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10623 commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Bjorn Helgaas
|
302b84e84d |
Revert "PCI: Mark LSI FW643 to avoid bus reset"
This reverts commit |
||
|
Linus Torvalds
|
705c1da8fa |
pci-v6.9-changes
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Merge tag 'pci-v6.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull PCI updates from Bjorn Helgaas:
"Enumeration:
- Consolidate interrupt related code in irq.c (Ilpo Järvinen)
- Reduce kernel size by replacing sysfs resource macros with
functions (Ilpo Järvinen)
- Reduce kernel size by compiling sysfs support only when
CONFIG_SYSFS=y (Lukas Wunner)
- Avoid using Extended Tags on 3ware-9650SE Root Port to work around
an apparent hardware defect (Jörg Wedekind)
Resource management:
- Fix an MMIO mapping leak in pci_iounmap() (Philipp Stanner)
- Move pci_iomap.c and other PCI-specific devres code to drivers/pci
(Philipp Stanner)
- Consolidate PCI devres code in devres.c (Philipp Stanner)
Power management:
- Avoid D3cold on Asus B1400 PCI-NVMe bridge, where firmware doesn't
know how to return correctly to D0, and remove previous quirk that
wasn't as specific (Daniel Drake)
- Allow runtime PM when the driver enables it but doesn't need any
runtime PM callbacks (Raag Jadav)
- Drain runtime-idle callbacks before driver removal to avoid races
between .remove() and .runtime_idle(), which caused intermittent
page faults when the rtsx .runtime_idle() accessed registers that
its .remove() had already unmapped (Rafael J. Wysocki)
Virtualization:
- Avoid Secondary Bus Reset on LSI FW643 so it can be assigned to VMs
with VFIO, e.g., for professional audio software on many Apple
machines, at the cost of leaking state between VMs (Edmund Raile)
Error handling:
- Print all logged TLP Prefixes, not just the first, after AER or DPC
errors (Ilpo Järvinen)
- Quirk the DPC PIO log size for Intel Raptor Lake Root Ports, which
still don't advertise a legal size (Paul Menzel)
- Ignore expected DPC Surprise Down errors on hot removal (Smita
Koralahalli)
- Block runtime suspend while handling AER errors to avoid races that
prevent the device form being resumed from D3hot (Stanislaw
Gruszka)
Peer-to-peer DMA:
- Use atomic XA allocation in RCU read section (Christophe JAILLET)
ASPM:
- Collect bits of ASPM-related code that we need even without
CONFIG_PCIEASPM into aspm.c (David E. Box)
- Save/restore L1 PM Substates config for suspend/resume (David E.
Box)
- Update save_save when ASPM config is changed, so a .slot_reset()
during error recovery restores the changed config, not the
.probe()-time config (Vidya Sagar)
Endpoint framework:
- Refactor and improve pci_epf_alloc_space() API (Niklas Cassel)
- Clean up endpoint BAR descriptions (Niklas Cassel)
- Fix ntb_register_device() name leak in error path (Yang Yingliang)
- Return actual error code for pci_vntb_probe() failure (Yang
Yingliang)
Broadcom STB PCIe controller driver:
- Fix MDIO write polling, which previously never waited for
completion (Jonathan Bell)
Cadence PCIe endpoint driver:
- Clear the ARI "Next Function Number" of last function (Jasko-EXT
Wojciech)
Freescale i.MX6 PCIe controller driver:
- Simplify by replacing switch statements with function pointers for
different hardware variants (Frank Li)
- Simplify by using clk_bulk*() API (Frank Li)
- Remove redundant DT clock and reg/reg-name details (Frank Li)
- Add i.MX95 DT and driver support for both Root Complex and Endpoint
mode (Frank Li)
Microsoft Hyper-V host bridge driver:
- Reduce memory usage by limiting ring buffer size to 16KB instead of
4 pages (Michael Kelley)
Qualcomm PCIe controller driver:
- Add X1E80100 DT and driver support (Abel Vesa)
- Add DT 'required-opps' for SoCs that require a minimum performance
level (Johan Hovold)
- Make DT 'msi-map-mask' optional, depending on how MSI interrupts
are mapped (Johan Hovold)
- Disable ASPM L0s for sc8280xp, sa8540p and sa8295p because the PHY
configuration isn't tuned correctly for L0s (Johan Hovold)
- Split dt-binding qcom,pcie.yaml into qcom,pcie-common.yaml and
separate files for SA8775p, SC7280, SC8180X, SC8280XP, SM8150,
SM8250, SM8350, SM8450, SM8550 for easier reviewing (Krzysztof
Kozlowski)
- Enable BDF to SID translation by disabling bypass mode (Manivannan
Sadhasivam)
- Add endpoint MHI support for Snapdragon SA8775P SoC (Mrinmay
Sarkar)
Synopsys DesignWare PCIe controller driver:
- Allocate 64-bit MSI address if no 32-bit address is available (Ajay
Agarwal)
- Fix endpoint Resizable BAR to actually advertise the required 1MB
size (Niklas Cassel)
MicroSemi Switchtec management driver:
- Release resources if the .probe() fails (Christophe JAILLET)
Miscellaneous:
- Make pcie_port_bus_type const (Ricardo B. Marliere)"
* tag 'pci-v6.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (77 commits)
PCI/ASPM: Update save_state when configuration changes
PCI/ASPM: Disable L1 before configuring L1 Substates
PCI/ASPM: Call pci_save_ltr_state() from pci_save_pcie_state()
PCI/ASPM: Save L1 PM Substates Capability for suspend/resume
PCI: hv: Fix ring buffer size calculation
PCI: dwc: endpoint: Fix advertised resizable BAR size
PCI: cadence: Clear the ARI Capability Next Function Number of the last function
PCI: dwc: Strengthen the MSI address allocation logic
PCI: brcmstb: Fix broken brcm_pcie_mdio_write() polling
PCI: qcom: Add X1E80100 PCIe support
dt-bindings: PCI: qcom: Document the X1E80100 PCIe Controller
PCI: qcom: Enable BDF to SID translation properly
PCI/AER: Generalize TLP Header Log reading
PCI/AER: Use explicit register size for PCI_ERR_CAP
PCI: qcom: Disable ASPM L0s for sc8280xp, sa8540p and sa8295p
dt-bindings: PCI: qcom: Do not require 'msi-map-mask'
dt-bindings: PCI: qcom: Allow 'required-opps'
PCI/AER: Block runtime suspend when handling errors
PCI/ASPM: Move pci_save_ltr_state() to aspm.c
PCI/ASPM: Always build aspm.c
...
|
||
|
Linus Torvalds
|
07abb19a9b |
Power management updates for 6.9-rc1
- Allow the Energy Model to be updated dynamically (Lukasz Luba).
- Add support for LZ4 compression algorithm to the hibernation image
creation and loading code (Nikhil V).
- Fix and clean up system suspend statistics collection (Rafael
Wysocki).
- Simplify device suspend and resume handling in the power management
core code (Rafael Wysocki).
- Fix PCI hibernation support description (Yiwei Lin).
- Make hibernation take set_memory_ro() return values into account as
appropriate (Christophe Leroy).
- Set mem_sleep_current during kernel command line setup to avoid an
ordering issue with handling it (Maulik Shah).
- Fix wake IRQs handling when pm_runtime_force_suspend() is used as a
driver's system suspend callback (Qingliang Li).
- Simplify pm_runtime_get_if_active() usage and add a replacement for
pm_runtime_put_autosuspend() (Sakari Ailus).
- Add a tracepoint for runtime_status changes tracking (Vilas Bhat).
- Fix section title markdown in the runtime PM documentation (Yiwei
Lin).
- Enable preferred core support in the amd-pstate cpufreq driver (Meng
Li).
- Fix min_perf assignment in amd_pstate_adjust_perf() and make the
min/max limit perf values in amd-pstate always stay within the
(highest perf, lowest perf) range (Tor Vic, Meng Li).
- Allow intel_pstate to assign model-specific values to strings used in
the EPP sysfs interface and make it do so on Meteor Lake (Srinivas
Pandruvada).
- Drop long-unused cpudata::prev_cummulative_iowait from the
intel_pstate cpufreq driver (Jiri Slaby).
- Prevent scaling_cur_freq from exceeding scaling_max_freq when the
latter is an inefficient frequency (Shivnandan Kumar).
- Change default transition delay in cpufreq to 2ms (Qais Yousef).
- Remove references to 10ms minimum sampling rate from comments in the
cpufreq code (Pierre Gondois).
- Honour transition_latency over transition_delay_us in cpufreq (Qais
Yousef).
- Stop unregistering cpufreq cooling on CPU hot-remove (Viresh Kumar).
- General enhancements / cleanups to ARM cpufreq drivers (tianyu2,
Nícolas F. R. A. Prado, Erick Archer, Arnd Bergmann, Anastasia
Belova).
- Update cpufreq-dt-platdev to block/approve devices (Richard Acayan).
- Make the SCMI cpufreq driver get a transition delay value from
firmware (Pierre Gondois).
- Prevent the haltpoll cpuidle governor from shrinking guest
poll_limit_ns below grow_start (Parshuram Sangle).
- Avoid potential overflow in integer multiplication when computing
cpuidle state parameters (C Cheng).
