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/linux/Documentation/power/
H A Dsuspend-and-cpuhotplug.rst2 Interaction of Suspend code (S3) with the CPU hotplug infrastructure
8 I. Differences between CPU hotplug and Suspend-to-RAM
11 How does the regular CPU hotplug code differ from how the Suspend-to-RAM
17 interactions involving the freezer and CPU hotplug and also tries to explain
21 What happens when regular CPU hotplug and Suspend-to-RAM race with each other
79 Disable regular cpu hotplug
99 | Decrease cpu_hotplug_disabled, thereby enabling regular cpu hotplug
117 Regular CPU hotplug call path
149 regular CPU hotplug]
154 regular CPU hotplug and the suspend code path converge at the _cpu_down() and
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/linux/drivers/pci/hotplug/
H A Dpci_hotplug_core.c3 * PCI HotPlug Controller Core
60 retval = get_power_status(pci_slot->hotplug, &value); in GET_STATUS()
70 struct hotplug_slot *slot = pci_slot->hotplug; in power_write_file()
111 retval = get_attention_status(pci_slot->hotplug, &value); in attention_read_file()
121 struct hotplug_slot *slot = pci_slot->hotplug; in attention_write_file()
150 retval = get_latch_status(pci_slot->hotplug, &value); in latch_read_file()
167 retval = get_adapter_status(pci_slot->hotplug, &value); in presence_read_file()
182 struct hotplug_slot *slot = pci_slot->hotplug; in test_write_file()
247 /* Create symbolic link to the hotplug driver module */ in fs_add_slot()
337 * __pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem
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H A Drpadlpar_core.c103 * find_php_slot - return hotplug slot structure for device node
106 * This routine will return the hotplug slot structure
196 /* Add hotplug slot */ in dlpar_add_pci_slot()
198 printk(KERN_ERR "%s: unable to add hotplug slot %s\n", in dlpar_add_pci_slot()
214 /* If pci slot is hotpluggable, use hotplug to remove it */ in dlpar_remove_phb()
217 printk(KERN_ERR "%s: unable to remove hotplug slot %s\n", in dlpar_remove_phb()
247 printk(KERN_ERR "%s: unable to add hotplug slot %s\n", in dlpar_add_phb()
277 * Make the hotplug module and the kernel aware of a newly added I/O Slot.
325 * Remove the kernel and hotplug representations of an I/O Slot.
350 * Remove the kernel and hotplug representations of a PCI I/O Slot.
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H A Dpciehp_pci.c25 * pciehp_configure_device() - enumerate PCI devices below a hotplug bridge
26 * @ctrl: PCIe hotplug controller
28 * Enumerate PCI devices below a hotplug bridge and add them to the system.
45 * boot firmware or a previous hotplug event. in pciehp_configure_device()
85 * pciehp_unconfigure_device() - remove PCI devices below a hotplug bridge
86 * @ctrl: PCIe hotplug controller
91 * Unbind PCI devices below a hotplug bridge from their drivers and remove
H A Dcpcihp_generic.c11 * This generic CompactPCI hotplug driver should allow using the PCI hotplug
76 err("Invalid hotplug bus bridge device bus number"); in validate_parameters()
82 err("Invalid hotplug bus bridge device"); in validate_parameters()
88 err("Invalid hotplug bus bridge device slot number"); in validate_parameters()
154 err("Could not register cPCI hotplug controller"); in cpcihp_generic_init()
161 err("Could not register cPCI hotplug bus"); in cpcihp_generic_init()
168 err("Could not started cPCI hotplug system"); in cpcihp_generic_init()
H A Dacpiphp_glue.c3 * ACPI PCI HotPlug glue functions to ACPI CA subsystem
54 * acpiphp_init_context - Create hotplug context and grab a reference to it.
75 * acpiphp_get_context - Get hotplug context and grab a reference to it.
93 * acpiphp_put_context - Drop a reference to ACPI hotplug context.
94 * @context: ACPI hotplug context to drop a reference to.
168 /* Root bridges will not have hotplug context. */ in free_bridge()
259 acpi_handle_err(handle, "No hotplug context\n"); in acpiphp_add_context()
299 * by the native PCIe hotplug (PCIeHP) or standard PCI hotplug in acpiphp_add_context()
313 pr_debug("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n", in acpiphp_add_context()
321 pr_warn("Slot %llu already registered by another hotplug driver\n", sun); in acpiphp_add_context()
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H A Dacpi_pcihp.c34 /* acpi_run_oshp - get control of hotplug from the firmware
36 * @handle - the handle of the hotplug controller.
64 * @pdev: the pci_dev of the bridge that has a hotplug controller
66 * Attempt to take hotplug control from firmware.
