Merge tag 'pm+acpi-3.15-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI and power management fixes and updates from Rafael Wysocki:
 "This is PM and ACPI material that has emerged over the last two weeks
  and one fix for a CPU hotplug regression introduced by the recent CPU
  hotplug notifiers registration series.

  Included are intel_idle and turbostat updates from Len Brown (these
  have been in linux-next for quite some time), a new cpufreq driver for
  powernv (that might spend some more time in linux-next, but BenH was
  asking me so nicely to push it for 3.15 that I couldn't resist), some
  cpufreq fixes and cleanups (including fixes for some silly breakage in
  a couple of cpufreq drivers introduced during the 3.14 cycle),
  assorted ACPI cleanups, wakeup framework documentation fixes, a new
  sysfs attribute for cpuidle and a new command line argument for power
  domains diagnostics.

  Specifics:

   - Fix for a recently introduced CPU hotplug regression in ARM KVM
     from Ming Lei.

   - Fixes for breakage in the at32ap, loongson2_cpufreq, and unicore32
     cpufreq drivers introduced during the 3.14 cycle (-stable material)
     from Chen Gang and Viresh Kumar.

   - New powernv cpufreq driver from Vaidyanathan Srinivasan, with bits
     from Gautham R Shenoy and Srivatsa S Bhat.

   - Exynos cpufreq driver fix preventing it from being included into
     multiplatform builds that aren't supported by it from Sachin Kamat.

   - cpufreq cleanups related to the usage of the driver_data field in
     struct cpufreq_frequency_table from Viresh Kumar.

   - cpufreq ppc driver cleanup from Sachin Kamat.

   - Intel BayTrail support for intel_idle and ACPI idle from Len Brown.

   - Intel CPU model 54 (Atom N2000 series) support for intel_idle from
     Jan Kiszka.

   - intel_idle fix for Intel Ivy Town residency targets from Len Brown.

   - turbostat updates (Intel Broadwell support and output cleanups)
     from Len Brown.

   - New cpuidle sysfs attribute for exporting C-states' target
     residency information to user space from Daniel Lezcano.

   - New kernel command line argument to prevent power domains enabled
     by the bootloader from being turned off even if they are not in use
     (for diagnostics purposes) from Tushar Behera.

   - Fixes for wakeup sysfs attributes documentation from Geert
     Uytterhoeven.

   - New ACPI video blacklist entry for ThinkPad Helix from Stephen
     Chandler Paul.

   - Assorted ACPI cleanups and a Kconfig help update from Jonghwan
     Choi, Zhihui Zhang, Hanjun Guo"

* tag 'pm+acpi-3.15-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (28 commits)
  ACPI: Update the ACPI spec information in Kconfig
  arm, kvm: fix double lock on cpu_add_remove_lock
  cpuidle: sysfs: Export target residency information
  cpufreq: ppc: Remove duplicate inclusion of fsl_soc.h
  cpufreq: create another field .flags in cpufreq_frequency_table
  cpufreq: use kzalloc() to allocate memory for cpufreq_frequency_table
  cpufreq: don't print value of .driver_data from core
  cpufreq: ia64: don't set .driver_data to index
  cpufreq: powernv: Select CPUFreq related Kconfig options for powernv
  cpufreq: powernv: Use cpufreq_frequency_table.driver_data to store pstate ids
  cpufreq: powernv: cpufreq driver for powernv platform
  cpufreq: at32ap: don't declare local variable as static
  cpufreq: loongson2_cpufreq: don't declare local variable as static
  cpufreq: unicore32: fix typo issue for 'clk'
  cpufreq: exynos: Disable on multiplatform build
  PM / wakeup: Correct presence vs. emptiness of wakeup_* attributes
  PM / domains: Add pd_ignore_unused to keep power domains enabled
  ACPI / dock: Drop dock_device_ids[] table
  ACPI / video: Favor native backlight interface for ThinkPad Helix
  ACPI / thermal: Fix wrong variable usage in debug statement
  ...

