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Date:   Fri, 31 Aug 2018 05:06:57 +0200
From:   Marek Vasut <>
To:     Dinh Nguyen <>,
        Florian Vaussard <>
Cc:     Mark Rutland <>,,
        Alberto Dassatti <>,,
        Florian Vaussard <>,
        Rob Herring <>,
Subject: Re: [PATCH 0/2] ARM: dts: socfpga: Add support for PMU on

On 03/08/2017 04:19 PM, Dinh Nguyen wrote:
> On 02/28/2017 09:52 AM, Florian Vaussard wrote:
>> Hi,
>> These patches add suport for ARM Performance Monitor Units on Arria5 and
>> Cyclone5 SoCFPGA. This was tested on a Cyclone 5 SoC DK board.
>> Side note: the same change can be probably applied to Arria10 as well,
>> but we do not have the hardware here to test.
>> Regards,
>> Florian
>> Florian Vaussard (2):
>>   ARM: dts: socfpga: Add labels for CPU nodes
>>   ARM: dts: socfpga: Add support for PMU
>>  arch/arm/boot/dts/socfpga.dtsi | 13 +++++++++++--
>>  1 file changed, 11 insertions(+), 2 deletions(-)
> Applied!

I have to wonder how this was tested. I tried this on 4.14.y, but when I
do "perf record -e cycles", I get no samples. Moreover, when I check the
PMU interrupts, "grep pmu /proc/interrupts", it shows 0 interrupts from
the ARM PMU all the time.

Why am I not getting any PMU interrupts when using perf ?

Best regards,
Marek Vasut

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