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14a43e69 BH |
1 | /* |
2 | * PowerNV OPAL high level interfaces | |
3 | * | |
4 | * Copyright 2011 IBM Corp. | |
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 | ||
c8742f85 | 12 | #define pr_fmt(fmt) "opal: " fmt |
14a43e69 | 13 | |
c8742f85 | 14 | #include <linux/printk.h> |
14a43e69 BH |
15 | #include <linux/types.h> |
16 | #include <linux/of.h> | |
26a2056e | 17 | #include <linux/of_fdt.h> |
14a43e69 | 18 | #include <linux/of_platform.h> |
8f95faaa | 19 | #include <linux/of_address.h> |
a125e092 | 20 | #include <linux/interrupt.h> |
1bc98de2 | 21 | #include <linux/notifier.h> |
73ed148a | 22 | #include <linux/slab.h> |
b63a0ffe | 23 | #include <linux/sched.h> |
6f68b5e2 | 24 | #include <linux/kobject.h> |
f7d98d18 | 25 | #include <linux/delay.h> |
55672ecf | 26 | #include <linux/memblock.h> |
3bf57561 BH |
27 | #include <linux/kthread.h> |
28 | #include <linux/freezer.h> | |
b746e3e0 NP |
29 | #include <linux/printk.h> |
30 | #include <linux/kmsg_dump.h> | |
31 | #include <linux/console.h> | |
32 | #include <linux/sched/debug.h> | |
b14726c5 ME |
33 | |
34 | #include <asm/machdep.h> | |
14a43e69 BH |
35 | #include <asm/opal.h> |
36 | #include <asm/firmware.h> | |
36df96f8 | 37 | #include <asm/mce.h> |
8f95faaa | 38 | #include <asm/imc-pmu.h> |
6fcd6baa | 39 | #include <asm/bug.h> |
14a43e69 BH |
40 | |
41 | #include "powernv.h" | |
42 | ||
6f68b5e2 VH |
43 | /* /sys/firmware/opal */ |
44 | struct kobject *opal_kobj; | |
45 | ||
14a43e69 BH |
46 | struct opal { |
47 | u64 base; | |
48 | u64 entry; | |
55672ecf | 49 | u64 size; |
14a43e69 BH |
50 | } opal; |
51 | ||
55672ecf MS |
52 | struct mcheck_recoverable_range { |
53 | u64 start_addr; | |
54 | u64 end_addr; | |
55 | u64 recover_addr; | |
56 | }; | |
57 | ||
58 | static struct mcheck_recoverable_range *mc_recoverable_range; | |
59 | static int mc_recoverable_range_len; | |
60 | ||
bfc36894 | 61 | struct device_node *opal_node; |
14a43e69 | 62 | static DEFINE_SPINLOCK(opal_write_lock); |
24366360 | 63 | static struct atomic_notifier_head opal_msg_notifier_head[OPAL_MSG_TYPE_MAX]; |
3bf57561 | 64 | static uint32_t opal_heartbeat; |
a203658b | 65 | static struct task_struct *kopald_tsk; |
14a43e69 | 66 | |
d3cbff1b | 67 | void opal_configure_cores(void) |
4926616c | 68 | { |
1c0eaf0f BH |
69 | u64 reinit_flags = 0; |
70 | ||
4926616c BH |
71 | /* Do the actual re-init, This will clobber all FPRs, VRs, etc... |
72 | * | |
73 | * It will preserve non volatile GPRs and HSPRG0/1. It will | |
74 | * also restore HIDs and other SPRs to their original value | |
75 | * but it might clobber a bunch. | |
76 | */ | |
77 | #ifdef __BIG_ENDIAN__ | |
1c0eaf0f | 78 | reinit_flags |= OPAL_REINIT_CPUS_HILE_BE; |
4926616c | 79 | #else |
1c0eaf0f | 80 | reinit_flags |= OPAL_REINIT_CPUS_HILE_LE; |
4926616c | 81 | #endif |
d3cbff1b | 82 | |
1c0eaf0f BH |
83 | /* |
84 | * POWER9 always support running hash: | |
85 | * ie. Host hash supports hash guests | |
86 | * Host radix supports hash/radix guests | |
87 | */ | |
a70b487b | 88 | if (early_cpu_has_feature(CPU_FTR_ARCH_300)) { |
1c0eaf0f BH |
89 | reinit_flags |= OPAL_REINIT_CPUS_MMU_HASH; |
90 | if (early_radix_enabled()) | |
91 | reinit_flags |= OPAL_REINIT_CPUS_MMU_RADIX; | |
92 | } | |
93 | ||
94 | opal_reinit_cpus(reinit_flags); | |
95 | ||
d3cbff1b BH |
96 | /* Restore some bits */ |
97 | if (cur_cpu_spec->cpu_restore) | |
98 | cur_cpu_spec->cpu_restore(); | |
4926616c BH |
99 | } |
100 | ||
14a43e69 BH |
101 | int __init early_init_dt_scan_opal(unsigned long node, |
102 | const char *uname, int depth, void *data) | |
103 | { | |
55672ecf | 104 | const void *basep, *entryp, *sizep; |
9d0c4dfe | 105 | int basesz, entrysz, runtimesz; |
14a43e69 BH |
106 | |
107 | if (depth != 1 || strcmp(uname, "ibm,opal") != 0) | |
108 | return 0; | |
109 | ||
110 | basep = of_get_flat_dt_prop(node, "opal-base-address", &basesz); | |
111 | entryp = of_get_flat_dt_prop(node, "opal-entry-address", &entrysz); | |
55672ecf | 112 | sizep = of_get_flat_dt_prop(node, "opal-runtime-size", &runtimesz); |
14a43e69 | 113 | |
55672ecf | 114 | if (!basep || !entryp || !sizep) |
14a43e69 BH |
115 | return 1; |
116 | ||
117 | opal.base = of_read_number(basep, basesz/4); | |
118 | opal.entry = of_read_number(entryp, entrysz/4); | |
55672ecf | 119 | opal.size = of_read_number(sizep, runtimesz/4); |
14a43e69 | 120 | |
9d0c4dfe | 121 | pr_debug("OPAL Base = 0x%llx (basep=%p basesz=%d)\n", |
14a43e69 | 122 | opal.base, basep, basesz); |
9d0c4dfe | 123 | pr_debug("OPAL Entry = 0x%llx (entryp=%p basesz=%d)\n", |
14a43e69 | 124 | opal.entry, entryp, entrysz); |
9d0c4dfe | 125 | pr_debug("OPAL Entry = 0x%llx (sizep=%p runtimesz=%d)\n", |
55672ecf | 126 | opal.size, sizep, runtimesz); |
14a43e69 | 127 | |
75b93da4 | 128 | if (of_flat_dt_is_compatible(node, "ibm,opal-v3")) { |
e4d54f71 | 129 | powerpc_firmware_features |= FW_FEATURE_OPAL; |
