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Author SHA1 Message Date
Linus Torvalds
570f7e331f pci-v7.3-changes 
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Merge tag 'pci-v7.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Pull PCI updates from Bjorn Helgaas:
 "Resource management:

   - Add hotplug reservation only once (not at each level of the
     hierarchy) so bridge windows don't grow more than necessary (Ilpo
     Järvinen)

  Driver binding:

   - Rework device matching so device ID lifetime only needs to cover
     the probe path since dynamic IDs can be removed at any time (Gary
     Guo)

  Error handling:

   - Update mappings of AER errors to agent & layer and log them for
     each individual error when multiple errors detected (Lukas Wunner)

   - Log Error Source only once, not twice in separate messages (Lukas
     Wunner)

   - Emit TLP Log only for unmasked errors (Lukas Wunner)

   - Support Advisory Non-Fatal Errors (Lukas Wunner)

   - Allow DPC on all Downstream Ports, not just Root Ports, when OS
     controls AER (Darshit Shah)

  ASPM:

   - Program the same ASPM Control values for every function of
     multi-function devices, as recommended by the PCIe spec (Krishna
     Chaitanya Chundru)

   - Avoid L0s for Realtek RTS525A, where it causes an AER interrupt
     storm (Max Lee)

   - Avoid ASPM L0s, L1, and L1 PM Substates based on 'aspm-no-l0s',
     'aspm-no-l1' [1], and 'aspm-no-l1ss' DT properties (Krishna
     Chaitanya Chundru)

  Power management:

   - Allow D3 for native hotplug-capable Root Ports on non-x86 platforms
     (we avoid D3 for these ports on x86 because some old platforms
     didn't validate it) (Manivannan Sadhasivam)

   - Allow portdrv to claim Ports even if they don't support services
     (AER, PME, DPC, hotplug, etc) so it can do power management (Brian
     Norris)

  Power control:

   - Add support for PCIe WAKE# interrupt when described via DT (Krishna
     Chaitanya Chundru)

   - For the TC9563 PCIe switch:

       - Take a reference on the I2C adapter to avoid uninterruptible
         hang when unloading an I2C module while in-use (Johan Hovold)

       - Update DT binding and driver to restrict Tx Amplitude, DFE and
         N_FTS to USP, DSP1 and DSP2 (Manivannan Sadhasivam)

       - Power off only external-facing ports (DSP1, DSP2), leaving USP
         and DSP3 (aka VDSP) powered up (Manivannan Sadhasivam)

       - Move integrated MAC Endpoint out of the list of internal ports
         and configure it separately (Manivannan Sadhasivam)

  Virtualization:

   - Add ACS quirk for Pericom PI7C9X2G608 switches (Tim Harvey)

   - Fix a long-standing bug in the Intel PCH Root Port MPC ACS quirk
     that didn't update the intended INTEL_MPC_REG_IRBNCE bit because it
     used a 16-bit config write when a 32-bit write was intended
     (Mohamad Raizudeen)

  Procfs:

   - Avoid spurious runtime PM wakeup on config space accesses that are
     outside config space and fail before reaching PCI (Krzysztof
     Wilczyński)

   - Warn on user-space writes to kernel-exclusive config space regions,
     as we already do for sysfs (Krzysztof Wilczyński)

   - Check credentials of opener, not reader, for config space reads, as
     we already do for sysfs (Krzysztof Wilczyński)

  Sysfs:

   - In pci_write_legacy_io(), avoid out-of-bounds reads from the user
     buffer and fix incorrect ioport write data (1-byte writes on
     little-endian powerpc, 2- and 4-byte writes on big-endian powerpc)
     (Krzysztof Wilczyński)

   - In pci_read_legacy_io(), fix incorrect ioport read data for 2- and
     4-byte reads on big-endian powerpc (Krzysztof Wilczyński)

   - Fix I/O port accessor argument order in Alpha pci_legacy_write()
     (Krzysztof Wilczyński)

   - Avoid spurious runtime PM wakeup on config space accesses that are
     outside config space and fail before reaching PCI (Krzysztof
     Wilczyński)

   - Return -EINVAL, not -ENODEV, for mmap of I/O BAR that fails because
     the arch doesn't support it, as we do for procfs (Krzysztof
     Wilczyński)

   - Check for LOCKDOWN_PCI_ACCESS for legacy_io and legacy_mem, as we
     do for other config space accessors (Krzysztof Wilczyński)

  Peer-to-peer DMA:

   - Add Nvidia Vera Rubin to list of platforms that support P2PDMA
     (Leon Romanovsky)

  Endpoint framework:

   - Check doorbell SUCCESS bit in pci_endpoint_test to avoid treating
     some failures as successes (Niklas Cassel)

   - Fail doorbell test when the trigger IRQ is missed (Niklas Cassel)

  New native PCIe controller drivers:

   - Add DT binding and driver for NVIDIA Tegra264 (Thierry Reding)

  Native PCIe controllers:

   - Use common wait time definitions for PCIe link monitoring instead
     of defining driver-private duplicates (Thierry Reding)

  Generic host bridge driver:

   - Fix NULL pointer dereference that caused enumeration failures on
     32-bit CAM systems (Steffen Persvold)

  Amlogic Meson PCIe controller driver:

   - Correct the PERST# GPIO state so it remains asserted until power
     and REFCLK become stable to fix enumeration failure (Ronald
     Claveau)

  ASPEED PCIe controller driver:

   - Switch to irq_domain_create_linear() so we can obsolete
     irq_domain_add_linear() (Jiri Slaby)

  Cadence PCIe controller driver:

   - Add MODULE_DEVICE_TABLE to generate module aliases for OF-based
     module autoloading (Pengpeng Hou)

   - Add debugfs 'ltssm_status' file for LGA- and HPA-based Cadence
     controllers (Hans Zhang)

   - Support up to x4 (not x2) lanes for J200 (Takuma Fujiwara)

   - Fix host/endpoint dependencies for cadence-plat driver to fix link
     error when cadence-plat is built-in but the host or endpoint driver
     is modular (Aksh Garg)

  Freescale i.MX6 PCIe controller driver:

   - Add imx6 intr/aer/pme interrupt lines for i.MX95 (Richard Zhu)

   - Remove PERST# checking from pci_host_common_parse_port() so callers
     can decide whether to fall back to legacy DT binding with PERST# in
     the host bridge (Sherry Sun)

   - Fix build issues when PCI_PWRCTRL_GENERIC or PCI_HOST_COMMON is a
     module (Arnd Bergmann)

   - Create pwrctrl devices only once by doing it from imx_pcie_probe()
     instead of imx_pcie_host_init(), which is used during both probe
     and resume (Sherry Sun)

   - Use 'dw_pcie_rp->skip_pwrctrl_off' to avoid powering off devices
     during suspend to preserve wakeup capability (Sherry Sun)

   - Add runtime PM support for i.MX95 to allow dynamic power management
     when the link is idle (Richard Zhu)

  Intel VMD host bridge driver:

   - Support device ID 0x28C1 and assume that BIOS has already
     enumerated the hierarchy below VMD and stored bus range info for OS
     to use (Nirmal Patel)

   - Add support for VMCONFIG BUS_RESTRICT_CFG=3, which makes it
     possible to enumerate downstream devices on Intel Arrow Lake-HX
     systems and probably others (Ali Alaei)

   - Pay attention to _OSC negotiation for VMD hierarchy only when
     running on bare metal, not when running in a VM (Nirmal Patel)

   - Add Nova Lake (NVL) and Dunlow (DNL) Device IDs (Szymon Durawa)

  MediaTek PCIe controller driver:

   - Add support for PCIe controller in EcoNet EN7528 and EN751221 SoCs
     (Caleb James DeLisle)

  MediaTek PCIe Gen3 controller driver:

   - Add mediatek-gen3 'memory-region' for restricted DMA buffer
     (Chen-Yu Tsai)

  NVIDIA Tegra264 PCIe controller driver:

   - Distinguish Tegra264 C0 PCIe controller for internal GPU from C1-C5
     controllers so the unit address matches the first 'reg' entry
     (Thierry Reding)

   - Add Tegra264 Root Port stanzas to prepare for generic WAKE#
     handling (Thierry Reding)

  Qualcomm PCIe controller driver:

   - Add IPQ9650 compatible with global interrupt (Kathiravan
     Thirumoorthy)

   - Add IPQ5210 compatible with IPQ9574 fallback (Varadarajan
     Narayanan)

   - Add DT binding and driver support for Hawi SoC (Matthew Leung)

   - Skip PERST# GPIOs provided by downstream PCIe devices, which should
     be handled by drivers of those devices (Manivannan Sadhasivam)

   - Stop advertising Attention Button Present (no Qcom SoCs support
     Attention Buttons) so pciehp can use Presence Detect Changed events
     (Qiang Yu)

  Renesas R-Car PCIe controller driver:

   - Add rcar-gen4-pci-host optional 'msi-parent' for GIT ITS (Marek
     Vasut)

   - When MSI is enabled but iMSI-RX is not used, configure AXIINTC to
     allow GIT ITS to handle MSI (Marek Vasut)

   - Refactor GIC600 implementation to make it easier to add platforms
     that only support 32-bit addressing (Marek Vasut)

   - Add Renesas R-Car Gen4 S4/V4H/V4M to the list of GIC600
     integrations that only support 32-bit addressing (Marek Vasut)

  Renesas RZ/G3S PCIe controller driver:

   - Add DT binding and driver support for RZ/V2H(P) SoC, which contains
     two PCIe controllers, configured either as a single x4 link or two
     independent x2 link controllers (Lad Prabhakar)

  SpacemiT K1 PCIe controller driver:

   - Add missing MODULE_DEVICE_TABLE() to generate module alias info for
     OF-based module autoloading (Pengpeng Hou)

  StarFive PCIe controller driver:

   - Fix resource leaks on error paths in host_init() (Ali Tariq)

   - Fix runtime PM handling and teardown ordering to avoid register
     access while power or clocks are disabled (Ali Tariq)

   - Check for runtime PM resume failure to avoid register access while
     power or clocks are disabled (Ali Tariq)

  Synopsys DesignWare PCIe controller driver:

   - Add LECARC PMU IDs to the DWC RAS/DES VSEC list so it can take
     advantage of the existing debugfs support for silicon debug, error
     injection, and event counters (Brett Zhou)

   - Factor pcie_valid_speed() and pci_bus_speed2lnkctl2() out of bwctrl
     so they can be shared by the DWC core (Hans Zhang)

   - Flush MSI writes from endpoint before unmapping the iATU, as we
     already do for MSI-X writes (Niklas Cassel)

   - Unmap MSI iATU window before mapping MSI-X window, to avoid a
     subsequent MSI write using a disabled aperture and losing the
     interrupt (Niklas Cassel)

   - Change endpoint .pre_init() and .init() callbacks to return errors
     and handle them (Marek Vasut)

  UltraRISC PCIe controller driver:

   - Add 'core', 'dbi', and 'aux' clocks to DT binding and manage them
     in the driver (Jia Wang)

   - Use module_platform_driver() since this may be built as a module,
     though not removable because IRQs can't be safely disposed (Jia
     Wang)

  MicroSemi Switchtec management driver:

   - Add Microchip PCI1008 device ID and include it in NTB DMA alias
     quirk (Logan Gunthorpe)

  Miscellaneous:

   - Document how to write PCI Host Controller drivers (Manivannan
     Sadhasivam)

   - Fix typos in documentation (D'Orus Tsitera)

   - Use %pe format specifier to print error pointers so we get symbolic
     errname when available (Krzysztof Wilczyński)"

* tag 'pci-v7.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (124 commits)
  PCI: vmd: Add Nova Lake (NVL) and Dunlow (DNL) Device IDs
  PCI: tegra264: Add Tegra264 support
  dt-bindings: PCI: tegra264: Switch to PCIe Root Port bindings
  dt-bindings: PCI: tegra264: Strictly distinguish C0 from C1-C5
  PCI/AER: Support Advisory Non-Fatal Errors
  PCI: Fix 32-bit config write in Intel PCH Root Port MPC ACS quirk
  PCI: dwc: Handle return value from endpoint .pre_init callback
  PCI: dwc: Handle return value from endpoint .init callback
  PCI: dwc: Add PCI ID for LECARC PCIe PMU
  PCI/ASPM: Mask ASPM states based on Devicetree properties
  PCI/ASPM: Disable/restore ASPM on every function for multi-function devices
  Documentation: PCI: Document how to write PCI Host Controller drivers
  PCI/ASPM: Use pcie_capability_clear_and_set_word() for ASPM disable/restore
  PCI: Add support for PCIe WAKE# interrupt
  PCI: Allow D3 for native hotplug-capable Root Ports on non-x86 platforms
  dt-bindings: PCI: Correct white-space style
  PCI/ASPM: Avoid L0s for Realtek RTS525A
  PCI: ultrarisc: Use module_platform_driver()
  PCI: ultrarisc: Get and enable DP1000 PCIe controller clocks
  dt-bindings: PCI: ultrarisc: Add required DP1000 PCIe clocks
  ...
 2026-08-23 12:44:10 -07:00
Linus Torvalds
91ec203513 Networking changes for 7.3. 
Core & protocols
 ----------------
 
  - A few steps lowering rtnl_lock dependence:
    - per-netns netdev unregistration for select SW drivers
      (e.g. veth, ipvlan, tunnels)
    - rtnl_lock-less FIB rule changes (RTM_NEWRULE and RTM_DELRULE)
    - prepare software drivers and TC qdiscs for rtnl_lock-less GET
 
  - Support BIG TCP (>64kB TSO) in UDP tunnels (vxlan, geneve).
 
