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/linux-6.8/Documentation/admin-guide/
Dkernel-per-CPU-kthreads.rst2 Reducing OS jitter due to per-cpu kthreads
5 This document lists per-CPU kthreads in the Linux kernel and presents
6 options to control their OS jitter. Note that non-per-CPU kthreads are
7 not listed here. To reduce OS jitter from non-per-CPU kthreads, bind
13 - Documentation/core-api/irq/irq-affinity.rst: Binding interrupts to sets of CPUs.
15 - Documentation/admin-guide/cgroup-v1: Using cgroups to bind tasks to sets of CPUs.
17 - man taskset: Using the taskset command to bind tasks to sets
20 - man sched_setaffinity: Using the sched_setaffinity() system
23 - /sys/devices/system/cpu/cpuN/online: Control CPU N's hotplug state,
26 - In order to locate kernel-generated OS jitter on CPU N:
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/linux-6.8/Documentation/ABI/testing/
Dsysfs-class-mic8 PCIe form factor add-in Coprocessor card based on the Intel Many
9 Integrated Core (MIC) architecture that runs a Linux OS.
26 MIC device. For example - "x100"
34 MIC device. For example - "A0" or "B0"
42 MIC device in the context of the card OS. Possible values that
47 "ready" The MIC device is ready to boot the card OS.
52 "booting" The MIC device has initiated booting a card OS.
54 "shutting_down" The card OS is shutting down.
55 "resetting" A reset has been initiated for the MIC device
60 operations depending upon the current state of the card OS.
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Dsysfs-driver-habanalabs64 on-board EEPROM
76 Description: Version of the firmware OS running on the device's CPU
82 Description: Interface to trigger a hard-reset operation for the device.
83 Hard-reset will reset ALL internal components of the device
90 Description: Displays how many times the device have undergone a hard-reset
177 value when a user-space process opens the device's file (unless
201 Description: Interface to trigger a soft-reset operation for the device.
202 Soft-reset will reset only the compute and DMA engines of the
209 Description: Displays how many times the device have undergone a soft-reset
218 * "operational" - Device is available for work.
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/linux-6.8/Documentation/devicetree/bindings/regulator/
Dregulator.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Liam Girdwood <lgirdwood@gmail.com>
11 - Mark Brown <broonie@kernel.org>
14 regulator-name:
18 regulator-min-microvolt:
21 regulator-max-microvolt:
24 regulator-microvolt-offset:
28 regulator-min-microamp:
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/linux-6.8/Documentation/devicetree/bindings/arm/
Dpsci.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
15 processors") can be used by Linux to initiate various CPU-centric power
25 r0 => 32-bit Function ID / return value
26 {r1 - r3} => Parameters
40 - description:
44 - description:
46 Function IDs are not required and should be ignored by an OS with
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/linux-6.8/arch/m68k/include/asm/
Damigaints.h2 ** amigaints.h -- Amiga Linux interrupt handling structs and prototypes
87 #define IF_SOFT 0x0004 /* software initiated interrupt */
104 ** these functions, they behave exactly like the amiga os routines
113 #endif /* asm-m68k/amigaints.h */
/linux-6.8/drivers/accel/ivpu/
Dvpu_boot_api.h1 /* SPDX-License-Identifier: MIT */
3 * Copyright (C) 2020-2023 Intel Corporation
12 * fw_bin_header->api_version[VPU_BOOT_API_VER_ID] = (VPU_BOOT_API_VER_MAJOR << 16) |
42 /* ------------ FW API version information end ---------------------*/
73 /* Space reserved for future preemption-related fields. */
91 /** VPU scheduling mode. By default, OS scheduling is used. */
194 /* Clock frequencies: 0x20 - 0xFF */
199 /* Memory regions: 0x100 - 0x1FF */
219 /* IRQ re-direct numbers: 0x200 - 0x2FF */
222 /* ARM -> VPU doorbell interrupt. ARM is notifying VPU of async command or compute job. */
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Dvpu_jsm_api.h1 /* SPDX-License-Identifier: MIT */
3 * Copyright (C) 2020-2023 Intel Corporation
72 /* Job status returned when the job was preempted mid-inference */
76 * Host <-> VPU IPC channels.
