commit b275bfb2696387be216db5b7372ee9dcf3f05b80
author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Wed Jul 13 15:05:31 2016 +0530
committer Michael Ellerman <mpe@ellerman.id.au> Sun Jul 17 16:42:55 2016 +1000
tree 86e47bb902cc99d0da9273625188cce36989e728
parent 912cc87a654d3d30f5da6220489a97a5beb7d313

powerpc/mm/radix: Add a kernel command line to disable radix

This patch adds the kernel command line disable_radix which disable
the radix MMU mode even if firmware indicates radix support via
ibm,pa-features device tree node.

This helps in testing different MMU mode easily.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

Documentation/kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 738bae4..bba7ef3 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -929,6 +929,9 @@
 	disable=	[IPV6]
 			See Documentation/networking/ipv6.txt.
 
+	disable_radix	[PPC]
+			Disable RADIX MMU mode on POWER9
+
 	disable_cpu_apicid= [X86,APIC,SMP]
 			Format: <int>
 			The number of initial APIC ID for the