- Adjust MWAIT hint target C-state computation in the ACPI cpuidle
driver and in intel_idle to return a correct value for C0 (He
Rongguang).
- Address multiple issues in the TPMI RAPL driver and add support for
new platforms (Lunar Lake-M, Arrow Lake) to Intel RAPL (Zhang Rui).
- Fix freq_qos_add_request() return value check in dtpm_cpu (Daniel
Lezcano).
- Fix kernel-doc for dtpm_create_hierarchy() (Yang Li).
- Fix file leak in get_pkg_num() in x86_energy_perf_policy (Samasth
Norway Ananda).
- Fix cpupower-frequency-info.1 man page typo (Jan Kratochvil).
- Fix a couple of warnings in the OPP core code related to W=1
builds (Viresh Kumar).
- Move dev_pm_opp_{init|free}_cpufreq_table() to pm_opp.h (Viresh
Kumar).
- Extend dev_pm_opp_data with turbo support (Sibi Sankar).
- dt-bindings: drop maxItems from inner items (David Heidelberg).
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Merge tag 'pm-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"From the functional perspective, the most significant change here is
the addition of support for Energy Models that can be updated
dynamically at run time.
There is also the addition of LZ4 compression support for hibernation,
the new preferred core support in amd-pstate, new platforms support in
the Intel RAPL driver, new model-specific EPP handling in intel_pstate
and more.
Apart from that, the cpufreq default transition delay is reduced from
10 ms to 2 ms (along with some related adjustments), the system
suspend statistics code undergoes a significant rework and there is a
usual bunch of fixes and code cleanups all over.
Specifics:
- Allow the Energy Model to be updated dynamically (Lukasz Luba)
- Add support for LZ4 compression algorithm to the hibernation image
creation and loading code (Nikhil V)
- Fix and clean up system suspend statistics collection (Rafael
Wysocki)
- Simplify device suspend and resume handling in the power management
core code (Rafael Wysocki)
- Fix PCI hibernation support description (Yiwei Lin)
- Make hibernation take set_memory_ro() return values into account as
appropriate (Christophe Leroy)
- Set mem_sleep_current during kernel command line setup to avoid an
ordering issue with handling it (Maulik Shah)
- Fix wake IRQs handling when pm_runtime_force_suspend() is used as a
driver's system suspend callback (Qingliang Li)
- Simplify pm_runtime_get_if_active() usage and add a replacement for
pm_runtime_put_autosuspend() (Sakari Ailus)
- Add a tracepoint for runtime_status changes tracking (Vilas Bhat)
- Fix section title markdown in the runtime PM documentation (Yiwei
Lin)
- Enable preferred core support in the amd-pstate cpufreq driver
(Meng Li)
- Fix min_perf assignment in amd_pstate_adjust_perf() and make the
min/max limit perf values in amd-pstate always stay within the
(highest perf, lowest perf) range (Tor Vic, Meng Li)
- Allow intel_pstate to assign model-specific values to strings used
in the EPP sysfs interface and make it do so on Meteor Lake
(Srinivas Pandruvada)
- Drop long-unused cpudata::prev_cummulative_iowait from the
intel_pstate cpufreq driver (Jiri Slaby)
- Prevent scaling_cur_freq from exceeding scaling_max_freq when the
latter is an inefficient frequency (Shivnandan Kumar)
- Change default transition delay in cpufreq to 2ms (Qais Yousef)
- Remove references to 10ms minimum sampling rate from comments in
the cpufreq code (Pierre Gondois)
- Honour transition_latency over transition_delay_us in cpufreq (Qais
Yousef)
- Stop unregistering cpufreq cooling on CPU hot-remove (Viresh Kumar)
- General enhancements / cleanups to ARM cpufreq drivers (tianyu2,
Nícolas F. R. A. Prado, Erick Archer, Arnd Bergmann, Anastasia
Belova)
- Update cpufreq-dt-platdev to block/approve devices (Richard Acayan)
- Make the SCMI cpufreq driver get a transition delay value from
firmware (Pierre Gondois)
- Prevent the haltpoll cpuidle governor from shrinking guest
poll_limit_ns below grow_start (Parshuram Sangle)
- Avoid potential overflow in integer multiplication when computing
cpuidle state parameters (C Cheng)
- Adjust MWAIT hint target C-state computation in the ACPI cpuidle
driver and in intel_idle to return a correct value for C0 (He
Rongguang)
- Address multiple issues in the TPMI RAPL driver and add support for
new platforms (Lunar Lake-M, Arrow Lake) to Intel RAPL (Zhang Rui)
- Fix freq_qos_add_request() return value check in dtpm_cpu (Daniel
Lezcano)
- Fix kernel-doc for dtpm_create_hierarchy() (Yang Li)
- Fix file leak in get_pkg_num() in x86_energy_perf_policy (Samasth
Norway Ananda)
- Fix cpupower-frequency-info.1 man page typo (Jan Kratochvil)
- Fix a couple of warnings in the OPP core code related to W=1 builds
(Viresh Kumar)
- Move dev_pm_opp_{init|free}_cpufreq_table() to pm_opp.h (Viresh
Kumar)
- Extend dev_pm_opp_data with turbo support (Sibi Sankar)
- dt-bindings: drop maxItems from inner items (David Heidelberg)"
* tag 'pm-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (95 commits)
dt-bindings: opp: drop maxItems from inner items
OPP: debugfs: Fix warning around icc_get_name()
OPP: debugfs: Fix warning with W=1 builds
cpufreq: Move dev_pm_opp_{init|free}_cpufreq_table() to pm_opp.h
OPP: Extend dev_pm_opp_data with turbo support
Fix cpupower-frequency-info.1 man page typo
cpufreq: scmi: Set transition_delay_us
firmware: arm_scmi: Populate fast channel rate_limit
firmware: arm_scmi: Populate perf commands rate_limit
cpuidle: ACPI/intel: fix MWAIT hint target C-state computation
PM: sleep: wakeirq: fix wake irq warning in system suspend
powercap: dtpm: Fix kernel-doc for dtpm_create_hierarchy() function
cpufreq: Don't unregister cpufreq cooling on CPU hotplug
PM: suspend: Set mem_sleep_current during kernel command line setup
cpufreq: Honour transition_latency over transition_delay_us
cpufreq: Limit resolving a frequency to policy min/max
Documentation: PM: Fix runtime_pm.rst markdown syntax
cpufreq: amd-pstate: adjust min/max limit perf
cpufreq: Remove references to 10ms min sampling rate
cpufreq: intel_pstate: Update default EPPs for Meteor Lake
...
|
||
|
Linus Torvalds
|
8c9c2f851b |
IOMMU Updates for Linux v6.9
Including:
- Core changes:
- Constification of bus_type pointer
- Preparations for user-space page-fault delivery
- Use a named kmem_cache for IOVA magazines
- Intel VT-d changes from Lu Baolu:
- Add RBTree to track iommu probed devices
- Add Intel IOMMU debugfs document
- Cleanup and refactoring
- ARM-SMMU Updates from Will Deacon:
- Device-tree binding updates for a bunch of Qualcomm SoCs
- SMMUv2: Support for Qualcomm X1E80100 MDSS
- SMMUv3: Significant rework of the driver's STE manipulation and
domain handling code. This is the initial part of a larger scale
rework aiming to improve the driver's implementation of the
IOMMU-API in preparation for hooking up IOMMUFD support.
- AMD-Vi Updates:
- Refactor GCR3 table support for SVA
- Cleanups
- Some smaller cleanups and fixes
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Merge tag 'iommu-updates-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu updates from Joerg Roedel:
"Core changes:
- Constification of bus_type pointer
- Preparations for user-space page-fault delivery
- Use a named kmem_cache for IOVA magazines
Intel VT-d changes from Lu Baolu:
- Add RBTree to track iommu probed devices
- Add Intel IOMMU debugfs document
- Cleanup and refactoring
ARM-SMMU Updates from Will Deacon:
- Device-tree binding updates for a bunch of Qualcomm SoCs
- SMMUv2: Support for Qualcomm X1E80100 MDSS
- SMMUv3: Significant rework of the driver's STE manipulation and
domain handling code. This is the initial part of a larger scale
rework aiming to improve the driver's implementation of the
IOMMU-API in preparation for hooking up IOMMUFD support.
AMD-Vi Updates:
- Refactor GCR3 table support for SVA
- Cleanups
Some smaller cleanups and fixes"
* tag 'iommu-updates-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (88 commits)
iommu: Fix compilation without CONFIG_IOMMU_INTEL
iommu/amd: Fix sleeping in atomic context
iommu/dma: Document min_align_mask assumption
iommu/vt-d: Remove scalabe mode in domain_context_clear_one()
iommu/vt-d: Remove scalable mode context entry setup from attach_dev
iommu/vt-d: Setup scalable mode context entry in probe path
iommu/vt-d: Fix NULL domain on device release
iommu: Add static iommu_ops->release_domain
iommu/vt-d: Improve ITE fault handling if target device isn't present
iommu/vt-d: Don't issue ATS Invalidation request when device is disconnected
PCI: Make pci_dev_is_disconnected() helper public for other drivers
iommu/vt-d: Use device rbtree in iopf reporting path
iommu/vt-d: Use rbtree to track iommu probed devices
iommu/vt-d: Merge intel_svm_bind_mm() into its caller
iommu/vt-d: Remove initialization for dynamically heap-allocated rcu_head
iommu/vt-d: Remove treatment for revoking PASIDs with pending page faults
iommu/vt-d: Add the document for Intel IOMMU debugfs
iommu/vt-d: Use kcalloc() instead of kzalloc()
iommu/vt-d: Remove INTEL_IOMMU_BROKEN_GFX_WA
iommu: re-use local fwnode variable in iommu_ops_from_fwnode()
...
|
||
|
Linus Torvalds
|
9187210eee |
Networking changes for 6.9.
