From: Philip Yang <Philip.Yang@amd.com>
Date: Thu, 15 Apr 2021 14:08:58 +0000 (-0400)
Subject: drm/amdkfd: flush TLB after updating GPU page table
X-Git-Tag: v5.14-rc1~41^2~24^2~84
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=1704ac8e439e3dcf97431e268bd64fde1874d807;p=linux-block.git

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 d9111fea724b..a165e51c4a1c 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;