Merge tag 'pm-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "This time (again) cpufreq gets the majority of changes which mostly
  are driver updates (including a major consolidation of intel_pstate),
  some schedutil governor modifications and core cleanups.

  There also are some changes in the system suspend area, mostly related
  to diagnostics and debug messages plus some renames of things related
  to suspend-to-idle. One major change here is that suspend-to-idle is
  now going to be preferred over S3 on systems where the ACPI tables
  indicate to do so and provide requsite support (the Low Power Idle S0
  _DSM in particular). The system sleep documentation and the tools
  related to it are updated too.

  The rest is a few cpuidle changes (nothing major), devfreq updates,
  generic power domains (genpd) framework updates and a few assorted
  modifications elsewhere.

  Specifics:

   - Drop the P-state selection algorithm based on a PID controller from
     intel_pstate and make it use the same P-state selection method
     (based on the CPU load) for all types of systems in the active mode
     (Rafael Wysocki, Srinivas Pandruvada).

   - Rework the cpufreq core and governors to make it possible to take
     cross-CPU utilization updates into account and modify the schedutil
     governor to actually do so (Viresh Kumar).

   - Clean up the handling of transition latency information in the
     cpufreq core and untangle it from the information on which drivers
     cannot do dynamic frequency switching (Viresh Kumar).

   - Add support for new SoCs (MT2701/MT7623 and MT7622) to the mediatek
     cpufreq driver and update its DT bindings (Sean Wang).

   - Modify the cpufreq dt-platdev driver to autimatically create
     cpufreq devices for the new (v2) Operating Performance Points (OPP)
     DT bindings and update its whitelist of supported systems (Viresh
     Kumar, Shubhrajyoti Datta, Marc Gonzalez, Khiem Nguyen, Finley
     Xiao).

   - Add support for Ux500 to the cpufreq-dt driver and drop the
     obsolete dbx500 cpufreq driver (Linus Walleij, Arnd Bergmann).

   - Add new SoC (R8A7795) support to the cpufreq rcar driver (Khiem
     Nguyen).

   - Fix and clean up assorted issues in the cpufreq drivers and core
     (Arvind Yadav, Christophe Jaillet, Colin Ian King, Gustavo Silva,
     Julia Lawall, Leonard Crestez, Rob Herring, Sudeep Holla).

   - Update the IO-wait boost handling in the schedutil governor to make
     it less aggressive (Joel Fernandes).

   - Rework system suspend diagnostics to make it print fewer messages
     to the kernel log by default, add a sysfs knob to allow more
     suspend-related messages to be printed and add Low Power S0 Idle
     constraints checks to the ACPI suspend-to-idle code (Rafael
     Wysocki, Srinivas Pandruvada).

   - Prefer suspend-to-idle over S3 on ACPI-based systems with the
     ACPI_FADT_LOW_POWER_S0 flag set and the Low Power Idle S0 _DSM
     interface present in the ACPI tables (Rafael Wysocki).

   - Update documentation related to system sleep and rename a number of
     items in the code to make it cleare that they are related to
     suspend-to-idle (Rafael Wysocki).

   - Export a variable allowing device drivers to check the target
     system sleep state from the core system suspend code (Florian
     Fainelli).

   - Clean up the cpuidle subsystem to handle the polling state on x86
     in a more straightforward way and to use %pOF instead of full_name
     (Rafael Wysocki, Rob Herring).

   - Update the devfreq framework to fix and clean up a few minor issues
     (Chanwoo Choi, Rob Herring).

   - Extend diagnostics in the generic power domains (genpd) framework
     and clean it up slightly (Thara Gopinath, Rob Herring).

   - Fix and clean up a couple of issues in the operating performance
     points (OPP) framework (Viresh Kumar, Waldemar Rymarkiewicz).

   - Add support for RV1108 to the rockchip-io Adaptive Voltage Scaling
     (AVS) driver (David Wu).

   - Fix the usage of notifiers in CPU power management on some
     platforms (Alex Shi).

   - Update the pm-graph system suspend/hibernation and boot profiling
     utility (Todd Brandt).

   - Make it possible to run the cpupower utility without CPU0 (Prarit
     Bhargava)"

* tag 'pm-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (87 commits)
  cpuidle: Make drivers initialize polling state
  cpuidle: Move polling state initialization code to separate file
  cpuidle: Eliminate the CPUIDLE_DRIVER_STATE_START symbol
  cpufreq: imx6q: Fix imx6sx low frequency support
  cpufreq: speedstep-lib: make several arrays static, makes code smaller
  PM: docs: Delete the obsolete states.txt document
  PM: docs: Describe high-level PM strategies and sleep states
  PM / devfreq: Fix memory leak when fail to register device
  PM / devfreq: Add dependency on PM_OPP
  PM / devfreq: Move private devfreq_update_stats() into devfreq
  PM / devfreq: Convert to using %pOF instead of full_name
  PM / AVS: rockchip-io: add io selectors and supplies for RV1108
  cpufreq: ti: Fix 'of_node_put' being called twice in error handling path
  cpufreq: dt-platdev: Drop few entries from whitelist
  cpufreq: dt-platdev: Automatically create cpufreq device with OPP v2
  ARM: ux500: don't select CPUFREQ_DT
  cpuidle: Convert to using %pOF instead of full_name
  cpufreq: Convert to using %pOF instead of full_name
  PM / Domains: Convert to using %pOF instead of full_name
  cpufreq: Cap the default transition delay value to 10 ms
  ...