Core & protocols
----------------
- Large effort by Eric to lower rtnl_lock pressure and remove locks:
- Make commonly used parts of rtnetlink (address, route dumps etc.)
lockless, protected by RCU instead of rtnl_lock.
- Add a netns exit callback which already holds rtnl_lock,
allowing netns exit to take rtnl_lock once in the core
instead of once for each driver / callback.
- Remove locks / serialization in the socket diag interface.
- Remove 6 calls to synchronize_rcu() while holding rtnl_lock.
- Remove the dev_base_lock, depend on RCU where necessary.
- Support busy polling on a per-epoll context basis. Poll length
and budget parameters can be set independently of system defaults.
- Introduce struct net_hotdata, to make sure read-mostly global config
variables fit in as few cache lines as possible.
- Add optional per-nexthop statistics to ease monitoring / debug
of ECMP imbalance problems.
- Support TCP_NOTSENT_LOWAT in MPTCP.
- Ensure that IPv6 temporary addresses' preferred lifetimes are long
enough, compared to other configured lifetimes, and at least 2 sec.
- Support forwarding of ICMP Error messages in IPSec, per RFC 4301.
- Add support for the independent control state machine for bonding
per IEEE 802.1AX-2008 5.4.15 in addition to the existing coupled
control state machine.
- Add "network ID" to MCTP socket APIs to support hosts with multiple
disjoint MCTP networks.
- Re-use the mono_delivery_time skbuff bit for packets which user
space wants to be sent at a specified time. Maintain the timing
information while traversing veth links, bridge etc.
- Take advantage of MSG_SPLICE_PAGES for RxRPC DATA and ACK packets.
- Simplify many places iterating over netdevs by using an xarray
instead of a hash table walk (hash table remains in place, for
use on fastpaths).
- Speed up scanning for expired routes by keeping a dedicated list.
- Speed up "generic" XDP by trying harder to avoid large allocations.
- Support attaching arbitrary metadata to netconsole messages.
Things we sprinkled into general kernel code
--------------------------------------------
- Enforce VM_IOREMAP flag and range in ioremap_page_range and introduce
VM_SPARSE kind and vm_area_[un]map_pages (used by bpf_arena).
- Rework selftest harness to enable the use of the full range of
ksft exit code (pass, fail, skip, xfail, xpass).
Netfilter
---------
- Allow userspace to define a table that is exclusively owned by a daemon
(via netlink socket aliveness) without auto-removing this table when
the userspace program exits. Such table gets marked as orphaned and
a restarting management daemon can re-attach/regain ownership.
- Speed up element insertions to nftables' concatenated-ranges set type.
Compact a few related data structures.
BPF
---
- Add BPF token support for delegating a subset of BPF subsystem
functionality from privileged system-wide daemons such as systemd
through special mount options for userns-bound BPF fs to a trusted
& unprivileged application.
- Introduce bpf_arena which is sparse shared memory region between BPF
program and user space where structures inside the arena can have
pointers to other areas of the arena, and pointers work seamlessly
for both user-space programs and BPF programs.
- Introduce may_goto instruction that is a contract between the verifier
and the program. The verifier allows the program to loop assuming it's
behaving well, but reserves the right to terminate it.
- Extend the BPF verifier to enable static subprog calls in spin lock
critical sections.
- Support registration of struct_ops types from modules which helps
projects like fuse-bpf that seeks to implement a new struct_ops type.
- Add support for retrieval of cookies for perf/kprobe multi links.
- Support arbitrary TCP SYN cookie generation / validation in the TC
layer with BPF to allow creating SYN flood handling in BPF firewalls.
- Add code generation to inline the bpf_kptr_xchg() helper which
improves performance when stashing/popping the allocated BPF objects.
Wireless
--------
- Add SPP (signaling and payload protected) AMSDU support.
- Support wider bandwidth OFDMA, as required for EHT operation.
Driver API
----------
- Major overhaul of the Energy Efficient Ethernet internals to support
new link modes (2.5GE, 5GE), share more code between drivers
(especially those using phylib), and encourage more uniform behavior.
Convert and clean up drivers.
- Define an API for querying per netdev queue statistics from drivers.
- IPSec: account in global stats for fully offloaded sessions.
- Create a concept of Ethernet PHY Packages at the Device Tree level,
to allow parameterizing the existing PHY package code.
- Enable Rx hashing (RSS) on GTP protocol fields.
Misc
----
- Improvements and refactoring all over networking selftests.
- Create uniform module aliases for TC classifiers, actions,
and packet schedulers to simplify creating modprobe policies.
- Address all missing MODULE_DESCRIPTION() warnings in networking.
- Extend the Netlink descriptions in YAML to cover message encapsulation
or "Netlink polymorphism", where interpretation of nested attributes
depends on link type, classifier type or some other "class type".
Drivers
-------
- Ethernet high-speed NICs:
- Add a new driver for Marvell's Octeon PCI Endpoint NIC VF.
- Intel (100G, ice, idpf):
- support E825-C devices
- nVidia/Mellanox:
- support devices with one port and multiple PCIe links
- Broadcom (bnxt):
- support n-tuple filters
- support configuring the RSS key
- Wangxun (ngbe/txgbe):
- implement irq_domain for TXGBE's sub-interrupts
- Pensando/AMD:
- support XDP
- optimize queue submission and wakeup handling (+17% bps)
- optimize struct layout, saving 28% of memory on queues
- Ethernet NICs embedded and virtual:
- Google cloud vNIC:
- refactor driver to perform memory allocations for new queue
config before stopping and freeing the old queue memory
- Synopsys (stmmac):
- obey queueMaxSDU and implement counters required by 802.1Qbv
- Renesas (ravb):
- support packet checksum offload
- suspend to RAM and runtime PM support
- Ethernet switches:
- nVidia/Mellanox:
- support for nexthop group statistics
- Microchip:
- ksz8: implement PHY loopback
- add support for KSZ8567, a 7-port 10/100Mbps switch
- PTP:
- New driver for RENESAS FemtoClock3 Wireless clock generator.
- Support OCP PTP cards designed and built by Adva.
- CAN:
- Support recvmsg() flags for own, local and remote traffic
on CAN BCM sockets.
- Support for esd GmbH PCIe/402 CAN device family.
- m_can:
- Rx/Tx submission coalescing
- wake on frame Rx
- WiFi:
- Intel (iwlwifi):
- enable signaling and payload protected A-MSDUs
- support wider-bandwidth OFDMA
- support for new devices
- bump FW API to 89 for AX devices; 90 for BZ/SC devices
- MediaTek (mt76):
- mt7915: newer ADIE version support
- mt7925: radio temperature sensor support
- Qualcomm (ath11k):
- support 6 GHz station power modes: Low Power Indoor (LPI),
Standard Power) SP and Very Low Power (VLP)
- QCA6390 & WCN6855: support 2 concurrent station interfaces
- QCA2066 support
- Qualcomm (ath12k):
- refactoring in preparation for Multi-Link Operation (MLO) support
- 1024 Block Ack window size support
- firmware-2.bin support
- support having multiple identical PCI devices (firmware needs to
have ATH12K_FW_FEATURE_MULTI_QRTR_ID)
- QCN9274: support split-PHY devices
- WCN7850: enable Power Save Mode in station mode
- WCN7850: P2P support
- RealTek:
- rtw88: support for more rtw8811cu and rtw8821cu devices
- rtw89: support SCAN_RANDOM_SN and SET_SCAN_DWELL
- rtlwifi: speed up USB firmware initialization
- rtwl8xxxu:
- RTL8188F: concurrent interface support
- Channel Switch Announcement (CSA) support in AP mode
- Broadcom (brcmfmac):
- per-vendor feature support
- per-vendor SAE password setup
- DMI nvram filename quirk for ACEPC W5 Pro
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-next-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core & protocols:
- Large effort by Eric to lower rtnl_lock pressure and remove locks:
- Make commonly used parts of rtnetlink (address, route dumps
etc) lockless, protected by RCU instead of rtnl_lock.
- Add a netns exit callback which already holds rtnl_lock,
allowing netns exit to take rtnl_lock once in the core instead
of once for each driver / callback.
- Remove locks / serialization in the socket diag interface.
- Remove 6 calls to synchronize_rcu() while holding rtnl_lock.
- Remove the dev_base_lock, depend on RCU where necessary.
- Support busy polling on a per-epoll context basis. Poll length and
budget parameters can be set independently of system defaults.
- Introduce struct net_hotdata, to make sure read-mostly global
config variables fit in as few cache lines as possible.
- Add optional per-nexthop statistics to ease monitoring / debug of
ECMP imbalance problems.
