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| /Documentation/arch/riscv/ |
| D | uabi.rst | 1 .. SPDX-License-Identifier: GPL-2.0
3 RISC-V Linux User ABI
7 ------------------------------------
14 #. Single-letter extensions come first, in canonical order.
17 #. All multi-letter extensions will be separated from other extensions by an
21 single-letter extensions and before any higher-privileged extensions.
29 #. Standard supervisor-level extensions (starting with 'S') will be listed
30 after standard unprivileged extensions. If multiple supervisor-level
33 #. Standard machine-level extensions (starting with 'Zxm') will be listed
34 after any lower-privileged, standard extensions. If multiple machine-level
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| /Documentation/virt/kvm/x86/ |
| D | timekeeping.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 Timekeeping Virtualization for X86-Based Architectures
32 information relevant to KVM and hardware-based virtualization.
41 2.1. i8254 - PIT
42 ----------------
46 channels which can be programmed to deliver periodic or one-shot interrupts.
53 The PIT uses I/O ports 0x40 - 0x43. Access to the 16-bit counters is done
59 -------------- ----------------
61 | 1.1932 MHz|---------->| CLOCK OUT | ---------> IRQ 0
63 -------------- | +->| GATE TIMER 0 |
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| /Documentation/filesystems/ |
| D | tmpfs.rst | 1 .. SPDX-License-Identifier: GPL-2.0
21 fly using a remount ('mount -o remount ...') of the filesystem. A tmpfs
50 set, the user visible part of tmpfs is not built. But the internal
72 4) And probably a lot more I do not know about :-)
80 oversize your tmpfs instances the machine will deadlock
85 machine with highmem) the number of lowmem RAM pages,
97 use up all the memory on the machine; but enhances the scalability of
101 extended attributes: "df -i"'s IUsed and IUse% increase, IFree decreases.
124 See also Documentation/admin-guide/mm/transhuge.rst, which describes the
150 quota entry for user/group/project id is being accessed - typically the
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| D | overlayfs.rst | 1 .. SPDX-License-Identifier: GPL-2.0
10 overlay-filesystem functionality in Linux (sometimes referred to as
11 union-filesystems). An overlay-filesystem tries to present a
17 ---------------
25 While directories will report an st_dev from the overlay-filesystem,
26 non-directory objects may report an st_dev from the lower filesystem or
29 over the lifetime of a non-directory object. Many applications and
48 The "xino" feature can be enabled with the "-o xino=on" overlay mount option.
51 the lifetime of the filesystem. The "-o xino=auto" overlay mount option
60 +--------------+------------+------------+-----------------+----------------+
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| D | ext2.rst | 1 .. SPDX-License-Identifier: GPL-2.0
18 set using tune2fs(8). Kernel-determined defaults are indicated by (*).
34 errors=remount-ro Remount the filesystem read-only on an error.
35 errors=panic Panic and halt the machine if an error occurs.
40 nouid32 Use 16-bit UIDs and GIDs.
84 ------
93 ------------
110 --------------
137 machines without having to know what machine it was created on.
140 ------
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| /Documentation/driver-api/usb/ |
| D | gadget.rst | 11 This document presents a Linux-USB "Gadget" kernel mode API, for use
17 - Supports USB 2.0, for high speed devices which can stream data at
20 - Handles devices with dozens of endpoints just as well as ones with
21 just two fixed-function ones. Gadget drivers can be written so
24 - Flexible enough to expose more complex USB device capabilities such
28 - USB "On-The-Go" (OTG) support, in conjunction with updates to the
29 Linux-USB host side.
31 - Sharing data structures and API models with the Linux-USB host side
32 API. This helps the OTG support, and looks forward to more-symmetric
36 - Minimalist, so it's easier to support new device controller hardware.
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| /Documentation/virt/uml/ |
