From: Lin Ming <mlin@ss.pku.edu.cn>
Date: Mon, 30 Apr 2012 16:16:27 +0000 (+0800)
Subject: xen/apic: implement io apic read with hypercall
X-Git-Tag: v3.5-rc1~139^2~8^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ab6ec39a191243b9968bb9ac7f26cc7ec30c618b;p=pandora-kernel.git

xen/apic: implement io apic read with hypercall

Implements xen_io_apic_read with hypercall, so it returns proper
IO-APIC information instead of fabricated one.

Fallback to return an emulated IO_APIC values if hypercall fails.

[v2: fallback to return an emulated IO_APIC values if hypercall fails]
Signed-off-by: Lin Ming <mlin@ss.pku.edu.cn>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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