1 /*
2 * ACPI implementation
3 *
4 * Copyright (c) 2006 Fabrice Bellard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License version 2.1 as published by the Free Software Foundation.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, see <http://www.gnu.org/licenses/>
17 *
18 * Contributions after 2012-01-13 are licensed under the terms of the
19 * GNU GPL, version 2 or (at your option) any later version.
20 */
21
22 #include "qemu/osdep.h"
23 #include "hw/irq.h"
24 #include "hw/acpi/acpi.h"
25 #include "hw/nvram/fw_cfg.h"
26 #include "qemu/config-file.h"
27 #include "qapi/error.h"
28 #include "qapi/opts-visitor.h"
29 #include "qapi/qapi-events-run-state.h"
30 #include "qapi/qapi-visit-acpi.h"
31 #include "qemu/error-report.h"
32 #include "qemu/module.h"
33 #include "qemu/option.h"
34 #include "system/runstate.h"
35 #include "trace.h"
36
37 struct acpi_table_header {
38 uint16_t _length; /* our length, not actual part of the hdr */
39 /* allows easier parsing for fw_cfg clients */
40 char sig[4]
41 QEMU_NONSTRING; /* ACPI signature (4 ASCII characters) */
42 uint32_t length; /* Length of table, in bytes, including header */
43 uint8_t revision; /* ACPI Specification minor version # */
44 uint8_t checksum; /* To make sum of entire table == 0 */
45 char oem_id[6]
46 QEMU_NONSTRING; /* OEM identification */
47 char oem_table_id[8]
48 QEMU_NONSTRING; /* OEM table identification */
49 uint32_t oem_revision; /* OEM revision number */
50 char asl_compiler_id[4]
51 QEMU_NONSTRING; /* ASL compiler vendor ID */
52 uint32_t asl_compiler_revision; /* ASL compiler revision number */
53 } QEMU_PACKED;
54
55 #define ACPI_TABLE_HDR_SIZE sizeof(struct acpi_table_header)
56 #define ACPI_TABLE_PFX_SIZE sizeof(uint16_t) /* size of the extra prefix */
57
58 static const char unsigned dfl_hdr[ACPI_TABLE_HDR_SIZE - ACPI_TABLE_PFX_SIZE] =
59 "QEMU\0\0\0\0\1\0" /* sig (4), len(4), revno (1), csum (1) */
60 "QEMUQEQEMUQEMU\1\0\0\0" /* OEM id (6), table (8), revno (4) */
61 "QEMU\1\0\0\0" /* ASL compiler ID (4), version (4) */
62 ;
63
64 char unsigned *acpi_tables;
65 size_t acpi_tables_len;
66
67 static QemuOptsList qemu_acpi_opts = {
68 .name = "acpi",
69 .implied_opt_name = "data",
70 .head = QTAILQ_HEAD_INITIALIZER(qemu_acpi_opts.head),
71 .desc = { { 0 } } /* validated with OptsVisitor */
72 };
73
acpi_register_config(void)74 static void acpi_register_config(void)
75 {
76 qemu_add_opts(&qemu_acpi_opts);
77 }
78
79 opts_init(acpi_register_config);
80
acpi_builtin(void)81 bool acpi_builtin(void)
82 {
83 return true;
84 }
85
acpi_checksum(const uint8_t * data,int len)86 static int acpi_checksum(const uint8_t *data, int len)
87 {
88 int sum, i;
89 sum = 0;
90 for (i = 0; i < len; i++) {
91 sum += data[i];
92 }
93 return (-sum) & 0xff;
94 }
95
96
97 /* Install a copy of the ACPI table specified in @blob.
98 *
99 * If @has_header is set, @blob starts with the System Description Table Header
100 * structure. Otherwise, "dfl_hdr" is prepended. In any case, each header field
101 * is optionally overwritten from @hdrs.
102 *
103 * It is valid to call this function with
104 * (@blob == NULL && bloblen == 0 && !has_header).
105 *
106 * @hdrs->file and @hdrs->data are ignored.
107 *
108 * SIZE_MAX is considered "infinity" in this function.
109 *
110 * The number of tables that can be installed is not limited, but the 16-bit
111 * counter at the beginning of "acpi_tables" wraps around after UINT16_MAX.
