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RE: [Xen-users] problem with GPLPV drivers > 0.9 in Win XP HVM

To: "Sebastian Reitenbach" <buzzdee@xxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] problem with GPLPV drivers > 0.9 in Win XP HVM
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Fri, 12 Sep 2008 21:35:00 +1000
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Thread-topic: [Xen-users] problem with GPLPV drivers > 0.9 in Win XP HVM
> 
> But there I observed the following in the hardware list:
> The drive was renamed from "QEMU disk" to "Xen PV VBD SCSI Disk
Drive",
> but the driver still was the Microsoft driver from year 2001, version:
> 5.1.2535.0.
> The other Xen devices, Network card, PCI, Stub and EMU devices, are
using
> the Xen 0.8.9 driver.
> Is that right that for the harddisk, the Microsoft driver is used?
> I was also expecting a Xen driver there.
> 

GPLPV provides a driver for vbd, which is implemented as a windows
scsiport miniport driver. Windows queries every scsi address on the
scsiport driver, and xenvbd tells it that there is a single disk there.
Windows then provides a driver for the disk that it finds.

I hope that makes some sense :)

James

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