Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * pSeries NUMA support |
| 3 | * |
| 4 | * Copyright (C) 2002 Anton Blanchard <anton@au.ibm.com>, IBM |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | #include <linux/threads.h> |
| 12 | #include <linux/bootmem.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/mm.h> |
| 15 | #include <linux/mmzone.h> |
Paul Gortmaker | 4b16f8e | 2011-07-22 18:24:23 -0400 | [diff] [blame] | 16 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/nodemask.h> |
| 18 | #include <linux/cpu.h> |
| 19 | #include <linux/notifier.h> |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 20 | #include <linux/memblock.h> |
Michael Ellerman | 6df1646 | 2008-02-14 11:37:49 +1100 | [diff] [blame] | 21 | #include <linux/of.h> |
Dave Hansen | 06eccea | 2009-02-12 12:36:04 +0000 | [diff] [blame] | 22 | #include <linux/pfn.h> |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 23 | #include <linux/cpuset.h> |
| 24 | #include <linux/node.h> |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 25 | #include <linux/stop_machine.h> |
Nathan Fontenot | e04fa61 | 2013-04-24 06:07:39 +0000 | [diff] [blame] | 26 | #include <linux/proc_fs.h> |
| 27 | #include <linux/seq_file.h> |
| 28 | #include <linux/uaccess.h> |
Linus Torvalds | 191a712 | 2013-04-29 19:14:20 -0700 | [diff] [blame] | 29 | #include <linux/slab.h> |
Robert Jennings | 3be7db6 | 2013-07-24 20:13:21 -0500 | [diff] [blame] | 30 | #include <asm/cputhreads.h> |
Anton Blanchard | 45fb6ce | 2005-11-11 14:22:35 +1100 | [diff] [blame] | 31 | #include <asm/sparsemem.h> |
David S. Miller | d9b2b2a | 2008-02-13 16:56:49 -0800 | [diff] [blame] | 32 | #include <asm/prom.h> |
Paul Mackerras | 2249ca9 | 2005-11-07 13:18:13 +1100 | [diff] [blame] | 33 | #include <asm/smp.h> |
Srivatsa S. Bhat | d4edc5b | 2013-12-30 17:05:34 +0530 | [diff] [blame] | 34 | #include <asm/cputhreads.h> |
| 35 | #include <asm/topology.h> |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 36 | #include <asm/firmware.h> |
| 37 | #include <asm/paca.h> |
Jesse Larrew | 39bf990 | 2010-12-17 22:07:47 +0000 | [diff] [blame] | 38 | #include <asm/hvcall.h> |
David Howells | ae3a197e | 2012-03-28 18:30:02 +0100 | [diff] [blame] | 39 | #include <asm/setup.h> |
Jesse Larrew | 176bbf1 | 2013-04-24 06:03:48 +0000 | [diff] [blame] | 40 | #include <asm/vdso.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | static int numa_enabled = 1; |
| 43 | |
Balbir Singh | 1daa6d0 | 2008-02-01 15:57:31 +1100 | [diff] [blame] | 44 | static char *cmdline __initdata; |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | static int numa_debug; |
| 47 | #define dbg(args...) if (numa_debug) { printk(KERN_INFO args); } |
| 48 | |
Anton Blanchard | 45fb6ce | 2005-11-11 14:22:35 +1100 | [diff] [blame] | 49 | int numa_cpu_lookup_table[NR_CPUS]; |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 50 | cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | struct pglist_data *node_data[MAX_NUMNODES]; |
Anton Blanchard | 45fb6ce | 2005-11-11 14:22:35 +1100 | [diff] [blame] | 52 | |
| 53 | EXPORT_SYMBOL(numa_cpu_lookup_table); |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 54 | EXPORT_SYMBOL(node_to_cpumask_map); |
Anton Blanchard | 45fb6ce | 2005-11-11 14:22:35 +1100 | [diff] [blame] | 55 | EXPORT_SYMBOL(node_data); |
| 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | static int min_common_depth; |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 58 | static int n_mem_addr_cells, n_mem_size_cells; |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 59 | static int form1_affinity; |
| 60 | |
| 61 | #define MAX_DISTANCE_REF_POINTS 4 |
| 62 | static int distance_ref_points_depth; |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 63 | static const __be32 *distance_ref_points; |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 64 | static int distance_lookup_table[MAX_NUMNODES][MAX_DISTANCE_REF_POINTS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 66 | /* |
| 67 | * Allocate node_to_cpumask_map based on number of available nodes |
| 68 | * Requires node_possible_map to be valid. |
| 69 | * |
Wanlong Gao | 9512938 | 2012-01-12 17:20:09 -0800 | [diff] [blame] | 70 | * Note: cpumask_of_node() is not valid until after this is done. |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 71 | */ |
| 72 | static void __init setup_node_to_cpumask_map(void) |
| 73 | { |
Cody P Schafer | f9d531b | 2013-04-29 15:08:03 -0700 | [diff] [blame] | 74 | unsigned int node; |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 75 | |
| 76 | /* setup nr_node_ids if not done yet */ |
Cody P Schafer | f9d531b | 2013-04-29 15:08:03 -0700 | [diff] [blame] | 77 | if (nr_node_ids == MAX_NUMNODES) |
| 78 | setup_nr_node_ids(); |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 79 | |
| 80 | /* allocate the map */ |
| 81 | for (node = 0; node < nr_node_ids; node++) |
| 82 | alloc_bootmem_cpumask_var(&node_to_cpumask_map[node]); |
| 83 | |
| 84 | /* cpumask_of_node() will now work */ |
| 85 | dbg("Node to cpumask map for %d nodes\n", nr_node_ids); |
| 86 | } |
| 87 | |
Stephen Rothwell | 55671f3 | 2013-03-25 18:44:44 +0000 | [diff] [blame] | 88 | static int __init fake_numa_create_new_node(unsigned long end_pfn, |
Balbir Singh | 1daa6d0 | 2008-02-01 15:57:31 +1100 | [diff] [blame] | 89 | unsigned int *nid) |
| 90 | { |
| 91 | unsigned long long mem; |
| 92 | char *p = cmdline; |
| 93 | static unsigned int fake_nid; |
| 94 | static unsigned long long curr_boundary; |
| 95 | |
| 96 | /* |
| 97 | * Modify node id, iff we started creating NUMA nodes |
| 98 | * We want to continue from where we left of the last time |
| 99 | */ |
| 100 | if (fake_nid) |
| 101 | *nid = fake_nid; |
| 102 | /* |
| 103 | * In case there are no more arguments to parse, the |
| 104 | * node_id should be the same as the last fake node id |
| 105 | * (we've handled this above). |
| 106 | */ |
| 107 | if (!p) |
| 108 | return 0; |
| 109 | |
| 110 | mem = memparse(p, &p); |
| 111 | if (!mem) |
| 112 | return 0; |
| 113 | |
| 114 | if (mem < curr_boundary) |
| 115 | return 0; |
| 116 | |
| 117 | curr_boundary = mem; |
| 118 | |
| 119 | if ((end_pfn << PAGE_SHIFT) > mem) { |
| 120 | /* |
| 121 | * Skip commas and spaces |
| 122 | */ |
| 123 | while (*p == ',' || *p == ' ' || *p == '\t') |
| 124 | p++; |
| 125 | |
| 126 | cmdline = p; |
| 127 | fake_nid++; |
| 128 | *nid = fake_nid; |
| 129 | dbg("created new fake_node with id %d\n", fake_nid); |
| 130 | return 1; |
| 131 | } |
| 132 | return 0; |
| 133 | } |
| 134 | |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 135 | /* |
Tejun Heo | 5dfe866 | 2011-07-14 09:46:10 +0200 | [diff] [blame] | 136 | * get_node_active_region - Return active region containing pfn |
Jon Tollefson | e817037 | 2008-10-16 18:59:43 +0000 | [diff] [blame] | 137 | * Active range returned is empty if none found. |
Tejun Heo | 5dfe866 | 2011-07-14 09:46:10 +0200 | [diff] [blame] | 138 | * @pfn: The page to return the region for |
| 139 | * @node_ar: Returned set to the active region containing @pfn |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 140 | */ |
Tejun Heo | 5dfe866 | 2011-07-14 09:46:10 +0200 | [diff] [blame] | 141 | static void __init get_node_active_region(unsigned long pfn, |
| 142 | struct node_active_region *node_ar) |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 143 | { |
Tejun Heo | 5dfe866 | 2011-07-14 09:46:10 +0200 | [diff] [blame] | 144 | unsigned long start_pfn, end_pfn; |
| 145 | int i, nid; |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 146 | |
Tejun Heo | 5dfe866 | 2011-07-14 09:46:10 +0200 | [diff] [blame] | 147 | for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, &nid) { |
| 148 | if (pfn >= start_pfn && pfn < end_pfn) { |
| 149 | node_ar->nid = nid; |
| 150 | node_ar->start_pfn = start_pfn; |
| 151 | node_ar->end_pfn = end_pfn; |
| 152 | break; |
| 153 | } |
| 154 | } |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 155 | } |
| 156 | |
Srivatsa S. Bhat | d4edc5b | 2013-12-30 17:05:34 +0530 | [diff] [blame] | 157 | static void reset_numa_cpu_lookup_table(void) |
| 158 | { |
| 159 | unsigned int cpu; |
| 160 | |
| 161 | for_each_possible_cpu(cpu) |
| 162 | numa_cpu_lookup_table[cpu] = -1; |
| 163 | } |
| 164 | |
| 165 | static void update_numa_cpu_lookup_table(unsigned int cpu, int node) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | { |
| 167 | numa_cpu_lookup_table[cpu] = node; |
Srivatsa S. Bhat | d4edc5b | 2013-12-30 17:05:34 +0530 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | static void map_cpu_to_node(int cpu, int node) |
| 171 | { |
| 172 | update_numa_cpu_lookup_table(cpu, node); |
Anton Blanchard | 45fb6ce | 2005-11-11 14:22:35 +1100 | [diff] [blame] | 173 | |
Nathan Lynch | bf4b85b | 2006-03-20 18:34:45 -0600 | [diff] [blame] | 174 | dbg("adding cpu %d to node %d\n", cpu, node); |
| 175 | |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 176 | if (!(cpumask_test_cpu(cpu, node_to_cpumask_map[node]))) |
| 177 | cpumask_set_cpu(cpu, node_to_cpumask_map[node]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | } |
| 179 | |
Jesse Larrew | 39bf990 | 2010-12-17 22:07:47 +0000 | [diff] [blame] | 180 | #if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_PPC_SPLPAR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | static void unmap_cpu_from_node(unsigned long cpu) |
| 182 | { |
| 183 | int node = numa_cpu_lookup_table[cpu]; |
| 184 | |
| 185 | dbg("removing cpu %lu from node %d\n", cpu, node); |
| 186 | |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 187 | if (cpumask_test_cpu(cpu, node_to_cpumask_map[node])) { |
Anton Blanchard | 429f4d8 | 2011-01-29 12:37:16 +0000 | [diff] [blame] | 188 | cpumask_clear_cpu(cpu, node_to_cpumask_map[node]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | } else { |
| 190 | printk(KERN_ERR "WARNING: cpu %lu not found in node %d\n", |
| 191 | cpu, node); |
| 192 | } |
| 193 | } |
Jesse Larrew | 39bf990 | 2010-12-17 22:07:47 +0000 | [diff] [blame] | 194 | #endif /* CONFIG_HOTPLUG_CPU || CONFIG_PPC_SPLPAR */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | /* must hold reference to node during call */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 197 | static const __be32 *of_get_associativity(struct device_node *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | { |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 199 | return of_get_property(dev, "ibm,associativity", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | } |
| 201 | |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 202 | /* |
| 203 | * Returns the property linux,drconf-usable-memory if |
| 204 | * it exists (the property exists only in kexec/kdump kernels, |
| 205 | * added by kexec-tools) |
| 206 | */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 207 | static const __be32 *of_get_usable_memory(struct device_node *memory) |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 208 | { |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 209 | const __be32 *prop; |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 210 | u32 len; |
| 211 | prop = of_get_property(memory, "linux,drconf-usable-memory", &len); |
| 212 | if (!prop || len < sizeof(unsigned int)) |
Robert Jennings | ec32dd6 | 2013-10-28 09:20:50 -0500 | [diff] [blame] | 213 | return NULL; |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 214 | return prop; |
| 215 | } |
| 216 | |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 217 | int __node_distance(int a, int b) |
| 218 | { |
| 219 | int i; |
| 220 | int distance = LOCAL_DISTANCE; |
| 221 | |
| 222 | if (!form1_affinity) |
Vaidyanathan Srinivasan | 7122bee | 2013-03-22 05:49:35 +0000 | [diff] [blame] | 223 | return ((a == b) ? LOCAL_DISTANCE : REMOTE_DISTANCE); |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 224 | |
| 225 | for (i = 0; i < distance_ref_points_depth; i++) { |
| 226 | if (distance_lookup_table[a][i] == distance_lookup_table[b][i]) |
| 227 | break; |
| 228 | |
| 229 | /* Double the distance for each NUMA level */ |