Documentation/ABI/testing/sysfs-devices-power

@@ -83,8 +83,10 @@ Contact:	Rafael J. Wysocki <rjw@rjwysocki.net>
 Description:
 		The /sys/devices/.../wakeup_count attribute contains the number
 		of signaled wakeup events associated with the device.  This
-		attribute is read-only.  If the device is not enabled to wake up
+		attribute is read-only.  If the device is not capable to wake up
 		the system from sleep states, this attribute is not present.
+		If the device is not enabled to wake up the system from sleep
+		states, this attribute is empty.
 
 What:		/sys/devices/.../power/wakeup_active_count
 Date:		September 2010
@@ -93,8 +95,10 @@ Description:
 		The /sys/devices/.../wakeup_active_count attribute contains the
 		number of times the processing of wakeup events associated with
 		the device was completed (at the kernel level).  This attribute
-		is read-only.  If the device is not enabled to wake up the
-		system from sleep states, this attribute is not present.
+		is read-only.  If the device is not capable to wake up the
+		system from sleep states, this attribute is not present.  If
+		the device is not enabled to wake up the system from sleep
+		states, this attribute is empty.
 
 What:		/sys/devices/.../power/wakeup_abort_count
 Date:		February 2012
@@ -104,8 +108,9 @@ Description:
 		number of times the processing of a wakeup event associated with
 		the device might have aborted system transition into a sleep
 		state in progress.  This attribute is read-only.  If the device
-		is not enabled to wake up the system from sleep states, this
-		attribute is not present.
+		is not capable to wake up the system from sleep states, this
+		attribute is not present.  If the device is not enabled to wake
+		up the system from sleep states, this attribute is empty.
 
 What:		/sys/devices/.../power/wakeup_expire_count
 Date:		February 2012
@@ -114,8 +119,10 @@ Description:
 		The /sys/devices/.../wakeup_expire_count attribute contains the
 		number of times a wakeup event associated with the device has
 		been reported with a timeout that expired.  This attribute is
-		read-only.  If the device is not enabled to wake up the system
-		from sleep states, this attribute is not present.
+		read-only.  If the device is not capable to wake up the system
+		from sleep states, this attribute is not present.  If the
+		device is not enabled to wake up the system from sleep states,
+		this attribute is empty.
 
 What:		/sys/devices/.../power/wakeup_active
 Date:		September 2010
@@ -124,8 +131,10 @@ Description:
 		The /sys/devices/.../wakeup_active attribute contains either 1,
 		or 0, depending on whether or not a wakeup event associated with
 		the device is being processed (1).  This attribute is read-only.
-		If the device is not enabled to wake up the system from sleep
-		states, this attribute is not present.
+		If the device is not capable to wake up the system from sleep
+		states, this attribute is not present.  If the device is not
+		enabled to wake up the system from sleep states, this attribute
+		is empty.
 
 What:		/sys/devices/.../power/wakeup_total_time_ms
 Date:		September 2010
@@ -134,8 +143,9 @@ Description:
 		The /sys/devices/.../wakeup_total_time_ms attribute contains
 		the total time of processing wakeup events associated with the
 		device, in milliseconds.  This attribute is read-only.  If the
-		device is not enabled to wake up the system from sleep states,
-		this attribute is not present.
+		device is not capable to wake up the system from sleep states,
+		this attribute is not present.  If the device is not enabled to
+		wake up the system from sleep states, this attribute is empty.
 
 What:		/sys/devices/.../power/wakeup_max_time_ms
 Date:		September 2010
@@ -144,8 +154,10 @@ Description:
 		The /sys/devices/.../wakeup_max_time_ms attribute contains
 		the maximum time of processing a single wakeup event associated
 		with the device, in milliseconds.  This attribute is read-only.
-		If the device is not enabled to wake up the system from sleep
-		states, this attribute is not present.
+		If the device is not capable to wake up the system from sleep
+		states, this attribute is not present.  If the device is not
+		enabled to wake up the system from sleep states, this attribute
+		is empty.
 
 What:		/sys/devices/.../power/wakeup_last_time_ms
 Date:		September 2010
@@ -156,7 +168,8 @@ Description:
 		signaling the last wakeup event associated with the device, in
 		milliseconds.  This attribute is read-only.  If the device is
 		not enabled to wake up the system from sleep states, this
-		attribute is not present.
+		attribute is not present.  If the device is not enabled to wake
+		up the system from sleep states, this attribute is empty.
 