| D | user_mode_linux_howto_v2.rst | 1 .. SPDX-License-Identifier: GPL-2.0
13 Welcome to User Mode Linux
15 User Mode Linux is the first Open Source virtualization platform (first
25 Most OSes today have built-in support for a number of "fake"
27 User Mode Linux takes this concept to the ultimate extreme - there
30 concepts which map onto something provided by the host - files, sockets,
36 The UML kernel is just a process running on Linux - same as any other
40 host machine assists UML in intercepting everything the program running
49 Why Would I Want User Mode Linux?
53 * If User Mode Linux kernel crashes, your host kernel is still fine. It
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| /Documentation/arch/m68k/ |
| D | kernel-options.rst | 9 Author: Roman.Hodek@informatik.uni-erlangen.de (Roman Hodek)
11 Update: jds@kom.auc.dk (Jes Sorensen) and faq@linux-m68k.org (Chris Lawrence)
58 ----------
76 /dev/ram: -> 0x0100 (initial ramdisk)
77 /dev/hda: -> 0x0300 (first IDE disk)
78 /dev/hdb: -> 0x0340 (second IDE disk)
79 /dev/sda: -> 0x0800 (first SCSI disk)
80 /dev/sdb: -> 0x0810 (second SCSI disk)
81 /dev/sdc: -> 0x0820 (third SCSI disk)
82 /dev/sdd: -> 0x0830 (forth SCSI disk)
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| /Documentation/gpu/ |
| D | drm-uapi.rst | 9 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
31 .. kernel-doc:: drivers/gpu/drm/drm_auth.c
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
49 Open-Source Userspace Requirements
57 open-sourced userspace patches, and those patches must be reviewed and ready for
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| /Documentation/core-api/ |
| D | cpu_hotplug.rst | 26 A more novel use of CPU-hotplug support is its use today in suspend resume
27 support for SMP. Dual-core and HT support makes even a laptop run SMP kernels
75 from the map depending on the event is hot-add/hot-remove. There are currently
80 be read-only for most use. When setting up per-cpu resources almost always use
94 $ ls -lh /sys/devices/system/cpu
96 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu0
97 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu1
98 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu2
99 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu3
100 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu4
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| D | dma-api-howto.rst | 10 with example pseudo-code. For a concise description of the API, see
11 Documentation/core-api/dma-api.rst.
39 supports 64-bit addresses for main memory and PCI BARs, it may use an IOMMU
40 so devices only need to use 32-bit DMA addresses.
49 +-------+ +------+ +------+
52 C +-------+ --------> B +------+ ----------> +------+ A
54 +-----+ | | | | bridge | | +--------+
55 | | | | +------+ | | | |
58 +-----+ +-------+ +------+ +------+ +--------+
60 X +-------+ --------> Y +------+ <---------- +------+ Z
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| /Documentation/devicetree/bindings/riscv/ |
| D | extensions.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR MIT)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: RISC-V ISA extensions
10 - Paul Walmsley <paul.walmsley@sifive.com>
11 - Palmer Dabbelt <palmer@sifive.com>
12 - Conor Dooley <conor@kernel.org>
15 RISC-V has a large number of extensions, some of which are "standard"
16 extensions, meaning they are ratified by RISC-V International, and others
36 Identifies the specific RISC-V instruction set architecture
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| /Documentation/networking/device_drivers/ethernet/cirrus/ |
| D | cs89x0.rst | 1 .. SPDX-License-Identifier: GPL-2.0
33 2.1 CS8900-based Adapter Configuration
34 2.2 CS8920-based Adapter Configuration
40 4.2 Compiling the driver to support memory mode
46 5.2.1 Diagnostic Self-Test
66 The CS8900-based ISA Ethernet Adapters from Cirrus Logic follow
67 IEEE 802.3 standards and support half or full-duplex operation in ISA bus
69 in 16-bit ISA or EISA bus expansion slots and are available in
70 10BaseT-only or 3-media configurations (10BaseT, 10Base2, and AUI for 10Base-5
73 CS8920-based adapters are similar to the CS8900-based adapter with additional
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| /Documentation/virt/kvm/ |
| D | api.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 The Definitive KVM (Kernel-based Virtual Machine) API Documentation
11 of a virtual machine. The ioctls belong to the following classes:
13 - System ioctls: These query and set global attributes which affect the
17 - VM ioctls: These query and set attributes that affect an entire virtual
18 machine, for example memory layout. In addition a VM ioctl is used to
24 - vcpu ioctls: These query and set attributes that control the operation
32 - device ioctls: These query and set attributes that control the operation
80 facility that allows backward-compatible extensions to the API to be
104 the ioctl returns -ENOTTY.
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| /Documentation/networking/ |
| D | bonding.rst | 1 .. SPDX-License-Identifier: GPL-2.0
11 Corrections, HA extensions: 2000/10/03-15:
13 - Willy Tarreau <willy at meta-x.org>
14 - Constantine Gavrilov <const-g at xpert.com>
15 - Chad N. Tindel <ctindel at ieee dot org>
16 - Janice Girouard <girouard at us dot ibm dot com>
17 - Jay Vosburgh <fubar at us dot ibm dot com>
22 - Mitch Williams <mitch.a.williams at intel.com>
29 The behavior of the bonded interfaces depends upon the mode; generally
35 the original tools from extreme-linux and beowulf sites will not work
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| D | ip-sysctl.rst | 1 .. SPDX-License-Identifier: GPL-2.0
10 ip_forward - BOOLEAN
11 - 0 - disabled (default)
12 - not 0 - enabled
20 ip_default_ttl - INTEGER
25 ip_no_pmtu_disc - INTEGER
26 Disable Path MTU Discovery. If enabled in mode 1 and a
27 fragmentation-required ICMP is received, the PMTU to this
33 In mode 2 incoming Path MTU Discovery messages will be
34 discarded. Outgoing frames are handled the same as in mode 1,
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| /Documentation/admin-guide/sysctl/ |
| D | vm.rst | 13 ------------------------------------------------------------------------------
27 - admin_reserve_kbytes
28 - compact_memory
29 - compaction_proactiveness
30 - compact_unevictable_allowed
31 - dirty_background_bytes
32 - dirty_background_ratio
33 - dirty_bytes
34 - dirty_expire_centisecs
35 - dirty_ratio
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| /Documentation/admin-guide/mm/ |
| D | memory-hotplug.rst | 14 memory available to a machine at runtime. In the simplest case, it consists of
20 - The physical memory available to a machine can be adjusted at runtime, up- or
25 - Replacing hardware, such as DIMMs or whole NUMA nodes, without downtime. One
28 - Reducing energy consumption either by physically unplugging memory modules or
32 used to expose persistent memory, other performance-differentiated memory and
39 ------------------------------
54 ------------------------
67 phase, the memory is visible in memory statistics, such as free and total
71 --------------------------
81 longer visible in memory statistics of the system.