112 */
acpi_table_install(const char unsigned * blob,size_t bloblen,bool has_header,const struct AcpiTableOptions * hdrs,Error ** errp)113 static void acpi_table_install(const char unsigned *blob, size_t bloblen,
114 bool has_header,
115 const struct AcpiTableOptions *hdrs,
116 Error **errp)
117 {
118 size_t body_start;
119 const char unsigned *hdr_src;
120 size_t body_size, acpi_payload_size;
121 struct acpi_table_header *ext_hdr;
122 unsigned changed_fields;
123
124 /* Calculate where the ACPI table body starts within the blob, plus where
125 * to copy the ACPI table header from.
126 */
127 if (has_header) {
128 /* _length | ACPI header in blob | blob body
129 * ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^
130 * ACPI_TABLE_PFX_SIZE sizeof dfl_hdr body_size
131 * == body_start
132 *
133 * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
134 * acpi_payload_size == bloblen
135 */
136 body_start = sizeof dfl_hdr;
137
138 if (bloblen < body_start) {
139 error_setg(errp, "ACPI table claiming to have header is too "
140 "short, available: %zu, expected: %zu", bloblen,
141 body_start);
142 return;
143 }
144 hdr_src = blob;
145 } else {
146 /* _length | ACPI header in template | blob body
147 * ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^
148 * ACPI_TABLE_PFX_SIZE sizeof dfl_hdr body_size
149 * == bloblen
150 *
151 * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
152 * acpi_payload_size
153 */
154 body_start = 0;
155 hdr_src = dfl_hdr;
156 }
157 body_size = bloblen - body_start;
158 acpi_payload_size = sizeof dfl_hdr + body_size;
159
160 if (acpi_payload_size > UINT16_MAX) {
161 error_setg(errp, "ACPI table too big, requested: %zu, max: %u",
162 acpi_payload_size, (unsigned)UINT16_MAX);
163 return;
164 }
165
166 /* We won't fail from here on. Initialize / extend the globals. */
167 if (acpi_tables == NULL) {
168 acpi_tables_len = sizeof(uint16_t);
169 acpi_tables = g_malloc0(acpi_tables_len);
170 }
171
172 acpi_tables = g_realloc(acpi_tables, acpi_tables_len +
173 ACPI_TABLE_PFX_SIZE +
174 sizeof dfl_hdr + body_size);
175
176 ext_hdr = (struct acpi_table_header *)(acpi_tables + acpi_tables_len);
177 acpi_tables_len += ACPI_TABLE_PFX_SIZE;
178
179 memcpy(acpi_tables + acpi_tables_len, hdr_src, sizeof dfl_hdr);
180 acpi_tables_len += sizeof dfl_hdr;
181
182 if (blob != NULL) {
183 memcpy(acpi_tables + acpi_tables_len, blob + body_start, body_size);
184 acpi_tables_len += body_size;
185 }
186
187 /* increase number of tables */
188 stw_le_p(acpi_tables, lduw_le_p(acpi_tables) + 1u);
189
190 /* Update the header fields. The strings need not be NUL-terminated. */
191 changed_fields = 0;
192 ext_hdr->_length = cpu_to_le16(acpi_payload_size);
193
194 if (hdrs->sig) {
195 strncpy(ext_hdr->sig, hdrs->sig, sizeof ext_hdr->sig);
196 ++changed_fields;
197 }
198
199 if (has_header && le32_to_cpu(ext_hdr->length) != acpi_payload_size) {
200 warn_report("ACPI table has wrong length, header says "
201 "%" PRIu32 ", actual size %zu bytes",
202 le32_to_cpu(ext_hdr->length), acpi_payload_size);
203 }
204 ext_hdr->length = cpu_to_le32(acpi_payload_size);
205
206 if (hdrs->has_rev) {
207 ext_hdr->revision = hdrs->rev;
208 ++changed_fields;
209 }
210
211 ext_hdr->checksum = 0;
212
213 if (hdrs->oem_id) {
214 strncpy(ext_hdr->oem_id, hdrs->oem_id, sizeof ext_hdr->oem_id);
215 ++changed_fields;
216 }
217 if (hdrs->oem_table_id) {
218 strncpy(ext_hdr->oem_table_id, hdrs->oem_table_id,
219 sizeof ext_hdr->oem_table_id);
220 ++changed_fields;
221 }
222 if (hdrs->has_oem_rev) {
223 ext_hdr->oem_revision = cpu_to_le32(hdrs->oem_rev);
224 ++changed_fields;
225 }
226 if (hdrs->asl_compiler_id) {
227 strncpy(ext_hdr->asl_compiler_id, hdrs->asl_compiler_id,
228 sizeof ext_hdr->asl_compiler_id);
229 ++changed_fields;
230 }
231 if (hdrs->has_asl_compiler_rev) {
