cpupower: Add Haswell family 0x45 specific idle monitor to show PC8,9,10 states

This specific processor supports 3 new package sleep states.
Provide a monitor, so that the user can see their usage.

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

3 files changed, 198 insertions, 0 deletions

diff --git a/tools/power/cpupower/Makefile b/tools/power/cpupower/Makefile
index ce17f30f04ba..cbfec92af327 100644
--- a/tools/power/cpupower/Makefile
+++ b/tools/power/cpupower/Makefile
@@ -128,6 +128,7 @@ UTIL_OBJS =  utils/helpers/amd.o utils/helpers/topology.o utils/helpers/msr.o \
         utils/helpers/sysfs.o utils/helpers/misc.o utils/helpers/cpuid.o \
         utils/helpers/pci.o utils/helpers/bitmask.o \
         utils/idle_monitor/nhm_idle.o utils/idle_monitor/snb_idle.o \
+        utils/idle_monitor/hsw_ext_idle.o \
         utils/idle_monitor/amd_fam14h_idle.o utils/idle_monitor/cpuidle_sysfs.o \
         utils/idle_monitor/mperf_monitor.o utils/idle_monitor/cpupower-monitor.o \
         utils/cpupower.o utils/cpufreq-info.o utils/cpufreq-set.o \
diff --git a/tools/power/cpupower/utils/idle_monitor/hsw_ext_idle.c b/tools/power/cpupower/utils/idle_monitor/hsw_ext_idle.c
new file mode 100644
index 000000000000..ebeaba6571a3
--- /dev/null
+++ b/tools/power/cpupower/utils/idle_monitor/hsw_ext_idle.c
@@ -0,0 +1,196 @@
+/*
+ *  (C) 2010,2011       Thomas Renninger <trenn@suse.de>, Novell Inc.
+ *
+ *  Licensed under the terms of the GNU GPL License version 2.
+ *
+ *  Based on SandyBridge monitor. Implements the new package C-states
+ *  (PC8, PC9, PC10) coming with a specific Haswell (family 0x45) CPU.
+ */
+
+#if defined(__i386__) || defined(__x86_64__)
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "helpers/helpers.h"
+#include "idle_monitor/cpupower-monitor.h"
+
+#define MSR_PKG_C8_RESIDENCY           0x00000630
+#define MSR_PKG_C9_RESIDENCY           0x00000631
+#define MSR_PKG_C10_RESIDENCY          0x00000632
+
+#define MSR_TSC 0x10
+
+enum intel_hsw_ext_id { PC8 = 0, PC9, PC10, HSW_EXT_CSTATE_COUNT,
+                        TSC = 0xFFFF };
+
+static int hsw_ext_get_count_percent(unsigned int self_id, double *percent,
+                                 unsigned int cpu);
+
+static cstate_t hsw_ext_cstates[HSW_EXT_CSTATE_COUNT] = {
+        {
+                .name                   = "PC8",
+                .desc                   = N_("Processor Package C8"),
+                .id                     = PC8,
+                .range                  = RANGE_PACKAGE,
+                .get_count_percent      = hsw_ext_get_count_percent,
+        },
+        {
+                .name                   = "PC9",
+                .desc                   = N_("Processor Package C9"),
+                .desc                   = N_("Processor Package C2"),
+                .id                     = PC9,
+                .range                  = RANGE_PACKAGE,
+                .get_count_percent      = hsw_ext_get_count_percent,
+        },
+        {
+                .name                   = "PC10",
+                .desc                   = N_("Processor Package C10"),
+                .id                     = PC10,
+                .range                  = RANGE_PACKAGE,
+                .get_count_percent      = hsw_ext_get_count_percent,
+        },
+};
+
+static unsigned long long tsc_at_measure_start;
+static unsigned long long tsc_at_measure_end;
+static unsigned long long *previous_count[HSW_EXT_CSTATE_COUNT];
+static unsigned long long *current_count[HSW_EXT_CSTATE_COUNT];
+/* valid flag for all CPUs. If a MSR read failed it will be zero */
+static int *is_valid;
+
+static int hsw_ext_get_count(enum intel_hsw_ext_id id, unsigned long long *val,
+                        unsigned int cpu)
+{
+        int msr;
+
+        switch (id) {
+        case PC8:
+                msr = MSR_PKG_C8_RESIDENCY;
+                break;
+        case PC9:
+                msr = MSR_PKG_C9_RESIDENCY;
+                break;
+        case PC10:
+                msr = MSR_PKG_C10_RESIDENCY;
+                break;
+        case TSC:
+                msr = MSR_TSC;
+                break;
