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| author | Jay Cornwall <[email protected]> | 2019-07-23 00:21:13 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2019-07-31 04:22:02 +0000 |
| commit | 7c2eaf5cdb8797bae792fb3cd96ebc6c7f3c53e7 (patch) | |
| tree | 346f2bff9a2677e273f8a2ea39b5e34e772f9b43 /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | drm/amdkfd: Use SQC when TCP would fail in gfx9 context save. (diff) | |
| download | kernel-7c2eaf5cdb8797bae792fb3cd96ebc6c7f3c53e7.tar.gz kernel-7c2eaf5cdb8797bae792fb3cd96ebc6c7f3c53e7.zip | |
drm/amdkfd: Fix lost single step exceptions in gfx9 trap handler
If the trap is entered due to MODE.DEBUG_EN=1 and SAVECTX is raised
concurrently the handler cannot identify the source of the exception.
This causes the debugger to lose single step exception notification
when a context save request arrives at the same time.
When MODE.DEBUG_EN=1 and STATUS.HALT=0 (exception not already handled)
jump to the second-level trap handler upon entering the trap. The
second-level trap will set STATUS.HALT=1 and return to the shader.
If SAVECTX was raised then control flow will return to the trap, which
will then handle the context save request.
Cc: Tony Tye <[email protected]>
Cc: Laurent Morichetti <[email protected]>
Cc: Qingchuan Shi <[email protected]>
Signed-off-by: Jay Cornwall <[email protected]>
Reviewed-by: Laurent Morichetti <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions