XENFEAT_hvm_pirqs 449 arch/x86/pci/xen.c if (!xen_have_vector_callback || !xen_feature(XENFEAT_hvm_pirqs)) XENFEAT_hvm_pirqs 229 arch/x86/xen/enlighten_hvm.c if (xen_feature(XENFEAT_hvm_pirqs) && xen_have_vector_callback)