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[Xen-devel] Is there a way to differentiate PV-on-HVM devices from qemu-dm devices?


  • To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "He, Qing" <qing.he@xxxxxxxxx>
  • Date: Mon, 30 Oct 2006 16:48:09 +0800
  • Delivery-date: Mon, 30 Oct 2006 00:48:50 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Acb8AB+kxo6wcPepQkqAPLvIQjnoZw==
  • Thread-topic: Is there a way to differentiate PV-on-HVM devices from qemu-dm devices?

Hi folk,
I'm recently doing some work on VNIF driver, however, when I enabled
both qemu-dm devices and pv devices, the pv driver complains. It seems
two kinds of devices have very similar entries in xenstore, which misled
the driver.

I remembered in the past, there is a `type:ioemu' entry in xenstore to
represent dm devices, but it was removed. There used to be a `handle'
entry specifically for netfront, but was also removed because domU
netfront didn't use it any more.

I think VBD also has this problem. I think we need a unified way in
xenstore frontend side to differentiate these two kinds of devices.

Thanks,
Qing

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