1 files changed, 16 insertions, 0 deletions

diff --git a/tools/power/cpupower/utils/helpers/msr.c b/tools/power/cpupower/utils/helpers/msr.c
index 93d48bd56e57..7869ca64dfd3 100644
--- a/tools/power/cpupower/utils/helpers/msr.c
+++ b/tools/power/cpupower/utils/helpers/msr.c
@@ -11,6 +11,7 @@
 #define MSR_IA32_PERF_STATUS            0x198
 #define MSR_IA32_MISC_ENABLES           0x1a0
 #define MSR_IA32_ENERGY_PERF_BIAS       0x1b0
+#define MSR_NEHALEM_TURBO_RATIO_LIMIT   0x1ad
 
 /*
  * read_msr
@@ -79,6 +80,7 @@ int msr_intel_has_boost_support(unsigned int cpu)
         ret = read_msr(cpu, MSR_IA32_MISC_ENABLES, &misc_enables);
         if (ret)
                 return ret;
+
         return (misc_enables >> 38) & 0x1;
 }
 
@@ -119,4 +121,18 @@ int msr_intel_set_perf_bias(unsigned int cpu, unsigned int val)
                 return ret;
         return 0;
 }
+
+unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu)
+{
+        unsigned long long val;
+        int ret;
+
+        if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_HAS_TURBO_RATIO))
+                return -1;
+
+        ret = read_msr(cpu, MSR_NEHALEM_TURBO_RATIO_LIMIT, &val);
+        if (ret)
+                return ret;
+        return val;
+}
 #endif