  - Support buffers larger than PAGE_SIZE in devmem zero-copy API.
 
  - Improve MPTCP handling of extreme memory pressure handling,
    when out-of-order queue had to be pruned.
 
  - Report the per-group user count via RTM_GETMULTICAST.
 
  - Expose the route deletion reason in RTM_DELROUTE.
 
  - Add a SO_RIGHTS_NOTRUNC option to UNIX sockets to enable more useful
    handling of LSM denials when receiving SCM_RIGHTS messages: instead
    of truncating the message at the first blocked fd, keep every fd slot
    and store the LSM errno in the blocked slot.
 
  - IPv6 Segment Routing - support looking up the post-encap SID
    (address) in a different/specified routing table.
 
  - Support PRP RedBox (interlink) creation.
 
  - Support per-nexthop UDP dst port in VXLAN.
 
  - Continue converting getsockopt callbacks in a number of protocols
    to iov_iter.
 
 Ethernet
 --------
 
  - Marge initial CXL support for AMD/Solarflare NICs (shared branch
    with the CXL tree).
 
  - New drivers:
    - ADIN1140 10BASE-T1S MACPHY
    - Initial skeleton of Intel iXD and ZTE Dinghai drivers.
 
  - High-speed NICs:
    - AMD/Pensando:
      - support firmware flashing
    - Cisco (enic):
      - SR-IOV V2 admin channel and MBOX protocol
    - Huawei (hns3):
      - support for ethtool pfc_prevention_tout
    - nVidia/Mellanox:
      - support sharing bandwidth control across interfaces of
        the same device
    - Marvell (octeontx2-pf):
      - link RQ page pools to netdev for Netlink stats
    - Google vNIC:
      - XDP metadata support for DQ RDA
    - Microsoft vNIC:
      - support forcing full-page RX buffers
 
  - Other NICs:
    - Synopsys IP:
      - eic7700: support for eth1
    - Microchip (lan743x):
      - support for RMII interface
    - Wangxun:
      - support for ethtool -G and -C for VFs
      - add Tx timeout and PCIe error handling
    - Intel (igb/igc):
      - RSS key get/set support
      - support for forcing link speed without auto-negotiation
 
  - Switches:
    - NXP (dpaa2):
      - support bonding/LAG offload
    - Mediatek:
      - mt7530: EN7528 support
      - initial support for MT7628
    - Micrel (ksz8/9):
      - refactoring work to move towards library model
      - PTP support for KSZ8463
    - nVidia/Mellanox:
      - support rtnl-lock-less ethtool callbacks
    - Realtek:
      - rtl8366rb: use generic RTL83xx code
      - support SGMII and HSGMII for RTL8367S
 
  - PHYs:
    - Airoha:
      - EcoNet EN7528 PHY support
    - DAPU Telecom
      - DAPU Telecom DAP8211R(I) Gigabit PHY support
    - Realtek:
      - support RTL8261C_CG
      - support RTL8261D
 
 Wireless
 --------
 
  - nl80211: per-link statistics support for multi-link operation
 
  - mac80211: AQL/airtime-fairness support for multicast
 
  - Merge Peripheral Authentication Service (PAS) / TEE support
    for ath12k (shared branch with the firmware/qcom tree).
 
  - New drivers:
    - mm81x for Morse Micro Long-Range S1G devices
    - nxpwifi for NXP devices (mostly forked off from mwifiex)
 
  - Driver changes:
    - Broadcom (brcmfmac):
      - DPP support, some Cypress part update
    - MediaTek (mt76):
      - mt7928 support
      - mt7925 NAN support
      - mt7996 AP powersave improvements
    - Qualcomm (ath12k):
      - much kernel infrastructure integration work
      - AHB platform MultiPD support
    - Realtek (rt89):
      - LED support
      - RTL8922DE support
      - dual-BT coex for RTL8922D
    - Intel:
      - new FW version support
 
 Bluetooth
 ---------
 
  - HCI: add support for Shorter Connection Interval (SCI) feature.
 
  - af_bluetooth: add minimal context analysis annotations.
 
  - Driver changes:
    - Intel:
      - add Bluetooth SAR revision 2 support
      - add vendor_reset PCI sysfs for PLDR
    - Mediatek:
      - add USB IDs for MT7902 and MT7922 devices
    - Realtek:
      - add USB IDs for 8761CU and 8852BE devices
    - NXP:
      - add M.2 Bluetooth device support using pwrseq
 
 Misc
 ----
 
  - DPLL support for manual/numerical oscillator control (NCO)
    (implement in zl3073x).
 
  - MCTP support for MCTP over USB v1.1 (DMTF DSP0283).
 
  - Power-over-Ethernet: support Realtek PSE controllers.
 
  - Remove the IBM EHEA driver.
 
  - Remove tulip/xircom_cb driver.
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-next-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "One of the 'small improvements all over the place' releases for us.

  It's hard to draw any direct comparisons because summer vacations
  disrupted our patch processing (and presumably - generation) quite a
  bit.

  Quick and dirty count suggests we (Paolo and I) merged a very similar
  number of net (632) and net-next (648) patches. This is not telling
  the full story either because 1/3 to 1/2 of the net-next patches also
  *seem* like AI-driven low priority fixes, cleanups and clarifications.

  We are completely overwhelmed, of course. The glimmer of hope is that
  we secured sufficient LLM budget and access (thank you Meta!) to run
  reviews with multiple frontier models on each patch. This eliminates
  some hallucinations. That said, in terms of review, the LLMs can only
  do so much.

  The sad truth is that our APIs (especially for rare events like PCIe
  errors, timeouts etc) have always been racy, and now LLMs don't let us
  ignore that. I expect our direction for the next release will be to
  tweak the reviews a little bit more, but start shifting focus to
  letting the LLMs take care of the busy work - managing patchwork,
  automating common process complaints, editing commit messages, and
  maybe applying patches which already got "reviewed-by" tags from
  people we trust...

  Core & protocols:

   - A few steps lowering rtnl_lock dependence:
      - per-netns netdev unregistration for select SW drivers (e.g.
        veth, ipvlan, tunnels)
      - rtnl_lock-less FIB rule changes (RTM_NEWRULE and RTM_DELRULE)
      - prepare software drivers and TC qdiscs for rtnl_lock-less GET

   - Support BIG TCP (>64kB TSO) in UDP tunnels (vxlan, geneve)

   - Support buffers larger than PAGE_SIZE in devmem zero-copy API

   - Improve MPTCP handling of extreme memory pressure handling, when
     out-of-order queue had to be pruned

   - Report the per-group user count via RTM_GETMULTICAST

   - Expose the route deletion reason in RTM_DELROUTE

   - Add a SO_RIGHTS_NOTRUNC option to UNIX sockets to enable more
     useful handling of LSM denials when receiving SCM_RIGHTS messages:
     instead of truncating the message at the first blocked fd, keep
     every fd slot and store the LSM errno in the blocked slot

   - IPv6 Segment Routing - support looking up the post-encap SID
     (address) in a different/specified routing table

   - Support PRP RedBox (interlink) creation

   - Support per-nexthop UDP dst port in VXLAN

   - Continue converting getsockopt callbacks in a number of protocols
     to iov_iter

  Ethernet:

   - Merge initial CXL support for AMD/Solarflare NICs (shared branch
     with the CXL tree)

   - New drivers:
      - ADIN1140 10BASE-T1S MACPHY
      - Initial skeleton of Intel iXD and ZTE Dinghai drivers

   - High-speed NICs:
      - AMD/Pensando:
         - support firmware flashing
      - Cisco (enic):
         - SR-IOV V2 admin channel and MBOX protocol
      - Huawei (hns3):
         - support for ethtool pfc_prevention_tout
      - nVidia/Mellanox:
         - support sharing bandwidth control across interfaces
           of the same device
      - Marvell (octeontx2-pf):
         - link RQ page pools to netdev for Netlink stats
      - Google vNIC:
         - XDP metadata support for DQ RDA
      - Microsoft vNIC:
         - support forcing full-page RX buffers

   - Other NICs:
      - Synopsys IP:
         - eic7700: support for eth1
      - Microchip (lan743x):
         - support for RMII interface
      - Wangxun:
         - support for ethtool -G and -C for VFs
         - add Tx timeout and PCIe error handling
      - Intel (igb/igc):
         - RSS key get/set support
         - support for forcing link speed without auto-negotiation

   - Switches:
      - NXP (dpaa2):
         - support bonding/LAG offload
      - Mediatek:
         - mt7530: EN7528 support
         - initial support for MT7628
      - Micrel (ksz8/9):
         - refactoring work to move towards library model
         - PTP support for KSZ8463
      - nVidia/Mellanox:
         - support rtnl-lock-less ethtool callbacks
      - Realtek:
         - rtl8366rb: use generic RTL83xx code
         - support SGMII and HSGMII for RTL8367S

   - PHYs:
      - Airoha:
         - EcoNet EN7528 PHY support
      - DAPU Telecom
         - DAPU Telecom DAP8211R(I) Gigabit PHY support
      - Realtek:
         - support RTL8261C_CG
         - support RTL8261D

  Wireless:

   - nl80211: per-link statistics support for multi-link operation

   - mac80211: AQL/airtime-fairness support for multicast

   - Merge Peripheral Authentication Service (PAS) / TEE support for
     ath12k (shared branch with the firmware/qcom tree)

   - New drivers:
      - mm81x for Morse Micro Long-Range S1G devices
      - nxpwifi for NXP devices (mostly forked off from mwifiex)

   - Driver changes:
      - Broadcom (brcmfmac):
         - DPP support, some Cypress part update
      - MediaTek (mt76):
         - mt7928 support
         - mt7925 NAN support
         - mt7996 AP powersave improvements
      - Qualcomm (ath12k):
         - much kernel infrastructure integration work
         - AHB platform MultiPD support
      - Realtek (rt89):
         - LED support
         - RTL8922DE support
         - dual-BT coex for RTL8922D
      - Intel:
         - new FW version support

  Bluetooth:

   - HCI: add support for Shorter Connection Interval (SCI) feature

   - af_bluetooth: add minimal context analysis annotations

   - Driver changes:
      - Intel:
         - add Bluetooth SAR revision 2 support
         - add vendor_reset PCI sysfs for PLDR
      - Mediatek:
         - add USB IDs for MT7902 and MT7922 devices
      - Realtek:
         - add USB IDs for 8761CU and 8852BE devices
      - NXP:
         - add M.2 Bluetooth device support using pwrseq

  Misc:

   - DPLL support for manual/numerical oscillator control (NCO)
     (implement in zl3073x)

   - MCTP support for MCTP over USB v1.1 (DMTF DSP0283)

   - Power-over-Ethernet: support Realtek PSE controllers

   - Remove the IBM EHEA driver

   - Remove tulip/xircom_cb driver"

* tag 'net-next-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1433 commits)
  net/mlx5e: do not HW-GRO coalesce small frames
  net: openvswitch: fix nf_connlabels leak in ovs_ct_init
  net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs()
  net: openvswitch: fix flow mask use-after-free on flow deletion
  sctp: stop processing a packet once its association is deleted
  dpll: zl3073x: add PTP clock support
  dpll: zl3073x: add channel ToD, phase step and TIE operations
  dpll: zl3073x: scale poll interval proportionally to timeout
  ptp: vmclock: prevent read-only mappings from becoming writable
  ipv4: reject undersized MTUs in ip_do_fragment()
  bonding: initialize err for empty target lists
  net: dsa: initial support for MT7628 embedded switch
  net: dsa: initial MT7628 tagging driver
  net: phy: mediatek: add phy driver for MT7628 built-in Fast Ethernet PHYs
  dt-bindings: net: dsa: add MT7628 ESW
  net: pse-pd: realtek-pse-mcu: add UART transport
  net: pse-pd: realtek-pse-mcu: add I2C transport
  net: pse-pd: add Realtek PSE MCU core
  dt-bindings: net: pse-pd: add bindings for Realtek PSE MCU
  vsock: use sock_error() to consume sk_err after a failed connect
  ...
 2026-08-20 08:16:04 -07:00
Linus Torvalds
ca58a3dde6 alpha updates for v7.3 
- alpha: read $gp and $sp explicitly for clang
 - alpha: pass -Wa,-mev6 only when using GNU as
 - alpha: annotate hardirqs-off on IPL 7 interrupt entry
 - alpha: run the remote RTC access in a worker, not an IPI callback
 - alpha: don't leak hardware-fabricated FP exception bits to user space
 - alpha: fix ieee_swcr_to_fpcr setting FPCR_DNOD unconditionally
 - alpha: enable lockdep hardirq state tracking
 - alpha: use raw spinlocks for low-level platform locks
 - alpha: provide ftrace return address support for lockdep
 - alpha: make irqflags helpers operate on IPL state
 - alpha: add ARCH_STACKWALK-based stacktrace support
 - alpha: enable regset-based ptrace and core dumps
 - alpha: marvel: Fix lock ordering in init_io7_irqs()
 - alpha: marvel: Fix irq_set_status_flags to use correct IRQ number
 - alpha: remove unnecessary architecture-specific <asm/device.h>
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Merge tag 'alpha-for-v7.3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/lindholm/alpha

Pull alpha updates from Magnus Lindholm:
 "This contains two fixes for Alpha floating-point exception handling,
  two clang-related fixes, the preparatory changes from the
  generic-entry series, an interrupt-entry lockdep fix, two Marvel/EV7
  IRQ fixes, an RTC fix, and one header cleanup.

