1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * PowerPC64 LPAR Configuration Information Driver
4 *
5 * Dave Engebretsen engebret@us.ibm.com
6 * Copyright (c) 2003 Dave Engebretsen
7 * Will Schmidt willschm@us.ibm.com
8 * SPLPAR updates, Copyright (c) 2003 Will Schmidt IBM Corporation.
9 * seq_file updates, Copyright (c) 2004 Will Schmidt IBM Corporation.
10 * Nathan Lynch nathanl@austin.ibm.com
11 * Added lparcfg_write, Copyright (C) 2004 Nathan Lynch IBM Corporation.
12 *
13 * This driver creates a proc file at /proc/ppc64/lparcfg which contains
14 * keyword - value pairs that specify the configuration of the partition.
15 */
16
17 #include <linux/module.h>
18 #include <linux/types.h>
19 #include <linux/errno.h>
20 #include <linux/proc_fs.h>
21 #include <linux/init.h>
22 #include <linux/seq_file.h>
23 #include <linux/slab.h>
24 #include <linux/uaccess.h>
25 #include <linux/hugetlb.h>
26 #include <asm/lppaca.h>
27 #include <asm/hvcall.h>
28 #include <asm/firmware.h>
29 #include <asm/rtas.h>
30 #include <asm/time.h>
31 #include <asm/vdso_datapage.h>
32 #include <asm/vio.h>
33 #include <asm/mmu.h>
34 #include <asm/machdep.h>
35 #include <asm/drmem.h>
36
37 #include "pseries.h"
38 #include "vas.h" /* pseries_vas_dlpar_cpu() */
39
40 /*
41 * This isn't a module but we expose that to userspace
42 * via /proc so leave the definitions here
43 */
44 #define MODULE_VERS "1.9"
45 #define MODULE_NAME "lparcfg"
46
47 /* #define LPARCFG_DEBUG */
48
49 /*
50 * Track sum of all purrs across all processors. This is used to further
51 * calculate usage values by different applications
52 */
cpu_get_purr(void * arg)53 static void cpu_get_purr(void *arg)
54 {
55 atomic64_t *sum = arg;
56
57 atomic64_add(mfspr(SPRN_PURR), sum);
58 }
59
get_purr(void)60 static unsigned long get_purr(void)
61 {
62 atomic64_t purr = ATOMIC64_INIT(0);
63
64 on_each_cpu(cpu_get_purr, &purr, 1);
65
66 return atomic64_read(&purr);
67 }
68
69 /*
70 * Methods used to fetch LPAR data when running on a pSeries platform.
71 */
72
73 struct hvcall_ppp_data {
74 u64 entitlement;
75 u64 unallocated_entitlement;
76 u16 group_num;
77 u16 pool_num;
78 u8 capped;
79 u8 weight;
80 u8 unallocated_weight;
81 u16 active_procs_in_pool;
82 u16 active_system_procs;
83 u16 phys_platform_procs;
84 u32 max_proc_cap_avail;
85 u32 entitled_proc_cap_avail;
86 };
87
88 /*
89 * H_GET_PPP hcall returns info in 4 parms.
90 * entitled_capacity,unallocated_capacity,
91 * aggregation, resource_capability).
92 *
93 * R4 = Entitled Processor Capacity Percentage.
94 * R5 = Unallocated Processor Capacity Percentage.
95 * R6 (AABBCCDDEEFFGGHH).
96 * XXXX - reserved (0)
97 * XXXX - reserved (0)
98 * XXXX - Group Number
99 * XXXX - Pool Number.
100 * R7 (IIJJKKLLMMNNOOPP).
101 * XX - reserved. (0)
102 * XX - bit 0-6 reserved (0). bit 7 is Capped indicator.
103 * XX - variable processor Capacity Weight
104 * XX - Unallocated Variable Processor Capacity Weight.
105 * XXXX - Active processors in Physical Processor Pool.
106 * XXXX - Processors active on platform.
107 * R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1
108 * XXXX - Physical platform procs allocated to virtualization.
109 * XXXXXX - Max procs capacity % available to the partitions pool.
110 * XXXXXX - Entitled procs capacity % available to the
111 * partitions pool.
