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/Documentation/devicetree/bindings/display/
Dsimple-framebuffer.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/display/simple-framebuffer.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Hans de Goede <hdegoede@redhat.com>
13 A simple frame-buffer describes a frame-buffer setup by firmware or
19 sub-nodes of the chosen node (*). Simplefb nodes must be named
41 interaction, then the chosen node stdout-path property should point
46 It is advised that devicetree files contain pre-filled, disabled
52 If pre-filled framebuffer nodes are used, the firmware may need
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/Documentation/networking/
Dtls-handshake.rst1 .. SPDX-License-Identifier: GPL-2.0
4 In-Kernel TLS Handshake
11 over TCP. TLS provides end-to-end data integrity and confidentiality in
21 implementations so that in-kernel TLS consumers do not need to be
46 A kernel TLS consumer initiates a client-side TLS handshake on an open
50 .. code-block:: c
68 instantiated a struct file in sock->file.
75 The consumer can provide a NUL-terminated hostname in the @ta_peername
85 keys, and pre-shared keys are provided to the handshake agent in keys
91 To request an x.509-authenticated TLS session, the consumer fills in
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/Documentation/input/
Dgameport-programming.rst34 Please also consider enabling the gameport on the card in the ->open()
35 callback if the io is mapped to ISA space - this way it'll occupy the io
37 ->close() callback. You also can select the io address in the ->open()
70 the driver doesn't have to measure them the old way - an ADC is built into
86 return -(mode != GAMEPORT_MODE_COOKED);
97 See analog.c and input.c for handling of fuzz - the fuzz value determines
105 examples 1+2 or 1+3. Gameports can support internal calibration - see below,
107 more than one gameport instance simultaneously, use the ->private member of
147 I/O address for use with raw mode. You have to either set this, or ->read()
191 pre-filled by cooked data by the caller, max[0..3] should be pre-filled with
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/Documentation/userspace-api/media/dvb/
Dfrontend-stat-properties.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _frontend-stat-properties:
27 The number of filled elements are stored at ``dtv_property.stat.len``.
32 - ``svalue`` or ``uvalue``, where ``svalue`` is for signed values of
36 - ``scale`` - Scale for the value. It can be:
38 - ``FE_SCALE_NOT_AVAILABLE`` - The parameter is supported by the
42 - ``FE_SCALE_DECIBEL`` - parameter is a signed value, measured in
45 - ``FE_SCALE_RELATIVE`` - parameter is a unsigned value, where 0
48 - ``FE_SCALE_COUNTER`` - parameter is a unsigned value that counts
53 .. _DTV-STAT-SIGNAL-STRENGTH:
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/Documentation/filesystems/
Dorangefs.rst1 .. SPDX-License-Identifier: GPL-2.0
7 OrangeFS is an LGPL userspace scale-out parallel storage system. It is ideal
51 On Fedora, install orangefs and orangefs-server::
53 dnf -y install orangefs orangefs-server
64 pvfs2-client-core.
68 pvfs2-server -f /etc/orangefs/orangefs.conf
72 systemctl start orangefs-server
76 pvfs2-ping -m /pvfsmnt
81 systemctl start orangefs-client
85 mount -t pvfs2 tcp://localhost:3334/orangefs /pvfsmnt
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Dcoda.rst1 .. SPDX-License-Identifier: GPL-2.0
4 Coda Kernel-Venus Interface
10 Coda -- this document describes the client kernel-Venus interface.
35 level filesystem code needed for the operation of the Coda file sys-
124 leads to an almost natural environment for implementing a kernel-level
153 pre-processing, the VFS starts invoking exported routines in the FS
208 up processes. The Coda FS driver processes VFS- and pioctl-requests
220 memory for the request. Since the data buffer is re-used to hold the
226 is filled in, flags are set to 0, and it is placed on the *pending*
283 processing. The VFS routine will now continue. (-- If a VFS request
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Dmount_api.rst1 .. SPDX-License-Identifier: GPL-2.0
37 (3) Validate and pre-process the context.
52 The first is invoked to set up the filesystem-specific parts of a filesystem
93 below). This must be set by the ->init_fs_context() file_system_type
115 superblock thereof). This is filled in by the ->get_tree() op. If this
116 is set, an active reference on root->d_sb must also be held.
