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 "hw/scsi/scsi.h"
30 #include "hw/virtio/virtio-net.h"
31 #include "ipl.h"
32 #include "qemu/error-report.h"
33 #include "qemu/config-file.h"
34 #include "qemu/cutils.h"
35 #include "qemu/option.h"
36 #include "qemu/ctype.h"
37 #include "standard-headers/linux/virtio_ids.h"
38
39 #define KERN_IMAGE_START 0x010000UL
40 #define LINUX_MAGIC_ADDR 0x010008UL
41 #define KERN_PARM_AREA_SIZE_ADDR 0x010430UL
42 #define KERN_PARM_AREA 0x010480UL
43 #define LEGACY_KERN_PARM_AREA_SIZE 0x000380UL
44 #define INITRD_START 0x800000UL
45 #define INITRD_PARM_START 0x010408UL
46 #define PARMFILE_START 0x001000UL
47 #define ZIPL_IMAGE_START 0x009000UL
48 #define BIOS_MAX_SIZE 0x300000UL
49 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
50
51 /* Place the IPLB chain immediately before the BIOS in memory */
find_iplb_chain_addr(uint64_t bios_addr,uint16_t count)52 static uint64_t find_iplb_chain_addr(uint64_t bios_addr, uint16_t count)
53 {
54 return (bios_addr & TARGET_PAGE_MASK)
55 - (count * sizeof(IplParameterBlock));
56 }
57
58 static const VMStateDescription vmstate_iplb_extended = {
59 .name = "ipl/iplb_extended",
60 .version_id = 0,
61 .minimum_version_id = 0,
62 .fields = (const VMStateField[]) {
63 VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
64 VMSTATE_END_OF_LIST()
65 }
66 };
67
68 static const VMStateDescription vmstate_iplb = {
69 .name = "ipl/iplb",
70 .version_id = 0,
71 .minimum_version_id = 0,
72 .fields = (const VMStateField[]) {
73 VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
74 VMSTATE_UINT16(devno, IplParameterBlock),
75 VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
76 VMSTATE_END_OF_LIST()
77 },
78 .subsections = (const VMStateDescription * const []) {
79 &vmstate_iplb_extended,
80 NULL
81 }
82 };
83
84 static const VMStateDescription vmstate_ipl = {
85 .name = "ipl",
86 .version_id = 0,
87 .minimum_version_id = 0,
88 .fields = (const VMStateField[]) {
89 VMSTATE_UINT64(compat_start_addr, S390IPLState),
90 VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
91 VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
92 VMSTATE_BOOL(iplb_valid, S390IPLState),
93 VMSTATE_UINT8(cssid, S390IPLState),
94 VMSTATE_UINT8(ssid, S390IPLState),
95 VMSTATE_UINT16(devno, S390IPLState),
96 VMSTATE_END_OF_LIST()
97 }
98 };
99
get_ipl_device(void)100 static S390IPLState *get_ipl_device(void)
101 {
102 return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
103 }
104
bios_translate_addr(void * opaque,uint64_t srcaddr)105 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
106 {
107 uint64_t dstaddr = *(uint64_t *) opaque;
108 /*
109 * Assuming that our s390-ccw.img was linked for starting at address 0,
110 * we can simply add the destination address for the final location
111 */
112 return srcaddr + dstaddr;
113 }
114
get_max_kernel_cmdline_size(void)115 static uint64_t get_max_kernel_cmdline_size(void)
116 {
117 uint64_t *size_ptr = rom_ptr(KERN_PARM_AREA_SIZE_ADDR, sizeof(*size_ptr));
118
119 if (size_ptr) {
120 uint64_t size;
121
122 size = be64_to_cpu(*size_ptr);
123 if (size) {
124 return size;
125 }
126 }
127 return LEGACY_KERN_PARM_AREA_SIZE;
128 }
129
s390_ipl_realize(DeviceState * dev,Error ** errp)130 static void s390_ipl_realize(DeviceState *dev, Error **errp)
131 {
132 MachineState *ms = MACHINE(qdev_get_machine());
133 S390IPLState *ipl = S390_IPL(dev);
134 uint32_t *ipl_psw;
135 uint64_t pentry;
136 char *magic;
137 int kernel_size;
138
139 int bios_size;
140 char *bios_filename;
141
142 /*
143 * Always load the bios if it was enforced,
144 * even if an external kernel has been defined.
