| /linux/Documentation/bpf/ |
| H A D | map_devmap.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
9 - ``BPF_MAP_TYPE_DEVMAP`` was introduced in kernel version 4.14
10 - ``BPF_MAP_TYPE_DEVMAP_HASH`` was introduced in kernel version 5.4
14 ``BPF_MAP_TYPE_DEVMAP`` is backed by an array that uses the key as
16 is backed by a hash table that uses a key to lookup a reference to a net device.
17 The user provides either <``key``/ ``ifindex``> or <``key``/ ``struct bpf_devmap_val``>
21 - The key to a hash map doesn't have to be an ``ifindex``.
22 - While ``BPF_MAP_TYPE_DEVMAP_HASH`` allows for densely packing the net devices
23 it comes at the cost of a hash of the key when performing a look up.
25 The setup and packet enqueue/send code is shared between the two types of
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| H A D | map_sockmap.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
9 - ``BPF_MAP_TYPE_SOCKMAP`` was introduced in kernel version 4.14
10 - ``BPF_MAP_TYPE_SOCKHASH`` was introduced in kernel version 4.18
18 ``BPF_MAP_TYPE_SOCKMAP`` is backed by an array that uses an integer key as the
26 the map holds to user-space is neither safe nor useful.
44 .. code-block:: c
59 - ``msg_parser`` program - ``BPF_SK_MSG_VERDICT``.
60 - ``stream_parser`` program - ``BPF_SK_SKB_STREAM_PARSER``.
61 - ``stream_verdict`` program - ``BPF_SK_SKB_STREAM_VERDICT``.
62 - ``skb_verdict`` program - ``BPF_SK_SKB_VERDICT``.
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| H A D | map_lpm_trie.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
9 - ``BPF_MAP_TYPE_LPM_TRIE`` was introduced in kernel version 4.11
19 of 8, in the range from 8 to 2048. The key used for lookup and update
23 - For IPv4 addresses the data length is 4 bytes
24 - For IPv6 addresses the data length is 16 bytes
36 ----------
41 .. code-block:: c
43 void *bpf_map_lookup_elem(struct bpf_map *map, const void *key)
47 value associated with the longest matching ``key``, or ``NULL`` if no
50 The ``key`` should have ``prefixlen`` set to ``max_prefixlen`` when
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| H A D | map_hash.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
3 .. Copyright (C) 2022-2023 Isovalent, Inc.
10 - ``BPF_MAP_TYPE_HASH`` was introduced in kernel version 3.19
11 - ``BPF_MAP_TYPE_PERCPU_HASH`` was introduced in version 4.6
12 - Both ``BPF_MAP_TYPE_LRU_HASH`` and ``BPF_MAP_TYPE_LRU_PERCPU_HASH``
16 purpose hash map storage. Both the key and the value can be structs,
19 The kernel is responsible for allocating and freeing key/value pairs, up
20 to the max_entries limit that you specify. Hash maps use pre-allocation
22 used to disable pre-allocation when it is too memory expensive.
25 CPU. The per-cpu values are stored internally in an array.
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| H A D | map_cpumap.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
9 - ``BPF_MAP_TYPE_CPUMAP`` was introduced in kernel version 4.15
11 .. kernel-doc:: kernel/bpf/cpumap.c
14 An example use-case for this map type is software based Receive Side Scaling (RSS).
16 The CPUMAP represents the CPUs in the system indexed as the map-key, and the
17 map-value is the config setting (per CPUMAP entry). Each CPUMAP entry has a dedicated
32 ----------
35 .. code-block:: c
37 long bpf_redirect_map(struct bpf_map *map, u32 key, u64 flags)
39 Redirect the packet to the endpoint referenced by ``map`` at index ``key``.
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| H A D | map_queue_stack.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
9 - ``BPF_MAP_TYPE_QUEUE`` and ``BPF_MAP_TYPE_STACK`` were introduced
18 - ``BPF_MAP_LOOKUP_ELEM`` -> peek
19 - ``BPF_MAP_LOOKUP_AND_DELETE_ELEM`` -> pop
20 - ``BPF_MAP_UPDATE_ELEM`` -> push
29 ----------
34 .. code-block:: c
48 .. code-block:: c
59 .. code-block:: c
68 ---------
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| H A D | map_xskmap.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
9 - ``BPF_MAP_TYPE_XSKMAP`` was introduced in kernel version 4.18
18 .. code-block:: none
20 +---------------------------------------------------+
21 | xsk A | xsk B | xsk C |<---+ User space
24 +---------------------------------------------------+ |
26 +---------------------------------------------------+ |
28 | | key | xsk | | |
29 | +---------+ +=============+ | |
31 | | | +-------------+ | |
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| H A D | map_sk_storage.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
9 - ``BPF_MAP_TYPE_SK_STORAGE`` was introduced in kernel version 5.2
11 ``BPF_MAP_TYPE_SK_STORAGE`` is used to provide socket-local storage for BPF
13 to be provided and acts as the handle for accessing the socket-local
20 - The key type must be ``int`` and ``max_entries`` must be set to ``0``.
