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* [PATCH v3 0/8] Add support for FORM2 associativity
@ 2021-06-17  7:34 Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 1/8] powerpc/pseries: rename min_common_depth to primary_domain_index Aneesh Kumar K.V
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: Aneesh Kumar K.V @ 2021-06-17  7:34 UTC (permalink / raw)
  To: linuxppc-dev, mpe
  Cc: Nathan Lynch, David Gibson, Daniel Henrique Barboza, nvdimm,
	dan.j.williams, Aneesh Kumar K.V

Form2 associativity adds a much more flexible NUMA topology layout
than what is provided by Form1. This also allows PAPR SCM device
to use better associativity when using the device as DAX KMEM
device. More details can be found in patch 7.

$ ndctl list -N -v
[
  {
    "dev":"namespace0.0",
    "mode":"devdax",
    "map":"dev",
    "size":1071644672,
    "uuid":"37dea198-ddb5-4e42-915a-99a915e24188",
    "raw_uuid":"148deeaa-4a2f-41d1-8d74-fd9a942d26ba",
    "daxregion":{
      "id":0,
      "size":1071644672,
      "devices":[
        {
          "chardev":"dax0.0",
          "size":1071644672,
          "target_node":4,
          "mode":"devdax"
        }
      ]
    },
    "align":2097152,
    "numa_node":1
  }
]

$ numactl -H
...
node distances:
node   0   1   2   3 
  0:  10  11  222  33 
  1:  44  10  55  66 
  2:  77  88  10  99 
  3:  101  121  132  10 
$

After DAX KMEM
# numactl -H
available: 5 nodes (0-4)
...
node distances:
node   0   1   2   3   4 
  0:  10  11  22  33  255 
  1:  44  10  55  66  255 
  2:  77  88  10  99  255 
  3:  101  121  132  10  255 
  4:  255  255  255  255  10 
# 

The above output is with a Qemu command line

-numa node,nodeid=4 \
-numa dist,src=0,dst=1,val=11 -numa dist,src=0,dst=2,val=22 -numa dist,src=0,dst=3,val=33 -numa dist,src=0,dst=4,val=255 \
-numa dist,src=1,dst=0,val=44 -numa dist,src=1,dst=2,val=55 -numa dist,src=1,dst=3,val=66 -numa dist,src=1,dst=4,val=255 \
-numa dist,src=2,dst=0,val=77 -numa dist,src=2,dst=1,val=88 -numa dist,src=2,dst=3,val=99 -numa dist,src=2,dst=4,val=255 \
-numa dist,src=3,dst=0,val=101 -numa dist,src=3,dst=1,val=121 -numa dist,src=3,dst=2,val=132 -numa dist,src=3,dst=4,val=255 \
-numa dist,src=4,dst=0,val=255 -numa dist,src=4,dst=1,val=255 -numa dist,src=4,dst=2,val=255 -numa dist,src=4,dst=3,val=255 \
-object memory-backend-file,id=memnvdimm1,prealloc=yes,mem-path=$PMEM_DISK,share=yes,size=${PMEM_SIZE}  \
-device nvdimm,label-size=128K,memdev=memnvdimm1,id=nvdimm1,slot=4,uuid=72511b67-0b3b-42fd-8d1d-5be3cae8bcaa,node=4,device-node=1

Qemu changes can be found at https://lore.kernel.org/qemu-devel/20210616011944.2996399-1-danielhb413@gmail.com/

Changes from v2:
* Add nvdimm list to Cc:
* update PATCH 8 commit message.

Changes from v1:
* Update FORM2 documentation.
* rename max_domain_index to max_associativity_domain_index

Aneesh Kumar K.V (8):
  powerpc/pseries: rename min_common_depth to primary_domain_index
  powerpc/pseries: rename distance_ref_points_depth to
    max_associativity_domain_index
  powerpc/pseries: Rename TYPE1_AFFINITY to FORM1_AFFINITY
  powerpc/pseries: Consolidate DLPAR NUMA distance update
  powerpc/pseries: Consolidate NUMA distance update during boot
  powerpc/pseries: Add a helper for form1 cpu distance
  powerpc/pseries: Add support for FORM2 associativity
  powerpc/papr_scm: Use FORM2 associativity details

 Documentation/powerpc/associativity.rst       | 177 +++++++
 arch/powerpc/include/asm/firmware.h           |   7 +-
 arch/powerpc/include/asm/prom.h               |   3 +-
 arch/powerpc/kernel/prom_init.c               |   3 +-
 arch/powerpc/mm/numa.c                        | 436 ++++++++++++++----
 arch/powerpc/platforms/pseries/firmware.c     |   3 +-
 arch/powerpc/platforms/pseries/hotplug-cpu.c  |   2 +
 .../platforms/pseries/hotplug-memory.c        |   2 +
 arch/powerpc/platforms/pseries/papr_scm.c     |  26 +-
 arch/powerpc/platforms/pseries/pseries.h      |   2 +
 10 files changed, 560 insertions(+), 101 deletions(-)
 create mode 100644 Documentation/powerpc/associativity.rst

-- 
2.31.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v3 1/8] powerpc/pseries: rename min_common_depth to primary_domain_index
  2021-06-17  7:34 [PATCH v3 0/8] Add support for FORM2 associativity Aneesh Kumar K.V
@ 2021-06-17  7:34 ` Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 2/8] powerpc/pseries: rename distance_ref_points_depth to max_associativity_domain_index Aneesh Kumar K.V
                   ` (6 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: Aneesh Kumar K.V @ 2021-06-17  7:34 UTC (permalink / raw)
  To: linuxppc-dev, mpe
  Cc: Nathan Lynch, David Gibson, Daniel Henrique Barboza, nvdimm,
	dan.j.williams, Aneesh Kumar K.V

No functional change in this patch.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 arch/powerpc/mm/numa.c | 38 +++++++++++++++++++-------------------
 1 file changed, 19 insertions(+), 19 deletions(-)

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index f2bf98bdcea2..8365b298ec48 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -51,7 +51,7 @@ EXPORT_SYMBOL(numa_cpu_lookup_table);
 EXPORT_SYMBOL(node_to_cpumask_map);
 EXPORT_SYMBOL(node_data);
 
-static int min_common_depth;
+static int primary_domain_index;
 static int n_mem_addr_cells, n_mem_size_cells;
 static int form1_affinity;
 
@@ -232,8 +232,8 @@ static int associativity_to_nid(const __be32 *associativity)
 	if (!numa_enabled)
 		goto out;
 
-	if (of_read_number(associativity, 1) >= min_common_depth)
-		nid = of_read_number(&associativity[min_common_depth], 1);
+	if (of_read_number(associativity, 1) >= primary_domain_index)
+		nid = of_read_number(&associativity[primary_domain_index], 1);
 
 	/* POWER4 LPAR uses 0xffff as invalid node */
 	if (nid == 0xffff || nid >= nr_node_ids)
@@ -284,9 +284,9 @@ int of_node_to_nid(struct device_node *device)
 }
 EXPORT_SYMBOL(of_node_to_nid);
 
-static int __init find_min_common_depth(void)
+static int __init find_primary_domain_index(void)
 {
-	int depth;
+	int index;
 	struct device_node *root;
 
 	if (firmware_has_feature(FW_FEATURE_OPAL))
@@ -326,7 +326,7 @@ static int __init find_min_common_depth(void)
 	}
 
 	if (form1_affinity) {
-		depth = of_read_number(distance_ref_points, 1);
+		index = of_read_number(distance_ref_points, 1);
 	} else {
 		if (distance_ref_points_depth < 2) {
 			printk(KERN_WARNING "NUMA: "
@@ -334,7 +334,7 @@ static int __init find_min_common_depth(void)
 			goto err;
 		}
 
-		depth = of_read_number(&distance_ref_points[1], 1);
+		index = of_read_number(&distance_ref_points[1], 1);
 	}
 
 	/*
@@ -348,7 +348,7 @@ static int __init find_min_common_depth(void)
 	}
 
 	of_node_put(root);
-	return depth;
+	return index;
 
 err:
 	of_node_put(root);
@@ -437,16 +437,16 @@ int of_drconf_to_nid_single(struct drmem_lmb *lmb)
 	int nid = default_nid;
 	int rc, index;
 
-	if ((min_common_depth < 0) || !numa_enabled)
+	if ((primary_domain_index < 0) || !numa_enabled)
 		return default_nid;
 
 	rc = of_get_assoc_arrays(&aa);
 	if (rc)
 		return default_nid;
 
