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/openbmc/qemu/docs/
H A Dpcie_pci_bridge.txt6 PCIE-to-PCI bridge is a new method for legacy PCI
9 Previously Intel DMI-to-PCI bridge was used for this purpose.
10 But due to its strict limitations - no support of hot-plug,
11 no cross-platform and cross-architecture support - a new generic
12 PCIE-to-PCI bridge should now be used for any legacy PCI device usage
15 This generic PCIE-PCI bridge is a cross-platform device,
16 can be hot-plugged into appropriate root port (requires additional actions,
17 see 'PCIE-PCI bridge hot-plug' section),
18 and supports devices hot-plug into the bridge itself
21 Hot-plug of legacy PCI devices into the bridge
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H A Dpcie.txt25 QEMU does not have a clear socket-device matching mechanism
43 Note: Integrated Endpoints are not hot-pluggable.
51 (2) PCI Express Root Ports (pcie-root-port), for starting exclusively
54 (3) PCI Express to PCI Bridge (pcie-pci-bridge), for starting legacy PCI
57 (4) Extra Root Complexes (pxb-pcie), if multiple PCI Express Root Buses
61 ----------------------------------------------------------------------------
63 ----------- ------------------ ------------------- --------------
64 | PCI Dev | | PCIe Root Port | | PCIe-PCI Bridge | | pxb-pcie |
65 ----------- ------------------ ------------------- --------------
67 2.1.1 To plug a device into pcie.0 as a Root Complex Integrated Endpoint use:
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/openbmc/openbmc/meta-facebook/meta-yosemite4/recipes-phosphor/gpio/phosphor-gpio-monitor/
H A Dyosemite4-phosphor-multi-gpio-monitor.json7 "RISING": ["set-button-sled.service"]
16 "RISING": ["probe-slot-device@1.service", "en-i3c-hub-scan-fru@1.service", "rescan-wf-bi
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H A Dslot-hot-plug@.service2 Description=slot hot-plug:%i
6 ExecStartPre=/usr/libexec/phosphor-state-manager/wait-until-mctp-connection-done %i
7 ExecStart=/bin/systemctl restart phosphor-discover-system-state@%i.service
/openbmc/linux/drivers/platform/surface/
H A Dsurface_hotplug.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Surface Book (2 and later) hot-plug driver.
5 * Surface Book devices (can) have a hot-pluggable discrete GPU (dGPU). This
6 * driver is responsible for out-of-band hot-plug event signaling on these
7 * devices. It is specifically required when the hot-plug device is in D3cold
8 * and can thus not generate PCIe hot-plug events itself.
11 * device-check notifications to be picked up by the PCIe hot-plug driver.
13 * Copyright (C) 2019-2022 Maximilian Luz <luzmaximilian@gmail.com>
32 { "base_presence-int-gpio", &shps_base_presence_int, 1 },
33 { "base_presence-gpio", &shps_base_presence, 1 },
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H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
3 # Microsoft Surface Platform-Specific Drivers
7 bool "Microsoft Surface Platform-Specific Device Drivers"
11 Say Y here to get to see options for platform-specific device drivers
29 be called surface3-wmi.
