linux-kernel - Re: [patch 0/8] [Intel IOMMU] Support for Intel Virtualization Technology for Directed I/O

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Date:	Tue, 10 Apr 2007 04:21:57 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Ashok Raj <ashok.raj@...el.com>
CC:	linux-kernel@...r.kernel.org, akpm@...l.org, ak@...e.de,
	gregkh@...e.de, muli@...ibm.com, asit.k.mallick@...el.com,
	suresh.b.siddha@...el.com, anil.s.keshavamurthy@...el.com,
	arjan@...ux.intel.com, shaohua.li@...el.com,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [patch 0/8] [Intel IOMMU] Support for Intel Virtualization Technology
 for Directed I/O

Ashok Raj wrote:
> 1. Support for ACPI framework to parse and work with DMA Remapping Tables.
> 2. Add support for PCI infrastructure to search parent relationships.
> 3. Hardware support for providing DMA remapping support for Intel Chipsets.
> 4. Supporting Zero Length Reads on DMAR's not able to support ZLR.
> 5. Graphics driver workarounds to provide unity map since they dont use dma api.
> 6. Updates to Documentation area for startup options and some basics.
> 7. Workaround to provide unity map for ISA bridge device to enable floppy disk.
> 8. Ability to preserve some mappings for devices not able to address entire 
>    range.

I really think it would be best to avoid ACPI for something as critical 
as DMA remapping!

	Jeff


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