x86/oprofile: introduce model specific init/exit functions

This patch implements model specific OProfile init/exit functions for
x86 CPUs. Though there is more rework needed at the initialization
code, this new introduced functions allow it to keep model specific
code in the corresponding op_model_*.c files.

The function interface is the same as for oprofile_arch_init/exit().
Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: oprofile-list <oprofile-list@lists.sourceforge.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/oprofile/nmi_int.c

 /**
  * @file nmi_int.c
  *
- * @remark Copyright 2002 OProfile authors
+ * @remark Copyright 2002-2008 OProfile authors
  * @remark Read the file COPYING
  *
  * @author John Levon <levon@movementarian.org>
+ * @author Robert Richter <robert.richter@amd.com>
  */
 
 #include <linux/init.h>
@@ -411,6 +412,7 @@ int __init op_nmi_init(struct oprofile_operations *ops)
 	__u8 vendor = boot_cpu_data.x86_vendor;
 	__u8 family = boot_cpu_data.x86;
 	char *cpu_type;
+	int ret = 0;
 
 	if (!cpu_has_apic)
 		return -ENODEV;
@@ -466,6 +468,11 @@ int __init op_nmi_init(struct oprofile_operations *ops)
 		return -ENODEV;
 	}
 
+	if (model->init)
+		ret = model->init(ops);
+	if (ret)
+		return ret;
+
 	init_sysfs();
 	using_nmi = 1;
 	ops->create_files = nmi_create_files;
@@ -482,4 +489,6 @@ void op_nmi_exit(void)
 {
 	if (using_nmi)
 		exit_sysfs();
+	if (model->exit)
+		model->exit();
 }

arch/x86/oprofile/op_model_athlon.c

 /*
- * @file op_model_athlon.h
+ * @file op_model_athlon.c
  * athlon / K7 / K8 / Family 10h model-specific MSR operations
  *
- * @remark Copyright 2002 OProfile authors
+ * @remark Copyright 2002-2008 OProfile authors
  * @remark Read the file COPYING
  *
  * @author John Levon
  * @author Philippe Elie
  * @author Graydon Hoare
- */
+ * @author Robert Richter <robert.richter@amd.com>
+*/
 
 #include <linux/oprofile.h>
 #include <asm/ptrace.h>
@@ -178,7 +179,18 @@ static void athlon_shutdown(struct op_msrs const * const msrs)
 	}
 }
 
+static int op_amd_init(struct oprofile_operations *ops)
+{
+	return 0;
+}
+
+static void op_amd_exit(void)
+{
+}
+
 struct op_x86_model_spec const op_athlon_spec = {
+	.init = op_amd_init,
+	.exit = op_amd_exit,
 	.num_counters = NUM_COUNTERS,
 	.num_controls = NUM_CONTROLS,
 	.fill_in_addresses = &athlon_fill_in_addresses,

arch/x86/oprofile/op_x86_model.h

@@ -32,6 +32,8 @@ struct pt_regs;
  * various x86 CPU models' perfctr support.
  */
 struct op_x86_model_spec {
+	int (*init)(struct oprofile_operations *ops);
+	void (*exit)(void);
 	unsigned int const num_counters;
 	unsigned int const num_controls;
 	void (*fill_in_addresses)(struct op_msrs * const msrs);