X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Foprofile%2Foprof.c;h=b82a7b5aaa740520932ade8d84110be5495c13ea;hb=16c70f8c1b54b61c3b951b6fb220df250fe09b32;hp=a85d33dec8c42b9a636eac62260aeaafa8ec4ca0;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/drivers/oprofile/oprof.c b/drivers/oprofile/oprof.c
index a85d33dec..b82a7b5aa 100644
--- a/drivers/oprofile/oprof.c
+++ b/drivers/oprofile/oprof.c
@@ -5,6 +5,10 @@
  * @remark Read the file COPYING
  *
  * @author John Levon <levon@movementarian.org>
+ *
+ * Modified by Aravind Menon for Xen
+ * These modifications are:
+ * Copyright (C) 2005 Hewlett-Packard Co.
  */
 
 #include <linux/kernel.h>
@@ -12,18 +16,20 @@
 #include <linux/init.h>
 #include <linux/oprofile.h>
 #include <linux/moduleparam.h>
-#include <asm/semaphore.h>
+#include <asm/mutex.h>
 
 #include "oprof.h"
 #include "event_buffer.h"
 #include "cpu_buffer.h"
 #include "buffer_sync.h"
 #include "oprofile_stats.h"
- 
-struct oprofile_operations * oprofile_ops;
+
+struct oprofile_operations oprofile_ops;
+
 unsigned long oprofile_started;
+unsigned long backtrace_depth;
 static unsigned long is_setup;
-static DECLARE_MUTEX(start_sem);
+static DEFINE_MUTEX(start_mutex);
 
 /* timer
    0 - use performance monitoring hardware if available
@@ -31,11 +37,37 @@ static DECLARE_MUTEX(start_sem);
  */
 static int timer = 0;
 
+int oprofile_set_active(int active_domains[], unsigned int adomains)
+{
+	int err;
+
+	if (!oprofile_ops.set_active)
+		return -EINVAL;
+
+	mutex_lock(&start_mutex);
+	err = oprofile_ops.set_active(active_domains, adomains);
+	mutex_unlock(&start_mutex);
+	return err;
+}
+
+int oprofile_set_passive(int passive_domains[], unsigned int pdomains)
+{
+	int err;
+
+	if (!oprofile_ops.set_passive)
+		return -EINVAL;
+
+	mutex_lock(&start_mutex);
+	err = oprofile_ops.set_passive(passive_domains, pdomains);
+	mutex_unlock(&start_mutex);
+	return err;
+}
+
 int oprofile_setup(void)
 {
 	int err;
  
-	down(&start_sem);
+	mutex_lock(&start_mutex);
 
 	if ((err = alloc_cpu_buffers()))
 		goto out;
@@ -43,7 +75,7 @@ int oprofile_setup(void)
 	if ((err = alloc_event_buffer()))
 		goto out1;
  
-	if (oprofile_ops->setup && (err = oprofile_ops->setup()))
+	if (oprofile_ops.setup && (err = oprofile_ops.setup()))
 		goto out2;
  
 	/* Note even though this starts part of the
@@ -55,18 +87,18 @@ int oprofile_setup(void)
 		goto out3;
 
 	is_setup = 1;
-	up(&start_sem);
+	mutex_unlock(&start_mutex);
 	return 0;
  
 out3:
-	if (oprofile_ops->shutdown)
-		oprofile_ops->shutdown();
+	if (oprofile_ops.shutdown)
+		oprofile_ops.shutdown();
 out2:
 	free_event_buffer();
 out1:
 	free_cpu_buffers();
 out:
-	up(&start_sem);
+	mutex_unlock(&start_mutex);
 	return err;
 }
 
@@ -76,7 +108,7 @@ int oprofile_start(void)
 {
 	int err = -EINVAL;
  
-	down(&start_sem);
+	mutex_lock(&start_mutex);
  
 	if (!is_setup)
 		goto out;
@@ -88,12 +120,12 @@ int oprofile_start(void)
  
 	oprofile_reset_stats();
 
-	if ((err = oprofile_ops->start()))
+	if ((err = oprofile_ops.start()))
 		goto out;
 
 	oprofile_started = 1;
 out:
-	up(&start_sem); 
+	mutex_unlock(&start_mutex);
 	return err;
 }
 
@@ -101,63 +133,70 @@ out:
 /* echo 0>/dev/oprofile/enable */
 void oprofile_stop(void)
 {
-	down(&start_sem);
+	mutex_lock(&start_mutex);
 	if (!oprofile_started)
 		goto out;
-	oprofile_ops->stop();
+	oprofile_ops.stop();
 	oprofile_started = 0;
 	/* wake up the daemon to read what remains */
 	wake_up_buffer_waiter();
 out:
-	up(&start_sem);
+	mutex_unlock(&start_mutex);
 }
 
 
 void oprofile_shutdown(void)
 {
-	down(&start_sem);
+	mutex_lock(&start_mutex);
 	sync_stop();
-	if (oprofile_ops->shutdown)
-		oprofile_ops->shutdown(); 
+	if (oprofile_ops.shutdown)
+		oprofile_ops.shutdown();
 	is_setup = 0;
 	free_event_buffer();
 	free_cpu_buffers();
-	up(&start_sem);
+	mutex_unlock(&start_mutex);
 }
 
 
-extern void timer_init(struct oprofile_operations ** ops);
+int oprofile_set_backtrace(unsigned long val)
+{
+	int err = 0;
 
+	mutex_lock(&start_mutex);
 
-static int __init oprofile_init(void)
-{
-	/* Architecture must fill in the interrupt ops and the
-	 * logical CPU type, or we can fall back to the timer
-	 * interrupt profiler.
-	 */
-	int err = oprofile_arch_init(&oprofile_ops);
+	if (oprofile_started) {
+		err = -EBUSY;
+		goto out;
+	}
 
-	if (err == -ENODEV || timer) {
-		timer_init(&oprofile_ops);
-		err = 0;
-	} else if (err) {
+	if (!oprofile_ops.backtrace) {
+		err = -EINVAL;
 		goto out;
 	}
 
-	if (!oprofile_ops->cpu_type) {
-		printk(KERN_ERR "oprofile: cpu_type not set !\n");
-		err = -EFAULT;
-	} else {
-		err = oprofilefs_register();
+	backtrace_depth = val;
+
+out:
+	mutex_unlock(&start_mutex);
+	return err;
+}
+
+static int __init oprofile_init(void)
+{
+	int err;
+
+	err = oprofile_arch_init(&oprofile_ops);
+
+	if (err < 0 || timer) {
+		printk(KERN_INFO "oprofile: using timer interrupt.\n");
+		oprofile_timer_init(&oprofile_ops);
 	}
- 
+
+	err = oprofilefs_register();
 	if (err)
-		goto out_exit;
-out:
+		oprofile_arch_exit();
+
 	return err;
-out_exit:
-	oprofile_arch_exit();
-	goto out;
 }