hw/arm/bcm2836: Only provide "enabled-cpus" property to multicore SoCs
[qemu.git] / hw / s390x / ipl.c
1 /*
2 * bootloader support
3 *
4 * Copyright IBM, Corp. 2012, 2020
5 *
6 * Authors:
7 * Christian Borntraeger <borntraeger@de.ibm.com>
8 * Janosch Frank <frankja@linux.ibm.com>
9 *
10 * This work is licensed under the terms of the GNU GPL, version 2 or (at your
11 * option) any later version. See the COPYING file in the top-level directory.
12 *
13 */
14
15 #include "qemu/osdep.h"
16 #include "qemu-common.h"
17 #include "qapi/error.h"
18 #include "sysemu/reset.h"
19 #include "sysemu/runstate.h"
20 #include "sysemu/sysemu.h"
21 #include "sysemu/tcg.h"
22 #include "cpu.h"
23 #include "elf.h"
24 #include "hw/loader.h"
25 #include "hw/qdev-properties.h"
26 #include "hw/boards.h"
27 #include "hw/s390x/virtio-ccw.h"
28 #include "hw/s390x/vfio-ccw.h"
29 #include "hw/s390x/css.h"
30 #include "hw/s390x/ebcdic.h"
31 #include "hw/s390x/pv.h"
32 #include "ipl.h"
33 #include "qemu/error-report.h"
34 #include "qemu/config-file.h"
35 #include "qemu/cutils.h"
36 #include "qemu/option.h"
37 #include "exec/exec-all.h"
38
39 #define KERN_IMAGE_START 0x010000UL
40 #define LINUX_MAGIC_ADDR 0x010008UL
41 #define KERN_PARM_AREA 0x010480UL
42 #define INITRD_START 0x800000UL
43 #define INITRD_PARM_START 0x010408UL
44 #define PARMFILE_START 0x001000UL
45 #define ZIPL_IMAGE_START 0x009000UL
46 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
47
48 static bool iplb_extended_needed(void *opaque)
49 {
50 S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
51
52 return ipl->iplbext_migration;
53 }
54
55 static const VMStateDescription vmstate_iplb_extended = {
56 .name = "ipl/iplb_extended",
57 .version_id = 0,
58 .minimum_version_id = 0,
59 .needed = iplb_extended_needed,
60 .fields = (VMStateField[]) {
61 VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
62 VMSTATE_END_OF_LIST()
63 }
64 };
65
66 static const VMStateDescription vmstate_iplb = {
67 .name = "ipl/iplb",
68 .version_id = 0,
69 .minimum_version_id = 0,
70 .fields = (VMStateField[]) {
71 VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
72 VMSTATE_UINT16(devno, IplParameterBlock),
73 VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
74 VMSTATE_END_OF_LIST()
75 },
76 .subsections = (const VMStateDescription*[]) {
77 &vmstate_iplb_extended,
78 NULL
79 }
80 };
81
82 static const VMStateDescription vmstate_ipl = {
83 .name = "ipl",
84 .version_id = 0,
85 .minimum_version_id = 0,
86 .fields = (VMStateField[]) {
87 VMSTATE_UINT64(compat_start_addr, S390IPLState),
88 VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
89 VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
90 VMSTATE_BOOL(iplb_valid, S390IPLState),
91 VMSTATE_UINT8(cssid, S390IPLState),
92 VMSTATE_UINT8(ssid, S390IPLState),
93 VMSTATE_UINT16(devno, S390IPLState),
94 VMSTATE_END_OF_LIST()
95 }
96 };
97
98 static S390IPLState *get_ipl_device(void)
99 {
100 return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
101 }
102
103 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
104 {
105 uint64_t dstaddr = *(uint64_t *) opaque;
106 /*
107 * Assuming that our s390-ccw.img was linked for starting at address 0,
108 * we can simply add the destination address for the final location
109 */
110 return srcaddr + dstaddr;
111 }
112
113 static void s390_ipl_realize(DeviceState *dev, Error **errp)
114 {
115 S390IPLState *ipl = S390_IPL(dev);
116 uint32_t *ipl_psw;
117 uint64_t pentry;
118 char *magic;
119 int kernel_size;
120
121 int bios_size;
122 char *bios_filename;
123
124 /*
125 * Always load the bios if it was enforced,
126 * even if an external kernel has been defined.