21 - The ``BPF_F_NO_PREALLOC`` flag must be used when creating a map for
22 socket-local storage.
28 ----------
33 .. code-block:: c
37 Socket-local storage for ``map`` can be retrieved from socket ``sk`` using the
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| /linux/Documentation/staging/ |
| H A D | static-keys.rst | 19 DEFINE_STATIC_KEY_TRUE(key);
20 DEFINE_STATIC_KEY_FALSE(key);
30 performance-sensitive fast-path kernel code, via a GCC feature and a code
33 DEFINE_STATIC_KEY_FALSE(key);
37 if (static_branch_unlikely(&key))
38 do unlikely code
40 do likely code
43 static_branch_enable(&key);
45 static_branch_disable(&key);
48 The static_branch_unlikely() branch will be generated into the code with as little
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| /linux/Documentation/devicetree/bindings/input/ |
| H A D | gpio-keys.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/input/gpio-keys.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rob Herring <robh@kernel.org>
15 - gpio-keys
16 - gpio-keys-polled
23 poll-interval: true
26 …"^(button|event|key|switch|(button|event|key|switch)-[a-z0-9-]+|[a-z0-9-]+-(button|event|key|switc…
35 - items:
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| H A D | pxa27x-keypad.txt | 4 - compatible : should be "marvell,pxa27x-keypad"
5 - reg : Address and length of the register set for the device
6 - interrupts : The interrupt for the keypad controller
7 - marvell,debounce-interval : How long time the key will be
9 is debounce interval for direct key and bit[15:0] is debounce
10 interval for matrix key. The value is in binary number of 2ms
13 Please refer to matrix-keymap.txt
16 - marvell,direct-key-count : How many direct keyes are used.
17 - marvell,direct-key-mask : The mask indicates which keyes
18 are used. If bit[X] of the mask is set, the direct key X
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| H A D | samsung,s3c6410-keypad.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/input/samsung,s3c6410-keypad.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 Samsung SoC Keypad controller is used to interface a SoC with a matrix-type
12 A key can be placed at each intersection of a unique row and a unique column.
13 The keypad controller can sense a key-press and key-release and report the
17 - Krzysztof Kozlowski <krzk@kernel.org>
22 - samsung,s3c6410-keypad
23 - samsung,s5pv210-keypad
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| /linux/arch/arm/boot/dts/samsung/ |
| H A D | exynos4412-smdk4412.dts | 1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (c) 2012-2013 Samsung Electronics Co., Ltd.
12 /dts-v1/;
14 #include "exynos-mfc-reserved-memory.dtsi"
31 stdout-path = "serial1:115200n8";
34 fixed-rate-clocks {
36 compatible = "samsung,clock-xxti";
37 clock-frequency = <0>;
41 compatible = "samsung,clock-xusbxti";
42 clock-frequency = <24000000>;
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| H A D | exynos4210-smdkv310.dts | 1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
7 * Copyright (c) 2010-2011 Linaro Ltd.
14 /dts-v1/;
16 #include <dt-bindings/gpio/gpio.h>
17 #include "exynos-mfc-reserved-memory.dtsi"
34 stdout-path = "serial1:115200n8";
37 fixed-rate-clocks {
39 compatible = "samsung,clock-xxti";
40 clock-frequency = <12000000>;
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| H A D | s5pv210-smdkv210.dts | 1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (c) 2013-2014 Samsung Electronics, Co. Ltd.
12 * NOTE: This file is completely based on original board file for mach-smdkv210
17 /dts-v1/;
18 #include <dt-bindings/interrupt-controller/irq.h>
19 #include <dt-bindings/input/input.h>
35 pmic_ap_clk: clock-0 {
37 compatible = "fixed-clock";
38 #clock-cells = <0>;
39 clock-frequency = <32768>;
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| /linux/include/linux/ |
| H A D | jump_label.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
8 * Copyright (C) 2009-2012 Jason Baron <jbaron@redhat.com>
9 * Copyright (C) 2011-2012 Red Hat, Inc., Peter Zijlstra
23 * DEFINE_STATIC_KEY_TRUE(key);
24 * DEFINE_STATIC_KEY_FALSE(key);
31 * self-modifying code. Assuming toolchain and architecture support, if we
32 * define a "key" that is initially false via "DEFINE_STATIC_KEY_FALSE(key)",
33 * an "if (static_branch_unlikely(&key))" statement is an unconditional branch
34 * (which defaults to false - and the true block is placed out of line).
35 * Similarly, we can define an initially true key via
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| /linux/Documentation/crypto/ |
| H A D | descore-readme.rst | 1 .. SPDX-License-Identifier: GPL-2.0
13 ------------------------------------------------------------------------------
15 des - fast & portable DES encryption & decryption.
42 2. PORTABILITY to any byte-addressable host with a 32bit unsigned C type
43 3. Plug-compatible replacement for KERBEROS's low-level routines.
