OProfile: enable IBS for AMD CPUs

Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: oprofile-list <oprofile-list@lists.sourceforge.net>
Cc: Barry Kasindorf <barry.kasindorf@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 25 insertions, 7 deletions

diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index b29819313f2b..287513a09819 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -468,6 +468,14 @@ int __init op_nmi_init(struct oprofile_operations *ops)
                 return -ENODEV;
         }
 
+        /* default values, can be overwritten by model */
+        ops->create_files = nmi_create_files;
+        ops->setup = nmi_setup;
+        ops->shutdown = nmi_shutdown;
+        ops->start = nmi_start;
+        ops->stop = nmi_stop;
+        ops->cpu_type = cpu_type;
+
         if (model->init)
                 ret = model->init(ops);
         if (ret)
@@ -475,12 +483,6 @@ int __init op_nmi_init(struct oprofile_operations *ops)
 
         init_sysfs();
         using_nmi = 1;
-        ops->create_files = nmi_create_files;
-        ops->setup = nmi_setup;
-        ops->shutdown = nmi_shutdown;
-        ops->start = nmi_start;
-        ops->stop = nmi_stop;
-        ops->cpu_type = cpu_type;
         printk(KERN_INFO "oprofile: using NMI interrupt.\n");
         return 0;
 }
diff --git a/arch/x86/oprofile/op_model_athlon.c b/arch/x86/oprofile/op_model_athlon.c
index 2650b12a0c56..0d8390319797 100644
--- a/arch/x86/oprofile/op_model_athlon.c
+++ b/arch/x86/oprofile/op_model_athlon.c
@@ -446,13 +446,25 @@ static void clear_ibs_nmi(void)
                 on_each_cpu(apic_clear_ibs_nmi_per_cpu, NULL, 1);
 }
 
+static int (*create_arch_files)(struct super_block * sb, struct dentry * root);
+
 static int setup_ibs_files(struct super_block * sb, struct dentry * root)
 {
         char buf[12];
         struct dentry *dir;
+        int ret = 0;
+
+        /* architecture specific files */
+        if (create_arch_files)
+                ret = create_arch_files(sb, root);
+
+        if (ret)
+                return ret;
 
         if (!ibs_allowed)
-                return 0;
+                return ret;
+
+        /* model specific files */
 
         /* setup some reasonable defaults */
         ibs_config.max_cnt_fetch = 250000;
@@ -482,11 +494,15 @@ static int setup_ibs_files(struct super_block * sb, struct dentry * root)
 
 static int op_amd_init(struct oprofile_operations *ops)
 {
+        setup_ibs();
+        create_arch_files = ops->create_files;
+        ops->create_files = setup_ibs_files;
         return 0;
 }
 
 static void op_amd_exit(void)
 {
+        clear_ibs_nmi();
 }
 
 struct op_x86_model_spec const op_amd_spec = {