cpu: Move cpu_index field to CPUState

Note that target-alpha accesses this field from TCG, now using a
negative offset. Therefore the field is placed last in CPUState.

Pass PowerPCCPU to [kvm]ppc_fixup_cpu() to facilitate this change.

Move common parts of mips cpu_state_reset() to mips_cpu_reset().

Acked-by: Richard Henderson <rth@twiddle.net> (for alpha)
[AF: Rebased onto ppc CPU subclasses and openpic changes]
Signed-off-by: Andreas Färber <afaerber@suse.de>
diff --git a/cpus.c b/cpus.c
index d68231a..bbb8961 100644
--- a/cpus.c
+++ b/cpus.c
@@ -390,13 +390,15 @@
 {
     va_list ap;
     CPUArchState *env;
+    CPUState *cpu;
 
     va_start(ap, fmt);
     fprintf(stderr, "qemu: hardware error: ");
     vfprintf(stderr, fmt, ap);
     fprintf(stderr, "\n");
-    for(env = first_cpu; env != NULL; env = env->next_cpu) {
-        fprintf(stderr, "CPU #%d:\n", env->cpu_index);
+    for (env = first_cpu; env != NULL; env = env->next_cpu) {
+        cpu = ENV_GET_CPU(env);
+        fprintf(stderr, "CPU #%d:\n", cpu->cpu_index);
         cpu_dump_state(env, stderr, fprintf, CPU_DUMP_FPU);
     }
     va_end(ap);
@@ -1166,7 +1168,7 @@
     for (env = first_cpu; env != NULL; env = env->next_cpu) {
         cpu = ENV_GET_CPU(env);
         for (i = 0; i < nb_numa_nodes; i++) {
-            if (test_bit(env->cpu_index, node_cpumask[i])) {
+            if (test_bit(cpu->cpu_index, node_cpumask[i])) {
                 cpu->numa_node = i;
             }
         }
@@ -1215,7 +1217,7 @@
 
         info = g_malloc0(sizeof(*info));
         info->value = g_malloc0(sizeof(*info->value));
-        info->value->CPU = env->cpu_index;
+        info->value->CPU = cpu->cpu_index;
         info->value->current = (env == first_cpu);
         info->value->halted = env->halted;
         info->value->thread_id = cpu->thread_id;
@@ -1253,6 +1255,7 @@
     FILE *f;
     uint32_t l;
     CPUArchState *env;
+    CPUState *cpu;
     uint8_t buf[1024];
 
     if (!has_cpu) {
@@ -1260,7 +1263,8 @@
     }
 
     for (env = first_cpu; env; env = env->next_cpu) {
-        if (cpu_index == env->cpu_index) {
+        cpu = ENV_GET_CPU(env);
+        if (cpu_index == cpu->cpu_index) {
             break;
         }
     }