174 These will be bitwise-OR'd with s->s_iflags when a superblock is created.
228 Called to clean up the filesystem-specific part of the filesystem context
230 context may have been removed and NULL'd out by ->get_tree().
237 filesystem-private data. An error may be returned to indicate failure to
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/Documentation/security/
Dsiphash.rst2 SipHash - a short input PRF
7 SipHash is a cryptographically secure PRF -- a keyed hash function -- that
9 cryptographers Daniel J. Bernstein and Jean-Philippe Aumasson. It is intended
13 SipHash takes a secret key filled with randomly generated numbers and either
49 will constant fold at compile-time and automatically choose one of the
61 get_random_bytes(&table->key, sizeof(table->key));
66 …return &table->hashtable[siphash(input, sizeof(*input), &table->key) & (HASH_SIZE(table->hashtable…
74 SipHash has a very high security margin, with its 128-bit key. So long as the
79 Linux implements the "2-4" variant of SipHash.
81 Struct-passing Pitfalls
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/Documentation/driver-api/
Dxillybus.rst10 - Introduction
11 -- Background
12 -- Xillybus Overview
14 - Usage
15 -- User interface
16 -- Synchronization
17 -- Seekable pipes
19 - Internals
20 -- Source code organization
21 -- Pipe attributes
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/Documentation/admin-guide/blockdev/
Dzram.rst2 zram: Compressed RAM-based block devices
8 The zram module creates RAM-based block devices named /dev/zram<id>
20 There are several ways to configure and manage zram device(-s):
23 b) using zramctl utility, provided by util-linux (util-linux@vger.kernel.org).
28 In order to get a better idea about zramctl please consult util-linux
29 documentation, zramctl man-page or `zramctl --help`. Please be informed
30 that zram maintainers do not develop/maintain util-linux or zramctl, should
31 you have any questions please contact util-linux@vger.kernel.org
45 -EBUSY an attempt to modify an attribute that cannot be changed once
47 -ENOMEM zram was not able to allocate enough memory to fulfil your
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/Documentation/driver-api/nfc/
Dnfc-hci.rst5 - Author: Eric Lapuyade, Samuel Ortiz
6 - Contact: eric.lapuyade@intel.com, samuel.ortiz@intel.com
9 -------
12 enables easy writing of HCI-based NFC drivers. The HCI layer runs as an NFC Core
17 ---
30 - one for executing commands : nfc_hci_msg_tx_work(). Only one command
32 - one for dispatching received events and commands : nfc_hci_msg_rx_work().
35 --------------------------
41 In case the chip supports pre-opened gates and pseudo-static pipes, the driver
45 -------------------
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/Documentation/sound/kernel-api/
Dwriting-an-alsa-driver.rst11 Architecture) <http://www.alsa-project.org/>`__ driver. The document
19 low-level driver implementation details. It only describes the standard
26 -------
56 --------------
60 sub-directories contain different modules and are dependent upon the
74 This directory and its sub-directories are for the ALSA sequencer. This
76 as snd-seq-midi, snd-seq-virmidi, etc. They are compiled only when
85 -----------------
88 to be exported to user-space, or included by several files in different
94 -----------------
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/Documentation/filesystems/iomap/
Ddesign.rst1 .. SPDX-License-Identifier: GPL-2.0
78 1. Obtain a space mapping via ``->iomap_begin``
80 2. For each sub-unit of work...
89 4. Release the mapping via ``->iomap_end``, if necessary
105 -----------
127 device pre-shutdown hook from returning before other threads have
152 ----------------
158 .. code-block:: c
193 ``->iomap_end`` function must delete the reservation.
