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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 LT |
18 | #include <asm/paca.h> |
19 | #include <asm/lppaca.h> | |
20 | #include <asm/machdep.h> | |
2249ca9d | 21 | #include <asm/smp.h> |
1da177e4 LT |
22 | |
23 | static DEFINE_PER_CPU(struct cpu, cpu_devices); | |
24 | ||
25 | /* SMT stuff */ | |
26 | ||
27 | #ifdef CONFIG_PPC_MULTIPLATFORM | |
0ddd3e7d AB |
28 | /* Time in microseconds we delay before sleeping in the idle loop */ |
29 | DEFINE_PER_CPU(unsigned long, smt_snooze_delay) = { 100 }; | |
1da177e4 LT |
30 | |
31 | static ssize_t store_smt_snooze_delay(struct sys_device *dev, const char *buf, | |
32 | size_t count) | |
33 | { | |
34 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); | |
35 | ssize_t ret; | |
36 | unsigned long snooze; | |
37 | ||
38 | ret = sscanf(buf, "%lu", &snooze); | |
39 | if (ret != 1) | |
40 | return -EINVAL; | |
41 | ||
42 | per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze; | |
43 | ||
44 | return count; | |
45 | } | |
46 | ||
47 | static ssize_t show_smt_snooze_delay(struct sys_device *dev, char *buf) | |
48 | { | |
49 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); | |
50 | ||
51 | return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id)); | |
52 | } | |
53 | ||
54 | static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay, | |
55 | store_smt_snooze_delay); | |
56 | ||
57 | /* Only parse OF options if the matching cmdline option was not specified */ | |
58 | static int smt_snooze_cmdline; | |
59 | ||
60 | static int __init smt_setup(void) | |
61 | { | |
62 | struct device_node *options; | |
a7f67bdf | 63 | const unsigned int *val; |
1da177e4 LT |
64 | unsigned int cpu; |
65 | ||
66 | if (!cpu_has_feature(CPU_FTR_SMT)) | |
69ed3324 | 67 | return -ENODEV; |
1da177e4 | 68 | |
8c8dc322 | 69 | options = of_find_node_by_path("/options"); |
1da177e4 | 70 | if (!options) |
69ed3324 | 71 | return -ENODEV; |
1da177e4 | 72 | |
e2eb6392 | 73 | val = of_get_property(options, "ibm,smt-snooze-delay", NULL); |
1da177e4 | 74 | if (!smt_snooze_cmdline && val) { |
0e551954 | 75 | for_each_possible_cpu(cpu) |
1da177e4 LT |
76 | per_cpu(smt_snooze_delay, cpu) = *val; |
77 | } | |
78 | ||
8c8dc322 | 79 | of_node_put(options); |
69ed3324 | 80 | return 0; |
1da177e4 LT |
81 | } |
82 | __initcall(smt_setup); | |
83 | ||
84 | static int __init setup_smt_snooze_delay(char *str) | |
85 | { | |
86 | unsigned int cpu; | |
87 | int snooze; | |
88 | ||
89 | if (!cpu_has_feature(CPU_FTR_SMT)) | |
90 | return 1; | |
91 | ||
92 | smt_snooze_cmdline = 1; | |
93 | ||
94 | if (get_option(&str, &snooze)) { | |
0e551954 | 95 | for_each_possible_cpu(cpu) |
1da177e4 LT |
96 | per_cpu(smt_snooze_delay, cpu) = snooze; |
97 | } | |
98 | ||
99 | return 1; | |
100 | } | |
101 | __setup("smt-snooze-delay=", setup_smt_snooze_delay); | |
102 | ||
180a3362 ME |
103 | #endif /* CONFIG_PPC_MULTIPLATFORM */ |
104 | ||
1da177e4 LT |
105 | /* |
106 | * Enabling PMCs will slow partition context switch times so we only do | |
107 | * it the first time we write to the PMCs. | |
108 | */ | |
109 | ||
110 | static DEFINE_PER_CPU(char, pmcs_enabled); | |
111 | ||
112 | void ppc64_enable_pmcs(void) | |
113 | { | |
1da177e4 LT |
114 | /* Only need to enable them once */ |
115 | if (__get_cpu_var(pmcs_enabled)) | |
116 | return; | |
117 | ||
118 | __get_cpu_var(pmcs_enabled) = 1; | |
119 | ||
180a3362 ME |
120 | if (ppc_md.enable_pmcs) |
121 | ppc_md.enable_pmcs(); | |
1da177e4 | 122 | } |
1da177e4 LT |