112 */
h_get_ppp(struct hvcall_ppp_data * ppp_data)113 static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
114 {
115 unsigned long rc;
116 unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
117
118 rc = plpar_hcall9(H_GET_PPP, retbuf);
119
120 ppp_data->entitlement = retbuf[0];
121 ppp_data->unallocated_entitlement = retbuf[1];
122
123 ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
124 ppp_data->pool_num = retbuf[2] & 0xffff;
125
126 ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
127 ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
128 ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
129 ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
130 ppp_data->active_system_procs = retbuf[3] & 0xffff;
131
132 ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8;
133 ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff;
134 ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff;
135
136 return rc;
137 }
138
show_gpci_data(struct seq_file * m)139 static void show_gpci_data(struct seq_file *m)
140 {
141 struct hv_gpci_request_buffer *buf;
142 unsigned int affinity_score;
143 long ret;
144
145 buf = kmalloc(sizeof(*buf), GFP_KERNEL);
146 if (buf == NULL)
147 return;
148
149 /*
150 * Show the local LPAR's affinity score.
151 *
152 * 0xB1 selects the Affinity_Domain_Info_By_Partition subcall.
153 * The score is at byte 0xB in the output buffer.
154 */
155 memset(&buf->params, 0, sizeof(buf->params));
156 buf->params.counter_request = cpu_to_be32(0xB1);
157 buf->params.starting_index = cpu_to_be32(-1); /* local LPAR */
158 buf->params.counter_info_version_in = 0x5; /* v5+ for score */
159 ret = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, virt_to_phys(buf),
160 sizeof(*buf));
161 if (ret != H_SUCCESS) {
162 pr_debug("hcall failed: H_GET_PERF_COUNTER_INFO: %ld, %x\n",
163 ret, be32_to_cpu(buf->params.detail_rc));
164 goto out;
165 }
166 affinity_score = buf->bytes[0xB];
167 seq_printf(m, "partition_affinity_score=%u\n", affinity_score);
168 out:
169 kfree(buf);
170 }
171
h_pic(unsigned long * pool_idle_time,unsigned long * num_procs)172 static unsigned h_pic(unsigned long *pool_idle_time,
173 unsigned long *num_procs)
174 {
175 unsigned long rc;
176 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
177
178 rc = plpar_hcall(H_PIC, retbuf);
179
180 *pool_idle_time = retbuf[0];
181 *num_procs = retbuf[1];
182
183 return rc;
184 }
185
186 /*
187 * parse_ppp_data
188 * Parse out the data returned from h_get_ppp and h_pic
189 */
parse_ppp_data(struct seq_file * m)190 static void parse_ppp_data(struct seq_file *m)
191 {
192 struct hvcall_ppp_data ppp_data;
193 struct device_node *root;
194 const __be32 *perf_level;
195 int rc;
196
197 rc = h_get_ppp(&ppp_data);
198 if (rc)
199 return;
200
201 seq_printf(m, "partition_entitled_capacity=%lld\n",
202 ppp_data.entitlement);
203 seq_printf(m, "group=%d\n", ppp_data.group_num);
204 seq_printf(m, "system_active_processors=%d\n",
205 ppp_data.active_system_procs);
206
207 /* pool related entries are appropriate for shared configs */
208 if (lppaca_shared_proc(get_lppaca())) {
209 unsigned long pool_idle_time, pool_procs;
210
211 seq_printf(m, "pool=%d\n", ppp_data.pool_num);
212
213 /* report pool_capacity in percentage */
214 seq_printf(m, "pool_capacity=%d\n",
215 ppp_data.active_procs_in_pool * 100);
216
217 h_pic(&pool_idle_time, &pool_procs);
218 seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
219 seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
220 }
221
222 seq_printf(m, "unallocated_capacity_weight=%d\n",
223 ppp_data.unallocated_weight);
224 seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
225 seq_printf(m, "capped=%d\n", ppp_data.capped);
226 seq_printf(m, "unallocated_capacity=%lld\n",
227 ppp_data.unallocated_entitlement);
228
229 /* The last bits of information returned from h_get_ppp are only
230 * valid if the ibm,partition-performance-parameters-level
231 * property is >= 1.
