| /linux/Documentation/admin-guide/pm/ |
| H A D | intel_pstate.rst | 1 .. SPDX-License-Identifier: GPL-2.0
22 Documentation/admin-guide/pm/cpufreq.rst if you have not done that yet.]
24 For the processors supported by ``intel_pstate``, the P-state concept is broader
27 information about that). For this reason, the representation of P-states used
32 ``intel_pstate`` maps its internal representation of P-states to frequencies too
38 Since the hardware P-state selection interface used by ``intel_pstate`` is
43 time the corresponding CPU is taken offline and need to be re-initialized when
47 only way to pass early-configuration-time parameters to it is via the kernel
66 -----------
69 hardware-managed P-states (HWP) support. If it works in this mode, the
[all …]
|
| H A D | cpufreq.rst | 1 .. SPDX-License-Identifier: GPL-2.0
20 Operating Performance Points or P-states (in ACPI terminology). As a rule,
24 time (or the more power is drawn) by the CPU in the given P-state. Therefore
29 as possible and then there is no reason to use any P-states different from the
30 highest one (i.e. the highest-performance frequency/voltage configuration
38 put into different P-states.
41 capacity, so as to decide which P-states to put the CPUs into. Of course, since
64 information on the available P-states (or P-state ranges in some cases) and
65 access platform-specific hardware interfaces to change CPU P-states as requested
70 performance scaling algorithms for P-state selection can be represented in a
[all …]
|
| H A D | amd-pstate.rst | 1 .. SPDX-License-Identifier: GPL-2.0
5 ``amd-pstate`` CPU Performance Scaling Driver
16 ``amd-pstate`` is the AMD CPU performance scaling driver that introduces a
20 than legacy ACPI hardware P-States. Current AMD CPU/APU platforms are using
21 the ACPI P-states driver to manage CPU frequency and clocks with switching
22 only in 3 P-states. CPPC replaces the ACPI P-states controls and allows a
23 flexible, low-latency interface for the Linux kernel to directly
26 ``amd-pstate`` leverages the Linux kernel governors such as ``schedutil``,
30 Volume 2: System Programming [1]_). Currently, ``amd-pstate`` supports basic
40 continuous, abstract, and unit-less performance value in a scale that is
[all …]
|
| /linux/arch/arm64/kvm/hyp/include/nvhe/ |
| H A D | memory.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
11 * Bits 0-1 are used to encode the memory ownership state of each page from the
19 * hyp_vmemmap for the host and hyp states or in PTE software bits for guests.
27 * 'Meta-states' are not stored directly in PTE SW bits for guest
28 * states, but inferred from the context (e.g. invalid PTE entries).
29 * For the host and hyp, meta-states are stored directly in the
54 /* Host state. Guarded by the host stage-2 lock. */
58 * Complement of the hyp state. Guarded by the hyp stage-1 lock. We use
70 #define __hyp_va(phys) ((void *)((phys_addr_t)(phys) - hyp_physvirt_offset))
94 #define hyp_page_to_pfn(page) ((struct hyp_page *)(page) - hyp_vmemmap)
[all …]
|
| /linux/tools/power/cpupower/man/ |
| H A D | cpupower-set.1 | 1 .TH CPUPOWER\-SET "1" "22/02/2011" "" "cpupower Manual"
3 cpupower\-set \- Set processor power related kernel or hardware configurations
6 .B cpupower set [ \-b VAL | \-e POLICY | \-m MODE | \-t BOOL ]
15 described in the cpupower(1) manpage in the \-\-cpu option section. Whether an
24 \-\-perf-bias, \-b
30 The range of valid numbers is 0-15, where 0 is maximum
33 The processor uses this information in model-specific ways
34 when it must select trade-offs between performance and
37 This policy hint does not supersede Processor Performance states