127 */
128 if (!ipl->kernel || ipl->enforce_bios) {
129 uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
130
131 if (bios_name == NULL) {
132 bios_name = ipl->firmware;
133 }
134
135 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
136 if (bios_filename == NULL) {
137 error_setg(errp, "could not find stage1 bootloader");
138 return;
139 }
140
141 bios_size = load_elf(bios_filename, NULL,
142 bios_translate_addr, &fwbase,
143 &ipl->bios_start_addr, NULL, NULL, NULL, 1,
144 EM_S390, 0, 0);
145 if (bios_size > 0) {
146 /* Adjust ELF start address to final location */
147 ipl->bios_start_addr += fwbase;
148 } else {
149 /* Try to load non-ELF file */
150 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
151 4096);
152 ipl->bios_start_addr = ZIPL_IMAGE_START;
153 }
154 g_free(bios_filename);
155
156 if (bios_size == -1) {
157 error_setg(errp, "could not load bootloader '%s'", bios_name);
158 return;
159 }
160
161 /* default boot target is the bios */
162 ipl->start_addr = ipl->bios_start_addr;
163 }
164
165 if (ipl->kernel) {
166 kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
167 &pentry, NULL,
168 NULL, NULL, 1, EM_S390, 0, 0);
169 if (kernel_size < 0) {
170 kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
171 if (kernel_size < 0) {
172 error_setg(errp, "could not load kernel '%s'", ipl->kernel);
173 return;
174 }
175 /* if this is Linux use KERN_IMAGE_START */
176 magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
177 if (magic && !memcmp(magic, "S390EP", 6)) {
178 pentry = KERN_IMAGE_START;
179 } else {
180 /* if not Linux load the address of the (short) IPL PSW */
181 ipl_psw = rom_ptr(4, 4);
182 if (ipl_psw) {
183 pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR;
184 } else {
185 error_setg(errp, "Could not get IPL PSW");
186 return;
187 }
188 }
189 }
190 /*
191 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
192 * kernel parameters here as well. Note: For old kernels (up to 3.2)
193 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
194 * loader) and it won't work. For this case we force it to 0x10000, too.
195 */
196 if (pentry == KERN_IMAGE_START || pentry == 0x800) {
197 char *parm_area = rom_ptr(KERN_PARM_AREA, strlen(ipl->cmdline) + 1);
198 ipl->start_addr = KERN_IMAGE_START;
199 /* Overwrite parameters in the kernel image, which are "rom" */
200 if (parm_area) {
201 strcpy(parm_area, ipl->cmdline);
202 }
203 } else {
204 ipl->start_addr = pentry;
205 }
206
207 if (ipl->initrd) {
208 ram_addr_t initrd_offset;
209 int initrd_size;
210 uint64_t *romptr;
211
212 initrd_offset = INITRD_START;
213 while (kernel_size + 0x100000 > initrd_offset) {
214 initrd_offset += 0x100000;
215 }
216 initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
217 ram_size - initrd_offset);
218 if (initrd_size == -1) {
219 error_setg(errp, "could not load initrd '%s'", ipl->initrd);
220 return;
221 }
222
223 /*
224 * we have to overwrite values in the kernel image,
225 * which are "rom"
226 */
227 romptr = rom_ptr(INITRD_PARM_START, 16);
228 if (romptr) {
229 stq_p(romptr, initrd_offset);
230 stq_p(romptr + 1, initrd_size);
231 }
232 }
233 }
234 /*
235 * Don't ever use the migrated values, they could come from a different
236 * BIOS and therefore don't work. But still migrate the values, so
237 * QEMUs relying on it don't break.
