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Commit 1c8ee733 authored by Dipankar Sarma's avatar Dipankar Sarma Committed by Benjamin Herrenschmidt
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powerpc/numa: NUMA topology support for PowerNV 



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: default avatarDipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent c40dd2f7

arch/powerpc/mm/numa.c

+17 −7
Original line number Original line Diff line number Diff line
@@ -315,6 +315,9 @@ static int __init find_min_common_depth(void) 
	struct device_node *root;

	struct device_node *root;

	const char *vec5;

	const char *vec5;





	if (firmware_has_feature(FW_FEATURE_OPAL))

		root = of_find_node_by_path("/ibm,opal");

	else

		root = of_find_node_by_path("/rtas");

		root = of_find_node_by_path("/rtas");

	if (!root)

	if (!root)

		root = of_find_node_by_path("/");

		root = of_find_node_by_path("/");
@@ -344,14 +347,21 @@ static int __init find_min_common_depth(void) 




#define VEC5_AFFINITY_BYTE	5

#define VEC5_AFFINITY_BYTE	5

#define VEC5_AFFINITY		0x80

#define VEC5_AFFINITY		0x80



	if (firmware_has_feature(FW_FEATURE_OPAL))

		form1_affinity = 1;

	else {

		chosen = of_find_node_by_path("/chosen");

		chosen = of_find_node_by_path("/chosen");

		if (chosen) {

		if (chosen) {

		vec5 = of_get_property(chosen, "ibm,architecture-vec-5", NULL);

			vec5 = of_get_property(chosen,

		if (vec5 && (vec5[VEC5_AFFINITY_BYTE] & VEC5_AFFINITY)) {

					       "ibm,architecture-vec-5", NULL);

			if (vec5 && (vec5[VEC5_AFFINITY_BYTE] &

							VEC5_AFFINITY)) {

				dbg("Using form 1 affinity\n");

				dbg("Using form 1 affinity\n");

				form1_affinity = 1;

				form1_affinity = 1;

			}

			}

		}

		}

	}





	if (form1_affinity) {

	if (form1_affinity) {

		depth = distance_ref_points[0];

		depth = distance_ref_points[0];