123 | EXPORT_SYMBOL(ppc64_enable_pmcs); |
124 | ||
125 | /* XXX convert to rusty's on_one_cpu */ | |
126 | static unsigned long run_on_cpu(unsigned long cpu, | |
127 | unsigned long (*func)(unsigned long), | |
128 | unsigned long arg) | |
129 | { | |
130 | cpumask_t old_affinity = current->cpus_allowed; | |
131 | unsigned long ret; | |
132 | ||
133 | /* should return -EINVAL to userspace */ | |
134 | if (set_cpus_allowed(current, cpumask_of_cpu(cpu))) | |
135 | return 0; | |
136 | ||
137 | ret = func(arg); | |
138 | ||
139 | set_cpus_allowed(current, old_affinity); | |
140 | ||
141 | return ret; | |
142 | } | |
143 | ||
144 | #define SYSFS_PMCSETUP(NAME, ADDRESS) \ | |
145 | static unsigned long read_##NAME(unsigned long junk) \ | |
146 | { \ | |
147 | return mfspr(ADDRESS); \ | |
148 | } \ | |
149 | static unsigned long write_##NAME(unsigned long val) \ | |
150 | { \ | |
151 | ppc64_enable_pmcs(); \ | |
152 | mtspr(ADDRESS, val); \ | |
153 | return 0; \ | |
154 | } \ | |
155 | static ssize_t show_##NAME(struct sys_device *dev, char *buf) \ | |
156 | { \ | |
157 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ | |
158 | unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \ | |
159 | return sprintf(buf, "%lx\n", val); \ | |
160 | } \ | |
3ff6eecc | 161 | static ssize_t __used \ |
1da177e4 LT |
162 | store_##NAME(struct sys_device *dev, const char *buf, size_t count) \ |
163 | { \ | |
164 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); \ | |
165 | unsigned long val; \ | |
166 | int ret = sscanf(buf, "%lx", &val); \ | |
167 | if (ret != 1) \ | |
168 | return -EINVAL; \ | |
169 | run_on_cpu(cpu->sysdev.id, write_##NAME, val); \ | |
170 | return count; \ | |
171 | } | |
172 | ||
6529c13d OJ |
173 | |
174 | /* Let's define all possible registers, we'll only hook up the ones | |
175 | * that are implemented on the current processor | |
176 | */ | |
177 | ||
1da177e4 LT |
178 | SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0); |
179 | SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1); | |
180 | SYSFS_PMCSETUP(mmcra, SPRN_MMCRA); | |
181 | SYSFS_PMCSETUP(pmc1, SPRN_PMC1); | |
182 | SYSFS_PMCSETUP(pmc2, SPRN_PMC2); | |
183 | SYSFS_PMCSETUP(pmc3, SPRN_PMC3); | |
184 | SYSFS_PMCSETUP(pmc4, SPRN_PMC4); | |
185 | SYSFS_PMCSETUP(pmc5, SPRN_PMC5); | |
186 | SYSFS_PMCSETUP(pmc6, SPRN_PMC6); | |
187 | SYSFS_PMCSETUP(pmc7, SPRN_PMC7); | |
188 | SYSFS_PMCSETUP(pmc8, SPRN_PMC8); | |
189 | SYSFS_PMCSETUP(purr, SPRN_PURR); | |
f050982a | 190 | SYSFS_PMCSETUP(spurr, SPRN_SPURR); |
4c198557 | 191 | SYSFS_PMCSETUP(dscr, SPRN_DSCR); |
1da177e4 | 192 | |
25fc530e OJ |
193 | SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0); |
194 | SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1); | |
195 | SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2); | |
196 | SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3); | |
197 | SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4); | |
198 | SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5); | |
6529c13d | 199 | |
2e1957fd OJ |
200 | #ifdef CONFIG_DEBUG_KERNEL |
201 | SYSFS_PMCSETUP(hid0, SPRN_HID0); | |
202 | SYSFS_PMCSETUP(hid1, SPRN_HID1); | |
203 | SYSFS_PMCSETUP(hid4, SPRN_HID4); | |
204 | SYSFS_PMCSETUP(hid5, SPRN_HID5); | |
205 | SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0); | |
206 | SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1); | |
207 | SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2); | |
208 | SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3); | |
209 | SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4); | |
