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/openbmc/linux/drivers/thermal/
H A Dcpuidle_cooling.c1 // SPDX-License-Identifier: GPL-2.0
21 * struct cpuidle_cooling_device - data for the idle cooling device
22 * @ii_dev: an atomic to keep track of the last task exiting the idle cycle
23 * @state: a normalized integer giving the state of the cooling device
27 unsigned long state; member
31 * cpuidle_cooling_runtime - Running time computation
32 * @idle_duration_us: CPU idle time to inject in microseconds
33 * @state: a percentile based number
35 * The running duration is computed from the idle injection duration
36 * which is fixed. If we reach 100% of idle injection ratio, that
[all …]
/openbmc/linux/drivers/cpuidle/
H A Ddt_idle_states.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * DT idle states parsing code.
9 #define pr_fmt(fmt) "DT idle-states: " fmt
29 * pointer of the passed in struct of_device_id array to the idle in init_state_node()
30 * state enter function. in init_state_node()
32 idle_state->enter = match_id->data; in init_state_node()
34 * Since this is not a "coupled" state, it's safe to assume interrupts in init_state_node()
38 idle_state->enter_s2idle = match_id->data; in init_state_node()
40 err = of_property_read_u32(state_node, "wakeup-latency-us", in init_state_node()
41 &idle_state->exit_latency); in init_state_node()
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H A Dcpuidle-powernv.c1 // SPDX-License-Identifier: GPL-2.0
3 * cpuidle-powernv - idle state cpuidle driver.
4 * Adapted from drivers/cpuidle/cpuidle-pseries
26 * Expose only those Hardware idle states via the cpuidle framework
32 .name = "powernv_idle",
58 for (i = index + 1; i < drv->state_count; i++) { in get_snooze_timeout()
59 if (dev->states_usage[i].disable) in get_snooze_timeout()
62 return drv->states[i].target_residency * tb_ticks_per_usec; in get_snooze_timeout()
79 dev->poll_time_limit = false; in snooze_loop()
90 dev->poll_time_limit = true; in snooze_loop()
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H A Dcpuidle-arm.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * ARM/ARM64 generic CPU idle driver.
25 * arm_enter_idle_state - Programs CPU to enter the specified state
29 * idx: state index
32 * specified target state selected by the governor.
38 * Pass idle state index to arm_cpuidle_suspend which in turn in arm_enter_idle_state()
39 * will call the CPU ops suspend protocol with idle index as a in arm_enter_idle_state()
46 .name = "arm_idle",
49 * State at index 0 is standby wfi and considered standard
51 * can't be used as "state 0", DT bindings must be implemented
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H A Dcpuidle-psci.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * PSCI CPU idle driver.
29 #include "cpuidle-psci.h"
41 void psci_set_domain_state(u32 state) in psci_set_domain_state() argument
43 __this_cpu_write(domain_state, state); in psci_set_domain_state()
56 u32 *states = data->psci_states; in __psci_enter_domain_idle_state()
57 struct device *pd_dev = data->dev; in __psci_enter_domain_idle_state()
58 u32 state; in __psci_enter_domain_idle_state() local
63 return -1; in __psci_enter_domain_idle_state()
71 state = psci_get_domain_state(); in __psci_enter_domain_idle_state()
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H A Dcpuidle-riscv-sbi.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * RISC-V SBI CPU idle driver.