212 For write operation, the ``->iomap_end`` function presumably
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/Documentation/admin-guide/media/
Dipu3.rst1 .. SPDX-License-Identifier: GPL-2.0
24 ImgU). The CIO2 driver is available as drivers/media/pci/intel/ipu3/ipu3-cio2*
36 Both of the drivers implement V4L2, Media Controller and V4L2 sub-device
38 MIPI CSI-2 interfaces through V4L2 sub-device sensor drivers.
44 interface to the user space. There is a video node for each CSI-2 receiver,
47 The CIO2 contains four independent capture channel, each with its own MIPI CSI-2
48 receiver and DMA engine. Each channel is modelled as a V4L2 sub-device exposed
49 to userspace as a V4L2 sub-device node and has two pads:
53 .. flat-table::
54 :header-rows: 1
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/Documentation/devicetree/bindings/net/
Dsnps,dwmac.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Alexandre Torgue <alexandre.torgue@foss.st.com>
11 - Giuseppe Cavallaro <peppe.cavallaro@st.com>
12 - Jose Abreu <joabreu@synopsys.com>
23 - snps,dwmac
24 - snps,dwmac-3.40a
25 - snps,dwmac-3.50a
26 - snps,dwmac-3.610
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/Documentation/arch/sparc/oradax/
Ddax-hv-api.txt3 Publication date 2017-09-25 08:21
5 Extracted via "pdftotext -f 547 -l 572 -layout sun4v_20170925.pdf"
16 live-migration and other system management activities.
20 …high speed processoring of database-centric operations. The coprocessors may support one or more of
28 …e Completion Area and, unless execution order is specifically restricted through the use of serial-
45 …device node in the guest MD (Section 8.24.17, “Database Analytics Accelerators (DAX) virtual-device
51 36.1.1.1. "ORCL,sun4v-dax" Device Compatibility
54 • No-op/Sync
81 36.1.1.2. "ORCL,sun4v-dax-fc" Device Compatibility
82 … "ORCL,sun4v-dax-fc" is compatible with the "ORCL,sun4v-dax" interface, and includes additional CCB
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/Documentation/gpu/
Dtodo.rst11 ----------
29 Subsystem-wide refactorings
33 ---------------------------------------------
45 --------------------------------------------------
53 non-converted driver. The "Atomic mode setting design overview" series [2]_
60 .. [1] https://blog.ffwll.ch/2014/11/atomic-modeset-support-for-kms-drivers.html
69 ---------------------------------------------------------
75 avoid confusion - the other helpers in that file are all deprecated legacy
83 ----------------------------------
88 - drm_plane_helper_funcs->atomic_check gets called for enabled or disabled
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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
17 - VM ioctls: These query and set attributes that affect an entire virtual
24 - vcpu ioctls: These query and set attributes that control the operation
32 - device ioctls: These query and set attributes that control the operation
80 facility that allows backward-compatible extensions to the API to be
104 the ioctl returns -ENOTTY.
122 -----------------------
139 -----------------
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/Documentation/admin-guide/
Dcgroup-v2.rst1 .. _cgroup-v2:
11 conventions of cgroup v2. It describes all userland-visible aspects
14 v1 is available under :ref:`Documentation/admin-guide/cgroup-v1/index.rst <cgroup-v1>`.
19 1-1. Terminology
20 1-2. What is cgroup?
22 2-1. Mounting
23 2-2. Organizing Processes and Threads
24 2-2-1. Processes
25 2-2-2. Threads
26 2-3. [Un]populated Notification
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Dkernel-parameters.txt16 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
73 Documentation/firmware-guide/acpi/debug.rst for more information about
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/Documentation/sound/
Dalsa-configuration.rst2 Advanced Linux Sound Architecture - Driver Configuration guide
38 ----------
47 limiting card index for auto-loading (1-8);
49 For auto-loading more than one card, specify this option
50 together with snd-card-X aliases.
63 Module snd-pcm-oss
64 ------------------
86 regarding opening the device. When this option is non-zero,
90 Module snd-rawmidi
91 ------------------
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/Documentation/arch/x86/
Dboot.rst1 .. SPDX-License-Identifier: GPL-2.0
12 real-mode DOS as a mainstream operating system.
28 Protocol 2.02 (Kernel 2.4.0-test3-pre3) New command line protocol.
31 safe for systems which use the EBDA from SMM or 32-bit
35 Protocol 2.03 (Kernel 2.4.18-pre1) Explicitly makes the highest possible
54 Protocol 2.09 (Kernel 2.6.26) Added a field of 64-bit physical
68 Protocol 2.13 (Kernel 3.14) Support 32- and 64-bit flags being set in
69 xloadflags to support booting a 64-bit kernel from 32-bit
99 0A0000 +------------------------+
101 09A000 +------------------------+
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