-	if (min_common_depth <= aa.array_sz &&
+	if (primary_domain_index <= aa.array_sz &&
 	    !(lmb->flags & DRCONF_MEM_AI_INVALID) && lmb->aa_index < aa.n_arrays) {
-		index = lmb->aa_index * aa.array_sz + min_common_depth - 1;
+		index = lmb->aa_index * aa.array_sz + primary_domain_index - 1;
 		nid = of_read_number(&aa.arrays[index], 1);
 
 		if (nid == 0xffff || nid >= nr_node_ids)
@@ -708,18 +708,18 @@ static int __init parse_numa_properties(void)
 		return -1;
 	}
 
-	min_common_depth = find_min_common_depth();
+	primary_domain_index = find_primary_domain_index();
 
-	if (min_common_depth < 0) {
+	if (primary_domain_index < 0) {
 		/*
-		 * if we fail to parse min_common_depth from device tree
+		 * if we fail to parse primary_domain_index from device tree
 		 * mark the numa disabled, boot with numa disabled.
 		 */
 		numa_enabled = false;
-		return min_common_depth;
+		return primary_domain_index;
 	}
 
-	dbg("NUMA associativity depth for CPU/Memory: %d\n", min_common_depth);
+	dbg("NUMA associativity depth for CPU/Memory: %d\n", primary_domain_index);
 
 	/*
 	 * Even though we connect cpus to numa domains later in SMP
@@ -919,14 +919,14 @@ static void __init find_possible_nodes(void)
 			goto out;
 	}
 
-	max_nodes = of_read_number(&domains[min_common_depth], 1);
+	max_nodes = of_read_number(&domains[primary_domain_index], 1);
 	for (i = 0; i < max_nodes; i++) {
 		if (!node_possible(i))
 			node_set(i, node_possible_map);
 	}
 
 	prop_length /= sizeof(int);
-	if (prop_length > min_common_depth + 2)
+	if (prop_length > primary_domain_index + 2)
 		coregroup_enabled = 1;
 
 out:
@@ -1259,7 +1259,7 @@ int cpu_to_coregroup_id(int cpu)
 		goto out;
 
 	index = of_read_number(associativity, 1);
-	if (index > min_common_depth + 1)
+	if (index > primary_domain_index + 1)
 		return of_read_number(&associativity[index - 1], 1);
 
 out:
-- 
2.31.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v3 2/8] powerpc/pseries: rename distance_ref_points_depth to max_associativity_domain_index
  2021-06-17  7:34 [PATCH v3 0/8] Add support for FORM2 associativity Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 1/8] powerpc/pseries: rename min_common_depth to primary_domain_index Aneesh Kumar K.V
@ 2021-06-17  7:34 ` Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 3/8] powerpc/pseries: Rename TYPE1_AFFINITY to FORM1_AFFINITY Aneesh Kumar K.V
                   ` (5 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: Aneesh Kumar K.V @ 2021-06-17  7:34 UTC (permalink / raw)
  To: linuxppc-dev, mpe
  Cc: Nathan Lynch, David Gibson, Daniel Henrique Barboza, nvdimm,
	dan.j.williams, Aneesh Kumar K.V

No functional change in this patch

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 arch/powerpc/mm/numa.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 8365b298ec48..132813dd1a6c 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -56,7 +56,7 @@ static int n_mem_addr_cells, n_mem_size_cells;
 static int form1_affinity;
 
 #define MAX_DISTANCE_REF_POINTS 4
-static int distance_ref_points_depth;
+static int max_associativity_domain_index;
 static const __be32 *distance_ref_points;
 static int distance_lookup_table[MAX_NUMNODES][MAX_DISTANCE_REF_POINTS];
 
@@ -169,7 +169,7 @@ int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
 
 	int i, index;
 
-	for (i = 0; i < distance_ref_points_depth; i++) {
+	for (i = 0; i < max_associativity_domain_index; i++) {
 		index = be32_to_cpu(distance_ref_points[i]);
 		if (cpu1_assoc[index] == cpu2_assoc[index])
 			break;
@@ -193,7 +193,7 @@ int __node_distance(int a, int b)
 	if (!form1_affinity)
 		return ((a == b) ? LOCAL_DISTANCE : REMOTE_DISTANCE);
 
-	for (i = 0; i < distance_ref_points_depth; i++) {
+	for (i = 0; i < max_associativity_domain_index; i++) {
 		if (distance_lookup_table[a][i] == distance_lookup_table[b][i])
 			break;
 
@@ -213,7 +213,7 @@ static void initialize_distance_lookup_table(int nid,
 	if (!form1_affinity)
 		return;
 
-	for (i = 0; i < distance_ref_points_depth; i++) {
+	for (i = 0; i < max_associativity_domain_index; i++) {
 		const __be32 *entry;
 
 		entry = &associativity[be32_to_cpu(distance_ref_points[i]) - 1];
@@ -240,7 +240,7 @@ static int associativity_to_nid(const __be32 *associativity)
 		nid = NUMA_NO_NODE;
 
 	if (nid > 0 &&
-		of_read_number(associativity, 1) >= distance_ref_points_depth) {
+		of_read_number(associativity, 1) >= max_associativity_domain_index) {
 		/*
 		 * Skip the length field and send start of associativity array
 		 */
@@ -310,14 +310,14 @@ static int __init find_primary_domain_index(void)
 	 */
 	distance_ref_points = of_get_property(root,
 					"ibm,associativity-reference-points",
-					&distance_ref_points_depth);
+					&max_associativity_domain_index);
 
 	if (!distance_ref_points) {
 		dbg("NUMA: ibm,associativity-reference-points not found.\n");
 		goto err;
 	}
 
-	distance_ref_points_depth /= sizeof(int);
+	max_associativity_domain_index /= sizeof(int);
 
 	if (firmware_has_feature(FW_FEATURE_OPAL) ||
 	    firmware_has_feature(FW_FEATURE_TYPE1_AFFINITY)) {
@@ -328,7 +328,7 @@ static int __init find_primary_domain_index(void)
 	if (form1_affinity) {
 		index = of_read_number(distance_ref_points, 1);
 	} else {
-		if (distance_ref_points_depth < 2) {
+		if (max_associativity_domain_index < 2) {
 			printk(KERN_WARNING "NUMA: "
 				"short ibm,associativity-reference-points\n");
 			goto err;
@@ -341,10 +341,10 @@ static int __init find_primary_domain_index(void)
 	 * Warn and cap if the hardware supports more than
 	 * MAX_DISTANCE_REF_POINTS domains.
 	 */
-	if (distance_ref_points_depth > MAX_DISTANCE_REF_POINTS) {
+	if (max_associativity_domain_index > MAX_DISTANCE_REF_POINTS) {
 		printk(KERN_WARNING "NUMA: distance array capped at "
 			"%d entries\n", MAX_DISTANCE_REF_POINTS);
-		distance_ref_points_depth = MAX_DISTANCE_REF_POINTS;
+		max_associativity_domain_index = MAX_DISTANCE_REF_POINTS;
 	}
 
 	of_node_put(root);
-- 
2.31.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v3 3/8] powerpc/pseries: Rename TYPE1_AFFINITY to FORM1_AFFINITY
  2021-06-17  7:34 [PATCH v3 0/8] Add support for FORM2 associativity Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 1/8] powerpc/pseries: rename min_common_depth to primary_domain_index Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 2/8] powerpc/pseries: rename distance_ref_points_depth to max_associativity_domain_index Aneesh Kumar K.V
@ 2021-06-17  7:34 ` Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 4/8] powerpc/pseries: Consolidate DLPAR NUMA distance update Aneesh Kumar K.V
                   ` (4 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: Aneesh Kumar K.V @ 2021-06-17  7:34 UTC (permalink / raw)
  To: linuxppc-dev, mpe
  Cc: Nathan Lynch, David Gibson, Daniel Henrique Barboza, nvdimm,
	dan.j.williams, Aneesh Kumar K.V