38 (P-states) or CPU Idle power states (C-states), but allows
[all …]
|
| /linux/tools/power/x86/x86_energy_perf_policy/ |
| H A D | x86_energy_perf_policy.8 | 1 .\" This page Copyright (C) 2010 - 2015 Len Brown <len.brown@intel.com>
5 x86_energy_perf_policy \- Manage Energy vs. Performance Policy
10 .RB "scope: \-\-cpu\ cpu-list | \-\-pkg\ pkg-list"
12 .RB "cpu-list, pkg-lis
[all...] |
| /linux/drivers/firmware/arm_scmi/ |
| H A D | powercap.c | 1 // SPDX-License-Identifier: GPL-2.0
8 #define pr_fmt(fmt) "SCMI Notifications POWERCAP - " fmt
118 #define THRESH_LOW(p, id) \ argument
119 (lower_32_bits((p)->states[(id)].thresholds))
120 #define THRESH_HIGH(p, id) \ argument
121 (upper_32_bits((p)->states[(id)].thresholds))
129 struct scmi_powercap_state *states; member
148 ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0, in scmi_powercap_attributes_get()
153 ret = ph->xops->do_xfer(ph, t); in scmi_powercap_attributes_get()
157 attributes = get_unaligned_le32(t->rx.buf); in scmi_powercap_attributes_get()
[all …]
|
| /linux/include/rv/ |
| H A D | ltl_monitor.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
28 task->comm, task->pid); in rv_cond_react()
43 return &task->rv[ltl_monitor_slot].ltl_mon; in ltl_get_monitor()
50 memset(&mon->states, 0, sizeof(mon->states)); in ltl_task_init()
53 __set_bit(i, mon->unknown_atoms); in ltl_task_init()
66 struct task_struct *g, *p; in ltl_monitor_init() local
79 for_each_process_thread(g, p) in ltl_monitor_init()
80 ltl_task_init(p, false); in ltl_monitor_init()
112 __clear_bit(atom, mon->unknown_atoms); in ltl_atom_set()
114 __set_bit(atom, mon->atoms); in ltl_atom_set()
[all …]
|
| /linux/tools/power/cpupower/bindings/python/ |
| H A D | test_raw_pylibcpupower.py | 2 # SPDX-License-Identifier: GPL-2.0-only
4 import raw_pylibcpupower as p namespace
11 cpu_cstates_count = p.cpuidle_state_count(0)
12 if cpu_cstates_count > -1:
13 print(f"CPU 0 has {cpu_cstates_count} c-states")
20 cstate_disabled = p.cpuidle_state_disable(0, 0, 1)
25 case -1:
27 case -2:
29 case -3:
30 print(f"No write access to disable/enable C-states: try using sudo")
[all …]
|
| /linux/drivers/xen/ |
| H A D | xen-acpi-processor.c | 1 // SPDX-License-Identifier: GPL-2.0-only
7 * https://lore.kernel.org/lkml/1322673664-14642-6-git-send-email-konrad.wilk@oracle.com
35 * - as those shrink to nr_cpu_bits (which is dependent on possible_cpu), which
40 /* Mutex to protect the acpi_ids_done - for CPU hotplug use. */
48 /* Which ACPI P-State dependencies for a enumerated processor */
56 .u.set_pminfo.id = _pr->acpi_id, in push_cxx_to_hypervisor()
64 dst_cx_states = kcalloc(_pr->power.count, in push_cxx_to_hypervisor()
67 return -ENOMEM; in push_cxx_to_hypervisor()
69 for (ok = 0, i = 1; i <= _pr->power.count; i++) { in push_cxx_to_hypervisor()
70 cx = &_pr->power.states[i]; in push_cxx_to_hypervisor()
[all …]
|
| /linux/tools/tracing/rtla/src/ |
| H A D | utils.c | 1 // SPDX-License-Identifier: GPL-2.0
27 * err_msg - print an error message to the stderr
42 * debug_msg - print a debug message to stderr if debug is set
60 * get_llong_from_str - get a long long int from a string
70 return -1; in get_llong_from_str()
76 * get_duration - fill output with a human readable duration since start_time
88 tm_info->tm_yday, in get_duration()
89 tm_info->tm_hour, in get_duration()
90 tm_info->tm_min, in get_duration()
91 tm_info->tm_sec); in get_duration()
[all …]
|
| /linux/arch/powerpc/include/asm/ |
| H A D | 8xx_immap.h | 10 * functional files.....but anyone else is welcome to try. -- Dan
95 /*-----------------------------------------------------------------------
