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Re: [Xen-devel] ioperm problem
- To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
- From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
- Date: Thu, 17 Nov 2011 17:37:50 +0000
- Cc: a <pavel@xxxxxxxxxx>, Pavel, xen-devel@xxxxxxxxxxxxxxxxxxx, tom.goetz@xxxxxxxxxxxxxxxxxxx, Ben Guthro <ben.guthro@xxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 17 Nov 2011 17:36:59 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
> > This opens up the legacy VGA ports in the VGA arbiter code.
>
> Was there a userspace program that did this? As in it would
> call ioperm?
Not necessarily there is also a priviledged interface via the console for
historical reasons
For the legacy VGA ports the proper approach is almost certainly to scan
the PCI bus routing data and work out which device they are routed to and
then attach them to that physical device.
That may be a dynamic configuration but you'll see the virtualisation of
the PCI config changes any guest tries to do if so.
Alan
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