| 230 | distance *= 2; |
| 231 | } |
| 232 | |
| 233 | return distance; |
| 234 | } |
Mike Qiu | 12c743e | 2014-04-18 15:07:14 -0700 | [diff] [blame] | 235 | EXPORT_SYMBOL(__node_distance); |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 236 | |
| 237 | static void initialize_distance_lookup_table(int nid, |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 238 | const __be32 *associativity) |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 239 | { |
| 240 | int i; |
| 241 | |
| 242 | if (!form1_affinity) |
| 243 | return; |
| 244 | |
| 245 | for (i = 0; i < distance_ref_points_depth; i++) { |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 246 | const __be32 *entry; |
| 247 | |
| 248 | entry = &associativity[be32_to_cpu(distance_ref_points[i])]; |
| 249 | distance_lookup_table[nid][i] = of_read_number(entry, 1); |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 250 | } |
| 251 | } |
| 252 | |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 253 | /* Returns nid in the range [0..MAX_NUMNODES-1], or -1 if no useful numa |
| 254 | * info is found. |
| 255 | */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 256 | static int associativity_to_nid(const __be32 *associativity) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | { |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 258 | int nid = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
| 260 | if (min_common_depth == -1) |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 261 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 263 | if (of_read_number(associativity, 1) >= min_common_depth) |
| 264 | nid = of_read_number(&associativity[min_common_depth], 1); |
Nathan Lynch | bc16a75 | 2006-03-20 18:36:15 -0600 | [diff] [blame] | 265 | |
| 266 | /* POWER4 LPAR uses 0xffff as invalid node */ |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 267 | if (nid == 0xffff || nid >= MAX_NUMNODES) |
| 268 | nid = -1; |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 269 | |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 270 | if (nid > 0 && |
| 271 | of_read_number(associativity, 1) >= distance_ref_points_depth) |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 272 | initialize_distance_lookup_table(nid, associativity); |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 273 | |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 274 | out: |
Nathan Lynch | cf950b7 | 2006-03-20 18:35:45 -0600 | [diff] [blame] | 275 | return nid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 278 | /* Returns the nid associated with the given device tree node, |
| 279 | * or -1 if not found. |
| 280 | */ |
| 281 | static int of_node_to_nid_single(struct device_node *device) |
| 282 | { |
| 283 | int nid = -1; |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 284 | const __be32 *tmp; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 285 | |
| 286 | tmp = of_get_associativity(device); |
| 287 | if (tmp) |
| 288 | nid = associativity_to_nid(tmp); |
| 289 | return nid; |
| 290 | } |
| 291 | |
Jeremy Kerr | 953039c | 2006-05-01 12:16:12 -0700 | [diff] [blame] | 292 | /* Walk the device tree upwards, looking for an associativity id */ |
| 293 | int of_node_to_nid(struct device_node *device) |
| 294 | { |
| 295 | struct device_node *tmp; |
| 296 | int nid = -1; |
| 297 | |
| 298 | of_node_get(device); |
| 299 | while (device) { |
| 300 | nid = of_node_to_nid_single(device); |
| 301 | if (nid != -1) |
| 302 | break; |
| 303 | |
| 304 | tmp = device; |
| 305 | device = of_get_parent(tmp); |
| 306 | of_node_put(tmp); |
| 307 | } |
| 308 | of_node_put(device); |
| 309 | |
| 310 | return nid; |
| 311 | } |
| 312 | EXPORT_SYMBOL_GPL(of_node_to_nid); |
| 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | static int __init find_min_common_depth(void) |
| 315 | { |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 316 | int depth; |
Michael Ellerman | e70606e | 2011-04-10 20:42:05 +0000 | [diff] [blame] | 317 | struct device_node *root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
Dipankar Sarma | 1c8ee73 | 2011-10-28 04:25:32 +0000 | [diff] [blame] | 319 | if (firmware_has_feature(FW_FEATURE_OPAL)) |
| 320 | root = of_find_node_by_path("/ibm,opal"); |
| 321 | else |
| 322 | root = of_find_node_by_path("/rtas"); |
Michael Ellerman | e70606e | 2011-04-10 20:42:05 +0000 | [diff] [blame] | 323 | if (!root) |
| 324 | root = of_find_node_by_path("/"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | /* |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 327 | * This property is a set of 32-bit integers, each representing |
| 328 | * an index into the ibm,associativity nodes. |
| 329 | * |
| 330 | * With form 0 affinity the first integer is for an SMP configuration |
| 331 | * (should be all 0's) and the second is for a normal NUMA |
| 332 | * configuration. We have only one level of NUMA. |
| 333 | * |
| 334 | * With form 1 affinity the first integer is the most significant |
| 335 | * NUMA boundary and the following are progressively less significant |
| 336 | * boundaries. There can be more than one level of NUMA. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | */ |
Michael Ellerman | e70606e | 2011-04-10 20:42:05 +0000 | [diff] [blame] | 338 | distance_ref_points = of_get_property(root, |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 339 | "ibm,associativity-reference-points", |
| 340 | &distance_ref_points_depth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 342 | if (!distance_ref_points) { |
| 343 | dbg("NUMA: ibm,associativity-reference-points not found.\n"); |
| 344 | goto err; |
| 345 | } |
| 346 | |
| 347 | distance_ref_points_depth /= sizeof(int); |
| 348 | |
Nathan Fontenot | 8002b0c | 2013-04-24 05:58:23 +0000 | [diff] [blame] | 349 | if (firmware_has_feature(FW_FEATURE_OPAL) || |
| 350 | firmware_has_feature(FW_FEATURE_TYPE1_AFFINITY)) { |
| 351 | dbg("Using form 1 affinity\n"); |
Dipankar Sarma | 1c8ee73 | 2011-10-28 04:25:32 +0000 | [diff] [blame] | 352 | form1_affinity = 1; |
Anton Blanchard | 4b83c33 | 2010-04-07 15:33:44 +0000 | [diff] [blame] | 353 | } |
| 354 | |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 355 | if (form1_affinity) { |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 356 | depth = of_read_number(distance_ref_points, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } else { |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 358 | if (distance_ref_points_depth < 2) { |
| 359 | printk(KERN_WARNING "NUMA: " |
| 360 | "short ibm,associativity-reference-points\n"); |
| 361 | goto err; |
| 362 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 364 | depth = of_read_number(&distance_ref_points[1], 1); |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | /* |
| 368 | * Warn and cap if the hardware supports more than |
| 369 | * MAX_DISTANCE_REF_POINTS domains. |
| 370 | */ |
| 371 | if (distance_ref_points_depth > MAX_DISTANCE_REF_POINTS) { |
| 372 | printk(KERN_WARNING "NUMA: distance array capped at " |
| 373 | "%d entries\n", MAX_DISTANCE_REF_POINTS); |
| 374 | distance_ref_points_depth = MAX_DISTANCE_REF_POINTS; |
| 375 | } |
| 376 | |
Michael Ellerman | e70606e | 2011-04-10 20:42:05 +0000 | [diff] [blame] | 377 | of_node_put(root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | return depth; |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 379 | |
| 380 | err: |
Michael Ellerman | e70606e | 2011-04-10 20:42:05 +0000 | [diff] [blame] | 381 | of_node_put(root); |
Anton Blanchard | 41eab6f | 2010-05-16 20:22:31 +0000 | [diff] [blame] | 382 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } |
| 384 | |
Mike Kravetz | 84c9fdd | 2005-11-30 13:47:23 -0800 | [diff] [blame] | 385 | static void __init get_n_mem_cells(int *n_addr_cells, int *n_size_cells) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | { |
| 387 | struct device_node *memory = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | |
| 389 | memory = of_find_node_by_type(memory, "memory"); |
Paul Mackerras | 54c2331 | 2005-12-05 15:50:39 +1100 | [diff] [blame] | 390 | if (!memory) |
Mike Kravetz | 84c9fdd | 2005-11-30 13:47:23 -0800 | [diff] [blame] | 391 | panic("numa.c: No memory nodes found!"); |
Paul Mackerras | 54c2331 | 2005-12-05 15:50:39 +1100 | [diff] [blame] | 392 | |
Stephen Rothwell | a8bda5d | 2007-04-03 10:56:50 +1000 | [diff] [blame] | 393 | *n_addr_cells = of_n_addr_cells(memory); |
Stephen Rothwell | 9213fee | 2007-04-03 10:57:48 +1000 | [diff] [blame] | 394 | *n_size_cells = of_n_size_cells(memory); |
Mike Kravetz | 84c9fdd | 2005-11-30 13:47:23 -0800 | [diff] [blame] | 395 | of_node_put(memory); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | } |
| 397 | |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 398 | static unsigned long read_n_cells(int n, const __be32 **buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | { |
| 400 | unsigned long result = 0; |
| 401 | |
| 402 | while (n--) { |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 403 | result = (result << 32) | of_read_number(*buf, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | (*buf)++; |
| 405 | } |
| 406 | return result; |
| 407 | } |
| 408 | |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 409 | /* |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 410 | * Read the next memblock list entry from the ibm,dynamic-memory property |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 411 | * and return the information in the provided of_drconf_cell structure. |
| 412 | */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 413 | static void read_drconf_cell(struct of_drconf_cell *drmem, const __be32 **cellp) |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 414 | { |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 415 | const __be32 *cp; |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 416 | |
| 417 | drmem->base_addr = read_n_cells(n_mem_addr_cells, cellp); |
| 418 | |
| 419 | cp = *cellp; |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 420 | drmem->drc_index = of_read_number(cp, 1); |
| 421 | drmem->reserved = of_read_number(&cp[1], 1); |
| 422 | drmem->aa_index = of_read_number(&cp[2], 1); |
| 423 | drmem->flags = of_read_number(&cp[3], 1); |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 424 | |
| 425 | *cellp = cp + 4; |
| 426 | } |
| 427 | |
| 428 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 429 | * Retrieve and validate the ibm,dynamic-memory property of the device tree. |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 430 | * |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 431 | * The layout of the ibm,dynamic-memory property is a number N of memblock |
| 432 | * list entries followed by N memblock list entries. Each memblock list entry |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 433 | * contains information as laid out in the of_drconf_cell struct above. |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 434 | */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 435 | static int of_get_drconf_memory(struct device_node *memory, const __be32 **dm) |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 436 | { |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 437 | const __be32 *prop; |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 438 | u32 len, entries; |
| 439 | |
| 440 | prop = of_get_property(memory, "ibm,dynamic-memory", &len); |
| 441 | if (!prop || len < sizeof(unsigned int)) |
| 442 | return 0; |
| 443 | |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 444 | entries = of_read_number(prop++, 1); |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 445 | |
| 446 | /* Now that we know the number of entries, revalidate the size |
| 447 | * of the property read in to ensure we have everything |
| 448 | */ |
| 449 | if (len < (entries * (n_mem_addr_cells + 4) + 1) * sizeof(unsigned int)) |
| 450 | return 0; |
| 451 | |
| 452 | *dm = prop; |
| 453 | return entries; |
| 454 | } |
| 455 | |
