4 * Copyright IBM, Corp. 2012
9 * This work is licensed under the terms of the GNU GPL, version 2 or (at your
10 * option) any later version. See the COPYING file in the top-level directory.
14 #include "qemu/osdep.h"
15 #include "qapi/error.h"
16 #include "sysemu/sysemu.h"
19 #include "hw/loader.h"
20 #include "hw/boards.h"
21 #include "hw/s390x/virtio-ccw.h"
22 #include "hw/s390x/css.h"
23 #include "hw/s390x/ebcdic.h"
25 #include "qemu/error-report.h"
26 #include "qemu/config-file.h"
27 #include "qemu/cutils.h"
28 #include "qemu/option.h"
30 #define KERN_IMAGE_START 0x010000UL
31 #define KERN_PARM_AREA 0x010480UL
32 #define INITRD_START 0x800000UL
33 #define INITRD_PARM_START 0x010408UL
34 #define INITRD_PARM_SIZE 0x010410UL
35 #define PARMFILE_START 0x001000UL
36 #define ZIPL_IMAGE_START 0x009000UL
37 #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
39 static bool iplb_extended_needed(void *opaque)
41 S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL));
43 return ipl->iplbext_migration;
46 static const VMStateDescription vmstate_iplb_extended = {
47 .name = "ipl/iplb_extended",
49 .minimum_version_id = 0,
50 .needed = iplb_extended_needed,
51 .fields = (VMStateField[]) {
52 VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200),
57 static const VMStateDescription vmstate_iplb = {
60 .minimum_version_id = 0,
61 .fields = (VMStateField[]) {
62 VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110),
63 VMSTATE_UINT16(devno, IplParameterBlock),
64 VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88),
67 .subsections = (const VMStateDescription*[]) {
68 &vmstate_iplb_extended,
73 static const VMStateDescription vmstate_ipl = {
76 .minimum_version_id = 0,
77 .fields = (VMStateField[]) {
78 VMSTATE_UINT64(compat_start_addr, S390IPLState),
79 VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
80 VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
81 VMSTATE_BOOL(iplb_valid, S390IPLState),
82 VMSTATE_UINT8(cssid, S390IPLState),
83 VMSTATE_UINT8(ssid, S390IPLState),
84 VMSTATE_UINT16(devno, S390IPLState),
89 static S390IPLState *get_ipl_device(void)
91 return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL));
94 static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr)
96 uint64_t dstaddr = *(uint64_t *) opaque;
98 * Assuming that our s390-ccw.img was linked for starting at address 0,
99 * we can simply add the destination address for the final location
101 return srcaddr + dstaddr;
104 static void s390_ipl_realize(DeviceState *dev, Error **errp)
106 S390IPLState *ipl = S390_IPL(dev);
107 uint64_t pentry = KERN_IMAGE_START;
115 * Always load the bios if it was enforced,
116 * even if an external kernel has been defined.
118 if (!ipl->kernel || ipl->enforce_bios) {
119 uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL;
121 if (bios_name == NULL) {
122 bios_name = ipl->firmware;
125 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
126 if (bios_filename == NULL) {
127 error_setg(&err, "could not find stage1 bootloader");
131 bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase,
132 &ipl->bios_start_addr, NULL, NULL, 1,
135 /* Adjust ELF start address to final location */
136 ipl->bios_start_addr += fwbase;
138 /* Try to load non-ELF file */
139 bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START,
141 ipl->bios_start_addr = ZIPL_IMAGE_START;
143 g_free(bios_filename);
145 if (bios_size == -1) {
146 error_setg(&err, "could not load bootloader '%s'", bios_name);
150 /* default boot target is the bios */
151 ipl->start_addr = ipl->bios_start_addr;
155 kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL,
156 NULL, 1, EM_S390, 0, 0);
157 if (kernel_size < 0) {
158 kernel_size = load_image_targphys(ipl->kernel, 0, ram_size);
160 if (kernel_size < 0) {
161 error_setg(&err, "could not load kernel '%s'", ipl->kernel);
165 * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the
166 * kernel parameters here as well. Note: For old kernels (up to 3.2)
167 * we can not rely on the ELF entry point - it was 0x800 (the SALIPL
168 * loader) and it won't work. For this case we force it to 0x10000, too.
