linux-kernel - RE: [PATCH v2 1/2] perf: Fujitsu: Add the Uncore MAC PMU driver

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Message-ID:
 <OS3PR01MB690361C2E315CF9D1E6C7CBDD4072@OS3PR01MB6903.jpnprd01.prod.outlook.com>
Date: Fri, 20 Dec 2024 02:26:57 +0000
From: "Yoshihiro Furudera (Fujitsu)" <fj5100bi@...itsu.com>
To: 'Jonathan Cameron' <Jonathan.Cameron@...wei.com>
CC: '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'"
	<linux-arm-kernel@...ts.infradead.org>, 'Bjorn Andersson'
	<quic_bjorande@...cinc.com>, 'Geert Uytterhoeven' <geert+renesas@...der.be>,
	'Krzysztof Kozlowski' <krzysztof.kozlowski@...aro.org>, '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-doc@...r.kernel.org>, "'linux-kernel@...r.kernel.org'"
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 1/2] perf: Fujitsu: Add the Uncore MAC PMU driver

Hi, Jonathan

> > > diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
> > > index a04b73c40173..21006d1cda59 100644
> > > --- a/include/linux/cpuhotplug.h
> > > +++ b/include/linux/cpuhotplug.h
> > > @@ -228,6 +228,7 @@ enum cpuhp_state {
> > >  	CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE,
> > >  	CPUHP_AP_PERF_ARM_MARVELL_CN10K_DDR_ONLINE,
> > >  	CPUHP_AP_PERF_ARM_MRVL_PEM_ONLINE,
> > > +	CPUHP_AP_PERF_ARM_FUJITSU_MAC_ONLINE,
> >
> > If the DYN option works for you, I think we should go with that.
> > Some more recent PMU drivers are already using it without problem.
> 
> I will try to do as you suggested, but I'll check it first.

After checking, we found that the Uncore MAC/PCI PMU driver's
CPU hotplug callback function has no dependency on other callback functions,
so we changed it to the DYN option.

Best Regards,
Yoshihiro Furudera