Also make related code cleanup that will allow adding FORM2_AFFINITY in
later patches. No functional change in this patch.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 arch/powerpc/include/asm/firmware.h       |  4 +--
 arch/powerpc/include/asm/prom.h           |  2 +-
 arch/powerpc/kernel/prom_init.c           |  2 +-
 arch/powerpc/mm/numa.c                    | 35 ++++++++++++++---------
 arch/powerpc/platforms/pseries/firmware.c |  2 +-
 5 files changed, 26 insertions(+), 19 deletions(-)

diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h
index 7604673787d6..60b631161360 100644
--- a/arch/powerpc/include/asm/firmware.h
+++ b/arch/powerpc/include/asm/firmware.h
@@ -44,7 +44,7 @@
 #define FW_FEATURE_OPAL		ASM_CONST(0x0000000010000000)
 #define FW_FEATURE_SET_MODE	ASM_CONST(0x0000000040000000)
 #define FW_FEATURE_BEST_ENERGY	ASM_CONST(0x0000000080000000)
-#define FW_FEATURE_TYPE1_AFFINITY ASM_CONST(0x0000000100000000)
+#define FW_FEATURE_FORM1_AFFINITY ASM_CONST(0x0000000100000000)
 #define FW_FEATURE_PRRN		ASM_CONST(0x0000000200000000)
 #define FW_FEATURE_DRMEM_V2	ASM_CONST(0x0000000400000000)
 #define FW_FEATURE_DRC_INFO	ASM_CONST(0x0000000800000000)
@@ -69,7 +69,7 @@ enum {
 		FW_FEATURE_SPLPAR | FW_FEATURE_LPAR |
 		FW_FEATURE_CMO | FW_FEATURE_VPHN | FW_FEATURE_XCMO |
 		FW_FEATURE_SET_MODE | FW_FEATURE_BEST_ENERGY |
-		FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN |
+		FW_FEATURE_FORM1_AFFINITY | FW_FEATURE_PRRN |
 		FW_FEATURE_HPT_RESIZE | FW_FEATURE_DRMEM_V2 |
 		FW_FEATURE_DRC_INFO | FW_FEATURE_BLOCK_REMOVE |
 		FW_FEATURE_PAPR_SCM | FW_FEATURE_ULTRAVISOR |
diff --git a/arch/powerpc/include/asm/prom.h b/arch/powerpc/include/asm/prom.h
index 324a13351749..df9fec9d232c 100644
--- a/arch/powerpc/include/asm/prom.h
+++ b/arch/powerpc/include/asm/prom.h
@@ -147,7 +147,7 @@ extern int of_read_drc_info_cell(struct property **prop,
 #define OV5_MSI			0x0201	/* PCIe/MSI support */
 #define OV5_CMO			0x0480	/* Cooperative Memory Overcommitment */
 #define OV5_XCMO		0x0440	/* Page Coalescing */
-#define OV5_TYPE1_AFFINITY	0x0580	/* Type 1 NUMA affinity */
+#define OV5_FORM1_AFFINITY	0x0580	/* FORM1 NUMA affinity */
 #define OV5_PRRN		0x0540	/* Platform Resource Reassignment */
 #define OV5_HP_EVT		0x0604	/* Hot Plug Event support */
 #define OV5_RESIZE_HPT		0x0601	/* Hash Page Table resizing */
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 41ed7e33d897..64b9593038a7 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -1070,7 +1070,7 @@ static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
 #else
 		0,
 #endif
-		.associativity = OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN),
+		.associativity = OV5_FEAT(OV5_FORM1_AFFINITY) | OV5_FEAT(OV5_PRRN),
 		.bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT),
 		.micro_checkpoint = 0,
 		.reserved0 = 0,
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 132813dd1a6c..0ec16999beef 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -53,7 +53,10 @@ EXPORT_SYMBOL(node_data);
 
 static int primary_domain_index;
 static int n_mem_addr_cells, n_mem_size_cells;
-static int form1_affinity;
+
+#define FORM0_AFFINITY 0
+#define FORM1_AFFINITY 1
+static int affinity_form;
 
 #define MAX_DISTANCE_REF_POINTS 4
 static int max_associativity_domain_index;
@@ -190,7 +193,7 @@ int __node_distance(int a, int b)
 	int i;
 	int distance = LOCAL_DISTANCE;
 
-	if (!form1_affinity)
+	if (affinity_form == FORM0_AFFINITY)
 		return ((a == b) ? LOCAL_DISTANCE : REMOTE_DISTANCE);
 
 	for (i = 0; i < max_associativity_domain_index; i++) {
@@ -210,7 +213,7 @@ static void initialize_distance_lookup_table(int nid,
 {
 	int i;
 
-	if (!form1_affinity)
+	if (affinity_form != FORM1_AFFINITY)
 		return;
 
 	for (i = 0; i < max_associativity_domain_index; i++) {
@@ -289,6 +292,17 @@ static int __init find_primary_domain_index(void)
 	int index;
 	struct device_node *root;
 
+	/*
+	 * Check for which form of affinity.
+	 */
+	if (firmware_has_feature(FW_FEATURE_OPAL)) {
+		affinity_form = FORM1_AFFINITY;
+	} else if (firmware_has_feature(FW_FEATURE_FORM1_AFFINITY)) {
+		dbg("Using form 1 affinity\n");
+		affinity_form = FORM1_AFFINITY;
+	} else
+		affinity_form = FORM0_AFFINITY;
+
 	if (firmware_has_feature(FW_FEATURE_OPAL))
 		root = of_find_node_by_path("/ibm,opal");
 	else
@@ -318,23 +332,16 @@ static int __init find_primary_domain_index(void)
 	}
 
 	max_associativity_domain_index /= sizeof(int);
-
-	if (firmware_has_feature(FW_FEATURE_OPAL) ||
-	    firmware_has_feature(FW_FEATURE_TYPE1_AFFINITY)) {
-		dbg("Using form 1 affinity\n");
-		form1_affinity = 1;
-	}
-
-	if (form1_affinity) {
-		index = of_read_number(distance_ref_points, 1);
-	} else {
+	if (affinity_form == FORM0_AFFINITY) {
 		if (max_associativity_domain_index < 2) {
 			printk(KERN_WARNING "NUMA: "
-				"short ibm,associativity-reference-points\n");
+			       "short ibm,associativity-reference-points\n");
 			goto err;
 		}
 
 		index = of_read_number(&distance_ref_points[1], 1);
+	} else {
+		index = of_read_number(distance_ref_points, 1);
 	}
 
 	/*
diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c
index 4c7b7f5a2ebc..5d4c2bc20bba 100644
--- a/arch/powerpc/platforms/pseries/firmware.c
+++ b/arch/powerpc/platforms/pseries/firmware.c
@@ -119,7 +119,7 @@ struct vec5_fw_feature {
 
 static __initdata struct vec5_fw_feature
 vec5_fw_features_table[] = {
-	{FW_FEATURE_TYPE1_AFFINITY,	OV5_TYPE1_AFFINITY},
+	{FW_FEATURE_FORM1_AFFINITY,	OV5_FORM1_AFFINITY},
 	{FW_FEATURE_PRRN,		OV5_PRRN},
 	{FW_FEATURE_DRMEM_V2,		OV5_DRMEM_V2},
 	{FW_FEATURE_DRC_INFO,		OV5_DRC_INFO},
-- 
2.31.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v3 4/8] powerpc/pseries: Consolidate DLPAR NUMA distance update
  2021-06-17  7:34 [PATCH v3 0/8] Add support for FORM2 associativity Aneesh Kumar K.V
                   ` (2 preceding siblings ...)
  2021-06-17  7:34 ` [PATCH v3 3/8] powerpc/pseries: Rename TYPE1_AFFINITY to FORM1_AFFINITY Aneesh Kumar K.V
@ 2021-06-17  7:34 ` Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 5/8] powerpc/pseries: Consolidate NUMA distance update during boot Aneesh Kumar K.V
                   ` (3 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: Aneesh Kumar K.V @ 2021-06-17  7:34 UTC (permalink / raw)
  To: linuxppc-dev, mpe
  Cc: Nathan Lynch, David Gibson, Daniel Henrique Barboza, nvdimm,
	dan.j.williams, Aneesh Kumar K.V

The associativity details of the newly added resourced are collected from
the hypervisor via "ibm,configure-connector" rtas call. Update the numa
distance details of the newly added numa node after the above call. In
later patch we will remove updating NUMA distance when we are looking
for node id from associativity array.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 arch/powerpc/mm/numa.c                        | 41 +++++++++++++++++++
 arch/powerpc/platforms/pseries/hotplug-cpu.c  |  2 +
 .../platforms/pseries/hotplug-memory.c        |  2 +
 arch/powerpc/platforms/pseries/pseries.h      |  1 +
 4 files changed, 46 insertions(+)

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 0ec16999beef..645a95e3a7ea 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -287,6 +287,47 @@ int of_node_to_nid(struct device_node *device)
 }
 EXPORT_SYMBOL(of_node_to_nid);
 