  The generic-entry preparation adds regset-based ptrace and core dumps,
  ARCH_STACKWALK and lockdep hardirq-state tracking. These changes are
  useful independently and enable previously missing debugging
  facilities on Alpha.

  The final patch switching Alpha to GENERIC_ENTRY is intentionally not
  included in this pull request. I am deferring that change to allow
  further testing and to reduce the risk of conflicts with ongoing
  entry-path work elsewhere in the kernel"

* tag 'alpha-for-v7.3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/lindholm/alpha:
  alpha: read $gp and $sp explicitly for clang
  alpha: pass -Wa,-mev6 only when using GNU as
  alpha: annotate hardirqs-off on IPL 7 interrupt entry
  alpha: run the remote RTC access in a worker, not an IPI callback
  alpha: don't leak hardware-fabricated FP exception bits to user space
  alpha: fix ieee_swcr_to_fpcr setting FPCR_DNOD unconditionally
  alpha: enable lockdep hardirq state tracking
  alpha: use raw spinlocks for low-level platform locks
  alpha: provide ftrace return address support for lockdep
  alpha: make irqflags helpers operate on IPL state
  alpha: add ARCH_STACKWALK-based stacktrace support
  alpha: enable regset-based ptrace and core dumps
  alpha: marvel: Fix lock ordering in init_io7_irqs()
  alpha: marvel: Fix irq_set_status_flags to use correct IRQ number
  alpha: remove unnecessary architecture-specific <asm/device.h>
 2026-08-18 19:33:32 -07:00
Linus Torvalds
030c9f813b Treewide timer related cleanups: 
- Remove the leftover CLOCK_TICK_RATE which has been scheduled for
     removal more than a decade ago along with some now empty asm/timex.h
     files.
 
   - Consolidate delay timer calibration
 
     The construct of having a define in a header requires that
     architectures provided asm/timex.h for no reason. Also the function
     name for reading the delay timer is confusing at best.
 
     Use a config switch to enable that functionality and rename the
     function to delay_read_timer() to make the purpose clear.
 
     This removes some more now empty asm/timex.h files as well.
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Merge tag 'timers-cleanups-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull treewide timer related cleanups from Thomas Gleixner:

 - Remove the leftover CLOCK_TICK_RATE which has been scheduled for
   removal more than a decade ago along with some now empty asm/timex.h
   files.

 - Consolidate delay timer calibration

   The construct of having a define in a header requires that
   architectures provided asm/timex.h for no reason. Also the function
   name for reading the delay timer is confusing at best.

   Use a config switch to enable that functionality and rename the
   function to delay_read_timer() to make the purpose clear.

   This removes some more now empty asm/timex.h files as well.

* tag 'timers-cleanups-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  calibrate: Rework delay timer calibration
  treewide: Remove CLOCK_TICK_RATE
  x86: Use PIT_TICK_RATE instead of CLOCK_TICK_RATE
 2026-08-18 15:58:29 -07:00
Linus Torvalds
3424d8c18a Generic entry code updates: 
- Make syscall user dispatching configurable
 
     Not all architectures can makes use of syscall user dispatching. Allow
     them to disable the feature completely.
 
   - Consolidate stack randomization for the generic entry code and the
     architectures using it.
 
     Stack randomization on syscall entry was sprinkled throughout the
     architecture specific low level entry code and in some cases at the
     wrong points, e.g. before establishing state, which violates the
     non-instrumentable constraints of that code.
 
     Clean this up by integrating stack randomization into the generic entry
     code helpers so that it is invoked at the earliest possible point right
     after establishing state and converting all generic entry code using
     architecture over.
 
   - Clean up the syscall number handling in the generic entry code. It
     works correctly for architectures which have a separate return value
     storage in pt_regs, but fails to distinguish the case where user space
     handed in -1 as syscall number from the case where the entry code
     rejects it by returning -1 to the callers. Aside of that the return
     value functionality of those interfaces is not really intuitive.
 
     Fix this by separating the decision to reject a syscall (user dispatch,
     ptrace, seccomp ...) from the potential modification of the syscall
     number through these mechanisms.
 
     This solves most of the problems for architectures which do not have a
     separate return value storage in pt_regs except for the case where a
     tracepoint has a BPF script or a probe attached which overwrite both
     the syscall number and the return value. But that's a problem which
     cannot be solved in the generic code, that only can be addressed by
     separating the storage model in the affected architectures.
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Merge tag 'core-entry-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull generic entry code updates from Thomas Gleixner:

 - Make syscall user dispatching configurable

   Not all architectures can makes use of syscall user dispatching.
   Allow them to disable the feature completely.

 - Consolidate stack randomization for the generic entry code and the
   architectures using it.

   Stack randomization on syscall entry was sprinkled throughout the
   architecture specific low level entry code and in some cases at the
   wrong points, e.g. before establishing state, which violates the
   non-instrumentable constraints of that code.

   Clean this up by integrating stack randomization into the generic
   entry code helpers so that it is invoked at the earliest possible
   point right after establishing state and converting all generic entry
   code using architecture over.

 - Clean up the syscall number handling in the generic entry code. It
   works correctly for architectures which have a separate return value
   storage in pt_regs, but fails to distinguish the case where user
   space handed in -1 as syscall number from the case where the entry
   code rejects it by returning -1 to the callers. Aside of that the
   return value functionality of those interfaces is not really
   intuitive.

   Fix this by separating the decision to reject a syscall (user
   dispatch, ptrace, seccomp ...) from the potential modification of the
   syscall number through these mechanisms.

   This solves most of the problems for architectures which do not have
   a separate return value storage in pt_regs except for the case where
   a tracepoint has a BPF script or a probe attached which overwrite
   both the syscall number and the return value. But that's a problem
   which cannot be solved in the generic code, that only can be
   addressed by separating the storage model in the affected
   architectures.

* tag 'core-entry-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  entry, treewide: Make syscall_enter_from_user_mode[_work]() indicate syscall execution
  entry: Make return type of syscall_trace_enter() bool
  entry: Rework trace_syscall_enter()
  entry: Rework syscall_audit_enter()
  syscall_user_dispatch: Introduce ARCH_SUPPORTS_SYSCALL_USER_DISPATCH
  entry: Fix seccomp bypass after ptrace with TSYNC
  x86/entry: Simplify the syscall number logic
  x86/entry: Get rid of the sys_ni_syscall() indirection
  x86/entry: Make syscall functions static
  ptrace, treewide: Rename ptrace_report_syscall_entry() to ptrace_report_syscall_permit_entry()
  seccomp, treewide: Rename and convert __secure_computing() to return boolean
  entry: Use syscall number instead of rereading it
  entry: Remove syscall_enter_from_user_mode()
  x86/syscall: Use [syscall_]enter_from_user_mode_randomize_stack()
  s390/syscall: Use enter_from_user_mode_randomize_stack()
  riscv/syscall: Use syscall_enter_from_user_mode_randomize_stack()
  powerpc/syscall: Use syscall_enter_from_user_mode_randomize_stack()
  loongarch/syscall: Use syscall_enter_from_user_mode_randomize_stack()
  entry: Provide [syscall_]enter_from_user_mode_randomize_stack()
  randomize_kstack: Provide add_random_kstack_offset_irqsoff()
  ...
 2026-08-18 15:00:56 -07:00
Jori Koolstra
fd8756fa14 net: af_unix: useful handling of LSM denials on SCM_RIGHTS 
Right now if some LSM such as Smack denies an AF_UNIX socket peer to
receive an SCM_RIGHTS fd, the SCM_RIGHTS fd array will be cut short at
that point, and MSG_CTRUNC is set on return of recvmsg(). This is
highly problematic behaviour, because it leaves the receiver
wondering what happened. As per man page MSG_CTRUNC is supposed to
indicate that the control buffer was sized too short, but suddenly
a permission error might result in the exact same flag being set.
Moreover, the receiver has no chance to determine how many fds got
originally sent and how many were suppressed.[1]

Add a SO_RIGHTS_NOTRUNC option to UNIX sockets to enable more useful
handling of LSM denials when receiving SCM_RIGHTS messages: instead of
truncating the message at the first blocked fd, keep every fd slot
and store the LSM errno in the blocked slot. The socket option is
inherited by the child accept() socket if set on the listen() socket.

[1]: https://github.com/uapi-group/kernel-features#useful-handling-of-lsm-denials-on-scm_rights

Reviewed-by: Christian Brauner (Amutable) <brauner@kernel.org>
Signed-off-by: Jori Koolstra <jkoolstra@xs4all.nl>
Link: https://patch.msgid.link/20260813162818.149248-4-jkoolstra@xs4all.nl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-08-17 18:14:52 -07:00
Matt Turner
b39c748d9d alpha: read $gp and $sp explicitly for clang 
clang honors a local `register unsigned long x __asm__("$N")` variable
only where it appears as an inline-asm operand; merely reading it does
not produce the contents of that register.  So trap_init() passed an
undefined global pointer to PAL_wrkgp, and load_PCB() stored an undefined
stack pointer into the PCB that swpctx then loaded.  Either one wedges an
early boot.

Read the registers explicitly instead: an inline mov for $gp in
trap_init(), and the file-scope current_stack_pointer for $sp in
load_PCB().  A file-scope register-asm variable is the form clang does
support.

Signed-off-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Maciej W. Rozycki <macro@orcam.me.uk>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260803-alpha-clang-v1-2-1c4ba5ba7a64@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-08-16 16:00:00 +02:00
Matt Turner
89679d7908 alpha: pass -Wa,-mev6 only when using GNU as 
That flag exists to stop gas emulating instructions the assembler thinks
the target lacks.  It is a gas-only option, and LLVM's integrated
assembler does not emulate instructions in the first place, so nothing
is needed there.

Condition it on CONFIG_AS_IS_GNU rather than the compiler, so it is
still passed for clang builds using GNU as (LLVM_IAS=0) and omitted only
for the integrated assembler.

Signed-off-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260805185557.3283233-1-mattst88@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-08-11 23:29:28 +02:00
Matt Turner
f32977deb1 alpha: annotate hardirqs-off on IPL 7 interrupt entry 
do_entInt() opens with local_irq_disable(), which with
CONFIG_TRACE_IRQFLAGS only calls trace_hardirqs_off() if interrupts were
not already off:

	#define local_irq_disable()				\
		do {						\
			bool was_disabled = raw_irqs_disabled();\
			raw_local_irq_disable();		\
			if (!was_disabled)			\
				trace_hardirqs_off();		\
		} while (0)

On alpha raw_irqs_disabled() is (rdps() & 7) == IPL_MAX, i.e. IPL 7.
PALcode raises PS.IPL to the level of the interrupt before entInt runs,
so for an IPL 7 entry - a processor machine check (vector 0x660) or a
system event (vector 0x680), both IPL_MCHECK == IPL_MAX - the gate is
already true and the annotation is skipped.  lockdep keeps whatever
hardirq state the interrupted context had.  If that context had
interrupts enabled, lockdep believes they are still enabled for the
duration of the handler, and every lockdep_assert_irqs_disabled() in the
interrupt path fires:

  WARNING: kernel/context_tracking.c:346 at ct_irq_enter+0xc4/0xd0, CPU#0: swapper/0/0
  [...]
  [<fffffc0001ef74d4>] ct_irq_enter+0xc4/0xd0
  [<fffffc000105ebd0>] irq_enter+0x20/0x50
  [<fffffc000103707c>] do_entInt+0x1dc/0x2e0
  [<fffffc0001031d60>] ret_from_exception+0x0/0x10

  irq event stamp: 735356346
  hardirqs last  enabled at (735356346): trace_hardirqs_on+0x68/0x220
  hardirqs last disabled at (735356345): do_idle+0xf0/0x270

The stamps show the problem directly: the most recent event is the
enable from the interrupted idle loop, and do_entInt() recorded no
disable at all.  ct_irq_exit() warns the same way on the way out.

Ordinary device interrupts arrive at IPL 3-5 and IPIs and performance
counter interrupts at IPL 6, so was_disabled is false for them and the
annotation happens normally.  Only the two IPL 7 vectors are affected,
which is why this needs an environmental event to show up.

Take the hardware IPL out of the decision and drive the annotation from
lockdep's own state instead.

This corrects the annotation only.  An IPL 7 event can also interrupt a
region that has legitimately disabled interrupts, where irq_enter() and
irq_exit() are not the right primitives and NMI semantics are needed;
that is a larger change and is left alone here.

Tested on an AlphaServer ES47 (Marvel/EV7) by injecting system events
through the system management path: fifteen injections, idle and under
load, with no splat.  The same injection on a freshly booted kernel
without this change reproduces both warnings.