| 456 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 457 | * Retrieve and validate the ibm,lmb-size property for drconf memory |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 458 | * from the device tree. |
| 459 | */ |
Benjamin Herrenschmidt | 3fdfd99 | 2010-07-23 10:35:52 +1000 | [diff] [blame] | 460 | static u64 of_get_lmb_size(struct device_node *memory) |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 461 | { |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 462 | const __be32 *prop; |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 463 | u32 len; |
| 464 | |
Benjamin Herrenschmidt | 3fdfd99 | 2010-07-23 10:35:52 +1000 | [diff] [blame] | 465 | prop = of_get_property(memory, "ibm,lmb-size", &len); |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 466 | if (!prop || len < sizeof(unsigned int)) |
| 467 | return 0; |
| 468 | |
| 469 | return read_n_cells(n_mem_size_cells, &prop); |
| 470 | } |
| 471 | |
| 472 | struct assoc_arrays { |
| 473 | u32 n_arrays; |
| 474 | u32 array_sz; |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 475 | const __be32 *arrays; |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 476 | }; |
| 477 | |
| 478 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 479 | * Retrieve and validate the list of associativity arrays for drconf |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 480 | * memory from the ibm,associativity-lookup-arrays property of the |
| 481 | * device tree.. |
| 482 | * |
| 483 | * The layout of the ibm,associativity-lookup-arrays property is a number N |
| 484 | * indicating the number of associativity arrays, followed by a number M |
| 485 | * indicating the size of each associativity array, followed by a list |
| 486 | * of N associativity arrays. |
| 487 | */ |
| 488 | static int of_get_assoc_arrays(struct device_node *memory, |
| 489 | struct assoc_arrays *aa) |
| 490 | { |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 491 | const __be32 *prop; |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 492 | u32 len; |
| 493 | |
| 494 | prop = of_get_property(memory, "ibm,associativity-lookup-arrays", &len); |
| 495 | if (!prop || len < 2 * sizeof(unsigned int)) |
| 496 | return -1; |
| 497 | |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 498 | aa->n_arrays = of_read_number(prop++, 1); |
| 499 | aa->array_sz = of_read_number(prop++, 1); |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 500 | |
Justin P. Mattock | 42b2aa8 | 2011-11-28 20:31:00 -0800 | [diff] [blame] | 501 | /* Now that we know the number of arrays and size of each array, |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 502 | * revalidate the size of the property read in. |
| 503 | */ |
| 504 | if (len < (aa->n_arrays * aa->array_sz + 2) * sizeof(unsigned int)) |
| 505 | return -1; |
| 506 | |
| 507 | aa->arrays = prop; |
| 508 | return 0; |
| 509 | } |
| 510 | |
| 511 | /* |
| 512 | * This is like of_node_to_nid_single() for memory represented in the |
| 513 | * ibm,dynamic-reconfiguration-memory node. |
| 514 | */ |
| 515 | static int of_drconf_to_nid_single(struct of_drconf_cell *drmem, |
| 516 | struct assoc_arrays *aa) |
| 517 | { |
| 518 | int default_nid = 0; |
| 519 | int nid = default_nid; |
| 520 | int index; |
| 521 | |
| 522 | if (min_common_depth > 0 && min_common_depth <= aa->array_sz && |
| 523 | !(drmem->flags & DRCONF_MEM_AI_INVALID) && |
| 524 | drmem->aa_index < aa->n_arrays) { |
| 525 | index = drmem->aa_index * aa->array_sz + min_common_depth - 1; |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 526 | nid = of_read_number(&aa->arrays[index], 1); |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 527 | |
| 528 | if (nid == 0xffff || nid >= MAX_NUMNODES) |
| 529 | nid = default_nid; |
| 530 | } |
| 531 | |
| 532 | return nid; |
| 533 | } |
| 534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | /* |
| 536 | * Figure out to which domain a cpu belongs and stick it there. |
| 537 | * Return the id of the domain used. |
| 538 | */ |
Paul Gortmaker | 061d19f | 2013-06-24 15:30:09 -0400 | [diff] [blame] | 539 | static int numa_setup_cpu(unsigned long lcpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | { |
Srivatsa S. Bhat | d4edc5b | 2013-12-30 17:05:34 +0530 | [diff] [blame] | 541 | int nid; |
| 542 | struct device_node *cpu; |
| 543 | |
| 544 | /* |
| 545 | * If a valid cpu-to-node mapping is already available, use it |
| 546 | * directly instead of querying the firmware, since it represents |
| 547 | * the most recent mapping notified to us by the platform (eg: VPHN). |
| 548 | */ |
| 549 | if ((nid = numa_cpu_lookup_table[lcpu]) >= 0) { |
| 550 | map_cpu_to_node(lcpu, nid); |
| 551 | return nid; |
| 552 | } |
| 553 | |
| 554 | cpu = of_get_cpu_node(lcpu, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
| 556 | if (!cpu) { |
| 557 | WARN_ON(1); |
Srivatsa S. Bhat | d4edc5b | 2013-12-30 17:05:34 +0530 | [diff] [blame] | 558 | nid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | goto out; |
| 560 | } |
| 561 | |
Jeremy Kerr | 953039c | 2006-05-01 12:16:12 -0700 | [diff] [blame] | 562 | nid = of_node_to_nid_single(cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 564 | if (nid < 0 || !node_online(nid)) |
H Hartley Sweeten | 72c3368 | 2010-03-05 13:42:43 -0800 | [diff] [blame] | 565 | nid = first_online_node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | out: |
Nathan Lynch | cf950b7 | 2006-03-20 18:35:45 -0600 | [diff] [blame] | 567 | map_cpu_to_node(lcpu, nid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
| 569 | of_node_put(cpu); |
| 570 | |
Nathan Lynch | cf950b7 | 2006-03-20 18:35:45 -0600 | [diff] [blame] | 571 | return nid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
| 573 | |
Srivatsa S. Bhat | 68fb18aa | 2013-12-30 17:06:04 +0530 | [diff] [blame] | 574 | static void verify_cpu_node_mapping(int cpu, int node) |
| 575 | { |
| 576 | int base, sibling, i; |
| 577 | |
| 578 | /* Verify that all the threads in the core belong to the same node */ |
| 579 | base = cpu_first_thread_sibling(cpu); |
| 580 | |
| 581 | for (i = 0; i < threads_per_core; i++) { |
| 582 | sibling = base + i; |
| 583 | |
| 584 | if (sibling == cpu || cpu_is_offline(sibling)) |
| 585 | continue; |
| 586 | |
| 587 | if (cpu_to_node(sibling) != node) { |
| 588 | WARN(1, "CPU thread siblings %d and %d don't belong" |
| 589 | " to the same node!\n", cpu, sibling); |
| 590 | break; |
| 591 | } |
| 592 | } |
| 593 | } |
| 594 | |
Paul Gortmaker | 061d19f | 2013-06-24 15:30:09 -0400 | [diff] [blame] | 595 | static int cpu_numa_callback(struct notifier_block *nfb, unsigned long action, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | void *hcpu) |
| 597 | { |
| 598 | unsigned long lcpu = (unsigned long)hcpu; |
Srivatsa S. Bhat | 68fb18aa | 2013-12-30 17:06:04 +0530 | [diff] [blame] | 599 | int ret = NOTIFY_DONE, nid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | |
| 601 | switch (action) { |
| 602 | case CPU_UP_PREPARE: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 603 | case CPU_UP_PREPARE_FROZEN: |
Srivatsa S. Bhat | 68fb18aa | 2013-12-30 17:06:04 +0530 | [diff] [blame] | 604 | nid = numa_setup_cpu(lcpu); |
| 605 | verify_cpu_node_mapping((int)lcpu, nid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | ret = NOTIFY_OK; |
| 607 | break; |
| 608 | #ifdef CONFIG_HOTPLUG_CPU |
| 609 | case CPU_DEAD: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 610 | case CPU_DEAD_FROZEN: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | case CPU_UP_CANCELED: |
Rafael J. Wysocki | 8bb7844 | 2007-05-09 02:35:10 -0700 | [diff] [blame] | 612 | case CPU_UP_CANCELED_FROZEN: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | unmap_cpu_from_node(lcpu); |
| 614 | break; |
| 615 | ret = NOTIFY_OK; |
| 616 | #endif |
| 617 | } |
| 618 | return ret; |
| 619 | } |
| 620 | |
| 621 | /* |
| 622 | * Check and possibly modify a memory region to enforce the memory limit. |
| 623 | * |
| 624 | * Returns the size the region should have to enforce the memory limit. |
| 625 | * This will either be the original value of size, a truncated value, |
| 626 | * or zero. If the returned value of size is 0 the region should be |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 627 | * discarded as it lies wholly above the memory limit. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | */ |
Anton Blanchard | 45fb6ce | 2005-11-11 14:22:35 +1100 | [diff] [blame] | 629 | static unsigned long __init numa_enforce_memory_limit(unsigned long start, |
| 630 | unsigned long size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | { |
| 632 | /* |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 633 | * We use memblock_end_of_DRAM() in here instead of memory_limit because |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | * we've already adjusted it for the limit and it takes care of |
Milton Miller | fe55249 | 2008-10-20 15:37:04 +0000 | [diff] [blame] | 635 | * having memory holes below the limit. Also, in the case of |
| 636 | * iommu_is_off, memory_limit is not set but is implicitly enforced. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 639 | if (start + size <= memblock_end_of_DRAM()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | return size; |
| 641 | |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 642 | if (start >= memblock_end_of_DRAM()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | return 0; |
| 644 | |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 645 | return memblock_end_of_DRAM() - start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | } |
| 647 | |
Paul Mackerras | 0204568 | 2006-11-29 22:27:42 +1100 | [diff] [blame] | 648 | /* |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 649 | * Reads the counter for a given entry in |
| 650 | * linux,drconf-usable-memory property |
| 651 | */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 652 | static inline int __init read_usm_ranges(const __be32 **usm) |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 653 | { |
| 654 | /* |
Benjamin Herrenschmidt | 3fdfd99 | 2010-07-23 10:35:52 +1000 | [diff] [blame] | 655 | * For each lmb in ibm,dynamic-memory a corresponding |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 656 | * entry in linux,drconf-usable-memory property contains |
| 657 | * a counter followed by that many (base, size) duple. |
| 658 | * read the counter from linux,drconf-usable-memory |
| 659 | */ |
| 660 | return read_n_cells(n_mem_size_cells, usm); |
| 661 | } |
| 662 | |
| 663 | /* |
Paul Mackerras | 0204568 | 2006-11-29 22:27:42 +1100 | [diff] [blame] | 664 | * Extract NUMA information from the ibm,dynamic-reconfiguration-memory |
| 665 | * node. This assumes n_mem_{addr,size}_cells have been set. |
| 666 | */ |
| 667 | static void __init parse_drconf_memory(struct device_node *memory) |
| 668 | { |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 669 | const __be32 *uninitialized_var(dm), *usm; |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 670 | unsigned int n, rc, ranges, is_kexec_kdump = 0; |
Benjamin Herrenschmidt | 3fdfd99 | 2010-07-23 10:35:52 +1000 | [diff] [blame] | 671 | unsigned long lmb_size, base, size, sz; |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 672 | int nid; |
Benjamin Herrenschmidt | aa709f3 | 2012-07-05 16:30:33 +0000 | [diff] [blame] | 673 | struct assoc_arrays aa = { .arrays = NULL }; |
Paul Mackerras | 0204568 | 2006-11-29 22:27:42 +1100 | [diff] [blame] | 674 | |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 675 | n = of_get_drconf_memory(memory, &dm); |
| 676 | if (!n) |
Paul Mackerras | 0204568 | 2006-11-29 22:27:42 +1100 | [diff] [blame] | 677 | return; |
| 678 | |
Benjamin Herrenschmidt | 3fdfd99 | 2010-07-23 10:35:52 +1000 | [diff] [blame] | 679 | lmb_size = of_get_lmb_size(memory); |
| 680 | if (!lmb_size) |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 681 | return; |
| 682 | |
| 683 | rc = of_get_assoc_arrays(memory, &aa); |
| 684 | if (rc) |
Paul Mackerras | 0204568 | 2006-11-29 22:27:42 +1100 | [diff] [blame] | 685 | return; |