+static void __initialize_form1_numa_distance(const __be32 *associativity)
+{
+	int i, nid;
+
+	if (of_read_number(associativity, 1) >= primary_domain_index) {
+		nid = of_read_number(&associativity[primary_domain_index], 1);
+
+		for (i = 0; i < max_domain_index; i++) {
+			const __be32 *entry;
+
+			entry = &associativity[be32_to_cpu(distance_ref_points[i])];
+			distance_lookup_table[nid][i] = of_read_number(entry, 1);
+		}
+	}
+}
+
+static void initialize_form1_numa_distance(struct device_node *node)
+{
+	const __be32 *associativity;
+
+	associativity = of_get_associativity(node);
+	if (!associativity)
+		return;
+
+	__initialize_form1_numa_distance(associativity);
+	return;
+}
+
+/*
+ * Used to update distance information w.r.t newly added node.
+ */
+void update_numa_distance(struct device_node *node)
+{
+	if (affinity_form == FORM0_AFFINITY)
+		return;
+	else if (affinity_form == FORM1_AFFINITY) {
+		initialize_form1_numa_distance(node);
+		return;
+	}
+}
+
 static int __init find_primary_domain_index(void)
 {
 	int index;
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 7e970f81d8ff..778b6ab35f0d 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -498,6 +498,8 @@ static ssize_t dlpar_cpu_add(u32 drc_index)
 		return saved_rc;
 	}
 
+	update_numa_distance(dn);
+
 	rc = dlpar_online_cpu(dn);
 	if (rc) {
 		saved_rc = rc;
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index 8377f1f7c78e..0e602c3b01ea 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -180,6 +180,8 @@ static int update_lmb_associativity_index(struct drmem_lmb *lmb)
 		return -ENODEV;
 	}
 
+	update_numa_distance(lmb_node);
+
 	dr_node = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
 	if (!dr_node) {
 		dlpar_free_cc_nodes(lmb_node);
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index 1f051a786fb3..663a0859cf13 100644
--- a/arch/powerpc/platforms/pseries/pseries.h
+++ b/arch/powerpc/platforms/pseries/pseries.h
@@ -113,4 +113,5 @@ extern u32 pseries_security_flavor;
 void pseries_setup_security_mitigations(void);
 void pseries_lpar_read_hblkrm_characteristics(void);
 
+void update_numa_distance(struct device_node *node);
 #endif /* _PSERIES_PSERIES_H */
-- 
2.31.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v3 5/8] powerpc/pseries: Consolidate NUMA distance update during boot
  2021-06-17  7:34 [PATCH v3 0/8] Add support for FORM2 associativity Aneesh Kumar K.V
                   ` (3 preceding siblings ...)
  2021-06-17  7:34 ` [PATCH v3 4/8] powerpc/pseries: Consolidate DLPAR NUMA distance update Aneesh Kumar K.V
@ 2021-06-17  7:34 ` Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 6/8] powerpc/pseries: Add a helper for form1 cpu distance Aneesh Kumar K.V
                   ` (2 subsequent siblings)
  7 siblings, 0 replies; 9+ messages in thread
From: Aneesh Kumar K.V @ 2021-06-17  7:34 UTC (permalink / raw)
  To: linuxppc-dev, mpe
  Cc: Nathan Lynch, David Gibson, Daniel Henrique Barboza, nvdimm,
	dan.j.williams, Aneesh Kumar K.V

Instead of updating NUMA distance every time we lookup a node id
from the associativity property, add helpers that can be used
during boot which does this only once. Also remove the distance
update from node id lookup helpers.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 arch/powerpc/mm/numa.c | 135 +++++++++++++++++++++++++++--------------
 1 file changed, 88 insertions(+), 47 deletions(-)

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 645a95e3a7ea..c481f08d565b 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -208,22 +208,6 @@ int __node_distance(int a, int b)
 }
 EXPORT_SYMBOL(__node_distance);
 
-static void initialize_distance_lookup_table(int nid,
-		const __be32 *associativity)
-{
-	int i;
-
-	if (affinity_form != FORM1_AFFINITY)
-		return;
-
-	for (i = 0; i < max_associativity_domain_index; i++) {
-		const __be32 *entry;
-
-		entry = &associativity[be32_to_cpu(distance_ref_points[i]) - 1];
-		distance_lookup_table[nid][i] = of_read_number(entry, 1);
-	}
-}
-
 /*
  * Returns nid in the range [0..nr_node_ids], or -1 if no useful NUMA
  * info is found.
@@ -241,15 +225,6 @@ static int associativity_to_nid(const __be32 *associativity)
 	/* POWER4 LPAR uses 0xffff as invalid node */
 	if (nid == 0xffff || nid >= nr_node_ids)
 		nid = NUMA_NO_NODE;
-
-	if (nid > 0 &&
-		of_read_number(associativity, 1) >= max_associativity_domain_index) {
-		/*
-		 * Skip the length field and send start of associativity array
-		 */
-		initialize_distance_lookup_table(nid, associativity + 1);
-	}
-
 out:
 	return nid;
 }
@@ -291,10 +266,13 @@ static void __initialize_form1_numa_distance(const __be32 *associativity)
 {
 	int i, nid;
 
+	if (affinity_form != FORM1_AFFINITY)
+		return;
+
 	if (of_read_number(associativity, 1) >= primary_domain_index) {
 		nid = of_read_number(&associativity[primary_domain_index], 1);
 
-		for (i = 0; i < max_domain_index; i++) {
+		for (i = 0; i < max_associativity_domain_index; i++) {
 			const __be32 *entry;
 
 			entry = &associativity[be32_to_cpu(distance_ref_points[i])];
@@ -474,6 +452,48 @@ static int of_get_assoc_arrays(struct assoc_arrays *aa)
 	return 0;
 }
 
+static int get_nid_and_numa_distance(struct drmem_lmb *lmb)
+{
+	struct assoc_arrays aa = { .arrays = NULL };
+	int default_nid = NUMA_NO_NODE;
+	int nid = default_nid;
+	int rc, index;
+
+	if ((primary_domain_index < 0) || !numa_enabled)
+		return default_nid;
+
+	rc = of_get_assoc_arrays(&aa);
+	if (rc)
+		return default_nid;
+
+	if (primary_domain_index <= aa.array_sz &&
+	    !(lmb->flags & DRCONF_MEM_AI_INVALID) && lmb->aa_index < aa.n_arrays) {
+		index = lmb->aa_index * aa.array_sz + primary_domain_index - 1;
+		nid = of_read_number(&aa.arrays[index], 1);
+
+		if (nid == 0xffff || nid >= nr_node_ids)
+			nid = default_nid;
+		if (nid > 0 && affinity_form == FORM1_AFFINITY) {
+			int i;
+			const __be32 *associativity;
+
+			index = lmb->aa_index * aa.array_sz;
+			associativity = &aa.arrays[index];
+			/*
+			 * lookup array associativity entries have different format
+			 * There is no length of the array as the first element.
+			 */
+			for (i = 0; i < max_associativity_domain_index; i++) {
+				const __be32 *entry;
+
+				entry = &associativity[be32_to_cpu(distance_ref_points[i]) - 1];
+				distance_lookup_table[nid][i] = of_read_number(entry, 1);
+			}
+		}
+	}
+	return nid;
+}
+
 /*
  * This is like of_node_to_nid_single() for memory represented in the
  * ibm,dynamic-reconfiguration-memory node.
@@ -499,21 +519,14 @@ int of_drconf_to_nid_single(struct drmem_lmb *lmb)
 
 		if (nid == 0xffff || nid >= nr_node_ids)
 			nid = default_nid;
-
-		if (nid > 0) {
-			index = lmb->aa_index * aa.array_sz;
-			initialize_distance_lookup_table(nid,
-							&aa.arrays[index]);
-		}
 	}
-
 	return nid;
 }
 
 #ifdef CONFIG_PPC_SPLPAR
-static int vphn_get_nid(long lcpu)
+
+static int __vphn_get_associativity(long lcpu, __be32 *associativity)
 {
-	__be32 associativity[VPHN_ASSOC_BUFSIZE] = {0};
 	long rc, hwid;
 
 	/*
@@ -533,10 +546,22 @@ static int vphn_get_nid(long lcpu)
 
 		rc = hcall_vphn(hwid, VPHN_FLAG_VCPU, associativity);
 		if (rc == H_SUCCESS)
-			return associativity_to_nid(associativity);
+			return 0;
 	}
 
+	return -1;
+}
+
+static int vphn_get_nid(long lcpu)
+{
+	__be32 associativity[VPHN_ASSOC_BUFSIZE] = {0};
+
+
+	if (!__vphn_get_associativity(lcpu, associativity))
+		return associativity_to_nid(associativity);
+
 	return NUMA_NO_NODE;
+
 }
 #else
 static int vphn_get_nid(long unused)
@@ -733,7 +758,7 @@ static int __init numa_setup_drmem_lmb(struct drmem_lmb *lmb,
 			size = read_n_cells(n_mem_size_cells, usm);
 		}
 
