Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/sysdev.h> |
2 | #include <linux/cpu.h> | |
3 | #include <linux/smp.h> | |
4 | #include <linux/percpu.h> | |
5 | #include <linux/init.h> | |
6 | #include <linux/sched.h> | |
7 | #include <linux/module.h> | |
8 | #include <linux/nodemask.h> | |
9 | #include <linux/cpumask.h> | |
10 | #include <linux/notifier.h> | |
11 | ||
12 | #include <asm/current.h> | |
13 | #include <asm/processor.h> | |
14 | #include <asm/cputable.h> | |
1ababe11 | 15 | #include <asm/firmware.h> |
1da177e4 LT |
16 | #include <asm/hvcall.h> |
17 | #include <asm/prom.h> | |
1da177e4 | 18 | #include <asm/machdep.h> |
2249ca9d | 19 | #include <asm/smp.h> |
1da177e4 | 20 | |
b950bdd0 BH |
21 | #ifdef CONFIG_PPC64 |
22 | #include <asm/paca.h> | |
23 | #include <asm/lppaca.h> | |
24 | #endif | |
25 | ||
1da177e4 LT |
26 | static DEFINE_PER_CPU(struct cpu, cpu_devices); |
27 | ||
124c27d3 NL |
28 | static DEFINE_PER_CPU(struct kobject *, cache_toplevel); |
29 | ||
b950bdd0 BH |
30 | /* |
31 | * SMT snooze delay stuff, 64-bit only for now | |
32 | */ | |
33 | ||
34 | #ifdef CONFIG_PPC64 | |
1da177e4 | 35 | |
0ddd3e7d AB |
36 | /* Time in microseconds we delay before sleeping in the idle loop */ |
37 | DEFINE_PER_CPU(unsigned long, smt_snooze_delay) = { 100 }; | |
1da177e4 | 38 | |
4a0b2b4d AK |
39 | static ssize_t store_smt_snooze_delay(struct sys_device *dev, |
40 | struct sysdev_attribute *attr, | |
41 | const char *buf, | |
1da177e4 LT |
42 | size_t count) |
43 | { | |
44 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); | |
45 | ssize_t ret; | |
46 | unsigned long snooze; | |
47 | ||
48 | ret = sscanf(buf, "%lu", &snooze); | |
49 | if (ret != 1) | |
50 | return -EINVAL; | |
51 | ||
52 | per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze; | |
53 | ||
54 | return count; | |
55 | } | |
56 | ||
4a0b2b4d AK |
57 | static ssize_t show_smt_snooze_delay(struct sys_device *dev, |
58 | struct sysdev_attribute *attr, | |
59 | char *buf) | |
1da177e4 LT |
60 | { |
61 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); | |
62 | ||
63 | return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id)); | |
64 | } | |
65 | ||
66 | static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay, | |
67 | store_smt_snooze_delay); | |
68 | ||
69 | /* Only parse OF options if the matching cmdline option was not specified */ | |
70 | static int smt_snooze_cmdline; | |
71 | ||
72 | static int __init smt_setup(void) | |
73 | { | |
74 | struct device_node *options; | |
a7f67bdf | 75 | const unsigned int *val; |
1da177e4 LT |
76 | unsigned int cpu; |
77 | ||
78 | if (!cpu_has_feature(CPU_FTR_SMT)) | |
69ed3324 | 79 | return -ENODEV; |
1da177e4 | 80 | |
8c8dc322 | 81 | options = of_find_node_by_path("/options"); |
1da177e4 | 82 | if (!options) |
69ed3324 | 83 | return -ENODEV; |
1da177e4 | 84 | |
e2eb6392 | 85 | val = of_get_property(options, "ibm,smt-snooze-delay", NULL); |
1da177e4 | 86 | if (!smt_snooze_cmdline && val) { |
0e551954 | 87 | for_each_possible_cpu(cpu) |
1da177e4 LT |
88 | per_cpu(smt_snooze_delay, cpu) = *val; |
89 | } | |
90 | ||
8c8dc322 | 91 | of_node_put(options); |
69ed3324 | 92 | return 0; |
1da177e4 LT |
93 | } |
94 | __initcall(smt_setup); | |
95 | ||
96 | static int __init setup_smt_snooze_delay(char *str) | |
97 | { | |
98 | unsigned int cpu; | |
99 | int snooze; | |
100 | ||
101 | if (!cpu_has_feature(CPU_FTR_SMT)) | |
102 | return 1; | |
103 | ||
104 | smt_snooze_cmdline = 1; | |
105 | ||
106 | if (get_option(&str, &snooze)) { | |
0e551954 | 107 | for_each_possible_cpu(cpu) |
1da177e4 LT |
108 | per_cpu(smt_snooze_delay, cpu) = snooze; |
109 | } | |
110 | ||
111 | return 1; | |
112 | } | |
113 | __setup("smt-snooze-delay=", setup_smt_snooze_delay); | |
114 | ||
b950bdd0 | 115 | #endif /* CONFIG_PPC64 */ |
180a3362 | 116 | |
1da177e4 LT |
117 | /* |
118 | * Enabling PMCs will slow partition context switch times so we only do | |
119 | * it the first time we write to the PMCs. | |
120 | */ | |
121 | ||
122 | static DEFINE_PER_CPU(char, pmcs_enabled); | |
123 | ||
b950bdd0 | 124 | void ppc_enable_pmcs(void) |
1da177e4 | 125 | { |
1da177e4 LT |
126 | /* Only need to enable them once */ |
127 | if (__get_cpu_var(pmcs_enabled)) | |
128 | return; | |
129 | ||
130 | __get_cpu_var(pmcs_enabled) = 1; | |
131 | ||
180a3362 ME |
132 | if (ppc_md.enable_pmcs) |
133 | ppc_md.enable_pmcs(); | |
1da177e4 | 134 | } |
b950bdd0 | 135 | EXPORT_SYMBOL(ppc_enable_pmcs); |
