linux-kernel - Re: [PATCH 0/2] iommu/amd: Fix IOMMUv2 devices when SME is active

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Message-ID: <61776061-9f26-a3bc-9776-0d1772e2b266@amd.com>
Date:   Mon, 7 Sep 2020 23:38:14 -0400
From:   Felix Kuehling <felix.kuehling@....com>
To:     "Deucher, Alexander" <Alexander.Deucher@....com>,
        Joerg Roedel <joro@...tes.org>
Cc:     "jroedel@...e.de" <jroedel@...e.de>,
        "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        "Huang, Ray" <Ray.Huang@....com>,
        "Koenig, Christian" <Christian.Koenig@....com>,
        "Lendacky, Thomas" <Thomas.Lendacky@....com>,
        "Suthikulpanit, Suravee" <Suravee.Suthikulpanit@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] iommu/amd: Fix IOMMUv2 devices when SME is active

Am 2020-09-06 um 12:08 p.m. schrieb Deucher, Alexander:
> [AMD Official Use Only - Internal Distribution Only]
>
>> -----Original Message-----
>> From: Joerg Roedel <joro@...tes.org>
>> Sent: Friday, September 4, 2020 6:06 AM
>> To: Deucher, Alexander <Alexander.Deucher@....com>
>> Cc: jroedel@...e.de; Kuehling, Felix <Felix.Kuehling@....com>;
>> iommu@...ts.linux-foundation.org; Huang, Ray <Ray.Huang@....com>;
>> Koenig, Christian <Christian.Koenig@....com>; Lendacky, Thomas
>> <Thomas.Lendacky@....com>; Suthikulpanit, Suravee
>> <Suravee.Suthikulpanit@....com>; linux-kernel@...r.kernel.org
>> Subject: Re: [PATCH 0/2] iommu/amd: Fix IOMMUv2 devices when SME is
>> active
>>
>> On Fri, Aug 28, 2020 at 03:47:07PM +0000, Deucher, Alexander wrote:
>>> Ah, right,  So CZ and ST are not an issue.  Raven is paired with Zen based
>> CPUs.
>>
>> Okay, so for the Raven case, can you add code to the amdgpu driver which
>> makes it fail to initialize on Raven when SME is active? There is a global
>> checking function for that, so that shouldn't be hard to do.
>>
> Sure.  How about the attached patch?

The patch is

Acked-by: Felix Kuehling <Felix.Kuehling@....com>

Thanks,
  Felix


>
> Alex
>