Re: [Xen-users] PCI Hotplugging - Could I juggle a video card and other devices between running DomUs?

[Casey DeLorme <cdelorme@xxxxxxxxx>]

I attached devices manually, seems to work fine.  I suppose you could create a sh script in a linux Dom0 to run the commands, but the real trouble comes from being able to execute them from the guest HVM's.

One easy way would be to turn ssh on in Dom0 and putty on windows or ssh via any other to access & run the scripts.  I'm sure there are plenty of alternatives, but I don't see any reason why you wouldn't be able to swap components in live machines.

On Wed, Apr 25, 2012 at 2:58 PM, Andrew Bobulsky <rulerof@xxxxxxxxx> wrote:

Hello List!

As I venture a little further down the Xen rabbit hole, I've gotten
myself wondering: could I script the use of "xm pci-attach" and "xm
pci-detach" such that I can shift all of my difficult-to-virtualize
PCI devices, such as video card[s], USB controllers, audio devices,
and so on, from one running DomU to another?  Give myself a button or
key combination---of which the guest OS is aware, so that it may
initiate the process---to switch my hardware from one VM to another on
the fly, implementing what would behave like a software-based KVM
switch (but without the exponentially rising costs associated with
getting more ports, dual-link DVI/Displayport, and so on... not to
mention requiring multiple machines :D).

Could I potentially effortlessly switch between Windows, Linux, and
perhaps a Hackintosh?  That would be quite the awesome application of
cutting edge tech, I say :)

Curious if anyone has experience with attaching/detaching these types
of devices, and whether or not guest OSes and their drivers, play nice
with this feature.

Thanks,
Andrew Bobulsky

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