- Support TCP_NOTSENT_LOWAT in MPTCP.
- Ensure that IPv6 temporary addresses' preferred lifetimes are long
enough, compared to other configured lifetimes, and at least 2 sec.
- Support forwarding of ICMP Error messages in IPSec, per RFC 4301.
- Add support for the independent control state machine for bonding
per IEEE 802.1AX-2008 5.4.15 in addition to the existing coupled
control state machine.
- Add "network ID" to MCTP socket APIs to support hosts with multiple
disjoint MCTP networks.
- Re-use the mono_delivery_time skbuff bit for packets which user
space wants to be sent at a specified time. Maintain the timing
information while traversing veth links, bridge etc.
- Take advantage of MSG_SPLICE_PAGES for RxRPC DATA and ACK packets.
- Simplify many places iterating over netdevs by using an xarray
instead of a hash table walk (hash table remains in place, for use
on fastpaths).
- Speed up scanning for expired routes by keeping a dedicated list.
- Speed up "generic" XDP by trying harder to avoid large allocations.
- Support attaching arbitrary metadata to netconsole messages.
Things we sprinkled into general kernel code:
- Enforce VM_IOREMAP flag and range in ioremap_page_range and
introduce VM_SPARSE kind and vm_area_[un]map_pages (used by
bpf_arena).
- Rework selftest harness to enable the use of the full range of ksft
exit code (pass, fail, skip, xfail, xpass).
Netfilter:
- Allow userspace to define a table that is exclusively owned by a
daemon (via netlink socket aliveness) without auto-removing this
table when the userspace program exits. Such table gets marked as
orphaned and a restarting management daemon can re-attach/regain
ownership.
- Speed up element insertions to nftables' concatenated-ranges set
type. Compact a few related data structures.
BPF:
- Add BPF token support for delegating a subset of BPF subsystem
functionality from privileged system-wide daemons such as systemd
through special mount options for userns-bound BPF fs to a trusted
& unprivileged application.
- Introduce bpf_arena which is sparse shared memory region between
BPF program and user space where structures inside the arena can
have pointers to other areas of the arena, and pointers work
seamlessly for both user-space programs and BPF programs.
- Introduce may_goto instruction that is a contract between the
verifier and the program. The verifier allows the program to loop
assuming it's behaving well, but reserves the right to terminate
it.
- Extend the BPF verifier to enable static subprog calls in spin lock
critical sections.
- Support registration of struct_ops types from modules which helps
projects like fuse-bpf that seeks to implement a new struct_ops
type.
- Add support for retrieval of cookies for perf/kprobe multi links.
- Support arbitrary TCP SYN cookie generation / validation in the TC
layer with BPF to allow creating SYN flood handling in BPF
firewalls.
- Add code generation to inline the bpf_kptr_xchg() helper which
improves performance when stashing/popping the allocated BPF
objects.
Wireless:
- Add SPP (signaling and payload protected) AMSDU support.
- Support wider bandwidth OFDMA, as required for EHT operation.
Driver API:
- Major overhaul of the Energy Efficient Ethernet internals to
support new link modes (2.5GE, 5GE), share more code between
drivers (especially those using phylib), and encourage more
uniform behavior. Convert and clean up drivers.
- Define an API for querying per netdev queue statistics from
drivers.
- IPSec: account in global stats for fully offloaded sessions.
- Create a concept of Ethernet PHY Packages at the Device Tree level,
to allow parameterizing the existing PHY package code.
- Enable Rx hashing (RSS) on GTP protocol fields.
Misc:
- Improvements and refactoring all over networking selftests.
- Create uniform module aliases for TC classifiers, actions, and
packet schedulers to simplify creating modprobe policies.
- Address all missing MODULE_DESCRIPTION() warnings in networking.
- Extend the Netlink descriptions in YAML to cover message
encapsulation or "Netlink polymorphism", where interpretation of
nested attributes depends on link type, classifier type or some
other "class type".
Drivers:
- Ethernet high-speed NICs:
- Add a new driver for Marvell's Octeon PCI Endpoint NIC VF.
- Intel (100G, ice, idpf):
- support E825-C devices
- nVidia/Mellanox:
- support devices with one port and multiple PCIe links
- Broadcom (bnxt):
- support n-tuple filters
- support configuring the RSS key
- Wangxun (ngbe/txgbe):
- implement irq_domain for TXGBE's sub-interrupts
- Pensando/AMD:
- support XDP
- optimize queue submission and wakeup handling (+17% bps)
- optimize struct layout, saving 28% of memory on queues
- Ethernet NICs embedded and virtual:
- Google cloud vNIC:
- refactor driver to perform memory allocations for new queue
config before stopping and freeing the old queue memory
- Synopsys (stmmac):
- obey queueMaxSDU and implement counters required by 802.1Qbv
- Renesas (ravb):
- support packet checksum offload
- suspend to RAM and runtime PM support
- Ethernet switches:
- nVidia/Mellanox:
- support for nexthop group statistics
- Microchip:
- ksz8: implement PHY loopback
- add support for KSZ8567, a 7-port 10/100Mbps switch
- PTP:
- New driver for RENESAS FemtoClock3 Wireless clock generator.
- Support OCP PTP cards designed and built by Adva.
- CAN:
- Support recvmsg() flags for own, local and remote traffic on CAN
BCM sockets.
- Support for esd GmbH PCIe/402 CAN device family.
- m_can:
- Rx/Tx submission coalescing
- wake on frame Rx
- WiFi:
- Intel (iwlwifi):
- enable signaling and payload protected A-MSDUs
- support wider-bandwidth OFDMA
- support for new devices
- bump FW API to 89 for AX devices; 90 for BZ/SC devices
- MediaTek (mt76):
- mt7915: newer ADIE version support
- mt7925: radio temperature sensor support
- Qualcomm (ath11k):
- support 6 GHz station power modes: Low Power Indoor (LPI),
Standard Power) SP and Very Low Power (VLP)
- QCA6390 & WCN6855: support 2 concurrent station interfaces
- QCA2066 support
- Qualcomm (ath12k):
- refactoring in preparation for Multi-Link Operation (MLO)
support
- 1024 Block Ack window size support
- firmware-2.bin support
- support having multiple identical PCI devices (firmware needs
to have ATH12K_FW_FEATURE_MULTI_QRTR_ID)
- QCN9274: support split-PHY devices
- WCN7850: enable Power Save Mode in station mode
- WCN7850: P2P support
- RealTek:
- rtw88: support for more rtw8811cu and rtw8821cu devices
- rtw89: support SCAN_RANDOM_SN and SET_SCAN_DWELL
- rtlwifi: speed up USB firmware initialization
- rtwl8xxxu:
- RTL8188F: concurrent interface support
- Channel Switch Announcement (CSA) support in AP mode
- Broadcom (brcmfmac):
- per-vendor feature support
- per-vendor SAE password setup
- DMI nvram filename quirk for ACEPC W5 Pro"
* tag 'net-next-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2255 commits)
nexthop: Fix splat with CONFIG_DEBUG_PREEMPT=y
nexthop: Fix out-of-bounds access during attribute validation
nexthop: Only parse NHA_OP_FLAGS for dump messages that require it
nexthop: Only parse NHA_OP_FLAGS for get messages that require it
bpf: move sleepable flag from bpf_prog_aux to bpf_prog
bpf: hardcode BPF_PROG_PACK_SIZE to 2MB * num_possible_nodes()
selftests/bpf: Add kprobe multi triggering benchmarks
ptp: Move from simple ida to xarray
vxlan: Remove generic .ndo_get_stats64
vxlan: Do not alloc tstats manually
devlink: Add comments to use netlink gen tool
nfp: flower: handle acti_netdevs allocation failure
net/packet: Add getsockopt support for PACKET_COPY_THRESH
net/netlink: Add getsockopt support for NETLINK_LISTEN_ALL_NSID
selftests/bpf: Add bpf_arena_htab test.
selftests/bpf: Add bpf_arena_list test.
selftests/bpf: Add unit tests for bpf_arena_alloc/free_pages
bpf: Add helper macro bpf_addr_space_cast()
libbpf: Recognize __arena global variables.
bpftool: Recognize arena map type
...
