hw/loongarch/virt: Improve fdt table creation for CPU object

For CPU object, possible_cpu_arch_ids() function is used rather than
smp.cpus. With command -smp x, -device la464-loongarch-cpu, smp.cpus
is not accurate for all possible CPU objects, possible_cpu_arch_ids()
is used here.

Signed-off-by: Bibo Mao <[email protected]>
Reviewed-by: Bibo Mao <[email protected]>

Author: bibo-mao

hw/loongarch/virt.c

@@ -365,26 +365,35 @@ static void create_fdt(LoongArchVirtMachineState *lvms)
 static void fdt_add_cpu_nodes(const LoongArchVirtMachineState *lvms)
 {
     int num;
-    const MachineState *ms = MACHINE(lvms);
-    int smp_cpus = ms->smp.cpus;
+    MachineState *ms = MACHINE(lvms);
+    MachineClass *mc = MACHINE_GET_CLASS(ms);
+    const CPUArchIdList *possible_cpus;
+    LoongArchCPU *cpu;
+    CPUState *cs;
+    char *nodename, *map_path;
 
     qemu_fdt_add_subnode(ms->fdt, "/cpus");
     qemu_fdt_setprop_cell(ms->fdt, "/cpus", "#address-cells", 0x1);
     qemu_fdt_setprop_cell(ms->fdt, "/cpus", "#size-cells", 0x0);
 
     /* cpu nodes */
-    for (num = smp_cpus - 1; num >= 0; num--) {
-        char *nodename = g_strdup_printf("/cpus/cpu@%d", num);
-        LoongArchCPU *cpu = LOONGARCH_CPU(qemu_get_cpu(num));
-        CPUState *cs = CPU(cpu);
+    possible_cpus = mc->possible_cpu_arch_ids(ms);
+    for (num = 0; num < possible_cpus->len; num++) {
+        cs = possible_cpus->cpus[num].cpu;
+        if (cs == NULL) {
+            continue;
+        }
+
+        nodename = g_strdup_printf("/cpus/cpu@%d", num);
+        cpu = LOONGARCH_CPU(cs);
 
         qemu_fdt_add_subnode(ms->fdt, nodename);
         qemu_fdt_setprop_string(ms->fdt, nodename, "device_type", "cpu");
         qemu_fdt_setprop_string(ms->fdt, nodename, "compatible",
                                 cpu->dtb_compatible);
-        if (ms->possible_cpus->cpus[cs->cpu_index].props.has_node_id) {
+        if (possible_cpus->cpus[num].props.has_node_id) {
             qemu_fdt_setprop_cell(ms->fdt, nodename, "numa-node-id",
-                ms->possible_cpus->cpus[cs->cpu_index].props.node_id);
+                possible_cpus->cpus[num].props.node_id);
         }
         qemu_fdt_setprop_cell(ms->fdt, nodename, "reg", num);
         qemu_fdt_setprop_cell(ms->fdt, nodename, "phandle",
@@ -394,11 +403,13 @@ static void fdt_add_cpu_nodes(const LoongArchVirtMachineState *lvms)
 
     /*cpu map */
     qemu_fdt_add_subnode(ms->fdt, "/cpus/cpu-map");
+    for (num = 0; num < possible_cpus->len; num++) {
+        cs = possible_cpus->cpus[num].cpu;
+        if (cs == NULL) {
+            continue;
+        }
 
-    for (num = smp_cpus - 1; num >= 0; num--) {
-        char *cpu_path = g_strdup_printf("/cpus/cpu@%d", num);
-        char *map_path;
-
+        nodename = g_strdup_printf("/cpus/cpu@%d", num);
         if (ms->smp.threads > 1) {
             map_path = g_strdup_printf(
                 "/cpus/cpu-map/socket%d/core%d/thread%d",
@@ -412,10 +423,10 @@ static void fdt_add_cpu_nodes(const LoongArchVirtMachineState *lvms)
                 num % ms->smp.cores);
         }
         qemu_fdt_add_path(ms->fdt, map_path);
-        qemu_fdt_setprop_phandle(ms->fdt, map_path, "cpu", cpu_path);
+        qemu_fdt_setprop_phandle(ms->fdt, map_path, "cpu", nodename);
 
         g_free(map_path);
-        g_free(cpu_path);
+        g_free(nodename);
     }
 }