On 04/03/2012 02:31 PM, Ian Jackson wrote:
Stefano Stabellini writes ("Re: [Xen-devel] [XEN][RFC PATCH 14/15] xl-parsing: Parse
the new option device_models"):
On Mon, 2 Apr 2012, Ian Jackson wrote:
I don't think this is really a suitable interface. The PCI space in
the guest is controlled by the device models(s) and the user should
surely specify which devices should be provided by which dms, in terms
of devices not in terms of PCI space.
Julien added a name parameter to select the device, maybe we need
something clearer?
Specifying the PCI address is important, because we have to make sure
the PCI addresses of the devices remain the same in a given VM across
multiple boots.
Are the PCI addresses not assigned in a deterministic fashion by code
in qemu-dm, in this case in the qemu-dm which is emulating the pci
bridge ? If not then that needs to be fixed, surely ?
Indeed but each QEMU emulate a subset of the hardware.
So how QEMU can know the available PCI addresses ?
I think that toolstack must allocate the BDF, otherwise we need to have
communication between each qemu-dm.