-		nid = of_drconf_to_nid_single(lmb);
+		nid = get_nid_and_numa_distance(lmb);
 		fake_numa_create_new_node(((base + size) >> PAGE_SHIFT),
 					  &nid);
 		node_set_online(nid);
@@ -750,6 +775,7 @@ static int __init parse_numa_properties(void)
 	struct device_node *memory;
 	int default_nid = 0;
 	unsigned long i;
+	const __be32 *associativity;
 
 	if (numa_enabled == 0) {
 		printk(KERN_WARNING "NUMA disabled by user\n");
@@ -775,18 +801,30 @@ static int __init parse_numa_properties(void)
 	 * each node to be onlined must have NODE_DATA etc backing it.
 	 */
 	for_each_present_cpu(i) {
+		__be32 vphn_assoc[VPHN_ASSOC_BUFSIZE];
 		struct device_node *cpu;
-		int nid = vphn_get_nid(i);
+		int nid = NUMA_NO_NODE;
 
-		/*
-		 * Don't fall back to default_nid yet -- we will plug
-		 * cpus into nodes once the memory scan has discovered
-		 * the topology.
-		 */
-		if (nid == NUMA_NO_NODE) {
+		memset(vphn_assoc, 0, VPHN_ASSOC_BUFSIZE * sizeof(__be32));
+
+		if (__vphn_get_associativity(i, vphn_assoc) == 0) {
+			nid = associativity_to_nid(vphn_assoc);
+			__initialize_form1_numa_distance(vphn_assoc);
+		} else {
+
+			/*
+			 * Don't fall back to default_nid yet -- we will plug
+			 * cpus into nodes once the memory scan has discovered
+			 * the topology.
+			 */
 			cpu = of_get_cpu_node(i, NULL);
 			BUG_ON(!cpu);
-			nid = of_node_to_nid_single(cpu);
+
+			associativity = of_get_associativity(cpu);
+			if (associativity) {
+				nid = associativity_to_nid(associativity);
+				__initialize_form1_numa_distance(associativity);
+			}
 			of_node_put(cpu);
 		}
 
@@ -822,8 +860,11 @@ static int __init parse_numa_properties(void)
 		 * have associativity properties.  If none, then
 		 * everything goes to default_nid.
 		 */
-		nid = of_node_to_nid_single(memory);
-		if (nid < 0)
+		associativity = of_get_associativity(memory);
+		if (associativity) {
+			nid = associativity_to_nid(associativity);
+			__initialize_form1_numa_distance(associativity);
+		} else
 			nid = default_nid;
 
 		fake_numa_create_new_node(((start + size) >> PAGE_SHIFT), &nid);
-- 
2.31.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v3 6/8] powerpc/pseries: Add a helper for form1 cpu distance
  2021-06-17  7:34 [PATCH v3 0/8] Add support for FORM2 associativity Aneesh Kumar K.V
                   ` (4 preceding siblings ...)
  2021-06-17  7:34 ` [PATCH v3 5/8] powerpc/pseries: Consolidate NUMA distance update during boot Aneesh Kumar K.V
@ 2021-06-17  7:34 ` Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 7/8] powerpc/pseries: Add support for FORM2 associativity Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 8/8] powerpc/papr_scm: Use FORM2 associativity details Aneesh Kumar K.V
  7 siblings, 0 replies; 9+ messages in thread
From: Aneesh Kumar K.V @ 2021-06-17  7:34 UTC (permalink / raw)
  To: linuxppc-dev, mpe
  Cc: Nathan Lynch, David Gibson, Daniel Henrique Barboza, nvdimm,
	dan.j.williams, Aneesh Kumar K.V

This helper is only used with the dispatch trace log collection.
A later patch will add Form2 affinity support and this change helps
in keeping that simpler. Also add a comment explaining we don't expect
the code to be called with FORM0

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 arch/powerpc/mm/numa.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index c481f08d565b..d32729f235b8 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -166,7 +166,7 @@ static void unmap_cpu_from_node(unsigned long cpu)
 }
 #endif /* CONFIG_HOTPLUG_CPU || CONFIG_PPC_SPLPAR */
 
-int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
+static int __cpu_form1_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
 {
 	int dist = 0;
 
@@ -182,6 +182,14 @@ int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
 	return dist;
 }
 
+int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
+{
+	/* We should not get called with FORM0 */
+	VM_WARN_ON(affinity_form == FORM0_AFFINITY);
+
+	return __cpu_form1_distance(cpu1_assoc, cpu2_assoc);
+}
+
 /* must hold reference to node during call */
 static const __be32 *of_get_associativity(struct device_node *dev)
 {
-- 
2.31.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v3 7/8] powerpc/pseries: Add support for FORM2 associativity
  2021-06-17  7:34 [PATCH v3 0/8] Add support for FORM2 associativity Aneesh Kumar K.V
                   ` (5 preceding siblings ...)
  2021-06-17  7:34 ` [PATCH v3 6/8] powerpc/pseries: Add a helper for form1 cpu distance Aneesh Kumar K.V
@ 2021-06-17  7:34 ` Aneesh Kumar K.V
  2021-06-17  7:34 ` [PATCH v3 8/8] powerpc/papr_scm: Use FORM2 associativity details Aneesh Kumar K.V
  7 siblings, 0 replies; 9+ messages in thread
From: Aneesh Kumar K.V @ 2021-06-17  7:34 UTC (permalink / raw)
  To: linuxppc-dev, mpe
  Cc: Nathan Lynch, David Gibson, Daniel Henrique Barboza, nvdimm,
	dan.j.williams, Aneesh Kumar K.V

PAPR interface currently supports two different ways of communicating resource
grouping details to the OS. These are referred to as Form 0 and Form 1
associativity grouping. Form 0 is the older format and is now considered
deprecated. This patch adds another resource grouping named FORM2.

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 Documentation/powerpc/associativity.rst   | 177 ++++++++++++++++++++++
 arch/powerpc/include/asm/firmware.h       |   3 +-
 arch/powerpc/include/asm/prom.h           |   1 +
 arch/powerpc/kernel/prom_init.c           |   3 +-
 arch/powerpc/mm/numa.c                    | 149 +++++++++++++++++-
 arch/powerpc/platforms/pseries/firmware.c |   1 +
 6 files changed, 328 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/powerpc/associativity.rst

