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Re: [Xen-devel] one question on the PCI ioport base address for hvm domain in hvmloader.c


  • To: "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Mon, 07 Jan 2008 12:59:29 +0000
  • Delivery-date: Mon, 07 Jan 2008 05:00:28 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AchRIyN5yzpWwbISTzG5mnNZ0UT+SwACf/2N
  • Thread-topic: [Xen-devel] one question on the PCI ioport base address for hvm domain in hvmloader.c

Why not keep the level of indirection? After all, the guest OS should be
allowed to remap any BAR and we should support that.

 -- Keir

On 7/1/08 11:47, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote:

> I'm considering to make guest IO port address same as physical one for
> passthrough hvm domain. However,  in hvmloader.c's pci_setup(), the
> io_base is hardcoded as 0xc000, are there any special reason for this
> value? (I checked and seems it comes from original qemu's code)
> 
> Can anyone give me some hints on it?
> 
> Thanks
> -- Yunhong Jiang
> 
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> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel



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