From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jan Beulich" <JBeulich@novell.com>
Subject: iommu=0 leading to panic when system defaults to using
	x2apic
Date: Fri, 10 Dec 2010 09:12:21 +0000
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Why wouldn't iommu=3D0 imply not using the x2apic, if use of the
iommu indeed is a prerequisite (which by itself seems questionable
as long as APIC IDs aren't wider than 8 bits)?

Looking further at enable_bsp_x2apic(), I also wonder whether
the pre-enabled case, when specifying iommu=3D0 and x2apic=3D0,
can actually work if iommu=3D0 is a prerequisite (intremap_enabled()
would return 1 in that case afaics, so the early check doesn't help).

Thanks, Jan