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/Documentation/admin-guide/perf/
Darm-ccn.rst5 CCN-504 is a ring-bus interconnect consisting of 11 crosspoints
11 -----------------
29 Crosspoint watchpoint-based events (special "event" value 0xfe)
34 Masks are defined separately from the event description
45 request the events on this processor (if not, the perf_event->cpu value
57 / # perf stat -a -e ccn/cycles/,ccn/xp_valid_flit,xp=1,port=0,vc=1,dir=1/ \
61 not work. Per-task (without "-a") perf sessions are not supported.
Dalibaba_pmu.rst2 Alibaba's T-Head SoC Uncore Performance Monitoring Unit (PMU)
5 The Yitian 710, custom-built by Alibaba Group's chip development business,
6 T-Head, implements uncore PMU for performance and functional debugging to
9 DDR Sub-System Driveway (DRW) PMU Driver
14 channel is split into two independent sub-channels. The DDR Sub-System Driveway
15 implements separate PMUs for each sub-channel to monitor various performance
20 sub-channels of the same channel in die 0. And the PMU device of die 1 is
23 Each sub-channel has 36 PMU counters in total, which is classified into
26 - Group 0: PMU Cycle Counter. This group has one pair of counters
30 - Group 1: PMU Bandwidth Counters. This group has 8 counters that are used
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/Documentation/core-api/
Dnetlink.rst1 .. SPDX-License-Identifier: BSD-3-Clause
13 ---------------
21 -------------
31 ---------------
44 ----------
51 ------------------------
54 them - make sure to report dump inconsistency with ``NLM_F_DUMP_INTR``.
65 -------
67 kernel-policy
71 operations of the family, defined for each operation individually - ``per-op``,
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Ddma-attributes.rst6 defined in linux/dma-mapping.h.
9 ----------------------
19 ----------------------
29 --------------------------
33 such mapping is non-trivial task and consumes very limited resources
47 ----------------------
52 having a mapping created separately for each device and is usually
71 -------------------------
73 By default DMA-mapping subsystem is allowed to assemble the buffer
80 ---------------------------
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/Documentation/process/
Dcode-of-conduct.rst11 our community a harassment-free experience for everyone, regardless of age, body
13 expression, level of experience, education, socio-economic status, nationality,
59 representing a project or community include using an official project e-mail
62 further defined and clarified by project maintainers.
74 separately.
80 available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
/Documentation/driver-api/usb/
Dcallbacks.rst7 Usbcore will call into a driver through callbacks defined in the driver
11 completion callback can be found in :ref:`usb-urb`.
13 The callbacks defined in the driver structure are:
17 - @probe:
21 - @disconnect:
28 - @ioctl:
36 - @suspend:
39 - @resume:
42 - @reset_resume:
48 - @pre_reset:
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/Documentation/driver-api/surface_aggregator/clients/
Dcdev.rst1 .. SPDX-License-Identifier: GPL-2.0+
8 User-Space EC Interface (cdev)
11 The ``surface_aggregator_cdev`` module provides a misc-device for the SSAM
12 controller to allow for a (more or less) direct connection from user-space to
18 device-file. All functionality of this interface is provided via IOCTLs.
19 These IOCTLs and their respective input/output parameter structs are defined in
23 at https://github.com/linux-surface/surface-aggregator-module/tree/master/scripts/ssam.
31 Events can be received by reading from the device-file. The are represented by
37 interface, associated with a specific target category and device-file-instance.
43 notifiers work per-client (i.e. per-device-file-instance), events are enabled
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/Documentation/networking/device_drivers/ethernet/altera/
Daltera_tse.rst1 .. SPDX-License-Identifier: GPL-2.0
6 Altera Triple-Speed Ethernet MAC driver
9 Copyright |copy| 2008-2014 Altera Corporation
11 This is the driver for the Altera Triple-Speed Ethernet (TSE) controllers
15 and tested with ARM and NIOS processor hosts separately. The anticipated use
24 The Triple-Speed Ethernet, SGDMA, and MSGDMA components are all soft IP
31 Triple-Speed Ethernet instance is using an SGDMA or MSGDMA component. The
36 The SGDMA component is to be deprecated in the near future (over the next 1-2
46 Scatter-gather DMA is not supported by the SGDMA or MSGDMA at this time.
47 Scatter-gather DMA will be added to a future maintenance update to this
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/Documentation/networking/
Dstatistics.rst1 .. SPDX-License-Identifier: GPL-2.0
14 - standard interface statistics based on
16 - protocol-specific statistics; and
17 - driver-defined statistics available via ethtool.
20 -----------------------------
25 $ ip -s -s link show dev ens4u1u1
38 Note that `-s` has been specified twice to see all members of
40 If `-s` is specified once the detailed errors won't be shown.
42 `ip` supports JSON formatting via the `-j` option.
