diff options
Diffstat (limited to 'hw/s390x')
| -rw-r--r-- | hw/s390x/sclp.c | 310 |
1 files changed, 5 insertions, 305 deletions
diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c index 276972b..047d577 100644 --- a/hw/s390x/sclp.c +++ b/hw/s390x/sclp.c @@ -15,9 +15,7 @@ #include "qemu/osdep.h" #include "qapi/error.h" #include "cpu.h" -#include "exec/memory.h" #include "sysemu/sysemu.h" -#include "exec/address-spaces.h" #include "hw/boards.h" #include "hw/s390x/sclp.h" #include "hw/s390x/event-facility.h" @@ -57,10 +55,8 @@ static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb) { ReadInfo *read_info = (ReadInfo *) sccb; MachineState *machine = MACHINE(qdev_get_machine()); - sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev(); int cpu_count; int rnsize, rnmax; - int slots = MIN(machine->ram_slots, s390_get_memslot_count()); IplParameterBlock *ipib = s390_ipl_get_iplb(); /* CPU information */ @@ -80,36 +76,6 @@ static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb) read_info->facilities = cpu_to_be64(SCLP_HAS_CPU_INFO | SCLP_HAS_IOA_RECONFIG); - /* Memory Hotplug is only supported for the ccw machine type */ - if (mhd) { - mhd->standby_subregion_size = MEM_SECTION_SIZE; - /* Deduct the memory slot already used for core */ - if (slots > 0) { - while ((mhd->standby_subregion_size * (slots - 1) - < mhd->standby_mem_size)) { - mhd->standby_subregion_size = mhd->standby_subregion_size << 1; - } - } - /* - * Initialize mapping of guest standby memory sections indicating which - * are and are not online. Assume all standby memory begins offline. - */ - if (mhd->standby_state_map == 0) { - if (mhd->standby_mem_size % mhd->standby_subregion_size) { - mhd->standby_state_map = g_malloc0((mhd->standby_mem_size / - mhd->standby_subregion_size + 1) * - (mhd->standby_subregion_size / - MEM_SECTION_SIZE)); - } else { - mhd->standby_state_map = g_malloc0(mhd->standby_mem_size / - MEM_SECTION_SIZE); - } - } - mhd->padded_ram_size = ram_size + mhd->pad_size; - mhd->rzm = 1 << mhd->increment_size; - - read_info->facilities |= cpu_to_be64(SCLP_FC_ASSIGN_ATTACH_READ_STOR); - } read_info->mha_pow = s390_get_mha_pow(); read_info->hmfai = cpu_to_be32(s390_get_hmfai()); @@ -121,7 +87,8 @@ static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb) read_info->rnsize2 = cpu_to_be32(rnsize); } - rnmax = machine->maxram_size >> sclp->increment_size; + /* we don't support standby memory, maxram_size is never exposed */ + rnmax = machine->ram_size >> sclp->increment_size; if (rnmax < 0x10000) { read_info->rnmax = cpu_to_be16(rnmax); } else { @@ -139,195 +106,6 @@ static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb) sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION); } -static void read_storage_element0_info(SCLPDevice *sclp, SCCB *sccb) -{ - int i, assigned; - int subincrement_id = SCLP_STARTING_SUBINCREMENT_ID; - ReadStorageElementInfo *storage_info = (ReadStorageElementInfo *) sccb; - sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev(); - - if (!mhd) { - sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND); - return; - } - - if ((ram_size >> mhd->increment_size) >= 0x10000) { - sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION); - return; - } - - /* Return information regarding core memory */ - storage_info->max_id = cpu_to_be16(mhd->standby_mem_size ? 1 : 0); - assigned = ram_size >> mhd->increment_size; - storage_info->assigned = cpu_to_be16(assigned); - - for (i = 0; i < assigned; i++) { - storage_info->entries[i] = cpu_to_be32(subincrement_id); - subincrement_id += SCLP_INCREMENT_UNIT; - } - sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION); -} - -static void read_storage_element1_info(SCLPDevice *sclp, SCCB *sccb) -{ - ReadStorageElementInfo *storage_info = (ReadStorageElementInfo *) sccb; - sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev(); - - if (!mhd) { - sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND); - return; - } - - if ((mhd->standby_mem_size >> mhd->increment_size) >= 0x10000) { - sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION); - return; - } - - /* Return information regarding standby memory */ - storage_info->max_id = cpu_to_be16(mhd->standby_mem_size ? 