232 ext_hdr->asl_compiler_revision = cpu_to_le32(hdrs->asl_compiler_rev);
233 ++changed_fields;
234 }
235
236 if (!has_header && changed_fields == 0) {
237 warn_report("ACPI table: no headers are specified");
238 }
239
240 /* recalculate checksum */
241 ext_hdr->checksum = acpi_checksum((const char unsigned *)ext_hdr +
242 ACPI_TABLE_PFX_SIZE, acpi_payload_size);
243 }
244
acpi_table_add(const QemuOpts * opts,Error ** errp)245 void acpi_table_add(const QemuOpts *opts, Error **errp)
246 {
247 AcpiTableOptions *hdrs = NULL;
248 char **pathnames = NULL;
249 char **cur;
250 size_t bloblen = 0;
251 char unsigned *blob = NULL;
252
253 {
254 Visitor *v;
255
256 v = opts_visitor_new(opts);
257 visit_type_AcpiTableOptions(v, NULL, &hdrs, errp);
258 visit_free(v);
259 }
260
261 if (!hdrs) {
262 goto out;
263 }
264 if (!hdrs->file == !hdrs->data) {
265 error_setg(errp, "'-acpitable' requires one of 'data' or 'file'");
266 goto out;
267 }
268
269 pathnames = g_strsplit(hdrs->file ?: hdrs->data, ":", 0);
270 if (pathnames == NULL || pathnames[0] == NULL) {
271 error_setg(errp, "'-acpitable' requires at least one pathname");
272 goto out;
273 }
274
275 /* now read in the data files, reallocating buffer as needed */
276 for (cur = pathnames; *cur; ++cur) {
277 int fd = open(*cur, O_RDONLY | O_BINARY);
278
279 if (fd < 0) {
280 error_setg(errp, "can't open file %s: %s", *cur, strerror(errno));
281 goto out;
282 }
283
284 for (;;) {
285 char unsigned data[8192];
286 ssize_t r;
287
288 r = read(fd, data, sizeof data);
289 if (r == 0) {
290 break;
291 } else if (r > 0) {
292 blob = g_realloc(blob, bloblen + r);
293 memcpy(blob + bloblen, data, r);
294 bloblen += r;
295 } else if (errno != EINTR) {
296 error_setg(errp, "can't read file %s: %s", *cur,
297 strerror(errno));
298 close(fd);
299 goto out;
300 }
301 }
302
303 close(fd);
304 }
305
306 acpi_table_install(blob, bloblen, !!hdrs->file, hdrs, errp);
307
308 out:
309 g_free(blob);
310 g_strfreev(pathnames);
311 qapi_free_AcpiTableOptions(hdrs);
312 }
313
acpi_table_len(void * current)314 unsigned acpi_table_len(void *current)
315 {
316 struct acpi_table_header *hdr = current - sizeof(hdr->_length);
317 return hdr->_length;
318 }
319
320 static
acpi_table_hdr(void * h)321 void *acpi_table_hdr(void *h)
322 {
323 struct acpi_table_header *hdr = h;
324 return &hdr->sig;
325 }
326
acpi_table_first(void)327 uint8_t *acpi_table_first(void)
328 {
329 if (!acpi_tables) {
330 return NULL;
331 }
332 return acpi_table_hdr(acpi_tables + ACPI_TABLE_PFX_SIZE);
333 }
334
acpi_table_next(uint8_t * current)335 uint8_t *acpi_table_next(uint8_t *current)
336 {
337 uint8_t *next = current + acpi_table_len(current);
338
339 if (next - acpi_tables >= acpi_tables_len) {
340 return NULL;
341 } else {
342 return acpi_table_hdr(next);
343 }
344 }
345
acpi_get_slic_oem(AcpiSlicOem * oem)346 int acpi_get_slic_oem(AcpiSlicOem *oem)
347 {
348 uint8_t *u;
349
350 for (u = acpi_table_first(); u; u = acpi_table_next(u)) {
351 struct acpi_table_header *hdr = (void *)(u - sizeof(hdr->_length));
352
353 if (memcmp(hdr->sig, "SLIC", 4) == 0) {
354 oem->id = g_strndup(hdr->oem_id, 6);
355 oem->table_id = g_strndup(hdr->oem_table_id, 8);
356 return 0;
357 }
358 }
359 return -1;
360 }
361
acpi_notify_wakeup(Notifier * notifier,void * data)362 static void acpi_notify_wakeup(Notifier *notifier, void *data)
363 {
364 ACPIREGS *ar = container_of(notifier, ACPIREGS, wakeup);
365 WakeupReason *reason = data;
366
367 switch (*reason) {
368 case QEMU_WAKEUP_REASON_RTC:
369 ar->pm1.evt.sts |=
370 (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_RT_CLOCK_STATUS);
371 break;
372 case QEMU_WAKEUP_REASON_PMTIMER:
373 ar->pm1.evt.sts |=
374 (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_TIMER_STATUS);
375 break;
376 case QEMU_WAKEUP_REASON_OTHER:
377 /* ACPI_BITMASK_WAKE_STATUS should be set on resume.
