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/Documentation/devicetree/bindings/interrupt-controller/
Dapple,aic.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/interrupt-controller/apple,aic.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Apple Interrupt Controller
10 - Hector Martin <marcan@marcan.st>
13 The Apple Interrupt Controller is a simple interrupt controller present on
19 - Level-triggered hardware IRQs wired to SoC blocks
20 - Single mask bit per IRQ
21 - Per-IRQ affinity setting
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Dapple,aic2.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/interrupt-controller/apple,aic2.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Apple Interrupt Controller 2
10 - Hector Martin <marcan@marcan.st>
13 The Apple Interrupt Controller 2 is a simple interrupt controller present on
18 - Level-triggered hardware IRQs wired to SoC blocks
19 - Single mask bit per IRQ
20 - Automatic masking on event delivery (auto-ack)
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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#
7 title: ARM Generic Interrupt Controller, version 3
10 - Marc Zyngier <maz@kernel.org>
15 Software Generated Interrupts (SGI), and Locality-specific Peripheral
19 - $ref: /schemas/interrupt-controller.yaml#
24 - items:
25 - enum:
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Dbrcm,bcm6345-l1-intc.txt1 Broadcom BCM6345-style Level 1 interrupt controller
3 This block is a first level interrupt controller that is typically connected
8 - 32, 64 or 128 incoming level IRQ lines
10 - Most onchip peripherals are wired directly to an L1 input
12 - A separate instance of the register set for each CPU, allowing individual
15 - Contains one or more enable/status word pairs per CPU
17 - No atomic set/clear operations
19 - No polarity/level/edge settings
21 - No FIFO or priority encoder logic; software is expected to read all
22 2-4 status words to determine which IRQs are pending
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Dbrcm,bcm7038-l1-intc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/interrupt-controller/brcm,bcm7038-l1-intc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Broadcom BCM7038-style Level 1 interrupt controller
10 This block is a first level interrupt controller that is typically connected
11 directly to one of the HW INT lines on each CPU. Every BCM7xxx set-top chip
16 - 64, 96, 128, or 160 incoming level IRQ lines
18 - Most onchip peripherals are wired directly to an L1 input
20 - A separate instance of the register set for each CPU, allowing individual
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/Documentation/devicetree/bindings/arm/
Dpmu.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Mark Rutland <mark.rutland@arm.com>
11 - Will Deacon <will.deacon@arm.com>
16 representation in the device tree should be done as under:-
21 - enum:
22 - apm,potenza-pmu
23 - apple,avalanche-pmu
24 - apple,blizzard-pmu
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/Documentation/virt/hyperv/
Dvpci.rst1 .. SPDX-License-Identifier: GPL-2.0
3 PCI pass-thru devices
5 In a Hyper-V guest VM, PCI pass-thru devices (also called
16 Hyper-V terminology for vPCI devices is "Discrete Device
17 Assignment" (DDA). Public documentation for Hyper-V DDA is
20 …tps://learn.microsoft.com/en-us/windows-server/virtualization/hyper-v/plan/plan-for-deploying-devi…
23 and for GPUs. A similar mechanism for NICs is called SR-IOV
25 driver to interact directly with the hardware. See Hyper-V
26 public documentation here: `SR-IOV`_
28 .. _SR-IOV: https://learn.microsoft.com/en-us/windows-hardware/drivers/network/overview-of-single-r…
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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/virt/kvm/devices/
Darm-vgic-v3.rst1 .. SPDX-License-Identifier: GPL-2.0
4 ARM Virtual Generic Interrupt Controller v3 and later (VGICv3)
9 - KVM_DEV_TYPE_ARM_VGIC_V3 ARM Generic Interrupt Controller v3.0
12 will act as the VM interrupt controller, requiring emulated user-space devices
23 KVM_VGIC_V3_ADDR_TYPE_DIST (rw, 64-bit)
28 KVM_VGIC_V3_ADDR_TYPE_REDIST (rw, 64-bit)
35 KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION (rw, 64-bit)
38 bits: | 63 .... 52 | 51 .... 16 | 15 - 12 |11 - 0
41 - index encodes the unique redistributor region index
42 - flags: reserved for future use, currently 0
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/Documentation/networking/
Dscaling.rst1 .. SPDX-License-Identifier: GPL-2.0
13 multi-processor systems.