1da177e4 | 136 | |
33a7f122 | 137 | #if defined(CONFIG_6xx) || defined(CONFIG_PPC64) |
1da177e4 LT |
138 | /* XXX convert to rusty's on_one_cpu */ |
139 | static unsigned long run_on_cpu(unsigned long cpu, | |
140 | unsigned long (*func)(unsigned long), | |
141 | unsigned long arg) | |
142 | { | |
143 | cpumask_t old_affinity = current->cpus_allowed; | |
144 | unsigned long ret; | |
145 | ||
146 | /* should return -EINVAL to userspace */ | |
147 | if (set_cpus_allowed(current, cpumask_of_cpu(cpu))) | |
148 | return 0; | |
149 | ||
150 | ret = func(arg); | |
151 | ||
152 | set_cpus_allowed(current, old_affinity); | |
153 | ||
154 | return ret; | |
155 | } | |
33a7f122 | 156 | #endif |
1da177e4 LT |
157 | |
158 | #define SYSFS_PMCSETUP(NAME, ADDRESS) \ | |
159 | static unsigned long read_##NAME(unsigned long junk) \ | |
160 | { \ | |
161 | return mfspr(ADDRESS); \ | |
162 | } \ | |
163 | static unsigned long write_##NAME(unsigned long val) \ | |
164 | { \ | |
b950bdd0 | 165 | ppc_enable_pmcs(); \ |
1da177e4 LT |
166 | mtspr(ADDRESS, val); \ |
167 | return 0; \ | |
168 | } \ | |
4a0b2b4d AK |
169 | static ssize_t show_##NAME(struct sys_device *dev, \ |
170 | struct sysdev_attribute *attr, \ | |
171 | char *buf) \ | |
1da177e4 LT |
172 | { \ |
173 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ | |
174 | unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \ | |
175 | return sprintf(buf, "%lx\n", val); \ | |
176 | } \ | |
3ff6eecc | 177 | static ssize_t __used \ |
4a0b2b4d AK |
178 | store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \ |
179 | const char *buf, size_t count) \ | |
1da177e4 LT |
180 | { \ |
181 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ | |
182 | unsigned long val; \ | |
183 | int ret = sscanf(buf, "%lx", &val); \ | |
184 | if (ret != 1) \ | |
185 | return -EINVAL; \ | |
186 | run_on_cpu(cpu->sysdev.id, write_##NAME, val); \ | |
187 | return count; \ | |
188 | } | |
189 | ||
6529c13d OJ |
190 | |
191 | /* Let's define all possible registers, we'll only hook up the ones | |
192 | * that are implemented on the current processor | |
193 | */ | |
194 | ||
33a7f122 | 195 | #if defined(CONFIG_PPC64) |
b950bdd0 BH |
196 | #define HAS_PPC_PMC_CLASSIC 1 |
197 | #define HAS_PPC_PMC_IBM 1 | |
198 | #define HAS_PPC_PMC_PA6T 1 | |
33a7f122 | 199 | #elif defined(CONFIG_6xx) |
b950bdd0 BH |
200 | #define HAS_PPC_PMC_CLASSIC 1 |
201 | #define HAS_PPC_PMC_IBM 1 | |
202 | #define HAS_PPC_PMC_G4 1 | |
203 | #endif | |
204 | ||
205 | ||
206 | #ifdef HAS_PPC_PMC_CLASSIC | |
1da177e4 LT |
207 | SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0); |
208 | SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1); | |
1da177e4 LT |
209 | SYSFS_PMCSETUP(pmc1, SPRN_PMC1); |
210 | SYSFS_PMCSETUP(pmc2, SPRN_PMC2); | |
211 | SYSFS_PMCSETUP(pmc3, SPRN_PMC3); | |
212 | SYSFS_PMCSETUP(pmc4, SPRN_PMC4); | |
213 | SYSFS_PMCSETUP(pmc5, SPRN_PMC5); | |
214 | SYSFS_PMCSETUP(pmc6, SPRN_PMC6); | |
b950bdd0 BH |
215 | |
216 | #ifdef HAS_PPC_PMC_G4 | |
217 | SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2); | |
218 | #endif | |
219 | ||
220 | #ifdef CONFIG_PPC64 | |
1da177e4 LT |
221 | SYSFS_PMCSETUP(pmc7, SPRN_PMC7); |
222 | SYSFS_PMCSETUP(pmc8, SPRN_PMC8); | |
b950bdd0 BH |
223 | |
224 | SYSFS_PMCSETUP(mmcra, SPRN_MMCRA); | |
1da177e4 | 225 | SYSFS_PMCSETUP(purr, SPRN_PURR); |
f050982a | 226 | SYSFS_PMCSETUP(spurr, SPRN_SPURR); |
4c198557 | 227 | SYSFS_PMCSETUP(dscr, SPRN_DSCR); |
1da177e4 | 228 | |
b950bdd0 BH |
229 | static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra); |
230 | static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL); | |
231 | static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr); | |
232 | static SYSDEV_ATTR(purr, 0600, show_purr, store_purr); | |
233 | #endif /* CONFIG_PPC64 */ | |
234 | ||
235 | #ifdef HAS_PPC_PMC_PA6T | |
25fc530e OJ |
236 | SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0); |
237 | SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1); | |
238 | SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2); | |
239 | SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3); | |
240 | SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4); | |
241 | SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5); | |
2e1957fd OJ |
242 | #ifdef CONFIG_DEBUG_KERNEL |
243 | SYSFS_PMCSETUP(hid0, SPRN_HID0); | |
244 | SYSFS_PMCSETUP(hid1, SPRN_HID1); | |