Signed-off-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260810202835.3592833-2-mattst88@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-08-11 23:23:48 +02:00
Matt Turner
6f45effbd7 alpha: run the remote RTC access in a worker, not an IPI callback 
On Marvel the CMOS clock is only reachable from the boot cpu, so
remote_read_time() and remote_set_time() bounce the access there with
smp_call_function_single(), whose callback runs in hard interrupt
context.

alpha_rtc_read_time() calls mc146818_get_time() with a 10 ms timeout.
That waits out the RTC update cycle in mc146818_avoid_UIP(), which drops
rtc_lock and udelay()s 100 us at a time until the update completes or
the timeout expires:

	for (i = 0; UIP_RECHECK_LOOPS_MS(i) < timeout; i++) {
		spin_lock_irqsave(&rtc_lock, flags);
		...
		if (CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP) {
			spin_unlock_irqrestore(&rtc_lock, flags);
			udelay(UIP_RECHECK_DELAY);
			continue;
		}

So a clock read from a non-boot cpu can spin for up to 10 ms in hard
interrupt context on the boot cpu, while the cpu that sent the request
spins in smp_call_function_single() waiting for it to finish.

mc146818_set_time() does not poll, but it takes rtc_lock too, and
rtc_lock is a spinlock_t.  Only raw spinlocks may be taken in hard
interrupt context, so lockdep reports the write path as soon as a
non-boot cpu sets the clock:

  [ BUG: Invalid wait context ]
  -----------------------------
  swapper/0/0 is trying to lock:
  fffffc0003690470 (rtc_lock){....}-{3:3}, at: mc146818_set_time+0x74/0x450
  other info that might help us debug this:
  context-{2:2}
  no locks held by swapper/0/0.
  stack backtrace:
  CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 7.2.0-rc1 #1 NONE
  Trace:
  [<fffffc000102ebb0>] dump_stack+0x28/0x44
  [<fffffc000110efcc>] __lock_acquire+0xb0c/0x1060
  [<fffffc000110f5f0>] lock_acquire.part.0+0xd0/0x300
  [...]
  [<fffffc0001b0d834>] mc146818_set_time+0x74/0x450
  [<fffffc0001f090cc>] _raw_spin_lock_irqsave+0x7c/0xc0
  [<fffffc0001042f90>] do_remote_set+0x90/0xc0
  [<fffffc000119c1a4>] __flush_smp_call_function_queue+0x314/0x5c0
  [<fffffc000119c474>] generic_smp_call_function_single_interrupt+0x24/0x40
  [<fffffc000103d984>] handle_ipi+0xa4/0x230
  [<fffffc0001037044>] do_entInt+0x1a4/0x2e0

The rtc class ops are always called from process context, so there is no
reason to run the access from an interrupt at all.  Use work_on_cpu() to
run it in a worker on the boot cpu.  Alpha does not support cpu hotplug,
so the boot cpu cannot go offline while the work is pending.

Tested on an AlphaServer ES47 (Marvel/EV7): hwclock read and write
pinned to a non-boot cpu, twenty times, with no splat.

Signed-off-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260810202835.3592833-1-mattst88@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-08-11 23:23:47 +02:00
Matt Turner
bcfe318741 alpha: don't leak hardware-fabricated FP exception bits to user space 
On EV6 and later the hardware records exception status bits in the FPCR
before delivering a software completion trap, and those bits can be wrong
for the instruction that trapped.  Converting a double that is exactly
representable as a subnormal float sets FPCR_UNF even though the result
is exact, and an underflow trap additionally sets FPCR_INE even when the
emulated operation turns out to be exact.

alpha_fp_emul() only wrote the FPCR when soft-fp raised an exception, so
whenever it determined that the instruction was exact the fabricated bits
stayed in the FPCR and were reported to user space by fetestexcept().

Pass the exception summary register down from do_entArith() so the
handler can tell which exceptions the hardware attributed to the trapping
instruction, and always write the FPCR.  Clear the exceptions that the
trap reported but that soft-fp did not raise.  EXC_SUM reports only the
underflow or overflow when the hardware also set INE, so treat INE as a
candidate in that case, and treat a trap with no reported exception as a
denormal operand trap, for which the hardware can fabricate INE and UNF
as well.  Bits that software has already confirmed in ieee_state belong
to this or an earlier instruction and are never cleared.

The imprecise path passes no summary.  There the trap was taken somewhere
in the trap shadow, so EXC_SUM is not attribution for the instruction
being re-executed -- and only EV6, which traps precisely and so never
takes that path, has fabricated bits to clear.  For the same reason the
clearing is guarded by implver(), matching swcr_update_status().

On an UP1500 (EV68) this takes the glibc math testsuite from 831 failures
to 28, the remainder being unrelated to exception status.

This belongs with the preceding fix to ieee_swcr_to_fpcr(), and should
not be backported without it -- nor it without this.  That fix stops
FPCR_DNOD being set unconditionally, so denormal operand traps start
firing again.  Those traps very often find an exact result, which is
precisely the case where the old code left the FPCR unwritten and the
fabricated bits visible.  Applied alone it would make spurious exception
flags more common, not less.

One case cannot be resolved here: an inexact instruction without the
software completion suffix never traps, so its INE reaches the FPCR
without being recorded anywhere else.  Such a bit is indistinguishable
from an INE the hardware fabricated for a trapping instruction, and is
lost if an underflow or overflow trap with an exact result follows it.
The FPCR is the only record of those instructions and it carries no
attribution.

The bug predates the git history, so there is no commit to reference in a
Fixes tag.

Cc: stable@vger.kernel.org # 5.15+
Signed-off-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260803-alpha-fp-exceptions-v1-2-c99d75608e60@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-08-11 23:07:54 +02:00
Matt Turner
49672d026c alpha: fix ieee_swcr_to_fpcr setting FPCR_DNOD unconditionally 
ieee_swcr_to_fpcr() converts the software IEEE trap-enable and status
bits kept in thread_info.ieee_state into the hardware FPCR format.  It
contained:

	fp |= (~sw & IEEE_TRAP_ENABLE_DNO) << 41;

FPCR_DNOD (bit 47) disables denormal operand traps: with it set the
hardware handles a denormal operand itself, treating it as zero, instead
of trapping for software completion.  The intent was to set DNOD when the
user has not asked for SIGFPE on denormal operands, but
IEEE_TRAP_ENABLE_DNO is clear by default, so ieee_swcr_to_fpcr(0) always
set DNOD.

Instructions built with the software completion suffix therefore never
trapped on a denormal operand.  The hardware silently substituted zero
and produced wrong results, affecting every program compiled with -mieee
and default FPU settings, glibc included.

Set FPCR_DNOD only when IEEE_MAP_DMZ is requested, which is exactly the
case where flushing denormal inputs to zero is what the user asked for.
DNOD then encodes MAP_DMZ, which ieee_fpcr_to_swcr() already recovers
from FPCR_DNZ, so drop its attempt to recover IEEE_TRAP_ENABLE_DNO from
DNOD; the DNO trap enable lives solely in ieee_state.

Both functions are in a uapi header, so the encoding change is visible to
userspace, but nothing outside the kernel is known to depend on DNOD
carrying the DNO trap enable, and the kernel is the only writer of the
FPCR.

This must not be backported on its own.  Re-enabling denormal operand
traps exposes a second bug, fixed in the following patch: those traps
usually find an exact result, and for an exact result the emulator did
not write the FPCR back, leaving hardware-fabricated exception bits
visible to user space.  Taken alone this change would make spurious
exception flags more common.

The bug predates the git history, so there is no commit to reference in a
Fixes tag.

Cc: stable@vger.kernel.org # 5.15+
Signed-off-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260803-alpha-fp-exceptions-v1-1-c99d75608e60@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-08-11 23:07:54 +02:00
Krzysztof Wilczyński
ee2ca84457 alpha/PCI: Make the suffix the first __pci_dev_resource_attr() parameter 
Currently, the __pci_dev_resource_attr() helper macro takes the attribute
name suffix as its third parameter, even though the suffix is what
distinguishes the three attribute variants built on top of it.

Additionally, the pci_dev_resource_attr() wrapper passes an empty suffix,
and with the suffix placed in the middle of the parameter list its
invocation contains two consecutive commas, which checkpatch.pl highlights,
as follows:

  ERROR: space required after that ',' (ctx:VxO)

Move the suffix to the front so that the variant selector comes first and
the empty argument follows the opening parenthesis, which checkpatch.pl
does not complain about.  This also matches the parameter order used by the
PCI legacy I/O and memory attribute macros introduced in a subsequent
change.

No functional changes intended.

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260721020427.1541197-3-kwilczynski@kernel.org
 2026-08-04 17:09:21 -05:00
Christian Brauner
79d27fd718
arch: hookup fchroot() system call 
Wire up the fchroot() system call as number 472 on (nearly) all
architectures and sync the mirrored copies of the syscall tables and
the asm-generic unistd.h under tools/.

Link: https://patch.msgid.link/20260724-work-failfs-v2-5-485dabbae185@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
 2026-07-27 17:18:00 +02:00
Magnus Lindholm
d1ee975398 alpha: enable lockdep hardirq state tracking 
Alpha masks interrupts through the PAL IPL state, so lockdep cannot infer
hardirq state transitions from generic code alone. Add explicit
hardirq on/off annotations to the low-level entry and return paths so
lockdep's IRQ state follows the hardware IPL state.

Annotate the PAL IPL transitions and the shared return-to-user/kernel
paths where interrupts become enabled or disabled.  With the preceding
irqflags, raw-lock, sysfs, and ftrace return-address preparations in
place, select LOCKDEP_SUPPORT and TRACE_IRQFLAGS_SUPPORT for Alpha.

This keeps CONFIG_PROVE_LOCKING usable on Alpha instead of disabling
debug_locks due to IRQ-state mismatches.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Tested-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260706170019.2941459-7-linmag7@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-07-19 13:16:26 +02:00
Magnus Lindholm
3e4c9102e0 alpha: use raw spinlocks for low-level platform locks 
Some Alpha platform locks are used as low-level hardware serialization
locks in interrupt-controller and chipset access paths. These paths can
run while IRQ state is being changed or while lockdep is tracking that
state, so regular spinlock instrumentation is not appropriate once
lockdep is enabled.

Convert the affected Tsunami and Rawhide platform locks to
raw_spinlock_t. This keeps the locks as simple hardware serialization
locks and avoids lockdep recursion or IRQ-state mismatches when
CONFIG_PROVE_LOCKING is enabled.

This is a preparatory change for enabling lockdep hardirq state tracking
on Alpha.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Tested-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260706170019.2941459-6-linmag7@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-07-19 13:16:15 +02:00
Magnus Lindholm
cfdf5b879d alpha: provide ftrace return address support for lockdep 
Lockdep uses ftrace_return_address() to report useful call sites for
lock acquisition and IRQ-state tracking diagnostics. Provide the Alpha
architecture hook using the compiler return-address builtin when frame
pointers are available.

Return zero when frame pointers are disabled, matching the existing
fallback behavior of architectures that cannot provide a reliable return
address.

This is a preparatory change for enabling lockdep support on Alpha.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Tested-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260706170019.2941459-5-linmag7@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-07-19 13:16:03 +02:00
Magnus Lindholm
05dc12d664 alpha: make irqflags helpers operate on IPL state 
Alpha interrupt masking is controlled by the PAL IPL value, not by the
full processor status word.  Make arch_local_save_flags() return the
current IPL directly, and make arch_local_irq_restore() and
arch_irqs_disabled_flags() treat their argument as IPL state.

Mask the low IPL bits in the restore and test helpers so callers which
still pass a saved PS value continue to behave as expected.

This prepares the irqflags helpers for lockdep IRQ-state tracking, where
the saved flags value is used to determine whether hard IRQs are enabled
or disabled.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Tested-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260706170019.2941459-4-linmag7@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-07-19 13:15:55 +02:00
Magnus Lindholm
46651c650f alpha: add ARCH_STACKWALK-based stacktrace support 
Implement arch_stack_walk() for Alpha using a simple kernel
stack scanning walker. Start from regs+1 for current tasks
to skip pt_regs and use pcb.ksp for blocked tasks. Filter
candidates with __kernel_text_address() and stop at stack
bounds via kstack_end().

Enable CONFIG_STACKTRACE_SUPPORT and CONFIG_ARCH_STACKWALK
so generic stacktrace users (dump_stack(), /proc/*/stack,
SysRq backtraces, etc.) work on Alpha.

This provides functional in-kernel stack traces without
requiring frame pointer unwinding.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Tested-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260706170019.2941459-3-linmag7@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-07-19 13:15:54 +02:00
Magnus Lindholm
8a2857bc2b alpha: enable regset-based ptrace and core dumps 
Add a user_regset_view for Alpha and switch ELF core dumping to
CORE_DUMP_USE_REGSET.  General-purpose registers are exported in
ELF gregs layout, including callee-saved registers and a correct
user stack pointer.

The user stack pointer is not preserved in pt_regs on Alpha, so expose
it from the PCB, or via rdusp() for the current task, when building the
ELF register image.  This makes the user stack pointer consistent for
core dumps, ptrace regsets, and PTRACE_GET_SYSCALL_INFO.

Implement regset get/set callbacks for both NT_PRSTATUS and NT_PRFPREG.
The callbacks translate between Alpha's pt_regs/thread state and the
ELF-visible register layouts, while the common ptrace regset code handles
PTRACE_GETREGSET and PTRACE_SETREGSET iovec semantics.  This avoids
duplicating subtle short-buffer and oversized-buffer behavior in
arch_ptrace().

With these changes Alpha satisfies the requirements for
HAVE_ARCH_TRACEHOOK and selects it, enabling generic tracehook and
ptrace syscall-info code paths without changing the existing syscall
entry ABI.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Tested-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260706170019.2941459-2-linmag7@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-07-19 13:15:40 +02:00
Thomas Gleixner
3ed403bbc9 treewide: Remove CLOCK_TICK_RATE 
This has been scheduled for removal more than a decade ago and the comments
related to it have been dutifully ignored. The last dependencies are gone.

Remove it along with various now empty asm/timex.h files.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Link: https://patch.msgid.link/20260410120317.910770161@kernel.org
 2026-07-15 15:04:55 +02:00
Thomas Gleixner
622f04e974 ptrace, treewide: Rename ptrace_report_syscall_entry() to ptrace_report_syscall_permit_entry() 
The return value of that function is boolean and tells the caller whether
to permit the syscall processing or not.

