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/datadir.h"
17 #include "qapi/error.h"
18 #include "system/reset.h"
19 #include "system/runstate.h"
20 #include "system/tcg.h"
21 #include "elf.h"
22 #include "hw/loader.h"
23 #include "hw/qdev-properties.h"
24 #include "hw/boards.h"
25 #include "hw/s390x/virtio-ccw.h"
26 #include "hw/s390x/vfio-ccw.h"
27 #include "hw/s390x/css.h"
28 #include "hw/s390x/ebcdic.h"
29 #include "target/s390x/kvm/pv.h"
30 #include "hw/scsi/scsi.h"
31 #include "hw/virtio/virtio-net.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 "qemu/ctype.h"
38 #include "standard-headers/linux/virtio_ids.h"
39
40 #define KERN_IMAGE_START 0x010000UL
41 #define LINUX_MAGIC_ADDR 0x010008UL
42 #define KERN_PARM_AREA_SIZE_ADDR 0x010430UL
43 #define KERN_PARM_AREA 0x010480UL
44 #define LEGACY_KERN_PARM_AREA_SIZE 0x000380UL
45 #define INITRD_START 0x800000UL
46 #define INITRD_PARM_START 0x010408UL
47 #define PARMFILE_START 0x001000UL
48 #define ZIPL_IMAGE_START 0x009000UL
49 #define BIOS_MAX_SIZE 0x300000UL
50 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
51
52 /* Place the IPLB chain immediately before the BIOS in memory */
find_iplb_chain_addr(uint64_t bios_addr,uint16_t count)53 static uint64_t find_iplb_chain_addr(uint64_t bios_addr, uint16_t count)
54 {
55 return (bios_addr & TARGET_PAGE_MASK)
56 - (count * sizeof(IplParameterBlock));
57 }
58
59 static const VMStateDescription vmstate_iplb_extended = {
60 .name = "ipl/iplb_extended",
61 .version_id = 0,
62 .minimum_version_id = 0,
63 .fields = (const VMStateField[]) {
64 VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
65 VMSTATE_END_OF_LIST()
66 }
67 };
68
69 static const VMStateDescription vmstate_iplb = {
70 .name = "ipl/iplb",
71 .version_id = 0,
72 .minimum_version_id = 0,
73 .fields = (const VMStateField[]) {
74 VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
75 VMSTATE_UINT16(devno, IplParameterBlock),
76 VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
77 VMSTATE_END_OF_LIST()
78 },
79 .subsections = (const VMStateDescription * const []) {
80 &vmstate_iplb_extended,
81 NULL
82 }
83 };
84
85 static const VMStateDescription vmstate_ipl = {
86 .name = "ipl",
87 .version_id = 0,
88 .minimum_version_id = 0,
89 .fields = (const VMStateField[]) {
90 VMSTATE_UINT64(compat_start_addr, S390IPLState),
91 VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
92 VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
93 VMSTATE_BOOL(iplb_valid, S390IPLState),
94 VMSTATE_UINT8(cssid, S390IPLState),
95 VMSTATE_UINT8(ssid, S390IPLState),
96 VMSTATE_UINT16(devno, S390IPLState),
97 VMSTATE_END_OF_LIST()
98 }
99 };
100
get_ipl_device(void)101 static S390IPLState *get_ipl_device(void)
102 {
103 return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
104 }
105
bios_translate_addr(void * opaque,uint64_t srcaddr)106 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
107 {
108 uint64_t dstaddr = *(uint64_t *) opaque;
109 /*
110 * Assuming that our s390-ccw.img was linked for starting at address 0,
111 * we can simply add the destination address for the final location
112 */
113 return srcaddr + dstaddr;
114 }
115
get_max_kernel_cmdline_size(void)116 static uint64_t get_max_kernel_cmdline_size(void)
117 {
118 uint64_t *size_ptr = rom_ptr(KERN_PARM_AREA_SIZE_ADDR, sizeof(*size_ptr));
119
120 if (size_ptr) {
121 uint64_t size;
122
123 size = be64_to_cpu(*size_ptr);
124 if (size) {
125 return size;
126 }
127 }
128 return LEGACY_KERN_PARM_AREA_SIZE;
129 }
130
s390_ipl_realize(DeviceState * dev,Error ** errp)131 static void s390_ipl_realize(DeviceState *dev, Error **errp)
132 {
133 MachineState *ms = MACHINE(qdev_get_machine());
134 S390IPLState *ipl = S390_IPL(dev);
135 uint32_t *ipl_psw;
136 uint64_t pentry;
137 char *magic;
138 int kernel_size;
139
140 int bios_size;
141 char *bios_filename;
142
143 /*
144 * Always load the bios if it was enforced,
145 * even if an external kernel has been defined.
