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Message-ID: <20090618180835.GB6838@il.ibm.com> Date: Thu, 18 Jun 2009 21:08:35 +0300 From: Muli Ben-Yehuda <muli@...ibm.com> To: Fenghua Yu <fenghua.yu@...el.com> Cc: David Woodhouse <dwmw2@...radead.org>, "'Linus Torvalds'" <torvalds@...ux-foundation.org>, "'Stephen Rothwell'" <sfr@...b.auug.org.au>, "'Andrew Morton'" <akpm@...ux-foundation.org>, "'Ingo Molnar'" <mingo@...e.hu>, "'Christopher Wright'" <chrisw@...hat.com>, "'Allen Kay'" <allen.m.kay@...el.com>, "'lkml'" <linux-kernel@...r.kernel.org>, "'iommu'" <iommu@...ts.linux-foundation.org> Subject: Re: [PATCH 1/2] IOMMU Identity Mapping Support: iommu_identity_mapping definition 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? Cheers, Muli > This method may lose some of DMA remapping benefits like isolation. I think you meant s/may/will/. Cheers, Muli -- Muli Ben-Yehuda | muli@...ibm.com | +972-4-8281080 Manager, Virtualization and Systems Architecture Master Inventor, IBM Haifa Research Laboratory -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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