Rename the function so the purpose is clear and make the return type bool.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Radu Rendec <radu@rendec.net>
Reviewed-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://patch.msgid.link/20260707190254.280015701@kernel.org
 2026-07-12 12:38:02 +02:00
Jinjie Ruan
7ba2ba7471 seccomp, treewide: Rename and convert __secure_computing() to return boolean 
The return value of __secure_computing() currently uses 0 to indicate
that a system call should be allowed, and -1 to indicate that it should
be blocked/killed. This 0/-1 pattern is non-intuitive for a security
check function and makes the control flow at the call sites less readable.

Furthermore, any potential future changes to these return values would
require a high-risk, error-prone audit of all its users across different
architectures.

Sanitize this logic by converting the return type of __secure_computing()
to a proper boolean, where 'true' explicitly means 'allow' and 'false'
means 'fail/deny'.

Update all the two dozen or so call sites across the tree to align with
this new boolean semantic. No functional changes are intended, as the
callers still return -1 to the lower-level assembly entry code upon
seccomp denial.

Rename the function to __seccomp_permit_syscall() so that the purpose is
entirely clear.

[ tglx: Rename the function ]

Suggested-by: Thomas Gleixner <tglx@kernel.org>
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Reviewed-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Link: https://patch.msgid.link/20260707190254.230735780@kernel.org
 2026-07-12 12:38:02 +02:00
Krzysztof Wilczyński
651fb94aaf alpha/PCI: Fix I/O port accessor argument order in pci_legacy_write() 
pci_legacy_write() in arch/alpha/kernel/pci-sysfs.c passes its arguments to
outb(), outw() and outl() in the wrong order:

  outb(port, val);

The Alpha I/O accessors in arch/alpha/include/asm/io.h take the value first
and the port second:

  extern void outb(u8 b, unsigned long port);

So the port number is written as data to the I/O address taken from the
user-supplied value, and the intended write to the requested port never
happens.

The arguments have been reversed since the file was added, and the function
returns the access size regardless, so the caller sees success while the
requested port is left untouched.

Fixes: 10a0ef39fb ("PCI/alpha: pci sysfs resources")
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260706175423.98305-1-kwilczynski@kernel.org
 2026-07-10 15:31:06 -05:00
Matt Turner
24d68db713 alpha: marvel: Fix lock ordering in init_io7_irqs() 
Move irq_set_chip_and_handler() and irq_set_status_flags() calls
outside the io7->irq_lock raw spinlock.  These functions take
sparse_irq_lock, which is a mutex, and taking a sleeping lock while
holding a raw spinlock is invalid.  The raw spinlock only needs to
protect the hardware CSR accesses.

This fixes the following lockdep splat during boot:

  [ BUG: Invalid wait context ]
  swapper/0/0 is trying to lock:
  sparse_irq_lock{....}-{4:4}, at: irq_mark_irq
  other info that might help us debug this:
  context-{5:5}
  1 lock held by swapper/0/0:
   #0: &io7->irq_lock{....}-{2:2}, at: init_io7_irqs.constprop.0

Cc: stable@vger.kernel.org
Assisted-by: Claude:claude-opus-4-6
Signed-off-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260528230516.1839694-2-mattst88@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-07-06 22:59:19 +02:00
Matt Turner
3a3ac1f6c6 alpha: marvel: Fix irq_set_status_flags to use correct IRQ number 
Pass base + i to irq_set_status_flags() to match the IRQ number
used in irq_set_chip_and_handler(). Previously, IRQ_LEVEL was set
on the wrong (low-numbered) IRQ descriptors rather than the IO7
IRQs at base + i.

Cc: stable@vger.kernel.org
Fixes: 08876fe851 ("alpha: marvel: Convert irq_chip functions")
Signed-off-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260528230516.1839694-1-mattst88@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-07-06 22:59:13 +02:00
Ethan Nelson-Moore
8884b9b5c8 alpha: remove unnecessary architecture-specific <asm/device.h> 
arch/alpha/include/asm/device.h simply includes <asm-generic/device.h>,
and therefore the Alpha-specific version is unnecessary. Remove it.

Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://lore.kernel.org/r/20260517233246.23915-1-enelsonmoore@gmail.com
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
 2026-07-06 22:59:00 +02:00
Linus Torvalds
26ae421f7f pci-v7.2-changes 
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Merge tag 'pci-v7.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Pull pci updates from Bjorn Helgaas:
 "Enumeration:

   - Remove MPS/MRRS Kconfig settings (CONFIG_PCIE_BUS_*) that worked
     around a WiFi device defect; use a quirk or boot-time
     "pci=pcie_bus_tune_*" kernel parameter instead (Bjorn Helgaas)

   - Always lift 2.5GT/s restriction in PCIe failed link retraining to
     avoid clamping a link to 2.5GT/s after hot-plug changes the device
     (Maciej W. Rozycki)

   - Request bus reassignment when not probe-only to fix an enumeration
     regression on Marvell CN106XX and possibly other DT-based systems
     (Ratheesh Kannoth)

   - Fix procfs race between pci_proc_init() and pci_bus_add_device()
     that resulted in 'proc_dir_entry ... already registered' warnings
     and pointer corruption (Krzysztof Wilczyński)

   - Fix sysfs race that causes 'duplicate filename' warnings and boot
     panics by converting PCI resource files to static attributes
     (Krzysztof Wilczyński)

   - Expose sysfs 'resourceN_resize' attributes only on platforms with
     PCI mmap (Krzysztof Wilczyński)

   - Require CAP_SYS_ADMIN to write to sysfs 'resourceN_resize'
     attributes (Krzysztof Wilczyński)

   - Add security_locked_down(LOCKDOWN_PCI_ACCESS) to alpha PCI resource
     mmap path to match the generic path (Krzysztof Wilczyński)

   - Use kstrtobool() to parse the 'rom' attribute input to avoid the
     unexpected behavior of enabling the ROM when writing '0' with no
     trailing newline (Krzysztof Wilczyński)

  Resource management:

   - Improve resource claim logging for debuggability (Ilpo Järvinen)

   - Clean up several uses of const parameters (Ilpo Järvinen)

   - Check option ROM header signatures and lengths before accessing to
     avoid page faults and alignment faults (Guixin Liu)

  ASPM:

   - Don't reconfigure ASPM when entering low-power D-state; only do it
     when returning back to D0 (Carlos Bilbao)

  Power management:

   - During suspend, set power state to 'unknown' for all devices, not
     just those with drivers (Lukas Wunner)

   - Skip restoring Resizable BARs and VF Resizable BARs if device
     doesn't respond to config reads, to avoid invalid array accesses
     (Marco Nenciarini)

   - Add pci_suspend_retains_context() so drivers can tell whether
     devices retain internal state across suspend/resume, since some
     platforms reset devices on suspend; use this in nvme to avoid
     issues on Qcom RCs (Manivannan Sadhasivam)

  Power control:

   - Only to power on/off devices that actually support power control to
     avoid poking at incompatible devices mentioned in DT (Manivannan
     Sadhasivam)

  Virtualization and resets:

   - Log device readiness timeouts as errors, not warnings, because the
     device is likely unusable in this case (Bjorn Helgaas)

   - Wait for device readiness after soft reset (D3hot ->
     D0uninitialized transition), when the device may respond with
     Request Retry Status (RRS) if it needs more time to initialize
     (Bjorn Helgaas)

   - Drop unnecessary retries when restoring BARs because resets should
     now already include all required delays (Lukas Wunner)

   - Avoid FLR for MediaTek MT7925 WiFi, where FLR fails after a VM
     terminates uncleanly (Jose Ignacio Tornos Martinez)

   - Avoid SBR for Qualcomm WCN6855/WCN7850 WiFi, SDX62/SDX65 modems,
     which seem not to support it correctly (Jose Ignacio Tornos
     Martinez)

  Peer-to-peer DMA:

   - Prevent P2PDMA as well as CPU access to non-mappable BARs, e.g.,
     s390 ISM BARs (Matt Evans)

   - Add Intel QAT, DSA, IAA devices to whitelist (Lukas Wunner)

  Endpoint framework:

   - Add endpoint controller APIs for use by function drivers to
     discover auxiliary blocks like DMA engines (Koichiro Den)

   - Remember DesignWare eDMA engine base/size and expose them via the
     EPC aux-resource API (Koichiro Den)

   - Add endpoint embedded doorbell fallback, used if MSI allocation
     fails (Koichiro Den)

   - Validate BAR index and remove dead BAR read in endpoint doorbell
     test (Carlos Bilbao)

   - Unwind MSI/MSI-X vectors if NTB initialization fails part-way
     through (Koichiro Den)

   - Cache sleepable pci_irq_vector() value at ISR setup to avoid
     calling it from hardirq context (Koichiro Den)

   - Call sleepable pci_epc_raise_irq() from a work item instead of
     atomic context, e.g., when setting bits in NTB peer doorbells in
     the ntb_peer_db_set() path (Koichiro Den)

   - Report 0-based vNTB doorbell vector to account for link event 0 and
     historically skipped slot 1 (Koichiro Den)

   - Prevent configfs writes to vNTB db_count and other values that are
     already in use after EPC attach (Koichiro Den)

   - Account for vNTB db_valid reserved slots (link event 0 and
     historically skipped slot 1) so they don't appear as valid
     doorbells (Koichiro Den)

   - Implement vNTB .db_vector_count()/mask() for doorbells so clients
     can use multiple vectors and avoid thundering herds (Koichiro Den)

   - Report 0-based NTB doorbell vector to account for link event 0 and
     historically skipped slot 1 (Koichiro Den)

   - Fix doorbell bitmask and IRQ vector handling to clear only
     specified bits, use the correct vector for non-contiguous Linux IRQ
     numbers, and validate incoming vectors (Koichiro Den)

   - Implement NTB .db_vector_count()/mask() for doorbells so clients
     can use multiple vectors (Koichiro Den)

  Native PCIe controller infrastructure:

   - Add pci_host_common_link_train_delay() for the mandatory delay
     after > 5GT/s Link training completes and use it for cadence HPA,
     j721e, LGA; dwc; aardvark, mediatek-gen3, rzg3s (Hans Zhang)

   - Protect root bus removal with rescan lock in altera, brcmstb,
     cadence, dwc, iproc, mediatek, plda, rockchip to prevent
     use-after-free or crashes when racing with sysfs rescan or hotplug
     (Hans Zhang)

   - Add pci_host_common_parse_ports() for use by any native driver to
     parse Root Port properties (per-Link features like width, speed,
     PHY, power and reset control, etc should be described in Root Port
     stanzas, not the host bridge; currently only reset GPIOs
     implemented) (Sherry Sun)

  New native PCIe controller drivers:

   - Add DT binding and driver for UltraRISC DP1000 PCIe controller
     (Xincheng Zhang, Jia Wang)

  Altera PCIe controller driver:

   - Do not dispose of the parent IRQ mapping, which belongs to the
     parent interrupt controller (Mahesh Vaidya)

   - Fix chained IRQ handler ordering issue and resource leaks on probe
     failure (Mahesh Vaidya)

  AMD MDB PCIe controller driver:

   - Assert PERST# on shutdown so any connected Endpoints are held in
     reset during shutdown (Sai Krishna Musham)

  Amlogic Meson PCIe controller driver:

   - Propagate devm_add_action_or_reset() failure to fix probe error
     path (Shuvam Pandey)

   - Add .remove() callback to deinitialize the host bridge and power
     off the PHY (Shuvam Pandey)

  Broadcom iProc PCIe controller driver:

   - Restore .map_irq() assignment; its removal broke INTx on the iproc
     platform bus driver (Mark Tomlinson)

  Broadcom STB PCIe controller driver:

   - No change, but products using certain WiFi devices may be affected
     by removal of CONFIG_PCIE_BUS_* (see above)

  Freescale i.MX6 PCIe controller driver:

   - Move IMX6SX_GPR12_PCIE_TEST_POWERDOWN handling into the core reset
     functions (Richard Zhu)

   - Assert PERST# before enabling regulators to ensure that even if
     power is enabled, endpoint stays inactive until REFCLK is stable
     (Sherry Sun)

   - Parse reset properties in Root Port nodes (falling back to host
     bridge) to help support Key E connectors and the pwrctrl framework
     (Sherry Sun)

   - Configure i.MX95 REF_USE_PAD before PHY reset (Richard Zhu)

   - Assert i.MX95 ref_clk_en after reference clock stabilizes (Richard
     Zhu)

   - Integrate new pwrctrl API for DTs with Root Port-level power
     supplies (Sherry Sun)

  Intel Gateway PCIe controller driver:

   - Enable clock before PHY init for correct ordering (Florian Eckert)

   - Add .start_link() callback so the driver works again (Florian
     Eckert)

   - Stop overwriting the ATU base address discovered by
     dw_pcie_get_resources() (Florian Eckert)

   - Add DT 'atu' region since this is hardware-specific, and fall back
     to driver default if lacking (Florian Eckert)

  Loongson PCIe controller driver:

   - Ignore downstream devices only on internal bridges to avoid
     Loongson hardware issue (Rong Zhang)

   - Quirk old Loongson-3C6000 bridges that advertise incorrect
     supported link speeds (Ziyao Li)

  Marvell MVEBU PCIe controller driver:

   - Use fixed-width interrupt masks to avoid truncation in 64-bit
     builds (Rosen Penev)

  MediaTek PCIe controller driver:

   - Use FIELD_PREP() to fix incorrect operator precedence in
     PCIE_FTS_NUM_L0 (Li RongQing)

