1 /* 2 * PC DIMM device 3 * 4 * Copyright ProfitBricks GmbH 2012 5 * Copyright (C) 2013-2014 Red Hat Inc 6 * 7 * Authors: 8 * Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com> 9 * Igor Mammedov <imammedo@redhat.com> 10 * 11 * This work is licensed under the terms of the GNU GPL, version 2 or later. 12 * See the COPYING file in the top-level directory. 13 * 14 */ 15 16 #ifndef QEMU_PC_DIMM_H 17 #define QEMU_PC_DIMM_H 18 19 #include "exec/memory.h" 20 #include "sysemu/hostmem.h" 21 #include "hw/qdev.h" 22 #include "hw/boards.h" 23 24 #define TYPE_PC_DIMM "pc-dimm" 25 #define PC_DIMM(obj) \ 26 OBJECT_CHECK(PCDIMMDevice, (obj), TYPE_PC_DIMM) 27 #define PC_DIMM_CLASS(oc) \ 28 OBJECT_CLASS_CHECK(PCDIMMDeviceClass, (oc), TYPE_PC_DIMM) 29 #define PC_DIMM_GET_CLASS(obj) \ 30 OBJECT_GET_CLASS(PCDIMMDeviceClass, (obj), TYPE_PC_DIMM) 31 32 #define PC_DIMM_ADDR_PROP "addr" 33 #define PC_DIMM_SLOT_PROP "slot" 34 #define PC_DIMM_NODE_PROP "node" 35 #define PC_DIMM_SIZE_PROP "size" 36 #define PC_DIMM_MEMDEV_PROP "memdev" 37 38 #define PC_DIMM_UNASSIGNED_SLOT -1 39 40 /** 41 * PCDIMMDevice: 42 * @addr: starting guest physical address, where @PCDIMMDevice is mapped. 43 * Default value: 0, means that address is auto-allocated. 44 * @node: numa node to which @PCDIMMDevice is attached. 45 * @slot: slot number into which @PCDIMMDevice is plugged in. 46 * Default value: -1, means that slot is auto-allocated. 47 * @hostmem: host memory backend providing memory for @PCDIMMDevice 48 */ 49 typedef struct PCDIMMDevice { 50 /* private */ 51 DeviceState parent_obj; 52 53 /* public */ 54 uint64_t addr; 55 uint32_t node; 56 int32_t slot; 57 HostMemoryBackend *hostmem; 58 } PCDIMMDevice; 59 60 /** 61 * PCDIMMDeviceClass: 62 * @realize: called after common dimm is realized so that the dimm based 63 * devices get the chance to do specified operations. 64 * @get_memory_region: returns #MemoryRegion associated with @dimm which 65 * is directly mapped into the physical address space of guest. Will not 66 * fail after the device was realized. 67 * @get_vmstate_memory_region: returns #MemoryRegion which indicates the 68 * memory of @dimm should be kept during live migration. Will not fail 69 * after the device was realized. 70 */ 71 typedef struct PCDIMMDeviceClass { 72 /* private */ 73 DeviceClass parent_class; 74 75 /* public */ 76 void (*realize)(PCDIMMDevice *dimm, Error **errp); 77 MemoryRegion *(*get_memory_region)(PCDIMMDevice *dimm, Error **errp); 78 MemoryRegion *(*get_vmstate_memory_region)(PCDIMMDevice *dimm, 79 Error **errp); 80 } PCDIMMDeviceClass; 81 82 void pc_dimm_pre_plug(DeviceState *dev, MachineState *machine, 83 const uint64_t *legacy_align, Error **errp); 84 void pc_dimm_plug(DeviceState *dev, MachineState *machine, Error **errp); 85 void pc_dimm_unplug(DeviceState *dev, MachineState *machine); 86 #endif 87