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/Documentation/devicetree/bindings/net/
Dmaxlinear,gpy2xx.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Andrew Lunn <andrew@lunn.ch>
11 - Michael Walle <michael@walle.cc>
14 - $ref: ethernet-phy.yaml#
17 maxlinear,use-broken-interrupts:
19 Interrupts are broken on some GPY2xx PHYs in that they keep the
23 interrupts are disabled for this PHY and polling mode is used. If one
31 maxlinear,use-broken-interrupts: [ interrupts ]
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/Documentation/devicetree/bindings/soc/fsl/cpm_qe/qe/
Ducc.txt4 - device_type : should be "network", "hldc", "uart", "transparent"
6 - compatible : could be "ucc_geth" or "fsl_atm" and so on.
7 - cell-index : the ucc number(1-8), corresponding to UCCx in UM.
8 - reg : Offset and length of the register set for the device
9 - interrupts : <a b> where a is the interrupt number and b is a
14 - pio-handle : The phandle for the Parallel I/O port configuration.
15 - port-number : for UART drivers, the port number to use, between 0 and 3.
18 CPM UART driver, the port-number is required for the QE UART driver.
19 - soft-uart : for UART drivers, if specified this means the QE UART device
20 driver should use "Soft-UART" mode, which is needed on some SOCs that have
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/Documentation/devicetree/bindings/mtd/
Djedec,spi-nor.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/mtd/jedec,spi-nor.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rob Herring <robh@kernel.org>
13 - $ref: mtd.yaml#
14 - $ref: /schemas/spi/spi-peripheral-props.yaml#
19 - items:
20 - pattern: "^((((micron|spansion|st),)?\
33 - const: jedec,spi-nor
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/Documentation/devicetree/bindings/serial/
D8250.yaml3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - devicetree@vger.kernel.org
13 - $ref: serial.yaml#
14 - $ref: /schemas/memory-controllers/mc-peripheral-props.yaml#
15 - if:
17 - required:
18 - aspeed,lpc-io-reg
19 - required:
20 - aspeed,lpc-interrupts
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/Documentation/devicetree/bindings/i2c/
Dmarvell,mv64xxx-i2c.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/i2c/marvell,mv64xxx-i2c.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Gregory CLEMENT <gregory.clement@bootlin.com>
15 - const: allwinner,sun4i-a10-i2c
16 - items:
17 - const: allwinner,sun7i-a20-i2c
18 - const: allwinner,sun4i-a10-i2c
19 - const: allwinner,sun6i-a31-i2c
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/Documentation/devicetree/bindings/timer/
Darm,arch_timer_mmio.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Marc Zyngier <marc.zyngier@arm.com>
11 - Mark Rutland <mark.rutland@arm.com>
17 The memory mapped timer is attached to a GIC to deliver its interrupts via SPIs.
22 - enum:
23 - arm,armv7-timer-mem
29 '#address-cells':
32 '#size-cells':
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Darm,arch_timer.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Marc Zyngier <marc.zyngier@arm.com>
11 - Mark Rutland <mark.rutland@arm.com>
13 ARM cores may have a per-core architected timer, which provides per-cpu timers,
17 The per-core architected timer is attached to a GIC to deliver its
18 per-processor interrupts via PPIs. The memory mapped timer is attached to a GIC
19 to deliver its interrupts via SPIs.
24 - items:
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/Documentation/admin-guide/blockdev/
Dfloppy.rst19 Example: If your kernel is called linux-2.6.9, type the following line
22 linux-2.6.9 floppy=thinkpad
25 of linux-2.6.9::
31 linux-2.6.9 floppy=daring floppy=two_fdc
43 If you use the floppy driver as a module, use the following syntax::
81 0x370, and if you use the 'cmos' option.
84 Tells the floppy driver that you have a Thinkpad. Thinkpads use an
91 Tells the floppy driver not to use Dma for data transfers.
96 and is thus harder to find, whereas non-dma buffers may be
99 later are OK. You also need at least a 486 to use nodma.