   - Fix IRQ domain leak when port fails to enable (Manivannan
     Sadhasivam)

   - Use actual physical address for MSI message address instead of
     virt_to_phys() (Manivannan Sadhasivam)

   - Add EcoNet EN7528 to DT binding (Caleb James DeLisle)

  MediaTek PCIe Gen3 controller driver:

   - Deassert PCIE_PHY_RSTB so REFCLK is stable for at least 100ms
     (PCIE_T_PVPERL_MS) before deasserting PERST# (Jian Yang)

   - Add .shutdown() to assert PERST# before powering down device (Jian
     Yang)

   - Do full device power down on removal, including asserting PERST#,
     when removing driver (Chen-Yu Tsai)

   - Fix a 'failed to create pwrctrl devices' error message that was
     inadvertently skipped (Chen-Yu Tsai)

  NVIDIA Tegra194 PCIe controller driver:

   - Program the DesignWare PORT_AFR L1 entrance latency based on the
     'aspm-l1-entry-delay-ns' DT property (Manikanta Maddireddy)

  Qualcomm PCIe controller driver:

   - Add Eliza SoC compatible in DT binding (Krishna Chaitanya Chundru)

   - Set max OPP during resume so DBI register accesses don't fail with
     NoC errors (Qiang Yu)

   - Add pci_host_common_d3cold_possible() to determine whether
     downstream devices are already in D3hot and wakeup-enabled devices
     are capable of generating PME from D3cold (Krishna Chaitanya
     Chundru)

   - Add .get_ltssm() callback to get the LTSSM status without DBI,
     since DBI may be inaccessible after PME_Turn_Off (Krishna Chaitanya
     Chundru)

   - Power down PHY via PARF_PHY_CTRL before disabling rails/clocks to
     avoid power leakage (Krishna Chaitanya Chundru)

   - Decide whether suspend should put the link in L2 and power down
     using pci_host_common_d3cold_possible() instead of checking whether
     ASPM L1 is enabled (Krishna Chaitanya Chundru)

   - Add qcom D3cold support to tear down interconnect bandwidth and OPP
     votes (Krishna Chaitanya Chundru)

   - Handle unsupported mixed PERST#/PHY DT configurations, e.g., PHY in
     RP node while PERST# is in the RC node, but warn about the DT issue
     (Qiang Yu)

   - Program T_POWER_ON based on DT 't-power-on-us' property in case
     hardware advertises incorrect values (Krishna Chaitanya Chundru)

   - Disable ASPM L0s for SA8775P (Shawn Guo)

   - Initialize DWC MSI lock for firmware-managed ECAM hosts, which
     don't use the dw_pcie_host_init() path that initializes the lock
     (Yadu M G)

  Renesas RZ/G3S PCIe controller driver:

   - Add RZ/V2N DT support (Lad Prabhakar)

  SOPHGO PCIe controller driver:

   - Add 'dma-coherent' DT property for sg2042-pcie driver (Han Gao)

  Synopsys DesignWare PCIe controller driver:

   - Apply ECRC TLP Digest workaround for all DesignWare cores prior to
     5.10a, not just 4.90a and 5.00a (Manikanta Maddireddy)

   - Use common struct dw_pcie 'mode' rather than duplicating it in
     artpec6, dra7xx, dwc-pcie, and keembay driver structs (Hans Zhang)

   - Use DEFINE_SHOW_ATTRIBUTE for ltssm_status debugfs to reduce
     boilerplate and fix a seq_file memory leak by including a
     .release() callback (Hans Zhang)

   - Fix a signedness bug in fault injection test code (Dan Carpenter)

   - Avoid NULL pointer dereference when tearing down debugfs for
     controller that lacks RAS DES capability (Shuvam Pandey)

  MicroSemi Switchtec management driver:

   - Add Gen6 Device IDs (Ben Reed)

  Miscellaneous:

   - Remove unused gpio.h include from amd-mdb, designware-plat, fu740,
     visconti drivers (Andy Shevchenko)

   - Fix typos in documentation (josh ziegler)

   - Use FIELD_MODIFY() instead of open-coding it (Hans Zhang)"

* tag 'pci-v7.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (168 commits)
  PCI/sysfs: Use kstrtobool() to parse the ROM attribute input
  PCI/sysfs: Limit BAR resize attribute scope to platforms with PCI mmap
  PCI/sysfs: Remove pci_create_legacy_files() and pci_sysfs_init()
  PCI/sysfs: Convert legacy I/O and memory attributes to static definitions
  PCI/sysfs: Add __weak pci_legacy_has_sparse() helper
  alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range()
  PCI: Add macros for legacy I/O and memory address space sizes
  PCI/sysfs: Remove pci_{create,remove}_sysfs_dev_files()
  alpha/PCI: Convert resource files to static attributes
  alpha/PCI: Add static PCI resource attribute macros
  alpha/PCI: Remove WARN from __pci_mmap_fits() and __legacy_mmap_fits()
  alpha/PCI: Fix __pci_mmap_fits() overflow for zero-length BARs
  alpha/PCI: Use PCI resource accessor macros
  alpha/PCI: Use BAR index in sysfs attr->private instead of resource pointer
  alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
  PCI/sysfs: Limit pci_sysfs_init() late_initcall compile scope
  PCI/sysfs: Add stubs for pci_{create,remove}_sysfs_dev_files()
  PCI/sysfs: Warn about BAR resize failure in __resource_resize_store()
  PCI/sysfs: Convert PCI resource files to static attributes
  PCI/proc: Fix race between pci_proc_init() and pci_bus_add_device()
  ...
 2026-06-24 12:48:43 -07:00
Krzysztof Wilczyński
4e14b965a6 PCI/sysfs: Convert legacy I/O and memory attributes to static definitions 
Currently, legacy_io and legacy_mem are dynamically allocated and created
by pci_create_legacy_files(), with pci_adjust_legacy_attr() updating the
attributes at runtime on Alpha to rename them and shift the size for sparse
addressing.

Convert to four static const attributes (legacy_io, legacy_io_sparse,
legacy_mem, legacy_mem_sparse) with .is_bin_visible() callbacks that use
pci_legacy_has_sparse() to select the appropriate variant per bus.  The
sizes are compile-time constants and .size is set directly on each
attribute.

Register the groups in pcibus_groups[] under a HAVE_PCI_LEGACY guard so the
driver model handles creation and removal automatically.

Stub out pci_create_legacy_files() and pci_remove_legacy_files() as the
dynamic creation is no longer needed.  Remove the __weak
pci_adjust_legacy_attr(), Alpha's override, and its declaration from both
Alpha and PowerPC asm/pci.h headers.

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://patch.msgid.link/20260508043543.217179-23-kwilczynski@kernel.org
 2026-06-23 15:19:09 -05:00
Krzysztof Wilczyński
574b5470f8 PCI/sysfs: Add __weak pci_legacy_has_sparse() helper 
Currently, Alpha's sparse/dense legacy attribute handling is done via
pci_adjust_legacy_attr(), which updates dynamically allocated attributes at
runtime.  The upcoming conversion to static attributes needs a way to
determine sparse support at visibility check time.

Add a __weak pci_legacy_has_sparse() that returns false by default.  Alpha
overrides it to check has_sparse() on the bus host controller.

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://patch.msgid.link/20260508043543.217179-22-kwilczynski@kernel.org
 2026-06-23 15:19:09 -05:00
Krzysztof Wilczyński
385ec1d407 alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range() 
Currently, pci_mmap_legacy_page_range() reads the legacy resource size from
bus->legacy_mem->size or bus->legacy_io->size.  This couples the mmap
bounds check to the struct pci_bus fields that will be removed when legacy
attributes are converted to static definitions.

Compute the size directly using PCI_LEGACY_MEM_SIZE (0x100000) and
PCI_LEGACY_IO_SIZE (0xffff) macros, and shift by 5 bits for sparse systems.

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://patch.msgid.link/20260508043543.217179-21-kwilczynski@kernel.org
 2026-06-23 15:19:09 -05:00
Krzysztof Wilczyński
b7a57ffd4d alpha/PCI: Convert resource files to static attributes 
Previously, Alpha's PCI resource files (resourceN, resourceN_sparse,
resourceN_dense) were dynamically created by pci_create_resource_files(),
which overrides the generic __weak implementation.  The previous code
allocated bin_attributes at runtime and managed them via the res_attr[] and
res_attr_wc[] fields in struct pci_dev.

Convert to static const attributes with three attribute groups (plain,
sparse, dense), each with an .is_bin_visible() callback that checks
resource length, has_sparse(), and sparse_mem_mmap_fits().  A .bin_size()
callback provides the resource size to the kernfs node, with the sparse
variant shifting by 5 bits for byte-level addressing.

Register the groups via ARCH_PCI_DEV_GROUPS so the driver model handles
creation and removal automatically.

Use the new pci_resource_is_mem() helper for the type check, replacing the
open-coded bitwise flag test.

Finally, remove pci_create_resource_files(), pci_remove_resource_files(),
pci_create_attr(), and pci_create_one_attr() which are no longer needed.

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://patch.msgid.link/20260508043543.217179-18-kwilczynski@kernel.org
 2026-06-23 15:19:09 -05:00
Krzysztof Wilczyński
5980dcbc4b alpha/PCI: Add static PCI resource attribute macros 
Add macros for declaring static binary attributes for Alpha's PCI resource
files:

  - pci_dev_resource_attr(),        for dense/BWX systems (mmap dense)
  - pci_dev_resource_sparse_attr(), for sparse systems (mmap sparse)
  - pci_dev_resource_dense_attr(),  for dense companion files (mmap dense)

Each macro creates a const bin_attribute with the BAR index stored in the
.private property and the appropriate .mmap() callback.

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://patch.msgid.link/20260508043543.217179-17-kwilczynski@kernel.org
 2026-06-23 15:19:09 -05:00
Krzysztof Wilczyński
29840080f5 alpha/PCI: Remove WARN from __pci_mmap_fits() and __legacy_mmap_fits() 
Remove the WARN() that fires when userspace attempts to mmap beyond the BAR
bounds.  The check still returns 0 to reject the mapping, but the warning
is excessive for normal operation.

A similar warning was removed from the PCI core in the commit 3b519e4ea6
("PCI: fix size checks for mmap() on /proc/bus/pci files").

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
[bhelgaas: squash https://lore.kernel.org/all/20260508045824.GA3160093@rocinante]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://patch.msgid.link/20260508043543.217179-16-kwilczynski@kernel.org
 2026-06-23 15:19:09 -05:00
Krzysztof Wilczyński
802a3b3f47 alpha/PCI: Fix __pci_mmap_fits() overflow for zero-length BARs 
Currently, __pci_mmap_fits() computes the BAR size using
"pci_resource_len() - 1", which wraps to a large value when the BAR length
is zero, causing the bounds check to incorrectly succeed.

Add an early return for empty resources.

Fixes: 10a0ef39fb ("PCI/alpha: pci sysfs resources")
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://patch.msgid.link/20260508043543.217179-15-kwilczynski@kernel.org
 2026-06-23 15:19:08 -05:00
Krzysztof Wilczyński
30d01a8c3a alpha/PCI: Use PCI resource accessor macros 
Replace direct pdev->resource[] accesses with pci_resource_n(), and
open-coded res->flags type checks with pci_resource_is_mem() and
pci_resource_start() helpers.

While at it, move the pci_resource_n() call directly into
pcibios_resource_to_bus() and drop the local struct resource pointer.

No functional changes intended.

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://patch.msgid.link/20260508043543.217179-14-kwilczynski@kernel.org
 2026-06-23 15:19:08 -05:00
Krzysztof Wilczyński
7d9779cb10 alpha/PCI: Use BAR index in sysfs attr->private instead of resource pointer 
Currently, Alpha's pci_create_one_attr() stores a resource pointer in
attr->private, and pci_mmap_resource() loops through all BARs to find
the matching index.

Store the BAR index directly in attr->private and retrieve the resource via
pci_resource_n().  This eliminates the loop and aligns with the convention
used by the generic PCI sysfs code.

The PCI core change was first added in the commit dca40b186b ("PCI: Use
BAR index in sysfs attr->private instead of resource pointer").

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://patch.msgid.link/20260508043543.217179-13-kwilczynski@kernel.org
 2026-06-23 15:19:08 -05:00
Krzysztof Wilczyński
78a228f0aa alpha/PCI: Add security_locked_down() check to pci_mmap_resource() 
Currently, Alpha's pci_mmap_resource() does not check
security_locked_down(LOCKDOWN_PCI_ACCESS) before allowing userspace to mmap
PCI BARs.

The generic version has had this check since commit eb627e1772 ("PCI:
Lock down BAR access when the kernel is locked down") to prevent DMA
attacks when the kernel is locked down.

Add the same check to Alpha's pci_mmap_resource().

Fixes: eb627e1772 ("PCI: Lock down BAR access when the kernel is locked down")
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Magnus Lindholm <linmag7@gmail.com>
Link: https://patch.msgid.link/20260508043543.217179-12-kwilczynski@kernel.org
 2026-06-23 15:19:08 -05:00
Kees Cook
4cb5e246e6 alpha: Remove arch-specific strncpy() implementation 
strncpy() has no remaining callers in the kernel[1]. Remove the
alpha-specific assembly implementation and __HAVE_ARCH_STRNCPY define,
falling back to the generic version in lib/string.c.

The __stxncpy helper (stxncpy.S/ev6-stxncpy.S) is retained as it is
still used by strncat.