1 : 0); - storage_info->assigned = cpu_to_be16(mhd->standby_mem_size >> - mhd->increment_size); - storage_info->standby = cpu_to_be16(mhd->standby_mem_size >> - mhd->increment_size); - sccb->h.response_code = cpu_to_be16(SCLP_RC_STANDBY_READ_COMPLETION); -} - -static void attach_storage_element(SCLPDevice *sclp, SCCB *sccb, - uint16_t element) -{ - int i, assigned, subincrement_id; - AttachStorageElement *attach_info = (AttachStorageElement *) sccb; - sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev(); - - if (!mhd) { - sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND); - return; - } - - if (element != 1) { - sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND); - return; - } - - assigned = mhd->standby_mem_size >> mhd->increment_size; - attach_info->assigned = cpu_to_be16(assigned); - subincrement_id = ((ram_size >> mhd->increment_size) << 16) - + SCLP_STARTING_SUBINCREMENT_ID; - for (i = 0; i < assigned; i++) { - attach_info->entries[i] = cpu_to_be32(subincrement_id); - subincrement_id += SCLP_INCREMENT_UNIT; - } - sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION); -} - -static void assign_storage(SCLPDevice *sclp, SCCB *sccb) -{ - MemoryRegion *mr = NULL; - uint64_t this_subregion_size; - AssignStorage *assign_info = (AssignStorage *) sccb; - sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev(); - ram_addr_t assign_addr; - MemoryRegion *sysmem = get_system_memory(); - - if (!mhd) { - sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND); - return; - } - assign_addr = (be16_to_cpu(assign_info->rn) - 1) * mhd->rzm; - - if ((assign_addr % MEM_SECTION_SIZE == 0) && - (assign_addr >= mhd->padded_ram_size)) { - /* Re-use existing memory region if found */ - mr = memory_region_find(sysmem, assign_addr, 1).mr; - memory_region_unref(mr); - if (!mr) { - - MemoryRegion *standby_ram = g_new(MemoryRegion, 1); - - /* offset to align to standby_subregion_size for allocation */ - ram_addr_t offset = assign_addr - - (assign_addr - mhd->padded_ram_size) - % mhd->standby_subregion_size; - - /* strlen("standby.ram") + 4 (Max of KVM_MEMORY_SLOTS) + NULL */ - char id[16]; - snprintf(id, 16, "standby.ram%d", - (int)((offset - mhd->padded_ram_size) / - mhd->standby_subregion_size) + 1); - - /* Allocate a subregion of the calculated standby_subregion_size */ - if (offset + mhd->standby_subregion_size > - mhd->padded_ram_size + mhd->standby_mem_size) { - this_subregion_size = mhd->padded_ram_size + - mhd->standby_mem_size - offset; - } else { - this_subregion_size = mhd->standby_subregion_size; - } - - memory_region_init_ram(standby_ram, NULL, id, this_subregion_size, - &error_fatal); - /* This is a hack to make memory hotunplug work again. Once we have - * subdevices, we have to unparent them when unassigning memory, - * instead of doing it via the ref count of the MemoryRegion. */ - object_ref(OBJECT(standby_ram)); - object_unparent(OBJECT(standby_ram)); - memory_region_add_subregion(sysmem, offset, standby_ram); - } - /* The specified subregion is no longer in standby */ - mhd->standby_state_map[(assign_addr - mhd->padded_ram_size) - / MEM_SECTION_SIZE] = 1; - } - sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION); -} - -static void unassign_storage(SCLPDevice *sclp, SCCB *sccb) -{ - MemoryRegion *mr = NULL; - AssignStorage *assign_info = (AssignStorage *) sccb; - sclpMemoryHotplugDev *mhd = get_sclp_memory_hotplug_dev(); - ram_addr_t unassign_addr; - MemoryRegion *sysmem = get_system_memory(); - - if (!mhd) { - sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND); - return; - } - unassign_addr = (be16_to_cpu(assign_info->rn) - 1) * mhd->rzm; - - /* if the addr is a multiple of 256 MB */ - if ((unassign_addr % MEM_SECTION_SIZE == 0) && - (unassign_addr >= mhd->padded_ram_size)) { - mhd->standby_state_map[(unassign_addr - - mhd->padded_ram_size) / MEM_SECTION_SIZE] = 0; - - /* find the specified memory region and destroy it */ - mr = memory_region_find(sysmem, unassign_addr, 1).mr; - memory_region_unref(mr); - if (mr) { - int i; - int is_removable = 1; - ram_addr_t map_offset = (unassign_addr - mhd->padded_ram_size - - (unassign_addr - mhd->padded_ram_size) - % mhd->standby_subregion_size); - /* Mark all affected subregions as 'standby' once again */ - for (i = 0; - i < (mhd->standby_subregion_size / MEM_SECTION_SIZE); - i++) { - - if (mhd->standby_state_map[i + map_offset / MEM_SECTION_SIZE]) { - is_removable = 0; - break; - } - } - if (is_removable) { - memory_region_del_subregion(sysmem, mr); - object_unref(OBJECT(mr)); - } - } - } - sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_COMPLETION); -} - /* Provide