diff --git a/Documentation/powerpc/associativity.rst b/Documentation/powerpc/associativity.rst
new file mode 100644
index 000000000000..5fa9352dfc05
--- /dev/null
+++ b/Documentation/powerpc/associativity.rst
@@ -0,0 +1,177 @@
+============================
+NUMA resource associativity
+=============================
+
+Associativity represents the groupings of the various platform resources into
+domains of substantially similar mean performance relative to resources outside
+of that domain. Resources subsets of a given domain that exhibit better
+performance relative to each other than relative to other resources subsets
+are represented as being members of a sub-grouping domain. This performance
+characteristic is presented in terms of NUMA node distance within the Linux kernel.
+From the platform view, these groups are also referred to as domains.
+
+PAPR interface currently supports different ways of communicating these resource
+grouping details to the OS. These are referred to as Form 0, Form 1 and Form2
+associativity grouping. Form 0 is the older format and is now considered deprecated.
+
+Hypervisor indicates the type/form of associativity used via "ibm,arcitecture-vec-5 property".
+Bit 0 of byte 5 in the "ibm,architecture-vec-5" property indicates usage of Form 0 or Form 1.
+A value of 1 indicates the usage of Form 1 associativity. For Form 2 associativity
+bit 2 of byte 5 in the "ibm,architecture-vec-5" property is used.
+
+Form 0
+-----
+Form 0 associativity supports only two NUMA distance (LOCAL and REMOTE).
+
+Form 1
+-----
+With Form 1 a combination of ibm,associativity-reference-points and ibm,associativity
+device tree properties are used to determine the NUMA distance between resource groups/domains.
+
+The “ibm,associativity” property contains one or more lists of numbers (domainID)
+representing the resource’s platform grouping domains.
+
+The “ibm,associativity-reference-points” property contains one or more list of numbers
+(domainID index) that represents the 1 based ordinal in the associativity lists of the
+least significant boundary, with subsequent entries indicating progressively higher
+significant boundaries.
+
+ex:
+{ primary domainID index, secondary domainID index, tertiary domainID index.. }
+
+Linux kernel uses the domainID of the least significant boundary (aka primary domain)
+as the NUMA node id. Linux kernel computes NUMA distance between two domains by
+recursively comparing if they belong to the same higher-level domains. For mismatch
+at every higher level of the resource group, the kernel doubles the NUMA distance between
+the comparing domains.
+
+Form 2
+-------
+Form 2 associativity format adds separate device tree properties representing NUMA node distance
+thereby making the node distance computation flexible. Form 2 also allows flexible primary
+domain numbering. With numa distance computation now detached from the index value of
+"ibm,associativity" property, Form 2 allows a large number of primary domain ids at the
+same domainID index representing resource groups of different performance/latency characteristics.
+
+Hypervisor indicates the usage of FORM2 associativity using bit 2 of byte 5 in the
+"ibm,architecture-vec-5" property.
+
+"ibm,numa-lookup-index-table" property contains one or more list numbers representing
+the domainIDs present in the system. The offset of the domainID in this property is considered
+the domainID index.
+
+prop-encoded-array: The number N of the domainIDs encoded as with encode-int, followed by
+N domainID encoded as with encode-int
+
+For ex:
+ibm,numa-lookup-index-table =  {4, 0, 8, 250, 252}, domainID index for domainID 8 is 1.
+
+"ibm,numa-distance-table" property contains one or more list of numbers representing the NUMA
+distance between resource groups/domains present in the system.
+
+prop-encoded-array: The number N of the distance values encoded as with encode-int, followed by
+N distance values encoded as with encode-bytes. The max distance value we could encode is 255.
+
+For ex:
+ibm,numa-lookup-index-table =  {3, 0, 8, 40}
+ibm,numa-distance-table     =  {9, 10, 20, 80, 20, 10, 160, 80, 160, 10}
+
+  | 0    8   40
+--|------------
+  |
+0 | 10   20  80
+  |
+8 | 20   10  160
+  |
+40| 80   160  10
+
+With Form2 "ibm,associativity" for resources is listed as below:
+
+"ibm,associativity" property for resources in node 0, 8 and 40
+{ 4, 6, 7, 0, 0}
+{ 4, 6, 9, 8, 8}
+{ 4, 6, 7, 0, 40}
+
+With "ibm,associativity-reference-points"  { 0x4, 0x3, 0x2 }
+
+With Form2 the primary domainID and secondary domainID are used to identify the NUMA nodes
+the kernel should use when using persistent memory devices. Persistent memory devices
+can also be used as regular memory using DAX KMEM driver and primary domainID indicates
+the numa node number OS should use when using these devices as regular memory. Secondary
+domainID is the numa node number that should be used when using this device as
+persistent memory device. In the later case, we are interested in the locality of the
+device to an established numa node. In the above example, if the last row represents a
+persistent memory device/resource, NUMA node number 40 will be used when using the device
+as regular memory and NUMA node number 0 will be the device numa node when using it as
+a persistent memory device.
+
+ex:
+
+   --------------------------------------
+  |                            NUMA node0 |
+  |    ProcA -----> MEMA                  |
+  |     |                                 |
+  |	|                                 |
+  |	-------------------> PMEMB        |
+  |                                       |
+   ---------------------------------------
+
+   ---------------------------------------
+  |                            NUMA node1 |
+  |                                       |
+  |    ProcB -------> MEMC                |
+  |	|                                 |
+  |	-------------------> PMEMD        |
+  |                                       |
+  |                                       |
+   ---------------------------------------
+
+
+For a topology like the above application running of ProcA wants to find out
+persistent memory mount local to its NUMA node. Hence when using it as
+pmem fsdax mount or devdax device we want PMEMB to have associativity
+of NUMA node0 and PMEMD to have associativity of NUMA node1. But when
+we want to use it as memory using dax kmem driver, we want both PMEMB
+and PMEMD to appear as memory only NUMA node at a distance that is
+derived based on the latency of the media.
+
+Each resource (drcIndex) now also supports additional optional device tree properties.
+These properties are marked optional because the platform can choose not to export
+them and provide the system topology details using the earlier defined device tree
+properties alone. The optional device tree properties are used when adding new resources
+(DLPAR) and when the platform didn't provide the topology details of the domain which
+contains the newly added resource during boot.
+
+"ibm,numa-lookup-index" property contains a number representing the domainID index to be used
+when building the NUMA distance of the numa node to which this resource belongs. This can
+be looked at as the index at which this new domainID would have appeared in
+"ibm,numa-lookup-index-table" if the domain was present during boot. The domainID
+of the new resource can be obtained from the existing "ibm,associativity" property. This
+can be used to build distance information of a newly onlined NUMA node via DLPAR operation.
+The value is 1 based array index value.
+
+prop-encoded-array: An integer encoded as with encode-int specifying the domainID index
+
+"ibm,numa-distance" property contains one or more list of numbers presenting the NUMA distance
+from this resource domain to other resources.
+
+prop-encoded-array: The number N of the distance values encoded as with encode-int, followed by
+N distance values encoded as with encode-bytes. The max distance value we could encode is 255.
+
+For ex:
+ibm,associativity     = { 4, 5, 6, 7, 50}
+ibm,numa-lookup-index = { 4 }
+ibm,numa-distance   =  {8, 160, 255, 80, 10, 160, 255, 80, 10}
+
+resulting in a new toplogy as below.
+  | 0    8   40   50
+--|------------------
+  |
+0 | 10   20  80   160
+  |
+8 | 20   10  160  255
+  |
+40| 80   160  10  80
+  |
+50| 160  255  80  10
+
diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h
index 60b631161360..97a3bd9ffeb9 100644
--- a/arch/powerpc/include/asm/firmware.h
+++ b/arch/powerpc/include/asm/firmware.h
@@ -53,6 +53,7 @@
 #define FW_FEATURE_ULTRAVISOR	ASM_CONST(0x0000004000000000)
 #define FW_FEATURE_STUFF_TCE	ASM_CONST(0x0000008000000000)
 #define FW_FEATURE_RPT_INVALIDATE ASM_CONST(0x0000010000000000)
+#define FW_FEATURE_FORM2_AFFINITY ASM_CONST(0x0000020000000000)
 
 #ifndef __ASSEMBLY__
 
@@ -73,7 +74,7 @@ enum {
 		FW_FEATURE_HPT_RESIZE | FW_FEATURE_DRMEM_V2 |
 		FW_FEATURE_DRC_INFO | FW_FEATURE_BLOCK_REMOVE |
 		FW_FEATURE_PAPR_SCM | FW_FEATURE_ULTRAVISOR |
-		FW_FEATURE_RPT_INVALIDATE,
+		FW_FEATURE_RPT_INVALIDATE | FW_FEATURE_FORM2_AFFINITY,
 	FW_FEATURE_PSERIES_ALWAYS = 0,
 	FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL | FW_FEATURE_ULTRAVISOR,
 	FW_FEATURE_POWERNV_ALWAYS = 0,
diff --git a/arch/powerpc/include/asm/prom.h b/arch/powerpc/include/asm/prom.h
index df9fec9d232c..5c80152e8f18 100644
--- a/arch/powerpc/include/asm/prom.h
+++ b/arch/powerpc/include/asm/prom.h
@@ -149,6 +149,7 @@ extern int of_read_drc_info_cell(struct property **prop,
 #define OV5_XCMO		0x0440	/* Page Coalescing */
 #define OV5_FORM1_AFFINITY	0x0580	/* FORM1 NUMA affinity */
 #define OV5_PRRN		0x0540	/* Platform Resource Reassignment */
+#define OV5_FORM2_AFFINITY	0x0520	/* Form2 NUMA affinity */
 #define OV5_HP_EVT		0x0604	/* Hot Plug Event support */
 #define OV5_RESIZE_HPT		0x0601	/* Hash Page Table resizing */
 #define OV5_PFO_HW_RNG		0x1180	/* PFO Random Number Generator */
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 64b9593038a7..496fdac54c29 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -1070,7 +1070,8 @@ static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
 #else
 		0,
 #endif
-		.associativity = OV5_FEAT(OV5_FORM1_AFFINITY) | OV5_FEAT(OV5_PRRN),
+		.associativity = OV5_FEAT(OV5_FORM1_AFFINITY) | OV5_FEAT(OV5_PRRN) |
+		OV5_FEAT(OV5_FORM2_AFFINITY),
 		.bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT),
 		.micro_checkpoint = 0,
 		.reserved0 = 0,
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index d32729f235b8..5a7d94960fb7 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -56,12 +56,17 @@ static int n_mem_addr_cells, n_mem_size_cells;
 
 #define FORM0_AFFINITY 0
 #define FORM1_AFFINITY 1
+#define FORM2_AFFINITY 2
 static int affinity_form;
 