145 */
146 if (!ipl->kernel || ipl->enforce_bios) {
147 uint64_t fwbase;
148
149 if (ms->ram_size < BIOS_MAX_SIZE) {
150 error_setg(errp, "not enough RAM to load the BIOS file");
151 return;
152 }
153
154 fwbase = (MIN(ms->ram_size, 0x80000000U) - BIOS_MAX_SIZE) & ~0xffffUL;
155
156 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->firmware);
157 if (bios_filename == NULL) {
158 error_setg(errp, "could not find stage1 bootloader");
159 return;
160 }
161
162 bios_size = load_elf(bios_filename, NULL,
163 bios_translate_addr, &fwbase,
164 &ipl->bios_start_addr, NULL, NULL, NULL,
165 ELFDATA2MSB, EM_S390, 0, 0);
166 if (bios_size > 0) {
167 /* Adjust ELF start address to final location */
168 ipl->bios_start_addr += fwbase;
169 } else {
170 /* Try to load non-ELF file */
171 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
172 4096);
173 ipl->bios_start_addr = ZIPL_IMAGE_START;
174 }
175 g_free(bios_filename);
176
177 if (bios_size == -1) {
178 error_setg(errp, "could not load bootloader '%s'", ipl->firmware);
179 return;
180 }
181
182 /* default boot target is the bios */
183 ipl->start_addr = ipl->bios_start_addr;
184 }
185
186 if (ipl->kernel) {
187 kernel_size = load_elf(ipl->kernel, NULL, NULL, NULL,
188 &pentry, NULL,
189 NULL, NULL, ELFDATA2MSB, EM_S390, 0, 0);
190 if (kernel_size < 0) {
191 kernel_size = load_image_targphys(ipl->kernel, 0, ms->ram_size);
192 if (kernel_size < 0) {
193 error_setg(errp, "could not load kernel '%s'", ipl->kernel);
194 return;
195 }
196 /* if this is Linux use KERN_IMAGE_START */
197 magic = rom_ptr(LINUX_MAGIC_ADDR, 6);
198 if (magic && !memcmp(magic, "S390EP", 6)) {
199 pentry = KERN_IMAGE_START;
200 } else {
201 /* if not Linux load the address of the (short) IPL PSW */
202 ipl_psw = rom_ptr(4, 4);
203 if (ipl_psw) {
204 pentry = be32_to_cpu(*ipl_psw) & PSW_MASK_SHORT_ADDR;
205 } else {
206 error_setg(errp, "Could not get IPL PSW");
207 return;
208 }
209 }
210 }
211 /*
212 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
213 * kernel parameters here as well. Note: For old kernels (up to 3.2)
214 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
215 * loader) and it won't work. For this case we force it to 0x10000, too.
216 */
217 if (pentry == KERN_IMAGE_START || pentry == 0x800) {
218 size_t cmdline_size = strlen(ipl->cmdline) + 1;
219 char *parm_area = rom_ptr(KERN_PARM_AREA, cmdline_size);
220
221 ipl->start_addr = KERN_IMAGE_START;
222 /* Overwrite parameters in the kernel image, which are "rom" */
223 if (parm_area) {
224 uint64_t max_cmdline_size = get_max_kernel_cmdline_size();
225
226 if (cmdline_size > max_cmdline_size) {
227 error_setg(errp,
228 "kernel command line exceeds maximum size:"
229 " %zu > %" PRIu64,
230 cmdline_size, max_cmdline_size);
231 return;
232 }
233
234 strcpy(parm_area, ipl->cmdline);
235 }
236 } else {
237 ipl->start_addr = pentry;
238 }
239
240 if (ipl->initrd) {
241 ram_addr_t initrd_offset;
242 int initrd_size;
243 uint64_t *romptr;
244
245 initrd_offset = INITRD_START;
246 while (kernel_size + 0x100000 > initrd_offset) {
247 initrd_offset += 0x100000;
248 }
249 initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
250 ms->ram_size - initrd_offset);
251 if (initrd_size == -1) {
252 error_setg(errp, "could not load initrd '%s'", ipl->initrd);
253 return;
254 }
255
256 /*
257 * we have to overwrite values in the kernel image,
258 * which are "rom"
259 */
260 romptr = rom_ptr(INITRD_PARM_START, 16);
261 if (romptr) {
262 stq_be_p(romptr, initrd_offset);
263 stq_be_p(romptr + 1, initrd_size);
264 }
265 }
266 }
267 /*
268 * Don't ever use the migrated values, they could come from a different
269 * BIOS and therefore don't work. But still migrate the values, so
270 * QEMUs relying on it don't break.