information about the CPU */ static void sclp_read_cpu_info(SCLPDevice *sclp, SCCB *sccb) { @@ -390,22 +168,6 @@ static void sclp_execute(SCLPDevice *sclp, SCCB *sccb, uint32_t code) case SCLP_CMDW_READ_CPU_INFO: sclp_c->read_cpu_info(sclp, sccb); break; - case SCLP_READ_STORAGE_ELEMENT_INFO: - if (code & 0xff00) { - sclp_c->read_storage_element1_info(sclp, sccb); - } else { - sclp_c->read_storage_element0_info(sclp, sccb); - } - break; - case SCLP_ATTACH_STORAGE_ELEMENT: - sclp_c->attach_storage_element(sclp, sccb, (code & 0xff00) >> 8); - break; - case SCLP_ASSIGN_STORAGE: - sclp_c->assign_storage(sclp, sccb); - break; - case SCLP_UNASSIGN_STORAGE: - sclp_c->unassign_storage(sclp, sccb); - break; case SCLP_CMDW_CONFIGURE_IOA: sclp_configure_io_adapter(sclp, sccb, true); break; @@ -540,9 +302,6 @@ static void sclp_memory_init(SCLPDevice *sclp) { MachineState *machine = MACHINE(qdev_get_machine()); ram_addr_t initial_mem = machine->ram_size; - ram_addr_t max_mem = machine->maxram_size; - ram_addr_t standby_mem = max_mem - initial_mem; - ram_addr_t pad_mem = 0; int increment_size = 20; /* The storage increment size is a multiple of 1M and is a power of 2. @@ -552,34 +311,14 @@ static void sclp_memory_init(SCLPDevice *sclp) while ((initial_mem >> increment_size) > MAX_STORAGE_INCREMENTS) { increment_size++; } - if (machine->ram_slots) { - while ((standby_mem >> increment_size) > MAX_STORAGE_INCREMENTS) { - increment_size++; - } - } sclp->increment_size = increment_size; - /* The core and standby memory areas need to be aligned with - * the increment size. In effect, this can cause the - * user-specified memory size to be rounded down to align - * with the nearest increment boundary. */ + /* The core memory area needs to be aligned with the increment size. + * In effect, this can cause the user-specified memory size to be rounded + * down to align with the nearest increment boundary. */ initial_mem = initial_mem >> increment_size << increment_size; - standby_mem = standby_mem >> increment_size << increment_size; - - /* If the size of ram is not on a MEM_SECTION_SIZE boundary, - calculate the pad size necessary to force this boundary. */ - if (machine->ram_slots && standby_mem) { - sclpMemoryHotplugDev *mhd = init_sclp_memory_hotplug_dev(); - if (initial_mem % MEM_SECTION_SIZE) { - pad_mem = MEM_SECTION_SIZE - initial_mem % MEM_SECTION_SIZE; - } - mhd->increment_size = increment_size; - mhd->pad_size = pad_mem; - mhd->standby_mem_size = standby_mem; - } machine->ram_size = initial_mem; - machine->maxram_size = initial_mem + pad_mem + standby_mem; /* let's propagate the changed ram size into the global variable. */ ram_size = initial_mem; } @@ -613,11 +352,6 @@ static void sclp_class_init(ObjectClass *oc, void *data) dc->user_creatable = false; sc->read_SCP_info = read_SCP_info; - sc->read_storage_element0_info = read_storage_element0_info; - sc->read_storage_element1_info = read_storage_element1_info; - sc->attach_storage_element = attach_storage_element; - sc->assign_storage = assign_storage; - sc->unassign_storage = unassign_storage; sc->read_cpu_info = sclp_read_cpu_info; sc->execute = sclp_execute; sc->service_interrupt = service_interrupt; @@ -632,42 +366,8 @@ static TypeInfo sclp_info = { .class_size = sizeof(SCLPDeviceClass), }; -sclpMemoryHotplugDev *init_sclp_memory_hotplug_dev(void) -{ - DeviceState *dev; - dev = qdev_create(NULL, TYPE_SCLP_MEMORY_HOTPLUG_DEV); - object_property_add_child(qdev_get_machine(), - TYPE_SCLP_MEMORY_HOTPLUG_DEV, - OBJECT(dev), NULL); - qdev_init_nofail(dev); - return SCLP_MEMORY_HOTPLUG_DEV(object_resolve_path( - TYPE_SCLP_MEMORY_HOTPLUG_DEV, NULL)); -} - -sclpMemoryHotplugDev *get_sclp_memory_hotplug_dev(void) -{ - return SCLP_MEMORY_HOTPLUG_DEV(object_resolve_path( - TYPE_SCLP_MEMORY_HOTPLUG_DEV, NULL)); -} - -static void sclp_memory_hotplug_dev_class_init(ObjectClass *klass, - void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - - set_bit(DEVICE_CATEGORY_MISC, dc->categories); -} - -static TypeInfo sclp_memory_hotplug_dev_info = { - .name = TYPE_SCLP_MEMORY_HOTPLUG_DEV, - .parent = TYPE_SYS_BUS_DEVICE, - .instance_size = sizeof(sclpMemoryHotplugDev), - .class_init = sclp_memory_hotplug_dev_class_init, -}; - static void register_types(void) { - type_register_static(&sclp_memory_hotplug_dev_info); type_register_static(&sclp_info); } type_init(register_types); |