diff mbox

NUMA topology support for powernv

Message ID 20111028142532.GF26162@in.ibm.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Dipankar Sarma Oct. 28, 2011, 2:25 p.m. UTC 
This patch adds support for numa topology on powernv platforms running
OPAL formware. It checks for the type of platform at run time and
sets the affinity form correctly so that NUMA topology can be discovered
correctly.

Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com>
---
 arch/powerpc/mm/numa.c |   24 +++++++++++++++++-------
 1 files changed, 17 insertions(+), 7 deletions(-)
diff mbox

Patch

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 0bfb90c..58f292f 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -315,7 +315,10 @@  static int __init find_min_common_depth(void)
 	struct device_node *root;
 	const char *vec5;
 
-	root = of_find_node_by_path("/rtas");
+	if (firmware_has_feature(FW_FEATURE_OPAL))
+		root = of_find_node_by_path("/ibm,opal");
+	else
+		root = of_find_node_by_path("/rtas");
 	if (!root)
 		root = of_find_node_by_path("/");
 
@@ -344,12 +347,19 @@  static int __init find_min_common_depth(void)
 
 #define VEC5_AFFINITY_BYTE	5
 #define VEC5_AFFINITY		0x80
-	chosen = of_find_node_by_path("/chosen");
-	if (chosen) {
-		vec5 = of_get_property(chosen, "ibm,architecture-vec-5", NULL);
-		if (vec5 && (vec5[VEC5_AFFINITY_BYTE] & VEC5_AFFINITY)) {
-			dbg("Using form 1 affinity\n");
-			form1_affinity = 1;
+
+	if (firmware_has_feature(FW_FEATURE_OPAL))
+		form1_affinity = 1;
+	else {
+		chosen = of_find_node_by_path("/chosen");
+		if (chosen) {
+			vec5 = of_get_property(chosen, 
+					       "ibm,architecture-vec-5", NULL);
+			if (vec5 && (vec5[VEC5_AFFINITY_BYTE] & 
+							VEC5_AFFINITY)) {
+				dbg("Using form 1 affinity\n");
+				form1_affinity = 1;
+			}
 		}
 	}