271 */
272 ipl->compat_start_addr = ipl->start_addr;
273 ipl->compat_bios_start_addr = ipl->bios_start_addr;
274 /*
275 * Because this Device is not on any bus in the qbus tree (it is
276 * not a sysbus device and it's not on some other bus like a PCI
277 * bus) it will not be automatically reset by the 'reset the
278 * sysbus' hook registered by vl.c like most devices. So we must
279 * manually register a reset hook for it.
280 * TODO: there should be a better way to do this.
281 */
282 qemu_register_reset(resettable_cold_reset_fn, dev);
283 }
284
285 static const Property s390_ipl_properties[] = {
286 DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
287 DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
288 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
289 DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
290 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
291 };
292
s390_ipl_set_boot_menu(S390IPLState * ipl)293 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
294 {
295 unsigned long splash_time = 0;
296
297 if (!get_boot_device(0)) {
298 if (current_machine->boot_config.has_menu && current_machine->boot_config.menu) {
299 error_report("boot menu requires a bootindex to be specified for "
300 "the IPL device");
301 }
302 return;
303 }
304
305 switch (ipl->iplb.pbt) {
306 case S390_IPL_TYPE_CCW:
307 /* In the absence of -boot menu, use zipl parameters */
308 if (!current_machine->boot_config.has_menu) {
309 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_ZIPL;
310 return;
311 }
312 break;
313 case S390_IPL_TYPE_QEMU_SCSI:
314 break;
315 default:
316 if (current_machine->boot_config.has_menu && current_machine->boot_config.menu) {
317 error_report("boot menu is not supported for this device type");
318 }
319 return;
320 }
321
322 if (!current_machine->boot_config.has_menu || !current_machine->boot_config.menu) {
323 return;
324 }
325
326 ipl->qipl.qipl_flags |= QIPL_FLAG_BM_OPTS_CMD;
327
328 if (current_machine->boot_config.has_splash_time) {
329 splash_time = current_machine->boot_config.splash_time;
330 }
331 if (splash_time > 0xffffffff) {
332 error_report("splash-time is too large, forcing it to max value");
333 ipl->qipl.boot_menu_timeout = 0xffffffff;
334 return;
335 }
336
337 ipl->qipl.boot_menu_timeout = cpu_to_be32(splash_time);
338 }
339
340 #define CCW_DEVTYPE_NONE 0x00
341 #define CCW_DEVTYPE_VIRTIO 0x01
342 #define CCW_DEVTYPE_VIRTIO_NET 0x02
343 #define CCW_DEVTYPE_SCSI 0x03
344 #define CCW_DEVTYPE_VFIO 0x04
345
s390_get_ccw_device(DeviceState * dev_st,int * devtype)346 static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype)
347 {
348 CcwDevice *ccw_dev = NULL;
349 int tmp_dt = CCW_DEVTYPE_NONE;
350
351 if (dev_st) {
