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/openbmc/linux/Documentation/driver-api/nvdimm/
H A Dsecurity.rst6 ---------------
16 ------------------
28 update <old_keyid> <new_keyid> - enable or update passphrase.
29 disable <keyid> - disable enabled security and remove key.
30 freeze - freeze changing of security states.
31 erase <keyid> - delete existing user encryption key.
32 overwrite <keyid> - wipe the entire nvdimm.
33 master_update <keyid> <new_keyid> - enable or update master passphrase.
34 master_erase <keyid> - delete existing user encryption key.
37 -----------------
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/openbmc/linux/Documentation/networking/
H A Dvrf.rst1 .. SPDX-License-Identifier: GPL-2.0
11 routing and forwarding domains (aka VRFs, VRF-lite to be specific) in the
12 Linux network stack. One use case is the multi-tenancy problem where each
30 ------
34 +-----------------------------+
35 | vrf-blue | ===> route table 10
36 +-----------------------------+
38 +------+ +------+ +-------------+
40 +------+ +------+ +-------------+
42 +------+ +------+
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/openbmc/linux/Documentation/ABI/testing/
H A Dsysfs-bus-i3c1 What: /sys/bus/i3c/devices/i3c-<bus-id>
3 Contact: linux-i3c@vger.kernel.org
5 An I3C bus. This directory will contain one sub-directory per
8 What: /sys/bus/i3c/devices/i3c-<bus-id>/current_master
10 Contact: linux-i3c@vger.kernel.org
12 Expose the master that owns the bus (<bus-id>-<master-pid>) at
17 What: /sys/bus/i3c/devices/i3c-<bus-id>/mode
19 Contact: linux-i3c@vger.kernel.org
21 I3C bus mode. Can be "pure", "mixed-fast" or "mixed-slow". See
25 What: /sys/bus/i3c/devices/i3c-<bus-id>/i3c_scl_frequency
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H A Dsysfs-bus-soundwire-master1 What: /sys/bus/soundwire/devices/sdw-master-<N>/revision
2 /sys/bus/soundwire/devices/sdw-master-<N>/clk_stop_modes
3 /sys/bus/soundwire/devices/sdw-master-<N>/clk_freq
4 /sys/bus/soundwire/devices/sdw-master-<N>/clk_gears
5 /sys/bus/soundwire/devices/sdw-master-<N>/default_col
6 /sys/bus/soundwire/devices/sdw-master-<N>/default_frame_rate
7 /sys/bus/soundwire/devices/sdw-master-<N>/default_row
8 /sys/bus/soundwire/devices/sdw-master-<N>/dynamic_shape
9 /sys/bus/soundwire/devices/sdw-master-<N>/err_threshold
10 /sys/bus/soundwire/devices/sdw-master-<N>/max_clk_freq
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/openbmc/linux/Documentation/scsi/
H A Dadvansys.rst1 .. SPDX-License-Identifier: GPL-2.0
8 RISC-based, Bus-Mastering, Fast (10 Mhz) and Ultra (20 Mhz) Narrow
9 (8-bit transfer) SCSI Host Adapters for the ISA, EISA, VL, and PCI
10 buses and RISC-based, Bus-Mastering, Ultra (20 Mhz) Wide (16-bit
21 - ABP-480 - Bus-Master CardBus (16 CDB)
24 - ABP510/5150 - Bus-Master ISA (240 CDB)
25 - ABP5140 - Bus-Master ISA PnP (16 CDB)
26 - ABP5142 - Bus-Master ISA PnP with floppy (16 CDB)
27 - ABP902/3902 - Bus-Master PCI (16 CDB)
28 - ABP3905 - Bus-Master PCI (16 CDB)
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/openbmc/linux/drivers/gpu/drm/
H A Ddrm_lock.c63 volatile unsigned int *lock = &lock_data->hw_lock->lock; in drm_lock_take()
65 spin_lock_bh(&lock_data->spinlock); in drm_lock_take()
72 ((lock_data->user_waiters + lock_data->kernel_waiters > 1) ? in drm_lock_take()
77 spin_unlock_bh(&lock_data->spinlock); in drm_lock_take()
98 * inside *_unlock to give lock to kernel before calling *_dma_schedule.
