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/linux/Documentation/devicetree/bindings/cpu/
H A Didle-states.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/cpu/idle-states.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
11 - Anup Patel <anup@brainfault.org>
15 1 - Introduction
18 ARM and RISC-V systems contain HW capable of managing power consumption
19 dynamically, where cores can be put in different low-power states (ranging
22 run-time, can be specified through device tree bindings representing the
[all …]
H A Dcpu-capacity.txt6 1 - Introduction
15 2 - CPU capacity definition
19 heterogeneity. Such heterogeneity can come from micro-architectural differences
23 capture a first-order approximation of the relative performance of CPUs.
29 * A "single-threaded" or CPU affine benchmark
43 3 - capacity-dmips-mhz
46 capacity-dmips-mhz is an optional cpu node [1] property: u32 value
51 capacity-dmips-mhz property is all-or-nothing: if it is specified for a cpu
54 available, final capacities are calculated by directly using capacity-dmips-
58 4 - Examples
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/linux/fs/smb/server/mgmt/
H A Duser_session.c1 // SPDX-License-Identifier: GPL-2.0-or-later
27 unsigned int method; member
35 xa_for_each(&sess->ksmbd_chann_list, index, chann) { in free_channel_list()
36 xa_erase(&sess->ksmbd_chann_list, index); in free_channel_list()
40 xa_destroy(&sess->ksmbd_chann_list); in free_channel_list()
44 struct ksmbd_session_rpc *entry) in __session_rpc_close() argument
48 resp = ksmbd_rpc_close(sess, entry->id); in __session_rpc_close()
50 pr_err("Unable to close RPC pipe %d\n", entry->id); in __session_rpc_close()
53 ksmbd_rpc_id_free(entry->id); in __session_rpc_close()
54 kfree(entry); in __session_rpc_close()
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/linux/drivers/platform/x86/dell/
H A Ddell-wmi-ddv.c1 // SPDX-License-Identifier: GPL-2.0-or-later
36 #define DRIVER_NAME "dell-wmi-ddv"
40 #define DELL_DDV_GUID "8A42EA14-4F2A-FD45-6422-0087F7A7E608"
132 static int dell_wmi_ddv_query_type(struct wmi_device *wdev, enum dell_ddv_method method, u32 arg, in dell_wmi_ddv_query_type() argument
143 ret = wmidev_evaluate_method(wdev, 0x0, method, &in, &out); in dell_wmi_ddv_query_type()
145 return -EIO; in dell_wmi_ddv_query_type()
149 return -ENODATA; in dell_wmi_ddv_query_type()
151 if (obj->type != type) { in dell_wmi_ddv_query_type()
153 return -ENOMSG; in dell_wmi_ddv_query_type()
161 static int dell_wmi_ddv_query_integer(struct wmi_device *wdev, enum dell_ddv_method method, in dell_wmi_ddv_query_integer() argument
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/linux/Documentation/arch/powerpc/
H A Dbooting.rst1 .. SPDX-License-Identifier: GPL-2.0
4 ------------------
8 was decided to enforce some strict rules regarding the kernel entry and
9 bootloader <-> kernel interfaces, in order to avoid the degeneration that had
10 become the ppc32 kernel entry point and the way a new platform should be added
14 merged architecture for ppc32 and ppc64, new 32-bit platforms and 32-bit
19 of a device-tree whose format is defined after Open Firmware specification.
21 doesn't require the device-tree to represent every device in the system and only
34 Entry point
37 There is one single entry point to the kernel, at the start
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H A Dhvcs.rst24 3.1 Built-in:
55 major and minor numbers are associated with each vty-server. Directions
68 built into the kernel. If not, the default can be over-ridden by inserting
71 3.1 Built-in:
72 -------------
77 Device Drivers --->
78 Character devices --->
84 -----------
89 Device Drivers --->
90 Character devices --->
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/linux/Documentation/locking/
H A Dww-mutex-design.rst2 Wound/Wait Deadlock-Proof Mutex Design
5 Please read mutex-design.rst first, as it applies to wait/wound mutexes too.
7 Motivation for WW-Mutexes
8 -------------------------
37 and the deadlock handling approach is called Wait-Die. The name is based on
41 and dies. Hence Wait-Die.
