From: Marc Zyngier <marc.zyngier@arm.com>
To: Vladimir Murzin <vladimir.murzin@arm.com>,
Stefan Wahren <wahrenst@gmx.net>
Cc: Mark Rutland <mark.rutland@arm.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Florian Fainelli <f.fainelli@gmail.com>,
Scott Branden <sbranden@broadcom.com>,
Stephen Boyd <sboyd@kernel.org>, Ray Jui <rjui@broadcom.com>,
Linus Walleij <linus.walleij@linaro.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Eric Anholt <eric@anholt.net>, Rob Herring <robh+dt@kernel.org>,
bcm-kernel-feedback-list@broadcom.com,
Mark Brown <broonie@kernel.org>,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
Michael Turquette <mturquette@baylibre.com>,
linux-arm-kernel@lists.infradead.org,
linux-rpi-kernel@lists.infradead.org
Subject: Re: [PATCH RFC 18/18] ARM: dts: Add minimal Raspberry Pi 4 support
Date: Wed, 24 Jul 2019 11:41:32 +0100 [thread overview]
Message-ID: <27de7618-57a7-5069-1c22-b45e93999b8c@arm.com> (raw)
In-Reply-To: <34b2b928-c078-8898-842b-908a90593932@arm.com>
Hi Vladimir,
On 24/07/2019 10:51, Vladimir Murzin wrote:
> On 7/23/19 7:13 PM, Marc Zyngier wrote:
>>> + arm-pmu {
>>> + /*
>>> + * N.B. the A72 PMU support only exists in arch/arm64, hence
>>> + * the fallback to the A53 version.
>>> + */
>>> + compatible = "arm,cortex-a72-pmu", "arm,cortex-a53-pmu";
>> You're thus guaranteed to count the wrong events... And you could at
>> least have "arm,armv8-pmuv3".
>>
>
> Isn't "arm,armv8-pmuv3" still "only exists in arch/arm64" (along with "arm,cortex-a53-pmu")?
Absolutely. And yet this is describing the HW, not the shortcomings of
the kernel. I want to be able to take the same DT and run it on the
64bit kernel.
> P.S.
> Yes, I remember you posted some related patches in a past yet they never hit mainline :(
Will wanted me to repaint the whole of the 32bit perf code. I may end-up
doing that in the future if I get some idle time (but don't hold your
breath).
M.
--
Jazz is not dead. It just smells funny...
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next prev parent reply other threads:[~2019-07-24 10:41 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-17 21:16 [PATCH RFC 14/18] HACK: pinctrl: bcm2835: Implement legacy pull for BCM7211 Stefan Wahren
2019-07-17 21:16 ` [PATCH RFC 15/18] spi: bcm2835: enable shared interrupt support Stefan Wahren
2019-07-18 12:42 ` Mark Brown
2019-07-18 17:53 ` Stefan Wahren
2019-07-18 18:05 ` Florian Fainelli
2019-07-18 18:21 ` Stefan Wahren
2019-07-24 17:15 ` Mark Brown
2019-07-18 18:52 ` Mark Brown
2019-07-17 21:16 ` [PATCH RFC 16/18] dt-bindings: bcm: Add Raspberry Pi 4 B Stefan Wahren
2019-07-17 21:16 ` [PATCH RFC 17/18] ARM: bcm2835: Add bcm2838 compatible string Stefan Wahren
2019-07-17 21:16 ` [PATCH RFC 18/18] ARM: dts: Add minimal Raspberry Pi 4 support Stefan Wahren
2019-07-17 21:22 ` Florian Fainelli
2019-07-17 21:32 ` Stefan Wahren
2019-07-23 18:13 ` Marc Zyngier
2019-07-24 9:51 ` Vladimir Murzin
2019-07-24 10:41 ` Marc Zyngier [this message]
2019-07-24 12:36 ` Vladimir Murzin
2019-07-24 19:04 ` Stefan Wahren
2019-07-28 10:58 ` Stefan Wahren
2019-07-28 11:38 ` Marc Zyngier
2019-07-30 18:33 ` Stefan Wahren
2019-07-31 10:55 ` Marc Zyngier
2019-08-02 22:12 ` [PATCH RFC 14/18] HACK: pinctrl: bcm2835: Implement legacy pull for BCM7211 Linus Walleij
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