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[Xen-devel] RE: pciback+front needed for hvm ?

To: "'Kay, Allen M'" <allen.m.kay@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] RE: pciback+front needed for hvm ?
From: Tim Moore <timothy.moore@xxxxxxxxxxx>
Date: Tue, 14 Apr 2009 00:29:06 +0100
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Thread-topic: pciback+front needed for hvm ?

Please could you point me to the patch ?


Thanks !


From: Kay, Allen M [mailto:allen.m.kay@xxxxxxxxx]
Sent: 13 April 2009 22:00
To: Tim Moore; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: RE: pciback+front needed for hvm ?


HVM guest uses PCI bus provided by QEMU.  The functionality in QEMU is complete for PCI passthrough support most devices.   Additional patch is needed for graphics device passthrough.


From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Tim Moore
Sent: Monday, April 13, 2009 6:21 AM
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] pciback+front needed for hvm ?


Dom0 with pciback + DomU with pcifront. pcifront grabs device during DomU boot and vendor driver then loads against passthrough device and works great!


In the same scenario with HVM DomU, is pcifront needed or does qemu provide the PCI Bus ?


Both Linux and Win32 hvm fail to load the vendor driver against the PCI device. Is this a problem with qemu or is further support needed in hvm domU for PCI passthrough?




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