238 */
239 ipl->compat_start_addr = ipl->start_addr;
240 ipl->compat_bios_start_addr = ipl->bios_start_addr;
241 /*
242 * Because this Device is not on any bus in the qbus tree (it is
243 * not a sysbus device and it's not on some other bus like a PCI
244 * bus) it will not be automatically reset by the 'reset the
245 * sysbus' hook registered by vl.c like most devices. So we must
246 * manually register a reset hook for it.
247 * TODO: there should be a better way to do this.
248 */
249 qemu_register_reset(resettable_cold_reset_fn, dev);
250 }
251
252 static Property s390_ipl_properties[] = {
253 DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
254 DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
255 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
256 DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
257 DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
258 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
259 DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
260 true),
261 DEFINE_PROP_END_OF_LIST(),
262 };
263
264 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
265 {
266 QemuOptsList *plist = qemu_find_opts("boot-opts");
267 QemuOpts *opts = QTAILQ_FIRST(&plist->head);
268 const char *tmp;
269 unsigned long splash_time = 0;
270
271 if (!get_boot_device(0)) {
272 if (boot_menu) {
273 error_report("boot menu requires a bootindex to be specified for "
274 "the IPL device");
275 }
276 return;
277 }
278
279 switch (ipl->iplb.pbt) {
280 case S390_IPL_TYPE_CCW:
281 /* In the absence of -boot menu, use zipl parameters */
282 if (!qemu_opt_get(opts, "menu")) {
283 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
284 return;
285 }
286 break;
287 case S390_IPL_TYPE_QEMU_SCSI:
288 break;
289 default:
290 if (boot_menu) {
291 error_report("boot menu is not supported for this device type");
292 }
293 return;
294 }
295
296 if (!boot_menu) {
297 return;
298 }
299
300 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
301
302 tmp = qemu_opt_get(opts, "splash-time");
303
304 if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
305 error_report("splash-time is invalid, forcing it to 0");
306 ipl->qipl.boot_menu_timeout = 0;
307 return;
308 }
309
310 if (splash_time > 0xffffffff) {
311 error_report("splash-time is too large, forcing it to max value");
312 ipl->qipl.boot_menu_timeout = 0xffffffff;
313 return;
314 }
315
316 ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
317 }
318
319 #define CCW_DEVTYPE_NONE 0x00
320 #define CCW_DEVTYPE_VIRTIO 0x01
321 #define CCW_DEVTYPE_VIRTIO_NET 0x02
322 #define CCW_DEVTYPE_SCSI 0x03
323 #define CCW_DEVTYPE_VFIO 0x04
324
325 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
326 {
327 CcwDevice *ccw_dev = NULL;
328 int tmp_dt = CCW_DEVTYPE_NONE;
329
330 if (dev_st) {
331 VirtIONet *virtio_net_dev = (VirtIONet *)
332 object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
333 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
334 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
335 TYPE_VIRTIO_CCW_DEVICE);
336 VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
337 object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
338
339 if (virtio_ccw_dev) {
340 ccw_dev = CCW_DEVICE(virtio_ccw_dev);
341 if (virtio_net_dev) {
342 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
343 } else {
344 tmp_dt = CCW_DEVTYPE_VIRTIO;
345 }
346 } else if (vfio_ccw_dev) {
347 ccw_dev = CCW_DEVICE(vfio_ccw_dev);
348 tmp_dt = CCW_DEVTYPE_VFIO;
349 } else {
350 SCSIDevice *sd = (SCSIDevice *)
351 object_dynamic_cast(OBJECT(dev_st),
352 TYPE_SCSI_DEVICE);
353 if (sd) {
354 SCSIBus *bus = scsi_bus_from_device(sd);
355 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
356 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw,
357 vdev);
358
359 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
360 TYPE_CCW_DEVICE);
361 tmp_dt = CCW_DEVTYPE_SCSI;
362 }
363 }
364 }
365 if (devtype) {
366 *devtype = tmp_dt;
367 }
368 return ccw_dev;
369 }
370
371 static bool s390_gen_initial_iplb(S390IPLState *ipl)
372 {
373 DeviceState *dev_st;
374 CcwDevice *ccw_dev = NULL;
375 SCSIDevice *sd;
376 int devtype;
377
378 dev_st = get_boot_device(0);
379 if (dev_st) {
380 ccw_dev = s390_get_ccw_device(dev_st, &devtype);
381 }
382
383 /*
384 * Currently allow IPL only from CCW devices.
