drm/amdgpu: implement per-process MES context

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MES process context is a process-level page
where process specific context is saved for
MES scheduler.

However, current user-queue code path assigns
fw_obj of a queue to MES process_context_addr
when adding the queue to MES.

This means every new queue from the same process
would replace the previous process context address
with that queue's fw_obj address.
What's worse is, when user space frees a queue,
its fw_obj will be freed as well, causing MES
working on a NULL page pointer.

This issue leads to inconsistency and crash
in the scheduler.

This commit allocates a process-level page for
MES process contexts for a process other than queue-level

Signed-off-by: Zhu Lingshan <lingshan.zhu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Zhu Lingshan 2026-06-12 14:02:49 +08:00 • committed by Alex Deucher

parent 9d748a8ac1

commit 97bcaf15ad

3 changed files with 47 additions and 12 deletions

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6

drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c

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2

drivers/gpu/drm/amd/amdgpu/amdgpu_userq.h

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51

drivers/gpu/drm/amd/amdgpu/mes_userqueue.c

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