378 Pretend that resume was caused by power button */
379 ar->pm1.evt.sts |=
380 (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_POWER_BUTTON_STATUS);
381 break;
382 default:
383 break;
384 }
385 }
386
387 /* ACPI PM1a EVT */
acpi_pm1_evt_get_sts(ACPIREGS * ar)388 uint16_t acpi_pm1_evt_get_sts(ACPIREGS *ar)
389 {
390 /* Compare ns-clock, not PM timer ticks, because
391 acpi_pm_tmr_update function uses ns for setting the timer. */
392 int64_t d = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
393 if (d >= muldiv64(ar->tmr.overflow_time,
394 NANOSECONDS_PER_SECOND, PM_TIMER_FREQUENCY)) {
395 ar->pm1.evt.sts |= ACPI_BITMASK_TIMER_STATUS;
396 }
397 return ar->pm1.evt.sts;
398 }
399
acpi_pm1_evt_write_sts(ACPIREGS * ar,uint16_t val)400 static void acpi_pm1_evt_write_sts(ACPIREGS *ar, uint16_t val)
401 {
402 uint16_t pm1_sts = acpi_pm1_evt_get_sts(ar);
403 if (pm1_sts & val & ACPI_BITMASK_TIMER_STATUS) {
404 /* if TMRSTS is reset, then compute the new overflow time */
405 acpi_pm_tmr_calc_overflow_time(ar);
406 }
407 ar->pm1.evt.sts &= ~val;
408 }
409
acpi_pm1_evt_write_en(ACPIREGS * ar,uint16_t val)410 static void acpi_pm1_evt_write_en(ACPIREGS *ar, uint16_t val)
411 {
412 ar->pm1.evt.en = val;
413 qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC,
414 val & ACPI_BITMASK_RT_CLOCK_ENABLE);
415 qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER,
416 val & ACPI_BITMASK_TIMER_ENABLE);
417 }
418
acpi_pm1_evt_power_down(ACPIREGS * ar)419 void acpi_pm1_evt_power_down(ACPIREGS *ar)
420 {
421 if (ar->pm1.evt.en & ACPI_BITMASK_POWER_BUTTON_ENABLE) {
422 ar->pm1.evt.sts |= ACPI_BITMASK_POWER_BUTTON_STATUS;
423 ar->tmr.update_sci(ar);
424 }
425 }
426
acpi_pm1_evt_reset(ACPIREGS * ar)427 void acpi_pm1_evt_reset(ACPIREGS *ar)
428 {
429 ar->pm1.evt.sts = 0;
430 ar->pm1.evt.en = 0;
431 qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC, 0);
432 qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER, 0);
433 }
434
acpi_pm_evt_read(void * opaque,hwaddr addr,unsigned width)435 static uint64_t acpi_pm_evt_read(void *opaque, hwaddr addr, unsigned width)
436 {
437 ACPIREGS *ar = opaque;
438 switch (addr) {
439 case 0:
440 return acpi_pm1_evt_get_sts(ar);
441 case 2:
442 return ar->pm1.evt.en;
443 default:
444 return 0;
445 }
446 }
447
acpi_pm_evt_write(void * opaque,hwaddr addr,uint64_t val,unsigned width)448 static void acpi_pm_evt_write(void *opaque, hwaddr addr, uint64_t val,
449 unsigned width)
450 {
451 ACPIREGS *ar = opaque;
452 switch (addr) {
453 case 0:
454 acpi_pm1_evt_write_sts(ar, val);
455 ar->pm1.evt.update_sci(ar);
456 break;
457 case 2:
458 acpi_pm1_evt_write_en(ar, val);
459 ar->pm1.evt.update_sci(ar);
460 break;
461 }
462 }
463
464 static const MemoryRegionOps acpi_pm_evt_ops = {
465 .read = acpi_pm_evt_read,
466 .write = acpi_pm_evt_write,
467 .impl.min_access_size = 2,
468 .valid.min_access_size = 1,
469 .valid.max_access_size = 2,
470 .endianness = DEVICE_LITTLE_ENDIAN,
471 };
472
acpi_pm1_evt_init(ACPIREGS * ar,acpi_update_sci_fn update_sci,MemoryRegion * parent)473 void acpi_pm1_evt_init(ACPIREGS *ar, acpi_update_sci_fn update_sci,
