[PATCH 4/5] drm/xe/vf: Stop applying save-restore MMIOs if VF

[Lucas De Marchi]

On Mon, Mar 03, 2025 at 06:35:21PM +0100, Michal Wajdeczko wrote:
>Currently we are blocking processing of all save-restore rules
>by the VFs inside the xe_rtp_process_to_sr() function, but we
>want to unblock that to allow processing of the LRC WA rules.
>
>To avoid hitting WARNs about reading an inaccessible registers by
>the VFs, stop applying save-restore MMIOs action if VF, without
>relying that SR list will be always empty for the VF.
>
>Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
>Cc: Matt Roper <matthew.d.roper at intel.com>
>---
> drivers/gpu/drm/xe/xe_reg_sr.c | 3 +++
> 1 file changed, 3 insertions(+)
>
>diff --git a/drivers/gpu/drm/xe/xe_reg_sr.c b/drivers/gpu/drm/xe/xe_reg_sr.c
>index 9475e3f74958..fc8447a838c4 100644
>--- a/drivers/gpu/drm/xe/xe_reg_sr.c
>+++ b/drivers/gpu/drm/xe/xe_reg_sr.c
>@@ -173,6 +173,9 @@ void xe_reg_sr_apply_mmio(struct xe_reg_sr *sr, struct xe_gt *gt)

couldn't we simply have a a generic xe_reg_sr_apply_gpu_job()?

If we still need to filter registers, we could probably add tags to the
xa storage... ?

Lucas De Marchi