170 if (pentry == KERN_IMAGE_START || pentry == 0x800) {
171 ipl->start_addr = KERN_IMAGE_START;
172 /* Overwrite parameters in the kernel image, which are "rom" */
173 strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline);
175 ipl->start_addr = pentry;
179 ram_addr_t initrd_offset;
182 initrd_offset = INITRD_START;
183 while (kernel_size + 0x100000 > initrd_offset) {
184 initrd_offset += 0x100000;
186 initrd_size = load_image_targphys(ipl->initrd, initrd_offset,
187 ram_size - initrd_offset);
188 if (initrd_size == -1) {
189 error_setg(&err, "could not load initrd '%s'", ipl->initrd);
194 * we have to overwrite values in the kernel image,
197 stq_p(rom_ptr(INITRD_PARM_START), initrd_offset);
198 stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size);
202 * Don't ever use the migrated values, they could come from a different
203 * BIOS and therefore don't work. But still migrate the values, so
204 * QEMUs relying on it don't break.
206 ipl->compat_start_addr = ipl->start_addr;
207 ipl->compat_bios_start_addr = ipl->bios_start_addr;
208 qemu_register_reset(qdev_reset_all_fn, dev);
210 error_propagate(errp, err);
213 static Property s390_ipl_properties[] = {
214 DEFINE_PROP_STRING("kernel", S390IPLState, kernel),
215 DEFINE_PROP_STRING("initrd", S390IPLState, initrd),
216 DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline),
217 DEFINE_PROP_STRING("firmware", S390IPLState, firmware),
218 DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw),
219 DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false),
220 DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration,
222 DEFINE_PROP_END_OF_LIST(),
225 static void s390_ipl_set_boot_menu(S390IPLState *ipl)
227 QemuOptsList *plist = qemu_find_opts("boot-opts");
228 QemuOpts *opts = QTAILQ_FIRST(&plist->head);
229 uint8_t *flags = &ipl->qipl.qipl_flags;
230 uint32_t *timeout = &ipl->qipl.boot_menu_timeout;
232 unsigned long splash_time = 0;
234 if (!get_boot_device(0)) {
236 error_report("boot menu requires a bootindex to be specified for "
242 switch (ipl->iplb.pbt) {
243 case S390_IPL_TYPE_CCW:
244 /* In the absence of -boot menu, use zipl parameters */
245 if (!qemu_opt_get(opts, "menu")) {
246 *flags |= QIPL_FLAG_BM_OPTS_ZIPL;
250 case S390_IPL_TYPE_QEMU_SCSI:
253 error_report("boot menu is not supported for this device type.");
261 *flags |= QIPL_FLAG_BM_OPTS_CMD;
263 tmp = qemu_opt_get(opts, "splash-time");
265 if (tmp && qemu_strtoul(tmp, NULL, 10, &splash_time)) {
266 error_report("splash-time is invalid, forcing it to 0.");
271 if (splash_time > 0xffffffff) {
272 error_report("splash-time is too large, forcing it to max value.");
273 *timeout = 0xffffffff;
277 *timeout = cpu_to_be32(splash_time);
280 static bool s390_gen_initial_iplb(S390IPLState *ipl)
284 dev_st = get_boot_device(0);
286 VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *)
287 object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent),
288 TYPE_VIRTIO_CCW_DEVICE);
289 SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st),
291 VirtIONet *vn = (VirtIONet *) object_dynamic_cast(OBJECT(dev_st),
297 if (virtio_ccw_dev) {
298 CcwDevice *ccw_dev = CCW_DEVICE(virtio_ccw_dev);
300 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN);
302 cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN);
303 ipl->iplb.pbt = S390_IPL_TYPE_CCW;
304 ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno);
305 ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3;
307 SCSIBus *bus = scsi_bus_from_device(sd);
308 VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus);
309 VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw, vdev);
312 ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw),
314 if (!ccw_dev) { /* It might be a PCI device instead */
318 ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN);
320 cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN);
321 ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI;
322 ipl->iplb.scsi.lun = cpu_to_be32(sd->lun);
323 ipl->iplb.scsi.target = cpu_to_be16(sd->id);
324 ipl->iplb.scsi.channel = cpu_to_be16(sd->channel);
325 ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno);
326 ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3;
