diff options
| -rw-r--r-- | hw/s390x/ipl.c | 129 | ||||
| -rw-r--r-- | hw/s390x/ipl.h | 1 | ||||
| -rw-r--r-- | include/hw/s390x/ipl/qipl.h | 4 |
3 files changed, 105 insertions, 29 deletions
diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c index 656996b500..b9d741d0b0 100644 --- a/hw/s390x/ipl.c +++ b/hw/s390x/ipl.c @@ -56,6 +56,13 @@ static bool iplb_extended_needed(void *opaque) return ipl->iplbext_migration; } +/* Place the IPLB chain immediately before the BIOS in memory */ +static uint64_t find_iplb_chain_addr(uint64_t bios_addr, uint16_t count) +{ + return (bios_addr & TARGET_PAGE_MASK) + - (count * sizeof(IplParameterBlock)); +} + static const VMStateDescription vmstate_iplb_extended = { .name = "ipl/iplb_extended", .version_id = 0, @@ -398,6 +405,17 @@ static CcwDevice *s390_get_ccw_device(DeviceState *dev_st, int *devtype) return ccw_dev; } +static uint64_t s390_ipl_map_iplb_chain(IplParameterBlock *iplb_chain) +{ + S390IPLState *ipl = get_ipl_device(); + uint16_t count = be16_to_cpu(ipl->qipl.chain_len); + uint64_t len = sizeof(IplParameterBlock) * count; + uint64_t chain_addr = find_iplb_chain_addr(ipl->bios_start_addr, count); + + cpu_physical_memory_write(chain_addr, iplb_chain, len); + return chain_addr; +} + void s390_ipl_fmt_loadparm(uint8_t *loadparm, char *str, Error **errp) { int i; @@ -428,54 +446,51 @@ void s390_ipl_convert_loadparm(char *ascii_lp, uint8_t *ebcdic_lp) } } -static bool s390_gen_initial_iplb(S390IPLState *ipl) +static bool s390_build_iplb(DeviceState *dev_st, IplParameterBlock *iplb) { - DeviceState *dev_st; + S390IPLState *ipl = get_ipl_device(); CcwDevice *ccw_dev = NULL; SCSIDevice *sd; int devtype; uint8_t *lp; - dev_st = get_boot_device(0); - if (dev_st) { - ccw_dev = s390_get_ccw_device(dev_st, &devtype); - } - /* * Currently allow IPL only from CCW devices. */ + ccw_dev = s390_get_ccw_device(dev_st, &devtype); if (ccw_dev) { lp = ccw_dev->loadparm; switch (devtype) { case CCW_DEVTYPE_SCSI: sd = SCSI_DEVICE(dev_st); - ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN); - ipl->iplb.blk0_len = + iplb->len = cpu_to_be32(S390_IPLB_MIN_QEMU_SCSI_LEN); + 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; + iplb->pbt = S390_IPL_TYPE_QEMU_SCSI; + iplb->scsi.lun = cpu_to_be32(sd->lun); + iplb->scsi.target = cpu_to_be16(sd->id); + iplb->scsi.channel = cpu_to_be16(sd->channel); + iplb->scsi.devno = cpu_to_be16(ccw_dev->sch->devno); + iplb->scsi.ssid = ccw_dev->sch->ssid & 3; break; case CCW_DEVTYPE_VFIO: - ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_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; + iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); + iplb->pbt = S390_IPL_TYPE_CCW; + iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno); + iplb->ccw.ssid = ccw_dev->sch->ssid & 3; break; case CCW_DEVTYPE_VIRTIO_NET: + /* The S390IPLState netboot is true if ANY IPLB may use netboot */ ipl->netboot = true; /* Fall through to CCW_DEVTYPE_VIRTIO case */ case CCW_DEVTYPE_VIRTIO: - ipl->iplb.len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); - ipl->iplb.blk0_len = + iplb->len = cpu_to_be32(S390_IPLB_MIN_CCW_LEN); + 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; + iplb->pbt = S390_IPL_TYPE_CCW; + iplb->ccw.devno = cpu_to_be16(ccw_dev->sch->devno); + iplb->ccw.ssid = ccw_dev->sch->ssid & 3; break; } @@ -484,8 +499,8 