| 686 | |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 687 | /* check if this is a kexec/kdump kernel */ |
| 688 | usm = of_get_usable_memory(memory); |
| 689 | if (usm != NULL) |
| 690 | is_kexec_kdump = 1; |
| 691 | |
Paul Mackerras | 0204568 | 2006-11-29 22:27:42 +1100 | [diff] [blame] | 692 | for (; n != 0; --n) { |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 693 | struct of_drconf_cell drmem; |
Balbir Singh | 1daa6d0 | 2008-02-01 15:57:31 +1100 | [diff] [blame] | 694 | |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 695 | read_drconf_cell(&drmem, &dm); |
| 696 | |
| 697 | /* skip this block if the reserved bit is set in flags (0x80) |
| 698 | or if the block is not assigned to this partition (0x8) */ |
| 699 | if ((drmem.flags & DRCONF_MEM_RESERVED) |
| 700 | || !(drmem.flags & DRCONF_MEM_ASSIGNED)) |
| 701 | continue; |
| 702 | |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 703 | base = drmem.base_addr; |
Benjamin Herrenschmidt | 3fdfd99 | 2010-07-23 10:35:52 +1000 | [diff] [blame] | 704 | size = lmb_size; |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 705 | ranges = 1; |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 706 | |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 707 | if (is_kexec_kdump) { |
| 708 | ranges = read_usm_ranges(&usm); |
| 709 | if (!ranges) /* there are no (base, size) duple */ |
| 710 | continue; |
| 711 | } |
| 712 | do { |
| 713 | if (is_kexec_kdump) { |
| 714 | base = read_n_cells(n_mem_addr_cells, &usm); |
| 715 | size = read_n_cells(n_mem_size_cells, &usm); |
| 716 | } |
| 717 | nid = of_drconf_to_nid_single(&drmem, &aa); |
| 718 | fake_numa_create_new_node( |
| 719 | ((base + size) >> PAGE_SHIFT), |
Nathan Fontenot | 8342681 | 2008-07-03 13:35:54 +1000 | [diff] [blame] | 720 | &nid); |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 721 | node_set_online(nid); |
| 722 | sz = numa_enforce_memory_limit(base, size); |
| 723 | if (sz) |
Tang Chen | e7e8de5 | 2014-01-21 15:49:26 -0800 | [diff] [blame] | 724 | memblock_set_node(base, sz, |
| 725 | &memblock.memory, nid); |
Chandru | cf00085 | 2008-08-30 00:28:16 +1000 | [diff] [blame] | 726 | } while (--ranges); |
Paul Mackerras | 0204568 | 2006-11-29 22:27:42 +1100 | [diff] [blame] | 727 | } |
| 728 | } |
| 729 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | static int __init parse_numa_properties(void) |
| 731 | { |
Anton Blanchard | 94db7c5 | 2011-08-10 20:44:22 +0000 | [diff] [blame] | 732 | struct device_node *memory; |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 733 | int default_nid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | unsigned long i; |
| 735 | |
| 736 | if (numa_enabled == 0) { |
| 737 | printk(KERN_WARNING "NUMA disabled by user\n"); |
| 738 | return -1; |
| 739 | } |
| 740 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | min_common_depth = find_min_common_depth(); |
| 742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | if (min_common_depth < 0) |
| 744 | return min_common_depth; |
| 745 | |
Nathan Lynch | bf4b85b | 2006-03-20 18:34:45 -0600 | [diff] [blame] | 746 | dbg("NUMA associativity depth for CPU/Memory: %d\n", min_common_depth); |
| 747 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | /* |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 749 | * Even though we connect cpus to numa domains later in SMP |
| 750 | * init, we need to know the node ids now. This is because |
| 751 | * each node to be onlined must have NODE_DATA etc backing it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | */ |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 753 | for_each_present_cpu(i) { |
Anton Blanchard | dfbe93a | 2011-08-10 20:44:23 +0000 | [diff] [blame] | 754 | struct device_node *cpu; |
Nathan Lynch | cf950b7 | 2006-03-20 18:35:45 -0600 | [diff] [blame] | 755 | int nid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | |
Milton Miller | 8b16cd2 | 2009-01-08 02:19:45 +0000 | [diff] [blame] | 757 | cpu = of_get_cpu_node(i, NULL); |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 758 | BUG_ON(!cpu); |
Jeremy Kerr | 953039c | 2006-05-01 12:16:12 -0700 | [diff] [blame] | 759 | nid = of_node_to_nid_single(cpu); |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 760 | of_node_put(cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 762 | /* |
| 763 | * Don't fall back to default_nid yet -- we will plug |
| 764 | * cpus into nodes once the memory scan has discovered |
| 765 | * the topology. |
| 766 | */ |
| 767 | if (nid < 0) |
| 768 | continue; |
| 769 | node_set_online(nid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | } |
| 771 | |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 772 | get_n_mem_cells(&n_mem_addr_cells, &n_mem_size_cells); |
Anton Blanchard | 94db7c5 | 2011-08-10 20:44:22 +0000 | [diff] [blame] | 773 | |
| 774 | for_each_node_by_type(memory, "memory") { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | unsigned long start; |
| 776 | unsigned long size; |
Nathan Lynch | cf950b7 | 2006-03-20 18:35:45 -0600 | [diff] [blame] | 777 | int nid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | int ranges; |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 779 | const __be32 *memcell_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | unsigned int len; |
| 781 | |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 782 | memcell_buf = of_get_property(memory, |
Michael Ellerman | ba75948 | 2005-12-04 18:39:55 +1100 | [diff] [blame] | 783 | "linux,usable-memory", &len); |
| 784 | if (!memcell_buf || len <= 0) |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 785 | memcell_buf = of_get_property(memory, "reg", &len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | if (!memcell_buf || len <= 0) |
| 787 | continue; |
| 788 | |
Benjamin Herrenschmidt | cc5d018 | 2005-12-13 18:01:21 +1100 | [diff] [blame] | 789 | /* ranges in cell */ |
| 790 | ranges = (len >> 2) / (n_mem_addr_cells + n_mem_size_cells); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | new_range: |
| 792 | /* these are order-sensitive, and modify the buffer pointer */ |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 793 | start = read_n_cells(n_mem_addr_cells, &memcell_buf); |
| 794 | size = read_n_cells(n_mem_size_cells, &memcell_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 796 | /* |
| 797 | * Assumption: either all memory nodes or none will |
| 798 | * have associativity properties. If none, then |
| 799 | * everything goes to default_nid. |
| 800 | */ |
Jeremy Kerr | 953039c | 2006-05-01 12:16:12 -0700 | [diff] [blame] | 801 | nid = of_node_to_nid_single(memory); |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 802 | if (nid < 0) |
| 803 | nid = default_nid; |
Balbir Singh | 1daa6d0 | 2008-02-01 15:57:31 +1100 | [diff] [blame] | 804 | |
| 805 | fake_numa_create_new_node(((start + size) >> PAGE_SHIFT), &nid); |
Nathan Lynch | 482ec7c | 2006-03-20 18:36:45 -0600 | [diff] [blame] | 806 | node_set_online(nid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
Anton Blanchard | 45fb6ce | 2005-11-11 14:22:35 +1100 | [diff] [blame] | 808 | if (!(size = numa_enforce_memory_limit(start, size))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | if (--ranges) |
| 810 | goto new_range; |
| 811 | else |
| 812 | continue; |
| 813 | } |
| 814 | |
Tang Chen | e7e8de5 | 2014-01-21 15:49:26 -0800 | [diff] [blame] | 815 | memblock_set_node(start, size, &memblock.memory, nid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
| 817 | if (--ranges) |
| 818 | goto new_range; |
| 819 | } |
| 820 | |
Paul Mackerras | 0204568 | 2006-11-29 22:27:42 +1100 | [diff] [blame] | 821 | /* |
Anton Blanchard | dfbe93a | 2011-08-10 20:44:23 +0000 | [diff] [blame] | 822 | * Now do the same thing for each MEMBLOCK listed in the |
| 823 | * ibm,dynamic-memory property in the |
| 824 | * ibm,dynamic-reconfiguration-memory node. |
Paul Mackerras | 0204568 | 2006-11-29 22:27:42 +1100 | [diff] [blame] | 825 | */ |
| 826 | memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory"); |
| 827 | if (memory) |
| 828 | parse_drconf_memory(memory); |
| 829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | return 0; |
| 831 | } |
| 832 | |
| 833 | static void __init setup_nonnuma(void) |
| 834 | { |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 835 | unsigned long top_of_ram = memblock_end_of_DRAM(); |
| 836 | unsigned long total_ram = memblock_phys_mem_size(); |
Mel Gorman | c67c3cb | 2006-09-27 01:49:49 -0700 | [diff] [blame] | 837 | unsigned long start_pfn, end_pfn; |
Benjamin Herrenschmidt | 28be707 | 2010-08-04 13:43:53 +1000 | [diff] [blame] | 838 | unsigned int nid = 0; |
| 839 | struct memblock_region *reg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | |
Olof Johansson | e110b28 | 2006-04-12 15:25:01 -0500 | [diff] [blame] | 841 | printk(KERN_DEBUG "Top of RAM: 0x%lx, Total RAM: 0x%lx\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | top_of_ram, total_ram); |
Olof Johansson | e110b28 | 2006-04-12 15:25:01 -0500 | [diff] [blame] | 843 | printk(KERN_DEBUG "Memory hole size: %ldMB\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | (top_of_ram - total_ram) >> 20); |
| 845 | |
Benjamin Herrenschmidt | 28be707 | 2010-08-04 13:43:53 +1000 | [diff] [blame] | 846 | for_each_memblock(memory, reg) { |
Yinghai Lu | c7fc2de | 2010-10-12 14:07:09 -0700 | [diff] [blame] | 847 | start_pfn = memblock_region_memory_base_pfn(reg); |
| 848 | end_pfn = memblock_region_memory_end_pfn(reg); |
Balbir Singh | 1daa6d0 | 2008-02-01 15:57:31 +1100 | [diff] [blame] | 849 | |
| 850 | fake_numa_create_new_node(end_pfn, &nid); |
Tejun Heo | 1d7cfe1 | 2011-12-08 10:22:08 -0800 | [diff] [blame] | 851 | memblock_set_node(PFN_PHYS(start_pfn), |
Tang Chen | e7e8de5 | 2014-01-21 15:49:26 -0800 | [diff] [blame] | 852 | PFN_PHYS(end_pfn - start_pfn), |
| 853 | &memblock.memory, nid); |
Balbir Singh | 1daa6d0 | 2008-02-01 15:57:31 +1100 | [diff] [blame] | 854 | node_set_online(nid); |
Mel Gorman | c67c3cb | 2006-09-27 01:49:49 -0700 | [diff] [blame] | 855 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | } |
| 857 | |
Anton Blanchard | 4b703a2 | 2005-12-13 06:56:47 +1100 | [diff] [blame] | 858 | void __init dump_numa_cpu_topology(void) |
| 859 | { |
| 860 | unsigned int node; |
| 861 | unsigned int cpu, count; |
| 862 | |
| 863 | if (min_common_depth == -1 || !numa_enabled) |
| 864 | return; |
| 865 | |
| 866 | for_each_online_node(node) { |
Olof Johansson | e110b28 | 2006-04-12 15:25:01 -0500 | [diff] [blame] | 867 | printk(KERN_DEBUG "Node %d CPUs:", node); |
Anton Blanchard | 4b703a2 | 2005-12-13 06:56:47 +1100 | [diff] [blame] | 868 | |
| 869 | count = 0; |
| 870 | /* |
| 871 | * If we used a CPU iterator here we would miss printing |
| 872 | * the holes in the cpumap. |
| 873 | */ |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 874 | for (cpu = 0; cpu < nr_cpu_ids; cpu++) { |
| 875 | if (cpumask_test_cpu(cpu, |
| 876 | node_to_cpumask_map[node])) { |
Anton Blanchard | 4b703a2 | 2005-12-13 06:56:47 +1100 | [diff] [blame] | 877 | if (count == 0) |
| 878 | printk(" %u", cpu); |
| 879 | ++count; |
| 880 | } else { |
| 881 | if (count > 1) |
| 882 | printk("-%u", cpu - 1); |
| 883 | count = 0; |
| 884 | } |
| 885 | } |
| 886 | |
| 887 | if (count > 1) |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 888 | printk("-%u", nr_cpu_ids - 1); |
Anton Blanchard | 4b703a2 | 2005-12-13 06:56:47 +1100 | [diff] [blame] | 889 | printk("\n"); |
| 890 | } |
| 891 | } |
| 892 | |
| 893 | static void __init dump_numa_memory_topology(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | { |
| 895 | unsigned int node; |
| 896 | unsigned int count; |
| 897 | |
| 898 | if (min_common_depth == -1 || !numa_enabled) |
| 899 | return; |
| 900 | |
| 901 | for_each_online_node(node) { |
| 902 | unsigned long i; |
| 903 | |
Olof Johansson | e110b28 | 2006-04-12 15:25:01 -0500 | [diff] [blame] | 904 | printk(KERN_DEBUG "Node %d Memory:", node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | |
| 906 | count = 0; |
