Merge branch 'oprofile-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'oprofile-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  oprofile: introduce module_param oprofile.cpu_type
  oprofile: add support for Core i7 and Atom
  oprofile: remove undocumented oprofile.p4force option
  oprofile: re-add force_arch_perfmon option

2 files changed, 31 insertions, 4 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index af43f45e8358..f08e2bebb186 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1665,6 +1665,14 @@ and is between 256 and 4096 characters. It is defined in the file
         oprofile.timer= [HW]
                         Use timer interrupt instead of performance counters
 
+        oprofile.cpu_type=      Force an oprofile cpu type
+                        This might be useful if you have an older oprofile
+                        userland or if you want common events.
+                        Format: { archperfmon }
+                        archperfmon: [X86] Force use of architectural
+                                perfmon on Intel CPUs instead of the
+                                CPU specific event set.
+
         osst=           [HW,SCSI] SCSI Tape Driver
                         Format: <buffer_size>,<write_threshold>
                         See also Documentation/scsi/st.txt.
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 202864ad49a7..3b285e656e27 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -356,14 +356,11 @@ static void exit_sysfs(void)
 #define exit_sysfs() do { } while (0)
 #endif /* CONFIG_PM */
 
-static int p4force;
-module_param(p4force, int, 0);
-
 static int __init p4_init(char **cpu_type)
 {
         __u8 cpu_model = boot_cpu_data.x86_model;
 
-        if (!p4force && (cpu_model > 6 || cpu_model == 5))
+        if (cpu_model > 6 || cpu_model == 5)
                 return 0;
 
 #ifndef CONFIG_SMP
@@ -389,10 +386,25 @@ static int __init p4_init(char **cpu_type)
         return 0;
 }
 
+static int force_arch_perfmon;
+static int force_cpu_type(const char *str, struct kernel_param *kp)
+{
+        if (!strcmp(str, "archperfmon")) {
+                force_arch_perfmon = 1;
+                printk(KERN_INFO "oprofile: forcing architectural perfmon\n");
+        }
+
+        return 0;
+}
+module_param_call(cpu_type, force_cpu_type, NULL, NULL, 0);
+
 static int __init ppro_init(char **cpu_type)
 {
         __u8 cpu_model = boot_cpu_data.x86_model;
 
+        if (force_arch_perfmon && cpu_has_arch_perfmon)
+                return 0;
+
         switch (cpu_model) {
         case 0 ... 2:
                 *cpu_type = "i386/ppro";
@@ -414,6 +426,13 @@ static int __init ppro_init(char **cpu_type)
         case 15: case 23:
                 *cpu_type = "i386/core_2";
                 break;
+        case 26:
+                arch_perfmon_setup_counters();
+                *cpu_type = "i386/core_i7";
+                break;
+        case 28:
+                *cpu_type = "i386/atom";
+                break;
         default:
                 /* Unknown */
                 return 0;