D60654.1794007468.diff
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	diff --git a/sys/arm64/acpica/acpi_iort.c b/sys/arm64/acpica/acpi_iort.c
	--- a/sys/arm64/acpica/acpi_iort.c
	+++ b/sys/arm64/acpica/acpi_iort.c
	@@ -139,11 +139,24 @@
	* If all the control interrupts are GISCV based the ID
	* mapping field is ignored.
	*/
	- if (node->data.smmu_v3.EventGsiv != 0 &&
	- node->data.smmu_v3.PriGsiv != 0 &&
	- node->data.smmu_v3.GerrGsiv != 0 &&
	- node->data.smmu_v3.SyncGsiv != 0)
	+ if (node->revision < 5) {
	+ /*
	+ * Before version 5 (DEN0049E.e) the Device ID is
	+ * ignored if all control interrupts are GSIV based.
	+ */
	+ if (node->data.smmu_v3.EventGsiv != 0 &&
	+ node->data.smmu_v3.PriGsiv != 0 &&
	+ node->data.smmu_v3.GerrGsiv != 0 &&
	+ node->data.smmu_v3.SyncGsiv != 0)
	+ return (-1);
	+ } else if ((node->data.smmu_v3.Flags &
	+ ACPI_IORT_SMMU_V3_DEVICEID_VALID) == 0) {
	+ /*
	+ * From revision 5 check if the DeviceID valid flag
	+ * is set.
	+ */
	return (-1);
	+ }

	if (node->data.smmu_v3.IdMappingIndex >= node->nentries)
	return (-1);