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drm/amdkfd: Block per-queue reset when halt_if_hws_hang=1

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commit f214b7beb00621b983e67ce97477afc3ab4b38f4 upstream.

The purpose of halt_if_hws_hang is to preserve GPU state for driver
debugging when queue preemption fails. Issuing per-queue reset may
kill wavefronts which caused the preemption failure.

Signed-off-by: Jay Cornwall <jay.cornwall@amd.com>
Reviewed-by: Jonathan Kim <Jonathan.Kim@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.12.x
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jay Cornwall
2025-01-16 14:36:39 -06:00
committed by Greg Kroah-Hartman
parent 89dcc75d51
commit 4d23b42a45
1 changed files with 2 additions and 2 deletions
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drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+2 -2
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@@ -2290,9 +2290,9 @@ static int unmap_queues_cpsch(struct device_queue_manager *dqm,
*/
mqd_mgr = dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ];
if (mqd_mgr->check_preemption_failed(mqd_mgr, dqm->packet_mgr.priv_queue->queue->mqd)) {
while (halt_if_hws_hang)
schedule();
if (reset_queues_on_hws_hang(dqm)) {
while (halt_if_hws_hang)
schedule();
dqm->is_hws_hang = true;
kfd_hws_hang(dqm);
retval = -ETIME;