352 VirtIONet *virtio_net_dev = (VirtIONet *)
353 object_dynamic_cast(OBJECT(dev_st), TYPE_VIRTIO_NET);
354 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
355 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
356 TYPE_VIRTIO_CCW_DEVICE);
357 VFIOCCWDevice *vfio_ccw_dev = (VFIOCCWDevice *)
358 object_dynamic_cast(OBJECT(dev_st), TYPE_VFIO_CCW);
359
360 if (virtio_ccw_dev) {
361 ccw_dev = CCW_DEVICE(virtio_ccw_dev);
362 if (virtio_net_dev) {
363 tmp_dt = CCW_DEVTYPE_VIRTIO_NET;
364 } else {
365 tmp_dt = CCW_DEVTYPE_VIRTIO;
366 }
367 } else if (vfio_ccw_dev) {
368 ccw_dev = CCW_DEVICE(vfio_ccw_dev);
369 tmp_dt = CCW_DEVTYPE_VFIO;
370 } else {
371 SCSIDevice *sd = (SCSIDevice *)
372 object_dynamic_cast(OBJECT(dev_st),
373 TYPE_SCSI_DEVICE);
374 if (sd) {
375 SCSIBus *sbus = scsi_bus_from_device(sd);
376 VirtIODevice *vdev = (VirtIODevice *)
377 object_dynamic_cast(OBJECT(sbus->qbus.parent),
378 TYPE_VIRTIO_DEVICE);
379 if (vdev) {
380 ccw_dev = (CcwDevice *)
381 object_dynamic_cast(OBJECT(qdev_get_parent_bus(DEVICE(vdev))->parent),
382 TYPE_CCW_DEVICE);
383 if (ccw_dev) {
384 tmp_dt = CCW_DEVTYPE_SCSI;
385 }
386 }
387 }
388 }
389 }
390 if (devtype) {
391 *devtype = tmp_dt;
392 }
393 return ccw_dev;
394 }
395
s390_ipl_map_iplb_chain(IplParameterBlock * iplb_chain)396 static uint64_t s390_ipl_map_iplb_chain(IplParameterBlock *iplb_chain)
397 {
398 S390IPLState *ipl = get_ipl_device();
399 uint16_t count = be16_to_cpu(ipl->qipl.chain_len);
400 uint64_t len = sizeof(IplParameterBlock) * count;
401 uint64_t chain_addr = find_iplb_chain_addr(ipl->bios_start_addr, count);
402
403 cpu_physical_memory_write(chain_addr, iplb_chain, len);
404 return chain_addr;
405 }
406
s390_ipl_fmt_loadparm(uint8_t * loadparm,char * str,Error ** errp)407 void s390_ipl_fmt_loadparm(uint8_t *loadparm, char *str, Error **errp)
408 {
409 /* Initialize the loadparm with spaces */
410 memset(loadparm, ' ', LOADPARM_LEN);
411 qdev_prop_sanitize_s390x_loadparm(loadparm, str, errp);
412 }
413
s390_ipl_convert_loadparm(char * ascii_lp,uint8_t * ebcdic_lp)414 void s390_ipl_convert_loadparm(char *ascii_lp, uint8_t *ebcdic_lp)
415 {
416 int i;
417
418 /* Initialize the loadparm with EBCDIC spaces (0x40) */
419 memset(ebcdic_lp, '@', LOADPARM_LEN);
420 for (i = 0; i < LOADPARM_LEN && ascii_lp[i]; i++) {
421 ebcdic_lp[i] = ascii2ebcdic[(uint8_t) ascii_lp[i]];
422 }
423 }
424
s390_build_iplb(DeviceState * dev_st,IplParameterBlock * iplb)425 static bool s390_build_iplb(DeviceState *dev_st, IplParameterBlock *iplb)
426 {
427 CcwDevice *ccw_dev = NULL;
428 SCSIDevice *sd;
429 int devtype;
430 uint8_t *lp;
431 g_autofree void *scsi_lp = NULL;
432
433 /*
434 * Currently allow IPL only from CCW devices.