385 */
386 if (ccw_dev) {
387 switch (devtype) {
388 case CCW_DEVTYPE_SCSI:
389 sd = SCSI_DEVICE(dev_st);
390 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
391 ipl->iplb.blk0_len =
392 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
393 ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
394 ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
395 ipl->iplb.scsi.target = cpu_to_be16(sd->id);
396 ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
397 ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
398 ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
399 break;
400 case CCW_DEVTYPE_VFIO:
401 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
402 ipl->iplb.pbt = S390_IPL_TYPE_CCW;
403 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
404 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
405 break;
406 case CCW_DEVTYPE_VIRTIO_NET:
407 ipl->netboot = true;
408 /* Fall through to CCW_DEVTYPE_VIRTIO case */
409 case CCW_DEVTYPE_VIRTIO:
410 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
411 ipl->iplb.blk0_len =
412 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
413 ipl->iplb.pbt = S390_IPL_TYPE_CCW;
414 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
415 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
416 break;
417 }
418
419 if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
420 ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
421 }
422
423 return true;
424 }
425
426 return false;
427 }
428
429 int s390_ipl_set_loadparm(uint8_t *loadparm)
430 {
431 MachineState *machine = MACHINE(qdev_get_machine());
432 char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
433
434 if (lp) {
435 int i;
436
437 /* lp is an uppercase string without leading/embedded spaces */
438 for (i = 0; i < 8 && lp[i]; i++) {
439 loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
440 }
441
442 if (i < 8) {
443 memset(loadparm + i, 0x40, 8 - i); /* fill with EBCDIC spaces */
444 }
445
446 g_free(lp);
447 return 0;
448 }
449
450 return -1;
451 }
452
453 static int load_netboot_image(Error **errp)
454 {
455 S390IPLState *ipl = get_ipl_device();
456 char *netboot_filename;
457 MemoryRegion *sysmem = get_system_memory();
458 MemoryRegion *mr = NULL;
459 void *ram_ptr = NULL;
460 int img_size = -1;
461
462 mr = memory_region_find(sysmem, 0, 1).mr;
463 if (!mr) {
464 error_setg(errp, "Failed to find memory region at address 0");
465 return -1;
466 }
467
468 ram_ptr = memory_region_get_ram_ptr(mr);
469 if (!ram_ptr) {
470 error_setg(errp, "No RAM found");
471 goto unref_mr;
472 }
473
474 netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
475 if (netboot_filename == NULL) {
476 error_setg(errp, "Could not find network bootloader '%s'",
477 ipl->netboot_fw);
478 goto unref_mr;
479 }
480
481 img_size = load_elf_ram(netboot_filename, NULL, NULL, NULL,
482 &ipl->start_addr,
483 NULL, NULL, NULL, 1, EM_S390, 0, 0, NULL,
484 false);
485
486 if (img_size < 0) {
487 img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
488 ipl->start_addr = KERN_IMAGE_START;
489 }
490
491 if (img_size < 0) {
492 error_setg(errp, "Failed to load network bootloader");
493 }
494
495 g_free(netboot_filename);
496
497 unref_mr:
498 memory_region_unref(mr);
499 return img_size;
500 }
501
502 static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb,
503 int virtio_id)
504 {
505 uint8_t cssid;
506 uint8_t ssid;
507 uint16_t devno;
508 uint16_t schid;
509 SubchDev *sch = NULL;
510
511 if (iplb->pbt != S390_IPL_TYPE_CCW) {