 What:		/sys/devices/.../power/wakeup_prevent_sleep_time_ms
 Date:		February 2012
@@ -165,9 +178,10 @@ Description:
 		The /sys/devices/.../wakeup_prevent_sleep_time_ms attribute
 		contains the total time the device has been preventing
 		opportunistic transitions to sleep states from occurring.
-		This attribute is read-only.  If the device is not enabled to
+		This attribute is read-only.  If the device is not capable to
 		wake up the system from sleep states, this attribute is not
-		present.
+		present.  If the device is not enabled to wake up the system
+		from sleep states, this attribute is empty.
 
 What:		/sys/devices/.../power/autosuspend_delay_ms
 Date:		September 2010

Documentation/kernel-parameters.txt

@@ -2563,6 +2563,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
 	pcmv=		[HW,PCMCIA] BadgePAD 4
 
+	pd_ignore_unused
+			[PM]
+			Keep all power-domains already enabled by bootloader on,
+			even if no driver has claimed them. This is useful
+			for debug and development, but should not be
+			needed on a platform with proper driver support.
+
 	pd.		[PARIDE]
 			See Documentation/blockdev/paride.txt.
 

arch/mips/loongson/lemote-2f/clock.c

@@ -28,16 +28,16 @@ enum {
 };
 
 struct cpufreq_frequency_table loongson2_clockmod_table[] = {
-	{DC_RESV, CPUFREQ_ENTRY_INVALID},
-	{DC_ZERO, CPUFREQ_ENTRY_INVALID},
-	{DC_25PT, 0},
-	{DC_37PT, 0},
-	{DC_50PT, 0},
-	{DC_62PT, 0},
-	{DC_75PT, 0},
-	{DC_87PT, 0},
-	{DC_DISABLE, 0},
-	{DC_RESV, CPUFREQ_TABLE_END},
+	{0, DC_RESV, CPUFREQ_ENTRY_INVALID},
+	{0, DC_ZERO, CPUFREQ_ENTRY_INVALID},
+	{0, DC_25PT, 0},
+	{0, DC_37PT, 0},
+	{0, DC_50PT, 0},
+	{0, DC_62PT, 0},
+	{0, DC_75PT, 0},
+	{0, DC_87PT, 0},
+	{0, DC_DISABLE, 0},
+	{0, DC_RESV, CPUFREQ_TABLE_END},
 };
 EXPORT_SYMBOL_GPL(loongson2_clockmod_table);
 

arch/powerpc/configs/pseries_defconfig

@@ -306,3 +306,4 @@ CONFIG_KVM_BOOK3S_64=m
 CONFIG_KVM_BOOK3S_64_HV=y
 CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y

arch/powerpc/configs/pseries_le_defconfig

@@ -301,3 +301,4 @@ CONFIG_CRYPTO_LZO=m
 # CONFIG_CRYPTO_ANSI_CPRNG is not set
 CONFIG_CRYPTO_DEV_NX=y
 CONFIG_CRYPTO_DEV_NX_ENCRYPT=m
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y

arch/powerpc/include/asm/reg.h

@@ -272,6 +272,10 @@
 #define SPRN_HSRR1	0x13B	/* Hypervisor Save/Restore 1 */
 #define SPRN_IC		0x350	/* Virtual Instruction Count */
 #define SPRN_VTB	0x351	/* Virtual Time Base */
+#define SPRN_PMICR	0x354   /* Power Management Idle Control Reg */
+#define SPRN_PMSR	0x355   /* Power Management Status Reg */
+#define SPRN_PMCR	0x374	/* Power Management Control Register */
+
 /* HFSCR and FSCR bit numbers are the same */
 #define FSCR_TAR_LG	8	/* Enable Target Address Register */
 #define FSCR_EBB_LG	7	/* Enable Event Based Branching */

