[PATCH v2] amdkfd: pass debug exceptions to second-level trap handler

[Laurent Morichetti]

Call the 2nd level trap handler if the cwsr handler is entered with any
one of wave_start, wave_end, or trap_after_inst exceptions.

Signed-off-by: Laurent Morichetti <laurent.morichetti at amd.com>
Tested-by: Lancelot Six <lancelot.six at amd.com>
Reviewed-by: Jay Cornwall <jay.cornwall at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler.h  |  2 +-
 .../drm/amd/amdkfd/cwsr_trap_handler_gfx10.asm  | 17 ++++++++++++++++-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler.h b/drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler.h
index d1caaf0e6a7c..2e9b64edb8d2 100644
--- a/drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler.h
+++ b/drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler.h
@@ -2518,7 +2518,7 @@ static const uint32_t cwsr_trap_gfx11_hex[] = {
 	0x8b6eff7b, 0x00000400,
 	0xbfa20045, 0xbf830010,
 	0xb8fbf803, 0xbfa0fffa,
-	0x8b6eff7b, 0x00000900,
+	0x8b6eff7b, 0x00160900,
 	0xbfa20015, 0x8b6eff7b,
 	0x000071ff, 0xbfa10008,
 	0x8b6fff7b, 0x00007080,
diff --git a/drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler_gfx10.asm b/drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler_gfx10.asm
index 71b3dc0c7363..7568ff3af978 100644
--- a/drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler_gfx10.asm
+++ b/drivers/gpu/drm/amd/amdkfd/cwsr_trap_handler_gfx10.asm
@@ -81,6 +81,11 @@ var SQ_WAVE_TRAPSTS_POST_SAVECTX_SHIFT		= 11
 var SQ_WAVE_TRAPSTS_POST_SAVECTX_SIZE		= 21
 var SQ_WAVE_TRAPSTS_ILLEGAL_INST_MASK		= 0x800
 var SQ_WAVE_TRAPSTS_EXCP_HI_MASK		= 0x7000
+#if ASIC_FAMILY >= CHIP_PLUM_BONITO
+var SQ_WAVE_TRAPSTS_WAVE_START_MASK		= 0x20000
+var SQ_WAVE_TRAPSTS_WAVE_END_MASK		= 0x40000
+var SQ_WAVE_TRAPSTS_TRAP_AFTER_INST_MASK	= 0x100000
+#endif
 
 var SQ_WAVE_MODE_EXCP_EN_SHIFT			= 12
 var SQ_WAVE_MODE_EXCP_EN_ADDR_WATCH_SHIFT	= 19
@@ -92,6 +97,16 @@ var SQ_WAVE_IB_STS_RCNT_FIRST_REPLAY_MASK	= 0x003F8000
 
 var SQ_WAVE_MODE_DEBUG_EN_MASK			= 0x800
 
+#if ASIC_FAMILY < CHIP_PLUM_BONITO
+var S_TRAPSTS_NON_MASKABLE_EXCP_MASK		= SQ_WAVE_TRAPSTS_MEM_VIOL_MASK|SQ_WAVE_TRAPSTS_ILLEGAL_INST_MASK
+#else
+var S_TRAPSTS_NON_MASKABLE_EXCP_MASK		= SQ_WAVE_TRAPSTS_MEM_VIOL_MASK		|\
+						  SQ_WAVE_TRAPSTS_ILLEGAL_INST_MASK	|\
+						  SQ_WAVE_TRAPSTS_WAVE_START_MASK	|\
+						  SQ_WAVE_TRAPSTS_WAVE_END_MASK		|\
+						  SQ_WAVE_TRAPSTS_TRAP_AFTER_INST_MASK
+#endif
+
 // bits [31:24] unused by SPI debug data
 var TTMP11_SAVE_REPLAY_W64H_SHIFT		= 31
 var TTMP11_SAVE_REPLAY_W64H_MASK		= 0x80000000
@@ -224,7 +239,7 @@ L_NOT_HALTED:
 	// Check non-maskable exceptions. memory_violation, illegal_instruction
 	// and xnack_error exceptions always cause the wave to enter the trap
 	// handler.
-	s_and_b32	ttmp2, s_save_trapsts, SQ_WAVE_TRAPSTS_MEM_VIOL_MASK|SQ_WAVE_TRAPSTS_ILLEGAL_INST_MASK
+	s_and_b32	ttmp2, s_save_trapsts, S_TRAPSTS_NON_MASKABLE_EXCP_MASK
 	s_cbranch_scc1	L_FETCH_2ND_TRAP
 
 	// Check for maskable exceptions in trapsts.excp and trapsts.excp_hi.

base-commit: c4b562a17829454713e45219fa754be1bfda9004
-- 
2.25.1