51 see `Documentation/userspace-api/netlink/intro-specs.rst`.
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Dlapb-module.rst1 .. SPDX-License-Identifier: GPL-2.0
11 Changed (Henner Eisen, 2000-10-29): int return value for data_indication()
13 The LAPB module will be a separately compiled module for use by any parts of
17 separately loadable module, although it may be. The term module is used in
25 ----------
32 the LAPB parameter structure. These will be defined in a standard header
37 -----------------------------
59 ------------------------
93 3-31 Reserved, must be 0.
103 names will be defined in the public LAPB header file.
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/Documentation/arch/x86/
Dentry_64.rst1 .. SPDX-License-Identifier: GPL-2.0
16 for 64-bit, arch/x86/entry/entry_32.S for 32-bit and finally
17 arch/x86/entry/entry_64_compat.S which implements the 32-bit compatibility
18 syscall entry points and thus provides for 32-bit processes the
19 ability to execute syscalls when running on 64-bit kernels.
25 - system_call: syscall instruction from 64-bit code.
27 - entry_INT80_compat: int 0x80 from 32-bit or 64-bit code; compat syscall
30 - entry_INT80_compat, ia32_sysenter: syscall and sysenter from 32-bit
33 - interrupt: An array of entries. Every IDT vector that doesn't
36 magically-generated functions that make their way to common_interrupt()
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Dxstate.rst4 The x86 architecture supports floating-point extensions which are
8 Up to AVX-512 and PKRU states, these features are automatically enabled by
15 --------------------------------
17 Legacy userspace libraries often have hard-coded, static sizes for
21 must include an XSAVE buffer defined by the CPU.
24 because different CPUs have differently-sized XSAVE buffers. A compiled-in
28 properly-sized altstacks.
31 --------------------------------------------------------------------
37 -ARCH_GET_XCOMP_SUPP
44 -ARCH_GET_XCOMP_PERM
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/Documentation/driver-api/gpio/
Dboard.rst10 describe its hardware layout. Currently, mappings can be defined through device
14 -----------
19 GPIOs mappings are defined in the consumer device's node, in a property named
20 <function>-gpios, where <function> is the function the driver will request
26 led-gpios = <&gpio 15 GPIO_ACTIVE_HIGH>, /* red */
30 power-gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
33 Properties named <function>-gpio are also considered valid and old bindings use
52 the <function>-prefix of the GPIO suffixes ("gpios" or "gpio", automatically
54 "led-gpios" example, use the prefix without the "-" as con_id parameter: "led".
58 (``snprintf(... "%s-%s", con_id, gpio_suffixes[]``).
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/Documentation/devicetree/bindings/mailbox/
Darm,mhuv3.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Sudeep Holla <sudeep.holla@arm.com>
11 - Cristian Marussi <cristian.marussi@arm.com>
27 - Configure the MHU
28 - Send Transfers to the Receiver
29 - Optionally receive acknowledgment of a Transfer from the Receiver
32 - Configure the MHU
33 - Receive Transfers from the Sender
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/Documentation/devicetree/bindings/media/
Damphion,vpu.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Ming Qian <ming.qian@nxp.com>
12 - Shijie Qin <shijie.qin@nxp.com>
14 description: |-
20 pattern: "^vpu@[0-9a-f]+$"
24 - enum:
25 - nxp,imx8qm-vpu
26 - nxp,imx8qxp-vpu
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/Documentation/driver-api/
Drfkill.rst2 rfkill - RF kill switch support
25 - hard block
26 read-only radio block that cannot be overridden by software
28 - soft block
34 admin-guide/kernel-parameters.rst.
43 * the deprecated rfkill-input module (an input layer handler, being
49 the system know about hardware-disabled states that may be implemented on
56 When the device is hard-blocked (either by a call to rfkill_set_hw_state()
62 keeps track of soft and hard block separately.
83 to ensure the driver cannot be built-in when rfkill is modular. The !RFKILL
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Ddpll.rst1 .. SPDX-License-Identifier: GPL-2.0
10 PLL - Phase Locked Loop is an electronic circuit which syntonizes clock
14 DPLL - Digital Phase Locked Loop is an integrated circuit which in
27 monitoring multicast group defined.
