drivers/perf/qcom_l3_pmu.c.

This confused me...

>>  CONFIG_ARM_SPE_PMU=m
>> diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
>> index bab8ba64162f..4705c605e286 100644
>> --- a/drivers/perf/Kconfig
>> +++ b/drivers/perf/Kconfig
>> @@ -178,6 +178,15 @@ config FSL_IMX9_DDR_PMU
>>  	 can give information about memory throughput and other related
>>  	 events.
>>  
>> +config FUJITSU_MAC_PMU
>> +	bool "Fujitsu Uncore MAC PMU"
>> +	depends on (ARM64 && ACPI) || (COMPILE_TEST && 64BIT)
> 
> Missing depends on specific ARCH.
> 
> Sorry, this looks like work for some out of tree arch support. I don't
> think we have any interest in taking it... unless it is part of bigger
> patchset/work? If so, then provide *lore* link to relevant patchset.
> 

-ENOTENOUGHCOFFEE, I see now ACPI dependency so there will be no SoC
folks for this, right?  Then anyway split work per subsystem and send
defconfig to Soc maintainers.

Best regards,
Krzysztof