5138b314 | 130 | pr_debug("OPAL detected !\n"); |
14a43e69 | 131 | } else { |
786842b6 | 132 | panic("OPAL != V3 detected, no longer supported.\n"); |
14a43e69 BH |
133 | } |
134 | ||
c4463b37 JK |
135 | return 1; |
136 | } | |
137 | ||
55672ecf MS |
138 | int __init early_init_dt_scan_recoverable_ranges(unsigned long node, |
139 | const char *uname, int depth, void *data) | |
140 | { | |
9d0c4dfe | 141 | int i, psize, size; |
55672ecf MS |
142 | const __be32 *prop; |
143 | ||
144 | if (depth != 1 || strcmp(uname, "ibm,opal") != 0) | |
145 | return 0; | |
146 | ||
6e556b47 | 147 | prop = of_get_flat_dt_prop(node, "mcheck-recoverable-ranges", &psize); |
55672ecf MS |
148 | |
149 | if (!prop) | |
150 | return 1; | |
151 | ||
152 | pr_debug("Found machine check recoverable ranges.\n"); | |
153 | ||
6e556b47 MS |
154 | /* |
155 | * Calculate number of available entries. | |
156 | * | |
157 | * Each recoverable address range entry is (start address, len, | |
158 | * recovery address), 2 cells each for start and recovery address, | |
159 | * 1 cell for len, totalling 5 cells per entry. | |
160 | */ | |
161 | mc_recoverable_range_len = psize / (sizeof(*prop) * 5); | |
162 | ||
163 | /* Sanity check */ | |
164 | if (!mc_recoverable_range_len) | |
165 | return 1; | |
166 | ||
167 | /* Size required to hold all the entries. */ | |
168 | size = mc_recoverable_range_len * | |
169 | sizeof(struct mcheck_recoverable_range); | |
170 | ||
55672ecf | 171 | /* |
76b42e28 | 172 | * Allocate a buffer to hold the MC recoverable ranges. |
55672ecf | 173 | */ |
76b42e28 | 174 | mc_recoverable_range =__va(memblock_alloc(size, __alignof__(u64))); |
55672ecf MS |
175 | memset(mc_recoverable_range, 0, size); |
176 | ||
6e556b47 | 177 | for (i = 0; i < mc_recoverable_range_len; i++) { |
55672ecf MS |
178 | mc_recoverable_range[i].start_addr = |
179 | of_read_number(prop + (i * 5) + 0, 2); | |
180 | mc_recoverable_range[i].end_addr = | |
181 | mc_recoverable_range[i].start_addr + | |
182 | of_read_number(prop + (i * 5) + 2, 1); | |
183 | mc_recoverable_range[i].recover_addr = | |
184 | of_read_number(prop + (i * 5) + 3, 2); | |
185 | ||
186 | pr_debug("Machine check recoverable range: %llx..%llx: %llx\n", | |
187 | mc_recoverable_range[i].start_addr, | |
188 | mc_recoverable_range[i].end_addr, | |
189 | mc_recoverable_range[i].recover_addr); | |
190 | } | |
55672ecf MS |
191 | return 1; |
192 | } | |
193 | ||
c4463b37 JK |
194 | static int __init opal_register_exception_handlers(void) |
195 | { | |
29186097 | 196 | #ifdef __BIG_ENDIAN__ |
c4463b37 JK |
197 | u64 glue; |
198 | ||
199 | if (!(powerpc_firmware_features & FW_FEATURE_OPAL)) | |
200 | return -ENODEV; | |
201 | ||
28446de2 MS |
202 | /* Hookup some exception handlers except machine check. We use the |
203 | * fwnmi area at 0x7000 to provide the glue space to OPAL | |
ed79ba9e BH |
204 | */ |
205 | glue = 0x7000; | |
6507955c MS |
206 | |
207 | /* | |
208 | * Check if we are running on newer firmware that exports | |
209 | * OPAL_HANDLE_HMI token. If yes, then don't ask OPAL to patch | |
210 | * the HMI interrupt and we catch it directly in Linux. | |
211 | * | |
212 | * For older firmware (i.e currently released POWER8 System Firmware | |
213 | * as of today <= SV810_087), we fallback to old behavior and let OPAL | |
214 | * patch the HMI vector and handle it inside OPAL firmware. | |
215 | * | |
216 | * For newer firmware (in development/yet to be released) we will | |
217 | * start catching/handling HMI directly in Linux. | |
218 | */ | |
219 | if (!opal_check_token(OPAL_HANDLE_HMI)) { | |
08135139 | 220 | pr_info("Old firmware detected, OPAL handles HMIs.\n"); |
6507955c MS |
221 | opal_register_exception_handler( |
222 | OPAL_HYPERVISOR_MAINTENANCE_HANDLER, | |
223 | 0, glue); | |
224 | glue += 128; | |
225 | } | |
226 | ||
ed79ba9e | 227 | opal_register_exception_handler(OPAL_SOFTPATCH_HANDLER, 0, glue); |
29186097 | 228 | #endif |
ed79ba9e | 229 | |
c4463b37 | 230 | return 0; |
14a43e69 | 231 | } |
b14726c5 | 232 | machine_early_initcall(powernv, opal_register_exception_handlers); |
c4463b37 | 233 | |
24366360 MS |
234 | /* |
235 | * Opal message notifier based on message type. Allow subscribers to get | |
236 | * notified for specific messgae type. | |
237 | */ | |
d7cf83fc | 238 | int opal_message_notifier_register(enum opal_msg_type msg_type, |
24366360 MS |
239 | struct notifier_block *nb) |
240 | { | |
792f96e9 | 241 | if (!nb || msg_type >= OPAL_MSG_TYPE_MAX) { |
f2c2cbcc JP |
242 | pr_warn("%s: Invalid arguments, msg_type:%d\n", |
243 | __func__, msg_type); | |
24366360 MS |
244 | return -EINVAL; |
245 | } | |
792f96e9 | 246 | |
24366360 MS |
247 | return atomic_notifier_chain_register( |
248 | &opal_msg_notifier_head[msg_type], nb); | |
249 | } | |
594fcb9e | 250 | EXPORT_SYMBOL_GPL(opal_message_notifier_register); |
24366360 | 251 | |
