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[libvirt] [RFC PATCH 2/4] powerpc: Add cpu driver for powerpc host



This part of code primarily compares host and guest CPUs of a given
architecture for feature compatibility. x86 makes this choice based on
CPUID comparison.
Presently the PowerPC code has stubs to just get a 'pseries' guest to
boot. It would be augmented going forward, to do a detailed feature
comparison between guest and host CPUs on powerpc.
This part of code is presently well-classified into different
architectures, and consequently does not need reorganizing.

---
 src/Makefile.am       |    3 +-
 src/cpu/cpu.c         |    2 +
 src/cpu/cpu_powerpc.c |   81 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/cpu/cpu_powerpc.h |   32 +++++++++++++++++++
 4 files changed, 117 insertions(+), 1 deletions(-)
 create mode 100644 src/cpu/cpu_powerpc.c
 create mode 100644 src/cpu/cpu_powerpc.h

diff --git a/src/Makefile.am b/src/Makefile.am
index 738ee91..4f990fd 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -511,7 +511,8 @@ 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
diff --git a/src/cpu/cpu.c b/src/cpu/cpu.c
index 2906be9..e8a65f0 100644
--- a/src/cpu/cpu.c
+++ b/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
 };
diff --git a/src/cpu/cpu_powerpc.c b/src/cpu/cpu_powerpc.c
new file mode 100644
index 0000000..6ceedc3
--- /dev/null
+++ b/src/cpu/cpu_powerpc.c
@@ -0,0 +1,81 @@
+/*
+ * 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,
+              const union cpuData *data,
+              const char **models,
+              unsigned int nmodels,
+              const char *preferred)
+{
+	return 0;
+}
+
+static int
+PowerPCDataFree(union cpuData *data)
+{
+   if (data == NULL)
+       return 0;
+
+   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,
+};
diff --git a/src/cpu/cpu_powerpc.h b/src/cpu/cpu_powerpc.h
new file mode 100644
index 0000000..2e0c1a5
--- /dev/null
+++ b/src/cpu/cpu_powerpc.h
@@ -0,0 +1,32 @@
+/*
+ * 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__ */
-- 
1.7.0.4


-- 
Prerna Saxena

Linux Technology Centre,
IBM Systems and Technology Lab,
Bangalore, India


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