47 on 5th- and 6th-generation Microsoft Surface devices (including
55 thermal sensor access, and real-time clock information, depending on
59 tristate "Surface System Aggregator Module User-Space Interface"
62 Provides a misc-device interface to the Surface System Aggregator
67 the SSAM controller. Said client device manages a misc-device
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/openbmc/linux/drivers/staging/sm750fb/
H A Dddk750_sii164.h1 /* SPDX-License-Identifier: GPL-2.0 */
7 /* Hot Plug detection mode structure */
9 SII164_HOTPLUG_DISABLE = 0, /* Disable Hot Plug output bit
15 SII164_HOTPLUG_USE_HTPLG /* Use Hot Plug detect bit. */
110 /* Hot Plug detect Input (HTPLG) */
139 /* De-skewing Enable bit (DKEN) */
143 /* De-skewing Setting (DK[3:1])*/
H A Dddk750_sii164.c1 // SPDX-License-Identifier: GPL-2.0
79 * edge_select - Edge Select:
84 * bus_select - Input Bus Select:
85 * 0 = Input data bus is 12-bits wide
86 * 1 = Input data bus is 24-bits wide
87 * dual_edge_clk_select - Dual Edge Clock Select
90 * hsync_enable - Horizontal Sync Enable:
93 * vsync_enable - Vertical Sync Enable:
96 * deskew_enable - De-skewing Enable:
97 * 0 = De-skew disabled
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/openbmc/openbmc/meta-facebook/meta-yosemite4/recipes-phosphor/gpio/
H A Dphosphor-gpio-monitor_%.bbappend3 inherit obmc-phosphor-systemd systemd
5 SRC_URI += "file://yosemite4-phosphor-multi-gpio-monitor.json \
6 file://configure-nic-mctp-endpoint \
7 file://setup-nic-endpoint-slot@.service \
8 file://remove-nic-endpoint-slot@.service \
9 file://set-button-sled.service \
10 file://probe-slot-device@.service \
11 file://probe-slot-device \
12 file://reconfig-net-interface@.service \
13 file://reconfig-net-interface \
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/openbmc/linux/Documentation/admin-guide/mm/
H A Dmemory-hotplug.rst2 Memory Hot(Un)Plug
5 This document describes generic Linux support for memory hot(un)plug with
13 Memory hot(un)plug allows for increasing and decreasing the size of physical
18 Memory hot(un)plug is used for various purposes:
20 - The physical memory available to a machine can be adjusted at runtime, up- or
25 - Replacing hardware, such as DIMMs or whole NUMA nodes, without downtime. One
28 - Reducing energy consumption either by physically unplugging memory modules or
31 Further, the basic memory hot(un)plug infrastructure in Linux is nowadays also
32 used to expose persistent memory, other performance-differentiated memory and
35 Linux only supports memory hot(un)plug on selected 64 bit architectures, such as
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/openbmc/openbmc/meta-ampere/meta-jade/recipes-phosphor/gpio/phosphor-gpio-monitor/
H A Dampere_psu_reset_hotswap.sh5 # At this time, to plug-in PSU2 in system, PSU2 won't deliver power to
11 # BMC SW work-around solution:
12 # - When BMC detect event PSU is plugged in system, BMC will reset HSC
13 # by disabling HOT SWAP and then enabling HOT SWAP through pmbus command
17 # In case hot swap occurs during BMC reset, BMC still not in operation state,
18 # BMC can't detect PSU plug/unplug, then the work-around won't be executed
45 chassisstate=$(obmcutil chassisstate | awk -F. '{print $NF}')
52 if ! data=$(i2cget -f -y $HSC_PMBUS_NUM $HSC_SLAVE_ADDR $STATUS_MFR_SPECIFIC); then
53 echo "ERROR: Can't access the i2c. Please check /dev/i2c-$HSC_PMBUS_NUM"
61 echo "Reset Hot swap output on PSU $PSU"
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/openbmc/qemu/docs/specs/
H A Dppc-spapr-hotplug.rst6 to handle hot plugging of dynamic "physical" resources like PCI cards, or
7 "logical"/para-virtual resources like memory, CPUs, and "physical"
8 host-bridges, which are generally managed by the host/hypervisor and provided
14 Dynamic-reconfiguration Connectors
17 To manage hot plug/unplug of these resources, a firmware abstraction known as
26 the name/index/power-domain/type of each DRC allocated to a guest at
31 such as the DRCs managing PCI slots on a hot plugged PHB. In this case the
33 for hot plugged resources described under :ref:`guest-host-interface`.
37 of ``ibm,drc-indexes``:
39 ``ibm,drc-names``
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H A Dacpi_mem_hotplug.rst1 QEMU<->ACPI BIOS memory hotplug interface
4 ACPI BIOS GPE.3 handler is dedicated for notifying OS about memory hot-add
5 and hot-remove events.