512 return false;
513 }
514
515 devno = be16_to_cpu(iplb->ccw.devno);
516 ssid = iplb->ccw.ssid & 3;
517
518 for (schid = 0; schid < MAX_SCHID; schid++) {
519 for (cssid = 0; cssid < MAX_CSSID; cssid++) {
520 sch = css_find_subch(1, cssid, ssid, schid);
521
522 if (sch && sch->devno == devno) {
523 return sch->id.cu_model == virtio_id;
524 }
525 }
526 }
527 return false;
528 }
529
530 static bool is_virtio_net_device(IplParameterBlock *iplb)
531 {
532 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_NET);
533 }
534
535 static bool is_virtio_scsi_device(IplParameterBlock *iplb)
536 {
537 return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI);
538 }
539
540 static void update_machine_ipl_properties(IplParameterBlock *iplb)
541 {
542 Object *machine = qdev_get_machine();
543 Error *err = NULL;
544
545 /* Sync loadparm */
546 if (iplb->flags & DIAG308_FLAGS_LP_VALID) {
547 uint8_t *ebcdic_loadparm = iplb->loadparm;
548 char ascii_loadparm[9];
549 int i;
550
551 for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) {
552 ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]];
553 }
554 ascii_loadparm[i] = 0;
555 object_property_set_str(machine, "loadparm", ascii_loadparm, &err);
556 } else {
557 object_property_set_str(machine, "loadparm", "", &err);
558 }
559 if (err) {
560 warn_report_err(err);
561 }
562 }
563
564 void s390_ipl_update_diag308(IplParameterBlock *iplb)
565 {
566 S390IPLState *ipl = get_ipl_device();
567
568 /*
569 * The IPLB set and retrieved by subcodes 8/9 is completely
570 * separate from the one managed via subcodes 5/6.
571 */
572 if (iplb->pbt == S390_IPL_TYPE_PV) {
573 ipl->iplb_pv = *iplb;
574 ipl->iplb_valid_pv = true;
575 } else {
576 ipl->iplb = *iplb;
577 ipl->iplb_valid = true;
578 }
579 ipl->netboot = is_virtio_net_device(iplb);
580 update_machine_ipl_properties(iplb);
581 }
582
583 IplParameterBlock *s390_ipl_get_iplb_pv(void)
584 {
585 S390IPLState *ipl = get_ipl_device();
586
587 if (!ipl->iplb_valid_pv) {
588 return NULL;
589 }
590 return &ipl->iplb_pv;
591 }
592
593 IplParameterBlock *s390_ipl_get_iplb(void)
594 {
595 S390IPLState *ipl = get_ipl_device();
596
597 if (!ipl->iplb_valid) {
598 return NULL;
599 }
600 return &ipl->iplb;
601 }
602
603 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
604 {
605 S390IPLState *ipl = get_ipl_device();
606
607 if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
608 /* use CPU 0 for full resets */
609 ipl->reset_cpu_index = 0;
610 } else {
611 ipl->reset_cpu_index = cs->cpu_index;
612 }
613 ipl->reset_type = reset_type;
614
615 if (reset_type == S390_RESET_REIPL &&
616 ipl->iplb_valid &&
617 !ipl->netboot &&
618 ipl->iplb.pbt == S390_IPL_TYPE_CCW &&
619 is_virtio_scsi_device(&ipl->iplb)) {
620 CcwDevice *ccw_dev = s390_get_ccw_device(get_boot_device(0), NULL);
621
622 if (ccw_dev &&
623 cpu_to_be16(ccw_dev->sch->devno) == ipl->iplb.ccw.devno &&
624 (ccw_dev->sch->ssid & 3) == ipl->iplb.ccw.ssid) {
625 /*
626 * this is the original boot device's SCSI
627 * so restore IPL parameter info from it
628 */
629 ipl->iplb_valid = s390_gen_initial_iplb(ipl);
630 }
631 }
632 if (reset_type == S390_RESET_MODIFIED_CLEAR ||
633 reset_type == S390_RESET_LOAD_NORMAL ||
634 reset_type == S390_RESET_PV) {
635 /* ignore -no-reboot, send no event */
636 qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
637 } else {
638 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
639 }
640 /* as this is triggered by a CPU, make sure to exit the loop */