435 */
436 ccw_dev = s390_get_ccw_device(dev_st, &devtype);
437 if (ccw_dev) {
438 lp = ccw_dev->loadparm;
439
440 switch (devtype) {
441 case CCW_DEVTYPE_SCSI:
442 sd = SCSI_DEVICE(dev_st);
443 scsi_lp = object_property_get_str(OBJECT(sd), "loadparm", NULL);
444 if (scsi_lp && strlen(scsi_lp) > 0) {
445 lp = scsi_lp;
446 }
447 iplb->len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
448 iplb->blk0_len =
449 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
450 iplb->pbt = S390_IPL_TYPE_QEMU_SCSI;
451 iplb->scsi.lun = cpu_to_be32(sd->lun);
452 iplb->scsi.target = cpu_to_be16(sd->id);
453 iplb->scsi.channel = cpu_to_be16(sd->channel);
454 iplb->scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
455 iplb->scsi.ssid = ccw_dev->sch->ssid & 3;
456 break;
457 case CCW_DEVTYPE_VFIO:
458 iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
459 iplb->pbt = S390_IPL_TYPE_CCW;
460 iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
461 iplb->ccw.ssid = ccw_dev->sch->ssid & 3;
462 break;
463 case CCW_DEVTYPE_VIRTIO_NET:
464 case CCW_DEVTYPE_VIRTIO:
465 iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
466 iplb->blk0_len =
467 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
468 iplb->pbt = S390_IPL_TYPE_CCW;
469 iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
470 iplb->ccw.ssid = ccw_dev->sch->ssid & 3;
471 break;
472 }
473
474 /* If the device loadparm is empty use the global machine loadparm */
475 if (memcmp(lp, NO_LOADPARM, 8) == 0) {
476 lp = S390_CCW_MACHINE(qdev_get_machine())->loadparm;
477 }
478
479 s390_ipl_convert_loadparm((char *)lp, iplb->loadparm);
480 iplb->flags |= DIAG308_FLAGS_LP_VALID;
481
482 return true;
483 }
484
485 return false;
486 }
487
s390_rebuild_iplb(uint16_t dev_index,IplParameterBlock * iplb)488 void s390_rebuild_iplb(uint16_t dev_index, IplParameterBlock *iplb)
489 {
490 S390IPLState *ipl = get_ipl_device();
491 uint16_t index;
492 index = ipl->rebuilt_iplb ? ipl->iplb_index : dev_index;
493
494 ipl->rebuilt_iplb = s390_build_iplb(get_boot_device(index), iplb);
495 ipl->iplb_index = index;
496 }
497
s390_init_all_iplbs(S390IPLState * ipl)498 static bool s390_init_all_iplbs(S390IPLState *ipl)
499 {
500 int iplb_num = 0;
501 IplParameterBlock iplb_chain[7];
502 DeviceState *dev_st = get_boot_device(0);
503 Object *machine = qdev_get_machine();
504
505 /*
506 * Parse the boot devices. Generate an IPLB for only the first boot device
507 * which will later be set with DIAG308.
508 */
509 if (!dev_st) {
510 ipl->qipl.chain_len = 0;
511 return false;
512 }
513
514 /* If no machine loadparm was defined fill it with spaces */
515 if (memcmp(S390_CCW_MACHINE(machine)->loadparm, NO_LOADPARM, 8) == 0) {
516 object_property_set_str(machine, "loadparm", " ", NULL);
517 }
518
519 iplb_num = 1;
520 s390_build_iplb(dev_st, &ipl->iplb);
521
522 /* Index any fallback boot devices */
523 while (get_boot_device(iplb_num)) {
524 iplb_num++;
525 }
526
527 if (iplb_num > MAX_BOOT_DEVS) {
528 warn_report("Excess boot devices defined! %d boot devices found, "
529 "but only the first %d will be considered.",
530 iplb_num, MAX_BOOT_DEVS);
531
532 iplb_num = MAX_BOOT_DEVS;
533 }
534
535 ipl->qipl.chain_len = cpu_to_be16(iplb_num - 1);
536
537 /*
