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RE: [Xen-devel] qemu on Vt-x

  • To: "Ian Brown" <ianbrn@xxxxxxxxx>, "Xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "You, Yongkang" <yongkang.you@xxxxxxxxx>
  • Date: Mon, 27 Feb 2006 11:37:21 +0800
  • Delivery-date: Mon, 27 Feb 2006 03:37:50 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcY6501TZhOarwIzT+WLB7jtcH5PGQAZrOkA
  • Thread-topic: [Xen-devel] qemu on Vt-x

Best Regards,
Yongkang (Kangkang) 永康

>-----Original Message-----
>From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
>[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Ian Brown
>Sent: 2006年2月26日 23:11
>To: Xen-devel
>Subject: [Xen-devel] qemu on Vt-x
>As I understand, when starting a domU on a Vt-x domain
>we start the qemu-dm.

In VT supported machine, when create HVM (VMX) domain, it will start qemu. If 
only create xenU, it is same to non VT machine. (XenU config is 
/etc/xen/xmeample1 etc.)

>But as far as I remember for qemu on linux, running qemu should get
>a parameter which is a file image name.
>( for example,  the qemu User Documentation we have
>"qemu linux.img").
>Is this parameter exsists anywhere ? from where is it taken ? or is
>it omitted ?

It is also need parameters for Qemu to create HVM domain. Xm tool help to parse 
the parameters of HVM configuration file and start Qemu with them. E.g. sdl, 
vnc, disk, nic, etc. You can change device_model config to:
device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm.debug'

Then you can find the Qemu parameters in /tmp/args, after run xm create 

>Is it the image from the "disk" parameter, (like in the
>dist/install/etc/xen/xmexample.hvm:) ?
>disk = [ 'file:/var/images/min-el3-i386.img,ioemu:hda,w' ]

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