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drm/amdkfd: add debug set exceptions enabled operation 

The debugger subscibes to nofication for requested exceptions on attach.
Allow the debugger to change its subsciption later on.

Signed-off-by: Jonathan Kim <jonathan.kim@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jonathan Kim 2022-04-27 10:24:37 -04:00 committed by Alex Deucher
parent 12fb1ad70d
commit e90bf919f7
3 changed files with 41 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
View File

@ -2980,6 +2980,9 @@ static int kfd_ioctl_set_debug_trap(struct file *filep, struct kfd_process *p, v
args->send_runtime_event.exception_mask);
break;
case KFD_IOC_DBG_TRAP_SET_EXCEPTIONS_ENABLED:
kfd_dbg_set_enabled_debug_exception_mask(target,
args->set_exceptions_enabled.exception_mask);
break;
case KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_OVERRIDE:
case KFD_IOC_DBG_TRAP_SET_WAVE_LAUNCH_MODE:
case KFD_IOC_DBG_TRAP_SUSPEND_QUEUES:

36
drivers/gpu/drm/amd/amdkfd/kfd_debug.c
View File

@ -521,3 +521,39 @@ int kfd_dbg_trap_enable(struct kfd_process *target, uint32_t fd,
return r;
}
void kfd_dbg_set_enabled_debug_exception_mask(struct kfd_process *target,
uint64_t exception_set_mask)
{
uint64_t found_mask = 0;
struct process_queue_manager *pqm;
struct process_queue_node *pqn;
static const char write_data = '.';
loff_t pos = 0;
int i;
mutex_lock(&target->event_mutex);
found_mask |= target->exception_status;
pqm = &target->pqm;
list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
if (!pqn)
continue;
found_mask |= pqn->q->properties.exception_status;
}
for (i = 0; i < target->n_pdds; i++) {
struct kfd_process_device *pdd = target->pdds[i];
found_mask |= pdd->exception_status;
}
if (exception_set_mask & found_mask)
kernel_write(target->dbg_ev_file, &write_data, 1, &pos);
target->exception_enable_mask = exception_set_mask;
mutex_unlock(&target->event_mutex);
}

2
drivers/gpu/drm/amd/amdkfd/kfd_debug.h
View File

@ -56,6 +56,8 @@ static inline bool kfd_dbg_is_per_vmid_supported(struct kfd_node *dev)
void debug_event_write_work_handler(struct work_struct *work);
void kfd_dbg_set_enabled_debug_exception_mask(struct kfd_process *target,
uint64_t exception_set_mask);
/*
* If GFX off is enabled, chips that do not support RLC restore for the debug
* registers will disable GFX off temporarily for the entire debug session.