 #define MAX_DISTANCE_REF_POINTS 4
 static int max_associativity_domain_index;
 static const __be32 *distance_ref_points;
 static int distance_lookup_table[MAX_NUMNODES][MAX_DISTANCE_REF_POINTS];
+static int numa_distance_table[MAX_NUMNODES][MAX_NUMNODES] = {
+	[0 ... MAX_NUMNODES - 1] = { [0 ... MAX_NUMNODES - 1] = -1 }
+};
+static int numa_id_index_table[MAX_NUMNODES];
 
 /*
  * Allocate node_to_cpumask_map based on number of available nodes
@@ -166,6 +171,27 @@ static void unmap_cpu_from_node(unsigned long cpu)
 }
 #endif /* CONFIG_HOTPLUG_CPU || CONFIG_PPC_SPLPAR */
 
+/*
+ * With FORM2 if we are not using logical domain ids, we will find
+ * both primary and seconday domains with same value. Hence always
+ * start comparison from secondary domains
+ */
+static int __cpu_form2_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
+{
+	int dist = 0;
+
+	int i, index;
+
+	for (i = 1; i < max_associativity_domain_index; i++) {
+		index = be32_to_cpu(distance_ref_points[i]);
+		if (cpu1_assoc[index] == cpu2_assoc[index])
+			break;
+		dist++;
+	}
+
+	return dist;
+}
+
 static int __cpu_form1_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
 {
 	int dist = 0;
@@ -178,7 +204,6 @@ static int __cpu_form1_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
 			break;
 		dist++;
 	}
-
 	return dist;
 }
 
@@ -186,8 +211,9 @@ int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
 {
 	/* We should not get called with FORM0 */
 	VM_WARN_ON(affinity_form == FORM0_AFFINITY);
-
-	return __cpu_form1_distance(cpu1_assoc, cpu2_assoc);
+	if (affinity_form == FORM1_AFFINITY)
+		return __cpu_form1_distance(cpu1_assoc, cpu2_assoc);
+	return __cpu_form2_distance(cpu1_assoc, cpu2_assoc);
 }
 
 /* must hold reference to node during call */
@@ -201,7 +227,9 @@ int __node_distance(int a, int b)
 	int i;
 	int distance = LOCAL_DISTANCE;
 
-	if (affinity_form == FORM0_AFFINITY)
+	if (affinity_form == FORM2_AFFINITY)
+		return numa_distance_table[a][b];
+	else if (affinity_form == FORM0_AFFINITY)
 		return ((a == b) ? LOCAL_DISTANCE : REMOTE_DISTANCE);
 
 	for (i = 0; i < max_associativity_domain_index; i++) {
@@ -303,15 +331,116 @@ static void initialize_form1_numa_distance(struct device_node *node)
 
 /*
  * Used to update distance information w.r.t newly added node.
+ * ibm,numa-lookup-index -> 4
+ * ibm,numa-distance -> {5, 20, 40, 60, 80, 10 }
  */
 void update_numa_distance(struct device_node *node)
 {
+	int i, nid, other_nid, other_nid_index = 0;
+	const __be32 *numa_indexp;
+	const __u8  *numa_distancep;
+	int numa_index, max_numa_index, numa_distance;
+
 	if (affinity_form == FORM0_AFFINITY)
 		return;
 	else if (affinity_form == FORM1_AFFINITY) {
 		initialize_form1_numa_distance(node);
 		return;
 	}
+	/* FORM2 affinity  */
+
+	nid = of_node_to_nid_single(node);
+	if (nid == NUMA_NO_NODE)
+		return;
+
+	/* Already initialized */
+	if (numa_distance_table[nid][nid] != -1)
+		return;
+	/*
+	 * update node distance if not already populated.
+	 */
+	numa_distancep = of_get_property(node, "ibm,numa-distance", NULL);
+	if (!numa_distancep)
+		return;
+
+	numa_indexp = of_get_property(node, "ibm,numa-lookup-index", NULL);
+	if (!numa_indexp)
+		return;
+
+	numa_index = of_read_number(numa_indexp, 1);
+	/*
+	 * update the numa_id_index_table. Device tree look at index table as
+	 * 1 based array indexing.
+	 */
+	numa_id_index_table[numa_index - 1] = nid;
+
+	max_numa_index = of_read_number((const __be32 *)numa_distancep, 1);
+	VM_WARN_ON(max_numa_index != 2 * numa_index);
+	/* Skip the size which is encoded int */
+	numa_distancep += sizeof(__be32);
+
+	/*
+	 * First fill the distance information from other node to this node.
+	 */
+	other_nid_index = 0;
+	for (i = 0; i < numa_index; i++) {
+		numa_distance = numa_distancep[i];
+		other_nid = numa_id_index_table[other_nid_index++];
+		numa_distance_table[other_nid][nid] = numa_distance;
+	}
+
+	other_nid_index = 0;
+	for (; i < max_numa_index; i++) {
+		numa_distance = numa_distancep[i];
+		other_nid = numa_id_index_table[other_nid_index++];
+		numa_distance_table[nid][other_nid] = numa_distance;
+	}
+}
+
+/*
+ * ibm,numa-lookup-index-table= {N, domainid1, domainid2, ..... domainidN}
+ * ibm,numa-distance-table = { N, 1, 2, 4, 5, 1, 6, .... N elements}
+ */
+static void initialize_form2_numa_distance_lookup_table(struct device_node *root)
+{
+	const __u8 *numa_dist_table;
+	const __be32 *numa_lookup_index;
+	int numa_dist_table_length;
+	int max_numa_index, distance_index;
+	int i, curr_row = 0, curr_column = 0;
+
+	numa_lookup_index = of_get_property(root, "ibm,numa-lookup-index-table", NULL);
+	max_numa_index = of_read_number(&numa_lookup_index[0], 1);
+
+	/* first element of the array is the size and is encode-int */
+	numa_dist_table = of_get_property(root, "ibm,numa-distance-table", NULL);
+	numa_dist_table_length = of_read_number((const __be32 *)&numa_dist_table[0], 1);
+	/* Skip the size which is encoded int */
+	numa_dist_table += sizeof(__be32);
+
+	pr_debug("numa_dist_table_len = %d, numa_dist_indexes_len = %d \n",
+		 numa_dist_table_length, max_numa_index);
+
+	for (i = 0; i < max_numa_index; i++)
+		/* +1 skip the max_numa_index in the property */
+		numa_id_index_table[i] = of_read_number(&numa_lookup_index[i + 1], 1);
+
+
+	VM_WARN_ON(numa_dist_table_length != max_numa_index * max_numa_index);
+
+	for (distance_index = 0; distance_index < numa_dist_table_length; distance_index++) {
+		int nodeA = numa_id_index_table[curr_row];
+		int nodeB = numa_id_index_table[curr_column++];
+
+		numa_distance_table[nodeA][nodeB] = numa_dist_table[distance_index];
+
+		pr_debug("dist[%d][%d]=%d ", nodeA, nodeB, numa_distance_table[nodeA][nodeB]);
+		if (curr_column >= max_numa_index) {
+			curr_row++;
+			/* reset the column */
+			curr_column = 0;
+		}
+	}
 }
 
 static int __init find_primary_domain_index(void)
@@ -324,6 +453,9 @@ static int __init find_primary_domain_index(void)
 	 */
 	if (firmware_has_feature(FW_FEATURE_OPAL)) {
 		affinity_form = FORM1_AFFINITY;
+	} else if (firmware_has_feature(FW_FEATURE_FORM2_AFFINITY)) {
+		dbg("Using form 2 affinity\n");
+		affinity_form = FORM2_AFFINITY;
 	} else if (firmware_has_feature(FW_FEATURE_FORM1_AFFINITY)) {
 		dbg("Using form 1 affinity\n");
 		affinity_form = FORM1_AFFINITY;
@@ -368,8 +500,17 @@ static int __init find_primary_domain_index(void)
 
 		index = of_read_number(&distance_ref_points[1], 1);
 	} else {
+		/*
+		 * Both FORM1 and FORM2 affinity find the primary domain details
+		 * at the same offset.
+		 */
 		index = of_read_number(distance_ref_points, 1);
 	}
+	/*
+	 * If it is FORM2 also initialize the distance table here.
+	 */
+	if (affinity_form == FORM2_AFFINITY)
+		initialize_form2_numa_distance_lookup_table(root);
 