108 * This hotplug controller was not listed in the ACPI name in acpi_get_hp_hw_control_from_firmware()
121 pci_info(pdev, "Requesting control of SHPC hotplug via OSHP (%s)\n", in acpi_get_hp_hw_control_from_firmware()
134 pci_info(pdev, "Cannot get control of SHPC hotplug\n"); in acpi_get_hp_hw_control_from_firmware()
138 pci_info(pdev, "Gained control of SHPC hotplug (%s)\n", in acpi_get_hp_hw_control_from_firmware()
H A Dpciehp.h47 * struct controller - PCIe hotplug controller
49 * @dsn: cached copy of Device Serial Number of Function 0 in the hotplug slot
77 * @hotplug_slot: structure registered with the PCI hotplug core
81 * @depth: Number of additional hotplug ports in the path to the root bus,
88 * PCIe hotplug has a 1:1 relationship between controller and slot, hence
113 struct hotplug_slot hotplug_slot; /* hotplug core interface */
149 * hotplug port was inaccessible when the interrupt occurred, requiring
151 * hotplug port accessible by runtime resuming its parents to D0
/linux/Documentation/core-api/
H A Dcpu_hotplug.rst2 CPU hotplug in the Kernel
19 insertion and removal require support for CPU hotplug.
23 system execution path. Hence the need for CPU hotplug support in the
26 A more novel use of CPU-hotplug support is its use today in suspend resume
73 of them may be online. When physical hotplug is processed by the relevant
77 at which time hotplug is disabled.
87 Using CPU hotplug
104 drwxr-xr-x 2 root root 0 Dec 21 16:33 hotplug
125 and excluded from CPU hotplug.
127 The CPU hotplug coordination
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/linux/tools/testing/selftests/sched_ext/
H A Dhotplug.c14 #include "hotplug.bpf.skel.h"
46 struct hotplug *skel; in test_hotplug()
102 struct hotplug *skel; in test_hotplug_attach()
110 skel = SCX_OPS_OPEN(hotplug_nocb_ops, hotplug); in test_hotplug_attach()
113 SCX_OPS_LOAD(skel, hotplug_nocb_ops, hotplug, uei); in test_hotplug_attach()
116 * Take the CPU offline to increment the global hotplug seq, which in test_hotplug_attach()
117 * should cause attach to fail due to us setting the hotplug seq above in test_hotplug_attach()
164 .name = "hotplug",
165 .description = "Verify hotplug behavior",
/linux/Documentation/arch/arm64/
H A Dcpu-hotplug.rst5 CPU Hotplug and ACPI
8 CPU hotplug in the arm64 world is commonly used to describe the kernel taking
15 CPU Hotplug on physical systems - CPUs not present at boot
42 CPU Hotplug on virtual systems - CPUs not enabled at boot
49 CPU Hotplug on virtual systems is supported. It is distinct from physical
50 CPU Hotplug as all resources are described as ``present``, but CPUs may be
58 Virtual hotplug is implemented as a firmware policy affecting which CPUs can be
/linux/include/linux/platform_data/
H A Dmlxreg.h28 * enum mlxreg_hotplug_kind - kind of hotplug entry
57 * enum mlxreg_hotplug_device_action - hotplug device action required for
73 * struct mlxreg_core_hotplug_notifier - hotplug notifier block:
98 * Structure represents I2C hotplug device static data (board topology) and
127 * @hpdev - hotplug device data;
160 * @kind: kind of hotplug attribute;
207 * struct mlxreg_core_hotplug_platform_data - hotplug platform data:
209 * @items: same type components with the hotplug capability;
212 * @count: number of the components with the hotplug capability;
/linux/Documentation/driver-api/usb/
H A Dhotplug.rst38 Kernel Hotplug Helper (``/sbin/hotplug``)
41 There is a kernel parameter: ``/proc/sys/kernel/hotplug``, which normally
42 holds the pathname ``/sbin/hotplug``. That parameter names a program
45 The /sbin/hotplug program can be invoked by any subsystem as part of its
52 Hotplug software and other resources is available at:
54 http://linux-hotplug.sourceforge.net
62 The USB subsystem currently invokes ``/sbin/hotplug`` when USB devices
/linux/drivers/platform/mellanox/
H A Dmlxreg-dpu.c71 /* Hotplug aggregation masks. */
198 /* Default hotplug data. */
324 * @hotplug_data: hotplug platform data
325 * @hotplug: hotplug device
333 struct platform_device *hotplug; member
464 /* Copy platform specific hotplug data. */ in mlxreg_dpu_config_init()
493 /* Register hotplug driver. */ in mlxreg_dpu_config_init()
497 mlxreg_dpu->hotplug = in mlxreg_dpu_config_init()
498 platform_device_register_resndata(dev, "mlxreg-hotplug", in mlxreg_dpu_config_init()
502 if (IS_ERR(mlxreg_dpu->hotplug)) { in mlxreg_dpu_config_init()
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/linux/Documentation/admin-guide/media/
H A Dttusb-dec.rst18 - Hotplug firmware loader
38 Hotplug Firmware Loading
44 Copy the three files downloaded above into the /usr/lib/hotplug/firmware or
45 /lib/firmware directory (depending on configuration of firmware hotplug).