df60f576 | 252 | int opal_message_notifier_unregister(enum opal_msg_type msg_type, |
b921e902 NG |
253 | struct notifier_block *nb) |
254 | { | |
255 | return atomic_notifier_chain_unregister( | |
256 | &opal_msg_notifier_head[msg_type], nb); | |
257 | } | |
594fcb9e | 258 | EXPORT_SYMBOL_GPL(opal_message_notifier_unregister); |
b921e902 | 259 | |
24366360 MS |
260 | static void opal_message_do_notify(uint32_t msg_type, void *msg) |
261 | { | |
262 | /* notify subscribers */ | |
263 | atomic_notifier_call_chain(&opal_msg_notifier_head[msg_type], | |
264 | msg_type, msg); | |
265 | } | |
266 | ||
267 | static void opal_handle_message(void) | |
268 | { | |
269 | s64 ret; | |
270 | /* | |
271 | * TODO: pre-allocate a message buffer depending on opal-msg-size | |
272 | * value in /proc/device-tree. | |
273 | */ | |
274 | static struct opal_msg msg; | |
bb4398e1 | 275 | u32 type; |
24366360 MS |
276 | |
277 | ret = opal_get_msg(__pa(&msg), sizeof(msg)); | |
278 | /* No opal message pending. */ | |
279 | if (ret == OPAL_RESOURCE) | |
280 | return; | |
281 | ||
282 | /* check for errors. */ | |
283 | if (ret) { | |
f2c2cbcc JP |
284 | pr_warn("%s: Failed to retrieve opal message, err=%lld\n", |
285 | __func__, ret); | |
24366360 MS |
286 | return; |
287 | } | |
288 | ||
bb4398e1 AB |
289 | type = be32_to_cpu(msg.msg_type); |
290 | ||
24366360 | 291 | /* Sanity check */ |
792f96e9 | 292 | if (type >= OPAL_MSG_TYPE_MAX) { |
98da62b7 | 293 | pr_warn_once("%s: Unknown message type: %u\n", __func__, type); |
24366360 MS |
294 | return; |
295 | } | |
bb4398e1 | 296 | opal_message_do_notify(type, (void *)&msg); |
24366360 MS |
297 | } |
298 | ||
a295af24 | 299 | static irqreturn_t opal_message_notify(int irq, void *data) |
24366360 | 300 | { |
a295af24 AP |
301 | opal_handle_message(); |
302 | return IRQ_HANDLED; | |
24366360 MS |
303 | } |
304 | ||
24366360 MS |
305 | static int __init opal_message_init(void) |
306 | { | |
a295af24 | 307 | int ret, i, irq; |
24366360 MS |
308 | |
309 | for (i = 0; i < OPAL_MSG_TYPE_MAX; i++) | |
310 | ATOMIC_INIT_NOTIFIER_HEAD(&opal_msg_notifier_head[i]); | |
311 | ||
a295af24 AP |
312 | irq = opal_event_request(ilog2(OPAL_EVENT_MSG_PENDING)); |
313 | if (!irq) { | |
314 | pr_err("%s: Can't register OPAL event irq (%d)\n", | |
315 | __func__, irq); | |
316 | return irq; | |
317 | } | |
318 | ||
319 | ret = request_irq(irq, opal_message_notify, | |
320 | IRQ_TYPE_LEVEL_HIGH, "opal-msg", NULL); | |
24366360 | 321 | if (ret) { |
a295af24 | 322 | pr_err("%s: Can't request OPAL event irq (%d)\n", |
24366360 MS |
323 | __func__, ret); |
324 | return ret; | |
325 | } | |
a295af24 | 326 | |
24366360 MS |
327 | return 0; |
328 | } | |
24366360 | 329 | |
14a43e69 BH |
330 | int opal_get_chars(uint32_t vtermno, char *buf, int count) |
331 | { | |
4f89363b BH |
332 | s64 rc; |
333 | __be64 evt, len; | |
14a43e69 BH |
334 | |
335 | if (!opal.entry) | |
daea1175 | 336 | return -ENODEV; |
14a43e69 | 337 | opal_poll_events(&evt); |
4f89363b | 338 | if ((be64_to_cpu(evt) & OPAL_EVENT_CONSOLE_INPUT) == 0) |
14a43e69 | 339 | return 0; |
4f89363b | 340 | len = cpu_to_be64(count); |
9d0c4dfe | 341 | rc = opal_console_read(vtermno, &len, buf); |
14a43e69 | 342 | if (rc == OPAL_SUCCESS) |
4f89363b | 343 | return be64_to_cpu(len); |
14a43e69 BH |
344 | return 0; |
345 | } | |
346 | ||
347 | int opal_put_chars(uint32_t vtermno, const char *data, int total_len) | |
348 | { | |
349 | int written = 0; | |
4f89363b | 350 | __be64 olen; |
daea1175 | 351 | s64 len, rc; |
14a43e69 | 352 | unsigned long flags; |
14a43e69 BH |
353 | |
354 | if (!opal.entry) | |
daea1175 | 355 | return -ENODEV; |
14a43e69 BH |
356 | |
357 | /* We want put_chars to be atomic to avoid mangling of hvsi | |
358 | * packets. To do that, we first test for room and return | |
daea1175 BH |
359 | * -EAGAIN if there isn't enough. |
360 | * | |
361 | * Unfortunately, opal_console_write_buffer_space() doesn't | |
362 | * appear to work on opal v1, so we just assume there is | |
363 | * enough room and be done with it | |
14a43e69 BH |
364 | */ |
365 | spin_lock_irqsave(&opal_write_lock, flags); | |
e4d54f71 SS |
366 | rc = opal_console_write_buffer_space(vtermno, &olen); |
367 | len = be64_to_cpu(olen); | |
368 | if (rc || len < total_len) { | |
369 | spin_unlock_irqrestore(&opal_write_lock, flags); | |
370 | /* Closed -> drop characters */ | |
371 | if (rc) | |
372 | return total_len; | |
d2a2262e | 373 | opal_flush_console(vtermno); |
e4d54f71 | 374 | return -EAGAIN; |
14a43e69 BH |
375 | } |
376 | ||
377 | /* We still try to handle partial completions, though they | |
378 | * should no longer happen. | |
379 | */ | |
36d2dabc NP |
380 | |
381 | while (total_len > 0) { | |
4f89363b | 382 | olen = cpu_to_be64(total_len); |
36d2dabc NP |
383 | |
384 | rc = OPAL_BUSY; | |
385 | while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { | |
386 | rc = opal_console_write(vtermno, &olen, data); | |
387 | if (rc == OPAL_BUSY_EVENT) { | |
388 | mdelay(OPAL_BUSY_DELAY_MS); | |
389 | opal_poll_events(NULL); | |
390 | } else if (rc == OPAL_BUSY) { | |
391 | mdelay(OPAL_BUSY_DELAY_MS); | |
392 | } | |
393 | } | |
394 | ||
4f89363b | 395 | len = be64_to_cpu(olen); |
1de1455f BH |
396 | |
397 | /* Closed or other error drop */ | |
36d2dabc NP |
398 | if (rc != OPAL_SUCCESS) { |
399 | written += total_len; /* drop remaining chars */ | |
1de1455f BH |
400 | break; |
401 | } | |
36d2dabc NP |
402 | |
403 | total_len -= len; | |
404 | data += len; | |
405 | written += len; | |
406 | ||
14a43e69 BH |
407 | /* This is a bit nasty but we need that for the console to |
408 | * flush when there aren't any interrupts. We will clean | |
409 | * things a bit later to limit that to synchronous path | |
410 | * such as the kernel console and xmon/udbg | |
411 | */ | |
d2a2262e NP |
412 | opal_flush_console(vtermno); |
413 | } | |
414 | spin_unlock_irqrestore(&opal_write_lock, flags); | |
415 | ||
416 | return written; | |
417 | } | |
418 | ||
419 | int opal_flush_console(uint32_t vtermno) | |
420 | { | |
421 | s64 rc; | |
422 | ||
423 | if (!opal_check_token(OPAL_CONSOLE_FLUSH)) { | |
424 | __be64 evt; | |
425 | ||
426 | WARN_ONCE(1, "opal: OPAL_CONSOLE_FLUSH missing.\n"); | |
427 | /* | |
428 | * If OPAL_CONSOLE_FLUSH is not implemented in the firmware, | |
429 | * the console can still be flushed by calling the polling | |
430 | * function while it has OPAL_EVENT_CONSOLE_OUTPUT events. | |
431 | */ | |
36d2dabc | 432 | do { |
14a43e69 | 433 | opal_poll_events(&evt); |
36d2dabc | 434 | } while (be64_to_cpu(evt) & OPAL_EVENT_CONSOLE_OUTPUT); |
d2a2262e NP |
435 | |
436 | return OPAL_SUCCESS; | |
14a43e69 | 437 | } |
d2a2262e NP |
438 | |
439 | do { | |
440 | rc = OPAL_BUSY; | |
441 | while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { | |
442 | rc = opal_console_flush(vtermno); | |
443 | if (rc == OPAL_BUSY_EVENT) { | |
444 | mdelay(OPAL_BUSY_DELAY_MS); | |
445 | opal_poll_events(NULL); | |
446 | } else if (rc == OPAL_BUSY) { | |
447 | mdelay(OPAL_BUSY_DELAY_MS); | |
448 | } | |
449 | } | |
450 | } while (rc == OPAL_PARTIAL); /* More to flush */ | |
451 | ||
452 | return opal_error_code(rc); | |
14a43e69 BH |
453 | } |
454 | ||
b63a0ffe MS |
455 | static int opal_recover_mce(struct pt_regs *regs, |
456 | struct machine_check_event *evt) | |
457 | { | |
458 | int recovered = 0; | |
b63a0ffe MS |
459 | |
460 | if (!(regs->msr & MSR_RI)) { | |
461 | /* If MSR_RI isn't set, we cannot recover */ | |
c74dd88e | 462 | pr_err("Machine check interrupt unrecoverable: MSR(RI=0)\n"); |
b63a0ffe MS |
463 | recovered = 0; |
464 | } else if (evt->disposition == MCE_DISPOSITION_RECOVERED) { | |
465 | /* Platform corrected itself */ | |
466 | recovered = 1; | |
1363875b NP |
467 | } else if (evt->severity == MCE_SEV_FATAL) { |
468 | /* Fatal machine check */ | |
469 | pr_err("Machine check interrupt is fatal\n"); | |
470 | recovered = 0; | |
6fcd6baa NP |
471 | } |
472 | ||
473 | if (!recovered && evt->severity == MCE_SEV_ERROR_SYNC) { | |
b63a0ffe | 474 | /* |
6fcd6baa NP |
475 | * Try to kill processes if we get a synchronous machine check |
476 | * (e.g., one caused by execution of this instruction). This | |
477 | * will devolve into a panic if we try to kill init or are in | |
478 | * an interrupt etc. | |
b63a0ffe MS |
479 | * |
480 | * TODO: Queue up this address for hwpoisioning later. | |
6fcd6baa NP |
481 | * TODO: This is not quite right for d-side machine |
482 | * checks ->nip is not necessarily the important | |
483 | * address. | |
b63a0ffe | 484 | */ |
6fcd6baa NP |
485 | if ((user_mode(regs))) { |
486 | _exception(SIGBUS, regs, BUS_MCEERR_AR, regs->nip); | |
487 | recovered = 1; | |
488 | } else if (die_will_crash()) { | |
489 | /* | |
490 | * die() would kill the kernel, so better to go via | |
491 | * the platform reboot code that will log the | |
492 | * machine check. | |
493 | */ | |
494 | recovered = 0; | |
495 | } else { | |
496 | die("Machine check", regs, SIGBUS); | |
497 | recovered = 1; | |
498 | } | |
b63a0ffe | 499 | } |
6fcd6baa | 500 | |
b63a0ffe MS |
501 | return recovered; |
502 | } | |
503 | ||
b746e3e0 NP |
504 | void pnv_platform_error_reboot(struct pt_regs *regs, const char *msg) |
505 | { | |
35adacd6 NP |
506 | panic_flush_kmsg_start(); |
507 | ||
b746e3e0 NP |
508 | pr_emerg("Hardware platform error: %s\n", msg); |
509 | if (regs) | |
510 | show_regs(regs); | |
511 | smp_send_stop(); | |
35adacd6 NP |
512 | |
513 | panic_flush_kmsg_end(); | |
b746e3e0 NP |
514 | |
515 | /* | |
516 | * Don't bother to shut things down because this will | |
517 | * xstop the system. | |
518 | */ | |
519 | if (opal_cec_reboot2(OPAL_REBOOT_PLATFORM_ERROR, msg) | |
520 | == OPAL_UNSUPPORTED) { | |
521 | pr_emerg("Reboot type %d not supported for %s\n", | |
522 | OPAL_REBOOT_PLATFORM_ERROR, msg); | |