245 | SYSFS_PMCSETUP(hid4, SPRN_HID4); | |
246 | SYSFS_PMCSETUP(hid5, SPRN_HID5); | |
247 | SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0); | |
248 | SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1); | |
249 | SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2); | |
250 | SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3); | |
251 | SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4); | |
252 | SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5); | |
253 | SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6); | |
254 | SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7); | |
255 | SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8); | |
256 | SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9); | |
257 | SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT); | |
258 | SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR); | |
259 | SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR); | |
260 | SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR); | |
261 | SYSFS_PMCSETUP(der, SPRN_PA6T_DER); | |
262 | SYSFS_PMCSETUP(mer, SPRN_PA6T_MER); | |
263 | SYSFS_PMCSETUP(ber, SPRN_PA6T_BER); | |
264 | SYSFS_PMCSETUP(ier, SPRN_PA6T_IER); | |
265 | SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER); | |
266 | SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR); | |
267 | SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0); | |
268 | SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1); | |
269 | SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2); | |
270 | SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3); | |
271 | #endif /* CONFIG_DEBUG_KERNEL */ | |
b950bdd0 | 272 | #endif /* HAS_PPC_PMC_PA6T */ |
6529c13d | 273 | |
b950bdd0 | 274 | #ifdef HAS_PPC_PMC_IBM |
6529c13d OJ |
275 | static struct sysdev_attribute ibm_common_attrs[] = { |
276 | _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), | |
277 | _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), | |
278 | }; | |
b950bdd0 BH |
279 | #endif /* HAS_PPC_PMC_G4 */ |
280 | ||
281 | #ifdef HAS_PPC_PMC_G4 | |
282 | static struct sysdev_attribute g4_common_attrs[] = { | |
283 | _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), | |
284 | _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), | |
285 | _SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2), | |
286 | }; | |
287 | #endif /* HAS_PPC_PMC_G4 */ | |
6529c13d | 288 | |
b950bdd0 | 289 | static struct sysdev_attribute classic_pmc_attrs[] = { |
6529c13d OJ |
290 | _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1), |
291 | _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2), | |
292 | _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3), | |
293 | _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4), | |
294 | _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5), | |
295 | _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6), | |
b950bdd0 | 296 | #ifdef CONFIG_PPC64 |
6529c13d OJ |
297 | _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7), |
298 | _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8), | |
b950bdd0 | 299 | #endif |
6529c13d OJ |
300 | }; |
301 | ||
b950bdd0 | 302 | #ifdef HAS_PPC_PMC_PA6T |
6529c13d OJ |
303 | static struct sysdev_attribute pa6t_attrs[] = { |
304 | _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), | |
305 | _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), | |
306 | _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0), | |
307 | _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1), | |
308 | _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2), | |
309 | _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3), | |
310 | _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4), | |
311 | _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5), | |
2e1957fd OJ |
312 | #ifdef CONFIG_DEBUG_KERNEL |
313 | _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0), | |
314 | _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1), | |
315 | _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4), | |
316 | _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5), | |
317 | _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0), | |
318 | _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1), | |
319 | _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2), | |
320 | _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3), | |
321 | _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4), | |