/linux/Documentation/fault-injection/
H A Dnotifier-error-inject.rst10 * Memory hotplug notifier
33 Memory hotplug notifier error injection module
44 Example: Inject memory hotplug offline error (-12 == -ENOMEM)::
94 * tools/testing/selftests/cpu-hotplug/cpu-on-off-test.sh
95 * tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
/linux/drivers/staging/media/av7110/
H A DKconfig30 download/extract it, and then copy it to /usr/lib/hotplug/firmware
31 or /lib/firmware (depending on configuration of firmware hotplug).
69 download/extract it, and then copy it to /usr/lib/hotplug/firmware
70 or /lib/firmware (depending on configuration of firmware hotplug).
/linux/Documentation/ABI/testing/
H A Dsysfs-firmware-acpi67 What: /sys/firmware/acpi/hotplug/
71 There are separate hotplug profiles for different classes of
73 processors, PCI root bridges etc. A hotplug profile for a given
75 that class of devices will be handled by the ACPI core hotplug
77 of /sys/firmware/acpi/hotplug/.
80 hotplug profile:
84 hotplug events associated with the given class of
87 effectively disables hotplug for the corresponding
/linux/arch/powerpc/platforms/pseries/
H A Dpmem.c13 #include <linux/sched/hotplug.h>
110 /* slim chance, but we might get a hotplug event while booting */ in dlpar_hp_pmem()
114 pr_err("Hotplug event for a pmem device, but none exists\n"); in dlpar_hp_pmem()
119 pr_err("Unsupported hotplug event type %d\n", in dlpar_hp_pmem()
133 pr_err("Unsupported hotplug action (%d)\n", hp_elog->action); in dlpar_hp_pmem()
/linux/drivers/net/wireless/intel/iwlegacy/
H A DKconfig28 look in the hotplug script /etc/hotplug/firmware.agent to
55 look in the hotplug script /etc/hotplug/firmware.agent to
/linux/arch/arm/mach-mvebu/
H A Dplatsmp-a9.c46 * in the offline state after using CPU hotplug. in mvebu_cortex_a9_boot_secondary()
59 * When a CPU is brought back online, either through CPU hotplug, or
75 * CPU hotplug is implemented by putting offline CPUs into the in armada_38x_cpu_die()
83 * we support CPU hotplug. However, the function does not need to do
/linux/tools/testing/selftests/ftrace/test.d/ftrace/
H A Dfunc_hotplug.tc3 # description: ftrace - function trace across cpu hotplug
15 echo "We cannot test cpu hotplug in UP environment"
28 echo "We cannot test cpu hotplug with a single cpu online"
/linux/kernel/
H A Dsmpboot.c25 * For the hotplug case we keep the task structs around and reuse
97 * smpboot_thread_fn - percpu hotplug thread loop function
283 * to hotplug
284 * @plug_thread: Hotplug thread descriptor
312 * smpboot_unregister_percpu_thread - Unregister a per_cpu thread related to hotplug
313 * @plug_thread: Hotplug thread descriptor
/linux/tools/testing/selftests/
H A DMakefile15 TARGETS += cpu-hotplug
60 TARGETS += memory-hotplug
133 TARGETS_HOTPLUG = cpu-hotplug
134 TARGETS_HOTPLUG += memory-hotplug
226 hotplug: target
232 run_hotplug: hotplug
313 .PHONY: all run_tests hotplug run_hotplug clean_hotplug run_pstore_crash install clean gen_tar
/linux/arch/powerpc/kernel/
H A Deeh_driver.c682 * hotplug shutdown scripts, e.g. ifdown for ethernet. Yes, in eeh_reset_device()
688 pr_info("EEH: Sleep 5s ahead of %s hotplug\n", in eeh_reset_device()
757 * This shouldn't happen often, but you might see it if you hotplug a PCIe
774 if (!slot || !slot->hotplug) in eeh_slot_presence_check()
777 ops = slot->hotplug->ops; in eeh_slot_presence_check()
783 ops->set_attention_status(slot->hotplug, 1); in eeh_slot_presence_check()
785 rc = ops->get_adapter_status(slot->hotplug, &state); in eeh_slot_presence_check()
804 if (!slot || !slot->hotplug) in eeh_clear_slot_attention()
807 ops = slot->hotplug->ops; in eeh_clear_slot_attention()
811 ops->set_attention_status(slot->hotplug, 0); in eeh_clear_slot_attention()
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