| /* |
| * bootloader support |
| * |
| * Copyright IBM, Corp. 2012 |
| * |
| * Authors: |
| * Christian Borntraeger <borntraeger@de.ibm.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or (at your |
| * option) any later version. See the COPYING file in the top-level directory. |
| * |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qapi/error.h" |
| #include "sysemu/sysemu.h" |
| #include "cpu.h" |
| #include "elf.h" |
| #include "hw/loader.h" |
| #include "hw/boards.h" |
| #include "hw/s390x/virtio-ccw.h" |
| #include "hw/s390x/css.h" |
| #include "hw/s390x/ebcdic.h" |
| #include "ipl.h" |
| #include "qemu/error-report.h" |
| |
| #define KERN_IMAGE_START 0x010000UL |
| #define KERN_PARM_AREA 0x010480UL |
| #define INITRD_START 0x800000UL |
| #define INITRD_PARM_START 0x010408UL |
| #define INITRD_PARM_SIZE 0x010410UL |
| #define PARMFILE_START 0x001000UL |
| #define ZIPL_IMAGE_START 0x009000UL |
| #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) |
| |
| static bool iplb_extended_needed(void *opaque) |
| { |
| S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL)); |
| |
| return ipl->iplbext_migration; |
| } |
| |
| static const VMStateDescription vmstate_iplb_extended = { |
| .name = "ipl/iplb_extended", |
| .version_id = 0, |
| .minimum_version_id = 0, |
| .needed = iplb_extended_needed, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static const VMStateDescription vmstate_iplb = { |
| .name = "ipl/iplb", |
| .version_id = 0, |
| .minimum_version_id = 0, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110), |
| VMSTATE_UINT16(devno, IplParameterBlock), |
| VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88), |
| VMSTATE_END_OF_LIST() |
| }, |
| .subsections = (const VMStateDescription*[]) { |
| &vmstate_iplb_extended, |
| NULL |
| } |
| }; |
| |
| static const VMStateDescription vmstate_ipl = { |
| .name = "ipl", |
| .version_id = 0, |
| .minimum_version_id = 0, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT64(compat_start_addr, S390IPLState), |
| VMSTATE_UINT64(compat_bios_start_addr, S390IPLState), |
| VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock), |
| VMSTATE_BOOL(iplb_valid, S390IPLState), |
| VMSTATE_UINT8(cssid, S390IPLState), |
| VMSTATE_UINT8(ssid, S390IPLState), |
| VMSTATE_UINT16(devno, S390IPLState), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static S390IPLState *get_ipl_device(void) |
| { |
| return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL)); |
| } |
| |
| static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr) |
| { |
| uint64_t dstaddr = *(uint64_t *) opaque; |
| /* |
| * Assuming that our s390-ccw.img was linked for starting at address 0, |
| * we can simply add the destination address for the final location |
| */ |
| return srcaddr + dstaddr; |
| } |
| |
| static void s390_ipl_realize(DeviceState *dev, Error **errp) |
| { |
| S390IPLState *ipl = S390_IPL(dev); |
| uint64_t pentry = KERN_IMAGE_START; |
| int kernel_size; |
| Error *err = NULL; |
| |
| int bios_size; |
| char *bios_filename; |
| |
| /* |
| * Always load the bios if it was enforced, |
| * even if an external kernel has been defined. |
| */ |
| if (!ipl->kernel || ipl->enforce_bios) { |
| uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL; |
| |
