hw/intc/loongarch_ipi: Get cpu number from possible_cpu_arch_ids

Supported CPU number can be acquired from function
possible_cpu_arch_ids(), cpu-num property is not necessary and can
be removed.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Bibo Mao <maobibo@loongson.cn>

hw/intc/loongarch_ipi.c

@@ -55,6 +55,9 @@ static void loongarch_ipi_realize(DeviceState *dev, Error **errp)
 {
     LoongsonIPICommonState *lics = LOONGSON_IPI_COMMON(dev);
     LoongarchIPIClass *lic = LOONGARCH_IPI_GET_CLASS(dev);
+    MachineState *machine = MACHINE(qdev_get_machine());
+    MachineClass *mc = MACHINE_GET_CLASS(machine);
+    const CPUArchIdList *id_list;
     Error *local_err = NULL;
     int i;
 
@@ -64,13 +67,13 @@ static void loongarch_ipi_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    if (lics->num_cpu == 0) {
-        error_setg(errp, "num-cpu must be at least 1");
-        return;
-    }
-
+    assert(mc->possible_cpu_arch_ids);
+    id_list = mc->possible_cpu_arch_ids(machine);
+    lics->num_cpu = id_list->len;
     lics->cpu = g_new0(IPICore, lics->num_cpu);
     for (i = 0; i < lics->num_cpu; i++) {
+        lics->cpu[i].arch_id = id_list->cpus[i].arch_id;
+        lics->cpu[i].cpu = CPU(id_list->cpus[i].cpu);
         lics->cpu[i].ipi = lics;
         qdev_init_gpio_out(dev, &lics->cpu[i].irq, 1);
     }

include/hw/intc/loongson_ipi_common.h

@@ -27,6 +27,8 @@ typedef struct IPICore {
     /* 64bit buf divide into 2 32-bit buf */
     uint32_t buf[IPI_MBX_NUM * 2];
     qemu_irq irq;
+    uint64_t arch_id;
+    CPUState *cpu;
 } IPICore;
 
 struct LoongsonIPICommonState {