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[libvirt] [RFC v3 PATCH 2/5] PowerPC : Add PPC CPU driver



From: Prerna Saxena <prerna linux vnet ibm com>
Date: Mon, 3 Oct 2011 05:56:20 -0700
Subject: [PATCH 2/5] 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: Prerna Saxena <prerna linux vnet ibm com>
Signed-off-by: Anton Blanchard <anton au ibm com>
---
 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 33a32a8..aea3ddd 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -533,7 +533,8 @@ 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 b919b6e..e4149e2 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..ed81694
--- /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 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,
+};
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__ */
-- 
1.7.7



-- 
Prerna Saxena

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


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