From: Neil Armstrong <narmstrong@baylibre.com>
To: Jie Zhang <jzhang918@gmail.com>, linux-amlogic@lists.infradead.org
Cc: Marc Zyngier <marc.zyngier@arm.com>
Subject: Re: PMU support for Amlogic S905D3 in Linux kernel 5.6
Date: Tue, 2 Jun 2020 16:28:55 +0200 [thread overview]
Message-ID: <13db069b-017f-cba6-a260-4ec9e84614b8@baylibre.com> (raw)
In-Reply-To: <CACYR8yO2nLV21F2zp7-Z=uAt1H=FEJsHipfUk_U1pBFAN8H2YA@mail.gmail.com>
Hi,
On 02/06/2020 16:15, Jie Zhang wrote:
> Hi,
>
> I'm using Khadas VIM3L, which has an Amlogic S905D3, with Linux kernel
> 4.9. This Linux kernel has support for PMU for S905D3. But for a test
> case I'm using I saw strange L1D cache misses behavior. I want to redo
> the testing on a more recent kernel version, like 5.6. But it seems
> Linux 5.6 does not have the support for PMU in that processor. Is
> anyone working on this? From Amlogic specific changes to 4.9 kernel,
> it seems we need special handling for this processor. Is there a
> document describing how PMU works in this processor?
AFAIK there is no document describing PMU... but seems Marc Zyngier
was looking over it, I added him as CC.
Neil
>
> Thanks,
> Jie
>
> _______________________________________________
> linux-amlogic mailing list
> linux-amlogic@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-amlogic
>
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prev parent reply other threads:[~2020-06-02 14:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-02 14:15 Jie Zhang
2020-06-02 14:28 ` Neil Armstrong [this message]
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