146 */
147 if (!ipl->kernel || ipl->enforce_bios) {
148 uint64_t fwbase;
149
150 if (ms->ram_size < BIOS_MAX_SIZE) {
151 error_setg(errp, "not enough RAM to load the BIOS file");
152 return;
153 }
154
155 fwbase = (MIN(ms->ram_size, 0x80000000U) - BIOS_MAX_SIZE) & ~0xffffUL;
156
157 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware);
158 if (bios_filename == NULL) {
159 error_setg(errp, "could not find stage1 bootloader");
160 return;
161 }
162
163 bios_size = load_elf(bios_filename, NULL,
164 bios_translate_addr, &fwbase,
165 &ipl->bios_start_addr, NULL, NULL, NULL,
166 ELFDATA2MSB, EM_S390, 0, 0);
167 if (bios_size > 0) {
168 /* Adjust ELF start address to final location */
169 ipl->bios_start_addr += fwbase;
170 } else {
171 /* Try to load non-ELF file */
172 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
173 4096);
174 ipl->bios_start_addr = ZIPL_IMAGE_START;
175 }
176 g_free(bios_filename);
177
178 if (bios_size == -1) {
179 error_setg(errp, "could not load bootloader '%s'", ipl->firmware);
180 return;
181 }
182
183 /* default boot target is the bios */
184 ipl->start_addr = ipl->bios_start_addr;
185 }
186
187 if (ipl->kernel) {
188 kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
189 &pentry, NULL,
190 NULL, NULL, ELFDATA2MSB, EM_S390, 0, 0);
191 if (kernel_size < 0) {
192 kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size);
193 if (kernel_size < 0) {
194 error_setg(errp, "could not load kernel '%s'", ipl->kernel);
195 return;
196 }
197 /* if this is Linux use KERN_IMAGE_START */
198 magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
199 if (magic && !memcmp(magic, "S390EP", 6)) {
200 pentry = KERN_IMAGE_START;
201 } else {
202 /* if not Linux load the address of the (short) IPL PSW */
203 ipl_psw = rom_ptr(4, 4);
204 if (ipl_psw) {
205 pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR;
206 } else {
207 error_setg(errp, "Could not get IPL PSW");
208 return;
209 }
210 }
211 }
212 /*
213 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
214 * kernel parameters here as well. Note: For old kernels (up to 3.2)
215 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
216 * loader) and it won't work. For this case we force it to 0x10000, too.
