Re: [PATCH 08/11] drm/xe: Prep page reclaim in tlb inval job

[Michal Wajdeczko <michal.wajdeczko@intel.com>]

On 11/18/2025 10:05 AM, Brian Nguyen wrote:
> Use page reclaim list as indicator if page reclaim action is desired and
> pass it to tlb inval fence to handle.
> 
> Job will need to maintain its own embedded copy to ensure lifetime of
> PRL exist until job has run.
> 
> Signed-off-by: Brian Nguyen <brian3.nguyen@intel.com>
> ---

...

>  
> +/**
> + * xe_tlb_inval_job_add_page_reclaim() - Embed PRL into a TLB job
> + * @job: TLB invalidation job that may trigger reclamation
> + * @prl: Page reclaim list populated during unbind
> + *
> + * Copies @prl into the job and takes an extra reference to the entry page so
> + * ownership can transfer to the TLB fence when the job is pushed.
> + */
> +void xe_tlb_inval_job_add_page_reclaim(struct xe_tlb_inval_job *job,
> +				       struct xe_page_reclaim_list *prl)
> +{
> +	struct xe_device *xe = gt_to_xe(job->q->gt);
> +
> +	WARN_ON(!xe->info.has_page_reclaim_hw_assist);

you can use here debug-only:

	xe_gt_assert(job->q->gt, xe->info.has_page_reclaim_hw_assist);

or if you want keep it in production builds:

	xe_gt_WARN_ON(...

> +	job->prl = *prl;
> +	/* Pair with put after bo creation */
> +	xe_page_reclaim_entries_get(job->prl.entries);
> +}
> +