From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Date: Tue, 26 Oct 2010 16:28:33 +0000 (+0100)
Subject: xen: initialize cpu masks for pv guests in xen_smp_init
X-Git-Tag: v2.6.37-rc1~48^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ea5b8f73933e34d2b47a65284c46d26d49e7edb9;p=pandora-kernel.git

xen: initialize cpu masks for pv guests in xen_smp_init

Pv guests don't have ACPI and need the cpu masks to be set
correctly as early as possible so we call xen_fill_possible_map from
xen_smp_init.
On the other hand the initial domain supports ACPI so in this case we skip
xen_fill_possible_map and rely on it. However Xen might limit the number
of cpus usable by the domain, so we filter those masks during smp
initialization using the VCPUOP_is_up hypercall.
It is important that the filtering is done before
xen_setup_vcpu_info_placement.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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