7 Memory hot-plug interface (IO port 0xa00-0xa17, 1-4 byte access)
8 ----------------------------------------------------------------
13 [0x0-0x3]
15 [0x4-0x7]
17 [0x8-0xb]
19 [0xc-0xf]
21 [0x10-0x13]
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/openbmc/qemu/hw/pci/
H A Dpcie.c41 PCIE_DPRINTF("%s:%x "fmt, (dev)->name, (dev)->devfn, ## __VA_ARGS__)
73 uint8_t *exp_cap = dev->config + dev->exp.exp_cap; in pcie_cap_v1_fill()
74 uint8_t *cmask = dev->cmask + dev->exp.exp_cap; in pcie_cap_v1_fill()
83 * table 7-12: in pcie_cap_v1_fill()
91 if (dev->cap_present & QEMU_PCIE_EXT_TAG) { in pcie_cap_v1_fill()
166 uint8_t *exp_cap = dev->config + dev->exp.exp_cap; in pcie_cap_fill_link_ep_usp()
184 uint8_t *exp_cap = dev->config + dev->exp.exp_cap; in pcie_cap_fill_slot_lnk()
196 if (s->width > QEMU_PCI_EXP_LNK_X1 || in pcie_cap_fill_slot_lnk()
197 s->speed > QEMU_PCI_EXP_LNK_2_5GT) { in pcie_cap_fill_slot_lnk()
202 if (s->speed > QEMU_PCI_EXP_LNK_2_5GT) { in pcie_cap_fill_slot_lnk()
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/openbmc/linux/drivers/gpu/drm/
H A Ddrm_bridge.c17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
25 #include <linux/media-bus-format.h>
50 * [ CRTC ---> ] Encoder ---> Bridge A ---> Bridge B
88 * drm_atomic_helper_commit_modeset_disables() (either directly in hand-rolled
89 * commit check and commit tail handlers, or through the higher-level
98 * connector-related operations exposed by the bridge (see the overview
110 * - The upstream driver doesn't use the component framework and isn't a
111 * MIPI-DSI host. In this case, the bridge driver will probe at some
115 * - The upstream driver doesn't use the component framework, but is a
116 * MIPI-DSI host. The bridge device uses the MIPI-DCS commands to be
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/openbmc/linux/Documentation/driver-api/
H A Dvfio-mediated-device.rst1 .. SPDX-License-Identifier: GPL-2.0-only
17 The number of use cases for virtualizing DMA devices that do not have built-in
25 an IOMMU/device-agnostic framework for exposing direct device access to user
26 space in a secure, IOMMU-protected environment. This framework is used for
44 The following high-level block diagram shows the main components and interfaces
48 +---------------+
50 | +-----------+ | mdev_register_driver() +--------------+
51 | | | +<------------------------+ |
53 | | bus | +------------------------>+ vfio_mdev.ko |<-> VFIO user
55 | | | | +--------------+
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/openbmc/linux/include/drm/
H A Ddrm_bridge.h45 * enum drm_bridge_attach_flags - Flags for &drm_bridge_funcs.attach
56 * struct drm_bridge_funcs - drm_bridge control functions
107 * to look at anything else but the passed-in mode, and validate it
108 * against configuration-invariant hardward constraints. Any further
366 * non-NULL).
525 * DRM_BRIDGE_OP_DETECT flag in their &drm_bridge->ops.
539 * The @get_modes callback is mostly intended to support non-probeable
542 * &drm_bridge_funcs->get_edid callback instead.
545 * DRM_BRIDGE_OP_MODES flag in their &drm_bridge->ops.
573 * DRM_BRIDGE_OP_EDID flag in their &drm_bridge->ops.
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/openbmc/linux/drivers/pci/hotplug/
H A Dshpchp_sysfs.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Compaq Hot Plug Controller Driver
6 * Copyright (c) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
22 /* A few routines that create sysfs entries for the hot plug controller */
33 bus = pdev->subordinate; in show_ctrl()
37 if (res && (res->flags & IORESOURCE_MEM) && in show_ctrl()
38 !(res->flags & IORESOURCE_PREFETCH)) { in show_ctrl()
41 (unsigned long long)res->start, in show_ctrl()
47 if (res && (res->flags & IORESOURCE_MEM) && in show_ctrl()
48 (res->flags & IORESOURCE_PREFETCH)) { in show_ctrl()
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/openbmc/linux/drivers/gpu/drm/amd/include/ivsrcid/dcn/
H A Dirqsrcs_dcn_1_0.h156 #define DCN_1_0__SRCID__DC_HPD1_INT 9 // Hot Plug Detection 1 DC_HPD1_INTERRUPT DIS…
159 #define DCN_1_0__SRCID__DC_HPD2_INT 9 // Hot Plug Detection 2 DC_HPD2_INTERRUPT DIS…
