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Re: [Qemu-devel] PATCH/RFC: PCI memory mapping
From: |
Brian Wheeler |
Subject: |
Re: [Qemu-devel] PATCH/RFC: PCI memory mapping |
Date: |
Thu, 02 Apr 2009 13:42:30 -0400 |
On Thu, 2009-04-02 at 20:32 +0300, Blue Swirl wrote:
> On 4/2/09, Brian Wheeler <address@hidden> wrote:
> > [first off, if there's an easier way to do this, let me know!]
> >
> > This patch adds an address mapping function to the PCI bus so the host
> > chipset can remap PCI generated addresses to the appropriate physical
> > addresses.
>
> This discussion has come up many, many times, but finally the design
> was settled to the current dma API. It supports resolving guest
> addresses to host pointers, so that part should be extended instead
> of adding new functionality. We want (one day) zero copy DMA even with
> IOMMU.
>
>
Is there documentation somewhere?