82 - ``DPLL_PIN_STATE_CONNECTED`` - the pin is used to drive dpll device
83 - ``DPLL_PIN_STATE_DISCONNECTED`` - the pin is not used to drive dpll
89 - ``DPLL_PIN_STATE_SELECTABLE`` - the pin shall be considered as valid
91 - ``DPLL_PIN_STATE_DISCONNECTED`` - the pin shall be not considered as
104 1) Set on a pin - the configuration affects all dpll devices pin is
106 2) Set on a pin-dpll tuple - the configuration affects only selected
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/Documentation/livepatch/
Dshadow-vars.rst7 allocated separately from parent data structures, which are left
11 The implementation introduces a global, in-kernel hashtable that
30 meta-data and shadow-data:
32 - meta-data
34 - obj - pointer to parent object
35 - id - data identifier
37 - data[] - storage for shadow data
41 They also allow to call a custom constructor function when a non-zero
48 * klp_shadow_get() - retrieve a shadow variable data pointer
49 - search hashtable for <obj, id> pair
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/Documentation/admin-guide/gpio/
Dgpio-virtuser.rst1 .. SPDX-License-Identifier: GPL-2.0-only
8 consumer devices can be instantiated from device-tree or over configfs.
10 A virtual consumer uses the driver-facing GPIO APIs and allows to cover it with
11 automated tests driven by user-space. The GPIOs are requested using
15 -----------------------
17 The gpio-consumer module registers a configfs subsystem called
18 ``'gpio-virtuser'``. For details of the configfs filesystem, please refer to
25 **Group:** ``/config/gpio-virtuser``
27 This is the top directory of the gpio-consumer configfs tree.
29 **Group:** ``/config/gpio-consumer/example-name``
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/Documentation/bpf/
Dbpf_prog_run.rst1 .. SPDX-License-Identifier: GPL-2.0
16 --------
20 can be used to unit test BPF programs against user-supplied context objects, and
23 to be defined in the UAPI header, aliased to the same value.
28 - ``BPF_PROG_TYPE_SOCKET_FILTER``
29 - ``BPF_PROG_TYPE_SCHED_CLS``
30 - ``BPF_PROG_TYPE_SCHED_ACT``
31 - ``BPF_PROG_TYPE_XDP``
32 - ``BPF_PROG_TYPE_SK_LOOKUP``
33 - ``BPF_PROG_TYPE_CGROUP_SKB``
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/Documentation/virt/kvm/devices/
Darm-vgic-v3.rst1 .. SPDX-License-Identifier: GPL-2.0
9 - KVM_DEV_TYPE_ARM_VGIC_V3 ARM Generic Interrupt Controller v3.0
12 will act as the VM interrupt controller, requiring emulated user-space devices
23 KVM_VGIC_V3_ADDR_TYPE_DIST (rw, 64-bit)
28 KVM_VGIC_V3_ADDR_TYPE_REDIST (rw, 64-bit)
35 KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION (rw, 64-bit)
38 bits: | 63 .... 52 | 51 .... 16 | 15 - 12 |11 - 0
41 - index encodes the unique redistributor region index
42 - flags: reserved for future use, currently 0
43 - base field encodes bits [51:16] of the guest physical base address
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/Documentation/scsi/
DChangeLog.sym53c8xx_22 * version sym-2.1.0-20001230
3 - Initial release of SYM-2.
6 * version sym-2.1.1-20010108
7 - Change a couple of defines containing ncr or NCR by their
11 * version sym-2.1.2-20010114
12 - Fix a couple of printfs:
17 * version sym-2.1.3-20010117
18 - Wrong residual values were returned in some situations.
19 This broke cdrecord with linux-2.4.0, for example.
22 * version sym-2.1.4-20010120
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/Documentation/arch/arm/
Dinterrupts.rst5 2.5.2-rmk5:
7 major architecture-specific subsystems.
10 MMU TLB. Each MMU TLB variant is now handled completely separately -
26 SA1100 ------------> Neponset -----------> SA1111
28 -----------> USAR
30 -----------> SMC9196
33 exclusive of each other - if you're processing one interrupt from the
36 IDE PIO-based interrupt on the SA1111 excludes all other SA1111 and
37 SMC9196 interrupts until it has finished transferring its multi-sector
51 GPIO0-10, and another for all the rest. It is just a container for
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/Documentation/devicetree/bindings/gpio/
Dgpio.txt5 -----------------
7 GPIO properties should be named "[<name>-]gpios", with <name> being the purpose
8 of this GPIO for the device. While a non-existent <name> is considered valid
10 for new bindings. Also, GPIO properties named "[<name>-]gpio" are valid and old
24 and bit-banged data signals:
27 gpio-controller;
28 #gpio-cells = <2>;
32 data-gpios = <&gpio1 12 0>,
44 recommended to use the two-cell approach.
47 for these, use the macros defined in
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/Documentation/input/joydev/
Djoystick-api.rst1 .. _joystick-api:
7 :Author: Ragnar Hojland Espinosa <ragnar@macula.net> - 7 Aug 1998
18 driver now reports only any changes of its state. See joystick-api.txt,
51 where js_event is defined as::
65 -------------
86 ---------------
108 --------------
110 For an axis, ``value`` is a signed integer between -32767 and +32767
124 may work well if you handle JS_EVENT_INIT events separately,
141 -------------
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