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/Linux-v6.6/Documentation/admin-guide/hw-vuln/
D	core-scheduling.rst	1 .. SPDX-License-Identifier: GPL-2.0 15 ---------------- 16 A cross-HT attack involves the attacker and victim running on different Hyper 18 full mitigation of cross-HT attacks is to disable Hyper Threading (HT). Core 19 scheduling is a scheduler feature that can mitigate some (not all) cross-HT 21 user-designated trusted group can share a core. This increase in core sharing 27 core involves additional overhead - especially when the system is lightly 29 scheduling to perform more poorly compared to SMT-disabled, where N_CPUS is the 33 ----- 35 Using this feature, userspace defines groups of tasks that can be co-scheduled [all …]
D	srso.rst	1 .. SPDX-License-Identifier: GPL-2.0 8 known scenario of poisoning CPU functional units - the Branch Target 9 Buffer (BTB) and Return Address Predictor (RAP) in this case - and then 14 Return Address Stack/Return Stack Buffer). In some cases, a non-architectural 20 but the concern is that an attacker can mis-train the CPU BTB to predict 21 non-architectural CALL instructions in kernel space and use this to 23 leading to information disclosure via a speculative side-channel. 25 The issue is tracked under CVE-2023-20569. 28 ------------------- 30 AMD Zen, generations 1-4. That is, all families 0x17 and 0x19. Older [all …]
/Linux-v6.6/Documentation/arch/arm64/
D	memory-tagging-extension.rst	8 Date: 2020-02-25 18 (Top Byte Ignore) feature and allows software to access a 4-bit 19 allocation tag for each 16-byte granule in the physical address space. 20 Such memory range must be mapped with the Normal-Tagged memory 21 attribute. A logical tag is derived from bits 59-56 of the virtual 29 When ``CONFIG_ARM64_MTE`` is selected and Memory Tagging Extension is 34 -------- 36 To access the allocation tags, a user process must enable the Tagged 40 ``PROT_MTE`` - Pages allow access to the MTE allocation tags. 43 user address space and preserved on copy-on-write. ``MAP_SHARED`` is [all …]
/Linux-v6.6/Documentation/ABI/stable/
D	sysfs-driver-firmware-zynqmp	1 What: /sys/devices/platform/firmware\:zynqmp-firmware/ggs* 11 The register is reset during system or power-on 17 # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0 18 # echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0 22 # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0 23 # echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0 27 What: /sys/devices/platform/firmware\:zynqmp-firmware/pggs* 38 This register is only reset by the power-on reset 46 # cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0 47 # echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0 [all …]
/Linux-v6.6/arch/
D	Kconfig	1 # SPDX-License-Identifier: GPL-2.0 12 menu "General architecture-dependent options" 17 Select if the architecture can check permissions at sub-page 27 # Selected by HOTPLUG_CORE_SYNC_DEAD or HOTPLUG_CORE_SYNC_FULL 31 # Basic CPU dead synchronization selected by architecture 36 # Full CPU synchronization with alive state selected by architecture 63 for kernel debugging, non-intrusive instrumentation and testing. 72 makes certain almost-always-true or almost-always-false branch 75 Certain performance-sensitive kernel code, such as trace points, 89 ( On 32-bit x86, the necessary options added to the compiler [all …]
/Linux-v6.6/Documentation/usb/
D	gadget_printer.rst	24 This driver is structured for printer firmware that runs in user mode. The 25 user mode printer firmware will read and write data from the kernel mode 28 user space firmware can read or write this status byte using a device file 29 /dev/g_printer . Both blocking and non-blocking read/write calls are supported. 97 gcc prn_example.c -o prn_example 103 # prn_example -read_data 108 # cat data_file \| prn_example -write_data 113 # prn_example -get_status 116 Printer is NOT Selected 121 To set printer to Selected/On-line:: [all …]
/Linux-v6.6/drivers/staging/media/av7110/
D	video_types.rst	`1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 10 .. _video-format-t: 18 .. code-block:: c 33 .. _video-displayformat-t: 44 .. code-block:: c 55 .. _video-stream-source-t: 62 from an internal (demuxer) or external (user write) source. 65 .. code-block:: c 69 VIDEO_SOURCE_MEMORY /* If this source is selected, the stream 70 comes from the user through the write [all …]`
D	video-select-source.rst	`1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 11 ---- 18 -------- 25 --------- 27 .. flat-table:: 28 :header-rows: 0 29 :stub-columns: 0 31 - .. row 1 33 - int fd 35 - File descriptor returned by a previous call to open(). [all …]`
/Linux-v6.6/drivers/thermal/intel/