| if (bios_name == NULL) { |
| bios_name = ipl->firmware; |
| } |
| |
| bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); |
| if (bios_filename == NULL) { |
| error_setg(&err, "could not find stage1 bootloader"); |
| goto error; |
| } |
| |
| bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase, |
| &ipl->bios_start_addr, NULL, NULL, 1, |
| EM_S390, 0, 0); |
| if (bios_size > 0) { |
| /* Adjust ELF start address to final location */ |
| ipl->bios_start_addr += fwbase; |
| } else { |
| /* Try to load non-ELF file */ |
| bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, |
| 4096); |
| ipl->bios_start_addr = ZIPL_IMAGE_START; |
| } |
| g_free(bios_filename); |
| |
| if (bios_size == -1) { |
| error_setg(&err, "could not load bootloader '%s'", bios_name); |
| goto error; |
| } |
| |
| /* default boot target is the bios */ |
| ipl->start_addr = ipl->bios_start_addr; |
| } |
| |
| if (ipl->kernel) { |
| kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL, |
| NULL, 1, EM_S390, 0, 0); |
| if (kernel_size < 0) { |
| kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); |
| } |
| if (kernel_size < 0) { |
| error_setg(&err, "could not load kernel '%s'", ipl->kernel); |
| goto error; |
| } |
| /* |
| * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the |
| * kernel parameters here as well. Note: For old kernels (up to 3.2) |
| * we can not rely on the ELF entry point - it was 0x800 (the SALIPL |
| * loader) and it won't work. For this case we force it to 0x10000, too. |
| */ |
| if (pentry == KERN_IMAGE_START || pentry == 0x800) { |
| ipl->start_addr = KERN_IMAGE_START; |
| /* Overwrite parameters in the kernel image, which are "rom" */ |
| strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline); |
| } else { |
| ipl->start_addr = pentry; |
| } |
| |
| if (ipl->initrd) { |
| ram_addr_t initrd_offset; |
| int initrd_size; |
| |
| initrd_offset = INITRD_START; |
| while (kernel_size + 0x100000 > initrd_offset) { |
| initrd_offset += 0x100000; |
| } |
| initrd_size = load_image_targphys(ipl->initrd, initrd_offset, |
| ram_size - initrd_offset); |
| if (initrd_size == -1) { |
| error_setg(&err, "could not load initrd '%s'", ipl->initrd); |
| goto error; |
| } |
| |
| /* |
| * we have to overwrite values in the kernel image, |
| * which are "rom" |
| */ |
| stq_p(rom_ptr(INITRD_PARM_START), initrd_offset); |
| stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size); |
| } |
| } |
| /* |
| * Don't ever use the migrated values, they could come from a different |
| * BIOS and therefore don't work. But still migrate the values, so |
| * QEMUs relying on it don't break. |
| */ |
| ipl->compat_start_addr = ipl->start_addr; |
| ipl->compat_bios_start_addr = ipl->bios_start_addr; |
| qemu_register_reset(qdev_reset_all_fn, dev); |
| error: |
| error_propagate(errp, err); |
| } |
| |
| static Property s390_ipl_properties[] = { |
| DEFINE_PROP_STRING("kernel", S390IPLState, kernel), |
| DEFINE_PROP_STRING("initrd", S390IPLState, initrd), |
| DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), |
| DEFINE_PROP_STRING("firmware", S390IPLState, firmware), |
| DEFINE_PROP_STRING("netboot_fw", S390IPLState, netboot_fw), |
| DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), |
| DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration, |
