target/ppc: gdbstub init spr gdb_id for all CPUs

Make sure each CPU gets its state set up for gdb, not just the ones
before PowerPCCPUClass has had its gdb state set up.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

target/ppc/gdbstub.c

@@ -327,6 +327,25 @@ void ppc_gdb_gen_spr_xml(PowerPCCPU *cpu)
     unsigned int num_regs = 0;
     int i;
 
+    for (i = 0; i < ARRAY_SIZE(env->spr_cb); i++) {
+        ppc_spr_t *spr = &env->spr_cb[i];
+
+        if (!spr->name) {
+            continue;
+        }
+
+        /*
+         * GDB identifies registers based on the order they are
+         * presented in the XML. These ids will not match QEMU's
+         * representation (which follows the PowerISA).
+         *
+         * Store the position of the current register description so
+         * we can make the correspondence later.
+         */
+        spr->gdb_id = num_regs;
+        num_regs++;
+    }
+
     if (pcc->gdb_spr_xml) {
         return;
     }
@@ -348,17 +367,6 @@ void ppc_gdb_gen_spr_xml(PowerPCCPU *cpu)
 
         g_string_append_printf(xml, " bitsize=\"%d\"", TARGET_LONG_BITS);
         g_string_append(xml, " group=\"spr\"/>");
-
-        /*
-         * GDB identifies registers based on the order they are
-         * presented in the XML. These ids will not match QEMU's
-         * representation (which follows the PowerISA).
-         *
-         * Store the position of the current register description so
-         * we can make the correspondence later.
-         */
-        spr->gdb_id = num_regs;
-        num_regs++;
     }
 
     g_string_append(xml, "</feature>");