| /linux/Documentation/admin-guide/ |
| H A D | kernel-parameters.rst | 1 .. SPDX-License-Identifier: GPL-2.0
5 The kernel's command-line parameters
8 The following is a consolidated list of the kernel parameters as implemented
14 The kernel parses parameters from the kernel command line up to "``--``";
16 parameter gets passed to init: parameters with '=' go into init's
18 Everything after "``--``" is passed as an argument to init.
20 Module parameters can be specified in two ways: via the kernel command
23 (kernel command line) usbcore.blinkenlights=1
26 Parameters for modules which are built into the kernel need to be
27 specified on the kernel command line. modprobe looks through the
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| /linux/Documentation/driver-api/dmaengine/ |
| H A D | dmatest.rst | 21 capability of the following: DMA_MEMCPY (memory-to-memory), DMA_MEMSET
22 (const-to-memory or memory-to-memory, when emulated), DMA_XOR, DMA_PQ.
26 dmaengine@vger.kernel.org.
28 Part 1 - How to build the test module
33 Device Drivers -> DMA Engine support -> DMA Test client
36 be built as module or inside kernel. Let's consider those cases.
38 Part 2 - When dmatest is built as a module
48 % echo 2000 > /sys/module/dmatest/parameters/timeout
49 % echo 1 > /sys/module/dmatest/parameters/iterations
50 % echo dma0chan0 > /sys/module/dmatest/parameters/channel
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| /linux/Documentation/virt/kvm/devices/ |
| H A D | vm.rst | 1 .. SPDX-License-Identifier: GPL-2.0
9 struct kvm_device_attr as other devices, but targets VM-wide settings
21 -------------------------------------------
23 :Parameters: none
24 :Returns: -EBUSY if a vcpu is already defined, otherwise 0
29 ----------------------------------------
31 :Parameters: none
32 :Returns: -EINVAL if CMMA was not enabled;
39 -----------------------------------------
41 :Parameters: in attr->addr the address for the new limit of guest memory
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| /linux/include/linux/ |
| H A D | execmem.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
18 * enum execmem_type - types of executable memory ranges
22 * permissions, alignment and other parameters for memory that can be used
25 * and let architectures define parameters for ranges suitable for
28 * @EXECMEM_DEFAULT: default parameters that would be used for types that
30 * @EXECMEM_MODULE_TEXT: parameters for module text sections
31 * @EXECMEM_KPROBES: parameters for kprobes
32 * @EXECMEM_FTRACE: parameters for ftrace
33 * @EXECMEM_BPF: parameters for BPF
34 * @EXECMEM_MODULE_DATA: parameters for module data sections
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| /linux/fs/pstore/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
17 int "Default kernel log storage space" if EXPERT
21 Defines default size of pstore kernel log storage.
38 bool "Log kernel console messages"
41 When the option is enabled, pstore will log all kernel
51 data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID].
61 With this option kernel traces function calls into a persistent
82 For more information, see Documentation/admin-guide/ramoops.rst.
101 For more information, see Documentation/admin-guide/pstore-blk.rst
117 of partition - device number of disk plus the partition number
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| /linux/Documentation/scsi/ |
| H A D | scsi-parameters.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 SCSI Kernel Parameters
7 See Documentation/admin-guide/kernel-parameters.rst for general information on
8 specifying module parameters.
11 ``modinfo -p ${modulename}`` shows a current list of all parameters of a loadable
12 module. Loadable modules, after being loaded into the running kernel, also
13 reveal their parameters in /sys/module/${modulename}/parameters/. Some of these
14 parameters may be changed at runtime by the command
15 ``echo -n ${value} > /sys/module/${modulename}/parameters/${parm}``.
51 Should be between 1 and 2^32-1.
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| /linux/Documentation/admin-guide/device-mapper/ |
| H A D | dm-crypt.rst | 2 dm-crypt
5 Device-Mapper's "crypt" target provides transparent encryption of block devices
6 using the kernel crypto API.