232 */
233 root = of_find_node_by_path("/");
234 if (root) {
235 perf_level = of_get_property(root,
236 "ibm,partition-performance-parameters-level",
237 NULL);
238 if (perf_level && (be32_to_cpup(perf_level) >= 1)) {
239 seq_printf(m,
240 "physical_procs_allocated_to_virtualization=%d\n",
241 ppp_data.phys_platform_procs);
242 seq_printf(m, "max_proc_capacity_available=%d\n",
243 ppp_data.max_proc_cap_avail);
244 seq_printf(m, "entitled_proc_capacity_available=%d\n",
245 ppp_data.entitled_proc_cap_avail);
246 }
247
248 of_node_put(root);
249 }
250 }
251
252 /**
253 * parse_mpp_data
254 * Parse out data returned from h_get_mpp
255 */
parse_mpp_data(struct seq_file * m)256 static void parse_mpp_data(struct seq_file *m)
257 {
258 struct hvcall_mpp_data mpp_data;
259 int rc;
260
261 rc = h_get_mpp(&mpp_data);
262 if (rc)
263 return;
264
265 seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
266
267 if (mpp_data.mapped_mem != -1)
268 seq_printf(m, "mapped_entitled_memory=%ld\n",
269 mpp_data.mapped_mem);
270
271 seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
272 seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
273
274 seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
275 seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
276 mpp_data.unallocated_mem_weight);
277 seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
278 mpp_data.unallocated_entitlement);
279
280 if (mpp_data.pool_size != -1)
281 seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
282 mpp_data.pool_size);
283
284 seq_printf(m, "entitled_memory_loan_request=%ld\n",
285 mpp_data.loan_request);
286
287 seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
288 }
289
290 /**
291 * parse_mpp_x_data
292 * Parse out data returned from h_get_mpp_x
293 */
parse_mpp_x_data(struct seq_file * m)294 static void parse_mpp_x_data(struct seq_file *m)
295 {
296 struct hvcall_mpp_x_data mpp_x_data;
297
298 if (!firmware_has_feature(FW_FEATURE_XCMO))
299 return;
300 if (h_get_mpp_x(&mpp_x_data))
301 return;
302
303 seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes);
304
305 if (mpp_x_data.pool_coalesced_bytes)
306 seq_printf(m, "pool_coalesced_bytes=%ld\n",
307 mpp_x_data.pool_coalesced_bytes);
308 if (mpp_x_data.pool_purr_cycles)
309 seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles);
310 if (mpp_x_data.pool_spurr_cycles)
311 seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles);
312 }
313
314 /*
315 * PAPR defines, in section "7.3.16 System Parameters Option", the token 55 to
316 * read the LPAR name, and the largest output data to 4000 + 2 bytes length.
317 */
318 #define SPLPAR_LPAR_NAME_TOKEN 55
319 #define GET_SYS_PARM_BUF_SIZE 4002
320 #if GET_SYS_PARM_BUF_SIZE > RTAS_DATA_BUF_SIZE
321 #error "GET_SYS_PARM_BUF_SIZE is larger than RTAS_DATA_BUF_SIZE"
322 #endif
323
324 /*
325 * Read the lpar name using the RTAS ibm,get-system-parameter call.
326 *
327 * The name read through this call is updated if changes are made by the end
328 * user on the hypervisor side.
329 *
330 * Some hypervisor (like Qemu) may not provide this value. In that case, a non
331 * null value is returned.
332 */
read_rtas_lpar_name(struct seq_file * m)333 static int read_rtas_lpar_name(struct seq_file *m)
334 {
335 int rc, len, token;
336 union {
337 char raw_buffer[GET_SYS_PARM_BUF_SIZE];
338 struct {
339 __be16 len;
340 char name[GET_SYS_PARM_BUF_SIZE-2];
341 };
342 } *local_buffer;
343
344 token = rtas_token("ibm,get-system-parameter");
345 if (token == RTAS_UNKNOWN_SERVICE)
346 return -EINVAL;
347
348 local_buffer = kmalloc(sizeof(*local_buffer), GFP_KERNEL);
349 if (!local_buffer)
350 return -ENOMEM;
351
352 do {
353 spin_lock(&rtas_data_buf_lock);
354 memset(rtas_data_buf, 0, sizeof(*local_buffer));
355 rc = rtas_call(token, 3, 1, NULL, SPLPAR_LPAR_NAME_TOKEN,
356 __pa(rtas_data_buf), sizeof(*local_buffer));
357 if (!rc)
358 memcpy(local_buffer->raw_buffer, rtas_data_buf,
359 sizeof(local_buffer->raw_buffer));
360 spin_unlock(&rtas_data_buf_lock);
361 } while (rtas_busy_delay(rc));
362
363 if (!rc) {
364 /* Force end of string */
365 len = min((int) be16_to_cpu(local_buffer->len),
366 (int) sizeof(local_buffer->name)-1);
367 local_buffer->name[len] = '\0';
368
369 seq_printf(m, "partition_name=%s\n", local_buffer->name);
370 } else
371 rc = -ENODATA;
372
373 kfree(local_buffer);
374 return rc;
375 }
376
377 /*
378 * Read the LPAR name from the Device Tree.