538 * Build fallback IPLBs for any boot devices above index 0, up to a
539 * maximum amount as defined in ipl.h
540 */
541 if (iplb_num > 1) {
542 /* Start at 1 because the IPLB for boot index 0 is not chained */
543 for (int i = 1; i < iplb_num; i++) {
544 dev_st = get_boot_device(i);
545 s390_build_iplb(dev_st, &iplb_chain[i - 1]);
546 }
547
548 ipl->qipl.next_iplb = cpu_to_be64(s390_ipl_map_iplb_chain(iplb_chain));
549 }
550
551 return iplb_num;
552 }
553
update_machine_ipl_properties(IplParameterBlock * iplb)554 static void update_machine_ipl_properties(IplParameterBlock *iplb)
555 {
556 Object *machine = qdev_get_machine();
557 Error *err = NULL;
558
559 /* Sync loadparm */
560 if (iplb->flags & DIAG308_FLAGS_LP_VALID) {
561 uint8_t *ebcdic_loadparm = iplb->loadparm;
562 char ascii_loadparm[9];
563 int i;
564
565 for (i = 0; i < 8 && ebcdic_loadparm[i]; i++) {
566 ascii_loadparm[i] = ebcdic2ascii[(uint8_t) ebcdic_loadparm[i]];
567 }
568 ascii_loadparm[i] = 0;
569 object_property_set_str(machine, "loadparm", ascii_loadparm, &err);
570 } else {
571 object_property_set_str(machine, "loadparm", " ", &err);
572 }
573 if (err) {
574 warn_report_err(err);
575 }
576 }
577
s390_ipl_update_diag308(IplParameterBlock * iplb)578 void s390_ipl_update_diag308(IplParameterBlock *iplb)
579 {
580 S390IPLState *ipl = get_ipl_device();
581
582 /*
583 * The IPLB set and retrieved by subcodes 8/9 is completely
584 * separate from the one managed via subcodes 5/6.
585 */
586 if (iplb->pbt == S390_IPL_TYPE_PV) {
587 ipl->iplb_pv = *iplb;
588 ipl->iplb_valid_pv = true;
589 } else {
590 ipl->iplb = *iplb;
591 ipl->iplb_valid = true;
592 }
593
594 update_machine_ipl_properties(iplb);
595 }
596
s390_ipl_get_iplb_pv(void)597 IplParameterBlock *s390_ipl_get_iplb_pv(void)
598 {
599 S390IPLState *ipl = get_ipl_device();
600
601 if (!ipl->iplb_valid_pv) {
602 return NULL;
603 }
604 return &ipl->iplb_pv;
605 }
606
s390_ipl_get_iplb(void)607 IplParameterBlock *s390_ipl_get_iplb(void)
608 {
609 S390IPLState *ipl = get_ipl_device();
610
611 if (!ipl->iplb_valid) {
612 return NULL;
613 }
614 return &ipl->iplb;
615 }
616
s390_ipl_reset_request(CPUState * cs,enum s390_reset reset_type)617 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)
618 {
619 S390IPLState *ipl = get_ipl_device();
620 if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) {
621 /* use CPU 0 for full resets */
622 ipl->reset_cpu_index = 0;
623 } else {
624 ipl->reset_cpu_index = cs->cpu_index;
625 }
626
627 ipl->reset_type = reset_type;
628 if (reset_type == S390_RESET_MODIFIED_CLEAR ||
629 reset_type == S390_RESET_LOAD_NORMAL ||
630 reset_type == S390_RESET_PV) {
631 /* ignore -no-reboot, send no event */
632 qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
633 } else {
634 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
635 }
636 /* as this is triggered by a CPU, make sure to exit the loop */
637 if (tcg_enabled()) {
638 cpu_loop_exit(cs);
639 }
640 }
641
s390_ipl_get_reset_request(CPUState ** cs,enum s390_reset * reset_type)642 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type)
643 {
644 S390IPLState *ipl = get_ipl_device();
645
646 *cs = qemu_get_cpu(ipl->reset_cpu_index);
647 if (!*cs) {
648 /* use any CPU */
649 *cs = first_cpu;
650 }
