Re: [PATCH 1/2] IOMMU Identity Mapping Support:iommu_identity_mapping definition

From: Muli Ben-Yehuda
Date: Thu Jun 18 2009 - 14:11:51 EST

On Thu, Jun 18, 2009 at 11:05:14AM -0700, Fenghua Yu wrote:

> IOMMU Identity Mapping Support: iommu_identity_mapping definition
> Identity mapping for IOMMU defines a single domain to 1:1 map all
> pci devices to all usable memory.

Why use VT-d at all in this case? Do you have a use-case in mind?


> This method may lose some of DMA remapping benefits like isolation.

I think you meant s/may/will/.

Muli Ben-Yehuda | muli@xxxxxxxxxx | +972-4-8281080
Manager, Virtualization and Systems Architecture
Master Inventor, IBM Haifa Research Laboratory
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