322 | _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5), | |
323 | _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6), | |
324 | _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7), | |
325 | _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8), | |
326 | _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9), | |
327 | _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat), | |
328 | _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr), | |
329 | _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr), | |
330 | _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr), | |
331 | _SYSDEV_ATTR(der, 0600, show_der, store_der), | |
332 | _SYSDEV_ATTR(mer, 0600, show_mer, store_mer), | |
333 | _SYSDEV_ATTR(ber, 0600, show_ber, store_ber), | |
334 | _SYSDEV_ATTR(ier, 0600, show_ier, store_ier), | |
335 | _SYSDEV_ATTR(sier, 0600, show_sier, store_sier), | |
336 | _SYSDEV_ATTR(siar, 0600, show_siar, store_siar), | |
337 | _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0), | |
338 | _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1), | |
339 | _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2), | |
340 | _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3), | |
341 | #endif /* CONFIG_DEBUG_KERNEL */ | |
6529c13d | 342 | }; |
b950bdd0 BH |
343 | #endif /* HAS_PPC_PMC_PA6T */ |
344 | #endif /* HAS_PPC_PMC_CLASSIC */ | |
6529c13d | 345 | |
124c27d3 NL |
346 | struct cache_desc { |
347 | struct kobject kobj; | |
348 | struct cache_desc *next; | |
349 | const char *type; /* Instruction, Data, or Unified */ | |
350 | u32 size; /* total cache size in KB */ | |
351 | u32 line_size; /* in bytes */ | |
352 | u32 nr_sets; /* number of sets */ | |
353 | u32 level; /* e.g. 1, 2, 3... */ | |
354 | u32 associativity; /* e.g. 8-way... 0 is fully associative */ | |
355 | }; | |
356 | ||
357 | DEFINE_PER_CPU(struct cache_desc *, cache_desc); | |
358 | ||
359 | static struct cache_desc *kobj_to_cache_desc(struct kobject *k) | |
360 | { | |
361 | return container_of(k, struct cache_desc, kobj); | |
362 | } | |
363 | ||
364 | static void cache_desc_release(struct kobject *k) | |
365 | { | |
366 | struct cache_desc *desc = kobj_to_cache_desc(k); | |
367 | ||
368 | pr_debug("%s: releasing %s\n", __func__, kobject_name(k)); | |
369 | ||
370 | if (desc->next) | |
371 | kobject_put(&desc->next->kobj); | |
372 | ||
373 | kfree(kobj_to_cache_desc(k)); | |
374 | } | |
375 | ||
376 | static ssize_t cache_desc_show(struct kobject *k, struct attribute *attr, char *buf) | |
377 | { | |
378 | struct kobj_attribute *kobj_attr; | |
379 | ||
380 | kobj_attr = container_of(attr, struct kobj_attribute, attr); | |
381 | ||
382 | return kobj_attr->show(k, kobj_attr, buf); | |
383 | } | |
384 | ||
385 | static struct sysfs_ops cache_desc_sysfs_ops = { | |
386 | .show = cache_desc_show, | |
387 | }; | |
388 | ||
389 | static struct kobj_type cache_desc_type = { | |
390 | .release = cache_desc_release, | |
391 | .sysfs_ops = &cache_desc_sysfs_ops, | |
392 | }; | |
393 | ||
394 | static ssize_t cache_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
395 | { | |
396 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
397 | ||
398 | return sprintf(buf, "%uK\n", cache->size); | |
399 | } | |
400 | ||
401 | static struct kobj_attribute cache_size_attr = | |
402 | __ATTR(size, 0444, cache_size_show, NULL); | |
403 | ||
404 | static ssize_t cache_line_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
405 | { | |
406 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
407 | ||
408 | return sprintf(buf, "%u\n", cache->line_size); | |
409 | } | |
410 | ||
411 | static struct kobj_attribute cache_line_size_attr = | |
412 | __ATTR(coherency_line_size, 0444, cache_line_size_show, NULL); | |
413 | ||
414 | static ssize_t cache_nr_sets_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
415 | { | |
416 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
417 | ||
418 | return sprintf(buf, "%u\n", cache->nr_sets); | |
419 | } | |
420 | ||
421 | static struct kobj_attribute cache_nr_sets_attr = | |
422 | __ATTR(number_of_sets, 0444, cache_nr_sets_show, NULL); | |
423 | ||
424 | static ssize_t cache_type_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
425 | { | |
426 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
427 | ||
428 | return sprintf(buf, "%s\n", cache->type); | |
429 | } | |
430 | ||
