Am 2021-06-30 um 7:26 p.m. schrieb Eric Huang:
> It is based on reverting two patches back.
>   drm/amdkfd: Make TLB flush conditional on mapping
>   drm/amdgpu: Add table_freed parameter to amdgpu_vm_bo_update
>
> Signed-off-by: Eric Huang <jinhuieric.hu...@amd.com>

I hope we'll be able to change this condition if firmware fixes become
available. I think eventually this should only be needed for Vega20
XGMI. For now, this patch is

Reviewed-by: Felix Kuehling <felix.kuehl...@amd.com>


> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c 
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> index a6c01d624246..13fcef6836d2 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
> @@ -1845,6 +1845,12 @@ int amdgpu_amdkfd_gpuvm_map_memory_to_gpu(
>                               true);
>       ret = unreserve_bo_and_vms(&ctx, false, false);
>  
> +     /* Only apply no TLB flush on Aldebaran to
> +      * workaround regressions on other Asics.
> +      */
> +     if (table_freed && (adev->asic_type != CHIP_ALDEBARAN))
> +             *table_freed = true;
> +
>       goto out;
>  
>  out_unreserve:
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