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Re: [Qemu-devel] [RFC PATCH] vfio: VFIO Driver core framework

From: Scott Wood
Subject: Re: [Qemu-devel] [RFC PATCH] vfio: VFIO Driver core framework
Date: Fri, 2 Dec 2011 12:27:02 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:6.0.2) Gecko/20110906 Thunderbird/6.0.2

On 12/02/2011 12:11 PM, Bhushan Bharat-R65777 wrote:
> How do we determine whether guest is ready or not? There can be multiple 
> device get ready at different time.

The guest makes a hypercall with a device handle -- at least that's how
we do it in Topaz.

> Further if guest have given the device to it user level process or its guest. 
> Should not there be some mechanism for a guest to enable/disable on per 
> device or group?

Yes, the same mechanism can be used for that -- though in that case
we'll also want the ability for the guest to be able to control another
layer of mapping (which will get quite tricky with PAMU's limitations).
 This isn't really VFIO's concern, though (unless you're talking about
the VFIO implementation in the guest).


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