KVM: Fix race in apic->pending_events processing

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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>

...

This commit is contained in:

Gleb Natapov 2013-06-03 11:30:02 +03:00

parent 8acb42070e

commit 299018f44a

1 changed files with 6 additions and 3 deletions

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arch/x86/kvm/lapic.c

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