474 MemoryRegion *parent)
475 {
476 ar->pm1.evt.update_sci = update_sci;
477 memory_region_init_io(&ar->pm1.evt.io, memory_region_owner(parent),
478 &acpi_pm_evt_ops, ar, "acpi-evt", 4);
479 memory_region_add_subregion(parent, 0, &ar->pm1.evt.io);
480 }
481
482 /* ACPI PM_TMR */
acpi_pm_tmr_update(ACPIREGS * ar,bool enable)483 void acpi_pm_tmr_update(ACPIREGS *ar, bool enable)
484 {
485 int64_t expire_time;
486
487 /* schedule a timer interruption if needed */
488 if (enable) {
489 expire_time = muldiv64(ar->tmr.overflow_time, NANOSECONDS_PER_SECOND,
490 PM_TIMER_FREQUENCY);
491 timer_mod(ar->tmr.timer, expire_time);
492 } else {
493 timer_del(ar->tmr.timer);
494 }
495 }
496
acpi_pm_tmr_get_clock(void)497 static inline int64_t acpi_pm_tmr_get_clock(void)
498 {
499 return muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), PM_TIMER_FREQUENCY,
500 NANOSECONDS_PER_SECOND);
501 }
502
acpi_pm_tmr_calc_overflow_time(ACPIREGS * ar)503 void acpi_pm_tmr_calc_overflow_time(ACPIREGS *ar)
504 {
505 int64_t d = acpi_pm_tmr_get_clock();
506 ar->tmr.overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
507 }
508
acpi_pm_tmr_get(ACPIREGS * ar)509 static uint32_t acpi_pm_tmr_get(ACPIREGS *ar)
510 {
511 uint32_t d = acpi_pm_tmr_get_clock();
512 return d & 0xffffff;
513 }
514
acpi_pm_tmr_timer(void * opaque)515 static void acpi_pm_tmr_timer(void *opaque)
516 {
517 ACPIREGS *ar = opaque;
518
519 qemu_system_wakeup_request(QEMU_WAKEUP_REASON_PMTIMER, NULL);
520 ar->tmr.update_sci(ar);
521 }
522
acpi_pm_tmr_read(void * opaque,hwaddr addr,unsigned width)523 static uint64_t acpi_pm_tmr_read(void *opaque, hwaddr addr, unsigned width)
524 {
525 return acpi_pm_tmr_get(opaque);
526 }
527
acpi_pm_tmr_write(void * opaque,hwaddr addr,uint64_t val,unsigned width)528 static void acpi_pm_tmr_write(void *opaque, hwaddr addr, uint64_t val,
529 unsigned width)
530 {
531 /* nothing */
532 }
533
534 static const MemoryRegionOps acpi_pm_tmr_ops = {
535 .read = acpi_pm_tmr_read,
536 .write = acpi_pm_tmr_write,
537 .impl.min_access_size = 4,
538 .valid.min_access_size = 1,
539 .valid.max_access_size = 4,
540 .endianness = DEVICE_LITTLE_ENDIAN,
541 };
542
acpi_pm_tmr_init(ACPIREGS * ar,acpi_update_sci_fn update_sci,MemoryRegion * parent)543 void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci,
544 MemoryRegion *parent)
545 {
546 ar->tmr.update_sci = update_sci;
547 ar->tmr.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, acpi_pm_tmr_timer, ar);
548 memory_region_init_io(&ar->tmr.io, memory_region_owner(parent),
549 &acpi_pm_tmr_ops, ar, "acpi-tmr", 4);
550 memory_region_add_subregion(parent, 8, &ar->tmr.io);
551 }
552
acpi_pm_tmr_reset(ACPIREGS * ar)553 void acpi_pm_tmr_reset(ACPIREGS *ar)
554 {
555 ar->tmr.overflow_time = 0;
556 timer_del(ar->tmr.timer);
557 }
558
559 /* ACPI PM1aCNT */
acpi_pm1_cnt_update(ACPIREGS * ar,bool sci_enable,bool sci_disable)560 void acpi_pm1_cnt_update(ACPIREGS *ar,
561 bool sci_enable, bool sci_disable)
562 {
563 /* ACPI specs 3.0, 4.7.2.5 */