42 There is also another algorithm called Wound-Wait:
46 transaction. Hence Wound-Wait.
48 However, the Wound-Wait algorithm is typically stated to generate fewer backoffs
49 compared to Wait-Die, but is, on the other hand, associated with more work than
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/linux/Documentation/devicetree/bindings/arm/
H A 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:
52 - const: arm,psci-0.2
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/linux/drivers/acpi/acpica/
H A Dutpredef.c1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
4 * Module Name: utpredef - support functions for predefined names
6 * Copyright (C) 2000 - 2023, Intel Corp.
33 * PARAMETERS: this_name - Entry in the predefined method/name table
35 * RETURN: Pointer to next entry in predefined table.
37 * DESCRIPTION: Get the next entry in the predefine method table. Handles the
38 * cases where a package info entry follows a method name that
49 * Skip next entry in the table if this name returns a Package in acpi_ut_get_next_predefined_method()
50 * (next entry contains the package info) in acpi_ut_get_next_predefined_method()
52 if ((this_name->info.expected_btypes & ACPI_RTYPE_PACKAGE) && in acpi_ut_get_next_predefined_method()
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H A Dnsarguments.c1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
4 * Module Name: nsarguments - Validation of args for ACPI predefined methods
6 * Copyright (C) 2000 - 2023, Intel Corp.
22 * PARAMETERS: info - Method execution information block
41 * Also, ignore typecheck if warnings/errors if this method in acpi_ns_check_argument_types()
42 * has already been evaluated at least once -- in order in acpi_ns_check_argument_types()
45 if (!info->predefined || (info->node->flags & ANOBJ_EVALUATED)) { in acpi_ns_check_argument_types()
49 arg_type_list = info->predefined->info.argument_list; in acpi_ns_check_argument_types()
54 for (i = 0; ((i < arg_count) && (i < info->param_count)); i++) { in acpi_ns_check_argument_types()
56 user_arg_type = info->parameters[i]->common.type; in acpi_ns_check_argument_types()
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/linux/drivers/net/wireless/intel/iwlwifi/fw/
H A Dacpi.c1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
4 * Copyright (C) 2019-2024 Intel Corporation
7 #include "iwl-drv.h"
8 #include "iwl-debug.h"
33 static int iwl_acpi_get_handle(struct device *dev, acpi_string method, in iwl_acpi_get_handle() argument
43 return -ENOENT; in iwl_acpi_get_handle()
46 status = acpi_get_handle(root_handle, method, ret_handle); in iwl_acpi_get_handle()
49 "ACPI: %s method not found\n", method); in iwl_acpi_get_handle()
50 return -ENOENT; in iwl_acpi_get_handle()
55 static void *iwl_acpi_get_object(struct device *dev, acpi_string method) in iwl_acpi_get_object() argument
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/linux/arch/arm64/boot/dts/sprd/
H A Dums9620.dtsi1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
8 #include <dt-bindings/interrupt-controller/arm-gic.h>
11 interrupt-parent = <&gic>;
12 #address-cells = <2>;
13 #size-cells = <2>;
16 #address-cells = <2>;
17 #size-cells = <0>;
19 cpu-map {
50 compatible = "arm,cortex-a55";
52 enable-method = "psci";
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/linux/drivers/scsi/isci/
H A Dremote_node_table.c7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
83 group_table = remote_node_table->remote_node_groups[group_table_index]; in sci_remote_node_table_get_group_index()
