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Re: [Xen-devel] [pvops-dom0] [patch] Hook Linux's PCI probe and remove c

To: "Kay, Allen M" <allen.m.kay@xxxxxxxxx>
Subject: Re: [Xen-devel] [pvops-dom0] [patch] Hook Linux's PCI probe and remove callbacks
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Mon, 20 Jul 2009 10:00:57 -0700
Cc: "'xen-devel@xxxxxxxxxxxxxxxxxxx'" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Han, Weidong" <weidong.han@xxxxxxxxx>, 'Keir Fraser' <Keir.Fraser@xxxxxxxxxxxxx>, Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>
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On 07/17/09 16:42, Kay, Allen M wrote:
> These hooks for two purposes:
> 1) Enabling of a SR-IOV virtual function.  The hypercall will tell xen to 
> setup VT-d context entries for the BDF corresponding to the new virtual 
> function.  This is required for SR-IOV to work.
> 2) PCI hot-plug support when devices are hot added/removed.  Vt-d context 
> entries and data structures in Xen needs to be modified accordingly.
> These hooks needs to be enabled before either of these functions are 
> performed - I assume after dom0 boots.
> Can you suggest a better way to do this?

The best person to ask is probably Jesse Barnes (cc:d).

In general the way to approach these things is to either find something
in the kernel which does something analogous and use the same
interfaces, possibly extending them a bit if necessary.


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