From 35db96e6f61dd000a38f73c7c4a405a73bfe0f60 Mon Sep 17 00:00:00 2001 From: Philip Yang Date: Thu, 15 Apr 2021 10:08:58 -0400 Subject: [PATCH] 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 Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index d9111fea724b3..a165e51c4a1cb 100644 --- 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; -- 2.39.5