RE: [PATCH 0/2] iommu/amd: Fix IOMMUv2 devices when SME is active

[Deucher, Alexander]

[AMD Public Use]

> -----Original Message-----
> From: jroedel@xxxxxxx <jroedel@xxxxxxx>
> Sent: Friday, August 28, 2020 11:30 AM
> To: Deucher, Alexander <Alexander.Deucher@xxxxxxx>
> Cc: Kuehling, Felix <Felix.Kuehling@xxxxxxx>; Joerg Roedel
> <joro@xxxxxxxxxx>; iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx; Huang, Ray
> <Ray.Huang@xxxxxxx>; Koenig, Christian <Christian.Koenig@xxxxxxx>;
> Lendacky, Thomas <Thomas.Lendacky@xxxxxxx>; Suthikulpanit, Suravee
> <Suravee.Suthikulpanit@xxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx
> 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?

Ah, right,  So CZ and ST are not an issue.  Raven is paired with Zen based CPUs.

Thanks,

Alex