217 */
218 if (pentry == KERN_IMAGE_START || pentry == 0x800) {
219 size_t cmdline_size = strlen(ipl->cmdline) + 1;
220 char *parm_area = rom_ptr(KERN_PARM_AREA, cmdline_size);
221
222 ipl->start_addr = KERN_IMAGE_START;
223 /* Overwrite parameters in the kernel image, which are "rom" */
224 if (parm_area) {
225 uint64_t max_cmdline_size = get_max_kernel_cmdline_size();
226
227 if (cmdline_size > max_cmdline_size) {
228 error_setg(errp,
229 "kernel command line exceeds maximum size:"
230 " %zu > %" PRIu64,
231 cmdline_size, max_cmdline_size);
232 return;
233 }
234
235 strcpy(parm_area, ipl->cmdline);
236 }
237 } else {
238 ipl->start_addr = pentry;
239 }
240
241 if (ipl->initrd) {
242 ram_addr_t initrd_offset;
243 int initrd_size;
244 uint64_t *romptr;
245
246 initrd_offset = INITRD_START;
247 while (kernel_size + 0x100000 > initrd_offset) {
248 initrd_offset += 0x100000;
249 }
250 initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
251 ms->ram_size - initrd_offset);
252 if (initrd_size == -1) {
253 error_setg(errp, "could not load initrd '%s'", ipl->initrd);
254 return;
255 }
256
257 /*
258 * we have to overwrite values in the kernel image,
259 * which are "rom"
260 */
261 romptr = rom_ptr(INITRD_PARM_START, 16);
262 if (romptr) {
263 stq_be_p(romptr, initrd_offset);
264 stq_be_p(romptr + 1, initrd_size);
265 }
266 }
267 }
268 /*
269 * Don't ever use the migrated values, they could come from a different
270 * BIOS and therefore don't work. But still migrate the values, so
271 * QEMUs relying on it don't break.
272 */
273 ipl->compat_start_addr = ipl->start_addr;
274 ipl->compat_bios_start_addr = ipl->bios_start_addr;
275 /*
276 * Because this Device is not on any bus in the qbus tree (it is
277 * not a sysbus device and it's not on some other bus like a PCI
278 * bus) it will not be automatically reset by the 'reset the
279 * sysbus' hook registered by vl.c like most devices. So we must
280 * manually register a reset hook for it.
281 * TODO: there should be a better way to do this.
282 */
283 qemu_register_reset(resettable_cold_reset_fn, dev);
284 }
285
286 static const Property s390_ipl_properties[] = {
287 DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
288 DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
289 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
290 DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
291 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
292 };
293
s390_ipl_set_boot_menu(S390IPLState * ipl)294 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
295 {
296 unsigned long splash_time = 0;
297
298 if (!get_boot_device(0)) {
299 if (current_machine->boot_config.has_menu && current_machine->boot_config.menu) {
300 error_report("boot menu requires a bootindex to be specified for "
301 "the IPL device");
302 }
303 return;
304 }
305
306 switch (ipl->iplb.pbt) {
307 case S390_IPL_TYPE_CCW:
308 /* In the absence of -boot menu, use zipl parameters */
309 if (!current_machine->boot_config.has_menu) {
310 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
311 return;
312 }
313 break;
314 case S390_IPL_TYPE_QEMU_SCSI:
315 break;
316 default:
317 if (current_machine->boot_config.has_menu && current_machine->boot_config.menu) {
318 error_report("boot menu is not supported for this device type");
319 }
320 return;
321 }
322
323 if (!current_machine->boot_config.has_menu || !current_machine->boot_config.menu) {
324 return;
325 }
326
327 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
328