112 volatile unsigned int *lock = &lock_data->hw_lock->lock; in drm_lock_transfer()
114 lock_data->file_priv = NULL; in drm_lock_transfer()
127 volatile unsigned int *lock = &lock_data->hw_lock->lock; in drm_legacy_lock_free()
129 spin_lock_bh(&lock_data->spinlock); in drm_legacy_lock_free()
130 if (lock_data->kernel_waiters != 0) { in drm_legacy_lock_free()
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/openbmc/linux/Documentation/networking/dsa/
H A Dconfiguration.rst1 .. SPDX-License-Identifier: GPL-2.0
10 .. _dsa-config-showcases:
13 -----------------------
30 at https://www.kernel.org/pub/linux/utils/net/iproute2/
34 The corresponding linux Ethernet interface is called the master interface.
37 The slave interfaces depend on the master interface being up in order for them
38 to send or receive traffic. Prior to kernel v5.12, the state of the master
39 interface had to be managed explicitly by the user. Starting with kernel v5.12,
42 - when a DSA slave interface is brought up, the master interface is
44 - when the master interface is brought down, all DSA slave interfaces are
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/openbmc/linux/Documentation/w1/
H A Dw1-netlink.rst10 1. Events. They are generated each time a new master or slave device
21 [struct cn_msg] - connector header.
23 [struct w1_netlink_msg] - w1 netlink header.
24 __u8 type - message type.
30 master add/remove events
32 userspace command for bus master
37 __u8 status - error indication from kernel
38 __u16 len - size of data attached to this header data
40 __u8 id[8]; - slave unique device id
42 __u32 id; - master's id
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/openbmc/linux/Documentation/i2c/
H A Dgpio-fault-injection.rst5 The GPIO based I2C bus master driver can be configured to provide fault
7 which is driven by the I2C bus master driver under test. The GPIO fault
9 master driver should handle gracefully.
12 'i2c-fault-injector' subdirectory in the Kernel debugfs filesystem, usually
13 mounted at /sys/kernel/debug. There will be a separate subdirectory per GPIO
15 injection. They will be described now along with their intended use-cases.
21 -----
26 because the bus master under test will not be able to clock. It should detect
31 -----
36 master under test should detect this condition and trigger a bus recovery (see
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H A Dsummary.rst5 I²C (pronounce: I squared C and written I2C in the kernel documentation) is
6 a protocol developed by Philips. It is a slow two-wire protocol (variable
14 The latest official I2C specification is the `"I2C-bus specification and user
16 published by NXP Semiconductors. However, you need to log-in to the site to
18 `here <https://web.archive.org/web/20210813122132/https://www.nxp.com/docs/en/user-guide/UM10204.pd…
37 one or more *master* chips and one or more *slave* chips.
39 .. kernel-figure:: i2c_bus.svg
40 :alt: Simple I2C bus with one master and 3 slaves
44 A **master** chip is a node that starts communications with slaves. In the
45 Linux kernel implementation it is called an **adapter** or bus. Adapter
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/openbmc/linux/Documentation/filesystems/
H A Dfscrypt.rst2 Filesystem-level encryption (fscrypt)
11 Note: "fscrypt" in this document refers to the kernel-level portion,
14 covers the kernel-level portion. For command-line examples of how to
20 <https://source.android.com/security/encryption/file-based>`_, over
21 using the kernel's API directly. Using existing tools reduces the
23 completeness this documentation covers the kernel's API anyway.)
25 Unlike dm-crypt, fscrypt operates at the filesystem level rather than
28 filesystem. This is useful for multi-user systems where each user's
29 data-at-rest needs to be cryptographically isolated from the others.
34 directly into supported filesystems --- currently ext4, F2FS, and
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/openbmc/linux/drivers/w1/
H A Dw1_int.c1 // SPDX-License-Identifier: GPL-2.0-or-later
6 #include <linux/kernel.h>
18 static int w1_search_count = -1; /* Default is continual scan */
32 * We are in process context(kernel thread), so can sleep. in w1_alloc_dev()
42 dev->bus_master = (struct w1_bus_master *)(dev + 1); in w1_alloc_dev()
44 dev->owner = THIS_MODULE; in w1_alloc_dev()
45 dev->max_slave_count = slave_count; in w1_alloc_dev()
46 dev->slave_count = 0; in w1_alloc_dev()
47 dev->attempts = 0; in w1_alloc_dev()
48 dev->initialized = 0; in w1_alloc_dev()
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/openbmc/linux/Documentation/trace/
H A Dstm.rst1 .. SPDX-License-Identifier: GPL-2.0
10 which is assigned a unique pair of master and channel. While some of
14 master/channel combination from this pool.