431 | static struct kobj_attribute cache_type_attr = | |
432 | __ATTR(type, 0444, cache_type_show, NULL); | |
433 | ||
434 | static ssize_t cache_level_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
435 | { | |
436 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
437 | ||
438 | return sprintf(buf, "%u\n", cache->level); | |
439 | } | |
440 | ||
441 | static struct kobj_attribute cache_level_attr = | |
442 | __ATTR(level, 0444, cache_level_show, NULL); | |
443 | ||
444 | static ssize_t cache_assoc_show(struct kobject *k, struct kobj_attribute *attr, char *buf) | |
445 | { | |
446 | struct cache_desc *cache = kobj_to_cache_desc(k); | |
447 | ||
448 | return sprintf(buf, "%u\n", cache->associativity); | |
449 | } | |
450 | ||
451 | static struct kobj_attribute cache_assoc_attr = | |
452 | __ATTR(ways_of_associativity, 0444, cache_assoc_show, NULL); | |
453 | ||
454 | struct cache_desc_info { | |
455 | const char *type; | |
456 | const char *size_prop; | |
457 | const char *line_size_prop; | |
458 | const char *nr_sets_prop; | |
459 | }; | |
460 | ||
461 | /* PowerPC Processor binding says the [di]-cache-* must be equal on | |
462 | * unified caches, so just use d-cache properties. */ | |
463 | static struct cache_desc_info ucache_info = { | |
464 | .type = "Unified", | |
465 | .size_prop = "d-cache-size", | |
466 | .line_size_prop = "d-cache-line-size", | |
467 | .nr_sets_prop = "d-cache-sets", | |
468 | }; | |
469 | ||
470 | static struct cache_desc_info dcache_info = { | |
471 | .type = "Data", | |
472 | .size_prop = "d-cache-size", | |
473 | .line_size_prop = "d-cache-line-size", | |
474 | .nr_sets_prop = "d-cache-sets", | |
475 | }; | |
476 | ||
477 | static struct cache_desc_info icache_info = { | |
478 | .type = "Instruction", | |
479 | .size_prop = "i-cache-size", | |
480 | .line_size_prop = "i-cache-line-size", | |
481 | .nr_sets_prop = "i-cache-sets", | |
482 | }; | |
483 | ||
484 | static struct cache_desc * __cpuinit create_cache_desc(struct device_node *np, struct kobject *parent, int index, int level, struct cache_desc_info *info) | |
485 | { | |
486 | const u32 *cache_line_size; | |
487 | struct cache_desc *new; | |
488 | const u32 *cache_size; | |
489 | const u32 *nr_sets; | |
490 | int rc; | |
491 | ||
492 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
493 | if (!new) | |
494 | return NULL; | |
495 | ||
496 | rc = kobject_init_and_add(&new->kobj, &cache_desc_type, parent, | |
497 | "index%d", index); | |
498 | if (rc) | |
499 | goto err; | |
500 | ||
501 | /* type */ | |
502 | new->type = info->type; | |
503 | rc = sysfs_create_file(&new->kobj, &cache_type_attr.attr); | |
504 | WARN_ON(rc); | |
505 | ||
506 | /* level */ | |
507 | new->level = level; | |
508 | rc = sysfs_create_file(&new->kobj, &cache_level_attr.attr); | |
509 | WARN_ON(rc); | |
510 | ||
511 | /* size */ | |
512 | cache_size = of_get_property(np, info->size_prop, NULL); | |
513 | if (cache_size) { | |
514 | new->size = *cache_size / 1024; | |
515 | rc = sysfs_create_file(&new->kobj, | |
516 | &cache_size_attr.attr); | |
517 | WARN_ON(rc); | |
518 | } | |
519 | ||
520 | /* coherency_line_size */ | |
521 | cache_line_size = of_get_property(np, info->line_size_prop, NULL); | |
522 | if (cache_line_size) { | |
523 | new->line_size = *cache_line_size; | |
524 | rc = sysfs_create_file(&new->kobj, | |
525 | &cache_line_size_attr.attr); | |
526 | WARN_ON(rc); | |
527 | } | |
528 | ||
529 | /* number_of_sets */ | |
530 | nr_sets = of_get_property(np, info->nr_sets_prop, NULL); | |
531 | if (nr_sets) { | |
532 | new->nr_sets = *nr_sets; | |
533 | rc = sysfs_create_file(&new->kobj, | |
534 | &cache_nr_sets_attr.attr); | |
535 | WARN_ON(rc); | |
536 | } | |
537 | ||
538 | /* ways_of_associativity */ | |
539 | if (new->nr_sets == 1) { | |
540 | /* fully associative */ | |
541 | new->associativity = 0; | |
542 | goto create_assoc; | |
543 | } | |
544 | ||
545 | if (new->nr_sets && new->size && new->line_size) { | |
546 | /* If we have values for all of these we can derive | |
547 | * the associativity. */ | |
548 | new->associativity = | |
549 | ((new->size * 1024) / new->nr_sets) / new->line_size; | |
550 | create_assoc: | |
551 | rc = sysfs_create_file(&new->kobj, | |
552 | &cache_assoc_attr.attr); | |
553 | WARN_ON(rc); | |
554 | } | |
555 | ||
556 | return new; | |
557 | err: | |
558 | kfree(new); | |
559 | return NULL; | |
560 | } | |
561 | ||
562 | static bool cache_is_unified(struct device_node *np) | |
