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machine: make MemoryHotplugState accessible via the machine

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Let's allow to query the MemoryHotplugState directly from the machine.
If the pointer is NULL, the machine does not support memory devices. If
the pointer is !NULL, the machine supports memory devices and the
data structure contains information about the applicable physical
guest address space region.

This allows us to generically detect if a certain machine has support
for memory devices, and to generically manage it (find free address
range, plug/unplug a memory region).

We will rename "MemoryHotplugState" to something more meaningful
("DeviceMemory") after we completed factoring out the pc-dimm code into
MemoryDevice code.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180423165126.15441-3-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
[ehabkost: rebased series, solved conflicts at spapr.c]
[ehabkost: squashed fix to use g_malloc0()]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
David Hildenbrand 2018-04-23 18:51:17 +02:00 • committed by Eduardo Habkost
parent 2cc0e2e814
commit b0c14ec4ef
9 changed files with 60 additions and 50 deletions
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1
include/hw/ppc/spapr.h
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@ -162,7 +162,6 @@ struct sPAPRMachineState {
/*< public >*/
char *kvm_type;
MemoryHotplugState hotplug_memory;
const char *icp_type;