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author | Jay Cornwall <jay.cornwall@amd.com> | 2019-07-23 03:21:13 +0300 |
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committer | Alex Deucher <alexander.deucher@amd.com> | 2019-07-31 07:22:02 +0300 |
commit | 7c2eaf5cdb8797bae792fb3cd96ebc6c7f3c53e7 (patch) | |
tree | 346f2bff9a2677e273f8a2ea39b5e34e772f9b43 /drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler_gfx10.asm | |
parent | 8c7a5d9e6f141aa48473f15ac271c75688404ba8 (diff) | |
download | linux-7c2eaf5cdb8797bae792fb3cd96ebc6c7f3c53e7.tar.xz |
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 <tony.tye@amd.com>
Cc: Laurent Morichetti <laurent.morichetti@amd.com>
Cc: Qingchuan Shi <qingchuan.shi@amd.com>
Signed-off-by: Jay Cornwall <jay.cornwall@amd.com>
Reviewed-by: Laurent Morichetti <laurent.morichetti@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler_gfx10.asm')
0 files changed, 0 insertions, 0 deletions