| 907 | |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 908 | for (i = 0; i < memblock_end_of_DRAM(); |
Anton Blanchard | 45fb6ce | 2005-11-11 14:22:35 +1100 | [diff] [blame] | 909 | i += (1 << SECTION_SIZE_BITS)) { |
| 910 | if (early_pfn_to_nid(i >> PAGE_SHIFT) == node) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | if (count == 0) |
| 912 | printk(" 0x%lx", i); |
| 913 | ++count; |
| 914 | } else { |
| 915 | if (count > 0) |
| 916 | printk("-0x%lx", i); |
| 917 | count = 0; |
| 918 | } |
| 919 | } |
| 920 | |
| 921 | if (count > 0) |
| 922 | printk("-0x%lx", i); |
| 923 | printk("\n"); |
| 924 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | } |
| 926 | |
| 927 | /* |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 928 | * Allocate some memory, satisfying the memblock or bootmem allocator where |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | * required. nid is the preferred node and end is the physical address of |
| 930 | * the highest address in the node. |
| 931 | * |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 932 | * Returns the virtual address of the memory. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | */ |
Dave Hansen | 893473d | 2008-12-09 08:21:36 +0000 | [diff] [blame] | 934 | static void __init *careful_zallocation(int nid, unsigned long size, |
Anton Blanchard | 45fb6ce | 2005-11-11 14:22:35 +1100 | [diff] [blame] | 935 | unsigned long align, |
| 936 | unsigned long end_pfn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | { |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 938 | void *ret; |
Anton Blanchard | 45fb6ce | 2005-11-11 14:22:35 +1100 | [diff] [blame] | 939 | int new_nid; |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 940 | unsigned long ret_paddr; |
| 941 | |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 942 | ret_paddr = __memblock_alloc_base(size, align, end_pfn << PAGE_SHIFT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
| 944 | /* retry over all memory */ |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 945 | if (!ret_paddr) |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 946 | ret_paddr = __memblock_alloc_base(size, align, memblock_end_of_DRAM()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 948 | if (!ret_paddr) |
Dave Hansen | 5d21ea2 | 2008-12-09 08:21:33 +0000 | [diff] [blame] | 949 | panic("numa.c: cannot allocate %lu bytes for node %d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | size, nid); |
| 951 | |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 952 | ret = __va(ret_paddr); |
| 953 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | /* |
Dave Hansen | c555e520 | 2008-12-09 08:21:32 +0000 | [diff] [blame] | 955 | * We initialize the nodes in numeric order: 0, 1, 2... |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 956 | * and hand over control from the MEMBLOCK allocator to the |
Dave Hansen | c555e520 | 2008-12-09 08:21:32 +0000 | [diff] [blame] | 957 | * bootmem allocator. If this function is called for |
| 958 | * node 5, then we know that all nodes <5 are using the |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 959 | * bootmem allocator instead of the MEMBLOCK allocator. |
Dave Hansen | c555e520 | 2008-12-09 08:21:32 +0000 | [diff] [blame] | 960 | * |
| 961 | * So, check the nid from which this allocation came |
| 962 | * and double check to see if we need to use bootmem |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 963 | * instead of the MEMBLOCK. We don't free the MEMBLOCK memory |
Dave Hansen | c555e520 | 2008-12-09 08:21:32 +0000 | [diff] [blame] | 964 | * since it would be useless. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | */ |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 966 | new_nid = early_pfn_to_nid(ret_paddr >> PAGE_SHIFT); |
Anton Blanchard | 45fb6ce | 2005-11-11 14:22:35 +1100 | [diff] [blame] | 967 | if (new_nid < nid) { |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 968 | ret = __alloc_bootmem_node(NODE_DATA(new_nid), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | size, align, 0); |
| 970 | |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 971 | dbg("alloc_bootmem %p %lx\n", ret, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | } |
| 973 | |
Dave Hansen | 893473d | 2008-12-09 08:21:36 +0000 | [diff] [blame] | 974 | memset(ret, 0, size); |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 975 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | } |
| 977 | |
Paul Gortmaker | 061d19f | 2013-06-24 15:30:09 -0400 | [diff] [blame] | 978 | static struct notifier_block ppc64_numa_nb = { |
Chandra Seetharaman | 74b85f3 | 2006-06-27 02:54:09 -0700 | [diff] [blame] | 979 | .notifier_call = cpu_numa_callback, |
| 980 | .priority = 1 /* Must run before sched domains notifier. */ |
| 981 | }; |
| 982 | |
David Rientjes | 28e86bd | 2011-12-08 12:33:29 +0000 | [diff] [blame] | 983 | static void __init mark_reserved_regions_for_nid(int nid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | { |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 985 | struct pglist_data *node = NODE_DATA(nid); |
Benjamin Herrenschmidt | 28be707 | 2010-08-04 13:43:53 +1000 | [diff] [blame] | 986 | struct memblock_region *reg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | |
Benjamin Herrenschmidt | 28be707 | 2010-08-04 13:43:53 +1000 | [diff] [blame] | 988 | for_each_memblock(reserved, reg) { |
| 989 | unsigned long physbase = reg->base; |
| 990 | unsigned long size = reg->size; |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 991 | unsigned long start_pfn = physbase >> PAGE_SHIFT; |
Dave Hansen | 06eccea | 2009-02-12 12:36:04 +0000 | [diff] [blame] | 992 | unsigned long end_pfn = PFN_UP(physbase + size); |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 993 | struct node_active_region node_ar; |
Xishi Qiu | 6408068 | 2013-11-12 15:07:17 -0800 | [diff] [blame] | 994 | unsigned long node_end_pfn = pgdat_end_pfn(node); |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 995 | |
| 996 | /* |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 997 | * Check to make sure that this memblock.reserved area is |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 998 | * within the bounds of the node that we care about. |
| 999 | * Checking the nid of the start and end points is not |
| 1000 | * sufficient because the reserved area could span the |
| 1001 | * entire node. |
| 1002 | */ |
| 1003 | if (end_pfn <= node->node_start_pfn || |
| 1004 | start_pfn >= node_end_pfn) |
| 1005 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 1007 | get_node_active_region(start_pfn, &node_ar); |
Jon Tollefson | e817037 | 2008-10-16 18:59:43 +0000 | [diff] [blame] | 1008 | while (start_pfn < end_pfn && |
| 1009 | node_ar.start_pfn < node_ar.end_pfn) { |
| 1010 | unsigned long reserve_size = size; |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 1011 | /* |
| 1012 | * if reserved region extends past active region |
| 1013 | * then trim size to active region |
| 1014 | */ |
| 1015 | if (end_pfn > node_ar.end_pfn) |
Jon Tollefson | e817037 | 2008-10-16 18:59:43 +0000 | [diff] [blame] | 1016 | reserve_size = (node_ar.end_pfn << PAGE_SHIFT) |
Dave Hansen | 06eccea | 2009-02-12 12:36:04 +0000 | [diff] [blame] | 1017 | - physbase; |
Dave Hansen | a4c74dd | 2008-12-11 08:36:06 +0000 | [diff] [blame] | 1018 | /* |
| 1019 | * Only worry about *this* node, others may not |
| 1020 | * yet have valid NODE_DATA(). |
| 1021 | */ |
| 1022 | if (node_ar.nid == nid) { |
| 1023 | dbg("reserve_bootmem %lx %lx nid=%d\n", |
| 1024 | physbase, reserve_size, node_ar.nid); |
| 1025 | reserve_bootmem_node(NODE_DATA(node_ar.nid), |
| 1026 | physbase, reserve_size, |
| 1027 | BOOTMEM_DEFAULT); |
| 1028 | } |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 1029 | /* |
| 1030 | * if reserved region is contained in the active region |
| 1031 | * then done. |
| 1032 | */ |
| 1033 | if (end_pfn <= node_ar.end_pfn) |
| 1034 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 1036 | /* |
| 1037 | * reserved region extends past the active region |
| 1038 | * get next active region that contains this |
| 1039 | * reserved region |
| 1040 | */ |
| 1041 | start_pfn = node_ar.end_pfn; |
| 1042 | physbase = start_pfn << PAGE_SHIFT; |
Jon Tollefson | e817037 | 2008-10-16 18:59:43 +0000 | [diff] [blame] | 1043 | size = size - reserve_size; |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 1044 | get_node_active_region(start_pfn, &node_ar); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | } |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1047 | } |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 1048 | |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1049 | |
| 1050 | void __init do_init_bootmem(void) |
| 1051 | { |
| 1052 | int nid; |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1053 | |
| 1054 | min_low_pfn = 0; |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1055 | max_low_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT; |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1056 | max_pfn = max_low_pfn; |
| 1057 | |
| 1058 | if (parse_numa_properties()) |
| 1059 | setup_nonnuma(); |
| 1060 | else |
| 1061 | dump_numa_memory_topology(); |
| 1062 | |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1063 | for_each_online_node(nid) { |
| 1064 | unsigned long start_pfn, end_pfn; |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 1065 | void *bootmem_vaddr; |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1066 | unsigned long bootmap_pages; |
| 1067 | |
| 1068 | get_pfn_range_for_nid(nid, &start_pfn, &end_pfn); |
| 1069 | |
| 1070 | /* |
| 1071 | * Allocate the node structure node local if possible |
| 1072 | * |
| 1073 | * Be careful moving this around, as it relies on all |
| 1074 | * previous nodes' bootmem to be initialized and have |
| 1075 | * all reserved areas marked. |
| 1076 | */ |
Dave Hansen | 893473d | 2008-12-09 08:21:36 +0000 | [diff] [blame] | 1077 | NODE_DATA(nid) = careful_zallocation(nid, |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1078 | sizeof(struct pglist_data), |
| 1079 | SMP_CACHE_BYTES, end_pfn); |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1080 | |
| 1081 | dbg("node %d\n", nid); |
| 1082 | dbg("NODE_DATA() = %p\n", NODE_DATA(nid)); |
| 1083 | |
| 1084 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; |
| 1085 | NODE_DATA(nid)->node_start_pfn = start_pfn; |
| 1086 | NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; |
| 1087 | |
| 1088 | if (NODE_DATA(nid)->node_spanned_pages == 0) |
| 1089 | continue; |
| 1090 | |
| 1091 | dbg("start_paddr = %lx\n", start_pfn << PAGE_SHIFT); |
| 1092 | dbg("end_paddr = %lx\n", end_pfn << PAGE_SHIFT); |
| 1093 | |
| 1094 | bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn); |
Dave Hansen | 893473d | 2008-12-09 08:21:36 +0000 | [diff] [blame] | 1095 | bootmem_vaddr = careful_zallocation(nid, |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1096 | bootmap_pages << PAGE_SHIFT, |
| 1097 | PAGE_SIZE, end_pfn); |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1098 | |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 1099 | dbg("bootmap_vaddr = %p\n", bootmem_vaddr); |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1100 | |
Dave Hansen | 0be210f | 2008-12-09 08:21:35 +0000 | [diff] [blame] | 1101 | init_bootmem_node(NODE_DATA(nid), |
| 1102 | __pa(bootmem_vaddr) >> PAGE_SHIFT, |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1103 | start_pfn, end_pfn); |
| 1104 | |
| 1105 | free_bootmem_with_active_regions(nid, end_pfn); |
| 1106 | /* |
| 1107 | * Be very careful about moving this around. Future |
Dave Hansen | 893473d | 2008-12-09 08:21:36 +0000 | [diff] [blame] | 1108 | * calls to careful_zallocation() depend on this getting |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1109 | * done correctly. |
| 1110 | */ |
| 1111 | mark_reserved_regions_for_nid(nid); |
Jon Tollefson | 8f64e1f | 2008-10-09 10:18:40 +0000 | [diff] [blame] | 1112 | sparse_memory_present_with_active_regions(nid); |
