Re: [PATCH v3 0/4] New vendor support and optimizations for DWC PCIe PMU

On 8/1/26 7:28 PM, Will Deacon wrote:
> On Wed, 08 Jul 2026 16:45:02 +0800, Yicong Yang wrote:
>> This patchset mainly enable the DWC PCIe PMU on our platform (Patch 1/4).
>> Besides do some optimization and refactor:
>> - Patch 2/4 extend the monitoring limit on platforms with narrowed counter width (< 64 bit)
>> - Patch 3/4 switch the driver to use the faux device interface
>> - Patch 4/4 fix an old issue that PMU may counting when corresponding root port
>>   is runtime suspended.
>>
>> [...]
> 
> Applied first two patches to arm64 (for-next/perf), thanks!
> 
> [1/4] perf/dwc_pcie: Add support for Picoheart vendor devices
>       https://git.kernel.org/arm64/c/cf65b4d765b5
> [2/4] perf/dwc_pcie: Support narrowed time-based counter for long time monitoring
>       https://git.kernel.org/arm64/c/18ec1f543ae1
> 
> I haven't understood what you gain from the third patch. If it's purely
> a dependency for the final patch, then Sashiko has left some comments
> on that one:
> 
> https://lore.kernel.org/all/[email protected]/

sure, will have a further check (these are "pre-existing" issues as reported
by sashiko) and respin a new version for patch 3/4. it's a cleanup found
when adding support for our platform. this driver looks to fall into the case
where faux device aims to cover [1].

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/linux/device/faux.h#n6

thanks.