[Deepin-Kernel-SIG] [linux 6.6.y] [Upstream] Sync stable fix from upstream

[opsiff]

Summary by Sourcery

Sync the Linux 6.6 stable branch with a broad collection of upstream fixes and maintenance updates.

Bug Fixes:

• Backport a broad set of upstream stable fixes across KVM, IOMMUFD, RISC-V CPU detection, UBI/UBIFS, networking, drivers, filesystems, security, and selftests.
• Correct device-tree bindings, platform descriptions, and hardware configuration metadata for affected boards and peripherals.

Enhancements:

• Improve IOMMUFD object lifetime and destruction synchronization.
• Improve RISC-V misaligned-access performance detection across boot and hotplugged CPUs.
• Refine UBI fastmap pool management and eraseblock handling.
• Update KVM clock, interrupt, memory-management, module-lifetime, and debugfs behavior.

Documentation:

• Synchronize kernel documentation and device-tree binding corrections from upstream.

Tests:

• Fix and clean up KVM, memory-management, and nolibc selftests.

Chores:

• Apply miscellaneous upstream cleanups, API corrections, annotations, and dead-code removals throughout the 6.6 kernel tree.

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Reviewer's Guide

This PR backports a large collection of upstream stable fixes into linux 6.6.y, spanning binding and documentation corrections, architecture and KVM behavior, CPU feature handling, IOMMUFD and UBI lifetime/locking changes, driver error-path and resource-management fixes, filesystem and memory correctness fixes, module ownership updates, and test/tooling cleanup.

Sequence diagram for IOMMUFD object destruction

sequenceDiagram
    participant User as Userspace
    participant API as iommufd_object_remove
    participant Obj as iommufd_object
    participant Wait as destroy_wait
    participant Ops as object_ops.destroy

    User->>API: iommufd_object_remove
    API->>Obj: iommufd_object_dec_wait_shortterm
    alt shortterm_users reaches zero
        API->>Obj: remove from objects xarray
        API->>Ops: destroy
        Ops-->>API: completed
        API-->>User: return 0
    else shortterm users remain
        API->>Wait: wait_event_timeout
        Obj-->>Wait: wake_up_interruptible_all
        Wait-->>API: references drained
        API->>Ops: destroy
        Ops-->>API: completed
        API-->>User: return 0
    end

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Sequence diagram for parallel RISC-V misaligned access measurement

sequenceDiagram
    participant Init as arch_initcall
    participant CPUs as Online CPUs
    participant Boot as CPU0
    participant Hotplug as CPU hotplug

    Init->>Init: check_unaligned_access_all_cpus
    Init->>Init: alloc_pages
    Init->>CPUs: on_each_cpu
    CPUs->>CPUs: check_unaligned_access
    Init->>Boot: smp_call_on_cpu
    Boot->>Boot: check_unaligned_access
    Init->>Init: __free_pages
    Init->>Hotplug: cpuhp_setup_state_nocalls
    Hotplug->>Hotplug: riscv_online_cpu
    Hotplug->>Hotplug: alloc_pages
    Hotplug->>Hotplug: check_unaligned_access
    Hotplug->>Hotplug: __free_pages

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Flow diagram for UBI fastmap pool refilling

flowchart TD
    A[ubi_update_fastmap] --> B[ubi_refill_pools_and_lock]
    B --> C{Writable and fastmap enabled?}
    C -- Yes --> D[wait_free_pebs_for_pool]
    D --> E[do_work]
    E --> D
    C -- No --> F[Acquire fastmap and work locks]
    D --> F
    F --> G[return_unused_pool_pebs]
    G --> H[Refill fastmap pools]
    H --> I[Write updated fastmap]
    I --> J[erase_block]
    J --> K[Update erase counter and max_ec]
    K --> L[Release locks]

