[libvirt] [PATCH 2/3] New 'permissive' attribute for hostdev

Daniel P. Berrange berrange at redhat.com
Mon Dec 21 19:09:08 UTC 2009

On Mon, Dec 21, 2009 at 02:27:18PM +0100, Jiri Denemark wrote:
> When it is set to 'yes', some check whether a device is safe to be
> assigned to a guest will be weakened.

I think this is a rather ill-defined concept to be adding the guest XML,
since there are many checks done for assignment, and this is only impacting
one of them. Whether to allow a device beind a non-ACS enable switch to be
used in a VM has implications beyond just the one VM it is assigned to. Thus
is strikes me that the decision as to whether to allow use of devices behind
non-ACS switches should be a host level attribute. eg a config item in the
/etc/qemu/qemu.conf file

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