85 for (dword_index = 0; dword_index < remote_node_table->group_array_size; dword_index++) { in sci_remote_node_table_get_group_index()
106 * This method will clear the group index entry in the specified group index
119 BUG_ON(group_index >= (u32)(remote_node_table->group_array_size * 32)); in sci_remote_node_table_clear_group_index()
123 group_table = remote_node_table->remote_node_groups[group_table_index]; in sci_remote_node_table_clear_group_index()
136 * This method will set the group index bit entry in the specified gropu index
149 BUG_ON(group_index >= (u32)(remote_node_table->group_array_size * 32)); in sci_remote_node_table_set_group_index()
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/linux/drivers/platform/x86/
H A Dmsi-wmi-platform.c1 // SPDX-License-Identifier: GPL-2.0-or-later
27 #define DRIVER_NAME "msi-wmi-platform"
29 #define MSI_PLATFORM_GUID "ABBC0F6E-8EA1-11d1-00A0-C90629100000"
81 enum msi_wmi_platform_method method; member
121 if (obj->type != ACPI_TYPE_BUFFER) in msi_wmi_platform_parse_buffer()
122 return -ENOMSG; in msi_wmi_platform_parse_buffer()
124 if (obj->buffer.length != length) in msi_wmi_platform_parse_buffer()
125 return -EPROTO; in msi_wmi_platform_parse_buffer()
127 if (!obj->buffer.pointer[0]) in msi_wmi_platform_parse_buffer()
128 return -EIO; in msi_wmi_platform_parse_buffer()
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/linux/arch/arm64/boot/dts/arm/
H A Djuno-r2.dts9 /dts-v1/;
11 #include <dt-bindings/interrupt-controller/arm-gic.h>
12 #include <dt-bindings/arm/coresight-cti-dt.h>
13 #include "juno-base.dtsi"
14 #include "juno-cs-r1r2.dtsi"
18 compatible = "arm,juno-r2", "arm,juno", "arm,vexpress";
19 interrupt-parent = <&gic>;
20 #address-cells = <2>;
21 #size-cells = <2>;
28 stdout-path = "serial0:115200n8";
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H A Djuno.dts4 * Copyright (c) 2013-2014 ARM Ltd.
9 /dts-v1/;
11 #include <dt-bindings/interrupt-controller/arm-gic.h>
12 #include <dt-bindings/arm/coresight-cti-dt.h>
13 #include "juno-base.dtsi"
18 interrupt-parent = <&gic>;
19 #address-cells = <2>;
20 #size-cells = <2>;
27 stdout-path = "serial0:115200n8";
31 compatible = "arm,psci-0.2";
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H A Djuno-r1.dts9 /dts-v1/;
11 #include <dt-bindings/interrupt-controller/arm-gic.h>
12 #include <dt-bindings/arm/coresight-cti-dt.h>
13 #include "juno-base.dtsi"
14 #include "juno-cs-r1r2.dtsi"
18 compatible = "arm,juno-r1", "arm,juno", "arm,vexpress";
19 interrupt-parent = <&gic>;
20 #address-cells = <2>;
21 #size-cells = <2>;
28 stdout-path = "serial0:115200n8";
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/linux/arch/arm/boot/dts/qcom/
H A Dqcom-msm8916-smp.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
6 enable-method = "qcom,msm8916-smp";
9 enable-method = "qcom,msm8916-smp";
12 enable-method = "qcom,msm8916-smp";
15 enable-method = "qcom,msm8916-smp";
18 idle-states {
19 /delete-property/ entry-method;
29 compatible = "qcom,idle-state-spc", "arm,idle-state";
/linux/Documentation/ABI/testing/
H A Dsysfs-driver-toshiba_acpi8 * 0x1 -> FN-Z
9 * 0x2 -> AUTO (also called TIMER)
10 * 0x8 -> ON
11 * 0x10 -> OFF
14 parameters, kernel 3.15 only accepts the first two (FN-Z and
26 valid values range from 0-60.
29 type and the range accepted for type 2 is 1-60.
30 See the entry named "kbd_type"
37 Description: This file shows the absolute position of the built-in
47 * 0 -> OFF
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/linux/drivers/infiniband/core/
H A Dmad.c2 * Copyright (c) 2004-2007 Voltaire, Inc. All rights reserved.