8 For a more detailed description of supported parameters see:
11 Parameters::
21 cipher[:keycount]-chainmode-ivmode[:ivopts]
25 aes-cbc-essiv:sha256
26 aes-xts-plain64
27 serpent-xts-plain64
29 Cipher format also supports direct specification with kernel crypt API
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| /linux/tools/testing/selftests/mm/ |
| H A D | test_vmalloc.sh | 2 # SPDX-License-Identifier: GPL-2.0
6 # This is a test script for the kernel test driver to analyse vmalloc
7 # allocator. Therefore it is just a kernel module loader. You can specify
8 # and pass different parameters in order to:
14 NUM_CPUS=`grep -c ^processor /proc/cpuinfo`
22 # Kselftest framework requirement - SKIP code is 4.
27 # Also it is possible to pass any supported parameters manualy.
37 uid=$(id -
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| /linux/Documentation/ABI/stable/ |
| H A D | sysfs-module | 5 The name of the module that is in the kernel. This
7 dynamic module. If it is built directly into the kernel, it
11 Note: The conditions of creation in the built-in case are not
14 What: /sys/module/<MODULENAME>/parameters
17 individual parameters of the module that are able to be
19 documentation as to the contents of these parameters and
26 stability of the different parameters.
30 If the module is able to be unloaded from the kernel, this file
33 Note: If the module is built into the kernel, or if the
34 CONFIG_MODULE_UNLOAD kernel configuration value is not enabled,
|
| /linux/Documentation/misc-devices/ |
| H A D | xilinx_sdfec.rst | 1 .. SPDX-License-Identifier: GPL-2.0+
4 Xilinx SD-FEC Driver
10 This driver supports SD-FEC Integrated Block for Zynq |Ultrascale+ (TM)| RFSoCs.
15 …f SD-FEC core features, see the `SD-FEC Product Guide (PG256) <https://www.xilinx.com/cgi-bin/docs…
19 - Retrieval of the Integrated Block configuration and status information
20 - Configuration of LDPC codes
21 - Configuration of Turbo decoding
22 - Monitoring errors
24 Missing features, known issues, and limitations of the SD-FEC driver are as
27 - Only allows a single open file handler to any instance of the driver at any time
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| /linux/Documentation/networking/ |
| H A D | netconsole.rst | 1 .. SPDX-License-Identifier: GPL-2.0
14 Extended console support by Tejun Heo <tj@kernel.org>, May 1 2015
25 This module logs kernel printk messages over UDP allowing debugging of
28 It can be used either built-in or as a module. As a built-in,
31 capture of early kernel panics, it does capture most of the boot
40 netconsole=[+][r][src-port]@[src-ip]/[<dev>],[tgt-port]@<tgt-ip>/[tgt-macaddr]
44 r if present, prepend kernel version (release) to the message
45 src-port source for UDP packets (defaults to 6665)
46 src-ip source IP to use (interface address)
48 tgt-port port for logging agent (6666)
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| /linux/Documentation/arch/arm/ |
| H A D | setup.rst | 2 Kernel initialisation parameters on ARM Linux
5 The following document describes the kernel initialisation parameter
9 This structure is used to pass initialisation parameters from the
10 kernel loader to the Linux kernel proper, and may be short lived
11 through the kernel initialisation process. As a general rule, it
12 should not be referenced outside of arch/arm/kernel/setup.c:setup_arch().
14 There are a lot of parameters listed in there, and they are described
19 will be checked by the kernel.
33 Various kernel flags, including:
77 is non-contiguous from the processors point of view.
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| /linux/Documentation/virt/kvm/ |
| H A D | api.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 The Definitive KVM (Kernel-based Virtual Machine) API Documentation
24 - System ioctls: These query and set global attributes which affect the
28 - VM ioctls: These query and set attributes that affect an entire virtual
35 - vcpu ioctls: These query and set attributes that control the operation
43 - device ioctls: These query and set attributes that control the operation
92 facility that allows backward-compatible extensions to the API to be
110 which means that is will be provided by any kernel that supports
122 Parameters:
123 what parameters are accepted by the ioctl.
