[PATCH 2/2] drm/amdkfd: flush TLB after updating GPU page table

[Felix Kuehling]

Am 2021-04-28 um 9:53 p.m. schrieb Philip Yang:
> 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 at amd.com>

This patch is

Reviewed-by: Felix Kuehling <Felix.Kuehling at amd.com>


> ---
>  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 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;