Re: [PATCH v3 1/2] perf: arm_pmu: Accept a per-device CPU mask from platform data

[sashiko-bot@kernel.org]

> From: "Johnny.Fan" <Johnny.Fan@cixtech.com>
> 
> Synthetic platform devices created from ACPI data have no fwnode, so
> platform_get_irq_affinity() cannot tell which CPUs implement the
> feature and falls back to cpu_possible_mask.
> 
> Add an optional CPU mask to the platform data and make both the SPE and
> the TRBE drivers prefer it over the firmware-described IRQ affinity.
> Device tree devices have no platform data and keep using the affinity.
> 
> TRBE must also pass a stable copy of the mask to
> request_percpu_irq_affinity(), because supported_cpus is pruned as CPUs
> are probed, while the IRQ action keeps a pointer to the mask.
> 
> This is a preparatory change: no ACPI device carries platform data yet,
> so behaviour is unchanged.
> 
> Signed-off-by: Johnny.Fan <Johnny.Fan@cixtech.com>

Sashiko has reviewed this patch and found no issues.

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20261102084153.3975282-1-johnny.fan@cixtech.com?part=1