arch/x86/kernel/smpboot.c      |    1 +
 drivers/cpufreq/acpi-cpufreq.c |    8 ++++++++
 2 files changed, 9 insertions(+)

Index: linux-pm/drivers/cpufreq/acpi-cpufreq.c
===================================================================

--- linux-pm.orig/drivers/cpufreq/acpi-cpufreq.c
+++ linux-pm/drivers/cpufreq/acpi-cpufreq.c

@@ -806,6 +806,14 @@ static int acpi_cpufreq_cpu_init(struct
 		state_count++;
 		valid_states++;
 		data->first_perf_state = valid_states;
+	} else {
+		/*
+		 * If the maximum "boost" frequency is unknown, ask the arch
+		 * scale-invariance code to use the "nominal" performance for
+		 * CPU utilization scaling so as to prevent the schedutil
+		 * governor from selecting inadequate CPU frequencies.
+		 */
+		arch_set_max_freq_ratio(true);
 	}
 
 	freq_table = kcalloc(state_count, sizeof(*freq_table), GFP_KERNEL);

Index: linux-pm/arch/x86/kernel/smpboot.c
===================================================================

--- linux-pm.orig/arch/x86/kernel/smpboot.c
+++ linux-pm/arch/x86/kernel/smpboot.c

@@ -1833,6 +1833,7 @@ void arch_set_max_freq_ratio(bool turbo_
 	arch_max_freq_ratio = turbo_disabled ? SCHED_CAPACITY_SCALE :
 					arch_turbo_freq_ratio;
 }
+EXPORT_SYMBOL_GPL(arch_set_max_freq_ratio);