329 if (current_machine->boot_config.has_splash_time) {
330 splash_time = current_machine->boot_config.splash_time;
331 }
332 if (splash_time > 0xffffffff) {
333 error_report("splash-time is too large, forcing it to max value");
334 ipl->qipl.boot_menu_timeout = 0xffffffff;
335 return;
336 }
337
338 ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
339 }
340
341 #define CCW_DEVTYPE_NONE 0x00
342 #define CCW_DEVTYPE_VIRTIO 0x01
343 #define CCW_DEVTYPE_VIRTIO_NET 0x02
344 #define CCW_DEVTYPE_SCSI 0x03
345 #define CCW_DEVTYPE_VFIO 0x04
346
s390_get_ccw_device(DeviceState * dev_st,int * devtype)347 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
348 {
349 CcwDevice *ccw_dev = NULL;
350 int tmp_dt = CCW_DEVTYPE_NONE;
351
352 if (dev_st) {
353 VirtIONet *virtio_net_dev = (VirtIONet *)
354 object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
355 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
356 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
357 TYPE_VIRTIO_CCW_DEVICE);
358 VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
359 object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
360
361 if (virtio_ccw_dev) {
362 ccw_dev = CCW_DEVICE(virtio_ccw_dev);
363 if (virtio_net_dev) {
364 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
365 } else {
366 tmp_dt = CCW_DEVTYPE_VIRTIO;
367 }
368 } else if (vfio_ccw_dev) {
369 ccw_dev = CCW_DEVICE(vfio_ccw_dev);
370 tmp_dt = CCW_DEVTYPE_VFIO;
371 } else {
372 SCSIDevice *sd = (SCSIDevice *)
373 object_dynamic_cast(OBJECT(dev_st),
374 TYPE_SCSI_DEVICE);
375 if (sd) {
376 SCSIBus *sbus = scsi_bus_from_device(sd);
377 VirtIODevice *vdev = (VirtIODevice *)
378 object_dynamic_cast(OBJECT(sbus->qbus.parent),
379 TYPE_VIRTIO_DEVICE);
380 if (vdev) {
381 ccw_dev = (CcwDevice *)
382 object_dynamic_cast(OBJECT(qdev_get_parent_bus(DEVICE(vdev))->parent),
383 TYPE_CCW_DEVICE);
384 if (ccw_dev) {
385 tmp_dt = CCW_DEVTYPE_SCSI;
386 }
387 }
388 }
389 }
390 }
391 if (devtype) {
392 *devtype = tmp_dt;
393 }
394 return ccw_dev;
395 }
396
s390_ipl_map_iplb_chain(IplParameterBlock * iplb_chain)397 static uint64_t s390_ipl_map_iplb_chain(IplParameterBlock *iplb_chain)
398 {
399 S390IPLState *ipl = get_ipl_device();
400 uint16_t count = be16_to_cpu(ipl->qipl.chain_len);
401 uint64_t len = sizeof(IplParameterBlock) * count;
402 uint64_t chain_addr = find_iplb_chain_addr(ipl->bios_start_addr, count);
403
404 cpu_physical_memory_write(chain_addr, iplb_chain, len);
405 return chain_addr;
406 }
407
s390_ipl_fmt_loadparm(uint8_t * loadparm,char * str,Error ** errp)408 void s390_ipl_fmt_loadparm(uint8_t *loadparm, char *str, Error **errp)
409 {
410 /* Initialize the loadparm with spaces */
411 memset(loadparm, ' ', LOADPARM_LEN);
412 qdev_prop_sanitize_s390x_loadparm(loadparm, str, errp);
413 }
414
s390_ipl_convert_loadparm(char * ascii_lp,uint8_t * ebcdic_lp)415 void s390_ipl_convert_loadparm(char *ascii_lp, uint8_t *ebcdic_lp)
416 {
417 int i;
418
419 /* Initialize the loadparm with EBCDIC spaces (0x40) */
420 memset(ebcdic_lp, '@', LOADPARM_LEN);
421 for (i = 0; i < LOADPARM_LEN && ascii_lp[i]; i++) {
422 ebcdic_lp[i] = ascii2ebcdic[(uint8_t) ascii_lp[i]];
423 }
424 }
425
s390_build_iplb(DeviceState * dev_st,IplParameterBlock * iplb)426 static bool s390_build_iplb(DeviceState *dev_st, IplParameterBlock *iplb)
427 {
428 CcwDevice *ccw_dev = NULL;
429 SCSIDevice *sd;
430 int devtype;
431 uint8_t *lp;
432 g_autofree void *scsi_lp = NULL;
433
434 /*
435 * Currently allow IPL only from CCW devices.