|
||
|
Bjorn Helgaas
|
aabf7173cd |
Merge branch 'pci/controller/qcom'
- Split dt-binding qcom,pcie.yaml into qcom,pcie-common.yaml and separate files for SA8775p, SC7280, SC8180X, SC8280XP, SM8150, SM8250, SM8350, SM8450, SM8550 for easier reviewing (Krzysztof Kozlowski) - Allow 'required-opps' DT property for SoCs that require a minimum performance level for the power domain (Johan Hovold) - Remove requirement for 'msi-map-mask' DT property since it depends on how MSIs are mapped (Johan Hovold) - Disable ASPM L0s for sc8280xp, sa8540p and sa8295p because their PHY configuration isn't tuned for L0s, which results in many Correctable Errors (Johan Hovold) - Enable BDF to SID translation by disabling bypass mode (Manivannan Sadhasivam) - Add DT binding and driver support for X1E80100 (Abel Vesa) * pci/controller/qcom: PCI: qcom: Add X1E80100 PCIe support dt-bindings: PCI: qcom: Document the X1E80100 PCIe Controller PCI: qcom: Enable BDF to SID translation properly PCI: qcom: Disable ASPM L0s for sc8280xp, sa8540p and sa8295p dt-bindings: PCI: qcom: Do not require 'msi-map-mask' dt-bindings: PCI: qcom: Allow 'required-opps' dt-bindings: PCI: qcom,pcie-sa8775p: Move SA8775p to dedicated schema dt-bindings: PCI: qcom,pcie-sc7280: Move SC7280 to dedicated schema dt-bindings: PCI: qcom,pcie-sc8180x: Move SC8180X to dedicated schema dt-bindings: PCI: qcom,pcie-sc8280xp: Move SC8280XP to dedicated schema dt-bindings: PCI: qcom,pcie-sm8350: Move SM8350 to dedicated schema dt-bindings: PCI: qcom,pcie-sm8150: Move SM8150 to dedicated schema dt-bindings: PCI: qcom,pcie-sm8250: Move SM8250 to dedicated schema dt-bindings: PCI: qcom,pcie-sm8450: Move SM8450 to dedicated schema dt-bindings: PCI: qcom,pcie-sm8550: Move SM8550 to dedicated schema |
||
|
Bjorn Helgaas
|
45b2987e68 |
Merge branch 'pci/controller/imx'
- Replace variant switches with drvdata clock descriptions and clk_bulk API (Frank Li) - Replace variant switches with drvdata PHY flag for devm_phy_get() (Frank Li) - Replace variant switches with drvdata HAS_RESET flags for handling resets (Frank Li) - Replace variant switches with drvdata for LTSSM control bits (Frank Li) - Replace variant switches with drvdata for controller Root Complex vs Endpoint modes (Frank Li) - Replace variant switches with drvdata .init_phy() callback pointers (Frank Li) - Drop dt-binding redundant duplicate clock check (Frank Li) - reg/reg-name (Frank Li) - Drop addr_space retrieval code since dw_pcie_ep_init() already does it (Frank Li) - Add epc_features to drvdata (Frank Li) - Add iMX95 Root Complex and Endpoint support and dt-binding compatible strings (Frank Li) * pci/controller/imx: PCI: imx6: Add iMX95 Endpoint (EP) support dt-bindings: imx6q-pcie: Add iMX95 pcie endpoint compatible string PCI: imx6: Add epc_features in imx6_pcie_drvdata PCI: imx6: Clean up addr_space retrieval code PCI: imx6: Add iMX95 PCIe Root Complex support dt-bindings: imx6q-pcie: Add imx95 pcie compatible string dt-bindings: imx6q-pcie: Restruct reg and reg-name dt-bindings: imx6q-pcie: Clean up duplicate clocks check PCI: imx6: Simplify switch-case logic by introducing init_phy() callback PCI: imx6: Simplify configure_type() by using mode_off and mode_mask PCI: imx6: Simplify ltssm_enable() by using ltssm_off and ltssm_mask PCI: imx6: Simplify reset handling by using *_FLAG_HAS_*_RESET PCI: imx6: Simplify PHY handling by using IMX6_PCIE_FLAG_HAS_PHYDRV PCI: imx6: Simplify clock handling by using clk_bulk*() function |
||
|
Bjorn Helgaas
|
0b5ce6b2f7 |
Merge branch 'pci/controller/hyperv'
- Fix ring buffer size at 16KB (not 4 pages), which reduces memory usage by 128KBytes with 64KB pages (Michael Kelley) * pci/controller/hyperv: PCI: hv: Fix ring buffer size calculation |
||
|
Bjorn Helgaas
|
92a1d9b877 |
Merge branch 'pci/controller/dwc'
- Fall back to allocating 64-bit MSI DMA address if unable to allocate a 32-bit address (Ajay Agarwal) * pci/controller/dwc: PCI: dwc: endpoint: Fix advertised resizable BAR size PCI: dwc: Strengthen the MSI address allocation logic |
||
|
Bjorn Helgaas
|
538ca00225 |
Merge branch 'pci/controller/cadence'
- Clear the ARI Capability Next Function Number of the last function (Jasko-EXT Wojciech) * pci/controller/cadence: PCI: cadence: Clear the ARI Capability Next Function Number of the last function |
||
|
Bjorn Helgaas
|
cab098b6f2 |
Merge branch 'pci/controller/broadcom'
- Fix polling for MDIO write completion, which previously used the wrong access width so it always indicated "completed" (Jonathan Bell) * pci/controller/broadcom: PCI: brcmstb: Fix broken brcm_pcie_mdio_write() polling |
||
|
Bjorn Helgaas
|
45a516f616 |
Merge branch 'pci/misc'
- Make pcie_port_bus_type const (Ricardo B. Marliere) * pci/misc: PCI: Make pcie_port_bus_type const |
||
|
Bjorn Helgaas
|
f931e3cb96 |
Merge branch 'pci/endpoint'
- Make pci_epf_bus_type const (Ricardo B. Marliere) - Update pci_epf_alloc_space() interface and move bar_fixed_size[] testing from pci_epf_test_alloc_space() and pci_epf_configure_bar() into it (Niklas Cassel) - Drop redundant size & alignment checking from epf_ntb_db_bar_init() since pci_epf_alloc_space() already does it (Niklas Cassel) - Fix ntb_register_device() name leak in error path (Yang Yingliang) - Return actual error code for pci_vntb_probe() failure (Yang Yingliang) - Prefix sysfs function names with "pci_epf_mhi_", e.g., "/sys/kernel/config/functions/pci_epf_mhi_sdx55", to leave room for other endpoint functions (Manivannan Sadhasivam) - Add EPF MHI support for SA8775P SoC (Mrinmay Sarkar) - Consolidate endpoint BAR hardware description in new struct pci_epc_bar_desc (Niklas Cassel) - Drop only_64bit on reserved BARs (Niklas Cassel) * pci/endpoint: PCI: endpoint: Drop only_64bit on reserved BARs PCI: endpoint: Clean up hardware description for BARs PCI: epf-mhi: Add support for SA8775P SoC PCI: epf-mhi: Add "pci_epf_mhi_" prefix to the function names PCI: epf-vntb: Return actual error code during pci_vntb_probe() failure NTB: fix possible name leak in ntb_register_device() PCI: endpoint: pci-epf-vntb: Remove superfluous checks for pci_epf_alloc_space() API PCI: endpoint: pci-epf-test: Remove superfluous checks for pci_epf_alloc_space() API PCI: endpoint: Improve pci_epf_alloc_space() API PCI: endpoint: Refactor pci_epf_alloc_space() API PCI: endpoint: Make pci_epf_bus_type const |
||
|
Bjorn Helgaas
|
c5176fd9e6 |
Merge branch 'pci/virtualization'
- Avoid Secondary Bus Reset on the LSI / Agere FW643, which allows it to be assigned to VMs with VFIO, at the cost of leaking FW643 state between VMs (Edmund Raile) * pci/virtualization: PCI: Mark LSI FW643 to avoid bus reset |
||
|
Bjorn Helgaas
|
b8de187056 |
Merge branch 'pci/sysfs'
- Compile pci-sysfs.c only if CONFIG_SYSFS=y, which reduces kernel size by ~120KB when it's disabled (Lukas Wunner) - Remove obsolete pci_cleanup_rom() declaration (Lukas Wunner) - Rework pci_dev_resource_resize_attr(n) macros to call a function instead of duplicating most of the body, which saves about 2.5KB of text (Ilpo Järvinen) * pci/sysfs: PCI/sysfs: Demacrofy pci_dev_resource_resize_attr(n) functions PCI: Remove obsolete pci_cleanup_rom() declaration PCI/sysfs: Compile pci-sysfs.c only if CONFIG_SYSFS=y # Conflicts: # drivers/pci/Makefile |
||
|
Linus Torvalds
|
691632f0e8 |
s390 updates for 6.9 merge window
- Various virtual vs physical address usage fixes
- Fix error handling in Processor Activity Instrumentation device driver, and
export number of counters with a sysfs file
- Allow for multiple events when Processor Activity Instrumentation counters
are monitored in system wide sampling
- Change multiplier and shift values of the Time-of-Day clock source to improve
steering precision
- Remove a couple of unneeded GFP_DMA flags from allocations
- Disable mmap alignment if randomize_va_space is also disabled, to avoid a too
small heap
- Various changes to allow s390 to be compiled with LLVM=1, since ld.lld and
llvm-objcopy will have proper s390 support witch clang 19
- Add __uninitialized macro to Compiler Attributes. This is helpful with s390's
FPU code where some users have up to 520 byte stack frames. Clearing such
stack frames (if INIT_STACK_ALL_PATTERN or INIT_STACK_ALL_ZERO is enabled)
before they are used contradicts the intention (performance improvement) of
such code sections.