210 | SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5); | |
211 | SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6); | |
212 | SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7); | |
213 | SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8); | |
214 | SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9); | |
215 | SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT); | |
216 | SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR); | |
217 | SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR); | |
218 | SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR); | |
219 | SYSFS_PMCSETUP(der, SPRN_PA6T_DER); | |
220 | SYSFS_PMCSETUP(mer, SPRN_PA6T_MER); | |
221 | SYSFS_PMCSETUP(ber, SPRN_PA6T_BER); | |
222 | SYSFS_PMCSETUP(ier, SPRN_PA6T_IER); | |
223 | SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER); | |
224 | SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR); | |
225 | SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0); | |
226 | SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1); | |
227 | SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2); | |
228 | SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3); | |
229 | #endif /* CONFIG_DEBUG_KERNEL */ | |
6529c13d | 230 | |
1da177e4 | 231 | static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra); |
f050982a | 232 | static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL); |
4c198557 | 233 | static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr); |
6529c13d OJ |
234 | static SYSDEV_ATTR(purr, 0600, show_purr, store_purr); |
235 | ||
236 | static struct sysdev_attribute ibm_common_attrs[] = { | |
237 | _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), | |
238 | _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), | |
239 | }; | |
240 | ||
241 | static struct sysdev_attribute ibm_pmc_attrs[] = { | |
242 | _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1), | |
243 | _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2), | |
244 | _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3), | |
245 | _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4), | |
246 | _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5), | |
247 | _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6), | |
248 | _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7), | |
249 | _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8), | |
250 | }; | |
251 | ||
252 | static struct sysdev_attribute pa6t_attrs[] = { | |
253 | _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0), | |
254 | _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1), | |
255 | _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0), | |
256 | _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1), | |
257 | _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2), | |
258 | _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3), | |
259 | _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4), | |
260 | _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5), | |
2e1957fd OJ |
261 | #ifdef CONFIG_DEBUG_KERNEL |
262 | _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0), | |
263 | _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1), | |
264 | _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4), | |
265 | _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5), | |
266 | _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0), | |
267 | _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1), | |
