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RE: [Xen-devel] [Q] Is qemu used when we use VTd?


  • To: "Akio Takebe" <takebe_akio@xxxxxxxxxxxxxx>
  • From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
  • Date: Fri, 12 Sep 2008 10:37:59 +0800
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 11 Sep 2008 19:38:25 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AckT/paEhiv4a2A4Q1qpPll7JBJKHgAgb9CQ
  • Thread-topic: [Xen-devel] [Q] Is qemu used when we use VTd?

>From: Akio Takebe [mailto:takebe_akio@xxxxxxxxxxxxxx] 
>Sent: 2008年9月11日 19:07
>
>Hi,
>
>Thank you.
>
>And mmio is traped by hypervisor,
>then hypervisor do mmio instead of HVM guest, Right?
>

Which mmio are you actually talking? If you mean MMIO
ranges in PCI BARs of passthrough device, they can be
directly accessed by HVM with p2m entry setup accord-
ingly, if MMIO range falls in 4k page granularity.

Thanks,
Kevin

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