- Convert switch_to() to an out-of-line function, and use the generic switch_to
header file
- Replace the usage of s390's debug feature with pr_debug() calls within the
zcrypt device driver
- Improve hotplug support of the Adjunct Processor device driver
- Improve retry handling in the zcrypt device driver
- Various changes to the in-kernel FPU code:
- Make in-kernel FPU sections preemptible
- Convert various larger inline assemblies and assembler files to C, mainly
by using singe instruction inline assemblies. This increases readability,
but also allows makes it easier to add proper instrumentation hooks
- Cleanup of the header files
- Provide fast variants of csum_partial() and csum_partial_copy_nocheck() based
on vector instructions
- Introduce and use a lock to synchronize accesses to zpci device data
structures to avoid inconsistent states caused by concurrent accesses
- Compile the kernel without -fPIE. This addresses the following problems if
the kernel is compiled with -fPIE:
- It uses dynamic symbols (.dynsym), for which the linker refuses to allow
more than 64k sections. This can break features which use
'-ffunction-sections' and '-fdata-sections', including kpatch-build and
function granular KASLR
- It unnecessarily uses GOT relocations, adding an extra layer of indirection
for many memory accesses
- Fix shared_cpu_list for CPU private L2 caches, which incorrectly were
reported as globally shared
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Merge tag 's390-6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Heiko Carstens:
- Various virtual vs physical address usage fixes
- Fix error handling in Processor Activity Instrumentation device
driver, and export number of counters with a sysfs file
- Allow for multiple events when Processor Activity Instrumentation
counters are monitored in system wide sampling
- Change multiplier and shift values of the Time-of-Day clock source to
improve steering precision
- Remove a couple of unneeded GFP_DMA flags from allocations
- Disable mmap alignment if randomize_va_space is also disabled, to
avoid a too small heap
- Various changes to allow s390 to be compiled with LLVM=1, since
ld.lld and llvm-objcopy will have proper s390 support witch clang 19
- Add __uninitialized macro to Compiler Attributes. This is helpful
with s390's FPU code where some users have up to 520 byte stack
frames. Clearing such stack frames (if INIT_STACK_ALL_PATTERN or
INIT_STACK_ALL_ZERO is enabled) before they are used contradicts the
intention (performance improvement) of such code sections.
- Convert switch_to() to an out-of-line function, and use the generic
switch_to header file
- Replace the usage of s390's debug feature with pr_debug() calls
within the zcrypt device driver
- Improve hotplug support of the Adjunct Processor device driver
- Improve retry handling in the zcrypt device driver
- Various changes to the in-kernel FPU code:
- Make in-kernel FPU sections preemptible
- Convert various larger inline assemblies and assembler files to
C, mainly by using singe instruction inline assemblies. This
increases readability, but also allows makes it easier to add
proper instrumentation hooks
- Cleanup of the header files
- Provide fast variants of csum_partial() and
csum_partial_copy_nocheck() based on vector instructions
- Introduce and use a lock to synchronize accesses to zpci device data
structures to avoid inconsistent states caused by concurrent accesses
- Compile the kernel without -fPIE. This addresses the following
problems if the kernel is compiled with -fPIE:
- It uses dynamic symbols (.dynsym), for which the linker refuses
to allow more than 64k sections. This can break features which
use '-ffunction-sections' and '-fdata-sections', including
kpatch-build and function granular KASLR
- It unnecessarily uses GOT relocations, adding an extra layer of
indirection for many memory accesses
- Fix shared_cpu_list for CPU private L2 caches, which incorrectly were
reported as globally shared
* tag 's390-6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (117 commits)
s390/tools: handle rela R_390_GOTPCDBL/R_390_GOTOFF64
s390/cache: prevent rebuild of shared_cpu_list
s390/crypto: remove retry loop with sleep from PAES pkey invocation
s390/pkey: improve pkey retry behavior
s390/zcrypt: improve zcrypt retry behavior
s390/zcrypt: introduce retries on in-kernel send CPRB functions
s390/ap: introduce mutex to lock the AP bus scan
s390/ap: rework ap_scan_bus() to return true on config change
s390/ap: clarify AP scan bus related functions and variables
s390/ap: rearm APQNs bindings complete completion
s390/configs: increase number of LOCKDEP_BITS
s390/vfio-ap: handle hardware checkstop state on queue reset operation
s390/pai: change sampling event assignment for PMU device driver
s390/boot: fix minor comment style damages
s390/boot: do not check for zero-termination relocation entry
s390/boot: make type of __vmlinux_relocs_64_start|end consistent
s390/boot: sanitize kaslr_adjust_relocs() function prototype
s390/boot: simplify GOT handling
s390: vmlinux.lds.S: fix .got.plt assertion
s390/boot: workaround current 'llvm-objdump -t -j ...' behavior
...
|
||
|
Bjorn Helgaas
|
598b08b775 |
Merge branch 'pci/switchtec'
- Fix error handling path in switchtec_pci_probe() (Christophe JAILLET) * pci/switchtec: PCI: switchtec: Fix an error handling path in switchtec_pci_probe() |
||
|
Bjorn Helgaas
|
7dc249e7b9 |
Merge branch 'pci/pm'
- Disable use of D3cold on Asus B1400 PCI-NVMe bridges because some BIOSes can't power them back on, replacing a more general ACPI sleep quirk (Daniel Drake) - Allow runtime PM when the driver enables it but doesn't need any runtime PM callbacks (Raag Jadav) - Drain runtime-idle callbacks before driver removal to avoid races between .remove() and .runtime_idle(), which caused intermittent page faults when the rtsx .runtime_idle() accessed registers that its .remove() had already unmapped (Rafael J. Wysocki) * pci/pm: PCI/PM: Drain runtime-idle callbacks before driver removal PCI/PM: Allow runtime PM with no PM callbacks at all Revert "ACPI: PM: Block ASUS B1400CEAE from suspend to idle by default" PCI: Disable D3cold on Asus B1400 PCI-NVMe bridge |
||
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Bjorn Helgaas
|
3dfd824796 |
Merge branch 'pci/p2pdma'
- Fix a sleeping issue in a RCU read section (Christophe JAILLET) * pci/p2pdma: PCI/P2PDMA: Fix a sleeping issue in a RCU read section |
||
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Bjorn Helgaas
|
420b8c3606 |
Merge branch 'pci/enumeration'
- Collect interrupt-related code in irq.c (Ilpo Järvinen) - Mark 3ware-9650SE Root Port Extended Tags as broken (Jörg Wedekind) * pci/enumeration: PCI: Mark 3ware-9650SE Root Port Extended Tags as broken PCI: Place interrupt related code into irq.c # Conflicts: # drivers/pci/Makefile |
||
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Bjorn Helgaas
|
c6c411a948 |
Merge branch 'pci/dpc'
- After a DPC event, print all logged TLP Prefixes instead of printing the first prefix several times (Ilpo Järvinen) - Ignore the expected Surprise Down error that may cause a DPC event when hot-removing a device (Smita Koralahalli) - Add an RP PIO log size quirk for Intel Raptor Lake Root Ports, which still don't advertise the correct log size, which prevented logging of RP PIO Log registers when DPC is triggered (Paul Menzel) * pci/dpc: PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root Ports PCI/DPC: Ignore Surprise Down error on hot removal PCI/DPC: Print all TLP Prefixes, not just the first |
||
|
Bjorn Helgaas
|
47c94b2de5 |
Merge branch 'pci/devres'
- Unmap MMIO mappings in pci_iounmap() to avoid a leak when ARCH_HAS_GENERIC_IOPORT_MAP is defined (Philipp Stanner) - Move pci_iomap.c to drivers/pci/ since it's all PCI-related (Philipp Stanner) - Move other PCI-related devres code from lib/devres.c to drivers/pci/ (Philipp Stanner) - Move other devres code from pci.c to devres.c (Philipp Stanner) * pci/devres: PCI: Move devres code from pci.c to devres.c PCI: Move PCI-specific devres code to drivers/pci/ PCI: Move pci_iomap.c to drivers/pci/ pci_iounmap(): Fix MMIO mapping leak |
||
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Bjorn Helgaas
|
239981b669 |
Merge branch 'pci/aspm'
- Collect ASPM-related code into aspm.c (David E. Box) - Save and restore ASPM L1 PM Substates configuration so these states continue working after suspend/resume (David E. Box) - Move the ASPM L1.2-related LTR save/restore next to the ASPM save/restore (David E. Box) - Move the required L1 disable before L1 Substate configuration into pci_restore_aspm_l1ss_state() (Bjorn Helgaas) - Update save_save when ASPM config is changed, so a .slot_reset() during error recovery restores the changed config, not the .probe()-time config (Vidya Sagar) * pci/aspm: PCI/ASPM: Update save_state when configuration changes PCI/ASPM: Disable L1 before configuring L1 Substates PCI/ASPM: Call pci_save_ltr_state() from pci_save_pcie_state() PCI/ASPM: Save L1 PM Substates Capability for suspend/resume PCI/ASPM: Move pci_save_ltr_state() to aspm.c PCI/ASPM: Always build aspm.c PCI/ASPM: Move pci_configure_ltr() to aspm.c |
||
|
Vidya Sagar
|
6d42666752 |
PCI/ASPM: Update save_state when configuration changes
Many PCIe device drivers save the configuration state of their device during probe and restore it when their .slot_reset() hook is called during PCIe error recovery. If the ASPM configuration is changed after the driver's probe is called and before an error event occurs, .slot_reset() restores the ASPM configuration to what it was at the time of probe, not to what it was just before the occurrence of the error event. This leads to a mismatch in ASPM configuration between the device and its upstream device. Update the saved configuration of the device when the ASPM configuration changes. Link: https://lore.kernel.org/r/20240222174436.3565146-1-vidyas@nvidia.com Signed-off-by: Vidya Sagar <vidyas@nvidia.com> [bhelgaas: commit log, rebase to pci/aspm, rename to pci_update_aspm_saved_state() since it updates only LNKCTL, update only ASPMC and CLKREQ_EN in LNKCTL] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Reviewed-by: David E. Box <david.e.box@linux.intel.com> |
||
|
Bjorn Helgaas
|
64dbb2d707 |
PCI/ASPM: Disable L1 before configuring L1 Substates
Per PCIe r6.1, sec 5.5.4, L1 must be disabled while setting ASPM L1 PM Substates enable bits. Previously this was enforced by clearing PCI_EXP_LNKCTL_ASPMC before calling pci_restore_aspm_l1ss_state(). Move the L1 (and L0s, although that doesn't seem required) disable into pci_restore_aspm_l1ss_state() itself so it's closer to the code that depends on it. Link: https://lore.kernel.org/r/20240223213733.GA115410@bhelgaas Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> |
||
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David E. Box
|
c198fafa01 |
PCI/ASPM: Call pci_save_ltr_state() from pci_save_pcie_state()
ASPM state is saved and restored from pci_save/restore_pcie_state(). Since the LTR Capability is linked with ASPM, move the LTR save and restore calls there as well. No functional change intended. Suggested-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20240128233212.1139663-6-david.e.box@linux.intel.com Link: https://lore.kernel.org/r/20240223205851.114931-6-helgaas@kernel.org Signed-off-by: David E. Box <david.e.box@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> |
||
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David E. Box
|
17423360a2 |
PCI/ASPM: Save L1 PM Substates Capability for suspend/resume
|
||
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Alexei Starovoitov
|
d7bca9199a |
mm: Introduce vmap_page_range() to map pages in PCI address space
ioremap_page_range() should be used for ranges within vmalloc range only.
