The following changes since commit 50fd82b3a9a9335df5d50c7ddcb81c81d358c4fc: Merge tag 'docs-5.19-2' of git://git.lwn.net/linux (2022-06-02 15:36:06 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git tags/loongarch-5.19 for you to fetch changes up to 8be4493119b0aedf7dd61e1ca520fb398537b53e: MAINTAINERS: Add maintainer information for LoongArch (2022-06-03 20:09:29 +0800) [ Side note: All the contents in this branch look fine to me and I think we are better off with them in 5.19 than later, mainly because it allows merging the glibc port sooner. On the other hand, the way here has been somewhat irregular and rushed, and as explained in the tag it doesn't actually boot. If you have any doubts about the submission, it can obviously wait for another release and get done properly then. - Arnd ] ---------------------------------------------------------------- Add partial Loongarch architecture code This is the majority of the loongarch architecture code, including the final system call interface and all core functionality. It still misses three sets of peripheral but vital patches to add support for other subsystems, which have yet to pass review: - The drivers/firmware/efi stub for booting from a standard UEFI firmware implementation. Both the original custom boot interface and a draft implementation of the EFI stub did not make it, so it is currently impossible to boot the kernel, until the loongarch specific portions get accepted into the UEFI subsystem - The drivers/irqchip/irq-loongson-*.c drivers are shared with the MIPS port, but currently lack support for ACPI based booting, which will get merged through the irqchip subsystem. - Similarly, the drivers/pci/controller/pci-loongson.c needs to be modified for ACPI support, which will be merged through the PCI subsystem. While the port cannot actually be used before all the above are merged, having it in 5.19 helps to establish the user space ABI for the libc ports to build on, and to help any treewide changes in the mainline kernel get applied here as well. A gcc-12 based tool chains for build testing is now included in https://mirrors.edge.kernel.org/pub/tools/crosstool/. Original description from Huacai Chen at https://lore.kernel.org/lkml/20220603072053.35005-1-chenhuacai@xxxxxxxxxxx/: "LoongArch is a new RISC ISA, which is a bit like MIPS or RISC-V. LoongArch includes a reduced 32-bit version (LA32R), a standard 32-bit version (LA32S) and a 64-bit version (LA64). LoongArch use ACPI as its boot protocol LoongArch-specific interrupt controllers (similar to APIC) are already added in the next revision of ACPI Specification (current revision is 6.4). This patchset is adding basic LoongArch support in mainline kernel, we can see a complete snapshot here: https://github.com/loongson/linux/tree/loongarch-next https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git/log/?h=loongarch-next Cross-compile tool chain to build kernel: https://github.com/loongson/build-tools/releases/download/2021.12.21/loongarch64-clfs-2022-03-03-cross-tools-gcc-glibc.tar.xz A CLFS-based Linux distro: https://github.com/loongson/build-tools/releases/download/2021.12.21/loongarch64-clfs-system-2022-03-03.tar.bz2 Open-source tool chain which is under review (Binutils and Gcc are already upstream): https://github.com/loongson/binutils-gdb/tree/upstream_v3.1 https://github.com/loongson/gcc/tree/loongarch_upstream_v6.3 https://github.com/loongson/glibc/tree/loongarch_2_35_dev_v2.2 Loongson and LoongArch documentations: https://github.com/loongson/LoongArch-Documentation LoongArch-specific interrupt controllers: https://mantis.uefi.org/mantis/view.php?id=2203 https://mantis.uefi.org/mantis/view.php?id=2313"; ---------------------------------------------------------------- Huacai Chen (24): irqchip: Adjust Kconfig for Loongson irqchip/loongson-liointc: Fix build error for LoongArch Documentation: LoongArch: Add basic documentations Documentation/zh_CN: Add basic LoongArch documentations LoongArch: Add ELF-related definitions LoongArch: Add writecombine support for drm LoongArch: Add build infrastructure LoongArch: Add CPU definition headers LoongArch: Add atomic/locking headers LoongArch: Add other