268 | _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2), | |
269 | _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3), | |
270 | _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4), | |
271 | _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5), | |
272 | _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6), | |
273 | _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7), | |
274 | _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8), | |
275 | _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9), | |
276 | _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat), | |
277 | _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr), | |
278 | _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr), | |
279 | _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr), | |
280 | _SYSDEV_ATTR(der, 0600, show_der, store_der), | |
281 | _SYSDEV_ATTR(mer, 0600, show_mer, store_mer), | |
282 | _SYSDEV_ATTR(ber, 0600, show_ber, store_ber), | |
283 | _SYSDEV_ATTR(ier, 0600, show_ier, store_ier), | |
284 | _SYSDEV_ATTR(sier, 0600, show_sier, store_sier), | |
285 | _SYSDEV_ATTR(siar, 0600, show_siar, store_siar), | |
286 | _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0), | |
287 | _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1), | |
288 | _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2), | |
289 | _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3), | |
290 | #endif /* CONFIG_DEBUG_KERNEL */ | |
6529c13d OJ |
291 | }; |
292 | ||
1da177e4 LT |
293 | |
294 | static void register_cpu_online(unsigned int cpu) | |
295 | { | |
296 | struct cpu *c = &per_cpu(cpu_devices, cpu); | |
297 | struct sys_device *s = &c->sysdev; | |
6529c13d OJ |
298 | struct sysdev_attribute *attrs, *pmc_attrs; |
299 | int i, nattrs; | |
1da177e4 | 300 | |
ad5cb17f SR |
301 | if (!firmware_has_feature(FW_FEATURE_ISERIES) && |
302 | cpu_has_feature(CPU_FTR_SMT)) | |
1da177e4 | 303 | sysdev_create_file(s, &attr_smt_snooze_delay); |
1da177e4 LT |
304 | |
305 | /* PMC stuff */ | |
6529c13d OJ |
306 | switch (cur_cpu_spec->pmc_type) { |
307 | case PPC_PMC_IBM: | |
308 | attrs = ibm_common_attrs; | |
309 | nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); | |
310 | pmc_attrs = ibm_pmc_attrs; | |
311 | break; | |
312 | case PPC_PMC_PA6T: | |
313 | /* PA Semi starts counting at PMC0 */ | |
314 | attrs = pa6t_attrs; | |
315 | nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); | |
316 | pmc_attrs = NULL; | |
317 | break; | |
318 | default: | |
319 | attrs = NULL; | |
320 | nattrs = 0; | |
321 | pmc_attrs = NULL; | |
322 | } | |
323 | ||
324 | for (i = 0; i < nattrs; i++) | |
325 | sysdev_create_file(s, &attrs[i]); | |
1da177e4 | 326 | |
6529c13d OJ |
327 | if (pmc_attrs) |
328 | for (i = 0; i < cur_cpu_spec->num_pmcs; i++) | |
329 | sysdev_create_file(s, &pmc_attrs[i]); | |
1da177e4 LT |
330 | |
331 | if (cpu_has_feature(CPU_FTR_MMCRA)) | |
332 | sysdev_create_file(s, &attr_mmcra); | |
333 | ||
afd05423 | 334 | if (cpu_has_feature(CPU_FTR_PURR)) |
1da177e4 | 335 | sysdev_create_file(s, &attr_purr); |
4c198557 | 336 | |
f050982a AB |
337 | if (cpu_has_feature(CPU_FTR_SPURR)) |
338 | sysdev_create_file(s, &attr_spurr); | |
339 | ||
4c198557 AB |
340 | if (cpu_has_feature(CPU_FTR_DSCR)) |
341 | sysdev_create_file(s, &attr_dscr); | |
1da177e4 LT |
342 | } |
343 | ||
344 | #ifdef CONFIG_HOTPLUG_CPU | |
345 | static void unregister_cpu_online(unsigned int cpu) | |
346 | { | |
347 | struct cpu *c = &per_cpu(cpu_devices, cpu); | |
348 | struct sys_device *s = &c->sysdev; | |
6529c13d OJ |
