From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christophe Saout <christophe@saout.de>
Subject: Re: Xen with dom0 pvops on ultra-recent "git tip"
	kernel on x86_64
Date: Tue, 13 Jan 2009 17:57:26 +0100
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Hello,

> The X server crashes in some I/O port "inb()" command.  Seems like the
> io permissions aren't correctly passed through or something. (iopl or
> ioperm or so)  I'll try to debug a bit more later.

The native Xen kernel has an arch/x86/kernel/ioport-xen.c which calls:

	HYPERVISOR_physdev_op(PHYSDEVOP_set_iobitmap, &set_iobitmap);

Is this a feature mabye still missing from the paravirtualized Xen?

If yes, what would it take?  A new paravirt call?

Thanks,
	Christophe