9 #define pr_fmt(fmt) "cpuidle-riscv-sbi: " fmt
39 u32 state; member
48 static inline void sbi_set_domain_state(u32 state) in sbi_set_domain_state() argument
52 data->available = true; in sbi_set_domain_state()
53 data->state = state; in sbi_set_domain_state()
60 return data->state; in sbi_get_domain_state()
67 data->available = false; in sbi_clear_domain_state()
74 return data->available; in sbi_is_domain_state_available()
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H A Ddt_idle_genpd.c1 // SPDX-License-Identifier: GPL-2.0-only
12 #define pr_fmt(fmt) "dt-idle-genpd: " fmt
29 u32 state, *state_buf; in pd_parse_state_nodes() local
32 ret = parse_state(to_of_node(states[i].fwnode), &state); in pd_parse_state_nodes()
38 ret = -ENOMEM; in pd_parse_state_nodes()
41 *state_buf = state; in pd_parse_state_nodes()
48 i--; in pd_parse_state_nodes()
49 for (; i >= 0; i--) in pd_parse_state_nodes()
61 /* Parse the domain idle states. */ in pd_parse_states()
66 /* Fill out the dt specifics for each found state. */ in pd_parse_states()
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H A Dpoll_state.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * poll_state.c - Polling idle state
9 #include <linux/sched/idle.h>
20 dev->poll_time_limit = false; in poll_idle()
35 if (local_clock_noinstr() - time_start > limit) { in poll_idle()
36 dev->poll_time_limit = true; in poll_idle()
50 struct cpuidle_state *state = &drv->states[0]; in cpuidle_poll_state_init() local
52 snprintf(state->name, CPUIDLE_NAME_LEN, "POLL"); in cpuidle_poll_state_init()
53 snprintf(state->desc, CPUIDLE_DESC_LEN, "CPUIDLE CORE POLL IDLE"); in cpuidle_poll_state_init()
54 state->exit_latency = 0; in cpuidle_poll_state_init()
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/openbmc/linux/Documentation/devicetree/bindings/powerpc/opal/
H A Dpower-mgt.txt1 IBM Power-Management Bindings
5 idle states. The description of these idle states is exposed via the
6 node @power-mgt in the device-tree by the firmware.
9 ----------------
10 Typically each idle state has the following associated properties:
12 - name: The name of the idle state as defined by the firmware.
14 - flags: indicating some aspects of this idle states such as the
15 extent of state-loss, whether timebase is stopped on this
16 idle states and so on. The flag bits are as follows:
18 - exit-latency: The latency involved in transitioning the state of the
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/openbmc/linux/Documentation/admin-guide/pm/
H A Dcpuidle.rst1 .. SPDX-License-Identifier: GPL-2.0
8 CPU Idle Time Management
21 memory or executed. Those states are the *idle* states of the processor.
23 Since part of the processor hardware is not used in idle states, entering them
27 CPU idle time management is an energy-efficiency feature concerned about using
28 the idle states of processors for this purpose.
31 ------------
33 CPU idle time management operates on CPUs as seen by the *CPU scheduler* (that
37 software as individual single-core processors. In other words, a CPU is an
44 enter an idle state, that applies to the processor as a whole.
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H A Dintel_idle.rst1 .. SPDX-License-Identifier: GPL-2.0
5 ``intel_idle`` CPU Idle Time Management Driver
17 :doc:`CPU idle time management subsystem <cpuidle>` in the Linux kernel
18 (``CPUIdle``). It is the default CPU idle time management driver for the
24 Documentation/admin-guide/pm/cpuidle.rst if you have not done that yet.]
27 logical CPU executing it is idle and so it may be possible to put some of the
28 processor's functional blocks into low-power states. That instruction takes two
38 only way to pass early-configuration-time parameters to it is via the kernel
42 .. _intel-idle-enumeration-of-states:
44 Enumeration of Idle States
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/openbmc/linux/tools/power/cpupower/man/
H A Dcpupower-monitor.11 .TH CPUPOWER\-MONITOR "1" "22/02/2011" "" "cpupower Manual"
2 .SH NAME
3 cpupower\-monitor \- Report processor frequency and idle statistics
7 .RB "\-l"
10 .RB [ -c ] [ "\-m <mon1>," [ "<mon2>,..." ] ]
11 .RB [ "\-i seconds" ]
14 .RB [ -c ][ "\-m <mon1>," [ "<mon2>,..." ] ]
18 \fBcpupower-monitor \fP reports processor topology, frequency and idle power
19 state statistics. Either \fBcommand\fP is forked and
22 \fBcpupower-monitor \fP implements independent processor sleep state and
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H A Dcpupower-idle-set.11 .TH "CPUPOWER-IDLE-SET" "1" "0.1" "" "cpupower Manual"
2 .SH "NAME"
4 cpupower\-idle\-set \- Utility to set cpu idle state specific kernel options
7 cpupower [ \-c cpulist ] idle\-set [\fIoptions\fP]
