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

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Date:   Fri, 28 Aug 2020 17:27:59 +0200
From:   "jroedel@...e.de" <jroedel@...e.de>
To:     Felix Kuehling <felix.kuehling@....com>
Cc:     "Deucher, Alexander" <Alexander.Deucher@....com>,
        Joerg Roedel <joro@...tes.org>,
        "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

Hi Felix,

On Fri, Aug 28, 2020 at 09:54:59AM -0400, Felix Kuehling wrote:
> Yes, we're working on this. IOMMUv2 is only needed for KFD. It's not
> needed for graphics. And we're making it optional for KFD as well.

Okay, KFD should fail gracefully because it can't initialize the
device's iommuv2 functionality.


Regards,

	Joerg