641 if (tcg_enabled()) {
642 cpu_loop_exit(cs);
643 }
644 }
645
646 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
647 {
648 S390IPLState *ipl = get_ipl_device();
649
650 *cs = qemu_get_cpu(ipl->reset_cpu_index);
651 if (!*cs) {
652 /* use any CPU */
653 *cs = first_cpu;
654 }
655 *reset_type = ipl->reset_type;
656 }
657
658 void s390_ipl_clear_reset_request(void)
659 {
660 S390IPLState *ipl = get_ipl_device();
661
662 ipl->reset_type = S390_RESET_EXTERNAL;
663 /* use CPU 0 for full resets */
664 ipl->reset_cpu_index = 0;
665 }
666
667 static void s390_ipl_prepare_qipl(S390CPU *cpu)
668 {
669 S390IPLState *ipl = get_ipl_device();
670 uint8_t *addr;
671 uint64_t len = 4096;
672
673 addr = cpu_physical_memory_map(cpu->env.psa, &len, true);
674 if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
675 error_report("Cannot set QEMU IPL parameters");
676 return;
677 }
678 memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
679 cpu_physical_memory_unmap(addr, len, 1, len);
680 }
681
682 int s390_ipl_prepare_pv_header(void)
683 {
684 IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
685 IPLBlockPV *ipib_pv = &ipib->pv;
686 void *hdr = g_malloc(ipib_pv->pv_header_len);
687 int rc;
688
689 cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr,
690 ipib_pv->pv_header_len);
691 rc = s390_pv_set_sec_parms((uintptr_t)hdr,
692 ipib_pv->pv_header_len);
693 g_free(hdr);
694 return rc;
695 }
696
697 int s390_ipl_pv_unpack(void)
698 {
699 IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
700 IPLBlockPV *ipib_pv = &ipib->pv;
701 int i, rc = 0;
702
703 for (i = 0; i < ipib_pv->num_comp; i++) {
704 rc = s390_pv_unpack(ipib_pv->components[i].addr,
705 TARGET_PAGE_ALIGN(ipib_pv->components[i].size),
706 ipib_pv->components[i].tweak_pref);
707 if (rc) {
708 break;
709 }
710 }
711 return rc;
712 }
713
714 void s390_ipl_prepare_cpu(S390CPU *cpu)
715 {
716 S390IPLState *ipl = get_ipl_device();
717 Error *err = NULL;
718
719 cpu->env.psw.addr = ipl->start_addr;
720 cpu->env.psw.mask = IPL_PSW_MASK;
721
722 if (!ipl->kernel || ipl->iplb_valid) {
723 cpu->env.psw.addr = ipl->bios_start_addr;
724 if (!ipl->iplb_valid) {
725 ipl->iplb_valid = s390_gen_initial_iplb(ipl);
726 }
727 }
728 if (ipl->netboot) {
729 if (load_netboot_image(&err) < 0) {
730 error_report_err(err);
731 exit(1);
732 }
733 ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
734 }
735 s390_ipl_set_boot_menu(ipl);
736 s390_ipl_prepare_qipl(cpu);
737 }
738
739 static void s390_ipl_reset(DeviceState *dev)
740 {
741 S390IPLState *ipl = S390_IPL(dev);
742
743 if (ipl->reset_type != S390_RESET_REIPL) {
744 ipl->iplb_valid = false;
745 memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
746 }
747 }
748
749 static void s390_ipl_class_init(ObjectClass *klass, void *data)
750 {
751 DeviceClass *dc = DEVICE_CLASS(klass);
752
753 dc->realize = s390_ipl_realize;
754 device_class_set_props(dc, s390_ipl_properties);
755 dc->reset = s390_ipl_reset;
756 dc->vmsd = &vmstate_ipl;
757 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
758 /* Reason: Loads the ROMs and thus can only be used one time - internally */
759 dc->user_creatable = false;
760 }
761
762 static const TypeInfo s390_ipl_info = {
763 .class_init = s390_ipl_class_init,
764 .parent = TYPE_DEVICE,
765 .name = TYPE_S390_IPL,
766 .instance_size = sizeof(S390IPLState),
767 };
768
769 static void s390_ipl_register_types(void)
770 {
771 type_register_static(&s390_ipl_info);
772 }
773
774 type_init(s390_ipl_register_types)