forked from luck/tmp_suning_uos_patched
KVM: Avoid double interrupt injection with vapic
After an interrupt injection, the PPR changes, and we have to reflect that into the vapic. This causes a KVM_REQ_EVENT to be set, which causes the whole interrupt injection routine to be run again (harmlessly). Optimize by only setting KVM_REQ_EVENT if the ppr was lowered; otherwise there is no chance that a new injection is needed. Signed-off-by: Avi Kivity <avi@redhat.com>
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@ -277,7 +277,8 @@ static void apic_update_ppr(struct kvm_lapic *apic)
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if (old_ppr != ppr) {
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apic_set_reg(apic, APIC_PROCPRI, ppr);
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kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
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if (ppr < old_ppr)
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kvm_make_request(KVM_REQ_EVENT, apic->vcpu);
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}
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}
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