379 *
380 * The value read in the DT is not updated if the end-user is touching the LPAR
381 * name on the hypervisor side.
382 */
read_dt_lpar_name(struct seq_file * m)383 static int read_dt_lpar_name(struct seq_file *m)
384 {
385 const char *name;
386
387 if (of_property_read_string(of_root, "ibm,partition-name", &name))
388 return -ENOENT;
389
390 seq_printf(m, "partition_name=%s\n", name);
391 return 0;
392 }
393
read_lpar_name(struct seq_file * m)394 static void read_lpar_name(struct seq_file *m)
395 {
396 if (read_rtas_lpar_name(m) && read_dt_lpar_name(m))
397 pr_err_once("Error can't get the LPAR name");
398 }
399
400 #define SPLPAR_CHARACTERISTICS_TOKEN 20
401 #define SPLPAR_MAXLENGTH 1026*(sizeof(char))
402
403 /*
404 * parse_system_parameter_string()
405 * Retrieve the potential_processors, max_entitled_capacity and friends
406 * through the get-system-parameter rtas call. Replace keyword strings as
407 * necessary.
408 */
parse_system_parameter_string(struct seq_file * m)409 static void parse_system_parameter_string(struct seq_file *m)
410 {
411 int call_status;
412
413 unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
414 if (!local_buffer) {
415 printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
416 __FILE__, __func__, __LINE__);
417 return;
418 }
419
420 spin_lock(&rtas_data_buf_lock);
421 memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
422 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
423 NULL,
424 SPLPAR_CHARACTERISTICS_TOKEN,
425 __pa(rtas_data_buf),
426 RTAS_DATA_BUF_SIZE);
427 memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
428 local_buffer[SPLPAR_MAXLENGTH - 1] = '\0';
429 spin_unlock(&rtas_data_buf_lock);
430
431 if (call_status != 0) {
432 printk(KERN_INFO
433 "%s %s Error calling get-system-parameter (0x%x)\n",
434 __FILE__, __func__, call_status);
435 } else {
436 int splpar_strlen;
437 int idx, w_idx;
438 char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
439 if (!workbuffer) {
440 printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
441 __FILE__, __func__, __LINE__);
442 kfree(local_buffer);
443 return;
444 }
445 #ifdef LPARCFG_DEBUG
446 printk(KERN_INFO "success calling get-system-parameter\n");
447 #endif
448 splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
449 local_buffer += 2; /* step over strlen value */
450
451 w_idx = 0;
452 idx = 0;
453 while ((*local_buffer) && (idx < splpar_strlen)) {
454 workbuffer[w_idx++] = local_buffer[idx++];
455 if ((local_buffer[idx] == ',')
456 || (local_buffer[idx] == '\0')) {
457 workbuffer[w_idx] = '\0';
458 if (w_idx) {
459 /* avoid the empty string */
460 seq_printf(m, "%s\n", workbuffer);
461 }
462 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
463 idx++; /* skip the comma */
464 w_idx = 0;
465 } else if (local_buffer[idx] == '=') {
466 /* code here to replace workbuffer contents
467 with different keyword strings */
468 if (0 == strcmp(workbuffer, "MaxEntCap")) {
469 strcpy(workbuffer,
470 "partition_max_entitled_capacity");
471 w_idx = strlen(workbuffer);
472 }
473 if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
474 strcpy(workbuffer,
475 "system_potential_processors");
476 w_idx = strlen(workbuffer);
477 }
478 }
479 }
480 kfree(workbuffer);
481 local_buffer -= 2; /* back up over strlen value */
482 }
483 kfree(local_buffer);
484 }
485
486 /* Return the number of processors in the system.