D	Kconfig	1 # SPDX-License-Identifier: GPL-2.0-only 11 enforce idle time which results in more package C-state residency. The 12 user interface is exposed via generic thermal framework. 32 two trip points which can be set by user to get notifications via thermal 56 be set by user mode programs to get notifications via Linux thermal 65 temperature sensor (DTS). For X1000 SoC, it has one on-die DTS. 114 selected, hardware provides guidance to the operating system on 117 conditions of the system such power and thermal limits. If selected,
/Linux-v6.6/Documentation/trace/coresight/
D	coresight-config.rst	1 .. SPDX-License-Identifier: GPL-2.0 14 programming of the CoreSight system with pre-defined configurations that 17 Many CoreSight components can be programmed in complex ways - especially ETMs. 30 -------- 41 accesses in the driver - the resource usage and parameter descriptions 55 A parameter value is a named value that may be set by the user prior to the 64 if the user does not supply a new value. 67 system - which is described below. 74 -------------- 77 session where the configuration is selected. For any trace session only one [all …]
/Linux-v6.6/Documentation/arch/ia64/
D	serial.rst	16 - Firmware on some machines (mostly from HP) provides an HCDP 18 as a serial console. If the user specified "console=ttyS0" 23 - If there was no HCDP, we assumed there were UARTs at the 34 For example, an HP rx1600 with a single built-in serial port 39 Type MMIO pre-2.6.10 pre-2.6.10 2.6.10+ 63 - If your firmware supplies the HCDP, it is simplest to 71 - Without an HCDP, Linux defaults to a VGA console unless you 89 this if the user supplies an argument like "console=uart,io,0x3f8", 98 - You specified "console=ttyS0" but Linux changed the device 102 - The EFI console path contains both a VGA device and a UART. [all …]
/Linux-v6.6/tools/perf/Documentation/
D	perf-config.txt	`1 perf-config(1) 5 ---- 6 perf-config - Get and set variables in a configuration file. 9 -------- 11 'perf config' [<file-option>] [section.name[=value] ...] 13 'perf config' [<file-option>] -l \| --list 16 ----------- 20 ------- 22 -l:: 23 --list:: [all …]`
/Linux-v6.6/Documentation/bpf/
D	prog_sk_lookup.rst	1 .. SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 55 hashtable-based lookup, while ``SK_DROP`` causes the transport layer to drop the 68 1. If any program returned ``SK_PASS`` and selected a valid socket, the socket 70 2. If more than one program returned ``SK_PASS`` and selected a socket, the last 73 selected a socket, socket lookup fails. 74 4. If all programs returned ``SK_PASS`` and none of them selected a socket, 87 * the socket that has been selected with ``bpf_sk_assign()``. 89 Refer to ``struct bpf_sk_lookup`` declaration in ``linux/bpf.h`` user API 90 header, and `bpf-helpers(7) 91 <https://man7.org/linux/man-pages/man7/bpf-helpers.7.html>`_ man-page section
/Linux-v6.6/lib/
D	Kconfig	1 # SPDX-License-Identifier: GPL-2.0-only 31 converting bitfields between a CPU-usable representation and a 33 - Is little endian (bytes are reversed within a 32-bit group) 34 - The least-significant 32-bit word comes first (within a 64-bit 36 - The most significant bit of a byte is at its right (bit 0 of a 50 This option enables the use of hardware bit-reversal instructions on 93 bool "Access I/O in non-MMIO mode" 99 mechanism, the host-local I/O resource can be mapped into system 101 system can access the I/O devices with the mapped-logic PIO through 112 This is selected by other options/architectures to provide the [all …]
/Linux-v6.6/Documentation/crypto/
D	userspace-if.rst	1 User Space Interface 5 ------------ 8 applicable to the user space interface as well. Therefore, the kernel 9 crypto API high level discussion for the in-kernel use cases applies 12 The major difference, however, is that user space can only act as a 16 The following covers the user space interface exported by the kernel 18 be obtained from [1]. That library can be used by user space 21 Some details of the in-kernel kernel crypto API aspects do not apply to 22 user space, however. This includes the difference between synchronous 23 and asynchronous invocations. The user space API call is fully [all …]
/Linux-v6.6/security/
D	Kconfig	1 # SPDX-License-Identifier: GPL-2.0-only 17 If this option is not selected, no restrictions will be enforced 30 If this option is not selected, the default Linux security 67 implement per-packet access controls based on labels 68 derived from IPSec policy. Non-IPSec communications are 100 Intel TXT also helps solve real end user concerns about having 114 int "Low address space for LSM to protect from user allocation" 120 from userspace allocation. Keeping a user from writing to low pages 147 # https://github.com/llvm/llvm-project/issues/53645 178 default "/sbin/usermode-helper" [all …]
/Linux-v6.6/Documentation/leds/
D	leds-lp55xx.rst	`8 ----------- 14 Device attributes for user-space interface 50 - Maximum number of channels 51 - Reset command, chip enable command 52 - Chip specific initialization 53 - Brightness control register access 54 - Setting LED output current 55 - Program memory address access for running patterns 56 - Additional device specific attributes 63 This pattern data is saved as a file in the user-land or [all …]`
