drm/amdkfd: flush TLB after updating GPU page table

To workaround the situation that vm retry fault keep coming after page
table update. We are investigating the root cause, but once this issue
happens, application will stuck and sometimes have to reboot to recover.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index d9111fea724b3a64253366c17c929f3f96e2ec57..a165e51c4a1cb56cd12d69108c1c5ae13e7598d1 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -1225,6 +1225,9 @@ static int svm_range_map_to_gpus(struct svm_range *prange,
                                break;
                        }
                }
+
+               amdgpu_amdkfd_flush_gpu_tlb_pasid((struct kgd_dev *)adev,
+                                                 p->pasid);
        }
 
        return r;