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

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Date:   Fri, 28 Aug 2020 17:29:43 +0200
From:   "jroedel@...e.de" <jroedel@...e.de>
To:     "Deucher, Alexander" <Alexander.Deucher@....com>
Cc:     "Kuehling, Felix" <Felix.Kuehling@....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

On Fri, Aug 28, 2020 at 03:11:32PM +0000, Deucher, Alexander wrote:
> There are hw bugs on Raven and probably Carrizo/Stoney where they need
> 1:1 mapping to avoid bugs in some corner cases with the displays.
> Other GPUs should be fine.  The VIDs is 0x1002 and the DIDs are 0x15dd
> and 0x15d8 for raven variants and 0x9870, 0x9874, 0x9875, 0x9876,
> 0x9877 and 0x98e4 for carrizo and stoney.  As long as we
> preserve the 1:1 mapping for those asics, we should be fine.

Okay, Stoney at least has no Zen-based CPU, so no support for memory
encryption anyway. How about Raven, is it paired with a Zen CPU?

Regards,

	Joerg