Dave Hansen | 4a61866 | 2008-11-24 12:02:35 +0000 | [diff] [blame] | 1113 | } |
Benjamin Herrenschmidt | d3f6204 | 2009-06-02 21:16:38 +0000 | [diff] [blame] | 1114 | |
| 1115 | init_bootmem_done = 1; |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 1116 | |
| 1117 | /* |
| 1118 | * Now bootmem is initialised we can create the node to cpumask |
| 1119 | * lookup tables and setup the cpu callback to populate them. |
| 1120 | */ |
| 1121 | setup_node_to_cpumask_map(); |
| 1122 | |
Srivatsa S. Bhat | d4edc5b | 2013-12-30 17:05:34 +0530 | [diff] [blame] | 1123 | reset_numa_cpu_lookup_table(); |
Anton Blanchard | 25863de | 2010-04-26 15:32:43 +0000 | [diff] [blame] | 1124 | register_cpu_notifier(&ppc64_numa_nb); |
| 1125 | cpu_numa_callback(&ppc64_numa_nb, CPU_UP_PREPARE, |
| 1126 | (void *)(unsigned long)boot_cpuid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | void __init paging_init(void) |
| 1130 | { |
Mel Gorman | 6391af1 | 2006-10-11 01:20:39 -0700 | [diff] [blame] | 1131 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
| 1132 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1133 | max_zone_pfns[ZONE_DMA] = memblock_end_of_DRAM() >> PAGE_SHIFT; |
Mel Gorman | c67c3cb | 2006-09-27 01:49:49 -0700 | [diff] [blame] | 1134 | free_area_init_nodes(max_zone_pfns); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | } |
| 1136 | |
| 1137 | static int __init early_numa(char *p) |
| 1138 | { |
| 1139 | if (!p) |
| 1140 | return 0; |
| 1141 | |
| 1142 | if (strstr(p, "off")) |
| 1143 | numa_enabled = 0; |
| 1144 | |
| 1145 | if (strstr(p, "debug")) |
| 1146 | numa_debug = 1; |
| 1147 | |
Balbir Singh | 1daa6d0 | 2008-02-01 15:57:31 +1100 | [diff] [blame] | 1148 | p = strstr(p, "fake="); |
| 1149 | if (p) |
| 1150 | cmdline = p + strlen("fake="); |
| 1151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | return 0; |
| 1153 | } |
| 1154 | early_param("numa", early_numa); |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1155 | |
| 1156 | #ifdef CONFIG_MEMORY_HOTPLUG |
| 1157 | /* |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1158 | * Find the node associated with a hot added memory section for |
| 1159 | * memory represented in the device tree by the property |
| 1160 | * ibm,dynamic-reconfiguration-memory/ibm,dynamic-memory. |
Nathan Fontenot | 0db9360 | 2008-07-03 13:25:08 +1000 | [diff] [blame] | 1161 | */ |
| 1162 | static int hot_add_drconf_scn_to_nid(struct device_node *memory, |
| 1163 | unsigned long scn_addr) |
| 1164 | { |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1165 | const __be32 *dm; |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1166 | unsigned int drconf_cell_cnt, rc; |
Benjamin Herrenschmidt | 3fdfd99 | 2010-07-23 10:35:52 +1000 | [diff] [blame] | 1167 | unsigned long lmb_size; |
Nathan Fontenot | 0db9360 | 2008-07-03 13:25:08 +1000 | [diff] [blame] | 1168 | struct assoc_arrays aa; |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1169 | int nid = -1; |
Nathan Fontenot | 0db9360 | 2008-07-03 13:25:08 +1000 | [diff] [blame] | 1170 | |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1171 | drconf_cell_cnt = of_get_drconf_memory(memory, &dm); |
| 1172 | if (!drconf_cell_cnt) |
| 1173 | return -1; |
Nathan Fontenot | 0db9360 | 2008-07-03 13:25:08 +1000 | [diff] [blame] | 1174 | |
Benjamin Herrenschmidt | 3fdfd99 | 2010-07-23 10:35:52 +1000 | [diff] [blame] | 1175 | lmb_size = of_get_lmb_size(memory); |
| 1176 | if (!lmb_size) |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1177 | return -1; |
Nathan Fontenot | 0db9360 | 2008-07-03 13:25:08 +1000 | [diff] [blame] | 1178 | |
| 1179 | rc = of_get_assoc_arrays(memory, &aa); |
| 1180 | if (rc) |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1181 | return -1; |
Nathan Fontenot | 0db9360 | 2008-07-03 13:25:08 +1000 | [diff] [blame] | 1182 | |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1183 | for (; drconf_cell_cnt != 0; --drconf_cell_cnt) { |
Nathan Fontenot | 0db9360 | 2008-07-03 13:25:08 +1000 | [diff] [blame] | 1184 | struct of_drconf_cell drmem; |
| 1185 | |
| 1186 | read_drconf_cell(&drmem, &dm); |
| 1187 | |
| 1188 | /* skip this block if it is reserved or not assigned to |
| 1189 | * this partition */ |
| 1190 | if ((drmem.flags & DRCONF_MEM_RESERVED) |
| 1191 | || !(drmem.flags & DRCONF_MEM_ASSIGNED)) |
| 1192 | continue; |
| 1193 | |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1194 | if ((scn_addr < drmem.base_addr) |
Benjamin Herrenschmidt | 3fdfd99 | 2010-07-23 10:35:52 +1000 | [diff] [blame] | 1195 | || (scn_addr >= (drmem.base_addr + lmb_size))) |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1196 | continue; |
Nathan Fontenot | 0db9360 | 2008-07-03 13:25:08 +1000 | [diff] [blame] | 1197 | |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1198 | nid = of_drconf_to_nid_single(&drmem, &aa); |
| 1199 | break; |
Nathan Fontenot | 0db9360 | 2008-07-03 13:25:08 +1000 | [diff] [blame] | 1200 | } |
| 1201 | |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1202 | return nid; |
Nathan Fontenot | 0db9360 | 2008-07-03 13:25:08 +1000 | [diff] [blame] | 1203 | } |
| 1204 | |
| 1205 | /* |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1206 | * Find the node associated with a hot added memory section for memory |
| 1207 | * represented in the device tree as a node (i.e. memory@XXXX) for |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1208 | * each memblock. |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1209 | */ |
Robert Jennings | ec32dd6 | 2013-10-28 09:20:50 -0500 | [diff] [blame] | 1210 | static int hot_add_node_scn_to_nid(unsigned long scn_addr) |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1211 | { |
Anton Blanchard | 94db7c5 | 2011-08-10 20:44:22 +0000 | [diff] [blame] | 1212 | struct device_node *memory; |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1213 | int nid = -1; |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1214 | |
Anton Blanchard | 94db7c5 | 2011-08-10 20:44:22 +0000 | [diff] [blame] | 1215 | for_each_node_by_type(memory, "memory") { |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1216 | unsigned long start, size; |
Mike Kravetz | b226e46 | 2005-12-16 14:30:35 -0800 | [diff] [blame] | 1217 | int ranges; |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1218 | const __be32 *memcell_buf; |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1219 | unsigned int len; |
| 1220 | |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 1221 | memcell_buf = of_get_property(memory, "reg", &len); |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1222 | if (!memcell_buf || len <= 0) |
| 1223 | continue; |
| 1224 | |
Benjamin Herrenschmidt | cc5d018 | 2005-12-13 18:01:21 +1100 | [diff] [blame] | 1225 | /* ranges in cell */ |
| 1226 | ranges = (len >> 2) / (n_mem_addr_cells + n_mem_size_cells); |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1227 | |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1228 | while (ranges--) { |
| 1229 | start = read_n_cells(n_mem_addr_cells, &memcell_buf); |
| 1230 | size = read_n_cells(n_mem_size_cells, &memcell_buf); |
| 1231 | |
| 1232 | if ((scn_addr < start) || (scn_addr >= (start + size))) |
| 1233 | continue; |
| 1234 | |
| 1235 | nid = of_node_to_nid_single(memory); |
| 1236 | break; |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1237 | } |
| 1238 | |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1239 | if (nid >= 0) |
| 1240 | break; |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1241 | } |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1242 | |
Anton Blanchard | 6083184 | 2011-08-10 20:44:21 +0000 | [diff] [blame] | 1243 | of_node_put(memory); |
| 1244 | |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1245 | return nid; |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1246 | } |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1247 | |
| 1248 | /* |
| 1249 | * Find the node associated with a hot added memory section. Section |
Yinghai Lu | 95f72d1 | 2010-07-12 14:36:09 +1000 | [diff] [blame] | 1250 | * corresponds to a SPARSEMEM section, not an MEMBLOCK. It is assumed that |
| 1251 | * sections are fully contained within a single MEMBLOCK. |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1252 | */ |
| 1253 | int hot_add_scn_to_nid(unsigned long scn_addr) |
| 1254 | { |
| 1255 | struct device_node *memory = NULL; |
| 1256 | int nid, found = 0; |
| 1257 | |
| 1258 | if (!numa_enabled || (min_common_depth < 0)) |
H Hartley Sweeten | 72c3368 | 2010-03-05 13:42:43 -0800 | [diff] [blame] | 1259 | return first_online_node; |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1260 | |
| 1261 | memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory"); |
| 1262 | if (memory) { |
| 1263 | nid = hot_add_drconf_scn_to_nid(memory, scn_addr); |
| 1264 | of_node_put(memory); |
| 1265 | } else { |
| 1266 | nid = hot_add_node_scn_to_nid(scn_addr); |
| 1267 | } |
| 1268 | |
| 1269 | if (nid < 0 || !node_online(nid)) |
H Hartley Sweeten | 72c3368 | 2010-03-05 13:42:43 -0800 | [diff] [blame] | 1270 | nid = first_online_node; |
Nathan Fontenot | 0f16ef7 | 2009-02-17 08:08:30 +0000 | [diff] [blame] | 1271 | |
| 1272 | if (NODE_DATA(nid)->node_spanned_pages) |
| 1273 | return nid; |
| 1274 | |
| 1275 | for_each_online_node(nid) { |
| 1276 | if (NODE_DATA(nid)->node_spanned_pages) { |
| 1277 | found = 1; |
| 1278 | break; |
| 1279 | } |
| 1280 | } |
| 1281 | |
| 1282 | BUG_ON(!found); |
| 1283 | return nid; |
| 1284 | } |
| 1285 | |
Nishanth Aravamudan | cd34206 | 2010-10-26 17:35:12 +0000 | [diff] [blame] | 1286 | static u64 hot_add_drconf_memory_max(void) |
| 1287 | { |
| 1288 | struct device_node *memory = NULL; |
| 1289 | unsigned int drconf_cell_cnt = 0; |
| 1290 | u64 lmb_size = 0; |
Robert Jennings | ec32dd6 | 2013-10-28 09:20:50 -0500 | [diff] [blame] | 1291 | const __be32 *dm = NULL; |
Nishanth Aravamudan | cd34206 | 2010-10-26 17:35:12 +0000 | [diff] [blame] | 1292 | |
| 1293 | memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory"); |
| 1294 | if (memory) { |
| 1295 | drconf_cell_cnt = of_get_drconf_memory(memory, &dm); |
| 1296 | lmb_size = of_get_lmb_size(memory); |
| 1297 | of_node_put(memory); |
| 1298 | } |
| 1299 | return lmb_size * drconf_cell_cnt; |
| 1300 | } |
| 1301 | |
| 1302 | /* |
| 1303 | * memory_hotplug_max - return max address of memory that may be added |
| 1304 | * |
| 1305 | * This is currently only used on systems that support drconfig memory |
| 1306 | * hotplug. |
| 1307 | */ |
| 1308 | u64 memory_hotplug_max(void) |
| 1309 | { |
| 1310 | return max(hot_add_drconf_memory_max(), memblock_end_of_DRAM()); |
| 1311 | } |
Mike Kravetz | 237a0989 | 2005-12-05 12:06:42 -0800 | [diff] [blame] | 1312 | #endif /* CONFIG_MEMORY_HOTPLUG */ |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1313 | |
Jesse Larrew | bd03403 | 2011-01-20 19:00:51 +0000 | [diff] [blame] | 1314 | /* Virtual Processor Home Node (VPHN) support */ |
Jesse Larrew | 39bf990 | 2010-12-17 22:07:47 +0000 | [diff] [blame] | 1315 | #ifdef CONFIG_PPC_SPLPAR |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1316 | struct topology_update_data { |
| 1317 | struct topology_update_data *next; |
| 1318 | unsigned int cpu; |
| 1319 | int old_nid; |
| 1320 | int new_nid; |
| 1321 | }; |
| 1322 | |
Anton Blanchard | 5de1669 | 2011-01-29 12:24:34 +0000 | [diff] [blame] | 1323 | static u8 vphn_cpu_change_counts[NR_CPUS][MAX_DISTANCE_REF_POINTS]; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1324 | static cpumask_t cpu_associativity_changes_mask; |
| 1325 | static int vphn_enabled; |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1326 | static int prrn_enabled; |
| 1327 | static void reset_topology_timer(void); |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1328 | |
| 1329 | /* |
| 1330 | * Store the current values of the associativity change counters in the |
| 1331 | * hypervisor. |
| 1332 | */ |
| 1333 | static void setup_cpu_associativity_change_counters(void) |
| 1334 | { |
