From: Avi Kivity <avi@redhat.com>
Date: Tue, 21 Sep 2010 17:59:43 +0000 (+0200)
Subject: KVM: Fix reboot on Intel hosts
X-Git-Tag: v2.6.36-rc6~49^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ca242ac9960dc61530e25a2c190e4e13fd5f1ecb;p=pandora-kernel.git

KVM: Fix reboot on Intel hosts

When we reboot, we disable vmx extensions or otherwise INIT gets blocked.
If a task on another cpu hits a vmx instruction, it will fault if vmx is
disabled.  We trap that to avoid a nasty oops and spin until the reboot
completes.

Problem is, we sleep with interrupts disabled.  This blocks smp_send_stop()
from running, and the reboot process halts.

Fix by enabling interrupts before spinning.

KVM-Stable-Tag.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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