From: Gleb Natapov <gleb@redhat.com>
Date: Mon, 3 Jun 2013 08:30:02 +0000 (+0300)
Subject: KVM: Fix race in apic->pending_events processing
X-Git-Tag: v3.10-rc5~28^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=299018f44ac553dce3caf84df1d14c4764faa279;p=pandora-kernel.git

KVM: Fix race in apic->pending_events processing

apic->pending_events processing has a race that may cause INIT and
SIPI
processing to be reordered:

vpu0:                            vcpu1:
set INIT
                               test_and_clear_bit(KVM_APIC_INIT)
                                  process INIT
set INIT
set SIPI
                               test_and_clear_bit(KVM_APIC_SIPI)
                                  process SIPI

At the end INIT is left pending in pending_events. The following patch
fixes this by latching pending event before processing them.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
---

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