Add PPC cpu driver.

To add support for running libvirt on PowerPC, a CPU driver for the
PowerPC platform must be added.
Most generic cpu driver routines such as CPU compare, decode, etc
are based on CPUID comparison and are not relevant for non-x86
platforms.
Here, we introduce stubs for relevant PowerPC routines invoked by libvirt.
Signed-off-by: NPrerna Saxena <prerna@linux.vnet.ibm.com>
Signed-off-by: NAnton Blanchard <anton@au.ibm.com>

AUTHORS

@@ -210,6 +210,7 @@ Patches have also been contributed by:
   Chang Liu            <lingjiao.lc@taobao.com>
   Lorin Hochstein      <lorin@isi.edu>
   Christian Franke     <nobody@nowhere.ws>
+  Prerna Saxena        <prerna@linux.vnet.ibm.com>
 
   [....send patches to get your name here....]
 

src/Makefile.am

@@ -535,7 +535,8 @@ CPU_SOURCES =							\
 		cpu/cpu.h cpu/cpu.c				\
 		cpu/cpu_generic.h cpu/cpu_generic.c		\
 		cpu/cpu_x86.h cpu/cpu_x86.c cpu/cpu_x86_data.h	\
-		cpu/cpu_map.h cpu/cpu_map.c
+		cpu/cpu_map.h cpu/cpu_map.c cpu/cpu_powerpc.h	\
+		cpu/cpu_powerpc.c
 
 VMX_SOURCES =							\
 		vmx/vmx.c vmx/vmx.h

src/cpu/cpu.c

@@ -28,6 +28,7 @@
 #include "xml.h"
 #include "cpu.h"
 #include "cpu_x86.h"
+#include "cpu_powerpc.h"
 #include "cpu_generic.h"
 
 
@@ -36,6 +37,7 @@
 
 static struct cpuArchDriver *drivers[] = {
     &cpuDriverX86,
+    &cpuDriverPowerPC,
     /* generic driver must always be the last one */
     &cpuDriverGeneric
 };

src/cpu/cpu_powerpc.c

+/*
+ * cpu_powerpc.h: CPU driver for PowerPC CPUs
+ *
+ * Copyright (C) Copyright (C) IBM Corporation, 2010
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * 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
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ *
+ * Authors:
+ *      Anton Blanchard <anton@au.ibm.com>
+ *      Prerna Saxena <prerna@linux.vnet.ibm.com>
+ */
+
+#include <config.h>
+
+#include "memory.h"
+#include "cpu.h"
+
+
+#define VIR_FROM_THIS VIR_FROM_CPU
+
+static const char *archs[] = { "ppc64" };
+
+static union cpuData *
+PowerPCNodeData(void)
+{
+    union cpuData *data;
+
+    if (VIR_ALLOC(data) < 0) {
+        virReportOOMError();
+        return NULL;
+    }
+
+    return data;
+}
+
+
+static int
+PowerPCDecode(virCPUDefPtr cpu ATTRIBUTE_UNUSED,
+              const union cpuData *data ATTRIBUTE_UNUSED,
+              const char **models ATTRIBUTE_UNUSED,
+              unsigned int nmodels ATTRIBUTE_UNUSED,
+              const char *preferred ATTRIBUTE_UNUSED)
+{
+        return 0;
+}
+
+static void
+PowerPCDataFree(union cpuData *data)
+{
+   if (data == NULL)
+       return;
+
+   VIR_FREE(data);
+}
+
+struct cpuArchDriver cpuDriverPowerPC = {
+    .name = "ppc64",
+    .arch = archs,
+    .narch = ARRAY_CARDINALITY(archs),
+    .compare    = NULL,
+    .decode     = PowerPCDecode,
+    .encode     = NULL,
+    .free       = PowerPCDataFree,
+    .nodeData   = PowerPCNodeData,
+    .guestData  = NULL,
+    .baseline   = NULL,
+    .update     = NULL,
+    .hasFeature = NULL,
+};

src/cpu/cpu_powerpc.h

+/*
+ * cpu_powerpc.h: CPU driver for PowerPC CPUs
+ *
+ * Copyright (C) Copyright (C) IBM Corporation, 2010
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * 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
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ *
+ * Authors:
+ *      Anton Blanchard <anton@au.ibm.com>
+ *      Prerna Saxena <prerna@linux.vnet.ibm.com>
+ */
+
+#ifndef __VIR_CPU_POWERPC_H__
+# define __VIR_CPU_POWERPC_H__
+
+# include "cpu.h"
+
+extern struct cpuArchDriver cpuDriverPowerPC;
+
+#endif /* __VIR_CPU_POWERPC_H__ */