Link: https://github.com/KSPP/linux/issues/90 [1]
Signed-off-by: Kees Cook <kees@kernel.org>
 2026-06-18 16:37:12 -07:00
Linus Torvalds
bd77e50c9a fbdev fixes & cleanups for 7.2-rc1: 
Removal of drivers:
 - Hercules monochrome ISA graphics adapter driver [Ethan Nelson-Moore]
 - Hercules mdacon console driver [Ethan Nelson-Moore]
 
 Changes affecting many drivers at once:
 - possible memory leak fixes in various drivers [Abdun Nihaal]
 - many conversions to use strscpy() [David Laight]
 - Use named initializers in drivers [Uwe Kleine-König]
 
 Code fixes:
 - fbcon: don't suspend/resume when vc is graphics mode [Lu Yao]
 - modedb: fix a possible UAF in fb_find_mode() [Tuo Li]
 - modedb: Fix entry for 1920x1080-60 mode [Steffen Persvold]
 - arm: Export acorndata_8x8 font symbol for bootloader [Helge Deller]
 - omap2: fix use-after-free in omapfb_mmap [Hongling Zeng]
 
 Cleanups:
 - pxa168fb: use devm_ioremap_resource() [AlbertoArostegui]
 - provice helpers for fb_set_var() and fb_blank() and fbcon updates [Thomas Zimmermann]
 - fbcon: Use correct type for vc_resize() return value [Jiacheng Yu]
 - chipsfb: add missing MODULE_DESCRIPTION() macro [Rahman Mahmutović]
 - sunxvr2500: replace printk with device-aware logging functions [Rahman Mahmutović]
 - sm712: Fix operator precedence in big_swap macro [Li RongQing]
 - imxfb: Use of_device_get_match_data() [Rosen Penev]
 - atmel_lcdfb: Use of_device_get_match_data() [Rosen Penev]
 
 Documentation fixes:
 - grvga: Fix CLUT register address offset in comment [Eduardo Silva]
 - omap/dss: Fix stale modedb.c path [Costa Shulyupin]
 - correct CONFIG_FB_TILEBLITTING macro name in #endif comment [Ethan Nelson-Moore]
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Merge tag 'fbdev-for-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev

Pull fbdev updates from Helge Deller:
 "Beside the removal of the Hercules monochrome ISA graphics driver and
  the corresponding text console driver, there is just the typical
  maintanance with smaller driver fixes and cleanups:

  Removal of drivers:
   - Hercules monochrome ISA graphics adapter driver (Ethan Nelson-Moore)
   - Hercules mdacon console driver (Ethan Nelson-Moore)

  Changes affecting many drivers at once:
   - possible memory leak fixes in various drivers (Abdun Nihaal)
   - many conversions to use strscpy() (David Laight)
   - Use named initializers in drivers (Uwe Kleine-König)

  Code fixes:
   - fbcon: don't suspend/resume when vc is graphics mode (Lu Yao)
   - modedb: fix a possible UAF in fb_find_mode() (Tuo Li)
   - modedb: Fix entry for 1920x1080-60 mode (Steffen Persvold)
   - arm: Export acorndata_8x8 font symbol for bootloader (Helge Deller)
   - omap2: fix use-after-free in omapfb_mmap (Hongling Zeng)

  Cleanups:
   - pxa168fb: use devm_ioremap_resource() (Alberto Arostegui)
   - provice helpers for fb_set_var() and fb_blank() and fbcon updates
     (Thomas Zimmermann)
   - fbcon: Use correct type for vc_resize() return value (Jiacheng Yu)
   - chipsfb: add missing MODULE_DESCRIPTION() macro (Rahman Mahmutović)
   - sunxvr2500: replace printk with device-aware logging functions
     (Rahman Mahmutović)
   - sm712: Fix operator precedence in big_swap macro (Li RongQing)
   - imxfb: Use of_device_get_match_data() (Rosen Penev)
   - atmel_lcdfb: Use of_device_get_match_data() (Rosen Penev)

  Documentation fixes:
   - grvga: Fix CLUT register address offset in comment (Eduardo Silva)
   - omap/dss: Fix stale modedb.c path (Costa Shulyupin)
   - correct CONFIG_FB_TILEBLITTING macro name in #endif comment (Ethan
     Nelson-Moore)"

* tag 'fbdev-for-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: (43 commits)
  fbdev: modedb: Fix misaligned fields in the 1920x1080-60 mode
  fbdev: modedb: fix a possible UAF in fb_find_mode()
  fbdev: s3fb: Use strscpy() to copy strings into arrays
  fbdev: sm501fb: Fix buffer errors in OF binding code
  fbcon: correct CONFIG_FB_TILEBLITTING macro name in #endif comment
  fbdev/arm: Export acorndata_8x8 font symbol for bootloader
  fbdev: mmpfb: Use strscpy() to copy device name
  fbdev: sisfb: Replace strlen() strcpy() pair with strscpy()
  fbdev: rivafb: Use strscpy() to copy device name
  fbdev: cyber2000fb: Use strscpy() to copy device name
  fbdev: atmel_lcdfb: Use strscpy() to copy device name
  fbdev: Do not export fbcon from fbdev
  fbdev: Wrap fbcon updates from vga-switcheroo in helper
  fbdev: Wrap user-invoked calls to fb_blank() in helper
  fbdev: Wrap user-invoked calls to fb_set_var() in helper
  fbdev: omap2: fix use-after-free in omapfb_mmap
  docs: omap/dss: Fix stale modedb.c path
  fbdev: pxa168fb: use devm_ioremap_resource() for MMIO
  fbdev: grvga: Fix CLUT register address offset in comment
  fbdev: sunxvr2500: replace printk with device-aware logging functions
  ...
 2026-06-16 08:28:41 +05:30
Linus Torvalds
13e1a6d6a1 Interrupt core code changes: 
- Rework of /proc/interrupt handling:
 
       /proc/interrupts was subject to micro optimizations for a long time,
       but most of the low hanging fruit was left on the table. This rework
       addresses the major time consuming issues:
 
         - Printing a long series of zeros one by one via a format string
           instead of counting subsequent zeros and emitting a string
           constant.
 
         - Simplify and cache the conditions whether interrupts should be printed
 
 	- Use a proper iteration over the interrupt descriptor xarray
           instead of walking and testing one by one.
 
         - Provide helper functions for the architecture code to emit the
           architecture specific counters
 
 	- Convert the counter structure in x86 to an array, which
           simplifies the output and add mechanisms to suppress unused
           architecture interrupts, which just occupy space for
           nothing. Adopt the new core mechanisms.
 
       This adjusts the gdb scripts related to interrupt counter statitics
       to work with the new mechanisms.
 
     - Prevent a string overflow in the /proc/irq/$N/ directory name
       creation code.
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Merge tag 'irq-core-2026-06-13' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip

Pull interrupt core updates from Thomas Gleixner:

  - Rework of /proc/interrupt handling:

    /proc/interrupts was subject to micro optimizations for a long time,
    but most of the low hanging fruit was left on the table. This rework
    addresses the major time consuming issues:

      - Printing a long series of zeros one by one via a format string
        instead of counting subsequent zeros and emitting a string
        constant.

      - Simplify and cache the conditions whether interrupts should be
        printed

      - Use a proper iteration over the interrupt descriptor xarray
        instead of walking and testing one by one.

      - Provide helper functions for the architecture code to emit the
        architecture specific counters

      - Convert the counter structure in x86 to an array, which
        simplifies the output and add mechanisms to suppress unused
        architecture interrupts, which just occupy space for nothing.
        Adopt the new core mechanisms.

    This adjusts the gdb scripts related to interrupt counter statistics
    to work with the new mechanisms.

  - Prevent a string overflow in the /proc/irq/$N/ directory name
    creation code.

* tag 'irq-core-2026-06-13' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip:
  x86/irq: Add missing 's' back to thermal event printout
  genirq/proc: Speed up /proc/interrupts iteration
  genirq/proc: Runtime size the chip name
  genirq: Expose irq_find_desc_at_or_after() in core code
  genirq: Add rcuref count to struct irq_desc
  genirq/proc: Increase default interrupt number precision to four
  genirq: Calculate precision only when required
  genirq: Cache the condition for /proc/interrupts exposure
  genirq/manage: Make NMI cleanup RT safe
  genirq: Expose nr_irqs in core code
  scripts/gdb: Update x86 interrupts to the array based storage
  x86/irq: Move IOAPIC misrouted and PIC/APIC error counts into irq_stats
  x86/irq: Suppress unlikely interrupt stats by default
  x86/irq: Make irqstats array based
  genirq/proc: Utilize irq_desc::tot_count to avoid evaluation
  genirq/proc: Avoid formatting zero counts in /proc/interrupts
  x86/irq: Optimize interrupts decimals printing
  genirq/proc: Size interrupt directory names for 10-digit interrupt numbers
 2026-06-15 13:19:41 +05:30
Linus Torvalds
7e0e7bd60d vfs-7.2-rc1.misc 
Please consider pulling these changes from the signed vfs-7.2-rc1.misc tag.
 
 Thanks!
 Christian
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Merge tag 'vfs-7.2-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull misc vfs updates from Christian Brauner:
 "Features:

   - Reduce pipe->mutex contention by pre-allocating pages outside the
     lock in anon_pipe_write().

     anon_pipe_write() called alloc_page() once per page while holding
     pipe->mutex. The allocation can sleep doing direct reclaim and runs
     memcg charging, which extends the critical section and stalls any
     concurrent reader on the same mutex. Now up to 8 pages are
     pre-allocated before the mutex is taken, leftovers are recycled
     into the per-pipe tmp_page[] cache before unlock, and any remainder
     is released after unlock, keeping the allocator out of the critical
     section on both sides. On a writers x readers sweep with 64KB
     writes against a 1 MB pipe throughput improves 6-28% and average
     write latency drops 5-22%; under memory pressure - when the cost of
     holding the mutex across reclaim is highest - throughput improves
     21-48% and latency drops 17-33%. The microbenchmark is added to
     selftests.

   - uaccess/sockptr: fix the ignored_trailing logic in
     copy_struct_to_user() to behave as documented and the usize check
     in copy_struct_from_sockptr() for user pointers, and add
     copy_struct_{from,to}_bounce_buffer() and copy_struct_to_sockptr()
     helpers for upcoming users (IPPROTO_SMBDIRECT, IPPROTO_QUIC).

   - bpf: add a sleepable bpf_real_inode() kfunc that resolves the real
     inode backing a dentry via d_real_inode(). On overlayfs the inode
     attached to the dentry doesn't carry the underlying device
     information; this is used by the filesystem restriction BPF program
     that was merged into systemd.

   - docs: add guidelines for submitting new filesystems, motivated by
     the maintenance burden abandoned and untestable filesystems impose
     on VFS developers, blocking infrastructure work like folio
     conversions and iomap migration.

  Fixes:

   - libfs: set SB_I_NOEXEC and SB_I_NODEV by default in init_pseudo()
     and drop the now-redundant assignments in callers. This began as a
     one-line dma-buf fix for a path_noexec() warning; a pseudo
     filesystem has no reason not to set SB_I_NOEXEC. All init_pseudo()
     callers were audited: the only visible effect is on dma-buf where
     SB_I_NOEXEC silences the warning.

   - Handle set_blocksize() failures in legacy filesystems (bfs, hpfs,
     qnx4, jfs, befs, affs, isofs, minix, ntfs3, omfs). Mounting a
     device with a sector size > PAGE_SIZE crashed roughly half of them;
     the rest had the same missing error handling pattern. Plus a
     follow-up releasing the superblock buffer_head when setting the
     minix v3 block size fails.

   - mount: honour SB_NOUSER in the new mount API.

   - fs/fcntl: fix a SOFTIRQ-unsafe lock order in fasync signaling by
     switching the process-group paths of send_sigio() and send_sigurg()
     from read_lock(&tasklist_lock) to RCU, matching the single-PID
     path.

   - vfs: add an FS_USERNS_DELEGATABLE flag and set it for NFS, fixing
     delegated NFS mounts (fsopen() in a container with the mount
     performed by a privileged daemon) that broke when non-init
     s_user_ns was tied to FS_USERNS_MOUNT.

   - selftests/namespaces: fix a hang in nsid_test where an unreaped
     grandchild kept the TAP pipe write-end open, a waitpid(-1) race in
     listns_efault_test, and a false FAIL on kernels without listns()
     where the tests should SKIP.

   - filelock: fix the break_lease() stub signature for
     CONFIG_FILE_LOCKING=n.

   - init/initramfs_test: wait for the async initramfs unpacking before
     running; the test and do_populate_rootfs() share the parser state.

   - fs/coredump: reduce redundant log noise in
     validate_coredump_safety().

   - iomap: pass the correct length to fserror_report_io() in
     __iomap_write_begin().

   - backing-file: fix the backing_file_open() kerneldoc.

  Cleanups:

   - initramfs: refactor the cpio hex header parsing to use hex2bin()
     instead of the hand-rolled simple_strntoul() which is reverted, and
     extend the initramfs KUnit tests to cover header fields with 0x
     prefixes.

   - Replace __get_free_pages() and friends with kmalloc()/kzalloc()
     across quota, proc, ocfs2/dlm, nilfs2, nfs, nfsd, libfs, jfs, jbd2,
     isofs, fuse, select, namespace, configfs, binfmt_misc, bfs, and the
     do_mounts init code - part of the larger work of replacing page
     allocator calls with kmalloc().

   - Use clear_and_wake_up_bit() in unlock_buffer() and
     journal_end_buffer_io_sync() instead of open-coding the sequence.