Jesse Larrew | cd9d6cc | 2011-01-20 19:01:35 +0000 | [diff] [blame] | 1335 | int cpu; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1336 | |
Anton Blanchard | 5de1669 | 2011-01-29 12:24:34 +0000 | [diff] [blame] | 1337 | /* The VPHN feature supports a maximum of 8 reference points */ |
| 1338 | BUILD_BUG_ON(MAX_DISTANCE_REF_POINTS > 8); |
| 1339 | |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1340 | for_each_possible_cpu(cpu) { |
Jesse Larrew | cd9d6cc | 2011-01-20 19:01:35 +0000 | [diff] [blame] | 1341 | int i; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1342 | u8 *counts = vphn_cpu_change_counts[cpu]; |
| 1343 | volatile u8 *hypervisor_counts = lppaca[cpu].vphn_assoc_counts; |
| 1344 | |
Anton Blanchard | 5de1669 | 2011-01-29 12:24:34 +0000 | [diff] [blame] | 1345 | for (i = 0; i < distance_ref_points_depth; i++) |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1346 | counts[i] = hypervisor_counts[i]; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1347 | } |
| 1348 | } |
| 1349 | |
| 1350 | /* |
| 1351 | * The hypervisor maintains a set of 8 associativity change counters in |
| 1352 | * the VPA of each cpu that correspond to the associativity levels in the |
| 1353 | * ibm,associativity-reference-points property. When an associativity |
| 1354 | * level changes, the corresponding counter is incremented. |
| 1355 | * |
| 1356 | * Set a bit in cpu_associativity_changes_mask for each cpu whose home |
| 1357 | * node associativity levels have changed. |
| 1358 | * |
| 1359 | * Returns the number of cpus with unhandled associativity changes. |
| 1360 | */ |
| 1361 | static int update_cpu_associativity_changes_mask(void) |
| 1362 | { |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1363 | int cpu; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1364 | cpumask_t *changes = &cpu_associativity_changes_mask; |
| 1365 | |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1366 | for_each_possible_cpu(cpu) { |
| 1367 | int i, changed = 0; |
| 1368 | u8 *counts = vphn_cpu_change_counts[cpu]; |
| 1369 | volatile u8 *hypervisor_counts = lppaca[cpu].vphn_assoc_counts; |
| 1370 | |
Anton Blanchard | 5de1669 | 2011-01-29 12:24:34 +0000 | [diff] [blame] | 1371 | for (i = 0; i < distance_ref_points_depth; i++) { |
Anton Blanchard | d69043e | 2011-01-29 12:26:19 +0000 | [diff] [blame] | 1372 | if (hypervisor_counts[i] != counts[i]) { |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1373 | counts[i] = hypervisor_counts[i]; |
| 1374 | changed = 1; |
| 1375 | } |
| 1376 | } |
| 1377 | if (changed) { |
Robert Jennings | 3be7db6 | 2013-07-24 20:13:21 -0500 | [diff] [blame] | 1378 | cpumask_or(changes, changes, cpu_sibling_mask(cpu)); |
| 1379 | cpu = cpu_last_thread_sibling(cpu); |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1380 | } |
| 1381 | } |
| 1382 | |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1383 | return cpumask_weight(changes); |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1384 | } |
| 1385 | |
Anton Blanchard | c0e5e46 | 2011-01-29 12:28:04 +0000 | [diff] [blame] | 1386 | /* |
| 1387 | * 6 64-bit registers unpacked into 12 32-bit associativity values. To form |
| 1388 | * the complete property we have to add the length in the first cell. |
| 1389 | */ |
| 1390 | #define VPHN_ASSOC_BUFSIZE (6*sizeof(u64)/sizeof(u32) + 1) |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1391 | |
| 1392 | /* |
| 1393 | * Convert the associativity domain numbers returned from the hypervisor |
| 1394 | * to the sequence they would appear in the ibm,associativity property. |
| 1395 | */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1396 | static int vphn_unpack_associativity(const long *packed, __be32 *unpacked) |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1397 | { |
Jesse Larrew | cd9d6cc | 2011-01-20 19:01:35 +0000 | [diff] [blame] | 1398 | int i, nr_assoc_doms = 0; |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1399 | const __be16 *field = (const __be16 *) packed; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1400 | |
| 1401 | #define VPHN_FIELD_UNUSED (0xffff) |
| 1402 | #define VPHN_FIELD_MSB (0x8000) |
| 1403 | #define VPHN_FIELD_MASK (~VPHN_FIELD_MSB) |
| 1404 | |
Anton Blanchard | c0e5e46 | 2011-01-29 12:28:04 +0000 | [diff] [blame] | 1405 | for (i = 1; i < VPHN_ASSOC_BUFSIZE; i++) { |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1406 | if (be16_to_cpup(field) == VPHN_FIELD_UNUSED) { |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1407 | /* All significant fields processed, and remaining |
| 1408 | * fields contain the reserved value of all 1's. |
| 1409 | * Just store them. |
| 1410 | */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1411 | unpacked[i] = *((__be32 *)field); |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1412 | field += 2; |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1413 | } else if (be16_to_cpup(field) & VPHN_FIELD_MSB) { |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1414 | /* Data is in the lower 15 bits of this field */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1415 | unpacked[i] = cpu_to_be32( |
| 1416 | be16_to_cpup(field) & VPHN_FIELD_MASK); |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1417 | field++; |
| 1418 | nr_assoc_doms++; |
Jesse Larrew | 7639ada | 2011-01-20 19:01:13 +0000 | [diff] [blame] | 1419 | } else { |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1420 | /* Data is in the lower 15 bits of this field |
| 1421 | * concatenated with the next 16 bit field |
| 1422 | */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1423 | unpacked[i] = *((__be32 *)field); |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1424 | field += 2; |
| 1425 | nr_assoc_doms++; |
| 1426 | } |
| 1427 | } |
| 1428 | |
Anton Blanchard | c0e5e46 | 2011-01-29 12:28:04 +0000 | [diff] [blame] | 1429 | /* The first cell contains the length of the property */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1430 | unpacked[0] = cpu_to_be32(nr_assoc_doms); |
Anton Blanchard | c0e5e46 | 2011-01-29 12:28:04 +0000 | [diff] [blame] | 1431 | |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1432 | return nr_assoc_doms; |
| 1433 | } |
| 1434 | |
| 1435 | /* |
| 1436 | * Retrieve the new associativity information for a virtual processor's |
| 1437 | * home node. |
| 1438 | */ |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1439 | static long hcall_vphn(unsigned long cpu, __be32 *associativity) |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1440 | { |
Jesse Larrew | cd9d6cc | 2011-01-20 19:01:35 +0000 | [diff] [blame] | 1441 | long rc; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1442 | long retbuf[PLPAR_HCALL9_BUFSIZE] = {0}; |
| 1443 | u64 flags = 1; |
| 1444 | int hwcpu = get_hard_smp_processor_id(cpu); |
| 1445 | |
| 1446 | rc = plpar_hcall9(H_HOME_NODE_ASSOCIATIVITY, retbuf, flags, hwcpu); |
| 1447 | vphn_unpack_associativity(retbuf, associativity); |
| 1448 | |
| 1449 | return rc; |
| 1450 | } |
| 1451 | |
| 1452 | static long vphn_get_associativity(unsigned long cpu, |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1453 | __be32 *associativity) |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1454 | { |
Jesse Larrew | cd9d6cc | 2011-01-20 19:01:35 +0000 | [diff] [blame] | 1455 | long rc; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1456 | |
| 1457 | rc = hcall_vphn(cpu, associativity); |
| 1458 | |
| 1459 | switch (rc) { |
| 1460 | case H_FUNCTION: |
| 1461 | printk(KERN_INFO |
| 1462 | "VPHN is not supported. Disabling polling...\n"); |
| 1463 | stop_topology_update(); |
| 1464 | break; |
| 1465 | case H_HARDWARE: |
| 1466 | printk(KERN_ERR |
| 1467 | "hcall_vphn() experienced a hardware fault " |
| 1468 | "preventing VPHN. Disabling polling...\n"); |
| 1469 | stop_topology_update(); |
| 1470 | } |
| 1471 | |
| 1472 | return rc; |
| 1473 | } |
| 1474 | |
| 1475 | /* |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1476 | * Update the CPU maps and sysfs entries for a single CPU when its NUMA |
| 1477 | * characteristics change. This function doesn't perform any locking and is |
| 1478 | * only safe to call from stop_machine(). |
| 1479 | */ |
| 1480 | static int update_cpu_topology(void *data) |
| 1481 | { |
| 1482 | struct topology_update_data *update; |
| 1483 | unsigned long cpu; |
| 1484 | |
| 1485 | if (!data) |
| 1486 | return -EINVAL; |
| 1487 | |
Robert Jennings | 3be7db6 | 2013-07-24 20:13:21 -0500 | [diff] [blame] | 1488 | cpu = smp_processor_id(); |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1489 | |
| 1490 | for (update = data; update; update = update->next) { |
| 1491 | if (cpu != update->cpu) |
| 1492 | continue; |
| 1493 | |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1494 | unmap_cpu_from_node(update->cpu); |
| 1495 | map_cpu_to_node(update->cpu, update->new_nid); |
Jesse Larrew | 176bbf1 | 2013-04-24 06:03:48 +0000 | [diff] [blame] | 1496 | vdso_getcpu_init(); |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1497 | } |
| 1498 | |
| 1499 | return 0; |
| 1500 | } |
| 1501 | |
Srivatsa S. Bhat | d4edc5b | 2013-12-30 17:05:34 +0530 | [diff] [blame] | 1502 | static int update_lookup_table(void *data) |
| 1503 | { |
| 1504 | struct topology_update_data *update; |
| 1505 | |
| 1506 | if (!data) |
| 1507 | return -EINVAL; |
| 1508 | |
| 1509 | /* |
| 1510 | * Upon topology update, the numa-cpu lookup table needs to be updated |
| 1511 | * for all threads in the core, including offline CPUs, to ensure that |
| 1512 | * future hotplug operations respect the cpu-to-node associativity |
| 1513 | * properly. |
| 1514 | */ |
| 1515 | for (update = data; update; update = update->next) { |
| 1516 | int nid, base, j; |
| 1517 | |
| 1518 | nid = update->new_nid; |
| 1519 | base = cpu_first_thread_sibling(update->cpu); |
| 1520 | |
| 1521 | for (j = 0; j < threads_per_core; j++) { |
| 1522 | update_numa_cpu_lookup_table(base + j, nid); |
| 1523 | } |
| 1524 | } |
| 1525 | |
| 1526 | return 0; |
| 1527 | } |
| 1528 | |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1529 | /* |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1530 | * Update the node maps and sysfs entries for each cpu whose home node |
Jesse Larrew | 79c5fce | 2012-06-07 16:04:34 -0500 | [diff] [blame] | 1531 | * has changed. Returns 1 when the topology has changed, and 0 otherwise. |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1532 | */ |
| 1533 | int arch_update_cpu_topology(void) |
| 1534 | { |
Robert Jennings | 3be7db6 | 2013-07-24 20:13:21 -0500 | [diff] [blame] | 1535 | unsigned int cpu, sibling, changed = 0; |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1536 | struct topology_update_data *updates, *ud; |
Alistair Popple | b08a2a1 | 2013-08-07 02:01:44 +1000 | [diff] [blame] | 1537 | __be32 associativity[VPHN_ASSOC_BUFSIZE] = {0}; |
Jesse Larrew | 176bbf1 | 2013-04-24 06:03:48 +0000 | [diff] [blame] | 1538 | cpumask_t updated_cpus; |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 1539 | struct device *dev; |
Robert Jennings | 3be7db6 | 2013-07-24 20:13:21 -0500 | [diff] [blame] | 1540 | int weight, new_nid, i = 0; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1541 | |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1542 | weight = cpumask_weight(&cpu_associativity_changes_mask); |
| 1543 | if (!weight) |
| 1544 | return 0; |
| 1545 | |
| 1546 | updates = kzalloc(weight * (sizeof(*updates)), GFP_KERNEL); |
| 1547 | if (!updates) |
| 1548 | return 0; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1549 | |
Jesse Larrew | 176bbf1 | 2013-04-24 06:03:48 +0000 | [diff] [blame] | 1550 | cpumask_clear(&updated_cpus); |
| 1551 | |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1552 | for_each_cpu(cpu, &cpu_associativity_changes_mask) { |
Robert Jennings | 3be7db6 | 2013-07-24 20:13:21 -0500 | [diff] [blame] | 1553 | /* |
| 1554 | * If siblings aren't flagged for changes, updates list |
| 1555 | * will be too short. Skip on this update and set for next |
| 1556 | * update. |
| 1557 | */ |
| 1558 | if (!cpumask_subset(cpu_sibling_mask(cpu), |