8 files changed, 28 insertions, 17 deletions

diff --git a/tools/power/cpupower/utils/cpupower.c b/tools/power/cpupower/utils/cpupower.c
index 9ea914378985..2dccf4998599 100644
--- a/tools/power/cpupower/utils/cpupower.c
+++ b/tools/power/cpupower/utils/cpupower.c
@@ -12,6 +12,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <errno.h>
+#include <sched.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/utsname.h>
@@ -31,6 +32,7 @@ static int cmd_help(int argc, const char **argv);
  */
 struct cpupower_cpu_info cpupower_cpu_info;
 int run_as_root;
+int base_cpu;
 /* Affected cpus chosen by -c/--cpu param */
 struct bitmask *cpus_chosen;
 
@@ -174,6 +176,7 @@ int main(int argc, const char *argv[])
 	unsigned int i, ret;
 	struct stat statbuf;
 	struct utsname uts;
+	char pathname[32];
 
 	cpus_chosen = bitmask_alloc(sysconf(_SC_NPROCESSORS_CONF));
 
@@ -198,17 +201,23 @@ int main(int argc, const char *argv[])
 		argv[0] = cmd = "help";
 	}
 
-	get_cpu_info(0, &cpupower_cpu_info);
+	base_cpu = sched_getcpu();
+	if (base_cpu < 0) {
+		fprintf(stderr, _("No valid cpus found.\n"));
+		return EXIT_FAILURE;
+	}
+
+	get_cpu_info(&cpupower_cpu_info);
 	run_as_root = !geteuid();
 	if (run_as_root) {
 		ret = uname(&uts);
+		sprintf(pathname, "/dev/cpu/%d/msr", base_cpu);
 		if (!ret && !strcmp(uts.machine, "x86_64") &&
-		    stat("/dev/cpu/0/msr", &statbuf) != 0) {
+		    stat(pathname, &statbuf) != 0) {
 			if (system("modprobe msr") == -1)
 	fprintf(stderr, _("MSR access not available.\n"));
 		}
 	}
-		
 
 	for (i = 0; i < ARRAY_SIZE(commands); i++) {
 		struct cmd_struct *p = commands + i;
diff --git a/tools/power/cpupower/utils/helpers/cpuid.c b/tools/power/cpupower/utils/helpers/cpuid.c
index 39c2c7d067bb..32d37c9be791 100644
--- a/tools/power/cpupower/utils/helpers/cpuid.c
+++ b/tools/power/cpupower/utils/helpers/cpuid.c
@@ -42,7 +42,7 @@ cpuid_func(edx);
  *
  * TBD: Should there be a cpuid alternative for this if /proc is not mounted?
  */
-int get_cpu_info(unsigned int cpu, struct cpupower_cpu_info *cpu_info)
+int get_cpu_info(struct cpupower_cpu_info *cpu_info)
 {
 	FILE *fp;
 	char value[64];
@@ -70,7 +70,7 @@ int get_cpu_info(unsigned int cpu, struct cpupower_cpu_info *cpu_info)
 		if (!strncmp(value, "processor\t: ", 12))
 			sscanf(value, "processor\t: %u", &proc);
 
-		if (proc != cpu)
+		if (proc != (unsigned int)base_cpu)
 			continue;
 
 		/* Get CPU vendor */
diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h
index 799a18be60aa..41da392be448 100644
--- a/tools/power/cpupower/utils/helpers/helpers.h
+++ b/tools/power/cpupower/utils/helpers/helpers.h
@@ -34,6 +34,7 @@
 /* Internationalization ****************************/
 
 extern int run_as_root;
+extern int base_cpu;
 extern struct bitmask *cpus_chosen;
 
 /* Global verbose (-d) stuff *********************************/
@@ -87,11 +88,11 @@ struct cpupower_cpu_info {
  *
  * Extract CPU vendor, family, model, stepping info from /proc/cpuinfo
  *
- * Returns 0 on success or a negativ error code
+ * Returns 0 on success or a negative error code
  * Only used on x86, below global's struct values are zero/unknown on
  * other archs
  */
-extern int get_cpu_info(unsigned int cpu, struct cpupower_cpu_info *cpu_info);
+extern int get_cpu_info(struct cpupower_cpu_info *cpu_info);
 extern struct cpupower_cpu_info cpupower_cpu_info;
 /* cpuid and cpuinfo helpers  **************************/
 
diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c
index 601d719d4e60..a5e7ddf19dbd 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -13,7 +13,7 @@ int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
 
 	*support = *active = *states = 0;
 