77 * ASYNC commands use a high priority channel, other messages use low-priority ones.
115 * same process with a relative in-process priority. Valid values for relative
116 * priority are given below - max and min.
119 #define VPU_HWS_COMMAND_QUEUE_MIN_IN_PROCESS_PRIORITY -7
190 * It is written by host before passing buffer to VPU. VPU should consider it read-only.
205 * 0 - context state change
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/linux-6.8/Documentation/sphinx/
Dkfigure.py1 # -*- coding: utf-8; mode: python -*-
14 handling from the author's POV. Directives like ``kernel-figure`` implement
15 methods *to* always get the best output-format even if some tools are not
19 * ``.. kernel-image``: for image handling / a ``.. image::`` replacement
21 * ``.. kernel-figure``: for figure handling / a ``.. figure::`` replacement
23 * ``.. kernel-render``: for render markup / a concept to embed *render*
26 - ``DOT``: render embedded Graphviz's **DOC**
27 - ``SVG``: render embedded Scalable Vector Graphics (**SVG**)
28 - ... *developable*
33 available, the DOT language is inserted as literal-block.
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/linux-6.8/drivers/usb/typec/
Dbus.c1 // SPDX-License-Identifier: GPL-2.0
3 * Bus for USB Type-C Alternate Modes
21 if (!alt->retimer) in typec_altmode_set_retimer()
24 state.alt = &alt->adev; in typec_altmode_set_retimer()
28 return typec_retimer_set(alt->retimer, &state); in typec_altmode_set_retimer()
36 if (!alt->mux) in typec_altmode_set_mux()
39 state.alt = &alt->adev; in typec_altmode_set_mux()
43 return typec_mux_set(alt->mux, &state); in typec_altmode_set_mux()
46 /* Wrapper to set various Type-C port switches together. */
62 bool is_port = is_typec_port(adev->dev.parent); in typec_altmode_set_state()
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/linux-6.8/drivers/usb/storage/
Dscsiglue.c1 // SPDX-License-Identifier: GPL-2.0+
7 * (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
10 * (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org)
20 * similar to commands in the SCSI-II and ATAPI specifications.
23 * exhibits class-specific exemptions from the USB specification.
32 #include <linux/dma-mapping.h>
65 return us->scsi_name; in host_info()
70 struct us_data *us = host_to_us(sdev->host); in slave_alloc()
77 sdev->inquiry_len = 36; in slave_alloc()
81 * We'll play it safe by requiring 512-byte alignment always. in slave_alloc()
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/linux-6.8/Documentation/scsi/
DChangeLog.megaraid_sas1 Release Date : Thu. Jun 19, 2014 17:00:00 PST 2014 -
2 (emaild-id:megaraidlinux@lsi.com)
7 Current Version : 06.803.02.00-rc1
8 Old Version : 06.803.01.00-rc1
14 -------------------------------------------------------------------------------
15 Release Date : Mon. Mar 10, 2014 17:00:00 PST 2014 -
16 (emaild-id:megaraidlinux@lsi.com)
20 Current Version : 06.803.01.00-rc1
21 Old Version : 06.700.06.00-rc1
25 4. Add Dell PowerEdge VRTX SR-IOV VF device support.
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/linux-6.8/Documentation/PCI/
Dpcieaer-howto.rst1 .. SPDX-License-Identifier: GPL-2.0
8 :Authors: - T. Long Nguyen <tom.l.nguyen@intel.com>
9 - Yanmin Zhang <yanmin.zhang@intel.com>
17 ----------------
26 ----------------------------
29 or on behalf of transactions initiated on the link. PCIe
41 - Gathers the comprehensive error information if errors occurred.
42 - Reports error to the users.
