diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index a4c3538857e9..7b15abf7db21 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5272,6 +5272,15 @@
 			Format:
 			<irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]]
 
+	xive=		[PPC]
+			By default on POWER9 and above, the kernel will
+			natively use the XIVE interrupt controller. This option
+			allows the fallback firmware mode to be used:
+
+			off       Fallback to firmware control of XIVE interrupt
+				  controller on both pseries and powernv
+				  platforms. Only useful on POWER9 and above.
+
 	xhci-hcd.quirks		[USB,KNL]
 			A hex value specifying bitmask with supplemental xhci
 			host controller quirks. Meaning of each bit can be