arch/powerpc/platforms/powernv/Kconfig

@@ -11,6 +11,12 @@ config PPC_POWERNV
 	select PPC_UDBG_16550
 	select PPC_SCOM
 	select ARCH_RANDOM
+	select CPU_FREQ
+	select CPU_FREQ_GOV_PERFORMANCE
+	select CPU_FREQ_GOV_POWERSAVE
+	select CPU_FREQ_GOV_USERSPACE
+	select CPU_FREQ_GOV_ONDEMAND
+	select CPU_FREQ_GOV_CONSERVATIVE
 	default y
 
 config PPC_POWERNV_RTAS

arch/x86/kernel/acpi/cstate.c

@@ -87,7 +87,9 @@ static long acpi_processor_ffh_cstate_probe_cpu(void *_cx)
 	num_cstate_subtype = edx_part & MWAIT_SUBSTATE_MASK;
 
 	retval = 0;
-	if (num_cstate_subtype < (cx->address & MWAIT_SUBSTATE_MASK)) {
+	/* If the HW does not support any sub-states in this C-state */
+	if (num_cstate_subtype == 0) {
+		pr_warn(FW_BUG "ACPI MWAIT C-state 0x%x not supported by HW (0x%x)\n", cx->address, edx_part);
 		retval = -1;
 		goto out;
 	}

drivers/acpi/Kconfig

@@ -31,10 +31,14 @@ menuconfig ACPI
 	  ACPI CA, see:
 	  <http://acpica.org/>
 
-	  ACPI is an open industry specification co-developed by
-	  Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba.
+	  ACPI is an open industry specification originally co-developed by
+	  Hewlett-Packard, Intel, Microsoft, Phoenix, and Toshiba. Currently,
+	  it is developed by the ACPI Specification Working Group (ASWG) under
+	  the UEFI Forum and any UEFI member can join the ASWG and contribute
+	  to the ACPI specification.
 	  The specification is available at:
 	  <http://www.acpi.info>
+	  <http://www.uefi.org/acpi/specs>
 
 if ACPI
 

drivers/acpi/dock.c

@@ -51,12 +51,6 @@ MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to "
 	" the driver to wait for userspace to write the undock sysfs file "
 	" before undocking");
 
-static const struct acpi_device_id dock_device_ids[] = {
-	{"LNXDOCK", 0},
-	{"", 0},
-};
-MODULE_DEVICE_TABLE(acpi, dock_device_ids);
-
 struct dock_station {
 	acpi_handle handle;
 	unsigned long last_dock_time;

drivers/acpi/osl.c

@@ -1219,10 +1219,9 @@ acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
 {
 	struct semaphore *sem = NULL;
 
-	sem = acpi_os_allocate(sizeof(struct semaphore));
+	sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
 	if (!sem)
 		return AE_NO_MEMORY;
-	memset(sem, 0, sizeof(struct semaphore));
 
 	sema_init(sem, initial_units);
 

drivers/acpi/thermal.c

@@ -344,7 +344,7 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 			tz->trips.hot.flags.valid = 1;
 			ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 					"Found hot threshold [%lu]\n",
-					tz->trips.critical.temperature));
+					tz->trips.hot.temperature));
 		}
 	}
 

drivers/acpi/utils.c

@@ -164,11 +164,10 @@ acpi_extract_package(union acpi_object *package,
 	 * Validate output buffer.
 	 */
 	if (buffer->length == ACPI_ALLOCATE_BUFFER) {
-		buffer->pointer = ACPI_ALLOCATE(size_required);
+		buffer->pointer = ACPI_ALLOCATE_ZEROED(size_required);
 		if (!buffer->pointer)
 			return AE_NO_MEMORY;
 		buffer->length = size_required;
-		memset(buffer->pointer, 0, size_required);
 	} else {
 		if (buffer->length < size_required) {
 			buffer->length = size_required;

drivers/acpi/video.c

@@ -487,6 +487,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
 		DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"),
 		},
 	},
+	{
+	.callback = video_set_use_native_backlight,
+	.ident = "Thinkpad Helix",
+	.matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+		DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"),
+		},
+	},
 	{
 	 .callback = video_set_use_native_backlight,
 	 .ident = "Dell Inspiron 7520",

drivers/base/power/domain.c

@@ -705,6 +705,14 @@ static int pm_genpd_runtime_resume(struct device *dev)
 	return 0;
 }
 
