linux-kernel - Re: [PATCH v2 2/2] Intel-IOMMU, intr-remap: source-id checking

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Message-ID: <20090520094310.GF9835@amd.com>
Date:	Wed, 20 May 2009 11:43:10 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Weidong Han <weidong.han@...el.com>, dwmw2@...radead.org,
	suresh.b.siddha@...el.com, linux-kernel@...r.kernel.org,
	iommu@...ts.linux-foundation.org, kvm@...r.kernel.org
Subject: Re: [PATCH v2 2/2] Intel-IOMMU, intr-remap: source-id checking

On Wed, May 20, 2009 at 10:21:14AM +0200, Ingo Molnar wrote:
> 
> * Eric W. Biederman <ebiederm@...ssion.com> wrote:
> > Being a major nitpick, I have to point out that the code is not 
> > structured to support other iommus, and I think AMD has one that 
> > can do this as well.
> 
> (Joerg Cc:-ed)

The AMD IOMMU does also have an interrupt remapping feature. But it is
currently unsupported in the Linux driver. When this is going to be
implemented I think we can go the same way as for device passthrough in
KVM. This was an Intel-only feature too and was later adapted to support
AMD IOMMU too.

Joerg

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