487 * This function reads through the device tree and counts
488 * the virtual processors, this does not include threads.
489 */
lparcfg_count_active_processors(void)490 static int lparcfg_count_active_processors(void)
491 {
492 struct device_node *cpus_dn;
493 int count = 0;
494
495 for_each_node_by_type(cpus_dn, "cpu") {
496 #ifdef LPARCFG_DEBUG
497 printk(KERN_ERR "cpus_dn %p\n", cpus_dn);
498 #endif
499 count++;
500 }
501 return count;
502 }
503
pseries_cmo_data(struct seq_file * m)504 static void pseries_cmo_data(struct seq_file *m)
505 {
506 int cpu;
507 unsigned long cmo_faults = 0;
508 unsigned long cmo_fault_time = 0;
509
510 seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO));
511
512 if (!firmware_has_feature(FW_FEATURE_CMO))
513 return;
514
515 for_each_possible_cpu(cpu) {
516 cmo_faults += be64_to_cpu(lppaca_of(cpu).cmo_faults);
517 cmo_fault_time += be64_to_cpu(lppaca_of(cpu).cmo_fault_time);
518 }
519
520 seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
521 seq_printf(m, "cmo_fault_time_usec=%lu\n",
522 cmo_fault_time / tb_ticks_per_usec);
523 seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp());
524 seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp());
525 seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size());
526 }
527
splpar_dispatch_data(struct seq_file * m)528 static void splpar_dispatch_data(struct seq_file *m)
529 {
530 int cpu;
531 unsigned long dispatches = 0;
532 unsigned long dispatch_dispersions = 0;
533
534 for_each_possible_cpu(cpu) {
535 dispatches += be32_to_cpu(lppaca_of(cpu).yield_count);
536 dispatch_dispersions +=
537 be32_to_cpu(lppaca_of(cpu).dispersion_count);
538 }
539
540 seq_printf(m, "dispatches=%lu\n", dispatches);
541 seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions);
542 }
543
parse_em_data(struct seq_file * m)544 static void parse_em_data(struct seq_file *m)
545 {
546 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
547
548 if (firmware_has_feature(FW_FEATURE_LPAR) &&
549 plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS)
550 seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]);
551 }
552
maxmem_data(struct seq_file * m)553 static void maxmem_data(struct seq_file *m)
554 {
555 unsigned long maxmem = 0;
556
557 maxmem += (unsigned long)drmem_info->n_lmbs * drmem_info->lmb_size;
558 maxmem += hugetlb_total_pages() * PAGE_SIZE;
559
560 seq_printf(m, "MaxMem=%lu\n", maxmem);
561 }
562
pseries_lparcfg_data(struct seq_file * m,void * v)563 static int pseries_lparcfg_data(struct seq_file *m, void *v)
564 {
565 int partition_potential_processors;
566 int partition_active_processors;
567 struct device_node *rtas_node;
568 const __be32 *lrdrp = NULL;
569
570 rtas_node = of_find_node_by_path("/rtas");
571 if (rtas_node)
572 lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
573
574 if (lrdrp == NULL) {
575 partition_potential_processors = vdso_data->processorCount;
576 } else {
577 partition_potential_processors = be32_to_cpup(lrdrp + 4);
578 }
579 of_node_put(rtas_node);
580
581 partition_active_processors = lparcfg_count_active_processors();
582
583 if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
584 /* this call handles the ibm,get-system-parameter contents */
585 read_lpar_name(m);
586 parse_system_parameter_string(m);
587 parse_ppp_data(m);
588 parse_mpp_data(m);
589 parse_mpp_x_data(m);
590 pseries_cmo_data(m);
591 splpar_dispatch_data(m);
592
593 seq_printf(m, "purr=%ld\n", get_purr());
594 seq_printf(m, "tbr=%ld\n", mftb());
595 } else { /* non SPLPAR case */
