numa,pc-dimm: Store pc-dimm memory information in numa_info

Start storing the (start_addr, end_addr) of the pc-dimm memory
in corresponding numa_info[node] so that this information can be used
to lookup node by address.

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Tested-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

hw/mem/pc-dimm.c

@@ -97,6 +97,7 @@ void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms,
 
     memory_region_add_subregion(&hpms->mr, addr - hpms->base, mr);
     vmstate_register_ram(mr, dev);
+    numa_set_mem_node_id(addr, memory_region_size(mr), dimm->node);
 
 out:
     error_propagate(errp, local_err);
@@ -105,6 +106,9 @@ out:
 void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms,
                            MemoryRegion *mr)
 {
+    PCDIMMDevice *dimm = PC_DIMM(dev);
+
+    numa_unset_mem_node_id(dimm->addr, memory_region_size(mr), dimm->node);
     memory_region_del_subregion(&hpms->mr, mr);
     vmstate_unregister_ram(mr, dev);
 }

include/sysemu/numa.h

@@ -10,16 +10,26 @@
 
 extern int nb_numa_nodes;   /* Number of NUMA nodes */
 
+struct numa_addr_range {
+    ram_addr_t mem_start;
+    ram_addr_t mem_end;
+    QLIST_ENTRY(numa_addr_range) entry;
+};
+
 typedef struct node_info {
     uint64_t node_mem;
     DECLARE_BITMAP(node_cpu, MAX_CPUMASK_BITS);
     struct HostMemoryBackend *node_memdev;
     bool present;
+    QLIST_HEAD(, numa_addr_range) addr; /* List to store address ranges */
 } NodeInfo;
+
 extern NodeInfo numa_info[MAX_NODES];
 void parse_numa_opts(MachineClass *mc);
 void numa_post_machine_init(void);
 void query_numa_node_mem(uint64_t node_mem[]);
 extern QemuOptsList qemu_numa_opts;
+void numa_set_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node);
+void numa_unset_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node);
 
 #endif

numa.c

@@ -52,6 +52,28 @@ static int max_numa_nodeid; /* Highest specified NUMA node ID, plus one.
 int nb_numa_nodes;
 NodeInfo numa_info[MAX_NODES];
 
+void numa_set_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node)
+{
+    struct numa_addr_range *range = g_malloc0(sizeof(*range));
+
+    range->mem_start = addr;
+    range->mem_end = addr + size - 1;
+    QLIST_INSERT_HEAD(&numa_info[node].addr, range, entry);
+}
+
+void numa_unset_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node)
+{
+    struct numa_addr_range *range, *next;
+
+    QLIST_FOREACH_SAFE(range, &numa_info[node].addr, entry, next) {
+        if (addr == range->mem_start && (addr + size - 1) == range->mem_end) {
+            QLIST_REMOVE(range, entry);
+            g_free(range);
+            return;
+        }
+    }
+}
+
 static void numa_node_parse(NumaNodeOptions *node, QemuOpts *opts, Error **errp)
 {
     uint16_t nodenr;
@@ -273,6 +295,10 @@ void parse_numa_opts(MachineClass *mc)
             exit(1);
         }
 
+        for (i = 0; i < nb_numa_nodes; i++) {
+            QLIST_INIT(&numa_info[i].addr);
+        }
+
         for (i = 0; i < nb_numa_nodes; i++) {
             if (!bitmap_empty(numa_info[i].node_cpu, MAX_CPUMASK_BITS)) {
                 break;