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Re: [Xen-devel] Virtualization project idea

To: Dhananjay Goel <dhananjaygoel123@xxxxxxxxx>
Subject: Re: [Xen-devel] Virtualization project idea
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Fri, 27 Aug 2010 10:57:00 +0100
Cc: David Markey <admin@xxxxxxxxxxx>, James Harper <james.harper@xxxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On 27/08/2010 10:48, "Dhananjay Goel" <dhananjaygoel123@xxxxxxxxx> wrote:

>> You don't necessarily share network, disc, or mouse/keyboard at the USB
>> level. For network, as an example, the hardware device belongs to the host
>> which provides NATed or bridged networking to VMs. VMs see a virtual network
>> device rather than the underlying physical device. Similar principle applies
>> to other device classes -- VMs see a virtual device. If you want a VM to see
>> a property of a physical device that cannot be expressed in your virtual
>> device model, you pass that physical device through directly to that one VM.
>> If you want direct passthrough and some semblance of sharing between VMs...
>> that's harder to do.
> I agree its difficult to do. But is it possible to do? Can we make such that
> USB devices are shared across VMs? Any suggestion of how it can be done? 

Well, no, not really. You go work it out and come back with some patches.

 -- Keir

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