563 | { | |
564 | return of_get_property(np, "cache-unified", NULL); | |
565 | } | |
566 | ||
567 | static struct cache_desc * __cpuinit create_cache_index_info(struct device_node *np, struct kobject *parent, int index, int level) | |
568 | { | |
569 | const phandle *next_cache_phandle; | |
570 | struct device_node *next_cache; | |
571 | struct cache_desc *new, **end; | |
572 | ||
573 | pr_debug("%s(node = %s, index = %d)\n", __func__, np->full_name, index); | |
574 | ||
575 | if (cache_is_unified(np)) { | |
576 | new = create_cache_desc(np, parent, index, level, | |
577 | &ucache_info); | |
578 | } else { | |
579 | new = create_cache_desc(np, parent, index, level, | |
580 | &dcache_info); | |
581 | if (new) { | |
582 | index++; | |
583 | new->next = create_cache_desc(np, parent, index, level, | |
584 | &icache_info); | |
585 | } | |
586 | } | |
587 | if (!new) | |
588 | return NULL; | |
589 | ||
590 | end = &new->next; | |
591 | while (*end) | |
592 | end = &(*end)->next; | |
593 | ||
594 | next_cache_phandle = of_get_property(np, "l2-cache", NULL); | |
595 | if (!next_cache_phandle) | |
596 | goto out; | |
597 | ||
598 | next_cache = of_find_node_by_phandle(*next_cache_phandle); | |
599 | if (!next_cache) | |
600 | goto out; | |
601 | ||
602 | *end = create_cache_index_info(next_cache, parent, ++index, ++level); | |
603 | ||
604 | of_node_put(next_cache); | |
605 | out: | |
606 | return new; | |
607 | } | |
608 | ||
609 | static void __cpuinit create_cache_info(struct sys_device *sysdev) | |
610 | { | |
611 | struct kobject *cache_toplevel; | |
612 | struct device_node *np = NULL; | |
613 | int cpu = sysdev->id; | |
614 | ||
615 | cache_toplevel = kobject_create_and_add("cache", &sysdev->kobj); | |
616 | if (!cache_toplevel) | |
617 | return; | |
618 | per_cpu(cache_toplevel, cpu) = cache_toplevel; | |
619 | np = of_get_cpu_node(cpu, NULL); | |
620 | if (np != NULL) { | |
621 | per_cpu(cache_desc, cpu) = | |
622 | create_cache_index_info(np, cache_toplevel, 0, 1); | |
623 | of_node_put(np); | |
624 | } | |
625 | return; | |
626 | } | |
1da177e4 | 627 | |
9ba1984e | 628 | static void __cpuinit register_cpu_online(unsigned int cpu) |
1da177e4 LT |
629 | { |
630 | struct cpu *c = &per_cpu(cpu_devices, cpu); | |
631 | struct sys_device *s = &c->sysdev; | |
6529c13d OJ |
632 | struct sysdev_attribute *attrs, *pmc_attrs; |
633 | int i, nattrs; | |
1da177e4 | 634 | |
b950bdd0 | 635 | #ifdef CONFIG_PPC64 |
ad5cb17f SR |
636 | if (!firmware_has_feature(FW_FEATURE_ISERIES) && |
637 | cpu_has_feature(CPU_FTR_SMT)) | |
1da177e4 | 638 | sysdev_create_file(s, &attr_smt_snooze_delay); |
b950bdd0 | 639 | #endif |
1da177e4 LT |
640 | |
641 | /* PMC stuff */ | |
6529c13d | 642 | switch (cur_cpu_spec->pmc_type) { |
b950bdd0 | 643 | #ifdef HAS_PPC_PMC_IBM |
6529c13d OJ |
644 | case PPC_PMC_IBM: |
645 | attrs = ibm_common_attrs; | |
646 | nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); | |
b950bdd0 | 647 | pmc_attrs = classic_pmc_attrs; |
6529c13d | 648 | break; |
b950bdd0 BH |
649 | #endif /* HAS_PPC_PMC_IBM */ |
650 | #ifdef HAS_PPC_PMC_G4 | |
651 | case PPC_PMC_G4: | |
652 | attrs = g4_common_attrs; | |
653 | nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute); | |
654 | pmc_attrs = classic_pmc_attrs; | |
655 | break; | |
656 | #endif /* HAS_PPC_PMC_G4 */ | |
657 | #ifdef HAS_PPC_PMC_PA6T | |
6529c13d OJ |
658 | case PPC_PMC_PA6T: |
659 | /* PA Semi starts counting at PMC0 */ | |
660 | attrs = pa6t_attrs; | |
661 | nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); | |
662 | pmc_attrs = NULL; | |
663 | break; | |
b950bdd0 | 664 | #endif /* HAS_PPC_PMC_PA6T */ |
6529c13d OJ |
665 | default: |
666 | attrs = NULL; | |
667 | nattrs = 0; | |
668 | pmc_attrs = NULL; | |
669 | } | |
670 | ||
671 | for (i = 0; i < nattrs; i++) | |
672 | sysdev_create_file(s, &attrs[i]); | |
1da177e4 | 673 | |
6529c13d OJ |
674 | if (pmc_attrs) |
675 | for (i = 0; i < cur_cpu_spec->num_pmcs; i++) | |
676 | sysdev_create_file(s, &pmc_attrs[i]); | |
1da177e4 | 677 | |
b950bdd0 | 678 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
679 | if (cpu_has_feature(CPU_FTR_MMCRA)) |
680 | sysdev_create_file(s, &attr_mmcra); | |
681 | ||
afd05423 | 682 | if (cpu_has_feature(CPU_FTR_PURR)) |
1da177e4 | 683 | sysdev_create_file(s, &attr_purr); |
4c198557 | 684 | |
f050982a AB |
685 | if (cpu_has_feature(CPU_FTR_SPURR)) |
686 | sysdev_create_file(s, &attr_spurr); | |
687 | ||
4c198557 AB |