523 | } | |
524 | ||
525 | /* | |
526 | * We reached here. There can be three possibilities: | |
527 | * 1. We are running on a firmware level that do not support | |
528 | * opal_cec_reboot2() | |
529 | * 2. We are running on a firmware level that do not support | |
530 | * OPAL_REBOOT_PLATFORM_ERROR reboot type. | |
531 | * 3. We are running on FSP based system that does not need | |
532 | * opal to trigger checkstop explicitly for error analysis. | |
533 | * The FSP PRD component would have already got notified | |
534 | * about this error through other channels. | |
5ee573e8 BS |
535 | * 4. We are running on a newer skiboot that by default does |
536 | * not cause a checkstop, drops us back to the kernel to | |
537 | * extract context and state at the time of the error. | |
b746e3e0 NP |
538 | */ |
539 | ||
5ee573e8 | 540 | panic(msg); |
b746e3e0 NP |
541 | } |
542 | ||
ed79ba9e BH |
543 | int opal_machine_check(struct pt_regs *regs) |
544 | { | |
36df96f8 | 545 | struct machine_check_event evt; |
ed79ba9e | 546 | |
36df96f8 MS |
547 | if (!get_mce_event(&evt, MCE_EVENT_RELEASE)) |
548 | return 0; | |
ed79ba9e BH |
549 | |
550 | /* Print things out */ | |
36df96f8 | 551 | if (evt.version != MCE_V1) { |
ed79ba9e BH |
552 | pr_err("Machine Check Exception, Unknown event version %d !\n", |
553 | evt.version); | |
554 | return 0; | |
555 | } | |
63f44d65 | 556 | machine_check_print_event_info(&evt, user_mode(regs)); |
ed79ba9e | 557 | |
b63a0ffe MS |
558 | if (opal_recover_mce(regs, &evt)) |
559 | return 1; | |
e784b649 | 560 | |
b746e3e0 | 561 | pnv_platform_error_reboot(regs, "Unrecoverable Machine Check exception"); |
ed79ba9e BH |
562 | } |
563 | ||
0869b6fd MS |
564 | /* Early hmi handler called in real mode. */ |
565 | int opal_hmi_exception_early(struct pt_regs *regs) | |
566 | { | |
0ef95b41 MS |
567 | s64 rc; |
568 | ||
569 | /* | |
570 | * call opal hmi handler. Pass paca address as token. | |
571 | * The return value OPAL_SUCCESS is an indication that there is | |
572 | * an HMI event generated waiting to pull by Linux. | |
573 | */ | |
574 | rc = opal_handle_hmi(); | |
575 | if (rc == OPAL_SUCCESS) { | |
576 | local_paca->hmi_event_available = 1; | |
577 | return 1; | |
578 | } | |
0869b6fd MS |
579 | return 0; |
580 | } | |
581 | ||
582 | /* HMI exception handler called in virtual mode during check_irq_replay. */ | |
583 | int opal_handle_hmi_exception(struct pt_regs *regs) | |
584 | { | |
0ef95b41 MS |
585 | /* |
586 | * Check if HMI event is available. | |
56c0b48b | 587 | * if Yes, then wake kopald to process them. |
0ef95b41 MS |
588 | */ |
589 | if (!local_paca->hmi_event_available) | |
590 | return 0; | |
591 | ||
592 | local_paca->hmi_event_available = 0; | |
56c0b48b | 593 | opal_wake_poller(); |
0ef95b41 MS |
594 | |
595 | return 1; | |
0869b6fd MS |
596 | } |
597 | ||
55672ecf MS |
598 | static uint64_t find_recovery_address(uint64_t nip) |
599 | { | |
600 | int i; | |
601 | ||
602 | for (i = 0; i < mc_recoverable_range_len; i++) | |
603 | if ((nip >= mc_recoverable_range[i].start_addr) && | |
604 | (nip < mc_recoverable_range[i].end_addr)) | |
605 | return mc_recoverable_range[i].recover_addr; | |
606 | return 0; | |
607 | } | |
608 | ||
609 | bool opal_mce_check_early_recovery(struct pt_regs *regs) | |
610 | { | |
611 | uint64_t recover_addr = 0; | |
612 | ||
613 | if (!opal.base || !opal.size) | |
614 | goto out; | |
615 | ||
616 | if ((regs->nip >= opal.base) && | |
dc3799bb | 617 | (regs->nip < (opal.base + opal.size))) |
55672ecf MS |
618 | recover_addr = find_recovery_address(regs->nip); |
619 | ||
620 | /* | |
621 | * Setup regs->nip to rfi into fixup address. | |
622 | */ | |
623 | if (recover_addr) | |
624 | regs->nip = recover_addr; | |
625 | ||
626 | out: | |
627 | return !!recover_addr; | |
628 | } | |
629 | ||
6f68b5e2 VH |
630 | static int opal_sysfs_init(void) |
631 | { | |
632 | opal_kobj = kobject_create_and_add("opal", firmware_kobj); | |
633 | if (!opal_kobj) { | |
634 | pr_warn("kobject_create_and_add opal failed\n"); | |
635 | return -ENOMEM; | |
636 | } | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
c8742f85 BH |
641 | static ssize_t symbol_map_read(struct file *fp, struct kobject *kobj, |
642 | struct bin_attribute *bin_attr, | |
643 | char *buf, loff_t off, size_t count) | |
644 | { | |
645 | return memory_read_from_buffer(buf, count, &off, bin_attr->private, | |
646 | bin_attr->size); | |
647 | } | |
648 | ||
649 | static BIN_ATTR_RO(symbol_map, 0); | |
650 | ||
651 | static void opal_export_symmap(void) | |
652 | { | |
653 | const __be64 *syms; | |
654 | unsigned int size; | |
655 | struct device_node *fw; | |
656 | int rc; | |
657 | ||
658 | fw = of_find_node_by_path("/ibm,opal/firmware"); | |
659 | if (!fw) | |
660 | return; | |
661 | syms = of_get_property(fw, "symbol-map", &size); | |
662 | if (!syms || size != 2 * sizeof(__be64)) | |