46 register-starved machines. My discussions with Richard Outerbridge,
49 To more rapidly understand the code in this package, inspect desSmallFips.i
51 up in a parameterized fashion so it can easily be modified by speed-daemon
57 performance comparison to other available des code which i could
58 compile on a SPARCStation 1 (cc -O4, gcc -O2):
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| H A D | api-samples.rst | 1 Code Examples
4 Code Example For Symmetric Key Cipher Operation
5 -----------------------------------------------
7 This code encrypts some data with AES-256-XTS. For sake of example,
8 all inputs are random bytes, the encryption is done in-place, and it's
9 assumed the code is running in a context where it can sleep.
21 u8 iv[16]; /* AES-256-XTS takes a 16-byte IV */
22 u8 key[64]; /* AES-256-XTS takes a 64-byte key */
26 * Allocate a tfm (a transformation object) and set the key.
28 * In real-world use, a tfm and key are typically used for many
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| /linux/arch/arm/boot/dts/ti/omap/ |
| H A D | am3517-evm-ui.dtsi | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2018 Logic PD, Inc - https://www.logicpd.com/
6 #include <dt-bindings/input/input.h>
10 compatible = "simple-audio-card";
11 simple-audio-card,name = "tlv320aic23-hifi";
13 simple-audio-card,widgets =
18 simple-audio-card,routing =
25 simple-audio-card,format = "i2s";
26 simple-audio-card,bitclock-master = <&sound_master>;
27 simple-audio-card,frame-master = <&sound_master>;
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| /linux/drivers/tty/vt/ |
| H A D | ucs.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * ucs.c - Universal Character Set processing
23 static int interval16_cmp(const void *key, const void *element) in interval16_cmp() argument
25 u16 cp = *(u16 *)key; in interval16_cmp()
28 if (cp < entry->first) in interval16_cmp()
29 return -1; in interval16_cmp()
30 if (cp > entry->last) in interval16_cmp()
35 static int interval32_cmp(const void *key, const void *element) in interval32_cmp() argument
37 u32 cp = *(u32 *)key; in interval32_cmp()
40 if (cp < entry->first) in interval32_cmp()
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| /linux/fs/ubifs/ |
| H A D | tnc.c | 1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2006-2008 Nokia Corporation.
13 * the UBIFS B-tree.
27 static int fallible_read_node(struct ubifs_info *c, const union ubifs_key *key,
53 p = &c->old_idx.rb_node; in do_insert_old_idx()
57 if (old_idx->lnum < o->lnum) in do_insert_old_idx()
58 p = &(*p)->rb_left; in do_insert_old_idx()
59 else if (old_idx->lnum > o->lnum) in do_insert_old_idx()
60 p = &(*p)->rb_right; in do_insert_old_idx()
61 else if (old_idx->offs < o->offs) in do_insert_old_idx()
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| /linux/drivers/input/keyboard/ |
| H A D | pinephone-keyboard.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 // Copyright (C) 2021-2022 Samuel Holland <samuel@sholland.org>
18 #define DRV_NAME "pinephone-keyboard"
46 KEY(0, 0, KEY_ESC),
47 KEY(0, 1, KEY_1),
48 KEY(0, 2, KEY_2),
49 KEY(0, 3, KEY_3),
50 KEY(0, 4, KEY_4),
51 KEY(0, 5, KEY_5),
52 KEY(0, 6, KEY_6),
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| /linux/include/dt-bindings/input/ |
| H A D | input.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Most input bindings include key code, matrix key code format.
6 * In most cases, key code and matrix key code format uses
13 #include "linux-event-codes.h"
15 #define MATRIX_KEY(row, col, code) \ argument
16 ((((row) & 0xFF) << 24) | (((col) & 0xFF) << 16) | ((code) & 0xFFFF))
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| /linux/Documentation/driver-api/media/ |
| H A D | rc-core.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 -------------------------
12 Every time a key is pressed on a remote controller, a scan code is produced.
13 Also, on most hardware, keeping a key pressed for more than a few dozens of
14 milliseconds produce a repeat key event. That's somewhat similar to what
22 produces one event for a key press and another one for key release. On
23 infrared-based remote controllers, there's no key release event. Instead,
24 an extra code is produced to indicate key repeats.
43 scan code, being 8 bits for address (usually it is a fixed number for a
44 given remote controller), followed by 8 bits of code. A bit "1" is modulated
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| /linux/drivers/platform/x86/dell/ |
| H A D | dell-wmi-base.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
6 * Copyright (C) 2014-2015 Pali Rohár <pali@kernel.org>
22 #include <linux/input/sparse-keymap.h>
28 #include "dell-smbios.h"
29 #include "dell-wmi-descriptor.h"
30 #include "dell-wmi-privacy.h"
37 #define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492"
83 /* Meta key lock */
86 /* Meta key unlock */
89 /* Key code is followed by brightness level */
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