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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
Date: Wed, 08 Feb 2023 16:40:28 +0000	[thread overview]
Message-ID: <86fsbgyutf.wl-maz@kernel.org> (raw)
In-Reply-To: <20230126204444.2204061-1-zalbassam@google.com>

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.

WARNING: multiple messages have this Message-ID (diff)
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
Date: Wed, 08 Feb 2023 16:40:28 +0000	[thread overview]
Message-ID: <86fsbgyutf.wl-maz@kernel.org> (raw)
In-Reply-To: <20230126204444.2204061-1-zalbassam@google.com>

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.

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2023-02-08 16:40 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-26 20:44 [PATCH 0/8] perf: arm: Make PMUv3 driver available for aarch32 Zaid Al-Bassam
2023-01-26 20:44 ` Zaid Al-Bassam
2023-01-26 20:44 ` [PATCH 1/8] arm64: perf: Move PMUv3 driver to drivers/perf Zaid Al-Bassam
2023-01-26 20:44   ` Zaid Al-Bassam
2023-01-26 20:44 ` [PATCH 2/8] arm64: perf: Abstract system register accesses away Zaid Al-Bassam
2023-01-26 20:44   ` Zaid Al-Bassam
2023-01-26 20:44 ` [PATCH 3/8] perf: pmuv3: Add common defines for the PMU version Zaid Al-Bassam
2023-01-26 20:44   ` Zaid Al-Bassam
2023-02-08 11:20   ` Marc Zyngier
2023-02-08 11:20     ` Marc Zyngier
2023-01-26 20:44 ` [PATCH 4/8] perf: pmuv3: Add wrappers for KVM accesses Zaid Al-Bassam
2023-01-26 20:44   ` Zaid Al-Bassam
2023-02-08 11:24   ` Marc Zyngier
2023-02-08 11:24     ` Marc Zyngier
2023-01-26 20:44 ` [PATCH 5/8] perf: pmuv3: Change GENMASK to GENMASK_ULL Zaid Al-Bassam
2023-01-26 20:44   ` Zaid Al-Bassam
2023-02-08 11:30   ` Marc Zyngier
2023-02-08 11:30     ` Marc Zyngier
2023-01-26 20:44 ` [PATCH 6/8] ARM: Make CONFIG_CPU_V7 valid for 32bit ARMv8 implementations Zaid Al-Bassam
2023-01-26 20:44   ` Zaid Al-Bassam
2023-01-26 20:44 ` [PATCH 7/8] ARM: perf: Allow the use of the PMUv3 driver on 32bit ARM Zaid Al-Bassam
2023-01-26 20:44   ` Zaid Al-Bassam
2023-02-08 12:51   ` Marc Zyngier
2023-02-08 12:51     ` Marc Zyngier
2023-01-26 20:44 ` [PATCH 8/8] ARM: mach-virt: Select PMUv3 driver by default Zaid Al-Bassam
2023-01-26 20:44   ` Zaid Al-Bassam
2023-03-02 13:57   ` kernel test robot
2023-02-08 16:40 ` Marc Zyngier [this message]
2023-02-08 16:40   ` [PATCH 0/8] perf: arm: Make PMUv3 driver available for aarch32 Marc Zyngier
2023-02-09  0:15   ` Florian Fainelli
2023-02-09  0:15     ` Florian Fainelli
2023-02-10 16:58   ` Zaid Al-Bassam
2023-02-10 16:58     ` Zaid Al-Bassam

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