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| /linux/tools/testing/selftests/livepatch/ |
| H A D | functions.sh | 2 # SPDX-License-Identifier: GPL-2.0
9 SYSFS_KERNEL_DIR="/sys/kernel"
13 if [[ -e /sys/kernel/tracing/trace ]]; then
19 # Kselftest framework requirement - SKIP code is 4
22 # log(msg) - write message to kernel log
23 # msg - insightful words
28 # skip(msg) - testing can't proceed
29 # msg - explanation
38 uid=$(id -u)
39 if [ $uid -ne 0 ]; then
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| /linux/include/uapi/drm/ |
| H A D | tegra_drm.h | 1 /* SPDX-License-Identifier: MIT */
2 /* Copyright (c) 2012-2020 NVIDIA Corporation */
19 * struct drm_tegra_gem_create - parameters for the GEM object creation IOCTL
38 * The buffer has a bottom-up layout.
45 * The handle of the created GEM object. Set by the kernel upon
52 * struct drm_tegra_gem_mmap - parameters for the GEM mmap IOCTL
72 * The mmap offset for the given GEM object. Set by the kernel upon
79 * struct drm_tegra_syncpt_read - parameters for the read syncpoint IOCTL
92 * The current syncpoint value. Set by the kernel upon successful
99 * struct drm_tegra_syncpt_incr - parameters for the increment syncpoint IOCTL
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| /linux/Documentation/driver-api/crypto/iaa/ |
| H A D | iaa-crypto.rst | 1 .. SPDX-License-Identifier: GPL-2.0
18 higher-level compression devices such as zswap.
25 represented by selecting the 'deflate-iaa' crypto compression
28 # echo deflate-iaa > /sys/module/zswap/parameters/compressor
38 'deflate-iaa'. (Because the IAA hardware has a 4k history-window
52 Cryptographic API -> Hardware crypto devices -> Support for Intel(R) IAA Compression Accelerator
59 …Cryptographic API -> Hardware crypto devices -> Support for Intel(R) IAA Compression -> Enable Int…
78 - Scalable
79 - Legacy
80 - No IOMMU
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| /linux/drivers/net/wireless/marvell/mwifiex/ |
| H A D | README | 2 # Copyright 2011-2020 NXP
9 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
10 # worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
12 # THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
38 Following are some useful iw commands:-
45 iw dev mlan0 connect -w <SSID> [<freq in MHz>] [<bssid>] [key 0:abcde d:1123456789a]
55 iw dev mlan0 ibss join <SSID> <freq in MHz> [fixed-freq] [fixed-bssid] [key 0:abcde]
57 bssid and the security related parameters can be specified while joining/creating
64 The command will be used to get the connection status. The command will return parameters
79 mount -t debugfs debugfs /debugfs
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| /linux/rust/kernel/ |
| H A D | module_param.rs | 1 // SPDX-License-Identifier: GPL-2.0
3 //! Support for module parameters.
10 use kernel::sync::SetOnce;
19 pub const fn new(val: bindings::kernel_param) -> Self { in new()
24 // SAFETY: C kernel handles serializing access to this type. We never access it
28 /// Types that can be used for module parameters.
32 fn try_from_param_arg(arg: &BStr) -> Result<Self>; in try_from_param_arg()
37 /// Used to set the parameter value at kernel initialization, when loading
44 /// - If `val` is non-null then it must point to a valid null-terminated string that must be valid
46 /// - `param` must be a pointer to a `bindings::kernel_param` initialized by the rust module macro.