   - Drop unused VFS exports: unexport drop_super_exclusive(), remove
     start_removing_user_path_at(), and fold __start_removing_path()
     into start_removing_path().

   - fs/read_write: narrow the __kernel_write() export with
     EXPORT_SYMBOL_FOR_MODULES().

   - vfs: uapi: retire octal and hex constants in favor of (1 << n) for
     the O_ flags. Finding a free bit for a new flag across the
     architectures was needlessly hard with the mixed bases.

   - dcache: add extra sanity checks of dead dentries in dentry_free()
     via a new DENTRY_WARN_ONCE() that also prints d_flags.

   - iov_iter: use kmemdup_array() in dup_iter() to harden the
     allocation against multiplication overflow.

   - fs/pipe: write to ->poll_usage only once.

   - vfs: remove an always-taken if-branch in find_next_fd().

   - dcache: use kmalloc_flex() for struct external_name in __d_alloc().

   - namei: use QSTR() instead of QSTR_INIT() in path_pts().

   - sync_file_range: delete dead S_ISLNK code.

   - Comment fixes: retire a stale comment in fget_task_next() and fix
     assorted spelling mistakes"

* tag 'vfs-7.2-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (73 commits)
  backing-file: fix backing_file_open() kerneldoc parameter
  iomap: pass the correct len to fserror_report_io in __iomap_write_begin
  vfs: add FS_USERNS_DELEGATABLE flag and set it for NFS
  filelock: fix break_lease() stub signature for CONFIG_FILE_LOCKING=n
  vfs: uapi: retire octal and hex numbers in favor of (1 << n) for O_ flags
  bpf: add bpf_real_inode() kfunc
  fs/read_write: Do not export __kernel_write() to the entire world
  libfs: drop redundant SB_I_NOEXEC/SB_I_NODEV in init_pseudo() callers
  libfs: set SB_I_NOEXEC and SB_I_NODEV by default in init_pseudo()
  mount: honour SB_NOUSER in the new mount API
  fs/fcntl: fix SOFTIRQ-unsafe lock order in fasync signaling
  selftests/pipe: add pipe_bench microbenchmark
  fs/pipe: pre-allocate pages outside pipe->mutex in anon_pipe_write
  fs: retire stale comment in fget_task_next()
  fs: fix spelling mistakes in comment
  bfs: replace get_zeroed_page() with kzalloc()
  binfmt_misc: replace __get_free_page() with kmalloc()
  configfs: replace __get_free_pages() with kzalloc()
  fs/namespace: use __getname() to allocate mntpath buffer
  fs/select: replace __get_free_page() with kmalloc()
  ...
 2026-06-15 03:59:45 +05:30
Linus Torvalds
50b900c564 vfs-7.2-rc1.openat2 
Please consider pulling these changes from the signed vfs-7.2-rc1.openat2 tag.
 
 Thanks!
 Christian
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Merge tag 'vfs-7.2-rc1.openat2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull openat2 updates from Christian Brauner:
 "Features:

   - Add O_EMPTYPATH to openat(2)/openat2(2). To get an operable file
     descriptor from an O_PATH file descriptor it is possible to use
     openat(fd, ".", O_DIRECTORY) for directories, but other file types
     require going through open("/proc/<pid>/fd/<nr>") and thus depend
     on a functioning procfs.

     With O_EMPTYPATH an empty path string is accepted and LOOKUP_EMPTY
     is set at path resolution time, allowing to reopen the file behind
     the file descriptor directly. Selftests are included.

   - Add an OPENAT2_REGULAR flag for openat2(2) which refuses to open
     anything but regular files with the new EFTYPE error code.

     This implements the "ability to only open regular files" feature
     requested by userspace via uapi-group.org and protects services
     from being redirected to fifos, device nodes, and friends.

     All atomic_open implementations were audited for OPENAT2_REGULAR
     handling. Explicit checks were added to ceph, gfs2, nfs (v4), and
     cifs/smb - these are the filesystems whose atomic_open can
     encounter an existing non-regular file and would otherwise call
     finish_open() on it or return a misleading error code.

     The remaining implementations (9p, fuse, vboxsf, nfs v2/v3) only
     call finish_open() on freshly created files and use
     finish_no_open() for lookup hits, letting the VFS catch non-regular
     files via the do_open() safety net.

  Cleanups:

   - Migrate the openat2 selftests to the kselftest harness and move
     them under selftests/filesystems/. The tests were written in the
     early days of selftests' TAP support and the modern kselftest
     harness is much easier to follow and maintain. The contents of the
     tests are unchanged and the new emptypath tests are ported on top.

   - Make the LAST_XXX last-type constants private to fs/namei.c. The
     only user outside of fs/namei.c was ksmbd which only needs to know
     whether the last component is a regular one, so
     vfs_path_parent_lookup() now performs the LAST_NORM check
     internally. The ints are replaced with a dedicated enum last_type"

* tag 'vfs-7.2-rc1.openat2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  vfs: replace ints with enum last_type for LAST_XXX
  vfs: make LAST_XXX private to fs/namei.c
  selftests: openat2: port emptypath_test to kselftest harness
  kselftest/openat2: test for OPENAT2_REGULAR flag
  openat2: new OPENAT2_REGULAR flag support
  openat2: introduce EFTYPE error code
  selftest: add tests for O_EMPTYPATH
  vfs: add O_EMPTYPATH to openat(2)/openat2(2)
  selftests: openat2: migrate to kselftest harness
  selftests: openat2: switch from custom ARRAY_LEN to ARRAY_SIZE
  selftests: openat2: move helpers to header
  selftests: move openat2 tests to selftests/filesystems/
 2026-06-15 03:11:05 +05:30
Jori Koolstra
0da79c259a
vfs: uapi: retire octal and hex numbers in favor of (1 << n) for O_ flags 
A recent build failure[1] exposed the diffculty of working with the
current octal and hex definitions of O_ flags when trying to find a gap
for a new flag. This difficulty is compounded by the fact that O_ flags
may have architectural specific values.

Replace the hex/octal #defines, which are hard to parse when looking for
free bits, with explicit bit shifts like (1 << 11). Also, add comments
that identify which architectures redefine some of the seemingly free
("cursed") bits in uapi/asm-generic/fcntl.h. These should not be used to
define new O_ flags (for now, at least).

The translastion was done with Claude Opus 4.8, and verified with a
(non-AI) gawk script. The accounting of which architectures claim
which bit-gaps in uapi/asm-generic/fcntl.h is also done by hand.

[1]: https://lore.kernel.org/all/agruPPybCx8q2XcJ@sirena.org.uk/

Assisted-by: Claude:Opus 4.8
Signed-off-by: Jori Koolstra <jkoolstra@xs4all.nl>
Link: https://patch.msgid.link/20260604222405.5382-1-jkoolstra@xs4all.nl
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
 2026-06-06 15:34:03 +02:00
Thomas Gleixner
34594da765 genirq/proc: Increase default interrupt number precision to four 
Quite some architectures have four character wide acronyms for architecture
specific interrupts like IPI, NMI, etc.

The default precision of printing the Linux device interrupt numbers is
three, which causes quite some code to play games with adding or omitting
space after the acronym and the colon in order to keep the per CPU numbers
properly aligned.

Increase the default number precision to four in the core code and get rid
of the space games all over the place. At the same time align all
architecture specific descriptor texts left so that they show up in the
same column as the interrupt chip names, which makes the output more
uniform accross architectures. Fix up the GDB script to this new scheme as
well.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260517194931.839482411@kernel.org
 2026-05-26 16:21:14 +02:00
Masami Hiramatsu (Google)
a494d3c8d5 ring-buffer: Flush and stop persistent ring buffer on panic 
On real hardware, panic and machine reboot may not flush hardware cache
to memory. This means the persistent ring buffer, which relies on a
coherent state of memory, may not have its events written to the buffer
and they may be lost. Moreover, there may be inconsistency with the
counters which are used for validation of the integrity of the
persistent ring buffer which may cause all data to be discarded.

To avoid this issue, stop recording of the ring buffer on panic and
flush the cache of the ring buffer's memory.

Fixes: e645535a95 ("tracing: Add option to use memmapped memory for trace boot instance")
Cc: stable@vger.kernel.org
Cc: Will Deacon <will@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Ian Rogers <irogers@google.com>
Link: https://patch.msgid.link/177751969602.2136606.12031934362587643488.stgit@mhiramat.tok.corp.google.com
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
 2026-05-21 08:20:58 -04:00
Dorjoy Chowdhury
cf1b04aaef
openat2: introduce EFTYPE error code 
Introduce a new error code EFTYPE for wrong file type operations.
EFTYPE is already used in BSD systems like FreeBSD and macOS.

This will be used by the upcoming OPENAT2_REGULAR flag support to
return a specific error when a path doesn't refer to a regular file.

Signed-off-by: Dorjoy Chowdhury <dorjoychy111@gmail.com>
Link: https://patch.msgid.link/20260328172314.45807-2-dorjoychy111@gmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Aleksa Sarai <aleksa@amutable.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
 2026-05-21 10:53:41 +02:00
Ethan Nelson-Moore
e38b27199e console: mdacon: remove this obsolete driver 
The mdacon driver supports using ISA MDA or Hercules-compatible display
adapters as a secondary text console. This was commonly used in the
1990s and earlier for debugging software which took over the primary
display. It is highly unlikely anyone is doing so nowadays because
serial consoles and much better methods of debugging exist.

The driver is not enabled by any defconfig, nor any of the
dozens of distro configs collected at [1]. It has been relegated to VTs
13-16 since commit 0b9cf3aa6b ("mdacon messing up default vc's - set
default to vc13-16 again") in Linux 2.6.27 (and before Linux 2.5.53 -
see the link in the message of the above commit). The change in 2.6.27
was done because it was incorrectly detecting non-MDA adapters as MDA
and taking over all VTs, rendering them unusable.

Furthermore, vgacon supports using MDA/Hercules-compatible adapters as
the primary text console, so any systems with only one of these
adapters were already using vgacon and will not experience any loss in
functionality from the removal of this driver.

Given all of these factors, the mdacon driver is likely entirely
unused. Remove it.

[1] f0bee86a13

Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
 2026-05-20 20:23:32 +02:00
Linus Torvalds
64edfa6506 Delete some obsolete networking code 
Old code like amateur radio and NFC have long been a burden
 to core networking developers. syzbot loves to find bugs
 in BKL-era code, and noobs try to fix them.
 
 If we want to have a fighting chance of surviving the LLM-pocalypse
 this code needs to find a dedicated owner or get deleted.
 We've talked about these deletions multiple times in the past
 and every time someone wanted the code to stay. It is never
 very clear to me how many of those people actually use the code
 vs are just nostalgic to see it go. Amateur radio did have
 occasional users (or so I think) but most users switched
 to user space implementations since its all super slow stuff.
 Nobody stepped up to maintain the kernel code.
 
 We were lucky enough to find someone who wants to help with NFC
 so we're giving that a chance. Let's try to put the rest of
 this code behind us.
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-deletions' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking deletions from Jakub Kicinski:
 "Delete some obsolete networking code

  Old code like amateur radio and NFC have long been a burden to core
  networking developers. syzbot loves to find bugs in BKL-era code, and
  noobs try to fix them.

  If we want to have a fighting chance of surviving the LLM-pocalypse
  this code needs to find a dedicated owner or get deleted. We've talked
  about these deletions multiple times in the past and every time
  someone wanted the code to stay. It is never very clear to me how many
  of those people actually use the code vs are just nostalgic to see it
  go. Amateur radio did have occasional users (or so I think) but most
  users switched to user space implementations since its all super slow
  stuff. Nobody stepped up to maintain the kernel code.

  We were lucky enough to find someone who wants to help with NFC so
  we're giving that a chance. Let's try to put the rest of this code
  behind us"

* tag 'net-deletions' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next:
  drivers: net: 8390: wd80x3: Remove this driver
  drivers: net: 8390: ultra: Remove this driver
  drivers: net: 8390: AX88190: Remove this driver
  drivers: net: fujitsu: fmvj18x: Remove this driver
  drivers: net: smsc: smc91c92: Remove this driver
  drivers: net: smsc: smc9194: Remove this driver
  drivers: net: amd: nmclan: Remove this driver
  drivers: net: amd: lance: Remove this driver
  drivers: net: 3com: 3c589: Remove this driver
  drivers: net: 3com: 3c574: Remove this driver
  drivers: net: 3com: 3c515: Remove this driver
  drivers: net: 3com: 3c509: Remove this driver
  net: packetengines: remove obsolete yellowfin driver and vendor dir
  net: packetengines: remove obsolete hamachi driver
  net: remove unused ATM protocols and legacy ATM device drivers
  net: remove ax25 and amateur radio (hamradio) subsystem
  net: remove ISDN subsystem and Bluetooth CMTP
  caif: remove CAIF NETWORK LAYER
 2026-04-24 09:41:58 -07:00
Mingyu Wang
aec3202247 net: packetengines: remove obsolete yellowfin driver and vendor dir 
Similar to the hamachi driver, the yellowfin driver supports hardware
that is over two decades old and no longer in active use.

Since yellowfin was the last remaining driver in the packetengines
vendor directory, we can now safely remove the entire directory and
drop its associated references from the parent Kconfig and Makefile.

This eliminates dead code and reduces the overall maintenance burden
on the netdev subsystem.

Signed-off-by: Mingyu Wang <25181214217@stu.xidian.edu.cn>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260422044820.485660-3-25181214217@stu.xidian.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-04-23 14:49:08 -07:00