596
597 seq_printf(m, "system_active_processors=%d\n",
598 partition_potential_processors);
599
600 seq_printf(m, "system_potential_processors=%d\n",
601 partition_potential_processors);
602
603 seq_printf(m, "partition_max_entitled_capacity=%d\n",
604 partition_potential_processors * 100);
605
606 seq_printf(m, "partition_entitled_capacity=%d\n",
607 partition_active_processors * 100);
608 }
609
610 show_gpci_data(m);
611
612 seq_printf(m, "partition_active_processors=%d\n",
613 partition_active_processors);
614
615 seq_printf(m, "partition_potential_processors=%d\n",
616 partition_potential_processors);
617
618 seq_printf(m, "shared_processor_mode=%d\n",
619 lppaca_shared_proc(get_lppaca()));
620
621 #ifdef CONFIG_PPC_64S_HASH_MMU
622 if (!radix_enabled())
623 seq_printf(m, "slb_size=%d\n", mmu_slb_size);
624 #endif
625 parse_em_data(m);
626 maxmem_data(m);
627
628 seq_printf(m, "security_flavor=%u\n", pseries_security_flavor);
629
630 return 0;
631 }
632
update_ppp(u64 * entitlement,u8 * weight)633 static ssize_t update_ppp(u64 *entitlement, u8 *weight)
634 {
635 struct hvcall_ppp_data ppp_data;
636 u8 new_weight;
637 u64 new_entitled;
638 ssize_t retval;
639
640 /* Get our current parameters */
641 retval = h_get_ppp(&ppp_data);
642 if (retval)
643 return retval;
644
645 if (entitlement) {
646 new_weight = ppp_data.weight;
647 new_entitled = *entitlement;
648 } else if (weight) {
649 new_weight = *weight;
650 new_entitled = ppp_data.entitlement;
651 } else
652 return -EINVAL;
653
654 pr_debug("%s: current_entitled = %llu, current_weight = %u\n",
655 __func__, ppp_data.entitlement, ppp_data.weight);
656
657 pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
658 __func__, new_entitled, new_weight);
659
660 retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight);
661 return retval;
662 }
663
664 /**
665 * update_mpp
666 *
667 * Update the memory entitlement and weight for the partition. Caller must
668 * specify either a new entitlement or weight, not both, to be updated
669 * since the h_set_mpp call takes both entitlement and weight as parameters.
670 */
update_mpp(u64 * entitlement,u8 * weight)671 static ssize_t update_mpp(u64 *entitlement, u8 *weight)
672 {
673 struct hvcall_mpp_data mpp_data;
674 u64 new_entitled;
675 u8 new_weight;
676 ssize_t rc;
677
678 if (entitlement) {
679 /* Check with vio to ensure the new memory entitlement
680 * can be handled.
681 */
682 rc = vio_cmo_entitlement_update(*entitlement);
683 if (rc)
684 return rc;
685 }
686
687 rc = h_get_mpp(&mpp_data);
688 if (rc)
689 return rc;
690
691 if (entitlement) {
692 new_weight = mpp_data.mem_weight;
693 new_entitled = *entitlement;
694 } else if (weight) {
695 new_weight = *weight;
696 new_entitled = mpp_data.entitled_mem;
697 } else
698 return -EINVAL;
699
700 pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
701 __func__, mpp_data.entitled_mem, mpp_data.mem_weight);
702
703 pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
704 __func__, new_entitled, new_weight);
705
706 rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight);
707 return rc;
708 }
709
710 /*
711 * Interface for changing system parameters (variable capacity weight
712 * and entitled capacity). Format of input is "param_name=value";
713 * anything after value is ignored. Valid parameters at this time are
714 * "partition_entitled_capacity" and "capacity_weight". We use
715 * H_SET_PPP to alter parameters.
716 *
717 * This function should be invoked only on systems with
718 * FW_FEATURE_SPLPAR.