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/Documentation/devicetree/bindings/interrupt-controller/
Darm,gic-v3.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/interrupt-controller/arm,gic-v3.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Marc Zyngier <maz@kernel.org>
14 Peripheral Interrupts (PPI), Shared Peripheral Interrupts (SPI),
15 Software Generated Interrupts (SGI), and Locality-specific Peripheral
16 Interrupts (LPI).
19 - $ref: /schemas/interrupt-controller.yaml#
24 - items:
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/Documentation/accel/qaic/
Dqaic.rst1 .. SPDX-License-Identifier: GPL-2.0-only
10 Interrupts chapter
14 --------------------
21 non-empty and generate MSIs at a rate equivalent to the speed of the
37 generates 100k IRQs per second (per /proc/interrupts) is reduced to roughly 64
42 ---------------
51 when only one MSI has been configured and directs the interrupts for the DBCs
57 If the DBC is configured to force MSI interrupts, this can circumvent the
72 QAIC handles and enforces the required little endianness and 64-bit alignment,
76 The terminate transaction is of particular use to QAIC. QAIC is not aware of
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/Documentation/networking/
Dnetdevices.rst1 .. SPDX-License-Identifier: GPL-2.0
17 If device has registered successfully, it will be freed on last use
33 --------------
41 .. code-block:: c
50 return -ENOMEM;
87 ----------------------------
91 will want to make use of struct net_device's ``needs_free_netdev``
96 .. code-block:: c
100 dev->needs_free_netdev = true;
105 some_obj_destroy(priv->obj);
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Dnetconsole.rst1 .. SPDX-License-Identifier: GPL-2.0
29 It can be used either built-in or as a module. As a built-in,
41 netconsole=[+][r][src-port]@[src-ip]/[<dev>],[tgt-port]@<tgt-ip>/[tgt-macaddr]
46 src-port source for UDP packets (defaults to 6665)
47 src-ip source IP to use (interface address)
49 tgt-port port for logging agent (6666)
50 tgt-ip IP address for logging agent
51 tgt-macaddr ethernet MAC address for logging agent (broadcast)
71 Built-in netconsole starts immediately after the TCP stack is
82 On distributions using a BSD-based netcat version (e.g. Fedora,
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/Documentation/virt/hyperv/
Dvmbus.rst1 .. SPDX-License-Identifier: GPL-2.0
5 VMBus is a software construct provided by Hyper-V to guest VMs. It
7 devices that Hyper-V presents to guest VMs. The control path is
11 and the synthetic device implementation that is part of Hyper-V, and
12 signaling primitives to allow Hyper-V and the guest to interrupt
17 establishes the VMBus control path with the Hyper-V host, then
21 Most synthetic devices offered by Hyper-V have a corresponding Linux
29 * PCI device pass-thru
34 * Key/Value Pair (KVP) exchange with Hyper-V
35 * Hyper-V online backup (a.k.a. VSS)
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/Documentation/arch/x86/x86_64/
Dboot-options.rst1 .. SPDX-License-Identifier: GPL-2.0
39 Do not opt-in to Local MCE delivery. Use legacy method
55 Don't overwrite the bios-set CMCI threshold. This boot option
62 Force-enable recoverable machine check code paths
73 Use IO-APIC. Default
76 Don't use the IO-APIC.
79 Don't use the local APIC
82 Don't use the local APIC (alias for i386 compatibility)
85 See Documentation/arch/x86/i386/IO-APIC.rst
91 Don't check the IO-APIC timer. This can work around
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/Documentation/power/
Dswsusp.rst47 - If you feel ACPI works pretty well on your system, you might try::
51 - If you would like to write hibernation image to swap and then suspend
56 - If you have SATA disks, you'll need recent kernels with SATA suspend
58 are built into kernel -- not modules. [There's way to make
68 - The resume process checks for the presence of the resume device,
72 - The resume process may be triggered in two ways:
81 read-only) otherwise data may be corrupted.
87 Last revised: 2003-10-20 by Pavel Machek
90 -------------------------
114 There are three different interfaces you can use, /proc/acpi should
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Dbasic-pm-debugging.rst21 modes causes the PM core to skip some platform-related callbacks which on ACPI
32 with broken BIOSes. In such cases the "shutdown" mode of hibernation might
45 ----------------------------
47 To find out why hibernation fails on your system, you can use a special testing
53 - test the freezing of processes
56 - test the freezing of processes and suspending of devices
59 - test the freezing of processes, suspending of devices and platform
63 - test the freezing of processes, suspending of devices, platform
67 - test the freezing of processes, suspending of devices, platform global
76 To use one of them it is necessary to write the corresponding string to
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/Documentation/driver-api/
Dipmi.rst12 standardized database for field-replaceable units (FRUs) and a watchdog
15 To use this, you need an interface to an IPMI controller in your
17 management software that can use the IPMI system.
19 This document describes how to use the IPMI driver for Linux. If you
25 -------------
32 No matter what, you must pick 'IPMI top-level message handler' to use
35 The message handler does not provide any user-level interfaces.
36 Kernel code (like the watchdog) can still use it. If you need access
50 these enabled and let the drivers auto-detect what is present.
