Date: Fri, 11 Jul 2008 16:11:24 +0200
From: Joerg Roedel <joerg.roedel@amd.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
CC: tglx@linutronix.de, mingo@redhat.com, linux-kernel@vger.kernel.org,
       iommu@lists.linux-foundation.org, bhavna.sarathy@amd.com,
       Sebastian.Biemueller@amd.com, robert.richter@amd.com, joro@8bytes.org
Subject: Re: [PATCH 00/34] AMD IOMMU driver
Message-ID: <20080711141124.GU14977@amd.com>
References: <1214508490-29683-1-git-send-email-joerg.roedel@amd.com> <m1d4lk90vq.fsf@frodo.ebiederm.org>
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On Fri, Jul 11, 2008 at 03:22:01AM -0700, Eric W. Biederman wrote:
> Joerg Roedel <joerg.roedel@amd.com> writes:
> 
> > Hi,
> >
> > this is the first post of the initial driver for AMD IOMMU hardware. The driver
> > is tested on hardware with various loads (disk and network) and showed no
> > problems.
> >
> > It currently supports DMA remapping using the dma_ops API in the x86
> > architecture code. It also supports isolation of device DMA address spaces as
> > far as the hardware allows that (means each device can get its own DMA address
> > space and can't access the DMA memory of other devices).
> >
> > Please give this code a good review and send me your comments about it so that
> > I can fix all possible bugs and objections and move this driver forward to
> > merging quality.
> 
> 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?

Yes, AMD IOMMU also has interrupt remapping support.

> Assuming their is irq remapping support it isn't tied to x2apic
> support in the cpus is it?

Not sure what you mean here. I am not aware of an x2apic on AMD.

Joerg

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