/Linux-v6.6/Documentation/userspace-api/media/v4l/
D	io.rst	1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 14 :c:func:`write()` function is automatically selected after opening a 19 with memory mapped or user buffers applications call the 23 application does not directly receive the image data. It is selected by 49 field-order
/Linux-v6.6/scripts/kconfig/lxdialog/
D	inputbox.c	1 // SPDX-License-Identifier: GPL-2.0+ 3 * inputbox.c -- implements the input box 16 static void print_buttons(WINDOW * dialog, int height, int width, int selected) in print_buttons() argument 18 int x = width / 2 - 11; in print_buttons() 19 int y = height - 2; in print_buttons() 21 print_button(dialog, " Ok ", y, x, selected == 0); in print_buttons() 22 print_button(dialog, " Help ", y, x + 14, selected == 1); in print_buttons() 24 wmove(dialog, y, x + 1 + 14 * selected); in print_buttons() 35 int input_x = 0, key = 0, button = -1; in dialog_inputbox() 46 if (getmaxy(stdscr) <= (height - INPUTBOX_HEIGTH_MIN)) in dialog_inputbox() [all …]
/Linux-v6.6/Documentation/admin-guide/media/
D	vivid.rst	1 .. SPDX-License-Identifier: GPL-2.0 13 Each input can be a webcam, TV capture device, S-Video capture device or an HDMI 14 capture device. Each output can be an S-Video output device or an HDMI output 23 - Support for read()/write(), MMAP, USERPTR and DMABUF streaming I/O. 24 - A large list of test patterns and variations thereof 25 - Working brightness, contrast, saturation and hue controls 26 - Support for the alpha color component 27 - Full colorspace support, including limited/full RGB range 28 - All possible control types are present 29 - Support for various pixel aspect ratios and video aspect ratios [all …]
/Linux-v6.6/mm/
D	Kconfig	1 # SPDX-License-Identifier: GPL-2.0-only 33 compress them into a dynamically allocated RAM-based memory pool. 42 If selected, the compressed cache for swap pages will be enabled 52 If selected, exclusive loads for zswap will be enabled at boot, 62 swapped out again, it will be re-compressed. 195 zsmalloc is a slab-based memory allocator designed to store 210 int "Maximum number of physical pages per-zspage" 243 If you cannot migrate to SLUB, please contact linux-mm@kvack.org 312 sanity-checking than others. This option is most effective with 326 Try running: slabinfo -DA [all …]
/Linux-v6.6/Documentation/admin-guide/LSM/
D	apparmor.rst	`10 from user space. Tasks on the system that do not have a profile defined for 19 If AppArmor should be selected as the default security module then set:: 34 policy must be loaded into the kernel from user space (see the Documentation 45 Mailing List - apparmor@lists.ubuntu.com 47 Wiki - http://wiki.apparmor.net 49 User space tools - https://gitlab.com/apparmor 51 Kernel module - git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor`
/Linux-v6.6/Documentation/ABI/testing/
D	sysfs-bus-fcoe	4 Contact: Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org 12 fcoe_ctlr_device (ctlr_X). The user can then configure any 13 per-port settings and finally write to the fcoe_ctlr_device's 28 Contact: Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org 66 Initialization Protocol (FIP) Keep-Alives (FKA). 83 Contact: Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org 103 selected: 104 1 indicates that the switch has been selected for use; 117 The FIP Keep-Alive period 121 - "Unknown" - Initialization value [all …]
/Linux-v6.6/Documentation/devicetree/bindings/iio/magnetometer/
D	ti,tmag5273.yaml	1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 3 --- 5 $schema: http://devicetree.org/meta-schemas/core.yaml# 7 title: TI TMAG5273 Low-Power Linear 3D Hall-Effect Sensor 10 - Gerald Loacker <gerald.loacker@wolfvision.net> 13 The TI TMAG5273 is a low-power linear 3D Hall-effect sensor. This device 14 integrates three independent Hall-effect sensors in the X, Y, and Z axes. 19 on-axis and off-axis angle measurement topologies. The angle calculation is 20 performed using two user-selected magnetic axes. 29 "#io-channel-cells": [all …]
/Linux-v6.6/drivers/gpu/drm/
D	Kconfig	1 # SPDX-License-Identifier: GPL-2.0-only 19 # gallium uses SYS_kcmp for os_same_file_description() to de-duplicate 25 Kernel-level support for the Direct Rendering Infrastructure (DRI) 64 Use dynamic-debug to avoid drm_debug_enabled() runtime overheads. 95 Documentation/dev-tools/kunit/. 129 contention. A history of each drm modeset lock path hitting -EDEADLK 161 In order to keep user-space compatibility, we want in certain 162 use-cases to keep leaking the fbdev physical address to the 163 user-space program handling the fbdev buffer. 181 /lib/firmware directory or one of the provided built-in [all …]

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