drm/amdkfd: gfx12 context save/restore trap handler fixes

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Fix LDS size interpretation: 512 bytes (>= gfx12) vs 256 (< gfx12).

Ensure STATE_PRIV.BARRIER_COMPLETE cannot change after reading or
before writing. Other waves in the threadgroup may cause this field
to assert if they complete the barrier.

Do not overwrite EXCP_FLAG_PRIV.{SAVE_CONTEXT,HOST_TRAP} when
restoring this register. Both of these fields can assert while the
wavefront is running the trap handler.

Signed-off-by: Jay Cornwall <jay.cornwall@amd.com>
Reviewed-by: Lancelot Six <lancelot.six@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Jay Cornwall 2024-05-23 09:00:28 -05:00 • committed by Alex Deucher

parent 813e7d4cd0

commit fda812ebe3

2 changed files with 639 additions and 607 deletions

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1239

drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler.h

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55

drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler_gfx10.asm

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