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File-Level Changes

Change	Details	Files
Synchronize a broad set of stable upstream fixes across documentation, device-tree bindings, architecture code, drivers, filesystems, core kernel code, tooling, and selftests.	Correct binding schemas and examples, ABI references, comments, and documentation metadata. Update device-tree and platform data for Qualcomm, TI, MediaTek, Freescale, and other hardware. Apply KVM fixes for nested ARM64 register trapping, VGIC v4 forwarding, x86 MMU dirty logging, SVM NMI injection, TSC masterclock tracking, vCPU state detection, and module/file-operation ownership. Rework RISC-V misaligned-access benchmarking to run on CPUs in parallel and support CPU hotplug. Fix IOMMUFD object lifetime and destruction races using short-term references, wait queues, and coordinated xarray removal. Fix UBI fastmap pool refilling, erase-block accounting, locking, work execution tracking, and reserved-PEB handling. Harden network, USB, firmware, GPIO, regulator, MTD, UBIFS, clock, cpufreq, and miscellaneous driver error paths and resource cleanup. Adjust MM/VMA boundary checks, BPF helper metadata, stack depot initialization, SELinux behavior, and modpost format checking. Clean up or correct selftests, perf option text, UAPI formatting, symbol visibility, and kernel comments.	Documentation/ABI/testing/sysfs-class-hwmon Documentation/arch/x86/boot.rst Documentation/devicetree/bindings/display/msm/qcom,qcm2290-mdss.yaml Documentation/devicetree/bindings/iio/adc/qcom,spmi-iadc.yaml Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.yaml Documentation/devicetree/bindings/leds/common.yaml Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml Documentation/devicetree/bindings/mfd/hisilicon,hi6421-spmi-pmic.yaml Documentation/devicetree/bindings/phy/amlogic,g12a-mipi-dphy-analog.yaml Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,cpm1-scc-qmc.yaml Documentation/devicetree/bindings/usb/qcom,dwc3.yaml Documentation/devicetree/bindings/usb/usb-hcd.yaml Documentation/networking/smc-sysctl.rst Documentation/trace/coresight/coresight.rst MAINTAINERS arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts arch/arm64/boot/dts/mediatek/mt6358.dtsi arch/arm64/boot/dts/mediatek/mt8183-kukui-jacuzzi.dtsi arch/arm64/boot/dts/ti/k3-am64-phycore-som.dtsi arch/arm64/kvm/emulate-nested.c arch/arm64/kvm/vgic/vgic-v4.c arch/mips/sgi-ip27/ip27-hubio.c arch/powerpc/platforms/pasemi/setup.c arch/riscv/include/asm/cpufeature.h arch/riscv/kernel/cpufeature.c arch/riscv/kernel/smpboot.c arch/x86/kvm/debugfs.c arch/x86/kvm/mmu/mmu.c arch/x86/kvm/mmu/tdp_mmu.c arch/x86/kvm/svm/svm.c arch/x86/kvm/x86.c arch/x86/pci/sta2x11-fixup.c arch/xtensa/Kconfig drivers/clk/samsung/clk-cpu.h drivers/clk/samsung/clk.h drivers/cpufreq/qcom-cpufreq-nvmem.c drivers/firmware/meson/meson_sm.c drivers/gpio/gpiolib-sysfs.h drivers/gpu/drm/panel/panel-novatek-nt35510.c drivers/hwspinlock/qcom_hwspinlock.c drivers/infiniband/hw/hns/hns_roce_mr.c drivers/iommu/iommufd/iommufd_private.h drivers/iommu/iommufd/main.c drivers/mtd/ubi/block.c drivers/mtd/ubi/eba.c drivers/mtd/ubi/fastmap-wl.c drivers/mtd/ubi/fastmap.c drivers/mtd/ubi/ubi.h drivers/mtd/ubi/wl.c drivers/net/ethernet/marvell/octeon_ep/octep_main.c drivers/net/ethernet/ti/am65-cpsw-nuss.c drivers/net/usb/r8152.c drivers/of/unittest-data/overlay_bad_unresolved.dtso drivers/soc/fsl/qe/qmc.c drivers/spi/spi-atmel.c drivers/tty/serial/sccnxp.c drivers/usb/host/fsl-mph-dr-of.c fs/ubifs/dir.c fs/ubifs/super.c include/linux/mm.h include/uapi/linux/v4l2-subdev.h kernel/bpf/helpers.c kernel/bpf/syscall.c kernel/user_namespace.c lib/stackdepot.c mm/hugetlb_vmemmap.h scripts/mod/modpost.c scripts/mod/modpost.h security/selinux/hooks.c sound/soc/codecs/cs42l43.c sound/soc/sof/sof-client.c tools/perf/Documentation/perf-lock.txt tools/perf/builtin-stat.c tools/testing/selftests/kvm/x86_64/monitor_mwait_test.c tools/testing/selftests/mm/run_vmtests.sh tools/testing/selftests/nolibc/nolibc-test.c virt/kvm/kvm_main.c

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