drm/panthor: Make sure caches are flushed/invalidated when an AS is recycled

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When we re-assign a slot to a different VM, we need to make sure the
old VM caches are flushed before doing the switch. Specialize
panthor_mmu_as_disable() so we can skip the slot programmation while
still getting the cache flushing, and call this helper from
panthor_vm_active() when an idle slot is recycled.

v2:
- Collect R-bs

Fixes: 6e2d3b3e85 ("drm/panthor: Add support for atomic page table updates")
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patch.msgid.link/20251203121750.404340-3-boris.brezillon@collabora.com

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Boris Brezillon 2025-12-03 13:17:49 +01:00 • committed by Liviu Dudau

parent 657803cbca

commit 32e593d74c

1 changed files with 20 additions and 6 deletions

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drivers/gpu/drm/panthor/panthor_mmu.c

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