328 return false; /* unknown device */
331 if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) {
332 ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID;
340 int s390_ipl_set_loadparm(uint8_t *loadparm)
342 MachineState *machine = MACHINE(qdev_get_machine());
343 char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL);
348 /* lp is an uppercase string without leading/embedded spaces */
349 for (i = 0; i < 8 && lp[i]; i++) {
350 loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]];
360 static int load_netboot_image(Error **errp)
362 S390IPLState *ipl = get_ipl_device();
363 char *netboot_filename;
364 MemoryRegion *sysmem = get_system_memory();
365 MemoryRegion *mr = NULL;
366 void *ram_ptr = NULL;
369 mr = memory_region_find(sysmem, 0, 1).mr;
371 error_setg(errp, "Failed to find memory region at address 0");
375 ram_ptr = memory_region_get_ram_ptr(mr);
377 error_setg(errp, "No RAM found");
381 netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw);
382 if (netboot_filename == NULL) {
383 error_setg(errp, "Could not find network bootloader");
387 img_size = load_elf_ram(netboot_filename, NULL, NULL, &ipl->start_addr,
388 NULL, NULL, 1, EM_S390, 0, 0, NULL, false);
391 img_size = load_image_size(netboot_filename, ram_ptr, ram_size);
392 ipl->start_addr = KERN_IMAGE_START;
396 error_setg(errp, "Failed to load network bootloader");
399 g_free(netboot_filename);
402 memory_region_unref(mr);
406 static bool is_virtio_net_device(IplParameterBlock *iplb)
412 SubchDev *sch = NULL;
414 if (iplb->pbt != S390_IPL_TYPE_CCW) {
418 devno = be16_to_cpu(iplb->ccw.devno);
419 ssid = iplb->ccw.ssid & 3;
421 for (schid = 0; schid < MAX_SCHID; schid++) {
422 for (cssid = 0; cssid < MAX_CSSID; cssid++) {
423 sch = css_find_subch(1, cssid, ssid, schid);
425 if (sch && sch->devno == devno) {
426 return sch->id.cu_model == VIRTIO_ID_NET;
433 void s390_ipl_update_diag308(IplParameterBlock *iplb)
435 S390IPLState *ipl = get_ipl_device();
438 ipl->iplb_valid = true;
439 ipl->netboot = is_virtio_net_device(iplb);
442 IplParameterBlock *s390_ipl_get_iplb(void)
444 S390IPLState *ipl = get_ipl_device();
446 if (!ipl->iplb_valid) {
452 void s390_reipl_request(void)
454 S390IPLState *ipl = get_ipl_device();
456 ipl->reipl_requested = true;
457 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
460 static void s390_ipl_prepare_qipl(S390CPU *cpu)
462 S390IPLState *ipl = get_ipl_device();
466 addr = cpu_physical_memory_map(cpu->env.psa, &len, 1);
467 if (!addr || len < QIPL_ADDRESS + sizeof(QemuIplParameters)) {
468 error_report("Cannot set QEMU IPL parameters");
471 memcpy(addr + QIPL_ADDRESS, &ipl->qipl, sizeof(QemuIplParameters));
472 cpu_physical_memory_unmap(addr, len, 1, len);
475 void s390_ipl_prepare_cpu(S390CPU *cpu)
477 S390IPLState *ipl = get_ipl_device();
480 cpu->env.psw.addr = ipl->start_addr;
481 cpu->env.psw.mask = IPL_PSW_MASK;
483 if (!ipl->kernel || ipl->iplb_valid) {
484 cpu->env.psw.addr = ipl->bios_start_addr;
485 if (!ipl->iplb_valid) {
486 ipl->iplb_valid = s390_gen_initial_iplb(ipl);
490 if (load_netboot_image(&err) < 0) {
491 error_report_err(err);
492 vm_stop(RUN_STATE_INTERNAL_ERROR);
494 ipl->qipl.netboot_start_addr = cpu_to_be64(ipl->start_addr);
496 s390_ipl_set_boot_menu(ipl);
497 s390_ipl_prepare_qipl(cpu);
500 static void s390_ipl_reset(DeviceState *dev)
502 S390IPLState *ipl = S390_IPL(dev);
504 if (!ipl->reipl_requested) {
505 ipl->iplb_valid = false;
506 memset(&ipl->iplb, 0, sizeof(IplParameterBlock));
508 ipl->reipl_requested = false;
511 static void s390_ipl_class_init(ObjectClass *klass, void *data)
513 DeviceClass *dc = DEVICE_CLASS(klass);
515 dc->realize = s390_ipl_realize;
516 dc->props = s390_ipl_properties;
517 dc->reset = s390_ipl_reset;
518 dc->vmsd = &vmstate_ipl;
519 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
520 /* Reason: Loads the ROMs and thus can only be used one time - internally */
521 dc->user_creatable = false;
524 static const TypeInfo s390_ipl_info = {
525 .class_init = s390_ipl_class_init,
526 .parent = TYPE_DEVICE,
527 .name = TYPE_S390_IPL,
528 .instance_size = sizeof(S390IPLState),
531 static void s390_ipl_register_types(void)
533 type_register_static(&s390_ipl_info);
536 type_init(s390_ipl_register_types)