43 - Performs error recovery actions.
53 ------------------------------------------------------
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/linux-6.8/Documentation/devicetree/bindings/thermal/
Dthermal-zones.yaml1 # SPDX-License-Identifier: (GPL-2.0)
4 ---
5 $id: http://devicetree.org/schemas/thermal/thermal-zones.yaml#
6 $schema: http://devicetree.org/meta-schemas/base.yaml#
11 - Daniel Lezcano <daniel.lezcano@linaro.org>
20 - thermal-sensor: device that measures temperature, has SoC-specific bindings
21 - cooling-device: device used to dissipate heat either passively or actively
22 - thermal-zones: a container of the following node types used to describe all
25 This binding describes the thermal-zones.
27 The polling-delay properties of a thermal-zone are bound to the maximum dT/dt
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/linux-6.8/drivers/hid/intel-ish-hid/ipc/
Dipc.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (c) 2014-2016, Intel Corporation.
8 #include <linux/devm-helpers.h>
14 #include "hw-ish.h"
22 * ish_reg_read() - Read register
35 return readl(hw->mem_addr + offset); in ish_reg_read()
39 * ish_reg_write() - Write register
52 writel(value, hw->mem_addr + offset); in ish_reg_write()
56 * _ish_read_fw_sts_reg() - Read FW status register
69 * check_generated_interrupt() - Check if ISH interrupt
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/linux-6.8/drivers/net/fddi/skfp/
Dskfddi.c1 // SPDX-License-Identifier: GPL-2.0-or-later
41 * 02-Mar-98 CG Created.
43 * 10-Mar-99 CG Support for 2.2.x added.
44 * 25-Mar-99 CG Corrected IRQ routing for SMP (APIC)
45 * 26-Oct-99 CG Fixed compilation error on 2.2.13
46 * 12-Nov-99 CG Source code release
47 * 22-Nov-99 CG Included in kernel source.
48 * 07-May-00 DM 64 bit fixes, new dma interface
49 * 31-Jul-03 DB Audit copy_*_user in skfp_ioctl
51 * 03-Dec-03 SH Convert to PCI device model
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/linux-6.8/drivers/scsi/bfa/
Dbfa_fcpim.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
4 * Copyright (c) 2014- QLogic Corporation.
8 * Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter.
40 #define BFA_FCP_MOD(_hal) (&(_hal)->modules.fcp_mod)
41 #define BFA_MEM_FCP_KVA(__bfa) (&(BFA_FCP_MOD(__bfa)->kva_seg))
43 (&(_fcp)->iotag_arr[(_tag & BFA_IOIM_IOTAG_MASK)])
45 ((_fcp)->itn_arr + ((_tag) & ((_fcp)->num_itns - 1)))
64 (__itnim->ioprofile.iocomps[__index]++)
75 return BFA_IOBUCKET_MAX - 1; in bfa_ioim_get_index()
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/linux-6.8/Documentation/arch/powerpc/
Dultravisor.rst1 .. SPDX-License-Identifier: GPL-2.0
16 (PVR=0x004e1203) or greater will be PEF-capable. A new ISA release
25 +------------------+
29 +------------------+
31 +------------------+
33 +------------------+
35 +------------------+
75 +---+---+---+---------------+
79 +---+---+---+---------------+
80 | 1 | 0 | 0 | Privileged(OS)|
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/linux-6.8/arch/powerpc/platforms/pseries/
Drtas-fadump.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Firmware-Assisted Dump support on POWERVM platform.