17 sources can only be identified by master/channel combination, so in
20 master/channel pairs to the trace sources that it understands.
23 master 7 channel 15, while arbitrary user applications can use masters
34 associated with it, located in "stp-policy" subsystem directory in
40 $ ls /config/stp-policy/dummy_stm.my-policy/user
42 $ cat /config/stp-policy/dummy_stm.my-policy/user/masters
44 $ cat /config/stp-policy/dummy_stm.my-policy/user/channels
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/openbmc/linux/Documentation/driver-api/rapidio/
H A Drapidio.rst5 The RapidIO standard is a packet-based fabric interconnect standard designed for
8 is publicly available for download from the RTA web-site [1].
17 into the kernel similarly to other buses by defining RapidIO-specific device and
21 architecture-specific interfaces that provide support for common RapidIO
32 2.1 Master Port
33 ---------------
35 A master port (or mport) is a RapidIO interface controller that is local to the
36 processor executing the Linux code. A master port generates and receives RapidIO
37 packets (transactions). In the RapidIO subsystem each master port is represented
38 by a rio_mport data structure. This structure contains master port specific
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/openbmc/linux/Documentation/mm/damon/
H A Dmaintainer-profile.rst1 .. SPDX-License-Identifier: GPL-2.0
10 linux-mm@kvack.org. Patches should be made against the mm-unstable tree [1]_
14 ---------
18 Sufficiently reviewed patches will be queued in mm-unstable [1]_ by the memory
20 be queued in mm-stable [3]_ , and finally pull-requested to the mainline by the
23 Note again the patches for review should be made against the mm-unstable
28 -------------------------
32 - Build changes related outputs including kernel and documents.
33 - Ensure the builds introduce no new errors or warnings.
34 - Run and ensure no new failures for DAMON selftests [4]_ and kunittests [5]_ .
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/openbmc/linux/Documentation/w1/slaves/
H A Dw1_ds28e17.rst2 Kernel driver w1_ds28e17
7 * Maxim DS28E17 1-Wire-to-I2C Master Bridge
19 -----------
20 The DS28E17 is a Onewire slave device which acts as an I2C bus master.
24 a DS28E17 can be accessed by the kernel or userspace tools as if they were
25 connected to a "native" I2C bus master.
30 SUBSYSTEM=="i2c-dev", KERNEL=="i2c-[0-9]*", ATTRS{name}=="w1-19-*", \
31 SYMLINK+="i2c-$attr{name}"
33 may be used to create stable /dev/i2c- entries based on the unique id of the
41 it is connected. The power-on default of the DS28E17 is 400kBaud, but
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/openbmc/linux/Documentation/driver-api/i3c/
H A Dmaster-driver-api.rst1 .. SPDX-License-Identifier: GPL-2.0
4 I3C master controller driver API
7 .. kernel-doc:: drivers/i3c/master.c
9 .. kernel-doc:: include/linux/i3c/master.h
/openbmc/linux/drivers/mtd/parsers/
H A Dparser_imagetag.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org>
7 * Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
8 * Copyright © 2011-2013 Jonas Gorski <jonas.gorski@gmail.com>
16 #include <linux/kernel.h>
26 do { char *_str = (x); _str[sizeof(x) - 1] = 0; } while (0)
28 static int bcm963xx_read_imagetag(struct mtd_info *master, const char *name, in bcm963xx_read_imagetag() argument
35 ret = mtd_read(master, tag_offset, sizeof(*buf), &retlen, (void *)buf); in bcm963xx_read_imagetag()
40 return -EIO; in bcm963xx_read_imagetag()
44 if (computed_crc == buf->header_crc) { in bcm963xx_read_imagetag()
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/openbmc/linux/include/sound/
H A Dcontrol.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
14 #define snd_kcontrol_chip(kcontrol) ((kcontrol)->private_data)
29 ((info)->access & SNDRV_CTL_ELEM_ACCESS_SKIP_CHECK)
35 /* kernel only - LED bits */
37 #define SNDRV_CTL_ELEM_ACCESS_LED_MASK (7<<25) /* kernel three bits - LED group */
38 #define SNDRV_CTL_ELEM_ACCESS_SPK_LED (1<<25) /* kernel speaker (output) LED flag */
39 #define SNDRV_CTL_ELEM_ACCESS_MIC_LED (2<<25) /* kernel microphone (input) LED flag */
44 SNDRV_CTL_TLV_OP_CMD = -1,
149 * snd_ctl_find_id_mixer - find the control instance with the given name string
190 unsigned int ioff = id->numid - kctl->id.numid; in snd_ctl_get_ioffnum()
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/openbmc/linux/Documentation/driver-api/
H A Dspi.rst7 often in the range of 1-20 MHz), a "Master Out, Slave In" (MOSI) data
8 line, and a "Master In, Slave Out" (MISO) data line. SPI is a full
12 additional chipselect line is usually active-low (nCS); four signals are
18 only "master" side interfaces are supported, where Linux talks to SPI
29 <spi_controller>`. SPI devices are children of that master,
33 board-specific initialization code. A :c:type:`struct spi_driver
46 .. kernel-doc:: include/linux/spi/spi.h
49 .. kernel-doc:: drivers/spi/spi.c
52 .. kernel-doc:: drivers/spi/spi.c
/openbmc/docs/development/
H A Dadd-new-system.md19 - Review background about Yocto and BitBake
20 - Creating a new system layer
21 - Populating this new layer
22 - Building the new system and testing in QEMU
23 - Adding configs for sensors, LEDs, inventories, etc.
