From mboxrd@z Thu Jan  1 00:00:00 1970
From: Akio Takebe <takebe_akio@jp.fujitsu.com>
Subject: Re: [Q] Is qemu used when we use VTd?
Date: Thu, 11 Sep 2008 20:06:30 +0900
Message-ID: <48C8FBB6.7070305@jp.fujitsu.com>
References: <48C8F6F2.20305@jp.fujitsu.com>
	<D470B4E54465E3469E2ABBC5AFAC390F024D97B1@pdsmsx412.ccr.corp.intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=gb2312
Content-Transfer-Encoding: quoted-printable
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <D470B4E54465E3469E2ABBC5AFAC390F024D97B1@pdsmsx412.ccr.corp.intel.com>
List-Unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

Hi,

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=C4=EA9=D4=C211=C8=D5 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?
>>
>=20
> 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.
>=20
> Thanks,
> Kevin
>=20