D3753.id9705.diff
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	Index: head/sys/arm64/arm64/gic_v3_its.c
	===================================================================
	--- head/sys/arm64/arm64/gic_v3_its.c
	+++ head/sys/arm64/arm64/gic_v3_its.c
	@@ -59,6 +59,8 @@
	#include "gic_v3_reg.h"
	#include "gic_v3_var.h"

	+#define GIC_V3_ITS_QUIRK_THUNDERX_PEM_BUS_OFFSET 144
	+
	#include "pic_if.h"

	/* Device and PIC methods */
	@@ -1475,8 +1477,8 @@
	bsf = PCI_RID(pci_get_bus(pci_dev), pci_get_slot(pci_dev),
	pci_get_function(pci_dev));

	- /* ECAM is on bus=0 */
	- if (bus == 0) {
	+ /* Check if accessing internal PCIe (low bus numbers) */
	+ if (bus < GIC_V3_ITS_QUIRK_THUNDERX_PEM_BUS_OFFSET) {
	return ((pci_get_domain(pci_dev) << PCI_RID_DOMAIN_SHIFT) \|
	bsf);
	/* PEM otherwise */