564 if (ar->pm1.cnt.acpi_only) {
565 return;
566 }
567
568 if (sci_enable) {
569 ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE;
570 } else if (sci_disable) {
571 ar->pm1.cnt.cnt &= ~ACPI_BITMASK_SCI_ENABLE;
572 }
573 }
574
acpi_pm_cnt_read(void * opaque,hwaddr addr,unsigned width)575 static uint64_t acpi_pm_cnt_read(void *opaque, hwaddr addr, unsigned width)
576 {
577 ACPIREGS *ar = opaque;
578 return ar->pm1.cnt.cnt >> addr * 8;
579 }
580
acpi_pm_cnt_write(void * opaque,hwaddr addr,uint64_t val,unsigned width)581 static void acpi_pm_cnt_write(void *opaque, hwaddr addr, uint64_t val,
582 unsigned width)
583 {
584 ACPIREGS *ar = opaque;
585
586 if (addr == 1) {
587 val = val << 8 | (ar->pm1.cnt.cnt & 0xff);
588 }
589 ar->pm1.cnt.cnt = val & ~(ACPI_BITMASK_SLEEP_ENABLE);
590
591 if (val & ACPI_BITMASK_SLEEP_ENABLE) {
592 /* change suspend type */
593 uint16_t sus_typ = (val >> 10) & 7;
594 switch (sus_typ) {
595 case 0: /* soft power off */
596 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
597 break;
598 case 1:
599 qemu_system_suspend_request();
600 break;
601 default:
602 if (sus_typ == ar->pm1.cnt.s4_val) { /* S4 request */
603 qapi_event_send_suspend_disk();
604 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
605 }
606 break;
607 }
608 }
609 }
610
611 static const MemoryRegionOps acpi_pm_cnt_ops = {
612 .read = acpi_pm_cnt_read,
613 .write = acpi_pm_cnt_write,
614 .impl.min_access_size = 2,
615 .valid.min_access_size = 1,
616 .valid.max_access_size = 2,
617 .endianness = DEVICE_LITTLE_ENDIAN,
618 };
619
acpi_pm1_cnt_init(ACPIREGS * ar,MemoryRegion * parent,bool disable_s3,bool disable_s4,uint8_t s4_val,bool acpi_only)620 void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent,
621 bool disable_s3, bool disable_s4, uint8_t s4_val,
622 bool acpi_only)
623 {
624 FWCfgState *fw_cfg;
625
626 ar->pm1.cnt.s4_val = s4_val;
627 ar->pm1.cnt.acpi_only = acpi_only;
628 ar->wakeup.notify = acpi_notify_wakeup;
629 qemu_register_wakeup_notifier(&ar->wakeup);
630
631 /*
632 * Register wake-up support in QMP query-current-machine API
633 */
634 qemu_register_wakeup_support();
635
636 memory_region_init_io(&ar->pm1.cnt.io, memory_region_owner(parent),
637 &acpi_pm_cnt_ops, ar, "acpi-cnt", 2);
638 memory_region_add_subregion(parent, 4, &ar->pm1.cnt.io);
639
640 fw_cfg = fw_cfg_find();
641 if (fw_cfg) {
642 uint8_t suspend[6] = {128, 0, 0, 129, 128, 128};
643 suspend[3] = 1 | ((!disable_s3) << 7);
644 suspend[4] = s4_val | ((!disable_s4) << 7);
645
646 fw_cfg_add_file(fw_cfg, "etc/system-states", g_memdup(suspend, 6), 6);
647 }
648 }
649
acpi_pm1_cnt_reset(ACPIREGS * ar)650 void acpi_pm1_cnt_reset(ACPIREGS *ar)
651 {
652 ar->pm1.cnt.cnt = 0;
653 if (ar->pm1.cnt.acpi_only) {
654 ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE;
655 }
656 }
657
658 /* ACPI GPE */
acpi_gpe_init(ACPIREGS * ar,uint8_t len)659 void acpi_gpe_init(ACPIREGS *ar, uint8_t len)
660 {
661 ar->gpe.len = len;
662 /* Only first len / 2 bytes are ever used,
663 * but the caller in ich9.c migrates full len bytes.
