Date:   Wed, 08 Feb 2023 16:40:28 +0000
Message-ID: <86fsbgyutf.wl-maz@kernel.org>
From:   Marc Zyngier <maz@kernel.org>
To:     Zaid Al-Bassam <zalbassam@google.com>
Cc:     Jesus Sanchez-Palencia <jesussanp@google.com>,
        Russell King <linux@armlinux.org.uk>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        James Morse <james.morse@arm.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        Oliver Upton <oliver.upton@linux.dev>,
        Zenghui Yu <yuzenghui@huawei.com>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-perf-users@vger.kernel.org, kvmarm@lists.linux.dev,
        kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH 0/8] perf: arm: Make PMUv3 driver available for aarch32
In-Reply-To: <20230126204444.2204061-1-zalbassam@google.com>
References: <20230126204444.2204061-1-zalbassam@google.com>
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On Thu, 26 Jan 2023 20:44:36 +0000,
Zaid Al-Bassam <zalbassam@google.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.

	M.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=arm/pmuv3

-- 
Without deviation from the norm, progress is not possible.