tree 8846d2a5052aec44141e811c0a76fdb39c2e77ca
parent d4acf7e7abe45457e751525a2a4d5b693dfdd597
author Marcelo Tosatti <mtosatti@redhat.com> 1212781056 -0300
committer Avi Kivity <avi@qumranet.com> 1214299019 +0300

KVM: close timer injection race window in __vcpu_run

If a timer fires after kvm_inject_pending_timer_irqs() but before
local_irq_disable() the code will enter guest mode and only inject such
timer interrupt the next time an unrelated event causes an exit.

It would be simpler if the timer->pending irq conversion could be done
with IRQ's disabled, so that the above problem cannot happen.

For now introduce a new vcpu requests bit to cancel guest entry.

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