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/Documentation/devicetree/bindings/timer/
Darm,arch_timer_mmio.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Marc Zyngier <marc.zyngier@arm.com>
11 - Mark Rutland <mark.rutland@arm.com>
22 - enum:
23 - arm,armv7-timer-mem
29 '#address-cells':
32 '#size-cells':
37 clock-frequency:
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Darm,arch_timer.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Marc Zyngier <marc.zyngier@arm.com>
11 - Mark Rutland <mark.rutland@arm.com>
13 ARM cores may have a per-core architected timer, which provides per-cpu timers,
17 The per-core architected timer is attached to a GIC to deliver its
18 per-processor interrupts via PPIs. The memory mapped timer is attached to a GIC
24 - items:
25 - const: arm,cortex-a15-timer
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/Documentation/timers/
Dhighres.rst5 Further information can be found in the paper of the OLS 2006 talk "hrtimers
8 https://www.kernel.org/doc/ols/2006/ols2006v1-pages-333-346.pdf
11 http://www.cs.columbia.edu/~nahum/w6998/papers/ols2006-hrtimers-slides.pdf
14 changes in the time(r) related Linux subsystems. Figure #1 (p. 2) shows the
19 switched to the name "clock event devices" in meantime.
23 - hrtimer base infrastructure
24 - timeofday and clock source management
25 - clock event management
26 - high resolution timer functionality
27 - dynamic ticks
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/Documentation/driver-api/pm/
Dcpuidle.rst1 .. SPDX-License-Identifier: GPL-2.0
16 Every time one of the logical CPUs in the system (the entities that appear to
19 there are no tasks to run on it except for the special "idle" task associated
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
26 situation in principle, so it may be necessary to find the most suitable one
29 subsystem in the kernel, called ``CPUIdle``.
32 principle, so the generic code that in principle need not depend on the hardware
33 or platform design details in it is separate from the code that interacts with
44 one of the logical CPUs in the system turns out to be idle. Its role is to
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/Documentation/admin-guide/
Dkernel-parameters.txt7 accepted. In most cases the overhead is negligible.
16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nospcr -- disable console in ACPI SPCR table as
41 If set to vendor, prefer vendor-specific driver
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/Documentation/ABI/testing/
Dsysfs-devices-system-cpu2 Date: pre-git history
3 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
7 Individual CPU attributes are contained in subdirectories
18 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
34 present: cpus that have been identified as being present in
37 See Documentation/admin-guide/cputopology.rst for more information.
43 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
58 Contact: Linux memory management mailing list <linux-mm@kvack.org>
65 in NUMA node 2:
67 /sys/devices/system/cpu/cpu42/node2 -> ../../node/node2
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/Documentation/sound/kernel-api/
Dwriting-an-alsa-driver.rst11 Architecture) <http://www.alsa-project.org/>`__ driver. The document
12 focuses mainly on PCI soundcards. In the case of other device types, the
19 low-level driver implementation details. It only describes the standard
26 -------
56 --------------
59 drivers. In this directory, the native ALSA modules are stored. The
60 sub-directories contain different modules and are dependent upon the
66 The code for OSS PCM and mixer emulation modules is stored in this
67 directory. The OSS rawmidi emulation is included in the ALSA rawmidi
68 code since it's quite small. The sequencer code is stored in
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/Documentation/virt/kvm/
Dapi.rst1 .. SPDX-License-Identifier: GPL-2.0
4 The Definitive KVM (Kernel-based Virtual Machine) API Documentation
13 - System ioctls: These query and set global attributes which affect the
14 whole kvm subsystem. In addition a system ioctl is used to create
17 - VM ioctls: These query and set attributes that affect an entire virtual
18 machine, for example memory layout. In addition a VM ioctl is used to
24 - vcpu ioctls: These query and set attributes that control the operation
28 the vcpu, except for asynchronous vcpu ioctl that are marked as such in
32 - device ioctls: These query and set attributes that control the operation
51 In general file descriptors can be migrated among processes by means
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