| true), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static bool s390_gen_initial_iplb(S390IPLState *ipl) |
| { |
| DeviceState *dev_st; |
| |
| dev_st = get_boot_device(0); |
| if (dev_st) { |
| VirtioCcwDevice *virtio_ccw_dev = (VirtioCcwDevice *) |
| object_dynamic_cast(OBJECT(qdev_get_parent_bus(dev_st)->parent), |
| TYPE_VIRTIO_CCW_DEVICE); |
| SCSIDevice *sd = (SCSIDevice *) object_dynamic_cast(OBJECT(dev_st), |
| TYPE_SCSI_DEVICE); |
| VirtIONet *vn = (VirtIONet *) object_dynamic_cast(OBJECT(dev_st), |
| TYPE_VIRTIO_NET); |
| |
| if (vn) { |
| ipl->netboot = true; |
| } |
| if (virtio_ccw_dev) { |
| CcwDevice *ccw_dev = CCW_DEVICE(virtio_ccw_dev); |
| |
| ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); |
| ipl->iplb.blk0_len = |
| cpu_to_be32(S390_IPLB_MIN_CCW_LEN - S390_IPLB_HEADER_LEN); |
| ipl->iplb.pbt = S390_IPL_TYPE_CCW; |
| ipl->iplb.ccw.devno = cpu_to_be16(ccw_dev->sch->devno); |
| ipl->iplb.ccw.ssid = ccw_dev->sch->ssid & 3; |
| } else if (sd) { |
| SCSIBus *bus = scsi_bus_from_device(sd); |
| VirtIOSCSI *vdev = container_of(bus, VirtIOSCSI, bus); |
| VirtIOSCSICcw *scsi_ccw = container_of(vdev, VirtIOSCSICcw, vdev); |
| CcwDevice *ccw_dev; |
| |
| ccw_dev = (CcwDevice *)object_dynamic_cast(OBJECT(scsi_ccw), |
| TYPE_CCW_DEVICE); |
| if (!ccw_dev) { /* It might be a PCI device instead */ |
| return false; |
| } |
| |
| ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN); |
| ipl->iplb.blk0_len = |
| cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN - S390_IPLB_HEADER_LEN); |
| ipl->iplb.pbt = S390_IPL_TYPE_QEMU_SCSI; |
| ipl->iplb.scsi.lun = cpu_to_be32(sd->lun); |
| ipl->iplb.scsi.target = cpu_to_be16(sd->id); |
| ipl->iplb.scsi.channel = cpu_to_be16(sd->channel); |
| ipl->iplb.scsi.devno = cpu_to_be16(ccw_dev->sch->devno); |
| ipl->iplb.scsi.ssid = ccw_dev->sch->ssid & 3; |
| } else { |
| return false; /* unknown device */ |
| } |
| |
| if (!s390_ipl_set_loadparm(ipl->iplb.loadparm)) { |
| ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID; |
| } |
| return true; |
| } |
| |
| return false; |
| } |
| |
| int s390_ipl_set_loadparm(uint8_t *loadparm) |
| { |
| MachineState *machine = MACHINE(qdev_get_machine()); |
| char *lp = object_property_get_str(OBJECT(machine), "loadparm", NULL); |
| |
| if (lp) { |
| int i; |
| |
| /* lp is an uppercase string without leading/embedded spaces */ |
| for (i = 0; i < 8 && lp[i]; i++) { |
| loadparm[i] = ascii2ebcdic[(uint8_t) lp[i]]; |
| } |
| |
| g_free(lp); |
| return 0; |
| } |
| |
| return -1; |
| } |
| |
| static int load_netboot_image(Error **errp) |
| { |
| S390IPLState *ipl = get_ipl_device(); |
| char *netboot_filename; |
| MemoryRegion *sysmem = get_system_memory(); |
| MemoryRegion *mr = NULL; |
| void *ram_ptr = NULL; |
| int img_size = -1; |
| |
| mr = memory_region_find(sysmem, 0, 1).mr; |
| if (!mr) { |
| error_setg(errp, "Failed to find memory region at address 0"); |
| return -1; |
| } |
| |
| ram_ptr = memory_region_get_ram_ptr(mr); |
| if (!ram_ptr) { |
| error_setg(errp, "No RAM found"); |
| goto unref_mr; |
| } |
| |
| netboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, ipl->netboot_fw); |
| if (netboot_filename == NULL) { |
| error_setg(errp, "Could not find network bootloader"); |