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| /Documentation/driver-api/ |
| D | parport-lowlevel.rst | 5 :Time-stamp: <2000-02-24 13:30:20 twaugh>
34 Port functions (can be overridden by low-level drivers):
37 port->ops->read_data
38 port->ops->write_data
39 port->ops->read_status
40 port->ops->read_control
41 port->ops->write_control
42 port->ops->frob_control
43 port->ops->enable_irq
44 port->ops->disable_irq
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| /Documentation/arch/x86/ |
| D | resctrl.rst | 1 .. SPDX-License-Identifier: GPL-2.0
9 :Authors: - Fenghua Yu <fenghua.yu@intel.com>
10 - Tony Luck <tony.luck@intel.com>
11 - Vikas Shivappa <vikas.shivappa@intel.com>
31 Historically, new features were made visible by default in /proc/cpuinfo. This
38 # mount -t resctrl resctrl [-o cdp[,cdpl2][,mba_MBps][,debug]] /sys/fs/resctrl
57 pseudo-locking is a unique way of using cache control to "pin" or
59 "Cache Pseudo-Locking".
96 own settings for cache use which can over-ride
128 Corresponding region is pseudo-locked. No
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| /Documentation/admin-guide/ |
| D | kernel-parameters.txt | 16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nospcr -- disable console in ACPI SPCR table as
41 If set to vendor, prefer vendor-specific driver
45 If set to native, use the device's native backlight mode.
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| /Documentation/driver-api/gpio/ |
| D | driver.rst | 26 between 0 and n-1, n being the number of GPIOs managed by the chip.
29 example if a system uses a memory-mapped set of I/O-registers where 32 GPIO
30 lines are handled by one bit per line in a 32-bit register, it makes sense to
35 line is never made visible outside of the driver.
44 So for example one platform could use global numbers 32-159 for GPIOs, with a
46 global numbers 0..63 with one set of GPIO controllers, 64-79 with another type
47 of GPIO controller, and on one particular board 80-95 with an FPGA. The legacy
49 2000-2063 to identify GPIO lines in a bank of I2C GPIO expanders.
60 - methods to establish GPIO line direction
61 - methods used to access GPIO line values
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| /Documentation/admin-guide/laptops/ |
| D | thinkpad-acpi.rst | 9 - Borislav Deianov <borislav@users.sf.net>
10 - Henrique de Moraes Holschuh <hmh@hmh.eng.br>
12 http://ibm-acpi.sf.net/
19 This driver used to be named ibm-acpi until kernel 2.6.21 and release
20 0.13-20070314. It used to be in the drivers/acpi tree, but it was
21 moved to the drivers/misc tree and renamed to thinkpad-acpi for kernel
25 The driver is named "thinkpad-acpi". In some places, like module
29 "tpacpi" is used as a shorthand where "thinkpad-acpi" would be too
33 ------
38 - Fn key combinations
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| /Documentation/scsi/ |
| D | ChangeLog.lpfc | 2 * Please read the associated RELEASE-NOTES file !!!
8 * Fixed build warning for 2.6.12-rc2 kernels: mempool_alloc now
19 * Removed FC_TRANSPORT_PATCHESxxx defines. They're in 2.6.12-rc1.
26 * Added PCI ID for LP10000-S.
31 * Zero-out response sense length in lpfc_scsi_prep_cmnd to prevent
33 - was causing spurious 0710 messages.
55 - stop using volatile. if you need special ordering use memory
57 - switch lpfc_sli_pcimem_bcopy to take void * arguments.
58 - remove typecast for constants - a U postfix marks them
60 - add a MAILBOX_CMD_SIZE macro, as most users of
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| /Documentation/trace/ |
| D | events.rst | 24 ---------------------------------
59 ---------------------------
82 - 0 - all events this file affects are disabled
83 - 1 - all events this file affects are enabled
84 - X - there is a mixture of events enabled and disabled
85 - ? - this file does not affect any event
88 ---------------
92 trace_event=[event-list]
94 event-list is a comma separated list of events. See section 2.1 for event
97 3. Defining an event-enabled tracepoint
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