10 The cpupower idle\-set subcommand allows to set cpu idle, also called cpu
11 sleep state, specific options offered by the kernel. One example is disabling
16 \fB\-d\fR \fB\-\-disable\fR <STATE_NO>
17 Disable a specific processor sleep state.
19 \fB\-e\fR \fB\-\-enable\fR <STATE_NO>
20 Enable a specific processor sleep state.
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H A Dcpupower-idle-info.11 .TH "CPUPOWER-IDLE-INFO" "1" "0.1" "" "cpupower Manual"
2 .SH "NAME"
4 cpupower\-idle\-info \- Utility to retrieve cpu idle kernel information
7 cpupower [ \-c cpulist ] idle\-info [\fIoptions\fP]
10 A tool which prints out per cpu idle information helpful to developers and interested users.
14 \fB\-f\fR \fB\-\-silent\fR
15 Only print a summary of all available C-states in the system.
17 \fB\-e\fR \fB\-\-proc\fR
19 Prints out idle information in old /proc/acpi/processor/*/power format. This
23 .SH IDLE\-INFO DESCRIPTIONS
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/openbmc/linux/arch/arm/mach-omap2/
H A Dcpuidle34xx.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-omap2/cpuidle34xx.c
5 * OMAP3 CPU IDLE Routines
11 * Karthik Dasu <karthik-dp@ti.com>
17 * Richard Woodruff <r-woodruff2@ti.com>
36 /* Mach specific information to be recorded in the C-state driver_data */
53 * entering idle.
65 /* In C1 do not allow PER state lower than CORE state */
102 * omap3_enter_idle - Programs OMAP3 to enter the specified state
105 * @index: the index of state to be entered
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H A Dclockdomain.h1 /* SPDX-License-Identifier: GPL-2.0-only */
6 * Copyright (C) 2008-2011 Nokia Corporation
29 * CLKDM_MISSING_IDLE_REPORTING: The idle status of the IP blocks and
31 * the PRCM when determining whether the clockdomain is idle.
33 * hardware-supervised idle mode, the PRCM may transition the
34 * enclosing powerdomain to a low power state, even when devices
38 * force-sleep mode, then the HW_AUTO mode will be used to put the
40 * the force-wakeup mode, then it will be used whenever a clock or
57 * struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode
58 * @clkdm: clockdomain to add wkdep+sleepdep on - set name member only
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/openbmc/qemu/python/tests/
H A Dprotocol.py35 def __init__(self, name=None): argument
38 super().__init__(name)
65 async def _do_recv(self) -> None:
69 def _do_send(self, msg: None) -> None:
72 async def send_msg(self) -> None:
75 async def simulate_disconnect(self) -> None:
77 Simulates a bottom-half disconnect.
81 state without fully quiescing it back to IDLE. This is normally
88 returns bottom half errors as a pre-condition to allowing the
89 loop to return back to IDLE.
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/openbmc/linux/drivers/idle/
H A Dintel_idle.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * intel_idle.c - native hardware idle loop for modern Intel processors
5 * Copyright (c) 2013 - 2020, Intel Corporation.
20 * All CPUs have same idle states as boot CPU
23 * for preventing entry into deep C-states
25 * CPU will flush caches as needed when entering a C-state via MWAIT
33 * ACPI has a .suspend hack to turn off deep c-statees during suspend
39 /* un-comment DEBUG to enable pr_debug() statements */
55 #include <asm/intel-family.h>
56 #include <asm/nospec-branch.h>
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/openbmc/linux/Documentation/driver-api/pm/
H A Dcpuidle.rst1 .. SPDX-License-Identifier: GPL-2.0
5 CPU Idle Time Management
13 CPU Idle Time Management Subsystem
18 cores) is idle after an interrupt or equivalent wakeup event, which means that
19 there are no tasks to run on it except for the special "idle" task associated
21 belongs to. That can be done by making the idle logical CPU stop fetching
23 depended on by it into an idle state in which they will draw less power.