162 #define DCN_1_0__SRCID__DC_HPD3_INT 9 // Hot Plug Detection 3 DC_HPD3_INTERRUPT DIS…
165 #define DCN_1_0__SRCID__DC_HPD4_INT 9 // Hot Plug Detection 4 DC_HPD4_INTERRUPT DIS…
168 #define DCN_1_0__SRCID__DC_HPD5_INT 9 // Hot Plug Detection 5 DC_HPD5_INTERRUPT DIS…
171 #define DCN_1_0__SRCID__DC_HPD6_INT 9 // Hot Plug Detection 6 DC_HPD6_INTERRUPT DIS…
174 #define DCN_1_0__SRCID__DC_HPD1_RX_INT 9 // Hot Plug Detection RX interrupt 1 DC_HPD1_R…
177 #define DCN_1_0__SRCID__DC_HPD2_RX_INT 9 // Hot Plug Detection RX interrupt 2 DC_HPD2_R…
180 #define DCN_1_0__SRCID__DC_HPD3_RX_INT 9 // Hot Plug Detection RX interrupt 3 DC_HPD3_R…
183 #define DCN_1_0__SRCID__DC_HPD4_RX_INT 9 // Hot Plug Detection RX interrupt 4 DC_HPD4_R…
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/openbmc/linux/drivers/iommu/intel/
H A Dcap_audit.c1 // SPDX-License-Identifier: GPL-2.0
3 * cap_audit.c - audit iommu capabilities for boot time and hot plug
119 /* Abort hot plug if the hot plug iommu feature is smaller than global */ in cap_audit_hotplug()
135 return -EFAULT; in cap_audit_hotplug()
153 intel_iommu_ecap_sanity = i->ecap; in cap_audit_static()
154 intel_iommu_cap_sanity = i->cap; in cap_audit_static()
171 rc = -EOPNOTSUPP; in cap_audit_static()
191 return -EFAULT; in intel_cap_audit()
/openbmc/entity-manager/
H A DREADME.md14 likely does contain multiple sub-components, but the component itself as a whole
31 of a D-Bus interface definition.
48 components at runtime. The most common of these, fru-device, is included in
49 the Entity-Manager repo, and scans all available I2C buses for IPMI FRU
51 **[peci-pcie](https://github.com/openbmc/peci-pcie):** A daemon that utilizes
53 **[smbios-mdr](https://github.com/openbmc/smbios-mdr):** A daemon that
73 records to D-Bus.
77 describe. One example of this is dbus-sensors, which contains a suite of
81 daemons and Hot swap backplane management daemons, or drive daemons.
84 reactor when architectures are multi-tiered. An example of this might include a
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/openbmc/linux/Documentation/PCI/
H A Dacpi-info.rst1 .. SPDX-License-Identifier: GPL-2.0
39 If the OS is expected to manage a non-discoverable device described via
50 These are all device-specific, non-architected things, so the only way a
52 the device-specific details. The host bridge registers also include ECAM
66 bridge registers (including ECAM space) in PNP0C02 catch-all devices [6].
67 With the exception of ECAM, the bridge register space is device-specific
78 PNP0C02 "motherboard" devices are basically a catch-all. There's no
89 the address space is device-specific. An ACPI OS learns the base address
92 The MCFG table must describe the ECAM space of non-hot pluggable host
95 hot-pluggable host bridge [9]. Note that for both MCFG and _CBA, the base
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/openbmc/linux/arch/x86/kernel/
H A Ditmt.c1 // SPDX-License-Identifier: GPL-2.0-only
51 return -EINVAL; in sched_itmt_update_handler()
83 * sched_set_itmt_support() - Indicate platform supports ITMT
93 * It must not be called with cpu hot plug lock
111 return -ENOMEM; in sched_set_itmt_support()
127 * sched_clear_itmt_support() - Revoke platform's support of ITMT
132 * It must not be called with cpu hot plug lock
167 * sched_set_itmt_core_prio() - Set CPU priority based on ITMT
/openbmc/linux/arch/ia64/include/asm/
H A Dnodedata.h9 * Copyright (c) 2002 Kimio Suganuma <k-suganuma@da.jp.nec.com>
36 #define local_node_data (local_cpu_data->node_data)
41 * NODE_DATA - should be used in all code not related to system
47 #define NODE_DATA(nid) (local_node_data->pg_data_ptrs[nid])
50 * LOCAL_DATA_ADDR - This is to calculate the address of other node's
51 * "local_node_data" at hot-plug phase. The local_node_data
53 * just executing cpu. However, when new node is hot-added,
/openbmc/linux/Documentation/devicetree/bindings/media/i2c/
H A Dadv7604.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Hans Verkuil <hverkuil-cisco@xs4all.nl>
23 - enum:
24 - adi,adv7610
25 - adi,adv7611
26 - adi,adv7612
32 reg-names:
35 - const: main
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