RE: [PATCH AUTOSEL 6.4 09/11] drm/amdkfd: ignore crat by default

[Deucher, Alexander]

[Public]

> -----Original Message-----
> From: Sasha Levin <sashal@xxxxxxxxxx>
> Sent: Tuesday, August 22, 2023 7:36 AM
> To: linux-kernel@xxxxxxxxxxxxxxx; stable@xxxxxxxxxxxxxxx
> Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Kuehling, Felix
> <Felix.Kuehling@xxxxxxx>; Koenig, Christian <Christian.Koenig@xxxxxxx>;
> Mike Lothian <mike@xxxxxxxxxxxxxx>; Sasha Levin <sashal@xxxxxxxxxx>; Pan,
> Xinhui <Xinhui.Pan@xxxxxxx>; airlied@xxxxxxxxx; daniel@xxxxxxxx; amd-
> gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Subject: [PATCH AUTOSEL 6.4 09/11] drm/amdkfd: ignore crat by default
>
> From: Alex Deucher <alexander.deucher@xxxxxxx>
>
> [ Upstream commit a6dea2d64ff92851e68cd4e20a35f6534286e016 ]
>
> We are dropping the IOMMUv2 path, so no need to enable this.
> It's often buggy on consumer platforms anyway.
>

This is not needed for stable.

Alex


> Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
> Acked-by: Christian König <christian.koenig@xxxxxxx>
> Tested-by: Mike Lothian <mike@xxxxxxxxxxxxxx>
> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
> ---
>  drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 4 ----
>  1 file changed, 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> index 475e470273540..ee0cc35d68a84 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> @@ -1543,11 +1543,7 @@ static bool kfd_ignore_crat(void)
>       if (ignore_crat)
>               return true;
>
> -#ifndef KFD_SUPPORT_IOMMU_V2
>       ret = true;
> -#else
> -     ret = false;
> -#endif
>
>       return ret;
>  }
> --
> 2.40.1