On Tue, Dec 01, 2009 at 03:36:36PM +0100, Chris Lalancette wrote:
> Call it kvm_apic_in_virtual_wire_mode, which is more
> correct. Also change it to not only operate properly
> on the boot CPU, but on any CPU.
>
Currently it is assumed that if kvm_cpu_has_interrupt() returns true
kvm_cpu_get_interrupt() will return valid interrupt. After this change
it may not be the case any more. Suppose there are more then one vcpus
in a virtual wire mode. Pic receives interrupt and multiple cpus try
to inject it simultaneously. They all check that interrupt is pending
by calling kvm_cpu_has_interrupt() and then try to get the vector by
calling kvm_cpu_get_interrupt(). Only one vcpu will get correct value,
others will get spurious interrupt.
--
Gleb.
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