kvm_request_irq_source_id  660 arch/x86/kvm/i8254.c 	pit->irq_source_id = kvm_request_irq_source_id(kvm);
kvm_request_irq_source_id 1000 include/linux/kvm_host.h int kvm_request_irq_source_id(struct kvm *kvm);