17 - RSS: Receive Side Scaling
18 - RPS: Receive Packet Steering
19 - RFS: Receive Flow Steering
20 - Accelerated Receive Flow Steering
21 - XPS: Transmit Packet Steering
28 (multi-queue). On reception, a NIC can send different packets to different
33 generally known as “Receive-side Scaling” (RSS). The goal of RSS and
35 Multi-queue distribution can also be used for traffic prioritization, but
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Dpktgen.rst1 .. SPDX-License-Identifier: GPL-2.0
7 Enable CONFIG_NET_PKTGEN to compile and build pktgen either in-kernel
9 running, pktgen creates a thread for each CPU with affinity to that CPU.
31 overload type of benchmarking, as this could hurt the normal use-case.
35 # ethtool -G ethX tx 1024
44 ring-buffers for various performance reasons, and packets stalling
49 and the cleanup interval is affected by the ethtool --coalesce setting
50 of parameter "rx-usecs".
54 # ethtool -C ethX rx-usecs 30
59 Pktgen creates a thread for each CPU with affinity to that CPU.
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/Documentation/devicetree/bindings/powerpc/fsl/
Dmpic.txt2 Freescale MPIC Interrupt Controller Node
6 The Freescale MPIC interrupt controller is found on all PowerQUICC
9 additional cells in the interrupt specifier defining interrupt type
14 - compatible
22 - reg
24 Value type: <prop-encoded-array>
29 - interrupt-controller
32 Definition: Specifies that this node is an interrupt
35 - #interrupt-cells
38 Definition: Shall be 2 or 4. A value of 2 means that interrupt
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/Documentation/admin-guide/hw-vuln/
Dl1tf.rst1 L1TF - L1 Terminal Fault
10 -------------------
15 - Processors from AMD, Centaur and other non Intel vendors
17 - Older processor models, where the CPU family is < 6
19 - A range of Intel ATOM processors (Cedarview, Cloverview, Lincroft,
22 - The Intel XEON PHI family
24 - Intel processors which have the ARCH_CAP_RDCL_NO bit set in the
33 ------------
38 CVE-2018-3615 L1 Terminal Fault SGX related aspects
39 CVE-2018-3620 L1 Terminal Fault OS, SMM related aspects
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/Documentation/networking/device_drivers/ethernet/freescale/
Ddpaa.rst1 .. SPDX-License-Identifier: GPL-2.0
8 - Madalin Bucur <madalin.bucur@nxp.com>
9 - Camelia Groza <camelia.groza@nxp.com>
13 - DPAA Ethernet Overview
14 - DPAA Ethernet Supported SoCs
15 - Configuring DPAA Ethernet in your kernel
16 - DPAA Ethernet Frame Processing
17 - DPAA Ethernet Features
18 - DPAA IRQ Affinity and Receive Side Scaling
19 - Debugging
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/Documentation/devicetree/bindings/soc/ti/
Dkeystone-navigator-qmss.txt5 multi-core Navigator. QMSS consist of queue managers, packed-data structure
9 management of the packet queues. Packets are queued/de-queued by writing or
20 - compatible : Must be "ti,keystone-navigator-qmss".
21 : Must be "ti,66ak2g-navss-qm" for QMSS on K2G SoC.
22 - clocks : phandle to the reference clock for this device.
23 - queue-range : <start number> total range of queue numbers for the device.
24 - linkram0 : <address size> for internal link ram, where size is the total
26 - linkram1 : <address size> for external link ram, where size is the total
29 - qmgrs : child node describing the individual queue managers on the
32 -- managed-queues : the actual queues managed by each queue manager
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/Documentation/ABI/stable/
Dsysfs-driver-ib_srp1 What: /sys/class/infiniband_srp/srp-<hca>-<port_number>/add_target
4 Contact: linux-rdma@vger.kernel.org
7 a comma-separated list of login parameters to this sysfs
10 * id_ext, a 16-digit hexadecimal number specifying the eight
11 byte identifier extension in the 16-byte SRP target port
14 * ioc_guid, a 16-digit hexadecimal number specifying the eight
15 byte I/O controller GUID portion of the 16-byte target port
17 * dgid, a 32-digit hexadecimal number specifying the
19 * pkey, a four-digit hexadecimal number specifying the
21 * service_id, a 16-digit hexadecimal number specifying the
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Dsysfs-class-infiniband2 -------------------------------------------------
9 Contact: linux-rdma@vger.kernel.org
24 Contact: linux-rdma@vger.kernel.org
34 Contact: linux-rdma@vger.kernel.org
39 What: /sys/class/infiniband/<device>/ports/<port-num>/lid
40 What: /sys/class/infiniband/<device>/ports/<port-num>/rate
41 What: /sys/class/infiniband/<device>/ports/<port-num>/lid_mask_count
42 What: /sys/class/infiniband/<device>/ports/<port-num>/sm_sl
43 What: /sys/class/infiniband/<device>/ports/<port-num>/sm_lid
44 What: /sys/class/infiniband/<device>/ports/<port-num>/state
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/Documentation/arch/arm64/
Dacpi_object_usage.rst16 - Required: DSDT, FADT, GTDT, MADT, MCFG, RSDP, SPCR, XSDT
18 - Recommended: BERT, EINJ, ERST, HEST, PCCT, SSDT
20 - Optional: AGDI, BGRT, CEDT, CPEP, CSRT, DBG2, DRTM, ECDT, FACS, FPDT,
24 - Not supported: AEST, APMT, BOOT, DBGP, DMAR, ETDT, HPET, IVRS, LPIT,
41 This table describes a non-maskable event, that is used by the platform
68 Optional, not currently supported, with no real use-case for an
83 time as ARM-compatible hardware is available, and the specification
151 UEFI-based; if it is UEFI-based, this table may be supplied. When this
167 the hardware reduced profile, and only 64-bit address fields will
184 filled in properly - that the PSCI_COMPLIANT flag is set and that
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/Documentation/networking/device_drivers/ethernet/intel/
