linux-kernel - Re: [PATCH 0/8] perf: arm: Make PMUv3 driver available for aarch32

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Message-ID: <6abb6cef-a9b3-7542-6e8a-fb463449ddf6@gmail.com>
Date:   Wed, 8 Feb 2023 16:15:51 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Marc Zyngier <maz@...nel.org>,
        Zaid Al-Bassam <zalbassam@...gle.com>
Cc:     Jesus Sanchez-Palencia <jesussanp@...gle.com>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Zenghui Yu <yuzenghui@...wei.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, kvmarm@...ts.linux.dev,
        kvmarm@...ts.cs.columbia.edu
Subject: Re: [PATCH 0/8] perf: arm: Make PMUv3 driver available for aarch32

On 2/8/23 08:40, Marc Zyngier wrote:
> On Thu, 26 Jan 2023 20:44:36 +0000,
> Zaid Al-Bassam <zalbassam@...gle.com> wrote:
>>
>> Currently, PMUv3 driver is only available for ARMv8 aarch64
>> platforms, ARMv8 running in aarch32 mode dont have access to
>> the driver. This is, especially, a problem for ARMv8 platforms
>> that only have aarch32 support, like the Cortex-A32.
> 
> FWIW, I've pushed out my own interpretation of this series to [1],
> including the changes I suggested. The results seems to correctly work
> in a 32bit guest on a 64bit host, which is what I (used to) care
> about.
> 
> Feel free to pick it up.

Tested-by: Florian Fainelli <f.fainelli@...il.com>

Thanks!
-- 
Florian