diff --git a/release/tools/ec2.conf b/release/tools/ec2.conf
--- a/release/tools/ec2.conf
+++ b/release/tools/ec2.conf
@@ -70,6 +70,11 @@
 	# nodes, but apply the workaround just in case.
 	echo 'hw.broken_txfifo="1"' >> ${DESTDIR}/boot/loader.conf
 
+	# Graviton 1 through Graviton 4 have a bug in their ACPI where they
+	# mark the PL061's pins as needing to be configured in PullUp mode
+	# (in fact the PL061 has no pullup/pulldown resistors).
+	echo 'debug.acpi.quirks="8"' >> ${DESTDIR}/boot/loader.conf
+
 	# Load the kernel module for the Amazon "Elastic Network Adapter"
 	echo 'if_ena_load="YES"' >> ${DESTDIR}/boot/loader.conf
 
diff --git a/sys/dev/acpica/acpivar.h b/sys/dev/acpica/acpivar.h
--- a/sys/dev/acpica/acpivar.h
+++ b/sys/dev/acpica/acpivar.h
@@ -227,12 +227,15 @@
  * ACPI_Q_MADT_IRQ0: Specifies that ISA IRQ 0 is wired up to pin 0 of the
  *	first APIC and that the MADT should force that by ignoring the PC-AT
  *	compatible flag and ignoring overrides that redirect IRQ 0 to pin 2.
+ * ACPI_Q_AEI_NOPULL: Specifies that _AEI objects incorrectly designate pins
+ *	as "PullUp" and they should be treated as "NoPull" instead.
  */
 extern int	acpi_quirks;
 #define ACPI_Q_OK		0
 #define ACPI_Q_BROKEN		(1 << 0)
 #define ACPI_Q_TIMER		(1 << 1)
 #define ACPI_Q_MADT_IRQ0	(1 << 2)
+#define ACPI_Q_AEI_NOPULL	(1 << 3)
 
 #if defined(__amd64__) || defined(__i386__)
 /*