+static bool pd_ignore_unused;
+static int __init pd_ignore_unused_setup(char *__unused)
+{
+	pd_ignore_unused = true;
+	return 1;
+}
+__setup("pd_ignore_unused", pd_ignore_unused_setup);
+
 /**
  * pm_genpd_poweroff_unused - Power off all PM domains with no devices in use.
  */
@@ -712,6 +720,11 @@ void pm_genpd_poweroff_unused(void)
 {
 	struct generic_pm_domain *genpd;
 
+	if (pd_ignore_unused) {
+		pr_warn("genpd: Not disabling unused power domains\n");
+		return;
+	}
+
 	mutex_lock(&gpd_list_lock);
 
 	list_for_each_entry(genpd, &gpd_list, gpd_list_node)

drivers/cpufreq/Kconfig.arm

@@ -30,7 +30,7 @@ config ARM_EXYNOS_CPUFREQ
 
 config ARM_EXYNOS4210_CPUFREQ
 	bool "SAMSUNG EXYNOS4210"
-	depends on CPU_EXYNOS4210
+	depends on CPU_EXYNOS4210 && !ARCH_MULTIPLATFORM
 	default y
 	select ARM_EXYNOS_CPUFREQ
 	help
@@ -41,7 +41,7 @@ config ARM_EXYNOS4210_CPUFREQ
 
 config ARM_EXYNOS4X12_CPUFREQ
 	bool "SAMSUNG EXYNOS4x12"
-	depends on (SOC_EXYNOS4212 || SOC_EXYNOS4412)
+	depends on (SOC_EXYNOS4212 || SOC_EXYNOS4412) && !ARCH_MULTIPLATFORM
 	default y
 	select ARM_EXYNOS_CPUFREQ
 	help
@@ -52,7 +52,7 @@ config ARM_EXYNOS4X12_CPUFREQ
 
 config ARM_EXYNOS5250_CPUFREQ
 	bool "SAMSUNG EXYNOS5250"
-	depends on SOC_EXYNOS5250
+	depends on SOC_EXYNOS5250 && !ARCH_MULTIPLATFORM
 	default y
 	select ARM_EXYNOS_CPUFREQ
 	help

drivers/cpufreq/Kconfig.powerpc

@@ -54,3 +54,11 @@ config PPC_PASEMI_CPUFREQ
 	help
 	  This adds the support for frequency switching on PA Semi
 	  PWRficient processors.
+
+config POWERNV_CPUFREQ
+       tristate "CPU frequency scaling for IBM POWERNV platform"
+       depends on PPC_POWERNV
+       default y
+       help
+	 This adds support for CPU frequency switching on IBM POWERNV
+	 platform

drivers/cpufreq/Makefile

@@ -86,6 +86,7 @@ obj-$(CONFIG_PPC_CORENET_CPUFREQ)   += ppc-corenet-cpufreq.o
 obj-$(CONFIG_CPU_FREQ_PMAC)		+= pmac32-cpufreq.o
 obj-$(CONFIG_CPU_FREQ_PMAC64)		+= pmac64-cpufreq.o
 obj-$(CONFIG_PPC_PASEMI_CPUFREQ)	+= pasemi-cpufreq.o
+obj-$(CONFIG_POWERNV_CPUFREQ)		+= powernv-cpufreq.o
 
 ##################################################################################
 # Other platform drivers

drivers/cpufreq/acpi-cpufreq.c

@@ -754,7 +754,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
 		goto err_unreg;
 	}
 
-	data->freq_table = kmalloc(sizeof(*data->freq_table) *
+	data->freq_table = kzalloc(sizeof(*data->freq_table) *
 		    (perf->state_count+1), GFP_KERNEL);
 	if (!data->freq_table) {
 		result = -ENOMEM;

drivers/cpufreq/at32ap-cpufreq.c

@@ -52,7 +52,7 @@ static int at32_set_target(struct cpufreq_policy *policy, unsigned int index)
 static int at32_cpufreq_driver_init(struct cpufreq_policy *policy)
 {
 	unsigned int frequency, rate, min_freq;
-	static struct clk *cpuclk;
+	struct clk *cpuclk;
 	int retval, steps, i;
 
 	if (policy->cpu != 0)