663 | return; | |
664 | ||
665 | /* Setup attributes */ | |
666 | bin_attr_symbol_map.private = __va(be64_to_cpu(syms[0])); | |
667 | bin_attr_symbol_map.size = be64_to_cpu(syms[1]); | |
668 | ||
669 | rc = sysfs_create_bin_file(opal_kobj, &bin_attr_symbol_map); | |
670 | if (rc) | |
671 | pr_warn("Error %d creating OPAL symbols file\n", rc); | |
672 | } | |
673 | ||
11fe909d MB |
674 | static ssize_t export_attr_read(struct file *fp, struct kobject *kobj, |
675 | struct bin_attribute *bin_attr, char *buf, | |
676 | loff_t off, size_t count) | |
677 | { | |
678 | return memory_read_from_buffer(buf, count, &off, bin_attr->private, | |
679 | bin_attr->size); | |
680 | } | |
681 | ||
682 | /* | |
683 | * opal_export_attrs: creates a sysfs node for each property listed in | |
684 | * the device-tree under /ibm,opal/firmware/exports/ | |
685 | * All new sysfs nodes are created under /opal/exports/. | |
686 | * This allows for reserved memory regions (e.g. HDAT) to be read. | |
687 | * The new sysfs nodes are only readable by root. | |
688 | */ | |
689 | static void opal_export_attrs(void) | |
690 | { | |
691 | struct bin_attribute *attr; | |
692 | struct device_node *np; | |
693 | struct property *prop; | |
694 | struct kobject *kobj; | |
695 | u64 vals[2]; | |
696 | int rc; | |
697 | ||
698 | np = of_find_node_by_path("/ibm,opal/firmware/exports"); | |
699 | if (!np) | |
700 | return; | |
701 | ||
702 | /* Create new 'exports' directory - /sys/firmware/opal/exports */ | |
703 | kobj = kobject_create_and_add("exports", opal_kobj); | |
704 | if (!kobj) { | |
705 | pr_warn("kobject_create_and_add() of exports failed\n"); | |
706 | return; | |
707 | } | |
708 | ||
709 | for_each_property_of_node(np, prop) { | |
710 | if (!strcmp(prop->name, "name") || !strcmp(prop->name, "phandle")) | |
711 | continue; | |
712 | ||
713 | if (of_property_read_u64_array(np, prop->name, &vals[0], 2)) | |
714 | continue; | |
715 | ||
83c49190 | 716 | attr = kzalloc(sizeof(*attr), GFP_KERNEL); |
11fe909d MB |
717 | |
718 | if (attr == NULL) { | |
719 | pr_warn("Failed kmalloc for bin_attribute!"); | |
720 | continue; | |
721 | } | |
722 | ||
83c49190 | 723 | sysfs_bin_attr_init(attr); |
11fe909d MB |
724 | attr->attr.name = kstrdup(prop->name, GFP_KERNEL); |
725 | attr->attr.mode = 0400; | |
726 | attr->read = export_attr_read; | |
727 | attr->private = __va(vals[0]); | |
728 | attr->size = vals[1]; | |
729 | ||
730 | if (attr->attr.name == NULL) { | |
731 | pr_warn("Failed kstrdup for bin_attribute attr.name"); | |
732 | kfree(attr); | |
733 | continue; | |
734 | } | |
735 | ||
736 | rc = sysfs_create_bin_file(kobj, attr); | |
737 | if (rc) { | |
738 | pr_warn("Error %d creating OPAL sysfs exports/%s file\n", | |
739 | rc, prop->name); | |
740 | kfree(attr->attr.name); | |
741 | kfree(attr); | |
742 | } | |
743 | } | |
744 | ||
745 | of_node_put(np); | |
746 | } | |
747 | ||
b09c2ec4 VH |
748 | static void __init opal_dump_region_init(void) |
749 | { | |
750 | void *addr; | |
751 | uint64_t size; | |
752 | int rc; | |
753 | ||
b962f5a4 SS |
754 | if (!opal_check_token(OPAL_REGISTER_DUMP_REGION)) |
755 | return; | |
756 | ||
b09c2ec4 VH |
757 | /* Register kernel log buffer */ |
758 | addr = log_buf_addr_get(); | |
6501ab5e PK |
759 | if (addr == NULL) |
760 | return; | |
761 | ||
b09c2ec4 | 762 | size = log_buf_len_get(); |
6501ab5e PK |
763 | if (size == 0) |
764 | return; | |
765 | ||
b09c2ec4 VH |
766 | rc = opal_register_dump_region(OPAL_DUMP_REGION_LOG_BUF, |
767 | __pa(addr), size); | |
768 | /* Don't warn if this is just an older OPAL that doesn't | |
769 | * know about that call | |
770 | */ | |
771 | if (rc && rc != OPAL_UNSUPPORTED) | |
772 | pr_warn("DUMP: Failed to register kernel log buffer. " | |
773 | "rc = %d\n", rc); | |
774 | } | |
608b286d | 775 | |
9e4f51bd | 776 | static void opal_pdev_init(const char *compatible) |
ed59190e CB |
777 | { |
778 | struct device_node *np; | |
779 | ||
9e4f51bd | 780 | for_each_compatible_node(np, NULL, compatible) |
47083450 NG |
781 | of_platform_device_create(np, NULL, NULL); |
782 | } | |
783 | ||
8f95faaa MS |
784 | static void __init opal_imc_init_dev(void) |
785 | { | |
786 | struct device_node *np; | |
787 | ||
788 | np = of_find_compatible_node(NULL, NULL, IMC_DTB_COMPAT); | |
789 | if (np) | |
790 | of_platform_device_create(np, NULL, NULL); | |
791 | } | |
792 | ||
3bf57561 BH |
793 | static int kopald(void *unused) |
794 | { | |
a203658b | 795 | unsigned long timeout = msecs_to_jiffies(opal_heartbeat) + 1; |
9f0fd049 | 796 | |
3bf57561 BH |
797 | set_freezable(); |
798 | do { | |
799 | try_to_freeze(); | |
56c0b48b NP |
800 | |
801 | opal_handle_events(); | |
802 | ||
803 | set_current_state(TASK_INTERRUPTIBLE); | |
804 | if (opal_have_pending_events()) | |
805 | __set_current_state(TASK_RUNNING); | |
806 | else | |
807 | schedule_timeout(timeout); | |
808 | ||
3bf57561 BH |