25 However, there may be multiple different idle states that can be used in such a
28 particular idle state. That is the role of the CPU idle time management
35 units: *governors* responsible for selecting idle states to ask the processor
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/openbmc/linux/drivers/gpu/drm/i915/gt/
H A Dselftest_context.c1 // SPDX-License-Identifier: GPL-2.0
26 rq->sched.attr.priority = I915_PRIORITY_BARRIER; in request_sync()
35 lockdep_unpin_lock(&tl->mutex, rq->cookie); in request_sync()
36 mutex_unlock(&tl->mutex); in request_sync()
46 struct intel_timeline *tl = ce->timeline; in context_sync()
49 mutex_lock(&tl->mutex); in context_sync()
54 if (list_empty(&tl->requests)) in context_sync()
57 rq = list_last_entry(&tl->requests, typeof(*rq), link); in context_sync()
68 mutex_unlock(&tl->mutex); in context_sync()
71 i915_active_unlock_wait(&ce->active); in context_sync()
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/openbmc/openbmc/poky/scripts/pybootchartgui/pybootchartgui/
H A Dparsing.py60 … raise ParseError("empty state: '%s' does not contain a valid bootchart" % ", ".join(paths))
74 self.duration = self.end_time - self.start_time
85 # Crop the chart to the end of the first idle period after the given
88 idle = self.crop (writer, options.crop_after)
90 idle = None
93 self.times = [ idle ]
107 options.prune, idle, self.taskstats,
162 # re-parent any stray orphans if we can
183 k = min(k, len(util)-1)
188 avgload = sum(u[1] for u in util[j:k+1]) / (k-j+1)
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/openbmc/qemu/python/qemu/qmp/
H A Dprotocol.py2 Generic Asynchronous Message-based Protocol Support
14 # pylint: disable=too-many-lines
51 _TaskFN = Callable[[], Awaitable[None]] # aka ``async def func() -> None``
62 IDLE = 0 variable in Runstate
68 #: Runstate may be returned to `IDLE` by calling `disconnect()`.
79 :param error_message: Human-readable string describing the error.
80 :param exc: The root-cause exception.
84 #: Human-readable error string
89 def __str__(self) -> str:
92 # If there's no error string, use the exception name.
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/openbmc/linux/Documentation/devicetree/bindings/cpu/
H A Didle-states.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/cpu/idle-states.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Idle states
10 - Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
11 - Anup Patel <anup@brainfault.org>
15 1 - Introduction
18 ARM and RISC-V systems contain HW capable of managing power consumption
19 dynamically, where cores can be put in different low-power states (ranging
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/openbmc/entity-manager/schemas/
H A Dibm.json2 "$schema": "http://json-schema.org/draft-07/schema#",
6 …dpoint and a GPIO for IBM CFF power supplies. In the entity-manager detector-configuration-reacto…
9 "Name": { object
24 … "description": "The name of the GPIO to monitor that indicates CFFPS plug state.",
29 "Name",
38 …-like compatibility strings for systems, where a 'system' is roughly defined as the combination of…
41 "Name": { object
52 "ibm,blueridge-1s4u",
53 "ibm,blueridge-2u",
54 "ibm,blueridge-4u",
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/openbmc/linux/arch/arm64/boot/dts/qcom/
H A Dsdm845-cheza.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
8 #include <dt-bindings/input/input.h>
9 #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
25 stdout-path = "serial0:115200n8";
29 compatible = "pwm-backlight";
31 enable-gpios = <&tlmm 37 GPIO_ACTIVE_HIGH>;
32 power-supply = <&ppvar_sys>;
33 pinctrl-names = "default";
34 pinctrl-0 = <&ap_edp_bklten>;
37 /* FIXED REGULATORS - parents above children */
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