664 * TODO: fix ich9.c and drop the extra allocation.
665 */
666 ar->gpe.sts = g_malloc0(len);
667 ar->gpe.en = g_malloc0(len);
668 }
669
acpi_gpe_reset(ACPIREGS * ar)670 void acpi_gpe_reset(ACPIREGS *ar)
671 {
672 memset(ar->gpe.sts, 0, ar->gpe.len / 2);
673 memset(ar->gpe.en, 0, ar->gpe.len / 2);
674 }
675
acpi_gpe_ioport_get_ptr(ACPIREGS * ar,uint32_t addr)676 static uint8_t *acpi_gpe_ioport_get_ptr(ACPIREGS *ar, uint32_t addr)
677 {
678 uint8_t *cur = NULL;
679
680 if (addr < ar->gpe.len / 2) {
681 cur = ar->gpe.sts + addr;
682 } else if (addr < ar->gpe.len) {
683 cur = ar->gpe.en + addr - ar->gpe.len / 2;
684 } else {
685 abort();
686 }
687
688 return cur;
689 }
690
acpi_gpe_ioport_writeb(ACPIREGS * ar,uint32_t addr,uint32_t val)691 void acpi_gpe_ioport_writeb(ACPIREGS *ar, uint32_t addr, uint32_t val)
692 {
693 uint8_t *cur;
694
695 cur = acpi_gpe_ioport_get_ptr(ar, addr);
696 if (addr < ar->gpe.len / 2) {
697 trace_acpi_gpe_sts_ioport_writeb(addr, val);
698 /* GPE_STS */
699 *cur = (*cur) & ~val;
700 } else if (addr < ar->gpe.len) {
701 trace_acpi_gpe_en_ioport_writeb(addr - (ar->gpe.len / 2), val);
702 /* GPE_EN */
703 *cur = val;
704 } else {
705 abort();
706 }
707 }
708
acpi_gpe_ioport_readb(ACPIREGS * ar,uint32_t addr)709 uint32_t acpi_gpe_ioport_readb(ACPIREGS *ar, uint32_t addr)
710 {
711 uint8_t *cur;
712 uint32_t val;
713
714 cur = acpi_gpe_ioport_get_ptr(ar, addr);
715 val = 0;
716 if (cur != NULL) {
717 val = *cur;
718 }
719
720 if (addr < ar->gpe.len / 2) {
721 trace_acpi_gpe_sts_ioport_readb(addr, val);
722 } else {
723 trace_acpi_gpe_en_ioport_readb(addr - (ar->gpe.len / 2), val);
724 }
725
726 return val;
727 }
728
acpi_send_gpe_event(ACPIREGS * ar,qemu_irq irq,AcpiEventStatusBits status)729 void acpi_send_gpe_event(ACPIREGS *ar, qemu_irq irq,
730 AcpiEventStatusBits status)
731 {
732 ar->gpe.sts[0] |= status;
733 acpi_update_sci(ar, irq);
734 }
735
acpi_update_sci(ACPIREGS * regs,qemu_irq irq)736 void acpi_update_sci(ACPIREGS *regs, qemu_irq irq)
737 {
738 int sci_level, pm1a_sts;
739
740 pm1a_sts = acpi_pm1_evt_get_sts(regs);
741
742 sci_level = ((pm1a_sts &
743 regs->pm1.evt.en & ACPI_BITMASK_PM1_COMMON_ENABLED) != 0) ||
744 ((regs->gpe.sts[0] & regs->gpe.en[0]) != 0);
745
746 qemu_set_irq(irq, sci_level);
747
748 /* schedule a timer interruption if needed */
749 acpi_pm_tmr_update(regs,
750 (regs->pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
751 !(pm1a_sts & ACPI_BITMASK_TIMER_STATUS));
752 }
753