KVM guests unique ID Post: 302910738

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Special Forums UNIX and Linux Applications Virtualization and Cloud Computing KVM guests unique ID Post 302910738 by shivanik on Sunday 27th of July 2014 11:01:57 PM

07-28-2014

Registered User

KVM guests unique ID

Hi,
I wanted to know if there was a way to get a unique UUID for KVM guest from the guest OS which isn't easily modifiable. I have a software that I would like to run inside a KVM guest and want to do some license protection on it using a unique UUID. Does KVM allow multiple VMs on the same machine with same UUID. I mean if someone edits the configuration file of the VM manually from the host, would it still bring up the VM if the uuid was duplicated ? Also how can I get the uuid of a guest VM from the guest ?

Also if someone could throw some light on guest host communication channel. Is there an equivalent of Xenstore or guest property store in KVM ? Some mechanism to share small messages between the guest and the host.

Thanks
Shivani

shivanik

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LEARN ABOUT NETBSD

xpci

XPCI(4) 						 BSD/xen Kernel Interfaces Manual						   XPCI(4)

NAME

     xpci -- Xen frontend paravirtualized PCI pass-through driver

SYNOPSIS

     xpci* at xenbus?
     pci* at xpci?

DESCRIPTION

     The xpci driver is the frontend part of the PCI pass-through functionality that can be used by Xen guest domains to communicate with PCI
     devices.

     From a guest point of view, xpci is similar to a pci(4) bus, except that the guest talks with the PCI backend driver instead of the real
     physical device directly.

     When the host domain is NetBSD, the xpci driver is backed by a pciback(4) driver within the dom0.

SEE ALSO

     pci(4), pciback(4), xenbus(4)

HISTORY

     The xpci driver first appeared in NetBSD 5.1.

AUTHORS

     The xpci driver was written by Manuel Bouyer <bouyer@NetBSD.org>.

SECURITY CONSIDERATIONS

     As PCI passthrough offers the possibility for guest domains to send arbitrary PCI commands to a physical device, this has direct impact on
     the overall stability and security of the system.	For example, in case of erroneous or malicious commands, the device could overwrite physi-
     cal memory portions, via DMA.

BSD
								  January 8, 2011							       BSD