96 * BR - Memory Controller: Base Register 16-9
107 #define BR_MS_GPCM 0x00000000 /* G.P.C.M. Machine Select */
108 #define BR_MS_UPMA 0x00000080 /* U.P.M.A Machine Select */
109 #define BR_MS_UPMB 0x000000c0 /* U.P.M.B Machine Select */
112 /*-----------------------------------------------------------------------
113 * OR - Memory Controller: Option Register 16-11
127 #define OR_SCY_0_CLK 0x00000000 /* 0 clock cycles wait states */
128 #define OR_SCY_1_CLK 0x00000010 /* 1 clock cycles wait states */
[all …]
|
| /linux/Documentation/admin-guide/thermal/ |
| H A D | intel_powerclamp.rst | 6 - Arjan van de Ven <arjan@linux.intel.com>
7 - Jacob Pan <jacob.jun.pan@linux.intel.com>
12 - Goals and Objectives
15 - Idle Injection
16 - Calibration
19 - Effectiveness and Limitations
20 - Power vs Performance
21 - Scalability
22 - Calibration
23 - Comparison with Alternative Techniques
[all …]
|
| /linux/drivers/acpi/ |
| H A D | processor_perflib.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * processor_perflib.c - ACPI Processor P-States Library ($Revision: 71 $)
9 * - Added processor hotplug support
39 * -1 -> cpufreq low level drivers not initialized -> _PSS, etc. not called yet
41 * 0 -> cpufreq low level drivers initialized -> consider _PPC values
42 * 1 -> ignore _PPC totally -> forced by user through boot param
44 static int ignore_ppc = -1;
60 return -EINVAL; in acpi_processor_get_platform_limit()
64 * (e.g. 0 = states 0..n; 1 = states 1..n; etc. in acpi_processor_get_platform_limit()
66 status = acpi_evaluate_integer(pr->handle, "_PPC", NULL, &ppc); in acpi_processor_get_platform_limit()
[all …]
|
| H A D | processor_idle.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * processor_idle - idle state submodule to the ACPI processor driver
9 * - Added processor hotplug support
11 * - Added support for C3 on SMP
33 * creating an empty asm-ia64/apic.h would just trade pest vs. cholera.
86 pr_notice("%s detected - limiting to C%ld max_cstate." in set_max_cstate()
87 " Override with \"processor.max_cstate=%d\"\n", id->ident, in set_max_cstate()
88 (long)id->driver_data, ACPI_PROCESSOR_MAX_POWER + 1); in set_max_cstate()
90 max_cstate = (long)id->driver_data; in set_max_cstate()
101 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
[all …]
|
| /linux/kernel/sched/ |
| H A D | membarrier.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2010-2017 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
24 * CPU1 after the IPI-induced memory barrier:
31 * b: send IPI IPI-induced mb
48 * before the IPI-induced memory barrier on CPU1.
70 * b: send IPI IPI-induced mb
82 * after the IPI-induced memory barrier on CPU1.
84 * C) Scheduling userspace thread -> kthread -> userspace thread vs membarrier
91 * b: read rq->curr->mm == NULL
112 * e: current->mm = NULL
[all …]
|
| /linux/net/sunrpc/auth_gss/ |
| H A D | gss_krb5_seal.c | 4 * Adapted from MIT Kerberos 5-1.2.1 lib/gssapi/krb5/k5seal.c
6 * Copyright (c) 2000-2008 The Regents of the University of Michigan.
40 * Export of this software from the United States of America may require
41 * a specific license from the United States Government. It is the
79 u8 *p, flags = 0x00; in setup_token_v2() local
81 if ((ctx->flags & KRB5_CTX_FLAG_INITIATOR) == 0) in setup_token_v2()
83 if (ctx->flags & KRB5_CTX_FLAG_ACCEPTOR_SUBKEY) in setup_token_v2()
89 krb5_hdr = (u16 *)token->data; in setup_token_v2()
93 p = (u8 *)ptr; in setup_token_v2()
94 *p++ = flags; in setup_token_v2()
[all …]
|
| /linux/drivers/cpufreq/ |
| H A D | powernow-k8.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * (c) 2003-2006 Advanced Micro Devices, Inc.
