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pc-dimm: move actual plug/unplug of a memory region to MemoryDevice

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Registering the memory region for migration has do be done by the owner.
There could be cases, where we don't want to migrate the memory.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180423165126.15441-8-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
David Hildenbrand 2018-04-23 18:51:22 +02:00 committed by Eduardo Habkost
parent 1b6d6af21b
commit 18d11dc910
3 changed files with 23 additions and 3 deletions

18
hw/mem/memory-device.c

@ -243,6 +243,24 @@ uint64_t get_plugged_memory_size(void)
return size;
}
void memory_device_plug_region(MachineState *ms, MemoryRegion *mr,
uint64_t addr)
{
/* we expect a previous call to memory_device_get_free_addr() */
g_assert(ms->device_memory);
memory_region_add_subregion(&ms->device_memory->mr,
addr - ms->device_memory->base, mr);
}
void memory_device_unplug_region(MachineState *ms, MemoryRegion *mr)
{
/* we expect a previous call to memory_device_get_free_addr() */
g_assert(ms->device_memory);
memory_region_del_subregion(&ms->device_memory->mr, mr);
}
static const TypeInfo memory_device_info = {
.name = TYPE_MEMORY_DEVICE,
.parent = TYPE_INTERFACE,

5
hw/mem/pc-dimm.c

@ -36,7 +36,6 @@ void pc_dimm_memory_plug(DeviceState *dev, MachineState *machine,
uint64_t align, Error **errp)
{
int slot;
MemoryHotplugState *hpms = machine->device_memory;
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm);
@ -83,7 +82,7 @@ void pc_dimm_memory_plug(DeviceState *dev, MachineState *machine,
}
trace_mhp_pc_dimm_assigned_slot(slot);
memory_region_add_subregion(&hpms->mr, addr - hpms->base, mr);
memory_device_plug_region(machine, mr, addr);
vmstate_register_ram(vmstate_mr, dev);
out:
@ -97,7 +96,7 @@ void pc_dimm_memory_unplug(DeviceState *dev, MachineState *machine)
MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm);
MemoryRegion *mr = ddc->get_memory_region(dimm, &error_abort);
memory_region_del_subregion(&machine->device_memory->mr, mr);
memory_device_unplug_region(machine, mr);
vmstate_unregister_ram(vmstate_mr, dev);
}

3
include/hw/mem/memory-device.h

@ -44,5 +44,8 @@ uint64_t get_plugged_memory_size(void);
uint64_t memory_device_get_free_addr(MachineState *ms, const uint64_t *hint,
uint64_t align, uint64_t size,
Error **errp);
void memory_device_plug_region(MachineState *ms, MemoryRegion *mr,
uint64_t addr);
void memory_device_unplug_region(MachineState *ms, MemoryRegion *mr);
#endif