18 * - Redistributions of source code must retain the above
22 * - Redistributions in binary form must reproduce the above
40 #include <linux/dma-mapping.h>
60 struct trace_event_raw_ib_mad_send_template *entry) in create_mad_addr_info() argument
62 struct ib_ud_wr *wr = &mad_send_wr->send_wr; in create_mad_addr_info()
65 rdma_query_ah(wr->ah, &attr); in create_mad_addr_info()
68 entry->sl = attr.sl; in create_mad_addr_info()
69 entry->rqpn = wr->remote_qpn; in create_mad_addr_info()
70 entry->rqkey = wr->remote_qkey; in create_mad_addr_info()
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/linux/drivers/md/dm-vdo/
H A Dwait-queue.c1 // SPDX-License-Identifier: GPL-2.0-only
6 #include "wait-queue.h"
8 #include <linux/device-mapper.h>
12 #include "status-codes.h"
15 * vdo_waitq_enqueue_waiter() - Add a waiter to the tail end of a waitq.
23 BUG_ON(waiter->next_waiter != NULL); in vdo_waitq_enqueue_waiter()
25 if (waitq->last_waiter == NULL) { in vdo_waitq_enqueue_waiter()
27 * The waitq is empty, so form the initial circular list by self-linking the in vdo_waitq_enqueue_waiter()
30 waiter->next_waiter = waiter; in vdo_waitq_enqueue_waiter()
33 waiter->next_waiter = waitq->last_waiter->next_waiter; in vdo_waitq_enqueue_waiter()
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/linux/arch/arm64/boot/dts/qcom/
H A Dsm4450.dtsi1 // SPDX-License-Identifier: BSD-3-Clause
6 #include <dt-bindings/clock/qcom,rpmh.h>
7 #include <dt-bindings/clock/qcom,sm4450-camcc.h>
8 #include <dt-bindings/clock/qcom,sm4450-dispcc.h>
9 #include <dt-bindings/clock/qcom,sm4450-gcc.h>
10 #include <dt-bindings/clock/qcom,sm4450-gpucc.h>
11 #include <dt-bindings/gpio/gpio.h>
12 #include <dt-bindings/interrupt-controller/arm-gic.h>
13 #include <dt-bindings/soc/qcom,rpmh-rsc.h>
16 interrupt-parent = <&intc>;
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/linux/arch/arm64/kernel/
H A Dcpu_ops.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * CPU kernel entry/exit control
46 if (!strcmp(name, (*ops)->name)) in cpu_get_ops()
68 enable_method = of_get_property(dn, "enable-method", NULL); in cpu_read_enable_method()
71 * The boot CPU may not have an enable method (e.g. in cpu_read_enable_method()
72 * when spin-table is used for secondaries). in cpu_read_enable_method()
76 pr_err("%pOF: missing enable-method property\n", in cpu_read_enable_method()
85 * checking the enable method since for some in cpu_read_enable_method()
90 pr_err("Unsupported ACPI enable-method\n"); in cpu_read_enable_method()
97 * Read a cpu's enable method and record it in cpu_ops.
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/linux/Documentation/filesystems/nfs/
H A Drpc-cache.rst21 - mapping from IP address to client name
22 - mapping from client name and filesystem to export options
23 - mapping from UID to list of GIDs, to work around NFS's limitation
25 - mappings between local UID/GID and remote UID/GID for sites that
27 - mapping from network identify to public key for crypto authentication.
31 - general cache lookup with correct locking
32 - supporting 'NEGATIVE' as well as positive entries
33 - allowing an EXPIRED time on cache items, and removing
34 items after they expire, and are no longer in-use.
35 - making requests to user-space to fill in cache entries
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/linux/drivers/scsi/aic94xx/
H A Daic94xx_sds.c1 // SPDX-License-Identifier: GPL-2.0-only
18 /* ---------- OCM stuff ---------- */
34 struct asd_ocm_dir_ent entry[15]; member
65 .type = (OCM_DE_ADDC2C_RES0), /* Entry type */
70 .type = (OCM_DE_ADDC2C_RES1), /* Entry type */
75 .type = (OCM_DE_ADDC2C_RES2), /* Entry type */
80 .type = (OCM_DE_ADDC2C_RES3), /* Entry type */
85 .type = (OCM_DE_WIN_DRVR), /* Entry type */
108 * asd_read_ocm_seg - read an on chip memory (OCM) segment
120 if (unlikely(asd_ha->iospace)) in asd_read_ocm_seg()
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