drm/amdkfd: use node XCC count for v9 CRIU control stack restore

Browse source

set_queue_properties_from_criu() divided the checkpointed control stack
size by NUM_XCC(adev->gfx.xcc_mask) (whole GPU), while the checkpoint
size was recorded, the MQD buffer allocated, and the control stack
restored using the per-node mask NUM_XCC(mm->dev->xcc_mask). On spatially
partitioned GFX9.4.3 (CPX/QPX) these differ, so the per-XCC control stack
size used for the restore memcpy could exceed the region sized for the
MQD allocation, writing past the BO into adjacent kernel memory; it also
broke legitimate restore on partitioned parts.

Divide by the per-node XCC count so allocation and copy agree,
leaving kfd_queue_acquire_buffers() to bound the size against
the node's advertised control stack size.

Signed-off-by: Yongqiang Sun <Yongqiang.Sun@amd.com>
Reviewed-by: David Francis <David.Francis@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Yongqiang Sun 2026-06-23 15:24:11 -04:00 • committed by Alex Deucher

parent 808481e5fb

commit 1a0aa3c4cb

1 changed files with 1 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c

View file