719 */
lparcfg_write(struct file * file,const char __user * buf,size_t count,loff_t * off)720 static ssize_t lparcfg_write(struct file *file, const char __user * buf,
721 size_t count, loff_t * off)
722 {
723 char kbuf[64];
724 char *tmp;
725 u64 new_entitled, *new_entitled_ptr = &new_entitled;
726 u8 new_weight, *new_weight_ptr = &new_weight;
727 ssize_t retval;
728
729 if (!firmware_has_feature(FW_FEATURE_SPLPAR))
730 return -EINVAL;
731
732 if (count > sizeof(kbuf))
733 return -EINVAL;
734
735 if (copy_from_user(kbuf, buf, count))
736 return -EFAULT;
737
738 kbuf[count - 1] = '\0';
739 tmp = strchr(kbuf, '=');
740 if (!tmp)
741 return -EINVAL;
742
743 *tmp++ = '\0';
744
745 if (!strcmp(kbuf, "partition_entitled_capacity")) {
746 char *endp;
747 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
748 if (endp == tmp)
749 return -EINVAL;
750
751 retval = update_ppp(new_entitled_ptr, NULL);
752
753 if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
754 /*
755 * The hypervisor assigns VAS resources based
756 * on entitled capacity for shared mode.
757 * Reconfig VAS windows based on DLPAR CPU events.
758 */
759 if (pseries_vas_dlpar_cpu() != 0)
760 retval = H_HARDWARE;
761 }
762 } else if (!strcmp(kbuf, "capacity_weight")) {
763 char *endp;
764 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
765 if (endp == tmp)
766 return -EINVAL;
767
768 retval = update_ppp(NULL, new_weight_ptr);
769 } else if (!strcmp(kbuf, "entitled_memory")) {
770 char *endp;
771 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
772 if (endp == tmp)
773 return -EINVAL;
774
775 retval = update_mpp(new_entitled_ptr, NULL);
776 } else if (!strcmp(kbuf, "entitled_memory_weight")) {
777 char *endp;
778 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
779 if (endp == tmp)
780 return -EINVAL;
781
782 retval = update_mpp(NULL, new_weight_ptr);
783 } else
784 return -EINVAL;
785
786 if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
787 retval = count;
788 } else if (retval == H_BUSY) {
789 retval = -EBUSY;
790 } else if (retval == H_HARDWARE) {
791 retval = -EIO;
792 } else if (retval == H_PARAMETER) {
793 retval = -EINVAL;
794 }
795
796 return retval;
797 }
798
lparcfg_data(struct seq_file * m,void * v)799 static int lparcfg_data(struct seq_file *m, void *v)
800 {
801 struct device_node *rootdn;
802 const char *model = "";
803 const char *system_id = "";
804 const char *tmp;
805 const __be32 *lp_index_ptr;
806 unsigned int lp_index = 0;
807
808 seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS);
809
810 rootdn = of_find_node_by_path("/");
811 if (rootdn) {
812 tmp = of_get_property(rootdn, "model", NULL);
813 if (tmp)
814 model = tmp;
815 tmp = of_get_property(rootdn, "system-id", NULL);
816 if (tmp)
817 system_id = tmp;
818 lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
819 NULL);
820 if (lp_index_ptr)
821 lp_index = be32_to_cpup(lp_index_ptr);
822 of_node_put(rootdn);
823 }
824 seq_printf(m, "serial_number=%s\n", system_id);
825 seq_printf(m, "system_type=%s\n", model);
826 seq_printf(m, "partition_id=%d\n", (int)lp_index);
827
828 return pseries_lparcfg_data(m, v);
829 }
830
lparcfg_open(struct inode * inode,struct file * file)831 static int lparcfg_open(struct inode *inode, struct file *file)
832 {
833 return single_open(file, lparcfg_data, NULL);
834 }
835
836 static const struct proc_ops lparcfg_proc_ops = {
837 .proc_read = seq_read,
838 .proc_write = lparcfg_write,
839 .proc_open = lparcfg_open,
840 .proc_release = single_release,
841 .proc_lseek = seq_lseek,
842 };
843
lparcfg_init(void)844 static int __init lparcfg_init(void)
845 {
846 umode_t mode = 0444;
847
848 /* Allow writing if we have FW_FEATURE_SPLPAR */
849 if (firmware_has_feature(FW_FEATURE_SPLPAR))
850 mode |= 0200;
851
852 if (!proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_proc_ops)) {
853 printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
854 return -EIO;
855 }
856 return 0;
857 }
858 machine_device_initcall(pseries, lparcfg_init);
859