| goto unref_mr; |
| } |
| |
| img_size = load_elf_ram(netboot_filename, NULL, NULL, &ipl->start_addr, |
| NULL, NULL, 1, EM_S390, 0, 0, NULL, false); |
| |
| if (img_size < 0) { |
| img_size = load_image_size(netboot_filename, ram_ptr, ram_size); |
| ipl->start_addr = KERN_IMAGE_START; |
| } |
| |
| if (img_size < 0) { |
| error_setg(errp, "Failed to load network bootloader"); |
| } |
| |
| g_free(netboot_filename); |
| |
| unref_mr: |
| memory_region_unref(mr); |
| return img_size; |
| } |
| |
| static bool is_virtio_net_device(IplParameterBlock *iplb) |
| { |
| uint8_t cssid; |
| uint8_t ssid; |
| uint16_t devno; |
| uint16_t schid; |
| SubchDev *sch = NULL; |
| |
| if (iplb->pbt != S390_IPL_TYPE_CCW) { |
| return false; |
| } |
| |
| devno = be16_to_cpu(iplb->ccw.devno); |
| ssid = iplb->ccw.ssid & 3; |
| |
| for (schid = 0; schid < MAX_SCHID; schid++) { |
| for (cssid = 0; cssid < MAX_CSSID; cssid++) { |
| sch = css_find_subch(1, cssid, ssid, schid); |
| |
| if (sch && sch->devno == devno) { |
| return sch->id.cu_model == VIRTIO_ID_NET; |
| } |
| } |
| } |
| return false; |
| } |
| |
| void s390_ipl_update_diag308(IplParameterBlock *iplb) |
| { |
| S390IPLState *ipl = get_ipl_device(); |
| |
| ipl->iplb = *iplb; |
| ipl->iplb_valid = true; |
| ipl->netboot = is_virtio_net_device(iplb); |
| } |
| |
| IplParameterBlock *s390_ipl_get_iplb(void) |
| { |
| S390IPLState *ipl = get_ipl_device(); |
| |
| if (!ipl->iplb_valid) { |
| return NULL; |
| } |
| return &ipl->iplb; |
| } |
| |
| void s390_reipl_request(void) |
| { |
| S390IPLState *ipl = get_ipl_device(); |
| |
| ipl->reipl_requested = true; |
| qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
| } |
| |
| void s390_ipl_prepare_cpu(S390CPU *cpu) |
| { |
| S390IPLState *ipl = get_ipl_device(); |
| Error *err = NULL; |
| |
| cpu->env.psw.addr = ipl->start_addr; |
| cpu->env.psw.mask = IPL_PSW_MASK; |
| |
| if (!ipl->kernel || ipl->iplb_valid) { |
| cpu->env.psw.addr = ipl->bios_start_addr; |
| if (!ipl->iplb_valid) { |
| ipl->iplb_valid = s390_gen_initial_iplb(ipl); |
| } |
| } |
| if (ipl->netboot) { |
| if (load_netboot_image(&err) < 0) { |
| error_report_err(err); |
| vm_stop(RUN_STATE_INTERNAL_ERROR); |
| } |
| ipl->iplb.ccw.netboot_start_addr = cpu_to_be64(ipl->start_addr); |
| } |
| } |
| |
| static void s390_ipl_reset(DeviceState *dev) |
| { |
| S390IPLState *ipl = S390_IPL(dev); |
| |
| if (!ipl->reipl_requested) { |
| ipl->iplb_valid = false; |
| memset(&ipl->iplb, 0, sizeof(IplParameterBlock)); |
| } |
| ipl->reipl_requested = false; |
| } |
| |
| static void s390_ipl_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| dc->realize = s390_ipl_realize; |
| dc->props = s390_ipl_properties; |
| dc->reset = s390_ipl_reset; |
| dc->vmsd = &vmstate_ipl; |
| set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
| /* Reason: Loads the ROMs and thus can only be used one time - internally */ |
| dc->user_creatable = false; |
| } |
| |
| static const TypeInfo s390_ipl_info = { |
| .class_init = s390_ipl_class_init, |
| .parent = TYPE_DEVICE, |
| .name = TYPE_S390_IPL, |
| .instance_size = sizeof(S390IPLState), |
| }; |
| |
| static void s390_ipl_register_types(void) |
| { |
| type_register_static(&s390_ipl_info); |
| } |
| |
| type_init(s390_ipl_register_types) |