651 *reset_type = ipl->reset_type;
652 }
653
s390_ipl_clear_reset_request(void)654 void s390_ipl_clear_reset_request(void)
655 {
656 S390IPLState *ipl = get_ipl_device();
657
658 ipl->reset_type = S390_RESET_EXTERNAL;
659 /* use CPU 0 for full resets */
660 ipl->reset_cpu_index = 0;
661 }
662
s390_ipl_prepare_qipl(S390CPU * cpu)663 static void s390_ipl_prepare_qipl(S390CPU *cpu)
664 {
665 S390IPLState *ipl = get_ipl_device();
666 uint8_t *addr;
667 uint64_t len = 4096;
668
669 addr = cpu_physical_memory_map(cpu->env.psa, &len, true);
670 if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
671 error_report("Cannot set QEMU IPL parameters");
672 return;
673 }
674 memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
675 cpu_physical_memory_unmap(addr, len, 1, len);
676 }
677
s390_ipl_prepare_pv_header(struct S390PVResponse * pv_resp,Error ** errp)678 int s390_ipl_prepare_pv_header(struct S390PVResponse *pv_resp, Error **errp)
679 {
680 IplParameterBlock *ipib = s390_ipl_get_iplb_pv();
681 IPLBlockPV *ipib_pv = &ipib->pv;
682 void *hdr = g_malloc(ipib_pv->pv_header_len);
683 int rc;
684
685 cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr,
686 ipib_pv->pv_header_len);
687 rc = s390_pv_set_sec_parms((uintptr_t)hdr, ipib_pv->pv_header_len,
688 pv_resp, errp);
689 g_free(hdr);
690 return rc;
691 }
692
s390_ipl_pv_unpack(struct S390PVResponse * pv_resp)693 int s390_ipl_pv_unpack(struct S390PVResponse *pv_resp)
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 pv_resp);
704 if (rc) {
705 break;
706 }
707 }
708 return rc;
709 }
710
s390_ipl_prepare_cpu(S390CPU * cpu)711 void s390_ipl_prepare_cpu(S390CPU *cpu)
712 {
713 S390IPLState *ipl = get_ipl_device();
714
715 cpu->env.psw.addr = ipl->start_addr;
716 cpu->env.psw.mask = IPL_PSW_MASK;
717
718 if (!ipl->kernel || ipl->iplb_valid) {
719 cpu->env.psw.addr = ipl->bios_start_addr;
720 if (!ipl->iplb_valid) {
721 ipl->iplb_valid = s390_init_all_iplbs(ipl);
722 } else {
723 ipl->qipl.chain_len = 0;
724 }
725 }
726 s390_ipl_set_boot_menu(ipl);
727 s390_ipl_prepare_qipl(cpu);
728 }
729
s390_ipl_reset(DeviceState * dev)730 static void s390_ipl_reset(DeviceState *dev)
731 {
732 S390IPLState *ipl = S390_IPL(dev);
733
734 if (ipl->reset_type != S390_RESET_REIPL) {
735 ipl->iplb_valid = false;
736 memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
737 }
738 }
739
s390_ipl_class_init(ObjectClass * klass,const void * data)740 static void s390_ipl_class_init(ObjectClass *klass, const void *data)
741 {
742 DeviceClass *dc = DEVICE_CLASS(klass);
743
744 dc->realize = s390_ipl_realize;
745 device_class_set_props(dc, s390_ipl_properties);
746 device_class_set_legacy_reset(dc, s390_ipl_reset);
747 dc->vmsd = &vmstate_ipl;
748 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
749 /* Reason: Loads the ROMs and thus can only be used one time - internally */
750 dc->user_creatable = false;
751 }
752
753 static const TypeInfo s390_ipl_info = {
754 .class_init = s390_ipl_class_init,
755 .parent = TYPE_DEVICE,
756 .name = TYPE_S390_IPL,
757 .instance_size = sizeof(S390IPLState),
758 };
759
s390_ipl_register_types(void)760 static void s390_ipl_register_types(void)
761 {
762 type_register_static(&s390_ipl_info);
763 }
764
765 type_init(s390_ipl_register_types)
766