Dice.rst1 .. SPDX-License-Identifier: GPL-2.0+
8 Copyright(c) 2018-2021 Intel Corporation.
13 - Overview
14 - Identifying Your Adapter
15 - Important Notes
16 - Additional Features & Configurations
17 - Performance Optimization
28 This driver supports XDP (Express Data Path) and AF_XDP zero-copy. Note that
43 -------------------------------------------
54 1) Make sure that your system's physical memory is in a high-performance
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Di40e.rst1 .. SPDX-License-Identifier: GPL-2.0+
8 Copyright(c) 1999-2018 Intel Corporation.
13 - Overview
14 - Identifying Your Adapter
15 - Intel(R) Ethernet Flow Director
16 - Additional Configurations
17 - Known Issues
18 - Support
47 ----------------------
49 …intel.com/content/dam/www/public/us/en/documents/release-notes/xl710-ethernet-controller-feature-m…
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Dixgbe.rst1 .. SPDX-License-Identifier: GPL-2.0+
8 Copyright(c) 1999-2018 Intel Corporation.
13 - Identifying Your Adapter
14 - Command Line Parameters
15 - Additional Configurations
16 - Known Issues
17 - Support
36 ----------------------------------
38 82599-BASED ADAPTERS
41 - If your 82599-based Intel(R) Network Adapter came with Intel optics or is an
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/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
41 If set to vendor, prefer vendor-specific driver
73 Documentation/firmware-guide/acpi/debug.rst for more information about
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/Documentation/filesystems/
Dproc.rst1 .. SPDX-License-Identifier: GPL-2.0
24 1.1 Process-Specific Subdirectories
36 3 Per-Process Parameters
37 3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj - Adjust the oom-killer
39 3.2 /proc/<pid>/oom_score - Display current oom-killer score
40 3.3 /proc/<pid>/io - Display the IO accounting fields
41 3.4 /proc/<pid>/coredump_filter - Core dump filtering settings
42 3.5 /proc/<pid>/mountinfo - Information about mounts
44 3.7 /proc/<pid>/task/<tid>/children - Information about task children
45 3.8 /proc/<pid>/fdinfo/<fd> - Information about opened file
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/Documentation/RCU/
DwhatisRCU.rst3 What is RCU? -- "Read, Copy, Update"
21 …ries: Fundamentals https://www.linuxfoundation.org/webinars/unraveling-rcu-usage-mysteries
22 …Cases https://www.linuxfoundation.org/webinars/unraveling-rcu-usage-mysteries-additional-use-cases
28 during the 2.5 development effort that is optimized for read-mostly
47 :ref:`6. ANALOGY WITH READER-WRITER LOCKING <6_whatisRCU>`
67 everything, feel free to read the whole thing -- but if you are really
69 never need this document anyway. ;-)
74 ----------------
103 b. Wait for all previous readers to complete their RCU read-side
112 use much lighter-weight synchronization, in some cases, absolutely no
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/Documentation/admin-guide/cgroup-v1/
Dcpusets.rst11 - Portions Copyright (c) 2004-2006 Silicon Graphics, Inc.
12 - Modified by Paul Jackson <pj@sgi.com>
13 - Modified by Christoph Lameter <cl@linux.com>
14 - Modified by Paul Menage <menage@google.com>
15 - Modified by Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
41 ----------------------
45 an on-line node that contains memory.
54 Documentation/admin-guide/cgroup-v1/cgroups.rst.
57 include CPUs in its CPU affinity mask, and using the mbind(2) and
73 ----------------------------
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