[PATCH AUTOSEL 5.15 6/6] drm/amdkfd: ignore crat by default

[Deucher, Alexander]

[Public]

> -----Original Message-----
> From: Sasha Levin <sashal at kernel.org>
> Sent: Tuesday, August 22, 2023 7:37 AM
> To: linux-kernel at vger.kernel.org; stable at vger.kernel.org
> Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Kuehling, Felix
> <Felix.Kuehling at amd.com>; Koenig, Christian <Christian.Koenig at amd.com>;
> Mike Lothian <mike at fireburn.co.uk>; Sasha Levin <sashal at kernel.org>; Pan,
> Xinhui <Xinhui.Pan at amd.com>; airlied at gmail.com; daniel at ffwll.ch; amd-
> gfx at lists.freedesktop.org; dri-devel at lists.freedesktop.org
> Subject: [PATCH AUTOSEL 5.15 6/6] drm/amdkfd: ignore crat by default
>
> From: Alex Deucher <alexander.deucher at amd.com>
>
> [ 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 at amd.com>
> Acked-by: Christian König <christian.koenig at amd.com>
> Tested-by: Mike Lothian <mike at fireburn.co.uk>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> Signed-off-by: Sasha Levin <sashal at kernel.org>
> ---
>  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 e574aa32a111d..46dfd9baeb013 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
> @@ -1523,11 +1523,7 @@ 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