Re: [PATCH v21 0/4] arm64/perf: Enable branch stack sampling

On Tue, May 6, 2025 at 9:47 AM Jonathan Cameron
[off-list ref] wrote:

On Mon, 07 Apr 2025 12:41:29 -0500
"Rob Herring (Arm)" [off-list ref] wrote:

quoted

This series enables perf branch stack sampling support on arm64 via a
v9.2 arch feature called Branch Record Buffer Extension (BRBE). Details
on BRBE can be found in the Arm ARM[1] chapter D18.

I've picked up this series from Anshuman. v19 and v20 versions have been
reworked quite a bit by Mark and myself. The bulk of those changes are
in patch 4.

A git branch is here[2].

[1] https://developer.arm.com/documentation/ddi0487/latest/
[2] git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git arm/brbe-v21

Hi Rob,

Expecting any changes on this?  Anything specific we can do to help then shout.

I hope not. Still waiting on Mark R's review though... I'm sure there
will be something and since perf drivers seemingly only get reviewed
once a cycle, I guess it will be another cycle... Sigh.

Rob