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

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On 2023-08-22 11:41, Deucher, Alexander wrote:
[Public]

-----Original Message-----
From: Sasha Levin <sashal@xxxxxxxxxx>
Sent: Tuesday, August 22, 2023 7:37 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 5.15 6/6] 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.

I agree. I was about to comment in the 5.10 patch as well.

Regards,
  Felix



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 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



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