809 | } while (!kthread_should_stop()); |
810 | ||
811 | return 0; | |
812 | } | |
813 | ||
a203658b BH |
814 | void opal_wake_poller(void) |
815 | { | |
816 | if (kopald_tsk) | |
817 | wake_up_process(kopald_tsk); | |
818 | } | |
819 | ||
3bf57561 BH |
820 | static void opal_init_heartbeat(void) |
821 | { | |
822 | /* Old firwmware, we assume the HVC heartbeat is sufficient */ | |
823 | if (of_property_read_u32(opal_node, "ibm,heartbeat-ms", | |
824 | &opal_heartbeat) != 0) | |
825 | opal_heartbeat = 0; | |
826 | ||
827 | if (opal_heartbeat) | |
a203658b | 828 | kopald_tsk = kthread_run(kopald, NULL, "kopald"); |
3bf57561 BH |
829 | } |
830 | ||
14a43e69 BH |
831 | static int __init opal_init(void) |
832 | { | |
c159b596 | 833 | struct device_node *np, *consoles, *leds; |
c1c3a526 | 834 | int rc; |
14a43e69 BH |
835 | |
836 | opal_node = of_find_node_by_path("/ibm,opal"); | |
837 | if (!opal_node) { | |
08135139 | 838 | pr_warn("Device node not found\n"); |
14a43e69 BH |
839 | return -ENODEV; |
840 | } | |
2db29d28 BH |
841 | |
842 | /* Register OPAL consoles if any ports */ | |
7261aafc | 843 | consoles = of_find_node_by_path("/ibm,opal/consoles"); |
2db29d28 BH |
844 | if (consoles) { |
845 | for_each_child_of_node(consoles, np) { | |
846 | if (strcmp(np->name, "serial")) | |
847 | continue; | |
848 | of_platform_device_create(np, NULL, NULL); | |
849 | } | |
850 | of_node_put(consoles); | |
14a43e69 | 851 | } |
a125e092 | 852 | |
96e023e7 AP |
853 | /* Initialise OPAL messaging system */ |
854 | opal_message_init(); | |
855 | ||
856 | /* Initialise OPAL asynchronous completion interface */ | |
857 | opal_async_comp_init(); | |
858 | ||
859 | /* Initialise OPAL sensor interface */ | |
860 | opal_sensor_init(); | |
861 | ||
862 | /* Initialise OPAL hypervisor maintainence interrupt handling */ | |
863 | opal_hmi_handler_init(); | |
864 | ||
47083450 | 865 | /* Create i2c platform devices */ |
9e4f51bd | 866 | opal_pdev_init("ibm,opal-i2c"); |
47083450 | 867 | |
3013e173 OH |
868 | /* Handle non-volatile memory devices */ |
869 | opal_pdev_init("pmem-region"); | |
870 | ||
3bf57561 BH |
871 | /* Setup a heatbeat thread if requested by OPAL */ |
872 | opal_init_heartbeat(); | |
873 | ||
8f95faaa MS |
874 | /* Detect In-Memory Collection counters and create devices*/ |
875 | opal_imc_init_dev(); | |
876 | ||
c159b596 VH |
877 | /* Create leds platform devices */ |
878 | leds = of_find_node_by_path("/ibm,opal/leds"); | |
879 | if (leds) { | |
880 | of_platform_device_create(leds, "opal_leds", NULL); | |
881 | of_node_put(leds); | |
882 | } | |
883 | ||
9b4fffa1 AD |
884 | /* Initialise OPAL message log interface */ |
885 | opal_msglog_init(); | |
886 | ||
6f68b5e2 VH |
887 | /* Create "opal" kobject under /sys/firmware */ |
888 | rc = opal_sysfs_init(); | |
50bd6153 | 889 | if (rc == 0) { |
c8742f85 BH |
890 | /* Export symbol map to userspace */ |
891 | opal_export_symmap(); | |
b09c2ec4 VH |
892 | /* Setup dump region interface */ |
893 | opal_dump_region_init(); | |
774fea1a SS |
894 | /* Setup error log interface */ |
895 | rc = opal_elog_init(); | |
50bd6153 | 896 | /* Setup code update interface */ |
ed59190e | 897 | opal_flash_update_init(); |
c7e64b9c SS |
898 | /* Setup platform dump extract interface */ |
899 | opal_platform_dump_init(); | |
4029cd66 NG |
900 | /* Setup system parameters interface */ |
901 | opal_sys_param_init(); | |
9b4fffa1 AD |
902 | /* Setup message log sysfs interface. */ |
903 | opal_msglog_sysfs_init(); | |
50bd6153 | 904 | } |
6f68b5e2 | 905 | |
11fe909d MB |
906 | /* Export all properties */ |
907 | opal_export_attrs(); | |
908 | ||
0d7cd855 | 909 | /* Initialize platform devices: IPMI backend, PRD & flash interface */ |
9e4f51bd JM |
910 | opal_pdev_init("ibm,opal-ipmi"); |
911 | opal_pdev_init("ibm,opal-flash"); | |
912 | opal_pdev_init("ibm,opal-prd"); | |
ed59190e | 913 | |
43a1dd9b | 914 | /* Initialise platform device: oppanel interface */ |
9e4f51bd | 915 | opal_pdev_init("ibm,opal-oppanel"); |
43a1dd9b | 916 | |
affddff6 RC |
917 | /* Initialise OPAL kmsg dumper for flushing console on panic */ |
918 | opal_kmsg_init(); | |
919 | ||
cb8b340d SB |
920 | /* Initialise OPAL powercap interface */ |
921 | opal_powercap_init(); | |
922 | ||
8e84b2d1 SB |
923 | /* Initialise OPAL Power-Shifting-Ratio interface */ |
924 | opal_psr_init(); | |
925 | ||
bf957155 SB |
926 | /* Initialise OPAL sensor groups */ |
927 | opal_sensor_groups_init(); | |
928 | ||
14a43e69 BH |
929 | return 0; |
930 | } | |
b14726c5 | 931 | machine_subsys_initcall(powernv, opal_init); |
73ed148a BH |
932 | |
933 | void opal_shutdown(void) | |
934 | { | |
f7d98d18 | 935 | long rc = OPAL_BUSY; |
73ed148a | 936 | |
9f0fd049 | 937 | opal_event_shutdown(); |
f7d98d18 VH |
938 | |
939 | /* | |
940 | * Then sync with OPAL which ensure anything that can | |
941 | * potentially write to our memory has completed such | |