common headers LoongArch: Add boot and setup routines LoongArch: Add exception/interrupt handling LoongArch: Add process management LoongArch: Add memory management LoongArch: Add system call support LoongArch: Add signal handling support LoongArch: Add ELF and module support LoongArch: Add misc common routines LoongArch: Add some library functions LoongArch: Add VDSO and VSYSCALL support LoongArch: Add multi-processor (SMP) support LoongArch: Add Non-Uniform Memory Access (NUMA) support LoongArch: Add Loongson-3 default config file MAINTAINERS: Add maintainer information for LoongArch Documentation/arch.rst | 1 + Documentation/loongarch/features.rst | 3 + Documentation/loongarch/index.rst | 21 + Documentation/loongarch/introduction.rst | 387 +++++ Documentation/loongarch/irq-chip-model.rst | 156 ++ Documentation/translations/zh_CN/index.rst | 1 + .../translations/zh_CN/loongarch/features.rst | 8 + .../translations/zh_CN/loongarch/index.rst | 26 + .../translations/zh_CN/loongarch/introduction.rst | 351 +++++ .../zh_CN/loongarch/irq-chip-model.rst | 155 ++ MAINTAINERS | 10 + arch/loongarch/Kbuild | 6 + arch/loongarch/Kconfig | 438 ++++++ arch/loongarch/Kconfig.debug | 0 arch/loongarch/Makefile | 100 ++ arch/loongarch/boot/.gitignore | 2 + arch/loongarch/boot/Makefile | 16 + arch/loongarch/boot/dts/Makefile | 4 + arch/loongarch/configs/loongson3_defconfig | 771 ++++++++++ arch/loongarch/include/asm/Kbuild | 30 + arch/loongarch/include/asm/acenv.h | 18 + arch/loongarch/include/asm/acpi.h | 38 + arch/loongarch/include/asm/addrspace.h | 112 ++ arch/loongarch/include/asm/asm-offsets.h | 5 + arch/loongarch/include/asm/asm-prototypes.h | 7 + arch/loongarch/include/asm/asm.h | 191 +++ arch/loongarch/include/asm/asmmacro.h | 289 ++++ arch/loongarch/include/asm/atomic.h | 362 +++++ arch/loongarch/include/asm/barrier.h | 159 ++ arch/loongarch/include/asm/bitops.h | 33 + arch/loongarch/include/asm/bitrev.h | 34 + arch/loongarch/include/asm/bootinfo.h | 43 + arch/loongarch/include/asm/branch.h | 21 + arch/loongarch/include/asm/bug.h | 23 + arch/loongarch/include/asm/cache.h | 13 + arch/loongarch/include/asm/cacheflush.h | 80 ++ arch/loongarch/include/asm/cacheops.h | 37 + arch/loongarch/include/asm/clocksource.h | 12 + arch/loongarch/include/asm/cmpxchg.h | 123 ++ arch/loongarch/include/asm/compiler.h | 15 + arch/loongarch/include/asm/cpu-features.h | 73 + arch/loongarch/include/asm/cpu-info.h | 116 ++ arch/loongarch/include/asm/cpu.h | 127 ++ arch/loongarch/include/asm/cpufeature.h | 24 + arch/loongarch/include/asm/delay.h | 26 + arch/loongarch/include/asm/dma-direct.h | 11 + arch/loongarch/include/asm/dmi.h | 24 + arch/loongarch/include/asm/efi.h | 41 + arch/loongarch/include/asm/elf.h | 301 ++++ arch/loongarch/include/asm/entry-common.h | 13 + arch/loongarch/include/asm/exec.h | 10 + arch/loongarch/include/asm/fb.h | 23 + arch/loongarch/include/asm/fixmap.h | 13 + arch/loongarch/include/asm/fpregdef.h | 53 + arch/loongarch/include/asm/fpu.h | 129 ++ arch/loongarch/include/asm/futex.h | 108 ++ arch/loongarch/include/asm/hardirq.h | 26 + arch/loongarch/include/asm/hugetlb.h | 83 ++ arch/loongarch/include/asm/hw_irq.h | 17 + arch/loongarch/include/asm/idle.h | 9 + arch/loongarch/include/asm/inst.h | 117 ++ arch/loongarch/include/asm/io.h | 129 ++ arch/loongarch/include/asm/irq.h | 132 ++ arch/loongarch/include/asm/irq_regs.h | 27 + arch/loongarch/include/asm/irqflags.h | 78 + arch/loongarch/include/asm/kdebug.h | 23 + arch/loongarch/include/asm/linkage.h | 36 + arch/loongarch/include/asm/local.h | 138 ++ arch/loongarch/include/asm/loongarch.h | 1516 ++++++++++++++++++++ arch/loongarch/include/asm/loongson.h | 153 ++ arch/loongarch/include/asm/mmu.h | 16 + arch/loongarch/include/asm/mmu_context.h | 152 ++ arch/loongarch/include/asm/mmzone.h | 18 + arch/loongarch/include/asm/module.h | 80 ++ arch/loongarch/include/asm/module.lds.h | 7 + arch/loongarch/include/asm/numa.h | 67 + arch/loongarch/include/asm/page.h | 115 ++ arch/loongarch/include/asm/percpu.h | 214 +++ arch/loongarch/include/asm/perf_event.h | 10 + arch/loongarch/include/asm/pgalloc.h | 103 ++ arch/loongarch/include/asm/pgtable-bits.h | 131 ++ arch/loongarch/include/asm/pgtable.h | 565 ++++++++ arch/loongarch/include/asm/prefetch.h | 29 + arch/loongarch/include/asm/processor.h | 209 +++ arch/loongarch/include/asm/ptrace.h | 152 ++ arch/loongarch/include/asm/reboot.h | 10 + arch/loongarch/include/asm/regdef.h | 41 + arch/loongarch/include/asm/seccomp.h | 20 + arch/loongarch/include/asm/serial.h | 11 + arch/loongarch/include/asm/setup.h | 21 + arch/loongarch/include/asm/shmparam.h | 12 + arch/loongarch/include/asm/smp.h | 124 ++ arch/loongarch/include/asm/sparsemem.h | 23 + arch/loongarch/include/asm/stackframe.h | 219 +++ arch/loongarch/include/asm/stacktrace.h | 74 + arch/loongarch/include/asm/string.h | 12 + arch/loongarch/include/asm/switch_to.h | 37 + arch/loongarch/include/asm/syscall.h | 74 + arch/loongarch/include/asm/thread_info.h | 106 ++ arch/loongarch/include/asm/time.h | 50 + arch/loongarch/include/asm/timex.h | 33 + arch/loongarch/include/asm/tlb.h | 180 +++ arch/loongarch/include/asm/tlbflush.h | 48 + arch/loongarch/include/asm/topology.h | 41 + arch/loongarch/include/asm/types.h | 19 + arch/loongarch/include/asm/uaccess.h | 269 ++++ arch/loongarch/include/asm/unistd.h | 11 + arch/loongarch/include/asm/vdso.h | 38 + arch/loongarch/include/asm/vdso/clocksource.h | 8 + arch/loongarch/include/asm/vdso/gettimeofday.h | 99 ++ arch/loongarch/include/asm/vdso/processor.h | 14 + arch/loongarch/include/asm/vdso/vdso.h | 30 + arch/loongarch/include/asm/vdso/vsyscall.h | 27 + arch/loongarch/include/asm/vermagic.h | 19 + arch/loongarch/include/asm/vmalloc.h | 4 + arch/loongarch/include/uapi/asm/Kbuild | 2 + arch/loongarch/include/uapi/asm/auxvec.h | 17 + arch/loongarch/include/uapi/asm/bitsperlong.h | 9 + arch/loongarch/include/uapi/asm/break.h | 23 + arch/loongarch/include/uapi/asm/byteorder.h | 13 + arch/loongarch/include/uapi/asm/hwcap.h | 20 + arch/loongarch/include/uapi/asm/ptrace.h | 52 + arch/loongarch/include/uapi/asm/reg.h | 59 + arch/loongarch/include/uapi/asm/sigcontext.h | 44 + arch/loongarch/include/uapi/asm/signal.h | 13 + arch/loongarch/include/uapi/asm/ucontext.h | 35 + arch/loongarch/include/uapi/asm/unistd.h | 5 + arch/loongarch/kernel/.gitignore | 2 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arch/loongarch/kernel/reset.c | 102 ++ arch/loongarch/kernel/setup.c | 374 +++++ arch/loongarch/kernel/signal.c | 566 ++++++++ arch/loongarch/kernel/smp.c | 751 ++++++++++ arch/loongarch/kernel/switch.S | 35 + arch/loongarch/kernel/syscall.c | 63 + arch/loongarch/kernel/time.c | 214 +++ arch/loongarch/kernel/topology.c | 52 + arch/loongarch/kernel/traps.c | 725 ++++++++++ arch/loongarch/kernel/vdso.c | 138 ++ arch/loongarch/kernel/vmlinux.lds.S | 120 ++ arch/loongarch/lib/Makefile | 6 + arch/loongarch/lib/clear_user.S | 43 + arch/loongarch/lib/copy_user.S | 47 + arch/loongarch/lib/delay.c | 43 + arch/loongarch/lib/dump_tlb.c | 111 ++ arch/loongarch/mm/Makefile | 9 + arch/loongarch/mm/cache.c | 141 ++ arch/loongarch/mm/extable.c | 22 + arch/loongarch/mm/fault.c | 261 ++++ arch/loongarch/mm/hugetlbpage.c | 87 ++ arch/loongarch/mm/init.c | 178 +++ arch/loongarch/mm/ioremap.c | 27 + arch/loongarch/mm/maccess.c | 10 + arch/loongarch/mm/mmap.c | 125 ++ arch/loongarch/mm/page.S | 84 ++ arch/loongarch/mm/pgtable.c | 130 ++ arch/loongarch/mm/tlb.c | 305 ++++ arch/loongarch/mm/tlbex.S | 546 +++++++ arch/loongarch/pci/Makefile | 7 + arch/loongarch/vdso/.gitignore | 2 + arch/loongarch/vdso/Makefile | 96 ++ arch/loongarch/vdso/elf.S | 15 + arch/loongarch/vdso/gen_vdso_offsets.sh | 13 + arch/loongarch/vdso/sigreturn.S | 24 + arch/loongarch/vdso/vdso.S | 22 + arch/loongarch/vdso/vdso.lds.S | 72 + arch/loongarch/vdso/vgettimeofday.c | 25 + drivers/gpu/drm/drm_vm.c | 2 +- drivers/gpu/drm/ttm/ttm_module.c | 2 +- drivers/irqchip/Kconfig | 6 +- drivers/irqchip/irq-loongson-liointc.c | 6 +- include/drm/drm_cache.h | 8 + include/linux/cpuhotplug.h | 1 + include/uapi/linux/audit.h | 2 + include/uapi/linux/elf-em.h | 1 + include/uapi/linux/elf.h | 5 + include/uapi/linux/kexec.h | 1 + scripts/sorttable.c | 5 + scripts/subarch.include | 2 +- tools/include/uapi/asm/bitsperlong.h | 2 + 204 files changed, 21064 insertions(+), 7 deletions(-) create mode 100644 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