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| /linux/Documentation/ABI/testing/ |
| H A D | configfs-most | 1 What: /sys/kernel/config/most_<component>
8 configfs in /sys/kernel/config directory use:
9 # mount -t configfs none /sys/kernel/config/
12 What: /sys/kernel/config/most_cdev/<link>
22 configure the sub-buffer size for this channel
55 pass parameters needed by some components
60 configuration, the creation is post-poned until
67 What: /sys/kernel/config/most_video/<link>
77 configure the sub-buffer size for this channel
110 pass parameters needed by some components
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| /linux/Documentation/admin-guide/blockdev/ |
| H A D | ramdisk.rst | 8 2) Kernel Command Line Parameters
14 -----------
18 in order to access the root filesystem (see Documentation/admin-guide/initrd.rst). It can
29 and (re)build the kernel.
40 2) Parameters
41 ---------------------------------
43 2a) Kernel Command Line Parameters
51 2b) Module parameters
63 ---------------
66 to set the boot device in a Linux kernel image.
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| /linux/Documentation/sound/designs/ |
| H A D | tracepoints.rst | 11 ALSA PCM core registers ``snd_pcm`` subsystem to kernel tracepoint system.
13 and for processing of PCM hardware parameters. These tracepoints are available
14 when corresponding kernel configurations are enabled. When ``CONFIG_SND_DEBUG``
19 ------------------------------------
24 Tracepoints for processing of PCM hardware parameters
25 -----------------------------------------------------
33 substream. In this procedure, PCM hardware parameters are decided by
35 the PCM substream keeps the parameters.
37 The parameters are described in struct snd_pcm_hw_params. This
38 structure includes several types of parameters. Applications set preferable
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| /linux/Documentation/networking/devlink/ |
| H A D | netdevsim.rst | 1 .. SPDX-License-Identifier: GPL-2.0
10 Parameters chapter
13 .. list-table:: Generic parameters implemented
15 * - Name
16 - Mode
17 * - ``max_macs``
18 - driverinit
20 The ``netdevsim`` driver also implements the following driver-specific
21 parameters.
23 .. list-table:: Driver-specific parameters implemented
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| /linux/Documentation/i2c/ |
| H A D | old-module-parameters.rst | 2 I2C device driver binding control from user-space in old kernels
7 found in kernel 2.6. If you work with more recent kernels, you can
10 Up to kernel 2.6.32, many I2C drivers used helper macros provided by
11 <linux/i2c.h> which created standard module parameters to let the user
13 parameters were known as ``probe`` (to let the driver probe for an extra
18 binding model, it became clear that these per-module parameters were no
20 sysfs-based interface is described in
21 Documentation/i2c/instantiating-devices.rst, section
22 "Method 4: Instantiate from user-space".
24 Below is a mapping from the old module parameters to the new interface.
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| /linux/scripts/ |
| H A D | Makefile.kasan | 1 # SPDX-License-Identifier: GPL-2.0
9 CFLAGS_KASAN_NOSANITIZE := -fno-builtin
14 cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1)))
15 rustc-param = $(call rustc-option, -Cllvm-args=-$(1),)
17 check-args = $(foreach arg,$(2),$(call $(1),$(arg)))
33 # kernel functions to be instrumented inline.
39 # First, enable -fsanitize=kernel-address together with providing the shadow
40 # mapping offset, as for GCC, -fasan-shadow-offset fails without -fsanitize
41 # (GCC accepts the shadow mapping offset via -fasan-shadow-offset instead of
42 # a --param like the other KASAN parameters).
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| /linux/Documentation/firmware-guide/acpi/ |
| H A D | debug.rst | 1 .. SPDX-License-Identifier: GPL-2.0
10 Compile-time configuration
14 config option is not set, the debug messages are not even built into the kernel.
16 Boot- and run-time configuration
20 you're interested in. At boot-time, use the acpi.debug_layer and
21 acpi.debug_level kernel command line options. After boot, you can use the
22 debug_layer and debug_level files in /sys/module/acpi/parameters/ to control
32 You can set the debug_layer mask at boot-time using the acpi.debug_layer
34 to /sys/module/acpi/parameters/debug_layer.
38 Reading /sys/module/acpi/parameters/debug_layer shows the supported mask values::
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