drm/xe/pf: Invalidate LMTT after completing changes

Once we finish populating all leaf pages in the VF's LMTT we should
make sure that hardware will not access any stale data. Explicitly
force LMTT invalidation (as it was already planned in the past).

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Piotr Piórkowski <piotr.piorkowski@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://lore.kernel.org/r/20250711193316.1920-7-michal.wajdeczko@intel.com

Author: mwajdecz

drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c

@@ -1347,7 +1347,17 @@ static int pf_distribute_config_lmem(struct xe_gt *gt, unsigned int vfid, u64 si
 
 static void pf_force_lmtt_invalidate(struct xe_device *xe)
 {
-	/* TODO */
+	struct xe_lmtt *lmtt;
+	struct xe_tile *tile;
+	unsigned int tid;
+
+	xe_assert(xe, xe_device_has_lmtt(xe));
+	xe_assert(xe, IS_SRIOV_PF(xe));
+
+	for_each_tile(tile, xe, tid) {
+		lmtt = &tile->sriov.pf.lmtt;
+		xe_lmtt_invalidate_hw(lmtt);
+	}
 }
 
 static void pf_reset_vf_lmtt(struct xe_device *xe, unsigned int vfid)