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 23 #define TYPE_PC_DIMM "pc-dimm" 24 #define PC_DIMM(obj) \ 25 OBJECT_CHECK(PCDIMMDevice, (obj), TYPE_PC_DIMM) 26 #define PC_DIMM_CLASS(oc) \ 27 OBJECT_CLASS_CHECK(PCDIMMDeviceClass, (oc), TYPE_PC_DIMM) 28 #define PC_DIMM_GET_CLASS(obj) \ 29 OBJECT_GET_CLASS(PCDIMMDeviceClass, (obj), TYPE_PC_DIMM) 30 31 #define PC_DIMM_ADDR_PROP "addr" 32 #define PC_DIMM_SLOT_PROP "slot" 33 #define PC_DIMM_NODE_PROP "node" 34 #define PC_DIMM_SIZE_PROP "size" 35 #define PC_DIMM_MEMDEV_PROP "memdev" 36 37 #define PC_DIMM_UNASSIGNED_SLOT -1 38 39 /** 40 * PCDIMMDevice: 41 * @addr: starting guest physical address, where @PCDIMMDevice is mapped. 42 * Default value: 0, means that address is auto-allocated. 43 * @node: numa node to which @PCDIMMDevice is attached. 44 * @slot: slot number into which @PCDIMMDevice is plugged in. 45 * Default value: -1, means that slot is auto-allocated. 46 * @hostmem: host memory backend providing memory for @PCDIMMDevice 47 */ 48 typedef struct PCDIMMDevice { 49 /* private */ 50 DeviceState parent_obj; 51 52 /* public */ 53 uint64_t addr; 54 uint32_t node; 55 int32_t slot; 56 HostMemoryBackend *hostmem; 57 } PCDIMMDevice; 58 59 /** 60 * PCDIMMDeviceClass: 61 * @realize: called after common dimm is realized so that the dimm based 62 * devices get the chance to do specified operations. 63 * @get_memory_region: returns #MemoryRegion associated with @dimm which 64 * is directly mapped into the physical address space of guest. 65 * @get_vmstate_memory_region: returns #MemoryRegion which indicates the 66 * memory of @dimm should be kept during live migration. 67 */ 68 typedef struct PCDIMMDeviceClass { 69 /* private */ 70 DeviceClass parent_class; 71 72 /* public */ 73 void (*realize)(PCDIMMDevice *dimm, Error **errp); 74 MemoryRegion *(*get_memory_region)(PCDIMMDevice *dimm); 75 MemoryRegion *(*get_vmstate_memory_region)(PCDIMMDevice *dimm); 76 } PCDIMMDeviceClass; 77 78 /** 79 * MemoryHotplugState: 80 * @base: address in guest physical address space where hotplug memory 81 * address space begins. 82 * @mr: hotplug memory address space container 83 */ 84 typedef struct MemoryHotplugState { 85 hwaddr base; 86 MemoryRegion mr; 87 } MemoryHotplugState; 88 89 uint64_t pc_dimm_get_free_addr(uint64_t address_space_start, 90 uint64_t address_space_size, 91 uint64_t *hint, uint64_t align, uint64_t size, 92 Error **errp); 93 94 int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp); 95 96 int qmp_pc_dimm_device_list(Object *obj, void *opaque); 97 uint64_t pc_existing_dimms_capacity(Error **errp); 98 void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms, 99 MemoryRegion *mr, uint64_t align, Error **errp); 100 void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms, 101 MemoryRegion *mr); 102 #endif 103