diff options
Diffstat (limited to 'src/hw/s390x/ipl.c')
| -rw-r--r-- | src/hw/s390x/ipl.c | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/src/hw/s390x/ipl.c b/src/hw/s390x/ipl.c new file mode 100644 index 0000000..b91fcc6 --- /dev/null +++ b/src/hw/s390x/ipl.c @@ -0,0 +1,296 @@ +/* + * 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 "sysemu/sysemu.h" +#include "cpu.h" +#include "elf.h" +#include "hw/loader.h" +#include "hw/s390x/virtio-ccw.h" +#include "hw/s390x/css.h" +#include "ipl.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 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() + } +}; + +static const VMStateDescription vmstate_ipl = { + .name = "ipl", + .version_id = 0, + .minimum_version_id = 0, + .fields = (VMStateField[]) { + VMSTATE_UINT64(start_addr, S390IPLState), + VMSTATE_UINT64(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 *l_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(&l_err, "could not find stage1 bootloader\n"); + goto error; + } + + bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase, + &ipl->bios_start_addr, NULL, NULL, 1, + EM_S390, 0); + if (bios_size > 0) { + /* Adjust ELF start address to final location */ + ipl->bios_start_addr += fwbase; + } else { + /* Try to load non-ELF file (e.g. s390-zipl.rom) */ + 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(&l_err, "could not load bootloader '%s'\n", 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); + if (kernel_size < 0) { + kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); + } + if (kernel_size < 0) { + error_setg(&l_err, "could not load kernel '%s'\n", 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(&l_err, "could not load initrd '%s'\n", 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); + } + } + qemu_register_reset(qdev_reset_all_fn, dev); +error: + error_propagate(errp, l_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_BOOL("enforce_bios", S390IPLState, enforce_bios, false), + DEFINE_PROP_END_OF_LIST(), +}; + +/* + * In addition to updating the iplstate, this function returns: + * - 0 if system was ipled with external kernel + * - -1 if no valid boot device was found + * - ccw id of the boot device otherwise + */ +static uint64_t s390_update_iplstate(S390IPLState *ipl) +{ + DeviceState *dev_st; + + if (ipl->iplb_valid) { + ipl->cssid = 0; + ipl->ssid = 0; + ipl->devno = ipl->iplb.devno; + goto out; + } + + if (ipl->kernel) { + return 0; + } + + dev_st = get_boot_device(0); + if (dev_st) { + VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast( + OBJECT(qdev_get_parent_bus(dev_st)->parent), + TYPE_VIRTIO_CCW_DEVICE); + if (ccw_dev) { + ipl->cssid = ccw_dev->sch->cssid; + ipl->ssid = ccw_dev->sch->ssid; + ipl->devno = ccw_dev->sch->devno; + goto out; + } + } + + return -1; +out: + return (uint32_t) (ipl->cssid << 24 | ipl->ssid << 16 | ipl->devno); +} + +void s390_ipl_update_diag308(IplParameterBlock *iplb) +{ + S390IPLState *ipl = get_ipl_device(); + + ipl->iplb = *iplb; + ipl->iplb_valid = true; +} + +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(); +} + +void s390_ipl_prepare_cpu(S390CPU *cpu) +{ + S390IPLState *ipl = get_ipl_device(); + + 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; + cpu->env.regs[7] = s390_update_iplstate(ipl); + } +} + +static void s390_ipl_reset(DeviceState *dev) +{ + S390IPLState *ipl = S390_IPL(dev); + + if (!ipl->reipl_requested) { + ipl->iplb_valid = false; + } + 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); +} + +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) |