The vmalloc ranges are allocated by get_vm_area(). PCI has "resource"
allocator that manages PCI_IOBASE, IO_SPACE_LIMIT address range, hence
introduce vmap_page_range() to be used exclusively to map pages
in PCI address space.
Fixes:
|
||
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Rafael J. Wysocki
|
7874b581c7 |
Merge branch 'pm-runtime'
Merge changes related to the runtime power management of devices for 6.9-rc1: - Simplify pm_runtime_get_if_active() usage and add a replacement for pm_runtime_put_autosuspend() (Sakari Ailus). - Add a tracepoint for runtime_status changes tracking (Vilas Bhat). - Fix section title markdown in the runtime PM documentation (Yiwei Lin). * pm-runtime: Documentation: PM: Fix runtime_pm.rst markdown syntax PM: runtime: add tracepoint for runtime_status changes PM: runtime: Add pm_runtime_put_autosuspend() replacement PM: runtime: Simplify pm_runtime_get_if_active() usage |
||
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Michael Kelley
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b5ff74c1ef
|
PCI: hv: Fix ring buffer size calculation
For a physical PCI device that is passed through to a Hyper-V guest VM, current code specifies the VMBus ring buffer size as 4 pages. But this is an inappropriate dependency, since the amount of ring buffer space needed is unrelated to PAGE_SIZE. For example, on x86 the ring buffer size ends up as 16 Kbytes, while on ARM64 with 64 Kbyte pages, the ring size bloats to 256 Kbytes. The ring buffer for PCI pass-thru devices is used for only a few messages during device setup and removal, so any space above a few Kbytes is wasted. Fix this by declaring the ring buffer size to be a fixed 16 Kbytes. Furthermore, use the VMBUS_RING_SIZE() macro so that the ring buffer header is properly accounted for, and so the size is rounded up to a page boundary, using the page size for which the kernel is built. While w/64 Kbyte pages this results in a 64 Kbyte ring buffer header plus a 64 Kbyte ring buffer, that's the smallest possible with that page size. It's still 128 Kbytes better than the current code. Link: https://lore.kernel.org/linux-pci/20240216202240.251818-1-mhklinux@outlook.com Signed-off-by: Michael Kelley <mhklinux@outlook.com> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Reviewed-by: Ilpo Jarvinen <ilpo.jarvinen@linux.intel.com> Reviewed-by: Long Li <longli@microsoft.com> Cc: <stable@vger.kernel.org> # 5.15.x |
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Niklas Cassel
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72e34b8593
|
PCI: dwc: endpoint: Fix advertised resizable BAR size
The commit message in commit |
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Jasko-EXT Wojciech
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667a006d73
|
PCI: cadence: Clear the ARI Capability Next Function Number of the last function
Next Function Number field in ARI Capability Register for last function must be zero by default as per the PCIe specification, indicating there is no next higher number function but that's not happening in our case, so this patch clears the Next Function Number field for last function used. [kwilczynski: white spaces update for one define] Link: https://lore.kernel.org/linux-pci/20231202085015.3048516-1-s-vadapalli@ti.com Signed-off-by: Jasko-EXT Wojciech <wojciech.jasko-EXT@continental-corporation.com> Signed-off-by: Achal Verma <a-verma1@ti.com> Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com> |
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Ajay Agarwal
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f3a296405b
|
PCI: dwc: Strengthen the MSI address allocation logic
There can be platforms that do not use/have 32-bit DMA addresses. The current implementation of 32-bit IOVA allocation can fail for such platforms, eventually leading to the probe failure. Try to allocate a 32-bit msi_data. If this allocation fails, attempt a 64-bit address allocation. Please note that if the 64-bit MSI address is allocated, then the EPs supporting 32-bit MSI address only will not work. Link: https://lore.kernel.org/linux-pci/20240221153840.1789979-1-ajayagarwal@google.com Tested-by: Will McVicker <willmcvicker@google.com> Signed-off-by: Ajay Agarwal <ajayagarwal@google.com> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Reviewed-by: Serge Semin <fancer.lancer@gmail.com> Reviewed-by: Will McVicker <willmcvicker@google.com> |
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Jonathan Bell
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039741a8d7
|
PCI: brcmstb: Fix broken brcm_pcie_mdio_write() polling
The MDIO_WT_DONE() macro tests bit 31, which is always 0 (== done) as
readw_poll_timeout_atomic() does a 16-bit read. Replace with the readl
variant.
[kwilczynski: commit log]
Fixes:
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||
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Abel Vesa
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6d0c39324c
|
PCI: qcom: Add X1E80100 PCIe support
Add the compatible and the driver data for X1E80100 PCIe controller. There are 5 controller instances found on this platform, out of which 2 are Gen3 with speeds of up to 8.0GT/s, while the other 3 are Gen4 with speeds of up to 16GT/s. The version of the controller is 1.38.0 for all instances, but they are compatible with 1.9.0 config. The max link width is x8 for one controller, x4 for two of others and x2 for the two left. [kwilczynski: commit log] Link: https://lore.kernel.org/linux-pci/20240301-x1e80100-pci-v4-2-7ab7e281d647@linaro.org Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Abel Vesa <abel.vesa@linaro.org> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> |
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Manivannan Sadhasivam
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bf79e33cdd
|
PCI: qcom: Enable BDF to SID translation properly
Qcom SoCs making use of ARM SMMU require BDF to SID translation table in
the driver to properly map the SID for the PCIe devices based on their BDF
identifier. This is currently achieved with the help of
qcom_pcie_config_sid_1_9_0() function for SoCs supporting the 1_9_0 config.
But With newer Qcom SoCs starting from SM8450, BDF to SID translation is
set to bypass mode by default in hardware. Due to this, the translation
table that is set in the qcom_pcie_config_sid_1_9_0() is essentially
unused and the default SID is used for all endpoints in SoCs starting from
SM8450.
This is a security concern and also warrants swapping the DeviceID in DT
while using the GIC ITS to handle MSIs from endpoints. The swapping is
currently done like below in DT when using GIC ITS:
/*
* MSIs for BDF (1:0.0) only works with Device ID 0x5980.
* Hence, the IDs are swapped.
*/
msi-map = <0x0 &gic_its 0x5981 0x1>,
<0x100 &gic_its 0x5980 0x1>;
Here, swapping of the DeviceIDs ensure that the endpoint with BDF (1:0.0)
gets the DeviceID 0x5980 which is associated with the default SID as per
the iommu mapping in DT. So MSIs were delivered with IDs swapped so far.
But this also means the Root Port (0:0.0) won't receive any MSIs (for PME,
AER etc...)
So let's fix these issues by clearing the BDF to SID bypass mode for all
SoCs making use of the 1_9_0 config. This allows the PCIe devices to use
the correct SID, thus avoiding the DeviceID swapping hack in DT and also
achieving the isolation between devices.
