diff options
Diffstat (limited to 'qemu/hw/mem/pc-dimm.c')
| -rw-r--r-- | qemu/hw/mem/pc-dimm.c | 447 |
1 files changed, 0 insertions, 447 deletions
diff --git a/qemu/hw/mem/pc-dimm.c b/qemu/hw/mem/pc-dimm.c deleted file mode 100644 index 9e7de5682..000000000 --- a/qemu/hw/mem/pc-dimm.c +++ /dev/null @@ -1,447 +0,0 @@ -/* - * Dimm device for Memory Hotplug - * - * Copyright ProfitBricks GmbH 2012 - * Copyright (C) 2014 Red Hat Inc - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see <http://www.gnu.org/licenses/> - */ - -#include "qemu/osdep.h" -#include "hw/mem/pc-dimm.h" -#include "qapi/error.h" -#include "qemu/config-file.h" -#include "qapi/visitor.h" -#include "qemu/range.h" -#include "sysemu/numa.h" -#include "sysemu/kvm.h" -#include "trace.h" -#include "hw/virtio/vhost.h" - -typedef struct pc_dimms_capacity { - uint64_t size; - Error **errp; -} pc_dimms_capacity; - -void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms, - MemoryRegion *mr, uint64_t align, Error **errp) -{ - int slot; - MachineState *machine = MACHINE(qdev_get_machine()); - PCDIMMDevice *dimm = PC_DIMM(dev); - Error *local_err = NULL; - uint64_t existing_dimms_capacity = 0; - uint64_t addr; - - addr = object_property_get_int(OBJECT(dimm), PC_DIMM_ADDR_PROP, &local_err); - if (local_err) { - goto out; - } - - addr = pc_dimm_get_free_addr(hpms->base, - memory_region_size(&hpms->mr), - !addr ? NULL : &addr, align, - memory_region_size(mr), &local_err); - if (local_err) { - goto out; - } - - existing_dimms_capacity = pc_existing_dimms_capacity(&local_err); - if (local_err) { - goto out; - } - - if (existing_dimms_capacity + memory_region_size(mr) > - machine->maxram_size - machine->ram_size) { - error_setg(&local_err, "not enough space, currently 0x%" PRIx64 - " in use of total hot pluggable 0x" RAM_ADDR_FMT, - existing_dimms_capacity, - machine->maxram_size - machine->ram_size); - goto out; - } - - object_property_set_int(OBJECT(dev), addr, PC_DIMM_ADDR_PROP, &local_err); - if (local_err) { - goto out; - } - trace_mhp_pc_dimm_assigned_address(addr); - - slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP, &local_err); - if (local_err) { - goto out; - } - - slot = pc_dimm_get_free_slot(slot == PC_DIMM_UNASSIGNED_SLOT ? NULL : &slot, - machine->ram_slots, &local_err); - if (local_err) { - goto out; - } - object_property_set_int(OBJECT(dev), slot, PC_DIMM_SLOT_PROP, &local_err); - if (local_err) { - goto out; - } - trace_mhp_pc_dimm_assigned_slot(slot); - - if (kvm_enabled() && !kvm_has_free_slot(machine)) { - error_setg(&local_err, "hypervisor has no free memory slots left"); - goto out; - } - - if (!vhost_has_free_slot()) { - error_setg(&local_err, "a used vhost backend has no free" - " memory slots left"); - goto out; - } - - memory_region_add_subregion(&hpms->mr, addr - hpms->base, mr); - vmstate_register_ram(mr, dev); - numa_set_mem_node_id(addr, memory_region_size(mr), dimm->node); - -out: - error_propagate(errp, local_err); -} - -void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms, - MemoryRegion *mr) -{ - PCDIMMDevice *dimm = PC_DIMM(dev); - - numa_unset_mem_node_id(dimm->addr, memory_region_size(mr), dimm->node); - memory_region_del_subregion(&hpms->mr, mr); - vmstate_unregister_ram(mr, dev); -} - -static int pc_existing_dimms_capacity_internal(Object *obj, void *opaque) -{ - pc_dimms_capacity *cap = opaque; - uint64_t *size = &cap->size; - - if (object_dynamic_cast(obj, TYPE_PC_DIMM)) { - DeviceState *dev = DEVICE(obj); - - if (dev->realized) { - (*size) += object_property_get_int(obj, PC_DIMM_SIZE_PROP, - cap->errp); - } - - if (cap->errp && *cap->errp) { - return 1; - } - } - object_child_foreach(obj, pc_existing_dimms_capacity_internal, opaque); - return 0; -} - -uint64_t pc_existing_dimms_capacity(Error **errp) -{ - pc_dimms_capacity cap; - - cap.size = 0; - cap.errp = errp; - - pc_existing_dimms_capacity_internal(qdev_get_machine(), &cap); - return cap.size; -} - -int qmp_pc_dimm_device_list(Object *obj, void *opaque) -{ - MemoryDeviceInfoList ***prev = opaque; - - if (object_dynamic_cast(obj, TYPE_PC_DIMM)) { - DeviceState *dev = DEVICE(obj); - - if (dev->realized) { - MemoryDeviceInfoList *elem = g_new0(MemoryDeviceInfoList, 1); - MemoryDeviceInfo *info = g_new0(MemoryDeviceInfo, 1); - PCDIMMDeviceInfo *di = g_new0(PCDIMMDeviceInfo, 1); - DeviceClass *dc = DEVICE_GET_CLASS(obj); - PCDIMMDevice *dimm = PC_DIMM(obj); - - if (dev->id) { - di->has_id = true; - di->id = g_strdup(dev->id); - } - di->hotplugged = dev->hotplugged; - di->hotpluggable = dc->hotpluggable; - di->addr = dimm->addr; - di->slot = dimm->slot; - di->node = dimm->node; - di->size = object_property_get_int(OBJECT(dimm), PC_DIMM_SIZE_PROP, - NULL); - di->memdev = object_get_canonical_path(OBJECT(dimm->hostmem)); - - info->u.dimm.data = di; - elem->value = info; - elem->next = NULL; - **prev = elem; - *prev = &elem->next; - } - } - - object_child_foreach(obj, qmp_pc_dimm_device_list, opaque); - return 0; -} - -static int pc_dimm_slot2bitmap(Object *obj, void *opaque) -{ - unsigned long *bitmap = opaque; - - if (object_dynamic_cast(obj, TYPE_PC_DIMM)) { - DeviceState *dev = DEVICE(obj); - if (dev->realized) { /* count only realized DIMMs */ - PCDIMMDevice *d = PC_DIMM(obj); - set_bit(d->slot, bitmap); - } - } - - object_child_foreach(obj, pc_dimm_slot2bitmap, opaque); - return 0; -} - -int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp) -{ - unsigned long *bitmap = bitmap_new(max_slots); - int slot = 0; - - object_child_foreach(qdev_get_machine(), pc_dimm_slot2bitmap, bitmap); - - /* check if requested slot is not occupied */ - if (hint) { - if (*hint >= max_slots) { - error_setg(errp, "invalid slot# %d, should be less than %d", - *hint, max_slots); - } else if (!test_bit(*hint, bitmap)) { - slot = *hint; - } else { - error_setg(errp, "slot %d is busy", *hint); - } - goto out; - } - - /* search for free slot */ - slot = find_first_zero_bit(bitmap, max_slots); - if (slot == max_slots) { - error_setg(errp, "no free slots available"); - } -out: - g_free(bitmap); - return slot; -} - -static gint pc_dimm_addr_sort(gconstpointer a, gconstpointer b) -{ - PCDIMMDevice *x = PC_DIMM(a); - PCDIMMDevice *y = PC_DIMM(b); - Int128 diff = int128_sub(int128_make64(x->addr), int128_make64(y->addr)); - - if (int128_lt(diff, int128_zero())) { - return -1; - } else if (int128_gt(diff, int128_zero())) { - return 1; - } - return 0; -} - -static int pc_dimm_built_list(Object *obj, void *opaque) -{ - GSList **list = opaque; - - if (object_dynamic_cast(obj, TYPE_PC_DIMM)) { - DeviceState *dev = DEVICE(obj); - if (dev->realized) { /* only realized DIMMs matter */ - *list = g_slist_insert_sorted(*list, dev, pc_dimm_addr_sort); - } - } - - object_child_foreach(obj, pc_dimm_built_list, opaque); - return 0; -} - -uint64_t pc_dimm_get_free_addr(uint64_t address_space_start, - uint64_t address_space_size, - uint64_t *hint, uint64_t align, uint64_t size, - Error **errp) -{ - GSList *list = NULL, *item; - uint64_t new_addr, ret = 0; - uint64_t address_space_end = address_space_start + address_space_size; - - g_assert(QEMU_ALIGN_UP(address_space_start, align) == address_space_start); - - if (!address_space_size) { - error_setg(errp, "memory hotplug is not enabled, " - "please add maxmem option"); - goto out; - } - - if (hint && QEMU_ALIGN_UP(*hint, align) != *hint) { - error_setg(errp, "address must be aligned to 0x%" PRIx64 " bytes", - align); - goto out; - } - - if (QEMU_ALIGN_UP(size, align) != size) { - error_setg(errp, "backend memory size must be multiple of 0x%" - PRIx64, align); - goto out; - } - - assert(address_space_end > address_space_start); - object_child_foreach(qdev_get_machine(), pc_dimm_built_list, &list); - - if (hint) { - new_addr = *hint; - } else { - new_addr = address_space_start; - } - - /* find address range that will fit new DIMM */ - for (item = list; item; item = g_slist_next(item)) { - PCDIMMDevice *dimm = item->data; - uint64_t dimm_size = object_property_get_int(OBJECT(dimm), - PC_DIMM_SIZE_PROP, - errp); - if (errp && *errp) { - goto out; - } - - if (ranges_overlap(dimm->addr, dimm_size, new_addr, size)) { - if (hint) { - DeviceState *d = DEVICE(dimm); - error_setg(errp, "address range conflicts with '%s'", d->id); - goto out; - } - new_addr = QEMU_ALIGN_UP(dimm->addr + dimm_size, align); - } - } - ret = new_addr; - - if (new_addr < address_space_start) { - error_setg(errp, "can't add memory [0x%" PRIx64 ":0x%" PRIx64 - "] at 0x%" PRIx64, new_addr, size, address_space_start); - } else if ((new_addr + size) > address_space_end) { - error_setg(errp, "can't add memory [0x%" PRIx64 ":0x%" PRIx64 - "] beyond 0x%" PRIx64, new_addr, size, address_space_end); - } - -out: - g_slist_free(list); - return ret; -} - -static Property pc_dimm_properties[] = { - DEFINE_PROP_UINT64(PC_DIMM_ADDR_PROP, PCDIMMDevice, addr, 0), - DEFINE_PROP_UINT32(PC_DIMM_NODE_PROP, PCDIMMDevice, node, 0), - DEFINE_PROP_INT32(PC_DIMM_SLOT_PROP, PCDIMMDevice, slot, - PC_DIMM_UNASSIGNED_SLOT), - DEFINE_PROP_END_OF_LIST(), -}; - -static void pc_dimm_get_size(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) -{ - int64_t value; - MemoryRegion *mr; - PCDIMMDevice *dimm = PC_DIMM(obj); - - mr = host_memory_backend_get_memory(dimm->hostmem, errp); - value = memory_region_size(mr); - - visit_type_int(v, name, &value, errp); -} - -static void pc_dimm_check_memdev_is_busy(Object *obj, const char *name, - Object *val, Error **errp) -{ - MemoryRegion *mr; - Error *local_err = NULL; - - mr = host_memory_backend_get_memory(MEMORY_BACKEND(val), &local_err); - if (local_err) { - goto out; - } - if (memory_region_is_mapped(mr)) { - char *path = object_get_canonical_path_component(val); - error_setg(&local_err, "can't use already busy memdev: %s", path); - g_free(path); - } else { - qdev_prop_allow_set_link_before_realize(obj, name, val, &local_err); - } - -out: - error_propagate(errp, local_err); -} - -static void pc_dimm_init(Object *obj) -{ - PCDIMMDevice *dimm = PC_DIMM(obj); - - object_property_add(obj, PC_DIMM_SIZE_PROP, "int", pc_dimm_get_size, - NULL, NULL, NULL, &error_abort); - object_property_add_link(obj, PC_DIMM_MEMDEV_PROP, TYPE_MEMORY_BACKEND, - (Object **)&dimm->hostmem, - pc_dimm_check_memdev_is_busy, - OBJ_PROP_LINK_UNREF_ON_RELEASE, - &error_abort); -} - -static void pc_dimm_realize(DeviceState *dev, Error **errp) -{ - PCDIMMDevice *dimm = PC_DIMM(dev); - - if (!dimm->hostmem) { - error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set"); - return; - } - if (((nb_numa_nodes > 0) && (dimm->node >= nb_numa_nodes)) || - (!nb_numa_nodes && dimm->node)) { - error_setg(errp, "'DIMM property " PC_DIMM_NODE_PROP " has value %" - PRIu32 "' which exceeds the number of numa nodes: %d", - dimm->node, nb_numa_nodes ? nb_numa_nodes : 1); - return; - } -} - -static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm) -{ - return host_memory_backend_get_memory(dimm->hostmem, &error_abort); -} - -static void pc_dimm_class_init(ObjectClass *oc, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(oc); - PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc); - - dc->realize = pc_dimm_realize; - dc->props = pc_dimm_properties; - dc->desc = "DIMM memory module"; - - ddc->get_memory_region = pc_dimm_get_memory_region; -} - -static TypeInfo pc_dimm_info = { - .name = TYPE_PC_DIMM, - .parent = TYPE_DEVICE, - .instance_size = sizeof(PCDIMMDevice), - .instance_init = pc_dimm_init, - .class_init = pc_dimm_class_init, - .class_size = sizeof(PCDIMMDeviceClass), -}; - -static void pc_dimm_register_types(void) -{ - type_register_static(&pc_dimm_info); -} - -type_init(pc_dimm_register_types) |