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

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Message-ID: <20200904100556.GU6714@8bytes.org>
Date:   Fri, 4 Sep 2020 12:05:56 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     "Deucher, Alexander" <Alexander.Deucher@....com>
Cc:     "jroedel@...e.de" <jroedel@...e.de>,
        "Kuehling, Felix" <Felix.Kuehling@....com>,
        "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

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.

Regards,

	Joerg