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl) lp = S390_CCW_MACHINE(qdev_get_machine())->loadparm; } - s390_ipl_convert_loadparm((char *)lp, ipl->iplb.loadparm); - ipl->iplb.flags |= DIAG308_FLAGS_LP_VALID; + s390_ipl_convert_loadparm((char *)lp, iplb->loadparm); + iplb->flags |= DIAG308_FLAGS_LP_VALID; return true; } @@ -493,6 +508,62 @@ static bool s390_gen_initial_iplb(S390IPLState *ipl) return false; } +static bool s390_init_all_iplbs(S390IPLState *ipl) +{ + int iplb_num = 0; + IplParameterBlock iplb_chain[7]; + DeviceState *dev_st = get_boot_device(0); + Object *machine = qdev_get_machine(); + + /* + * Parse the boot devices. Generate an IPLB for only the first boot device + * which will later be set with DIAG308. + */ + if (!dev_st) { + ipl->qipl.chain_len = 0; + return false; + } + + /* If no machine loadparm was defined fill it with spaces */ + if (memcmp(S390_CCW_MACHINE(machine)->loadparm, NO_LOADPARM, 8) == 0) { + object_property_set_str(machine, "loadparm", " ", NULL); + } + + iplb_num = 1; + s390_build_iplb(dev_st, &ipl->iplb); + + /* Index any fallback boot devices */ + while (get_boot_device(iplb_num)) { + iplb_num++; + } + + if (iplb_num > MAX_BOOT_DEVS) { + warn_report("Excess boot devices defined! %d boot devices found, " + "but only the first %d will be considered.", + iplb_num, MAX_BOOT_DEVS); + + iplb_num = MAX_BOOT_DEVS; + } + + ipl->qipl.chain_len = cpu_to_be16(iplb_num - 1); + + /* + * Build fallback IPLBs for any boot devices above index 0, up to a + * maximum amount as defined in ipl.h + */ + if (iplb_num > 1) { + /* Start at 1 because the IPLB for boot index 0 is not chained */ + for (int i = 1; i < iplb_num; i++) { + dev_st = get_boot_device(i); + s390_build_iplb(dev_st, &iplb_chain[i - 1]); + } + + ipl->qipl.next_iplb = cpu_to_be64(s390_ipl_map_iplb_chain(iplb_chain)); + } + + return iplb_num; +} + static bool is_virtio_ccw_device_of_type(IplParameterBlock *iplb, int virtio_id) { @@ -620,7 +691,7 @@ void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type) * this is the original boot device's SCSI * so restore IPL parameter info from it */ - ipl->iplb_valid = s390_gen_initial_iplb(ipl); + ipl->iplb_valid = s390_build_iplb(get_boot_device(0), &ipl->iplb); } } if (reset_type == S390_RESET_MODIFIED_CLEAR || @@ -714,7 +785,9 @@ void s390_ipl_prepare_cpu(S390CPU *cpu) 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); + ipl->iplb_valid = s390_init_all_iplbs(ipl); + } else { + ipl->qipl.chain_len = 0; } } s390_ipl_set_boot_menu(ipl); diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h index b670bad551..54eb48fd6e 100644 --- a/hw/s390x/ipl.h +++ b/hw/s390x/ipl.h @@ -20,6 +20,7 @@ #include "qom/object.h" #define DIAG308_FLAGS_LP_VALID 0x80 +#define MAX_BOOT_DEVS 8 /* Max number of devices that may have a bootindex */ void s390_ipl_convert_loadparm(char *ascii_lp, uint8_t *ebcdic_lp); void s390_ipl_fmt_loadparm(uint8_t *loadparm, char *str, Error **errp); diff --git a/include/hw/s390x/ipl/qipl.h b/include/hw/s390x/ipl/qipl.h index b67d2ae061..1da4f75aa8 100644 --- a/include/hw/s390x/ipl/qipl.h +++ b/include/hw/s390x/ipl/qipl.h @@ -32,7 +32,9 @@ struct QemuIplParameters { uint8_t reserved1[3]; uint64_t reserved2; uint32_t boot_menu_timeout; - uint8_t reserved3[12]; + uint8_t reserved3[2]; + uint16_t chain_len; + uint64_t next_iplb; } QEMU_PACKED; typedef struct QemuIplParameters QemuIplParameters; |