436 */
437 ccw_dev = s390_get_ccw_device(dev_st, &devtype);
438 if (ccw_dev) {
439 lp = ccw_dev->loadparm;
440
441 switch (devtype) {
442 case CCW_DEVTYPE_SCSI:
443 sd = SCSI_DEVICE(dev_st);
444 scsi_lp = object_property_get_str(OBJECT(sd), "loadparm", NULL);
445 if (scsi_lp && strlen(scsi_lp) > 0) {
446 lp = scsi_lp;
447 }
448 iplb->len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
449 iplb->blk0_len =
450 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
451 iplb->pbt = S390_IPL_TYPE_QEMU_SCSI;
452 iplb->scsi.lun = cpu_to_be32(sd->lun);
453 iplb->scsi.target = cpu_to_be16(sd->id);
454 iplb->scsi.channel = cpu_to_be16(sd->channel);
455 iplb->scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
456 iplb->scsi.ssid = ccw_dev->sch->ssid & 3;
457 break;
458 case CCW_DEVTYPE_VFIO:
459 iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
460 iplb->pbt = S390_IPL_TYPE_CCW;
461 iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
462 iplb->ccw.ssid = ccw_dev->sch->ssid & 3;
463 break;
464 case CCW_DEVTYPE_VIRTIO_NET:
465 case CCW_DEVTYPE_VIRTIO:
466 iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
467 iplb->blk0_len =
468 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
469 iplb->pbt = S390_IPL_TYPE_CCW;
470 iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
471 iplb->ccw.ssid = ccw_dev->sch->ssid & 3;
472 break;
473 }
474
475 /* If the device loadparm is empty use the global machine loadparm */
476 if (memcmp(lp, NO_LOADPARM, 8) == 0) {
477 lp = S390_CCW_MACHINE(qdev_get_machine())->loadparm;
478 }
479
480 s390_ipl_convert_loadparm((char *)lp, iplb->loadparm);
481 iplb->flags |= DIAG308_FLAGS_LP_VALID;
482
483 return true;
484 }
485
486 return false;
487 }
488
s390_rebuild_iplb(uint16_t dev_index,IplParameterBlock * iplb)489 void s390_rebuild_iplb(uint16_t dev_index, IplParameterBlock *iplb)
490 {
491 S390IPLState *ipl = get_ipl_device();
492 uint16_t index;
493 index = ipl->rebuilt_iplb ? ipl->iplb_index : dev_index;
494
495 ipl->rebuilt_iplb = s390_build_iplb(get_boot_device(index), iplb);
496 ipl->iplb_index = index;
497 }
498
s390_init_all_iplbs(S390IPLState * ipl)499 static bool s390_init_all_iplbs(S390IPLState *ipl)
500 {
501 int iplb_num = 0;
502 IplParameterBlock iplb_chain[7];
503 DeviceState *dev_st = get_boot_device(0);
504 Object *machine = qdev_get_machine();
505
506 /*
507 * Parse the boot devices. Generate an IPLB for only the first boot device
508 * which will later be set with DIAG308.
509 */
510 if (!dev_st) {
511 ipl->qipl.chain_len = 0;
512 return false;
513 }
514
515 /* If no machine loadparm was defined fill it with spaces */
516 if (memcmp(S390_CCW_MACHINE(machine)->loadparm, NO_LOADPARM, 8) == 0) {
517 object_property_set_str(machine, "loadparm", " ", NULL);
518 }
519
520 iplb_num = 1;
521 s390_build_iplb(dev_st, &ipl->iplb);
522
523 /* Index any fallback boot devices */
524 while (get_boot_device(iplb_num)) {
525 iplb_num++;
526 }
527
528 if (iplb_num > MAX_BOOT_DEVS) {
529 warn_report("Excess boot devices defined! %d boot devices found, "
530 "but only the first %d will be considered.",
531 iplb_num, MAX_BOOT_DEVS);
532
533 iplb_num = MAX_BOOT_DEVS;
534 }
535
536 ipl->qipl.chain_len = cpu_to_be16(iplb_num - 1);
537
538 /*
539 * Build fallback IPLBs for any boot devices above index 0, up to a