688 | if (cpu_has_feature(CPU_FTR_DSCR)) |
689 | sysdev_create_file(s, &attr_dscr); | |
b950bdd0 | 690 | #endif /* CONFIG_PPC64 */ |
124c27d3 NL |
691 | |
692 | create_cache_info(s); | |
1da177e4 LT |
693 | } |
694 | ||
695 | #ifdef CONFIG_HOTPLUG_CPU | |
124c27d3 NL |
696 | static void remove_cache_info(struct sys_device *sysdev) |
697 | { | |
698 | struct kobject *cache_toplevel; | |
699 | struct cache_desc *cache_desc; | |
700 | int cpu = sysdev->id; | |
701 | ||
702 | cache_desc = per_cpu(cache_desc, cpu); | |
f3d3d307 | 703 | if (cache_desc != NULL) |
124c27d3 | 704 | kobject_put(&cache_desc->kobj); |
f3d3d307 | 705 | |
124c27d3 NL |
706 | cache_toplevel = per_cpu(cache_toplevel, cpu); |
707 | if (cache_toplevel != NULL) | |
708 | kobject_put(cache_toplevel); | |
709 | } | |
710 | ||
1da177e4 LT |
711 | static void unregister_cpu_online(unsigned int cpu) |
712 | { | |
713 | struct cpu *c = &per_cpu(cpu_devices, cpu); | |
714 | struct sys_device *s = &c->sysdev; | |
6529c13d OJ |
715 | struct sysdev_attribute *attrs, *pmc_attrs; |
716 | int i, nattrs; | |
1da177e4 | 717 | |
72486f1f | 718 | BUG_ON(!c->hotpluggable); |
1da177e4 | 719 | |
a1e0eb10 | 720 | #ifdef CONFIG_PPC64 |
ad5cb17f SR |
721 | if (!firmware_has_feature(FW_FEATURE_ISERIES) && |
722 | cpu_has_feature(CPU_FTR_SMT)) | |
1da177e4 | 723 | sysdev_remove_file(s, &attr_smt_snooze_delay); |
a1e0eb10 | 724 | #endif |
1da177e4 LT |
725 | |
726 | /* PMC stuff */ | |
6529c13d | 727 | switch (cur_cpu_spec->pmc_type) { |
b950bdd0 | 728 | #ifdef HAS_PPC_PMC_IBM |
6529c13d OJ |
729 | case PPC_PMC_IBM: |
730 | attrs = ibm_common_attrs; | |
731 | nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); | |
b950bdd0 BH |
732 | pmc_attrs = classic_pmc_attrs; |
733 | break; | |
734 | #endif /* HAS_PPC_PMC_IBM */ | |
735 | #ifdef HAS_PPC_PMC_G4 | |
736 | case PPC_PMC_G4: | |
737 | attrs = g4_common_attrs; | |
738 | nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute); | |
739 | pmc_attrs = classic_pmc_attrs; | |
6529c13d | 740 | break; |
b950bdd0 BH |
741 | #endif /* HAS_PPC_PMC_G4 */ |
742 | #ifdef HAS_PPC_PMC_PA6T | |
6529c13d OJ |
743 | case PPC_PMC_PA6T: |
744 | /* PA Semi starts counting at PMC0 */ | |
745 | attrs = pa6t_attrs; | |
746 | nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); | |
747 | pmc_attrs = NULL; | |
748 | break; | |
b950bdd0 | 749 | #endif /* HAS_PPC_PMC_PA6T */ |
6529c13d OJ |
750 | default: |
751 | attrs = NULL; | |
752 | nattrs = 0; | |
753 | pmc_attrs = NULL; | |
754 | } | |
1da177e4 | 755 | |
6529c13d OJ |
756 | for (i = 0; i < nattrs; i++) |
757 | sysdev_remove_file(s, &attrs[i]); | |
758 | ||
759 | if (pmc_attrs) | |
760 | for (i = 0; i < cur_cpu_spec->num_pmcs; i++) | |
761 | sysdev_remove_file(s, &pmc_attrs[i]); | |
1da177e4 | 762 | |
b950bdd0 | 763 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
764 | if (cpu_has_feature(CPU_FTR_MMCRA)) |
765 | sysdev_remove_file(s, &attr_mmcra); | |
766 | ||
afd05423 | 767 | if (cpu_has_feature(CPU_FTR_PURR)) |
1da177e4 | 768 | sysdev_remove_file(s, &attr_purr); |
4c198557 | 769 | |
f050982a AB |
770 | if (cpu_has_feature(CPU_FTR_SPURR)) |
771 | sysdev_remove_file(s, &attr_spurr); | |
772 | ||
4c198557 AB |
773 | if (cpu_has_feature(CPU_FTR_DSCR)) |
774 | sysdev_remove_file(s, &attr_dscr); | |
b950bdd0 | 775 | #endif /* CONFIG_PPC64 */ |
124c27d3 NL |
776 | |
777 | remove_cache_info(s); | |
1da177e4 LT |
778 | } |
779 | #endif /* CONFIG_HOTPLUG_CPU */ | |
780 | ||
8c78f307 | 781 | static int __cpuinit sysfs_cpu_notify(struct notifier_block *self, |
1da177e4 LT |
782 | unsigned long action, void *hcpu) |
783 | { | |
784 | unsigned int cpu = (unsigned int)(long)hcpu; | |
785 | ||
786 | switch (action) { | |
787 | case CPU_ONLINE: | |
8bb78442 | 788 | case CPU_ONLINE_FROZEN: |
1da177e4 LT |
789 | register_cpu_online(cpu); |
790 | break; | |
791 | #ifdef CONFIG_HOTPLUG_CPU | |
792 | case CPU_DEAD: | |
8bb78442 | 793 | case CPU_DEAD_FROZEN: |
1da177e4 LT |
794 | unregister_cpu_online(cpu); |
795 | break; | |
796 | #endif | |
797 | } | |
798 | return NOTIFY_OK; | |
799 | } | |
800 | ||
8c78f307 | 801 | static struct notifier_block __cpuinitdata sysfs_cpu_nb = { |
1da177e4 LT |
802 | .notifier_call = sysfs_cpu_notify, |
803 | }; | |
804 | ||
0344c6c5 CK |
805 | static DEFINE_MUTEX(cpu_mutex); |
806 | ||
807 | int cpu_add_sysdev_attr(struct sysdev_attribute *attr) | |
808 | { | |
809 | int cpu; | |
810 | ||
811 | mutex_lock(&cpu_mutex); | |
