spapr: Fix ibm,lrdr-capacity

ibm,lrdr-capacity has a field to describe the maximum address in bytes
and therefore, the most memory that can be allocated to this guest. We
are using maxmem for this field, but instead should use the actual RAM
address corresponding to the end of hotplug region.
Signed-off-by: NBharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

hw/ppc/spapr_rtas.c

@@ -684,6 +684,9 @@ int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
     int i;
     uint32_t lrdr_capacity[5];
     MachineState *machine = MACHINE(qdev_get_machine());
+    sPAPRMachineState *spapr = SPAPR_MACHINE(machine);
+    uint64_t max_hotplug_addr = spapr->hotplug_memory.base +
+                                memory_region_size(&spapr->hotplug_memory.mr);
 
     ret = fdt_add_mem_rsv(fdt, rtas_addr, rtas_size);
     if (ret < 0) {
@@ -733,8 +736,8 @@ int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr,
 
     }
 
-    lrdr_capacity[0] = cpu_to_be32(((uint64_t)machine->maxram_size) >> 32);
-    lrdr_capacity[1] = cpu_to_be32(machine->maxram_size & 0xffffffff);
+    lrdr_capacity[0] = cpu_to_be32(max_hotplug_addr >> 32);
+    lrdr_capacity[1] = cpu_to_be32(max_hotplug_addr & 0xffffffff);
     lrdr_capacity[2] = 0;
     lrdr_capacity[3] = cpu_to_be32(SPAPR_MEMORY_BLOCK_SIZE);
     lrdr_capacity[4] = cpu_to_be32(max_cpus/smp_threads);