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

To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
Subject: Re: [Xen-devel] [Q] Is qemu used when we use VTd?
From: Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>
Date: Thu, 11 Sep 2008 20:06:30 +0900
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Thank you.

And mmio is traped by hypervisor,
then hypervisor do mmio instead of HVM guest, Right?

Best Regards,

Akio Takebe

Tian, Kevin wrote:
>> From: Akio Takebe
>> Sent: 2008年9月11日 18:46
>> Hi,
>> If we assign a device to HVM guest,
>> HVM guest can do directry DMA transfer.
>> But how about accessing pci configuration register
>> of the pass through device? Do we still access
>> pci configuration register through qemu?
> Yes, even when we say that given on PCI config field
> can be directly accessed by HVM guest, it's still trapped
> to Qemu for route.
> Thanks,
> Kevin

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