 	/*
 	 * Warn and cap if the hardware supports more than
diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c
index 5d4c2bc20bba..f162156b7b68 100644
--- a/arch/powerpc/platforms/pseries/firmware.c
+++ b/arch/powerpc/platforms/pseries/firmware.c
@@ -123,6 +123,7 @@ vec5_fw_features_table[] = {
 	{FW_FEATURE_PRRN,		OV5_PRRN},
 	{FW_FEATURE_DRMEM_V2,		OV5_DRMEM_V2},
 	{FW_FEATURE_DRC_INFO,		OV5_DRC_INFO},
+	{FW_FEATURE_FORM2_AFFINITY,	OV5_FORM2_AFFINITY},
 };
 
 static void __init fw_vec5_feature_init(const char *vec5, unsigned long len)
-- 
2.31.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v3 8/8] powerpc/papr_scm: Use FORM2 associativity details
  2021-06-17  7:34 [PATCH v3 0/8] Add support for FORM2 associativity Aneesh Kumar K.V
                   ` (6 preceding siblings ...)
  2021-06-17  7:34 ` [PATCH v3 7/8] powerpc/pseries: Add support for FORM2 associativity Aneesh Kumar K.V
@ 2021-06-17  7:34 ` Aneesh Kumar K.V
  7 siblings, 0 replies; 9+ messages in thread
From: Aneesh Kumar K.V @ 2021-06-17  7:34 UTC (permalink / raw)
  To: linuxppc-dev, mpe
  Cc: Nathan Lynch, David Gibson, Daniel Henrique Barboza, nvdimm,
	dan.j.williams, Aneesh Kumar K.V

FORM2 introduce a concept of secondary domain which is identical to the
concept of FORM1 primary domain. Use secondary domain as the numa node
when using persistent memory device. With DAX kmem kernel can use the
pimary domainID introduced in Form2. More details can be found in
patch "powerpc/pseries: Add support for FORM2 associativity"

Cc: nvdimm@lists.linux.dev
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 arch/powerpc/mm/numa.c                    | 28 +++++++++++++++++++++++
 arch/powerpc/platforms/pseries/papr_scm.c | 26 +++++++++++++--------
 arch/powerpc/platforms/pseries/pseries.h  |  1 +
 3 files changed, 45 insertions(+), 10 deletions(-)

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 5a7d94960fb7..cd3ae7ff77ac 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -265,6 +265,34 @@ static int associativity_to_nid(const __be32 *associativity)
 	return nid;
 }
 
+int get_primary_and_secondary_domain(struct device_node *node, int *primary, int *secondary)
+{
+	int secondary_index;
+	const __be32 *associativity;
+
+	if (!numa_enabled) {
+		*primary = NUMA_NO_NODE;
+		*secondary = NUMA_NO_NODE;
+		return 0;
+	}
+
+	associativity = of_get_associativity(node);
+	if (!associativity)
+		return -ENODEV;
+
+	if (of_read_number(associativity, 1) >= primary_domain_index) {
+		*primary = of_read_number(&associativity[primary_domain_index], 1);
+		secondary_index = of_read_number(&distance_ref_points[1], 1);
+		*secondary = of_read_number(&associativity[secondary_index], 1);
+	}
+	if (*primary == 0xffff || *primary >= nr_node_ids)
+		*primary = NUMA_NO_NODE;
+
+	if (*secondary == 0xffff || *secondary >= nr_node_ids)
+		*secondary = NUMA_NO_NODE;
+	return 0;
+}
+
 /* Returns the nid associated with the given device tree node,
  * or -1 if not found.
  */
diff --git a/arch/powerpc/platforms/pseries/papr_scm.c b/arch/powerpc/platforms/pseries/papr_scm.c
index ef26fe40efb0..9bf2f1f3ddc5 100644
--- a/arch/powerpc/platforms/pseries/papr_scm.c
+++ b/arch/powerpc/platforms/pseries/papr_scm.c
@@ -18,6 +18,7 @@
 #include <asm/plpar_wrappers.h>
 #include <asm/papr_pdsm.h>
 #include <asm/mce.h>
+#include "pseries.h"
 
 #define BIND_ANY_ADDR (~0ul)
 
@@ -88,6 +89,8 @@ struct papr_scm_perf_stats {
 struct papr_scm_priv {
 	struct platform_device *pdev;
 	struct device_node *dn;
+	int numa_node;
+	int target_node;
 	uint32_t drc_index;
 	uint64_t blocks;
 	uint64_t block_size;
@@ -923,7 +926,6 @@ static int papr_scm_nvdimm_init(struct papr_scm_priv *p)
 	struct nd_mapping_desc mapping;
 	struct nd_region_desc ndr_desc;
 	unsigned long dimm_flags;
-	int target_nid, online_nid;
 	ssize_t stat_size;
 
 	p->bus_desc.ndctl = papr_scm_ndctl;
@@ -974,10 +976,8 @@ static int papr_scm_nvdimm_init(struct papr_scm_priv *p)
 	mapping.size = p->blocks * p->block_size; // XXX: potential overflow?
 
 	memset(&ndr_desc, 0, sizeof(ndr_desc));
-	target_nid = dev_to_node(&p->pdev->dev);
-	online_nid = numa_map_to_online_node(target_nid);
-	ndr_desc.numa_node = online_nid;
-	ndr_desc.target_node = target_nid;
+	ndr_desc.numa_node = p->numa_node;
+	ndr_desc.target_node = p->target_node;
 	ndr_desc.res = &p->res;
 	ndr_desc.of_node = p->dn;
 	ndr_desc.provider_data = p;
@@ -1001,9 +1001,6 @@ static int papr_scm_nvdimm_init(struct papr_scm_priv *p)
 				ndr_desc.res, p->dn);
 		goto err;
 	}
-	if (target_nid != online_nid)
-		dev_info(dev, "Region registered with target node %d and online node %d",
-			 target_nid, online_nid);
 
 	mutex_lock(&papr_ndr_lock);
 	list_add_tail(&p->region_list, &papr_nd_regions);
@@ -1096,7 +1093,7 @@ static int papr_scm_probe(struct platform_device *pdev)
 	struct papr_scm_priv *p;
 	const char *uuid_str;
 	u64 uuid[2];
-	int rc;
+	int rc, numa_node;
 
 	/* check we have all the required DT properties */
 	if (of_property_read_u32(dn, "ibm,my-drc-index", &drc_index)) {
@@ -1119,11 +1116,20 @@ static int papr_scm_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-
 	p = kzalloc(sizeof(*p), GFP_KERNEL);
 	if (!p)
 		return -ENOMEM;
 
+	if (get_primary_and_secondary_domain(dn, &p->target_node, &numa_node)) {
+		dev_err(&pdev->dev, "%pOF: missing NUMA attributes!\n", dn);
+		rc = -ENODEV;
+		goto err;
+	}
+	p->numa_node = numa_map_to_online_node(numa_node);
+	if (numa_node != p->numa_node)
+		dev_info(&pdev->dev, "Region registered with online node %d and device tree node %d",
+			 p->numa_node, numa_node);
+
 	/* Initialize the dimm mutex */
 	mutex_init(&p->health_mutex);
 
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index 663a0859cf13..9c2a1fc9ded1 100644
--- a/arch/powerpc/platforms/pseries/pseries.h
+++ b/arch/powerpc/platforms/pseries/pseries.h
@@ -114,4 +114,5 @@ void pseries_setup_security_mitigations(void);
 void pseries_lpar_read_hblkrm_characteristics(void);
 
 void update_numa_distance(struct device_node *node);
+int get_primary_and_secondary_domain(struct device_node *node, int *primary, int *secondary);
 #endif /* _PSERIES_PSERIES_H */
-- 
2.31.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2021-06-17  7:40 UTC | newest]

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2021-06-17  7:34 [PATCH v3 0/8] Add support for FORM2 associativity Aneesh Kumar K.V
2021-06-17  7:34 ` [PATCH v3 1/8] powerpc/pseries: rename min_common_depth to primary_domain_index Aneesh Kumar K.V
2021-06-17  7:34 ` [PATCH v3 2/8] powerpc/pseries: rename distance_ref_points_depth to max_associativity_domain_index Aneesh Kumar K.V
2021-06-17  7:34 ` [PATCH v3 3/8] powerpc/pseries: Rename TYPE1_AFFINITY to FORM1_AFFINITY Aneesh Kumar K.V
2021-06-17  7:34 ` [PATCH v3 4/8] powerpc/pseries: Consolidate DLPAR NUMA distance update Aneesh Kumar K.V
2021-06-17  7:34 ` [PATCH v3 5/8] powerpc/pseries: Consolidate NUMA distance update during boot Aneesh Kumar K.V
2021-06-17  7:34 ` [PATCH v3 6/8] powerpc/pseries: Add a helper for form1 cpu distance Aneesh Kumar K.V
2021-06-17  7:34 ` [PATCH v3 7/8] powerpc/pseries: Add support for FORM2 associativity Aneesh Kumar K.V
2021-06-17  7:34 ` [PATCH v3 8/8] powerpc/papr_scm: Use FORM2 associativity details Aneesh Kumar K.V

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