D31690.diff
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	Index: sys/arm64/xen/xen_arch_intr.c
	===================================================================
	--- sys/arm64/xen/xen_arch_intr.c
	+++ sys/arm64/xen/xen_arch_intr.c
	@@ -40,6 +40,7 @@
	#include <sys/pcpu.h>
	#include <sys/smp.h>
	#include <sys/syslog.h>
	+#include <sys/intr.h>

	#include <xen/xen-os.h>
	#include <xen/arch-intr.h>
	@@ -112,6 +113,20 @@
	isrc = NULL;
	}

	+#ifdef SMP
	+ if (type == EVTCHN_TYPE_PORT) {
	+ static u_int current = 1;
	+
	+ /*
	+ * By default all interrupts are assigned to vCPU#0
	+ * unless specified otherwise, so shuffle them to balance
	+ * the interrupt load.
	+ */
	+ current = intr_irq_next_cpu(current, &all_cpus);
	+ isrc->xi_cpu = current;
	+ }
	+#endif
	+
	return (isrc);
	}