540 * maximum amount as defined in ipl.h
541 */
542 if (iplb_num > 1) {
543 /* Start at 1 because the IPLB for boot index 0 is not chained */
544 for (int i = 1; i < iplb_num; i++) {
545 dev_st = get_boot_device(i);
546 s390_build_iplb(dev_st, &iplb_chain[i - 1]);
547 }
548
549 ipl->qipl.next_iplb = cpu_to_be64(s390_ipl_map_iplb_chain(iplb_chain));
550 }
551
552 return iplb_num;
553 }
554
update_machine_ipl_properties(IplParameterBlock * iplb)555 static void update_machine_ipl_properties(IplParameterBlock *iplb)
556 {
557 Object *machine = qdev_get_machine();
558 Error *err = NULL;
559
560 /* Sync loadparm */
561 if (iplb->flags & DIAG308_FLAGS_LP_VALID) {
562 uint8_t *ebcdic_loadparm = iplb->loadparm;
563 char ascii_loadparm[9];
564 int i;
565
566 for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) {
567 ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]];
568 }
569 ascii_loadparm[i] = 0;
570 object_property_set_str(machine, "loadparm", ascii_loadparm, &err);
571 } else {
572 object_property_set_str(machine, "loadparm", " ", &err);
573 }
574 if (err) {
575 warn_report_err(err);
576 }
577 }
578
s390_ipl_update_diag308(IplParameterBlock * iplb)579 void s390_ipl_update_diag308(IplParameterBlock *iplb)
580 {
581 S390IPLState *ipl = get_ipl_device();
582
583 /*
584 * The IPLB set and retrieved by subcodes 8/9 is completely
585 * separate from the one managed via subcodes 5/6.
586 */
587 if (iplb->pbt == S390_IPL_TYPE_PV) {
588 ipl->iplb_pv = *iplb;
589 ipl->iplb_valid_pv = true;
590 } else {
591 ipl->iplb = *iplb;
592 ipl->iplb_valid = true;
593 }
594
595 update_machine_ipl_properties(iplb);
596 }
597
s390_ipl_get_iplb_pv(void)598 IplParameterBlock *s390_ipl_get_iplb_pv(void)
599 {
600 S390IPLState *ipl = get_ipl_device();
601
602 if (!ipl->iplb_valid_pv) {
603 return NULL;
604 }
605 return &ipl->iplb_pv;
606 }
607
s390_ipl_get_iplb(void)608 IplParameterBlock *s390_ipl_get_iplb(void)
609 {
610 S390IPLState *ipl = get_ipl_device();
611
612 if (!ipl->iplb_valid) {
613 return NULL;
614 }
615 return &ipl->iplb;
616 }
617
s390_ipl_reset_request(CPUState * cs,enum s390_reset reset_type)618 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
619 {
620 S390IPLState *ipl = get_ipl_device();
621 if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
622 /* use CPU 0 for full resets */
623 ipl->reset_cpu_index = 0;
624 } else {
625 ipl->reset_cpu_index = cs->cpu_index;
626 }
627
628 ipl->reset_type = reset_type;
629 if (reset_type == S390_RESET_MODIFIED_CLEAR ||
630 reset_type == S390_RESET_LOAD_NORMAL ||
631 reset_type == S390_RESET_PV) {
632 /* ignore -no-reboot, send no event */
633 qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
634 } else {
635 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
636 }
637 /* as this is triggered by a CPU, make sure to exit the loop */
638 if (tcg_enabled()) {
639 cpu_loop_exit(cs);
640 }
641 }
642
s390_ipl_get_reset_request(CPUState ** cs,enum s390_reset * reset_type)643 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
644 {
645 S390IPLState *ipl = get_ipl_device();
646
647 *cs = qemu_get_cpu(ipl->reset_cpu_index);
648 if (!*cs) {
649 /* use any CPU */
650 *cs = first_cpu;
651 }
652 *reset_type = ipl->reset_type;
653 }
654
s390_ipl_clear_reset_request(void)655 void s390_ipl_clear_reset_request(void)
