[GIT PULL] LoongArch changes for v7.4

[Huacai Chen]

The following changes since commit c03c1a14507dfaf8b856c2608f9ac216021fc222:

  Linux 7.3 (2026-10-18 13:14:58 -1000)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git tags/loongarch-7.4

for you to fetch changes up to 6f8d12bb1a1231dbba579932772701880745a21d:

  soc: loongson: loongson2_guts: Use of_root instead of own reference (2026-10-28 15:09:27 +0800)

----------------------------------------------------------------
LoongArch changes for v7.4

1, Add LoongArch-specific ACPI initialization;
2, Set NX compat flag in PE/COFF efi header;
3, Use pa_to_nid()/nid_to_addrbase() rather than hard-code;
4, Detect and expose LAMCAS/DIV32 feature existence;
5, Fix and improve perf hardware breakpoints;
6, Fix and improve BPF JIT (trampoline and 32-bit operations);
7, Add arch_crash_save_vmcoreinfo() support;
8, Some bug fixes and other small changes.

----------------------------------------------------------------
Bibo Mao (3):
      ACPI: LoongArch: Add acpi_arch_[late]_init()
      ACPI: LoongArch: Add support for acpi_iommu_configure_id()
      MAINTAINERS: Add entry for drivers/acpi/loongarch

Binbin Zhou (1):
      soc: loongson: loongson2_guts: Use of_root instead of own reference

Heinrich Schuchardt (1):
      LoongArch: Set NX compat flag in PE/COFF efi header

Huacai Chen (5):
      Merge tag 'acpi-7.4-rc1' into loongarch-next
      LoongArch: Call cpu_final_simd() with pure_initcall()
      LoongArch: Don't init & online empty nodes
      LoongArch: Use pa_to_nid()/nid_to_addrbase() rather than hard-code
      soc: loongson: loongson2_pm: Fix build warnings for 32BIT

Krzysztof Kozlowski (1):
      LoongArch: dts: loongson-2k0500: Drop unsupported bus_id in DWMAC

Kumar Kartikeya Dwivedi (1):
      LoongArch: BPF: Fix stack arguments for indirect trampolines

Peng Fan (1):
      LoongArch: Use assign_bit() API where applicable

Rong Bao (1):
      LoongArch: Detect and expose LAMCAS feature existence

Tiezhu Yang (10):
      LoongArch: Detect and expose DIV32 feature existence
      LoongArch: Remove arch-specific __smp_mb__{before,after}_atomic()
      LoongArch: Remove redundant call in update_bp_registers()
      LoongArch: Fix bitmask corruption in update_bp_registers()
      LoongArch: Fix architectural naming typo for CSR_FWPS_SKIP
      LoongArch: Only send SIGTRAP signal if necessary in do_watch()
      LoongArch: Fix perf hardware breakpoint failure via installation
      LoongArch: Fix one-shot limitation for perf hardware breakpoints
      LoongArch: BPF: Clean up and decouple is32 parameter from move_imm()
      LoongArch: BPF: Optimize 32-bit operations using native instructions

Yangyang Lian (1):
      LoongArch: Add arch_crash_save_vmcoreinfo() support

 Documentation/admin-guide/kdump/vmcoreinfo.rst  |  36 +++
 MAINTAINERS                                     |   9 +
 arch/loongarch/Kconfig                          |   1 +
 arch/loongarch/boot/dts/loongson-2k0500-ref.dts |   2 -
 arch/loongarch/include/asm/barrier.h            |   3 -
 arch/loongarch/include/asm/cpu-features.h       |   2 +
 arch/loongarch/include/asm/cpu.h                |  66 ++--
 arch/loongarch/include/asm/hw_breakpoint.h      |   8 +-
 arch/loongarch/include/asm/inst.h               |   6 +
 arch/loongarch/include/asm/loongarch.h          |   7 +-
 arch/loongarch/include/asm/numa.h               |   2 +-
 arch/loongarch/include/asm/processor.h          |   1 +
 arch/loongarch/include/asm/switch_to.h          |   2 +-
 arch/loongarch/include/uapi/asm/hwcap.h         |   2 +
 arch/loongarch/kernel/Makefile                  |   1 +
 arch/loongarch/kernel/cpu-probe.c               |  10 +-
 arch/loongarch/kernel/efi-header.S              |   2 +-
 arch/loongarch/kernel/env.c                     |   5 +-
 arch/loongarch/kernel/hw_breakpoint.c           |  66 +++-
 arch/loongarch/kernel/irq.c                     |   3 +-
 arch/loongarch/kernel/numa.c                    |   8 +-
 arch/loongarch/kernel/proc.c                    |   4 +
 arch/loongarch/kernel/traps.c                   |  13 +-
 arch/loongarch/kernel/vmcore_info.c             |  22 ++
 arch/loongarch/net/bpf_jit.c                    | 391 +++++++++++++-----------
 arch/loongarch/net/bpf_jit.h                    |  25 +-
 arch/loongarch/pci/pci.c                        |   3 +-
 drivers/acpi/Kconfig                            |   4 +
 drivers/acpi/Makefile                           |   2 +-
 drivers/acpi/bus.c                              |   2 +
 drivers/acpi/loongarch/Kconfig                  |   7 +
 drivers/acpi/loongarch/Makefile                 |   3 +
 drivers/acpi/loongarch/init.c                   |  16 +
 drivers/acpi/loongarch/init.h                   |   5 +
 drivers/acpi/loongarch/iovt.c                   | 258 ++++++++++++++++
 drivers/acpi/scan.c                             |   3 +
 drivers/soc/loongson/loongson2_guts.c           |   9 +-
 drivers/soc/loongson/loongson2_pm.c             |   2 +-
 include/linux/acpi.h                            |   1 +
 include/linux/acpi_iovt.h                       |  13 +
 40 files changed, 753 insertions(+), 272 deletions(-)
 create mode 100644 arch/loongarch/kernel/vmcore_info.c
 create mode 100644 drivers/acpi/loongarch/Kconfig
 create mode 100644 drivers/acpi/loongarch/Makefile
 create mode 100644 drivers/acpi/loongarch/init.c
 create mode 100644 drivers/acpi/loongarch/init.h
 create mode 100644 drivers/acpi/loongarch/iovt.c
 create mode 100644 include/linux/acpi_iovt.h