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From: Vince Weaver <vincent.weaver@maine.edu>
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Date: Fri, 18 May 2018 12:29:36 -0400 (EDT)
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To: Marc Zyngier <marc.zyngier@arm.com>
cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Will Deacon <will.deacon@arm.com>, Mark Rutland <mark.rutland@arm.com>,
        Russell King <linux@arm.linux.org.uk>,
        Vladimir Murzin <vladimir.murzin@arm.com>,
        Vince Weaver <vincent.weaver@maine.edu>,
        Peter Zijlstra <peterz@infradead.org>,
        Stefan Wahren <stefan.wahren@i2se.com>, Eric Anholt <eric@anholt.net>,
        Florian Fainelli <f.fainelli@gmail.com>
Subject: Re: [PATCH v3 0/5]
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On Fri, 18 May 2018, Marc Zyngier wrote:

> There is also the case of people natively running 32bit kernels on
> 64bit HW and trying to upstream unspeakable hacks, hoping that the
> stars will align and that they'll win the lottery (see [1]).

I've tested these patches on a Raspberry Pi 3B running a 32-bit upstream 
(4.17-rc5-git) kernel and they work.

[    0.472906] hw perfevents: enabled with armv8_cortex_a53 PMU driver, 7 counters available

I only needed to add this to the devicetree

	arm-pmu {
		compatible = "arm,cortex-a53-pmu";
		interrupt-parent = <&local_intc>;
		interrupts = <9 IRQ_TYPE_LEVEL_HIGH>;
	};


Tested-by: Vince Weaver <vincent.weaver@maine.edu>

Vince