656 {
657 S390IPLState *ipl = get_ipl_device();
658
659 ipl->reset_type = S390_RESET_EXTERNAL;
660 /* use CPU 0 for full resets */
661 ipl->reset_cpu_index = 0;
662 }
663
s390_ipl_prepare_qipl(S390CPU * cpu)664 static void s390_ipl_prepare_qipl(S390CPU *cpu)
665 {
666 S390IPLState *ipl = get_ipl_device();
667 uint8_t *addr;
668 uint64_t len = 4096;
669
670 addr = cpu_physical_memory_map(cpu->env.psa, &len, true);
671 if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
672 error_report("Cannot set QEMU IPL parameters");
673 return;
674 }
675 memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
676 cpu_physical_memory_unmap(addr, len, 1, len);
677 }
678
s390_ipl_prepare_pv_header(Error ** errp)679 int s390_ipl_prepare_pv_header(Error **errp)
680 {
681 IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
682 IPLBlockPV *ipib_pv = &ipib->pv;
683 void *hdr = g_malloc(ipib_pv->pv_header_len);
684 int rc;
685
686 cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr,
687 ipib_pv->pv_header_len);
688 rc = s390_pv_set_sec_parms((uintptr_t)hdr, ipib_pv->pv_header_len, errp);
689 g_free(hdr);
690 return rc;
691 }
692
s390_ipl_pv_unpack(void)693 int s390_ipl_pv_unpack(void)
694 {
695 IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
696 IPLBlockPV *ipib_pv = &ipib->pv;
697 int i, rc = 0;
698
699 for (i = 0; i < ipib_pv->num_comp; i++) {
700 rc = s390_pv_unpack(ipib_pv->components[i].addr,
701 TARGET_PAGE_ALIGN(ipib_pv->components[i].size),
702 ipib_pv->components[i].tweak_pref);
703 if (rc) {
704 break;
705 }
706 }
707 return rc;
708 }
709
s390_ipl_prepare_cpu(S390CPU * cpu)710 void s390_ipl_prepare_cpu(S390CPU *cpu)
711 {
712 S390IPLState *ipl = get_ipl_device();
713
714 cpu->env.psw.addr = ipl->start_addr;
715 cpu->env.psw.mask = IPL_PSW_MASK;
716
717 if (!ipl->kernel || ipl->iplb_valid) {
718 cpu->env.psw.addr = ipl->bios_start_addr;
719 if (!ipl->iplb_valid) {
720 ipl->iplb_valid = s390_init_all_iplbs(ipl);
721 } else {
722 ipl->qipl.chain_len = 0;
723 }
724 }
725 s390_ipl_set_boot_menu(ipl);
726 s390_ipl_prepare_qipl(cpu);
727 }
728
s390_ipl_reset(DeviceState * dev)729 static void s390_ipl_reset(DeviceState *dev)
730 {
731 S390IPLState *ipl = S390_IPL(dev);
732
733 if (ipl->reset_type != S390_RESET_REIPL) {
734 ipl->iplb_valid = false;
735 memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
736 }
737 }
738
s390_ipl_class_init(ObjectClass * klass,void * data)739 static void s390_ipl_class_init(ObjectClass *klass, void *data)
740 {
741 DeviceClass *dc = DEVICE_CLASS(klass);
742
743 dc->realize = s390_ipl_realize;
744 device_class_set_props(dc, s390_ipl_properties);
745 device_class_set_legacy_reset(dc, s390_ipl_reset);
746 dc->vmsd = &vmstate_ipl;
747 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
748 /* Reason: Loads the ROMs and thus can only be used one time - internally */
749 dc->user_creatable = false;
750 }
751
752 static const TypeInfo s390_ipl_info = {
753 .class_init = s390_ipl_class_init,
754 .parent = TYPE_DEVICE,
755 .name = TYPE_S390_IPL,
756 .instance_size = sizeof(S390IPLState),
757 };
758
s390_ipl_register_types(void)759 static void s390_ipl_register_types(void)
760 {
761 type_register_static(&s390_ipl_info);
762 }
763
764 type_init(s390_ipl_register_types)
765