linux-kernel - RE: [PATCH AUTOSEL 5.15 6/6] drm/amdkfd: ignore crat by default

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Message-ID: <BN9PR12MB5146C0787341AD0E46FBAF2CF71FA@BN9PR12MB5146.namprd12.prod.outlook.com>
Date:   Tue, 22 Aug 2023 15:41:20 +0000
From:   "Deucher, Alexander" <Alexander.Deucher@....com>
To:     Sasha Levin <sashal@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     "Kuehling, Felix" <Felix.Kuehling@....com>,
        "Koenig, Christian" <Christian.Koenig@....com>,
        Mike Lothian <mike@...eburn.co.uk>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        "airlied@...il.com" <airlied@...il.com>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
Subject: RE: [PATCH AUTOSEL 5.15 6/6] drm/amdkfd: ignore crat by default

[Public]

> -----Original Message-----
> From: Sasha Levin <sashal@...nel.org>
> Sent: Tuesday, August 22, 2023 7:37 AM
> To: linux-kernel@...r.kernel.org; stable@...r.kernel.org
> Cc: Deucher, Alexander <Alexander.Deucher@....com>; Kuehling, Felix
> <Felix.Kuehling@....com>; Koenig, Christian <Christian.Koenig@....com>;
> Mike Lothian <mike@...eburn.co.uk>; Sasha Levin <sashal@...nel.org>; Pan,
> Xinhui <Xinhui.Pan@....com>; airlied@...il.com; daniel@...ll.ch; amd-
> gfx@...ts.freedesktop.org; dri-devel@...ts.freedesktop.org
> Subject: [PATCH AUTOSEL 5.15 6/6] drm/amdkfd: ignore crat by default
>
> From: Alex Deucher <alexander.deucher@....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@....com>
> Acked-by: Christian König <christian.koenig@....com>
> Tested-by: Mike Lothian <mike@...eburn.co.uk>
> Signed-off-by: Alex Deucher <alexander.deucher@....com>
> Signed-off-by: Sasha Levin <sashal@...nel.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