S390: Enable -cpu help and QMP query-cpu-definitions

This enables qemu -cpu help to return a list of supported CPU models
on s390 and also to query for cpu definitions in the monitor.
Initially only cpu model = host is returned. This needs to be reworked
into a full-fledged CPU model handling later on.
This change is needed to allow libvirt exploiters (like OpenStack)
to specify a CPU model.

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
[agraf: fix s390x-linux-user, adjust header locations]
Signed-off-by: Alexander Graf <agraf@suse.de>

hw/s390-virtio.c

@@ -2,6 +2,7 @@
  * QEMU S390 virtio target
  *
  * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
+ * Copyright IBM Corp 2012
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -13,7 +14,10 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU Lesser General Public
+ * Contributions after 2012-10-29 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ *
+ * You should have received a copy of the GNU (Lesser) General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
 

target-s390x/cpu.c

@@ -23,7 +23,33 @@
 #include "cpu.h"
 #include "qemu-common.h"
 #include "qemu/timer.h"
+#ifndef CONFIG_USER_ONLY
+#include "sysemu/arch_init.h"
+#endif
+
+/* generate CPU information for cpu -? */
+void s390_cpu_list(FILE *f, fprintf_function cpu_fprintf)
+{
+#ifdef CONFIG_KVM
+    (*cpu_fprintf)(f, "s390 %16s\n", "host");
+#endif
+}
 
+#ifndef CONFIG_USER_ONLY
+CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
+{
+    CpuDefinitionInfoList *entry;
+    CpuDefinitionInfo *info;
+
+    info = g_malloc0(sizeof(*info));
+    info->name = g_strdup("host");
+
+    entry = g_malloc0(sizeof(*entry));
+    entry->value = info;
+
+    return entry;
+}
+#endif
 
 /* CPUClass::reset() */
 static void s390_cpu_reset(CPUState *s)

target-s390x/cpu.h

@@ -362,6 +362,9 @@ static inline void cpu_set_tls(CPUS390XState *env, target_ulong newtls)
 #define cpu_gen_code cpu_s390x_gen_code
 #define cpu_signal_handler cpu_s390x_signal_handler
 
+void s390_cpu_list(FILE *f, fprintf_function cpu_fprintf);
+#define cpu_list s390_cpu_list
+
 #include "exec/exec-all.h"
 
 #define EXCP_EXT 1 /* external interrupt */