32 Yocto has a concept of hierarchical layers. When you build a Yocto-based
35 defined within OpenBMC can be found with the meta-\* directories in OpenBMC
40 [BitBake](https://github.com/openembedded/bitbake/blob/master/README) recipes.
57 [page](https://github.com/openbmc/openbmc/blob/master/README.md#2-download-the-source)
58 for the Romulus system (steps 2-4).
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/openbmc/linux/Documentation/security/keys/
H A Decryptfs.rst9 either in kernel space or in user space with a daemon called 'ecryptfsd'. In
10 the former case the operation is performed directly by the kernel CryptoAPI
18 kernel key of the 'user' type, inserted in the user's session specific keyring
20 'ecryptfs-utils'.
26 kernel and protected by the parent master key.
28 In order to avoid known-plaintext attacks, the datablob obtained through
38 kernel level.
42 keyctl add encrypted name "new ecryptfs key-type:master-key-name keylen" ring
44 keyctl update keyid "update key-type:master-key-name"
49 key-type:= 'trusted' | 'user'
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/openbmc/linux/arch/mips/sgi-ip27/
H A Dip27-klnuma.c1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright 2000 - 2001 Silicon Graphics, Inc.
5 * Copyright 2000 - 2001 Kanoj Sarcar (kanoj@sgi.com)
10 #include <linux/kernel.h>
21 #include "ip27-common.h"
26 * XXX - This needs to be much smarter about where it puts copies of the
27 * kernel. For example, we should never put a copy on a headless node,
32 /* Set only the master cnode's bit. The master cnode is always 0. */ in setup_replication_mask()
38 #error Kernel replication works with mapped kernel support. No calias support. in setup_replication_mask()
46 /* Advertise that we have a copy of the kernel */ in setup_replication_mask()
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/openbmc/linux/Documentation/gpu/
H A Ddrm-uapi.rst9 addition, drivers export device-specific interfaces for use by userspace
10 drivers & device-aware applications through ioctls and sysfs files.
16 Cover generic ioctls and sysfs layout here. We only need high-level
22 .. kernel-doc:: drivers/gpu/drm/drm_ioctl.c
28 Primary Nodes, DRM Master and Authentication
31 .. kernel-doc:: drivers/gpu/drm/drm_auth.c
32 :doc: master and authentication
34 .. kernel-doc:: drivers/gpu/drm/drm_auth.c
37 .. kernel-doc:: include/drm/drm_auth.h
46 .. kernel-doc:: drivers/gpu/drm/drm_lease.c
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/openbmc/qemu/tests/unit/
H A Dtest-crypto-secret.c56 int fd = g_file_open_tmp("qemu-test-crypto-secret-XXXXXX", in test_secret_indirect_good()
93 "file", "does-not-exist", in test_secret_indirect_badfile()
104 int fd = g_file_open_tmp("qemu-test-crypto-secretXXXXXX", in test_secret_indirect_emptyfile()
235 * We don't know yet if this due a bug in the Linux kernel or
237 * We've requested information from kernel maintainers.
247 g_test_skip("TODO: Need response from Linux kernel maintainers"); in test_secret_keyring_bad_key_access_right()
392 Object *master = object_new_with_props( in test_secret_crypt_raw() local
395 "master", in test_secret_crypt_raw()
408 "keyid", "master", in test_secret_crypt_raw()
418 object_unparent(master); in test_secret_crypt_raw()
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