Merge branch 'core' of git://amd64.org/linux/rric into perf/core

[karo-tx-linux.git] / arch / x86 / oprofile / nmi_int.c

diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 75f9528e037283b4dabaef93f8bcf9ab3c9984fb..26b8a8514ee566e8a7d235a06de1037c2641adec 100644 (file)
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -595,24 +595,36 @@ 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)
+enum __force_cpu_type {
+       reserved = 0,           /* do not force */
+       timer,
+       arch_perfmon,
+};
+
+static int force_cpu_type;
+
+static int set_cpu_type(const char *str, struct kernel_param *kp)
 {
-       if (!strcmp(str, "arch_perfmon")) {
-               force_arch_perfmon = 1;
+       if (!strcmp(str, "timer")) {
+               force_cpu_type = timer;
+               printk(KERN_INFO "oprofile: forcing NMI timer mode\n");
+       } else if (!strcmp(str, "arch_perfmon")) {
+               force_cpu_type = arch_perfmon;
                printk(KERN_INFO "oprofile: forcing architectural perfmon\n");
+       } else {
+               force_cpu_type = 0;
        }
 
        return 0;
 }
-module_param_call(cpu_type, force_cpu_type, NULL, NULL, 0);
+module_param_call(cpu_type, set_cpu_type, NULL, NULL, 0);
 
 static int __init ppro_init(char **cpu_type)
 {
        __u8 cpu_model = boot_cpu_data.x86_model;
        struct op_x86_model_spec *spec = &op_ppro_spec; /* default */
 
-       if (force_arch_perfmon && cpu_has_arch_perfmon)
+       if (force_cpu_type == arch_perfmon && cpu_has_arch_perfmon)
                return 0;
 
        /*
@@ -679,6 +691,9 @@ int __init op_nmi_init(struct oprofile_operations *ops)
        if (!cpu_has_apic)
                return -ENODEV;
 
+       if (force_cpu_type == timer)
+               return -ENODEV;
+
        switch (vendor) {
        case X86_VENDOR_AMD:
                /* Needs to be at least an Athlon (or hammer in 32bit mode) */