linux-kernel - Re: [PATCH 00/34] AMD IOMMU driver

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Date:	Fri, 11 Jul 2008 03:22:01 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Joerg Roedel <joerg.roedel@....com>
Cc:	tglx@...utronix.de, mingo@...hat.com, linux-kernel@...r.kernel.org,
	iommu@...ts.linux-foundation.org, bhavna.sarathy@....com,
	Sebastian.Biemueller@....com, robert.richter@....com,
	joro@...tes.org
Subject: Re: [PATCH 00/34] AMD IOMMU driver

Joerg Roedel <joerg.roedel@....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?

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

Eric
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