lkml.org 
[lkml]   [2022]   [Mar]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v5 00/10] drivers/perf: CPU PMU driver for Apple M1
On Mon, Mar 07, 2022 at 03:55:44PM +0000, Marc Zyngier wrote:
> On Tue, 08 Feb 2022 18:55:54 +0000,
> Marc Zyngier <maz@kernel.org> wrote:
> >
> > The M1 SoC embeds a per-CPU PMU that has a very different programming
> > interface compared to the architected PMUv3 that is normally present
> > on standard implementations.
> >
> > This small series adds a driver for this HW by leveraging the arm_pmu
> > infrastructure, resulting in a rather simple driver.
> >
> > Of course, we know next to nothing about the actual events this PMU
> > counts, aside from CPU cycles and instructions. Everything else is
> > undocumented (though as Dougall pointed out, someone could extract the
> > relevant information from a macOS install if they wanted -- I don't).
> > I'm looking at allowing the perf userspace tool to load the event
> > descriptions at runtime, which would probably help.
>
> [...]
>
> FWIW, I have created two branches:
>
> - [1] has the full series
> - [2] has the irqchip/DT prefix of [1]
>
> Both branches are stable, and I expect [2] to be used as a shared
> branch between the irqchip and perf trees.

Cheers, I've picked this up in the arm64 tree (by pulling [2] and applying
the two extra patches from [1] on top) here:

https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/perf-m1

Will

\
 
 \ /
  Last update: 2022-03-08 15:11    [W:0.090 / U:0.388 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site