349 | struct sysdev_attribute *attrs, *pmc_attrs; |
350 | int i, nattrs; | |
1da177e4 | 351 | |
72486f1f | 352 | BUG_ON(!c->hotpluggable); |
1da177e4 | 353 | |
ad5cb17f SR |
354 | if (!firmware_has_feature(FW_FEATURE_ISERIES) && |
355 | cpu_has_feature(CPU_FTR_SMT)) | |
1da177e4 | 356 | sysdev_remove_file(s, &attr_smt_snooze_delay); |
1da177e4 LT |
357 | |
358 | /* PMC stuff */ | |
6529c13d OJ |
359 | switch (cur_cpu_spec->pmc_type) { |
360 | case PPC_PMC_IBM: | |
361 | attrs = ibm_common_attrs; | |
362 | nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute); | |
363 | pmc_attrs = ibm_pmc_attrs; | |
364 | break; | |
365 | case PPC_PMC_PA6T: | |
366 | /* PA Semi starts counting at PMC0 */ | |
367 | attrs = pa6t_attrs; | |
368 | nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute); | |
369 | pmc_attrs = NULL; | |
370 | break; | |
371 | default: | |
372 | attrs = NULL; | |
373 | nattrs = 0; | |
374 | pmc_attrs = NULL; | |
375 | } | |
1da177e4 | 376 | |
6529c13d OJ |
377 | for (i = 0; i < nattrs; i++) |
378 | sysdev_remove_file(s, &attrs[i]); | |
379 | ||
380 | if (pmc_attrs) | |
381 | for (i = 0; i < cur_cpu_spec->num_pmcs; i++) | |
382 | sysdev_remove_file(s, &pmc_attrs[i]); | |
1da177e4 LT |
383 | |
384 | if (cpu_has_feature(CPU_FTR_MMCRA)) | |
385 | sysdev_remove_file(s, &attr_mmcra); | |
386 | ||
afd05423 | 387 | if (cpu_has_feature(CPU_FTR_PURR)) |
1da177e4 | 388 | sysdev_remove_file(s, &attr_purr); |
4c198557 | 389 | |
f050982a AB |
390 | if (cpu_has_feature(CPU_FTR_SPURR)) |
391 | sysdev_remove_file(s, &attr_spurr); | |
392 | ||
4c198557 AB |
393 | if (cpu_has_feature(CPU_FTR_DSCR)) |
394 | sysdev_remove_file(s, &attr_dscr); | |
1da177e4 LT |
395 | } |
396 | #endif /* CONFIG_HOTPLUG_CPU */ | |
397 | ||
8c78f307 | 398 | static int __cpuinit sysfs_cpu_notify(struct notifier_block *self, |
1da177e4 LT |
399 | unsigned long action, void *hcpu) |
400 | { | |
401 | unsigned int cpu = (unsigned int)(long)hcpu; | |
402 | ||
403 | switch (action) { | |
404 | case CPU_ONLINE: | |
8bb78442 | 405 | case CPU_ONLINE_FROZEN: |
1da177e4 LT |
406 | register_cpu_online(cpu); |
407 | break; | |
408 | #ifdef CONFIG_HOTPLUG_CPU | |
409 | case CPU_DEAD: | |
8bb78442 | 410 | case CPU_DEAD_FROZEN: |
1da177e4 LT |
411 | unregister_cpu_online(cpu); |
412 | break; | |
413 | #endif | |
414 | } | |
415 | return NOTIFY_OK; | |
416 | } | |
417 | ||
8c78f307 | 418 | static struct notifier_block __cpuinitdata sysfs_cpu_nb = { |
1da177e4 LT |
419 | .notifier_call = sysfs_cpu_notify, |
420 | }; | |
421 | ||
0344c6c5 CK |
422 | static DEFINE_MUTEX(cpu_mutex); |
423 | ||
424 | int cpu_add_sysdev_attr(struct sysdev_attribute *attr) | |
425 | { | |
426 | int cpu; | |
427 | ||
428 | mutex_lock(&cpu_mutex); | |
429 | ||
430 | for_each_possible_cpu(cpu) { | |
431 | sysdev_create_file(get_cpu_sysdev(cpu), attr); | |
432 | } | |
433 | ||
434 | mutex_unlock(&cpu_mutex); | |
435 | return 0; | |
436 | } | |
437 | EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr); | |
438 | ||
439 | int cpu_add_sysdev_attr_group(struct attribute_group *attrs) | |
440 | { | |
441 | int cpu; | |
442 | struct sys_device *sysdev; | |
6bcc4c01 | 443 | int ret; |
0344c6c5 CK |
444 | |
445 | mutex_lock(&cpu_mutex); | |
446 | ||
447 | for_each_possible_cpu(cpu) { | |
448 | sysdev = get_cpu_sysdev(cpu); | |
6bcc4c01 OJ |
449 | ret = sysfs_create_group(&sysdev->kobj, attrs); |
450 | WARN_ON(ret != 0); | |
0344c6c5 CK |
451 | } |
452 | ||
453 | mutex_unlock(&cpu_mutex); | |
454 | return 0; | |
455 | } | |
