drm/panthor: Evict groups before VM termination

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[ Upstream commit 565ed40b5f ]

Ensure all related groups are evicted and suspended before VM
destruction takes place.

This fixes an issue where panthor_vm_destroy() destroys and unmaps the
heap context while there are still on slot groups using this.
The FW will do a write out to the heap context when a CSG (group) is
suspended, so a premature unmap of the heap context will cause a
GPU page fault.
This page fault is quite harmless, and do not affect the continued
operation of the GPU.

Fixes: 647810ec24 ("drm/panthor: Add the MMU/VM logical block")
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Ketil Johnsen <ketil.johnsen@arm.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patch.msgid.link/20251219093546.1227697-1-ketil.johnsen@arm.com
Co-developed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

Ketil Johnsen 2025-12-19 10:35:44 +01:00 • committed by Sasha Levin

parent d12be704f7

commit b78e8a12ed

3 changed files with 19 additions and 0 deletions

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4

drivers/gpu/drm/panthor/panthor_mmu.c

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14

drivers/gpu/drm/panthor/panthor_sched.c

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1

drivers/gpu/drm/panthor/panthor_sched.h

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