| 1559 | &cpu_associativity_changes_mask)) { |
| 1560 | pr_info("Sibling bits not set for associativity " |
| 1561 | "change, cpu%d\n", cpu); |
| 1562 | cpumask_or(&cpu_associativity_changes_mask, |
| 1563 | &cpu_associativity_changes_mask, |
| 1564 | cpu_sibling_mask(cpu)); |
| 1565 | cpu = cpu_last_thread_sibling(cpu); |
| 1566 | continue; |
| 1567 | } |
| 1568 | |
| 1569 | /* Use associativity from first thread for all siblings */ |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1570 | vphn_get_associativity(cpu, associativity); |
Robert Jennings | 3be7db6 | 2013-07-24 20:13:21 -0500 | [diff] [blame] | 1571 | new_nid = associativity_to_nid(associativity); |
| 1572 | if (new_nid < 0 || !node_online(new_nid)) |
| 1573 | new_nid = first_online_node; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1574 | |
Robert Jennings | 3be7db6 | 2013-07-24 20:13:21 -0500 | [diff] [blame] | 1575 | if (new_nid == numa_cpu_lookup_table[cpu]) { |
| 1576 | cpumask_andnot(&cpu_associativity_changes_mask, |
| 1577 | &cpu_associativity_changes_mask, |
| 1578 | cpu_sibling_mask(cpu)); |
| 1579 | cpu = cpu_last_thread_sibling(cpu); |
| 1580 | continue; |
| 1581 | } |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1582 | |
Robert Jennings | 3be7db6 | 2013-07-24 20:13:21 -0500 | [diff] [blame] | 1583 | for_each_cpu(sibling, cpu_sibling_mask(cpu)) { |
| 1584 | ud = &updates[i++]; |
| 1585 | ud->cpu = sibling; |
| 1586 | ud->new_nid = new_nid; |
| 1587 | ud->old_nid = numa_cpu_lookup_table[sibling]; |
| 1588 | cpumask_set_cpu(sibling, &updated_cpus); |
| 1589 | if (i < weight) |
| 1590 | ud->next = &updates[i]; |
| 1591 | } |
| 1592 | cpu = cpu_last_thread_sibling(cpu); |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1593 | } |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1594 | |
Michael Wang | 9a01336 | 2014-04-08 11:19:36 +0800 | [diff] [blame] | 1595 | /* |
| 1596 | * In cases where we have nothing to update (because the updates list |
| 1597 | * is too short or because the new topology is same as the old one), |
| 1598 | * skip invoking update_cpu_topology() via stop-machine(). This is |
| 1599 | * necessary (and not just a fast-path optimization) since stop-machine |
| 1600 | * can end up electing a random CPU to run update_cpu_topology(), and |
| 1601 | * thus trick us into setting up incorrect cpu-node mappings (since |
| 1602 | * 'updates' is kzalloc()'ed). |
| 1603 | * |
| 1604 | * And for the similar reason, we will skip all the following updating. |
| 1605 | */ |
| 1606 | if (!cpumask_weight(&updated_cpus)) |
| 1607 | goto out; |
| 1608 | |
Jesse Larrew | 176bbf1 | 2013-04-24 06:03:48 +0000 | [diff] [blame] | 1609 | stop_machine(update_cpu_topology, &updates[0], &updated_cpus); |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1610 | |
Srivatsa S. Bhat | d4edc5b | 2013-12-30 17:05:34 +0530 | [diff] [blame] | 1611 | /* |
| 1612 | * Update the numa-cpu lookup table with the new mappings, even for |
| 1613 | * offline CPUs. It is best to perform this update from the stop- |
| 1614 | * machine context. |
| 1615 | */ |
| 1616 | stop_machine(update_lookup_table, &updates[0], |
| 1617 | cpumask_of(raw_smp_processor_id())); |
| 1618 | |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1619 | for (ud = &updates[0]; ud; ud = ud->next) { |
Nathan Fontenot | dd02321 | 2013-06-24 22:08:05 -0500 | [diff] [blame] | 1620 | unregister_cpu_under_node(ud->cpu, ud->old_nid); |
| 1621 | register_cpu_under_node(ud->cpu, ud->new_nid); |
| 1622 | |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1623 | dev = get_cpu_device(ud->cpu); |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 1624 | if (dev) |
| 1625 | kobject_uevent(&dev->kobj, KOBJ_CHANGE); |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1626 | cpumask_clear_cpu(ud->cpu, &cpu_associativity_changes_mask); |
Jesse Larrew | 79c5fce | 2012-06-07 16:04:34 -0500 | [diff] [blame] | 1627 | changed = 1; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1628 | } |
| 1629 | |
Michael Wang | 9a01336 | 2014-04-08 11:19:36 +0800 | [diff] [blame] | 1630 | out: |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1631 | kfree(updates); |
Jesse Larrew | 79c5fce | 2012-06-07 16:04:34 -0500 | [diff] [blame] | 1632 | return changed; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1633 | } |
| 1634 | |
| 1635 | static void topology_work_fn(struct work_struct *work) |
| 1636 | { |
| 1637 | rebuild_sched_domains(); |
| 1638 | } |
| 1639 | static DECLARE_WORK(topology_work, topology_work_fn); |
| 1640 | |
Robert Jennings | ec32dd6 | 2013-10-28 09:20:50 -0500 | [diff] [blame] | 1641 | static void topology_schedule_update(void) |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1642 | { |
| 1643 | schedule_work(&topology_work); |
| 1644 | } |
| 1645 | |
| 1646 | static void topology_timer_fn(unsigned long ignored) |
| 1647 | { |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1648 | if (prrn_enabled && cpumask_weight(&cpu_associativity_changes_mask)) |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1649 | topology_schedule_update(); |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1650 | else if (vphn_enabled) { |
| 1651 | if (update_cpu_associativity_changes_mask() > 0) |
| 1652 | topology_schedule_update(); |
| 1653 | reset_topology_timer(); |
| 1654 | } |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1655 | } |
| 1656 | static struct timer_list topology_timer = |
| 1657 | TIMER_INITIALIZER(topology_timer_fn, 0, 0); |
| 1658 | |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1659 | static void reset_topology_timer(void) |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1660 | { |
| 1661 | topology_timer.data = 0; |
| 1662 | topology_timer.expires = jiffies + 60 * HZ; |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1663 | mod_timer(&topology_timer, topology_timer.expires); |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1664 | } |
| 1665 | |
Nathan Fontenot | 601abdc3 | 2013-04-29 03:45:36 +0000 | [diff] [blame] | 1666 | #ifdef CONFIG_SMP |
| 1667 | |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1668 | static void stage_topology_update(int core_id) |
| 1669 | { |
| 1670 | cpumask_or(&cpu_associativity_changes_mask, |
| 1671 | &cpu_associativity_changes_mask, cpu_sibling_mask(core_id)); |
| 1672 | reset_topology_timer(); |
| 1673 | } |
| 1674 | |
| 1675 | static int dt_update_callback(struct notifier_block *nb, |
| 1676 | unsigned long action, void *data) |
| 1677 | { |
| 1678 | struct of_prop_reconfig *update; |
| 1679 | int rc = NOTIFY_DONE; |
| 1680 | |
| 1681 | switch (action) { |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1682 | case OF_RECONFIG_UPDATE_PROPERTY: |
| 1683 | update = (struct of_prop_reconfig *)data; |
Nathan Fontenot | 30c0535 | 2013-04-24 06:02:13 +0000 | [diff] [blame] | 1684 | if (!of_prop_cmp(update->dn->type, "cpu") && |
| 1685 | !of_prop_cmp(update->prop->name, "ibm,associativity")) { |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1686 | u32 core_id; |
| 1687 | of_property_read_u32(update->dn, "reg", &core_id); |
| 1688 | stage_topology_update(core_id); |
| 1689 | rc = NOTIFY_OK; |
| 1690 | } |
| 1691 | break; |
| 1692 | } |
| 1693 | |
| 1694 | return rc; |
| 1695 | } |
| 1696 | |
| 1697 | static struct notifier_block dt_update_nb = { |
| 1698 | .notifier_call = dt_update_callback, |
| 1699 | }; |
| 1700 | |
Nathan Fontenot | 601abdc3 | 2013-04-29 03:45:36 +0000 | [diff] [blame] | 1701 | #endif |
| 1702 | |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1703 | /* |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1704 | * Start polling for associativity changes. |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1705 | */ |
| 1706 | int start_topology_update(void) |
| 1707 | { |
| 1708 | int rc = 0; |
| 1709 | |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1710 | if (firmware_has_feature(FW_FEATURE_PRRN)) { |
| 1711 | if (!prrn_enabled) { |
| 1712 | prrn_enabled = 1; |
| 1713 | vphn_enabled = 0; |
Nathan Fontenot | 601abdc3 | 2013-04-29 03:45:36 +0000 | [diff] [blame] | 1714 | #ifdef CONFIG_SMP |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1715 | rc = of_reconfig_notifier_register(&dt_update_nb); |
Nathan Fontenot | 601abdc3 | 2013-04-29 03:45:36 +0000 | [diff] [blame] | 1716 | #endif |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1717 | } |
Jesse Larrew | b7abef0 | 2013-04-24 06:05:22 +0000 | [diff] [blame] | 1718 | } else if (firmware_has_feature(FW_FEATURE_VPHN) && |
Anton Blanchard | f13c13a | 2013-08-07 02:01:26 +1000 | [diff] [blame] | 1719 | lppaca_shared_proc(get_lppaca())) { |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1720 | if (!vphn_enabled) { |
| 1721 | prrn_enabled = 0; |
| 1722 | vphn_enabled = 1; |
| 1723 | setup_cpu_associativity_change_counters(); |
| 1724 | init_timer_deferrable(&topology_timer); |
| 1725 | reset_topology_timer(); |
| 1726 | } |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1727 | } |
| 1728 | |
| 1729 | return rc; |
| 1730 | } |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1731 | |
| 1732 | /* |
| 1733 | * Disable polling for VPHN associativity changes. |
| 1734 | */ |
| 1735 | int stop_topology_update(void) |
| 1736 | { |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1737 | int rc = 0; |
| 1738 | |
| 1739 | if (prrn_enabled) { |
| 1740 | prrn_enabled = 0; |
Nathan Fontenot | 601abdc3 | 2013-04-29 03:45:36 +0000 | [diff] [blame] | 1741 | #ifdef CONFIG_SMP |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1742 | rc = of_reconfig_notifier_unregister(&dt_update_nb); |
Nathan Fontenot | 601abdc3 | 2013-04-29 03:45:36 +0000 | [diff] [blame] | 1743 | #endif |
Jesse Larrew | 5d88aa8 | 2013-04-24 06:00:35 +0000 | [diff] [blame] | 1744 | } else if (vphn_enabled) { |
| 1745 | vphn_enabled = 0; |
| 1746 | rc = del_timer_sync(&topology_timer); |
| 1747 | } |
| 1748 | |
| 1749 | return rc; |
Jesse Larrew | 9eff1a3 | 2010-12-01 12:31:15 +0000 | [diff] [blame] | 1750 | } |
Nathan Fontenot | e04fa61 | 2013-04-24 06:07:39 +0000 | [diff] [blame] | 1751 | |
| 1752 | int prrn_is_enabled(void) |
| 1753 | { |
| 1754 | return prrn_enabled; |
| 1755 | } |
| 1756 | |
| 1757 | static int topology_read(struct seq_file *file, void *v) |
| 1758 | { |
| 1759 | if (vphn_enabled || prrn_enabled) |
| 1760 | seq_puts(file, "on\n"); |
| 1761 | else |
| 1762 | seq_puts(file, "off\n"); |
| 1763 | |
| 1764 | return 0; |
| 1765 | } |
| 1766 | |
| 1767 | static int topology_open(struct inode *inode, struct file *file) |
| 1768 | { |
| 1769 | return single_open(file, topology_read, NULL); |
| 1770 | } |
| 1771 | |
| 1772 | static ssize_t topology_write(struct file *file, const char __user *buf, |
| 1773 | size_t count, loff_t *off) |
| 1774 | { |
| 1775 | char kbuf[4]; /* "on" or "off" plus null. */ |
| 1776 | int read_len; |
| 1777 | |
| 1778 | read_len = count < 3 ? count : 3; |
| 1779 | if (copy_from_user(kbuf, buf, read_len)) |
| 1780 | return -EINVAL; |
| 1781 | |
| 1782 | kbuf[read_len] = '\0'; |
| 1783 | |
| 1784 | if (!strncmp(kbuf, "on", 2)) |
| 1785 | start_topology_update(); |
| 1786 | else if (!strncmp(kbuf, "off", 3)) |
| 1787 | stop_topology_update(); |
| 1788 | else |
| 1789 | return -EINVAL; |
| 1790 | |
| 1791 | return count; |
| 1792 | } |
| 1793 | |
| 1794 | static const struct file_operations topology_ops = { |
| 1795 | .read = seq_read, |
| 1796 | .write = topology_write, |
| 1797 | .open = topology_open, |
| 1798 | .release = single_release |
| 1799 | }; |
| 1800 | |
| 1801 | static int topology_update_init(void) |
| 1802 | { |
| 1803 | start_topology_update(); |
Joe Perches | 316d7188 | 2014-01-28 10:22:22 -0800 | [diff] [blame] | 1804 | proc_create("powerpc/topology_updates", 0644, NULL, &topology_ops); |
Nathan Fontenot | e04fa61 | 2013-04-24 06:07:39 +0000 | [diff] [blame] | 1805 | |
| 1806 | return 0; |
| 1807 | } |
| 1808 | device_initcall(topology_update_init); |
Jesse Larrew | 39bf990 | 2010-12-17 22:07:47 +0000 | [diff] [blame] | 1809 | #endif /* CONFIG_PPC_SPLPAR */ |