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KVM: PIC: Only commit irq routing when necessary
The current logic updates KVM's view of our interrupt map every time we change it. While this is nice and bullet proof, it slows things down badly for me. QEMU spends about 3 seconds on every start telling KVM what news it has on its routing maps. Instead, let's just synchronize the whole irq routing map as a whole when we're done constructing it. For things that change during runtime, we can still update the routing table on demand. Signed-off-by: Alexander Graf <agraf@suse.de>
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@@ -40,6 +40,7 @@ void kvm_pc_setup_irq_routing(bool pci_enabled) | |
} | ||
} | ||
} | ||
kvm_irqchip_commit_routes(s); | ||
} | ||
} | ||
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