Fixes:
|
||
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Ilpo Järvinen
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0a5a46a6a6 |
PCI/AER: Generalize TLP Header Log reading
Both AER and DPC RP PIO provide TLP Header Log registers (PCIe r6.1 secs 7.8.4 & 7.9.14) to convey error diagnostics but the struct is named after AER as the struct aer_header_log_regs. Also, not all places that handle TLP Header Log use the struct and the struct members are named individually. Generalize the struct name and members, and use it consistently where TLP Header Log is being handled so that a pcie_read_tlp_log() helper can be easily added. Link: https://lore.kernel.org/r/20240206135717.8565-3-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> [bhelgaas: drop ixgbe changes for now, tidy whitespace] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> |
||
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Ilpo Järvinen
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a37e12bcab |
PCI/AER: Use explicit register size for PCI_ERR_CAP
Use u32 for PCIe AER Capability register variable and name it "aercc" (Advanced Error Capabilities and Control register, PCIe r6.1 sec 7.8.4.7) instead of "temp". Link: https://lore.kernel.org/r/20240206135717.8565-2-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> [bhelgaas: make subject more specific and match similar previous patches] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> |
||
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Johan Hovold
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d1997c9878 |
PCI: qcom: Disable ASPM L0s for sc8280xp, sa8540p and sa8295p
Commit |
||
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Joerg Roedel
|
f379a7e9c3 | Merge branches 'arm/mediatek', 'arm/renesas', 'arm/smmu', 'x86/vt-d', 'x86/amd' and 'core' into next | ||
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Stanislaw Gruszka
|
002bf2fbc0 |
PCI/AER: Block runtime suspend when handling errors
PM runtime can be done simultaneously with AER error handling. Avoid that by using pm_runtime_get_sync() before and pm_runtime_put() after reset in pcie_do_recovery() for all recovering devices. pm_runtime_get_sync() will increase dev->power.usage_count counter to prevent any possible future request to runtime suspend a device. It will also resume a device, if it was previously in D3hot state. I tested with igc device by doing simultaneous aer_inject and rpm suspend/resume via /sys/bus/pci/devices/PCI_ID/power/control and can reproduce: igc 0000:02:00.0: not ready 65535ms after bus reset; giving up pcieport 0000:00:1c.2: AER: Root Port link has been reset (-25) pcieport 0000:00:1c.2: AER: subordinate device reset failed pcieport 0000:00:1c.2: AER: device recovery failed igc 0000:02:00.0: Unable to change power state from D3hot to D0, device inaccessible The problem disappears when this patch is applied. Link: https://lore.kernel.org/r/20240212120135.146068-1-stanislaw.gruszka@linux.intel.com Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Acked-by: Rafael J. Wysocki <rafael@kernel.org> Cc: <stable@vger.kernel.org> |
||
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David E. Box
|
1e11b5494c |
PCI/ASPM: Move pci_save_ltr_state() to aspm.c
Even when CONFIG_PCIEASPM is not set, we save and restore the LTR
Capability so that if ASPM L1.2 and LTR were configured by the platform,
ASPM L1.2 will still work after suspend/resume, when that platform
configuration may be lost. See
|
||
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David E. Box
|
f3994bba82 |
PCI/ASPM: Always build aspm.c
Some ASPM-related tasks, such as save and restore of LTR and L1SS capabilities, still need to be performed when CONFIG_PCIEASPM is not enabled. To prepare for these changes, wrap the current code in aspm.c with an #ifdef and always build the file. Link: https://lore.kernel.org/r/20240128233212.1139663-2-david.e.box@linux.intel.com [bhelgaas: split build change from function moves] Link: https://lore.kernel.org/r/20240223205851.114931-3-helgaas@kernel.org Signed-off-by: David E. Box <david.e.box@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> |
||
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David E. Box
|
fa84f4435a |
PCI/ASPM: Move pci_configure_ltr() to aspm.c
The Latency Tolerance Reporting (LTR) mechanism supports the ASPM L1.2 state and is only configured when CONFIG_PCIEASPM is set. Move pci_configure_ltr() and pci_bridge_reconfigure_ltr() into aspm.c since they only build when CONFIG_PCIEASPM is set. No functional change intended. Suggested-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20240128233212.1139663-2-david.e.box@linux.intel.com [bhelgaas: commit log, split build change from function moves] Link: https://lore.kernel.org/r/20240223205851.114931-2-helgaas@kernel.org Signed-off-by: David E. Box <david.e.box@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> |
||
|
Ethan Zhao
|
39714fd73c |
PCI: Make pci_dev_is_disconnected() helper public for other drivers
Make pci_dev_is_disconnected() public so that it can be called from Intel VT-d driver to quickly fix/workaround the surprise removal unplug hang issue for those ATS capable devices on PCIe switch downstream hotplug capable ports. Beside pci_device_is_present() function, this one has no config space space access, so is light enough to optimize the normal pure surprise removal and safe removal flow. Acked-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org> Tested-by: Haorong Ye <yehaorong@bytedance.com> Signed-off-by: Ethan Zhao <haifeng.zhao@linux.intel.com> Link: https://lore.kernel.org/r/20240301080727.3529832-2-haifeng.zhao@linux.intel.com Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> |
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Ilpo Järvinen
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f6c7399983 |
PCI/sysfs: Demacrofy pci_dev_resource_resize_attr(n) functions
pci_dev_resource_resize_attr(n) macro is invoked for six resources,
creating a large footprint function for each resource.
Rework the macro to only create a function that calls a helper function so
the compiler can decide if it warrants to inline the function or not.
With x86_64 defconfig, this saves roughly 2.5kB:
$ scripts/bloat-o-meter drivers/pci/pci-sysfs.o{.old,.new}
add/remove: 1/0 grow/shrink: 0/6 up/down: 512/-2934 (-2422)
Function old new delta
__resource_resize_store - 512 +512
resource5_resize_store 503 14 -489
resource4_resize_store 503 14 -489
resource3_resize_store 503 14 -489
resource2_resize_store 503 14 -489
resource1_resize_store 503 14 -489
resource0_resize_store 500 11 -489
Total: Before=13399, After=10977, chg -18.08%
(The compiler seemingly chose to still inline __resource_resize_show()
which is fine, those functions are not very complex/large.)
Link: https://lore.kernel.org/r/20240222114607.1837-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Lukas Wunner
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2ea548a3c0 |
PCI: Remove obsolete pci_cleanup_rom() declaration
Commit
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Lukas Wunner
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be9c3a4c8b |
PCI/sysfs: Compile pci-sysfs.c only if CONFIG_SYSFS=y
It is possible to enable CONFIG_PCI but disable CONFIG_SYSFS and for
space-constrained devices such as routers, such a configuration may
actually make sense.
However pci-sysfs.c is compiled even if CONFIG_SYSFS is disabled,
unnecessarily increasing the kernel's size.
To rectify that:
* Move pci_mmap_fits() to mmap.c. It is not only needed by
pci-sysfs.c, but also proc.c.
* Move pci_dev_type to probe.c and make it private. It references
pci_dev_attr_groups in pci-sysfs.c. Make that public instead for
consistency with pci_dev_groups, pcibus_groups and pci_bus_groups,
which are likewise public and referenced by struct definitions in
pci-driver.c and probe.c.
* Define pci_dev_groups, pci_dev_attr_groups, pcibus_groups and
pci_bus_groups to NULL if CONFIG_SYSFS is disabled. Provide empty
static inlines for pci_{create,remove}_legacy_files() and
pci_{create,remove}_sysfs_dev_files().
Result:
vmlinux size is reduced by 122996 bytes in my arm 32-bit test build.
Link: https://lore.kernel.org/r/85ca95ae8e4d57ccf082c5c069b8b21eb141846e.1698668982.git.lukas@wunner.de
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
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Paul Menzel
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627c6db207 |
PCI/DPC: Quirk PIO log size for Intel Raptor Lake Root Ports
Commit |
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Rafael J. Wysocki
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9d5286d4e7 |
PCI/PM: Drain runtime-idle callbacks before driver removal
A race condition between the .runtime_idle() callback and the .remove() callback in the rtsx_pcr PCI driver leads to a kernel crash due to an unhandled page fault [1]. The problem is that rtsx_pci_runtime_idle() is not expected to be running after pm_runtime_get_sync() has been called, but the latter doesn't really guarantee that. It only guarantees that the suspend and resume callbacks will not be running when it returns. However, if a .runtime_idle() callback is already running when pm_runtime_get_sync() is called, the latter will notice that the runtime PM status of the device is RPM_ACTIVE and it will return right away without waiting for the former to complete. In fact, it cannot wait for .runtime_idle() to complete because it may be called from that callback (it arguably does not make much sense to do that, but it is not strictly prohibited). Thus in general, whoever is providing a .runtime_idle() callback needs to protect it from running in parallel with whatever code runs after pm_runtime_get_sync(). [Note that .runtime_idle() will not start after pm_runtime_get_sync() has returned, but it may continue running then if it has started earlier.] One way to address that race condition is to call pm_runtime_barrier() after pm_runtime_get_sync() (not before it, because a nonzero value of the runtime PM usage counter is necessary to prevent runtime PM callbacks from being invoked) to wait for the .runtime_idle() callback to complete should it be running at that point. A suitable place for doing that is in pci_device_remove() which calls pm_runtime_get_sync() before removing the driver, so it may as well call pm_runtime_barrier() subsequently, which will prevent the race in question from occurring, not just in the rtsx_pcr driver, but in any PCI drivers providing .runtime_idle() callbacks. Link: https://lore.kernel.org/lkml/20240229062201.49500-1-kai.heng.feng@canonical.com/ # [1] Link: https://lore.kernel.org/r/5761426.DvuYhMxLoT@kreacher Reported-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Tested-by: Ricky Wu <ricky_wu@realtek.com> Acked-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Cc: <stable@vger.kernel.org> |