61 "The SMBus Driver" on how to hand-configure your system.
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/Documentation/trace/
Dtimerlat-tracer.rst6 find sources of wakeup latencies of real-time threads. Like cyclictest,
13 -----
28 # _-----=> irqs-off
29 # / _----=> need-resched
30 # | / _---=> hardirq/softirq
31 # || / _--=> preempt-depth
34 # TASK-PID CPU# |||| TIMESTAMP ID CONTEXT LATENCY
36 <idle>-0 [000] d.h1 54.029328: #1 context irq timer_latency 932 ns
37 <...>-867 [000] .... 54.029339: #1 context thread timer_latency 11700 ns
38 <idle>-0 [001] dNh1 54.029346: #1 context irq timer_latency 2833 ns
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/Documentation/gpu/amdgpu/display/
Ddcn-overview.rst10 .. kernel-figure:: dc_pipeline_overview.svg
19 * **Display Pipe and Plane (DPP)**: This block provides pre-blend pixel
24 multiple planes, using global or per-pixel alpha.
38 * **Multi-Media HUB (MMHUBBUB)**: Memory controller interface for DMCUB and DWB
42 interrupts the controller to the SOC host interrupt unit. This block includes
43 the Display Micro-Controller Unit - version B (DMCUB), which is handled via
84 ----------------------
86 Display pipeline can be broken down into two components that are usually
100 a one-to-one mapping of the link encoder to PHY, but we can configure the DCN
106 ---------
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/Documentation/devicetree/bindings/mmc/
Dmmc-controller.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/mmc/mmc-controller.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Ulf Hansson <ulf.hansson@linaro.org>
25 "#address-cells":
30 "#size-cells":
37 broken-cd:
42 cd-gpios:
47 non-removable:
[all …]
/Documentation/virt/kvm/
Dlocking.rst1 .. SPDX-License-Identifier: GPL-2.0
8 ---------------------
12 - cpus_read_lock() is taken outside kvm_lock
14 - kvm_usage_lock is taken outside cpus_read_lock()
16 - kvm->lock is taken outside vcpu->mutex
18 - kvm->lock is taken outside kvm->slots_lock and kvm->irq_lock
20 - kvm->slots_lock is taken outside kvm->irq_lock, though acquiring
23 - kvm->mn_active_invalidate_count ensures that pairs of
25 use the same memslots array. kvm->slots_lock and kvm->slots_arch_lock
27 must not take either kvm->slots_lock or kvm->slots_arch_lock.
[all …]
/Documentation/admin-guide/
Dkernel-parameters.txt16 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
35 2: use 2nd APIC table, if available
36 1,0: use 1st APIC table
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/Documentation/filesystems/
Dfuse.rst1 .. SPDX-License-Identifier: GPL-2.0
18 Non-privileged mount (or user mount):
19 A userspace filesystem mounted by a non-privileged (non-root) user.
45 non-privileged mounts. This opens up new possibilities for the use of
70 The file descriptor to use for communication between the userspace
111 mount -t fusectl none /sys/fs/fuse/connections
124 no filesystem activity and 'waiting' is non-zero, then the
140 - If the request is not yet sent to userspace AND the signal is
144 - If the request is not yet sent to userspace AND the signal is not
149 - If the request is already sent to userspace, then an INTERRUPT
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/Documentation/dev-tools/
Dkgdb.rst11 interface to the debug core. It is possible to use either of the
15 Kdb is simplistic shell-style interface which you can use on a system
16 console with a keyboard or serial console. You can use it to inspect
22 kernel built-ins or in kernel modules if the code was built with
29 similar to the way an application developer would use gdb to debug an
40 kgdb I/O modules compiled as built-ins or loadable kernel modules in the
46 - In order to enable compilation of kdb, you must first enable kgdb.
48 - The kgdb test compile options are described in the kgdb test suite
52 ------------------------------
55 :menuselection:`Kernel hacking --> Kernel debugging` and select
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/Documentation/virt/uml/
Duser_mode_linux_howto_v2.rst1 .. SPDX-License-Identifier: GPL-2.0
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
29 we use the correct term 100% paravirtual. All UML devices are abstract
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
57 * You can run a usermode kernel as a non-root user (you may need to
94 There is no UML installer in any distribution. While you can use off
96 package, there is no UML equivalent. You have to use appropriate tools on
99 This is extremely easy on Debian - you can do it using debootstrap. It is
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