942 | * as an ongoing dump retrieval | |
943 | */ | |
944 | while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { | |
945 | rc = opal_sync_host_reboot(); | |
946 | if (rc == OPAL_BUSY) | |
947 | opal_poll_events(NULL); | |
948 | else | |
949 | mdelay(10); | |
950 | } | |
b09c2ec4 VH |
951 | |
952 | /* Unregister memory dump region */ | |
b962f5a4 SS |
953 | if (opal_check_token(OPAL_UNREGISTER_DUMP_REGION)) |
954 | opal_unregister_dump_region(OPAL_DUMP_REGION_LOG_BUF); | |
73ed148a | 955 | } |
e28b05e7 JS |
956 | |
957 | /* Export this so that test modules can use it */ | |
958 | EXPORT_SYMBOL_GPL(opal_invalid_call); | |
594fcb9e JK |
959 | EXPORT_SYMBOL_GPL(opal_xscom_read); |
960 | EXPORT_SYMBOL_GPL(opal_xscom_write); | |
608b286d JK |
961 | EXPORT_SYMBOL_GPL(opal_ipmi_send); |
962 | EXPORT_SYMBOL_GPL(opal_ipmi_recv); | |
ed59190e CB |
963 | EXPORT_SYMBOL_GPL(opal_flash_read); |
964 | EXPORT_SYMBOL_GPL(opal_flash_write); | |
965 | EXPORT_SYMBOL_GPL(opal_flash_erase); | |
0d7cd855 | 966 | EXPORT_SYMBOL_GPL(opal_prd_msg); |
3441f04b AB |
967 | |
968 | /* Convert a region of vmalloc memory to an opal sg list */ | |
969 | struct opal_sg_list *opal_vmalloc_to_sg_list(void *vmalloc_addr, | |
970 | unsigned long vmalloc_size) | |
971 | { | |
972 | struct opal_sg_list *sg, *first = NULL; | |
973 | unsigned long i = 0; | |
974 | ||
975 | sg = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
976 | if (!sg) | |
977 | goto nomem; | |
978 | ||
979 | first = sg; | |
980 | ||
981 | while (vmalloc_size > 0) { | |
982 | uint64_t data = vmalloc_to_pfn(vmalloc_addr) << PAGE_SHIFT; | |
983 | uint64_t length = min(vmalloc_size, PAGE_SIZE); | |
984 | ||
985 | sg->entry[i].data = cpu_to_be64(data); | |
986 | sg->entry[i].length = cpu_to_be64(length); | |
987 | i++; | |
988 | ||
989 | if (i >= SG_ENTRIES_PER_NODE) { | |
990 | struct opal_sg_list *next; | |
991 | ||
992 | next = kzalloc(PAGE_SIZE, GFP_KERNEL); | |
993 | if (!next) | |
994 | goto nomem; | |
995 | ||
996 | sg->length = cpu_to_be64( | |
997 | i * sizeof(struct opal_sg_entry) + 16); | |
998 | i = 0; | |
999 | sg->next = cpu_to_be64(__pa(next)); | |
1000 | sg = next; | |
1001 | } | |
1002 | ||
1003 | vmalloc_addr += length; | |
1004 | vmalloc_size -= length; | |
1005 | } | |
1006 | ||
1007 | sg->length = cpu_to_be64(i * sizeof(struct opal_sg_entry) + 16); | |
1008 | ||
1009 | return first; | |
1010 | ||
1011 | nomem: | |
1012 | pr_err("%s : Failed to allocate memory\n", __func__); | |
1013 | opal_free_sg_list(first); | |
1014 | return NULL; | |
1015 | } | |
1016 | ||
1017 | void opal_free_sg_list(struct opal_sg_list *sg) | |
1018 | { | |
1019 | while (sg) { | |
1020 | uint64_t next = be64_to_cpu(sg->next); | |
1021 | ||
1022 | kfree(sg); | |
1023 | ||
1024 | if (next) | |
1025 | sg = __va(next); | |
1026 | else | |
1027 | sg = NULL; | |
1028 | } | |
1029 | } | |
16b1d26e | 1030 | |
e3c5c2e0 CLG |
1031 | int opal_error_code(int rc) |
1032 | { | |
1033 | switch (rc) { | |
1034 | case OPAL_SUCCESS: return 0; | |
1035 | ||
1036 | case OPAL_PARAMETER: return -EINVAL; | |
1037 | case OPAL_ASYNC_COMPLETION: return -EINPROGRESS; | |
77adbd22 | 1038 | case OPAL_BUSY: |
e3c5c2e0 CLG |
1039 | case OPAL_BUSY_EVENT: return -EBUSY; |
1040 | case OPAL_NO_MEM: return -ENOMEM; | |
14aae78f | 1041 | case OPAL_PERMISSION: return -EPERM; |
e3c5c2e0 CLG |
1042 | |
1043 | case OPAL_UNSUPPORTED: return -EIO; | |
1044 | case OPAL_HARDWARE: return -EIO; | |
1045 | case OPAL_INTERNAL_ERROR: return -EIO; | |
cb8b340d | 1046 | case OPAL_TIMEOUT: return -ETIMEDOUT; |
e3c5c2e0 CLG |
1047 | default: |
1048 | pr_err("%s: unexpected OPAL error %d\n", __func__, rc); | |
1049 | return -EIO; | |
1050 | } | |
1051 | } | |
1052 | ||
1d0761d2 AP |
1053 | void powernv_set_nmmu_ptcr(unsigned long ptcr) |
1054 | { | |
1055 | int rc; | |
1056 | ||
1057 | if (firmware_has_feature(FW_FEATURE_OPAL)) { | |
1058 | rc = opal_nmmu_set_ptcr(-1UL, ptcr); | |
1059 | if (rc != OPAL_SUCCESS && rc != OPAL_UNSUPPORTED) | |
1060 | pr_warn("%s: Unable to set nest mmu ptcr\n", __func__); | |
1061 | } | |
1062 | } | |
1063 | ||
16b1d26e NG |
1064 | EXPORT_SYMBOL_GPL(opal_poll_events); |
1065 | EXPORT_SYMBOL_GPL(opal_rtc_read); | |
1066 | EXPORT_SYMBOL_GPL(opal_rtc_write); | |
1067 | EXPORT_SYMBOL_GPL(opal_tpo_read); | |
1068 | EXPORT_SYMBOL_GPL(opal_tpo_write); | |
47083450 | 1069 | EXPORT_SYMBOL_GPL(opal_i2c_request); |
c159b596 VH |
1070 | /* Export these symbols for PowerNV LED class driver */ |
1071 | EXPORT_SYMBOL_GPL(opal_leds_get_ind); | |
1072 | EXPORT_SYMBOL_GPL(opal_leds_set_ind); | |
43a1dd9b SJS |
1073 | /* Export this symbol for PowerNV Operator Panel class driver */ |
1074 | EXPORT_SYMBOL_GPL(opal_write_oppanel_async); | |
ffe6d810 PM |
1075 | /* Export this for KVM */ |
1076 | EXPORT_SYMBOL_GPL(opal_int_set_mfrr); | |
5af50993 | 1077 | EXPORT_SYMBOL_GPL(opal_int_eoi); |
77adbd22 | 1078 | EXPORT_SYMBOL_GPL(opal_error_code); |