22 #include <asm/fadump-internal.h>
24 #include "rtas-fadump.h"
32 fadump_conf->boot_mem_dest_addr = in rtas_fadump_update_config()
33 be64_to_cpu(fdm->rmr_region.destination_address); in rtas_fadump_update_config()
35 fadump_conf->fadumphdr_addr = (fadump_conf->boot_mem_dest_addr + in rtas_fadump_update_config()
36 fadump_conf->boot_memory_size); in rtas_fadump_update_config()
46 fadump_conf->boot_mem_addr[0] = in rtas_fadump_get_config()
47 be64_to_cpu(fdm->rmr_region.source_address); in rtas_fadump_get_config()
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Dmobility.c1 // SPDX-License-Identifier: GPL-2.0-only
50 #define PRRN_SCOPE -2
96 is_platfac = of_node_is_type(dn, "ibm,platform-facilities") || in delete_dt_node()
97 of_node_is_type(pdn, "ibm,platform-facilities"); in delete_dt_node()
101 * The drivers that bind to nodes in the platform-facilities in delete_dt_node()
126 * ibm,update-properties again to get the rest of the value. in update_dt_property()
137 char *new_data = kzalloc(new_prop->length + vd, GFP_KERNEL); in update_dt_property()
139 return -ENOMEM; in update_dt_property()
141 memcpy(new_data, new_prop->value, new_prop->length); in update_dt_property()
142 memcpy(new_data + new_prop->length, value, vd); in update_dt_property()
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/linux-6.8/tools/power/pm-graph/
DREADME8 pm-graph: suspend/resume/boot timing analysis tools
11 …Home Page: https://www.intel.com/content/www/us/en/developer/topic-technology/open/pm-graph/overvi…
13 Report bugs/issues at bugzilla.kernel.org Tools/pm-graph
14 - https://bugzilla.kernel.org/buglist.cgi?component=pm-graph&product=Tools
17 - Getting Started:
20 - Feature Summary:
21 https://www.intel.com/content/www/us/en/developer/topic-technology/open/pm-graph/features.html
23 - upstream version in git:
24 git clone https://github.com/intel/pm-graph/
27 - Overview
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/linux-6.8/tools/perf/pmu-events/arch/x86/haswellx/
Dhsx-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
39 "MetricExpr": "cstate_core@c7\\-residency@ / TSC",
46 "MetricExpr": "cstate_pkg@c7\\-residency@ / TSC",
90 …"BriefDescription": "Bandwidth of IO reads that are initiated by end device controllers that are r…
96 …"BriefDescription": "Bandwidth of IO writes that are initiated by end device controllers that are …
230 …"BriefDescription": "Uops delivered from legacy decode pipeline (Micro-instruction Translation Eng…
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/linux-6.8/Documentation/virt/kvm/x86/
Dtimekeeping.rst1 .. 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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/linux-6.8/tools/perf/pmu-events/arch/x86/broadwellx/
Dbdx-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / TSC",
11 "MetricExpr": "cstate_core@c3\\-residency@ / TSC",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / TSC",
25 "MetricExpr": "cstate_core@c6\\-residency@ / TSC",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / TSC",
39 "MetricExpr": "cstate_core@c7\\-residency@ / TSC",
46 "MetricExpr": "cstate_pkg@c7\\-residency@ / TSC",
90 …"BriefDescription": "Bandwidth of IO reads that are initiated by end device controllers that are r…
96 …"BriefDescription": "Bandwidth of IO writes that are initiated by end device controllers that are …
230 …"BriefDescription": "Uops delivered from legacy decode pipeline (Micro-instruction Translation Eng…
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/linux-6.8/drivers/misc/mei/
Dhbm.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2003-2022, Intel Corporation. All rights reserved.
68 * mei_cl_conn_status_to_errno - convert client connect response
79 case MEI_CL_CONN_NOT_FOUND: return -ENOTTY; in mei_cl_conn_status_to_errno()
80 case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY; in mei_cl_conn_status_to_errno()
81 case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY; in mei_cl_conn_status_to_errno()
82 case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL; in mei_cl_conn_status_to_errno()
83 case MEI_CL_CONN_NOT_ALLOWED: return -EBUSY; in mei_cl_conn_status_to_errno()
84 default: return -EINVAL; in mei_cl_conn_status_to_errno()
89 * mei_hbm_write_message - wrapper for sending hbm messages.
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