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Subject: RE: [PATCH 00/34] AMD IOMMU driver
Date: Fri, 11 Jul 2008 11:23:46 -0500
Message-ID: <6453C3CB8E2B3646B0D020C1126132730149A6C6@sausexmb4.amd.com>
In-Reply-To: <m1d4lk90vq.fsf@frodo.ebiederm.org>
Thread-topic: [PATCH 00/34] AMD IOMMU driver
Thread-index: Acjjb+D9/QRR/Zp2Rxm28fDRDFIgdQAAW7mw
From: "Duran, Leo" <leo.duran@amd.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>,
       "Roedel, Joerg" <Joerg.Roedel@amd.com>
CC: "Richter, Robert" <rrichter@elbe.amd.com>,
       "Biemueller, Sebastian" <Sebastian.Biemueller@amd.com>,
       <linux-kernel@vger.kernel.org>, <iommu@lists.linux-foundation.org>,
       <mingo@redhat.com>, <tglx@linutronix.de>,
       "Sarathy, Bhavna" <Bhavna.Sarathy@amd.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 907
Lines: 24

On Friday, July 11, 2008 5:22 AM, Eric W. Biederman wrote:

> Small question.  Does this IOMMU also support irq remapping?
> 
> Intel is starting to merge support for their iommu that supports irq
> remapping and I am curious what the implications are going to be to
> support both of these iommus?
> 
> Assuming their is irq remapping support it isn't tied to x2apic
> support in the cpus is it?
> 
Follow-up questions: 
(1) Outside of a virtualization environment, is there functional value
for "irq remapping" by an IOMMU? And, if there is, (2) How would this
functionality get abstracted? (e.g., as dma_ops abstracts 'address
remapping' by the IOMMU)

Leo.

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