linux-kernel - Re: [PATCH] arm: bcm2835: Add the PMU to the devicetree.

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Message-ID: <1863838560.56771.1526636258081@email.1und1.de>
Date:   Fri, 18 May 2018 11:37:38 +0200 (CEST)
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     Marc Zyngier <marc.zyngier@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vince Weaver <vincent.weaver@...ne.edu>
Cc:     Ingo Molnar <mingo@...hat.com>,
        linux-rpi-kernel@...ts.infradead.org,
        Eric Anholt <eric@...olt.net>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        bcm-kernel-feedback-list@...adcom.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] arm: bcm2835: Add the PMU to the devicetree.

Hi Marc,

> Marc Zyngier <marc.zyngier@....com> hat am 18. Mai 2018 um 10:07 geschrieben:
> 
> I have a pretty simple series[1] which I used to profile 32bit guests on
> an arm64 KVM host. Nobody really cared about it because running a 32bit
> kernel on 64bit HW is a bit odd, to say the least, and I'm probably the
> only one actually running 32bit VMs.
> 
> > FWIW, Broadcom STB chips, even when 64-bit capable or often used with an
> > 32-bit ARM kernel, so having the ARMv8 PMUs work under a 32-bit ARM
> > kernel would be great. The downstream solution we have sued thus far is
> > to find the closest compatible string to represent those, which is not
> > great...
> Ah, so you're *really* doing that? I'm not going to ask why, I'm scared
> of the answer... ;-)
> 
> Anyway, I can repost that series if that will prevent people from having
> that kind of silly hacks.

yes please. But there is a minor nit: some patches introduce new files without SPDX tags.

Thanks
Stefan

> 
> Thanks,
> 
> 	M.
> 
> [1]
> https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=kvm-arm/pmuv3-32bit
> -- 
> Jazz is not dead. It just smells funny...