This patch adds a new kernel module parameter to amdkfd, called send_sigterm.
This parameter specifies whether amdkfd should send the SIGTERM signal to an HSA process, when the following conditions occur:
1. The GPU triggers an exception regarding a kernel that was issued by this process.
2. The HSA process isn't waiting on an event that handles this exception.
The default behavior is not to send a SIGTERM and suffice with a dmesg error print.
Reviewed-by: Ben Goz ben.goz@amd.com Signed-off-by: Oded Gabbay oded.gabbay@gmail.com --- drivers/gpu/drm/amd/amdkfd/kfd_events.c | 12 +++++++++--- drivers/gpu/drm/amd/amdkfd/kfd_module.c | 5 +++++ drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 6 ++++++ 3 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.c b/drivers/gpu/drm/amd/amdkfd/kfd_events.c index f0a3f4e..2f3ebc5 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_events.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.c @@ -861,10 +861,16 @@ static void lookup_events_by_type_and_signal(struct kfd_process *p,
/* Send SIGTERM no event of type "type" has been found*/ if (send_signal) { - dev_warn(kfd_device, - "Sending SIGTERM to HSA Process with PID %d ", + if (send_sigterm) { + dev_warn(kfd_device, + "Sending SIGTERM to HSA Process with PID %d ", + p->lead_thread->pid); + send_sig(SIGTERM, p->lead_thread, 0); + } else { + dev_err(kfd_device, + "HSA Process (PID %d) got unhandled exception", p->lead_thread->pid); - send_sig(SIGTERM, p->lead_thread, 0); + } } }
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_module.c b/drivers/gpu/drm/amd/amdkfd/kfd_module.c index 4e0a68f..e4fc96e 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_module.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_module.c @@ -54,6 +54,11 @@ module_param(max_num_of_queues_per_device, int, 0444); MODULE_PARM_DESC(max_num_of_queues_per_device, "Maximum number of supported queues per device (1 = Minimum, 4096 = default)");
+int send_sigterm; +module_param(send_sigterm, int, 0444); +MODULE_PARM_DESC(send_sigterm, + "Send sigterm to HSA process on unhandled exception (0 = disable, 1 = enable)"); + bool kgd2kfd_init(unsigned interface_version, const struct kgd2kfd_calls **g2f) { /* diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index 9383494..b6f838f 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -74,6 +74,12 @@ extern int max_num_of_queues_per_device; /* Kernel module parameter to specify the scheduling policy */ extern int sched_policy;
+/* + * Kernel module parameter to specify whether to send sigterm to HSA process on + * unhandled exception + */ +extern int send_sigterm; + /** * enum kfd_sched_policy *