+        default:
+                return -1;
+        };
+        if (read_msr(cpu, msr, val))
+                return -1;
+        return 0;
+}
+
+static int hsw_ext_get_count_percent(unsigned int id, double *percent,
+                                 unsigned int cpu)
+{
+        *percent = 0.0;
+
+        if (!is_valid[cpu])
+                return -1;
+
+        *percent = (100.0 *
+                (current_count[id][cpu] - previous_count[id][cpu])) /
+                (tsc_at_measure_end - tsc_at_measure_start);
+
+        dprint("%s: previous: %llu - current: %llu - (%u)\n",
+                hsw_ext_cstates[id].name, previous_count[id][cpu],
+                current_count[id][cpu], cpu);
+
+        dprint("%s: tsc_diff: %llu - count_diff: %llu - percent: %2.f (%u)\n",
+               hsw_ext_cstates[id].name,
+               (unsigned long long) tsc_at_measure_end - tsc_at_measure_start,
+               current_count[id][cpu] - previous_count[id][cpu],
+               *percent, cpu);
+
+        return 0;
+}
+
+static int hsw_ext_start(void)
+{
+        int num, cpu;
+        unsigned long long val;
+
+        for (num = 0; num < HSW_EXT_CSTATE_COUNT; num++) {
+                for (cpu = 0; cpu < cpu_count; cpu++) {
+                        hsw_ext_get_count(num, &val, cpu);
+                        previous_count[num][cpu] = val;
+                }
+        }
+        hsw_ext_get_count(TSC, &tsc_at_measure_start, 0);
+        return 0;
+}
+
+static int hsw_ext_stop(void)
+{
+        unsigned long long val;
+        int num, cpu;
+
+        hsw_ext_get_count(TSC, &tsc_at_measure_end, 0);
+
+        for (num = 0; num < HSW_EXT_CSTATE_COUNT; num++) {
+                for (cpu = 0; cpu < cpu_count; cpu++) {
+                        is_valid[cpu] = !hsw_ext_get_count(num, &val, cpu);
+                        current_count[num][cpu] = val;
+                }
+        }
+        return 0;
+}
+
+struct cpuidle_monitor intel_hsw_ext_monitor;
+
+static struct cpuidle_monitor *hsw_ext_register(void)
+{
+        int num;
+
+        if (cpupower_cpu_info.vendor != X86_VENDOR_INTEL
+            || cpupower_cpu_info.family != 6)
+                return NULL;
+
+        switch (cpupower_cpu_info.model) {
+        case 0x45: /* HSW */
+                break;
+        default:
+                return NULL;
+        }
+
+        is_valid = calloc(cpu_count, sizeof(int));
+        for (num = 0; num < HSW_EXT_CSTATE_COUNT; num++) {
+                previous_count[num] = calloc(cpu_count,
+                                        sizeof(unsigned long long));
+                current_count[num]  = calloc(cpu_count,
+                                        sizeof(unsigned long long));
+        }
+        intel_hsw_ext_monitor.name_len = strlen(intel_hsw_ext_monitor.name);
+        return &intel_hsw_ext_monitor;
+}
+
+void hsw_ext_unregister(void)
+{
+        int num;
+        free(is_valid);
+        for (num = 0; num < HSW_EXT_CSTATE_COUNT; num++) {
+                free(previous_count[num]);
+                free(current_count[num]);
+        }
+}
+
+struct cpuidle_monitor intel_hsw_ext_monitor = {
+        .name                   = "HaswellExtended",
+        .hw_states              = hsw_ext_cstates,
+        .hw_states_num          = HSW_EXT_CSTATE_COUNT,
+        .start                  = hsw_ext_start,
+        .stop                   = hsw_ext_stop,
+        .do_register            = hsw_ext_register,
+        .unregister             = hsw_ext_unregister,
+        .needs_root             = 1,
+        .overflow_s             = 922000000 /* 922337203 seconds TSC overflow
+                                               at 20GHz */
+};
+#endif /* defined(__i386__) || defined(__x86_64__) */
diff --git a/tools/power/cpupower/utils/idle_monitor/idle_monitors.def b/tools/power/cpupower/utils/idle_monitor/idle_monitors.def
index e3f8d9b2b18f..0d6ba4dbb9c7 100644
--- a/tools/power/cpupower/utils/idle_monitor/idle_monitors.def
+++ b/tools/power/cpupower/utils/idle_monitor/idle_monitors.def
@@ -2,6 +2,7 @@
 DEF(amd_fam14h)
 DEF(intel_nhm)
 DEF(intel_snb)
+DEF(intel_hsw_ext)
 DEF(mperf)
 #endif
 DEF(cpuidle_sysfs)