9 u32 numps; /* number of p-states */
10 u32 batps; /* number of p-states supported on battery */
13 * vid/fid pairings, but are modified during the ->target() call
32 * used to determine valid frequency/vid/fid states */
36 * handle hotplug events - so just point at cpufreq pol->cpus
53 /* Model Specific Registers for p-state transitions. MSRs are 64-bit. For */
54 /* writes (wrmsr - opcode 0f 30), the register number is placed in ecx, and */
55 /* the value to write is placed in edx:eax. For reads (rdmsr - opcode 0f 32), */
[all …]
|
| /linux/drivers/i2c/muxes/ |
| H A D | i2c-demux-pinctrl.c | 1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2015-16 by Wolfram Sang, Sang Engineering <wsa@sang-engineering.com>
6 * Copyright (C) 2015-16 by Renesas Electronics Corporation
9 * (look for filenames containing 'i2c-demux-pinctrl' in Documentation/)
40 struct i2c_demux_pinctrl_priv *priv = adap->algo_data; in i2c_demux_master_xfer()
41 struct i2c_adapter *parent = priv->chan[priv->cur_chan].parent_adap; in i2c_demux_master_xfer()
48 struct i2c_demux_pinctrl_priv *priv = adap->algo_data; in i2c_demux_functionality()
49 struct i2c_adapter *parent = priv->chan[priv->cur_chan].parent_adap; in i2c_demux_functionality()
51 return parent->algo->functionality(parent); in i2c_demux_functionality()
57 struct pinctrl *p; in i2c_demux_activate_master() local
[all …]
|
| /linux/Documentation/tools/rtla/ |
| H A D | common_timerlat_options.rst | 1 .. |threshold| replace:: **-a/--auto**, **-i/--irq**, or **-T/--thread**
2 .. |thresharg| replace:: -T
6 For time-sensitive actions, it is recommended to run **rtla timerlat** with BPF
11 **-a**, **--auto** *us*
14 while debugging the system. It is equivalent to use **-T** *us* **-s** *us*
15 **-t**. By default, *timerlat* tracer uses FIFO:95 for *timerlat* threads,
16 thus equilavent to **-P** *f:95*.
18 **-p**, **--period** *us*
22 **-i**, **--irq** *us*
26 **-T**, **--thread** *us*
[all …]
|
| /linux/drivers/pinctrl/ |
| H A D | core.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2011 ST-Ericsson SA
6 * Written on behalf of Linaro for ST-Ericsson
14 #include <linux/radix-tree.h>
30 * struct pinctrl_dev - pin control class device
46 * @p: result of pinctrl_get() for this device
68 struct pinctrl *p; member
78 * struct pinctrl - per-device pin control state holder
81 * @states: a list of states for this device
90 struct list_head states; member
[all …]
|
| /linux/Documentation/trace/ |
| H A D | events-power.rst | 8 - Power state switch which reports events related to suspend (S-states),
9 cpuidle (C-states) and cpufreq (P-states)
10 - System clock related changes
11 - Power domains related changes and transitions
22 -----------------
24 A 'cpu' event class gathers the CPU-related events: cpuidle and
39 Note: the value of '-1' or '4294967295' for state means an exit from the current state,
46 correctly draw the states diagrams and to calculate accurate statistics etc.
|
| /linux/Documentation/trace/rv/ |
| H A D | deterministic_automata.rst | 10 - *X* is the set of states;
11 - *E* is the finite set of events;
12 - x\ :subscript:`0` is the initial state;
13 - X\ :subscript:`m` (subset of *X*) is the set of marked (or final) states.
14 - *f* : *X* x *E* -> *X* $ is the transition function. It defines the state
22 - *X* = { ``preemptive``, ``non_preemptive``}
23 - *E* = { ``preempt_enable``, ``preempt_disable``, ``sched_waking``}
24 - x\ :subscript:`0` = ``preemptive``
25 - X\ :subscript:`m` = {``preemptive``}
26 - *f* =
[all …]
|
| /linux/include/linux/ |
| H A D | rcupdate.h | 1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Read-Copy Update mechanism for mutual exclusion
15 * For detailed explanation of Read-Copy Update mechanism see -
34 #define ULONG_CMP_GE(a, b) (ULONG_MAX / 2 >= (a) - (b))
35 #define ULONG_CMP_LT(a, b) (ULONG_MAX / 2 < (a) - (b))
38 #define RCU_SEQ_STATE_MASK ((1 << RCU_SEQ_CTR_SHIFT) - 1)
50 // not-yet-completed RCU grace periods.
54 * same_state_synchronize_rcu - Are two old-state values identical?
55 * @oldstate1: First old-state value.
56 * @oldstate2: Second old-state value.
[all …]
|
| /linux/drivers/hv/ |
| H A D | mshv_root_main.c | 1 // SPDX-License-Identifier: GPL-2.0-only
11 #include <linux/entry-virt.h>
28 #include <linux/page-flags.h>
39 MODULE_DESCRIPTION("Microsoft Hyper-V root partition VMM interface /dev/mshv");
164 return -EFAULT; in mshv_ioctl_passthru_hvcall()
168 return -EINVAL; in mshv_ioctl_passthru_hvcall()
171 return -EINVAL; in mshv_ioctl_passthru_hvcall()
178 return -EINVAL; in mshv_ioctl_passthru_hvcall()
184 return -EINVAL; in mshv_ioctl_passthru_hvcall()
193 return -ENOMEM; in mshv_ioctl_passthru_hvcall()
[all …]
|