perf/x86/intel, watchdog: Switch NMI watchdog to ref cycles on x86

[cascardo/linux.git] / arch / x86 / kernel / apic / hw_nmi.c

diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c
index 7788ce6..016f426 100644 (file)
--- a/arch/x86/kernel/apic/hw_nmi.c
+++ b/arch/x86/kernel/apic/hw_nmi.c
@@ -18,8 +18,16 @@
 #include <linux/nmi.h>
 #include <linux/module.h>
 #include <linux/delay.h>
+#include <linux/perf_event.h>
 
 #ifdef CONFIG_HARDLOCKUP_DETECTOR
+int hw_nmi_get_event(void)
+{
+       if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+               return PERF_COUNT_HW_REF_CPU_CYCLES;
+       return PERF_COUNT_HW_CPU_CYCLES;
+}
+
 u64 hw_nmi_get_sample_period(int watchdog_thresh)
 {
        return (u64)(cpu_khz) * 1000 * watchdog_thresh;