456 | EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group); | |
457 | ||
458 | ||
459 | void cpu_remove_sysdev_attr(struct sysdev_attribute *attr) | |
460 | { | |
461 | int cpu; | |
462 | ||
463 | mutex_lock(&cpu_mutex); | |
464 | ||
465 | for_each_possible_cpu(cpu) { | |
466 | sysdev_remove_file(get_cpu_sysdev(cpu), attr); | |
467 | } | |
468 | ||
469 | mutex_unlock(&cpu_mutex); | |
470 | } | |
471 | EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr); | |
472 | ||
473 | void cpu_remove_sysdev_attr_group(struct attribute_group *attrs) | |
474 | { | |
475 | int cpu; | |
476 | struct sys_device *sysdev; | |
477 | ||
478 | mutex_lock(&cpu_mutex); | |
479 | ||
480 | for_each_possible_cpu(cpu) { | |
481 | sysdev = get_cpu_sysdev(cpu); | |
482 | sysfs_remove_group(&sysdev->kobj, attrs); | |
483 | } | |
484 | ||
485 | mutex_unlock(&cpu_mutex); | |
486 | } | |
487 | EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group); | |
488 | ||
489 | ||
1da177e4 LT |
490 | /* NUMA stuff */ |
491 | ||
492 | #ifdef CONFIG_NUMA | |
1da177e4 LT |
493 | static void register_nodes(void) |
494 | { | |
495 | int i; | |
496 | ||
0fc44159 YG |
497 | for (i = 0; i < MAX_NUMNODES; i++) |
498 | register_one_node(i); | |
1da177e4 | 499 | } |
953039c8 JK |
500 | |
501 | int sysfs_add_device_to_node(struct sys_device *dev, int nid) | |
502 | { | |
503 | struct node *node = &node_devices[nid]; | |
504 | return sysfs_create_link(&node->sysdev.kobj, &dev->kobj, | |
505 | kobject_name(&dev->kobj)); | |
506 | } | |
12654f77 | 507 | EXPORT_SYMBOL_GPL(sysfs_add_device_to_node); |
953039c8 JK |
508 | |
509 | void sysfs_remove_device_from_node(struct sys_device *dev, int nid) | |
510 | { | |
511 | struct node *node = &node_devices[nid]; | |
512 | sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj)); | |
513 | } | |
12654f77 | 514 | EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node); |
953039c8 | 515 | |
1da177e4 LT |
516 | #else |
517 | static void register_nodes(void) | |
518 | { | |
519 | return; | |
520 | } | |
953039c8 | 521 | |
1da177e4 LT |
522 | #endif |
523 | ||
524 | /* Only valid if CPU is present. */ | |
525 | static ssize_t show_physical_id(struct sys_device *dev, char *buf) | |
526 | { | |
527 | struct cpu *cpu = container_of(dev, struct cpu, sysdev); | |
528 | ||
529 | return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id)); | |
530 | } | |
531 | static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL); | |
532 | ||
533 | static int __init topology_init(void) | |
534 | { | |
535 | int cpu; | |
1da177e4 LT |
536 | |
537 | register_nodes(); | |
1da177e4 LT |
538 | register_cpu_notifier(&sysfs_cpu_nb); |
539 | ||
0e551954 | 540 | for_each_possible_cpu(cpu) { |
1da177e4 LT |
541 | struct cpu *c = &per_cpu(cpu_devices, cpu); |
542 | ||
1da177e4 LT |
543 | /* |
544 | * For now, we just see if the system supports making | |
545 | * the RTAS calls for CPU hotplug. But, there may be a | |
546 | * more comprehensive way to do this for an individual | |
547 | * CPU. For instance, the boot cpu might never be valid | |
548 | * for hotplugging. | |
549 | */ | |
72486f1f SS |
550 | if (ppc_md.cpu_die) |
551 | c->hotpluggable = 1; | |
1da177e4 | 552 | |
72486f1f | 553 | if (cpu_online(cpu) || c->hotpluggable) { |
76b67ed9 | 554 | register_cpu(c, cpu); |
1da177e4 LT |
555 | |
556 | sysdev_create_file(&c->sysdev, &attr_physical_id); | |
557 | } | |
558 | ||
559 | if (cpu_online(cpu)) | |
560 | register_cpu_online(cpu); | |
561 | } | |
562 | ||
563 | return 0; | |
564 | } | |
e9e77ce8 | 565 | subsys_initcall(topology_init); |