-	ret = get_cpu_info(0, &cpu_info);
+	ret = get_cpu_info(&cpu_info);
 	if (ret)
 		return ret;
 
diff --git a/tools/power/cpupower/utils/idle_monitor/hsw_ext_idle.c b/tools/power/cpupower/utils/idle_monitor/hsw_ext_idle.c
index ebeaba6571a3..f794d6bbb7e9 100644
--- a/tools/power/cpupower/utils/idle_monitor/hsw_ext_idle.c
+++ b/tools/power/cpupower/utils/idle_monitor/hsw_ext_idle.c
@@ -123,7 +123,7 @@ static int hsw_ext_start(void)
 			previous_count[num][cpu] = val;
 		}
 	}
-	hsw_ext_get_count(TSC, &tsc_at_measure_start, 0);
+	hsw_ext_get_count(TSC, &tsc_at_measure_start, base_cpu);
 	return 0;
 }
 
@@ -132,7 +132,7 @@ static int hsw_ext_stop(void)
 	unsigned long long val;
 	int num, cpu;
 
-	hsw_ext_get_count(TSC, &tsc_at_measure_end, 0);
+	hsw_ext_get_count(TSC, &tsc_at_measure_end, base_cpu);
 
 	for (num = 0; num < HSW_EXT_CSTATE_COUNT; num++) {
 		for (cpu = 0; cpu < cpu_count; cpu++) {
diff --git a/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c b/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c
index c83f1606970b..d7c2a6d13dea 100644
--- a/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c
+++ b/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c
@@ -80,7 +80,8 @@ static int *is_valid;
 static int mperf_get_tsc(unsigned long long *tsc)
 {
 	int ret;
-	ret = read_msr(0, MSR_TSC, tsc);
+
+	ret = read_msr(base_cpu, MSR_TSC, tsc);
 	if (ret)
 		dprint("Reading TSC MSR failed, returning %llu\n", *tsc);
 	return ret;
diff --git a/tools/power/cpupower/utils/idle_monitor/nhm_idle.c b/tools/power/cpupower/utils/idle_monitor/nhm_idle.c
index d2a91dd0d563..abf8cb5f7349 100644
--- a/tools/power/cpupower/utils/idle_monitor/nhm_idle.c
+++ b/tools/power/cpupower/utils/idle_monitor/nhm_idle.c
@@ -129,7 +129,7 @@ static int nhm_start(void)
 	int num, cpu;
 	unsigned long long dbg, val;
 
-	nhm_get_count(TSC, &tsc_at_measure_start, 0);
+	nhm_get_count(TSC, &tsc_at_measure_start, base_cpu);
 
 	for (num = 0; num < NHM_CSTATE_COUNT; num++) {
 		for (cpu = 0; cpu < cpu_count; cpu++) {
@@ -137,7 +137,7 @@ static int nhm_start(void)
 			previous_count[num][cpu] = val;
 		}
 	}
-	nhm_get_count(TSC, &dbg, 0);
+	nhm_get_count(TSC, &dbg, base_cpu);
 	dprint("TSC diff: %llu\n", dbg - tsc_at_measure_start);
 	return 0;
 }
@@ -148,7 +148,7 @@ static int nhm_stop(void)
 	unsigned long long dbg;
 	int num, cpu;
 
-	nhm_get_count(TSC, &tsc_at_measure_end, 0);
+	nhm_get_count(TSC, &tsc_at_measure_end, base_cpu);
 
 	for (num = 0; num < NHM_CSTATE_COUNT; num++) {
 		for (cpu = 0; cpu < cpu_count; cpu++) {
@@ -156,7 +156,7 @@ static int nhm_stop(void)
 			current_count[num][cpu] = val;
 		}
 	}
-	nhm_get_count(TSC, &dbg, 0);
+	nhm_get_count(TSC, &dbg, base_cpu);
 	dprint("TSC diff: %llu\n", dbg - tsc_at_measure_end);
 
 	return 0;
diff --git a/tools/power/cpupower/utils/idle_monitor/snb_idle.c b/tools/power/cpupower/utils/idle_monitor/snb_idle.c
index efc8a69c9aba..a2b45219648d 100644
--- a/tools/power/cpupower/utils/idle_monitor/snb_idle.c
+++ b/tools/power/cpupower/utils/idle_monitor/snb_idle.c
@@ -120,7 +120,7 @@ static int snb_start(void)
 			previous_count[num][cpu] = val;
 		}
 	}
-	snb_get_count(TSC, &tsc_at_measure_start, 0);
+	snb_get_count(TSC, &tsc_at_measure_start, base_cpu);
 	return 0;
 }
 
@@ -129,7 +129,7 @@ static int snb_stop(void)
 	unsigned long long val;
 	int num, cpu;
 
-	snb_get_count(TSC, &tsc_at_measure_end, 0);
+	snb_get_count(TSC, &tsc_at_measure_end, base_cpu);
 
 	for (num = 0; num < SNB_CSTATE_COUNT; num++) {
 		for (cpu = 0; cpu < cpu_count; cpu++) {