812 | ||
813 | for_each_possible_cpu(cpu) { | |
814 | sysdev_create_file(get_cpu_sysdev(cpu), attr); | |
815 | } | |
816 | ||
817 | mutex_unlock(&cpu_mutex); | |
818 | return 0; | |
819 | } | |
820 | EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr); | |
821 | ||
822 | int cpu_add_sysdev_attr_group(struct attribute_group *attrs) | |
823 | { | |
824 | int cpu; | |
825 | struct sys_device *sysdev; | |
6bcc4c01 | 826 | int ret; |
0344c6c5 CK |
827 | |
828 | mutex_lock(&cpu_mutex); | |
829 | ||
830 | for_each_possible_cpu(cpu) { | |
831 | sysdev = get_cpu_sysdev(cpu); | |
6bcc4c01 OJ |
832 | ret = sysfs_create_group(&sysdev->kobj, attrs); |
833 | WARN_ON(ret != 0); | |
0344c6c5 CK |
834 | } |
835 | ||
836 | mutex_unlock(&cpu_mutex); | |
837 | return 0; | |
838 | } | |
839 | EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group); | |
840 | ||
841 | ||
842 | void cpu_remove_sysdev_attr(struct sysdev_attribute *attr) | |
843 | { | |
844 | int cpu; | |
845 | ||
846 | mutex_lock(&cpu_mutex); | |
847 | ||
848 | for_each_possible_cpu(cpu) { | |
849 | sysdev_remove_file(get_cpu_sysdev(cpu), attr); | |
850 | } | |
851 | ||
852 | mutex_unlock(&cpu_mutex); | |
853 | } | |
854 | EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr); | |
855 | ||
856 | void cpu_remove_sysdev_attr_group(struct attribute_group *attrs) | |
857 | { | |
858 | int cpu; | |
859 | struct sys_device *sysdev; | |
860 | ||
861 | mutex_lock(&cpu_mutex); | |
862 | ||
863 | for_each_possible_cpu(cpu) { | |
864 | sysdev = get_cpu_sysdev(cpu); | |
865 | sysfs_remove_group(&sysdev->kobj, attrs); | |
866 | } | |
867 | ||
868 | mutex_unlock(&cpu_mutex); | |
869 | } | |
870 | EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group); | |
871 | ||
872 | ||
1da177e4 LT |
873 | /* NUMA stuff */ |
874 | ||
875 | #ifdef CONFIG_NUMA | |
1da177e4 LT |
876 | static void register_nodes(void) |
877 | { | |
878 | int i; | |
879 | ||
0fc44159 YG |
880 | for (i = 0; i < MAX_NUMNODES; i++) |
881 | register_one_node(i); | |
1da177e4 | 882 | } |
953039c8 JK |
883 | |
884 | int sysfs_add_device_to_node(struct sys_device *dev, int nid) | |
885 | { | |
886 | struct node *node = &node_devices[nid]; | |
887 | return sysfs_create_link(&node->sysdev.kobj, &dev->kobj, | |
888 | kobject_name(&dev->kobj)); | |
889 | } | |
12654f77 | 890 | EXPORT_SYMBOL_GPL(sysfs_add_device_to_node); |
953039c8 JK |
891 | |
892 | void sysfs_remove_device_from_node(struct sys_device *dev, int nid) | |
893 | { | |
894 | struct node *node = &node_devices[nid]; | |
895 | sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj)); | |
896 | } | |
12654f77 | 897 | EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node); |
953039c8 | 898 | |
1da177e4 LT |
899 | #else |
900 | static void register_nodes(void) | |
901 | { | |
902 | return; | |
903 | } | |
953039c8 | 904 | |
1da177e4 LT |
905 | #endif |
906 | ||
907 | /* Only valid if CPU is present. */ | |
00bf6e90 SR |
908 | static ssize_t show_physical_id(struct sys_device *dev, |
909 | struct sysdev_attribute *attr, char *buf) | |
1da177e4 LT |
910 | { |
911 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); | |
912 | ||
913 | return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id)); | |
914 | } | |
915 | static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL); | |
916 | ||
917 | static int __init topology_init(void) | |
918 | { | |
919 | int cpu; | |
1da177e4 LT |
920 | |
921 | register_nodes(); | |
1da177e4 LT |
922 | register_cpu_notifier(&sysfs_cpu_nb); |
923 | ||
0e551954 | 924 | for_each_possible_cpu(cpu) { |
1da177e4 LT |
925 | struct cpu *c = &per_cpu(cpu_devices, cpu); |
926 | ||
1da177e4 LT |
927 | /* |
928 | * For now, we just see if the system supports making | |
929 | * the RTAS calls for CPU hotplug. But, there may be a | |
930 | * more comprehensive way to do this for an individual | |
931 | * CPU. For instance, the boot cpu might never be valid | |
932 | * for hotplugging. | |
933 | */ | |
72486f1f SS |
934 | if (ppc_md.cpu_die) |
935 | c->hotpluggable = 1; | |
1da177e4 | 936 | |
72486f1f | 937 | if (cpu_online(cpu) || c->hotpluggable) { |
76b67ed9 | 938 | register_cpu(c, cpu); |
1da177e4 LT |
939 | |
940 | sysdev_create_file(&c->sysdev, &attr_physical_id); | |
941 | } | |
942 | ||
943 | if (cpu_online(cpu)) | |
944 | register_cpu_online(cpu); | |
945 | } | |
946 | ||
947 | return 0; | |
948 | } | |
e9e77ce8 | 949 | subsys_initcall(topology_init); |