That's version 9 of the MTE user-space support (version 8 here [1]). The series is also available on this branch: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux for-next/mte The patches below are missing some acks. If there are any objections, please let me know (acks would be appreciated). I plan to queue them together with the rest of the MTE series. mm: [PATCH v7 07/29] mm: Add PG_arch_2 page flag [PATCH v7 08/29] mm: Preserve the PG_arch_2 flag in __split_huge_page_tail() [PATCH v7 13/29] mm: Introduce arch_calc_vm_flag_bits() fs: [PATCH v7 24/29] fs: Handle intra-page faults in copy_mount_options() arm64 KVM (small new addition in v9): [PATCH v9 04/29] arm64: kvm: mte: Hide the MTE CPUID information from the guests There have been no further ABI changes and aiming for a 5.10 merge. Minor changes in this version: - Added a separate patch for arm64 KVM which hides the CPUID information and injects an undef exception in the guest if it accesses any of the MTE system registers. - Slight improvement to the CONFIG_ARM64_AS_HAS_MTE comment. - Rebased onto v5.9-rc3. [1] https://lkml.kernel.org/r/20200824182758.27267-1-catalin.marinas@xxxxxxx Thanks. Catalin Marinas (17): arm64: mte: Use Normal Tagged attributes for the linear map arm64: kvm: mte: Hide the MTE CPUID information from the guests mm: Preserve the PG_arch_2 flag in __split_huge_page_tail() arm64: mte: Clear the tags when a page is mapped in user-space with PROT_MTE arm64: Avoid unnecessary clear_user_page() indirection arm64: mte: Tags-aware aware memcmp_pages() implementation arm64: mte: Add PROT_MTE support to mmap() and mprotect() mm: Introduce arch_validate_flags() arm64: mte: Validate the PROT_MTE request via arch_validate_flags() mm: Allow arm64 mmap(PROT_MTE) on RAM-based files arm64: mte: Allow user control of the tag check mode via prctl() arm64: mte: Allow user control of the generated random tags via prctl() arm64: mte: Restore the GCR_EL1 register after a suspend arm64: mte: Allow {set,get}_tagged_addr_ctrl() on non-current tasks arm64: mte: ptrace: Add PTRACE_{PEEK,POKE}MTETAGS support arm64: mte: ptrace: Add NT_ARM_TAGGED_ADDR_CTRL regset fs: Handle intra-page faults in copy_mount_options() Kevin Brodsky (1): mm: Introduce arch_calc_vm_flag_bits() Steven Price (4): mm: Add PG_arch_2 page flag mm: Add arch hooks for saving/restoring tags arm64: mte: Enable swap of tagged pages arm64: mte: Save tags when hibernating Vincenzo Frascino (7): arm64: mte: system register definitions arm64: mte: CPU feature detection and initial sysreg configuration arm64: mte: Add specific SIGSEGV codes arm64: mte: Handle synchronous and asynchronous tag check faults arm64: mte: Tags-aware copy_{user_,}highpage() implementations arm64: mte: Kconfig entry arm64: mte: Add Memory Tagging Extension documentation Documentation/arm64/cpu-feature-registers.rst | 2 + Documentation/arm64/elf_hwcaps.rst | 4 + Documentation/arm64/index.rst | 1 + .../arm64/memory-tagging-extension.rst | 305 ++++++++++++++++ arch/arm64/Kconfig | 33 ++ arch/arm64/include/asm/cpucaps.h | 3 +- arch/arm64/include/asm/cpufeature.h | 6 + arch/arm64/include/asm/hwcap.h | 2 +- arch/arm64/include/asm/kvm_arm.h | 3 +- arch/arm64/include/asm/memory.h | 17 +- arch/arm64/include/asm/mman.h | 56 ++- arch/arm64/include/asm/mte.h | 86 +++++ arch/arm64/include/asm/page.h | 19 +- arch/arm64/include/asm/pgtable-prot.h | 2 + arch/arm64/include/asm/pgtable.h | 46 ++- arch/arm64/include/asm/processor.h | 12 +- arch/arm64/include/asm/sysreg.h | 61 ++++ arch/arm64/include/asm/thread_info.h | 4 +- arch/arm64/include/uapi/asm/hwcap.h | 2 +- arch/arm64/include/uapi/asm/mman.h | 1 + arch/arm64/include/uapi/asm/ptrace.h | 4 + arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/cpufeature.c | 35 ++ arch/arm64/kernel/cpuinfo.c | 2 +- arch/arm64/kernel/entry.S | 37 ++ arch/arm64/kernel/hibernate.c | 118 ++++++ arch/arm64/kernel/mte.c | 336 ++++++++++++++++++ arch/arm64/kernel/process.c | 48 ++- arch/arm64/kernel/ptrace.c | 51 ++- arch/arm64/kernel/signal.c | 9 + arch/arm64/kernel/suspend.c | 4 + arch/arm64/kernel/syscall.c | 10 + arch/arm64/kvm/sys_regs.c | 16 + arch/arm64/lib/Makefile | 2 + arch/arm64/lib/mte.S | 151 ++++++++ arch/arm64/mm/Makefile | 1 + arch/arm64/mm/copypage.c | 25 +- arch/arm64/mm/dump.c | 4 + arch/arm64/mm/fault.c | 9 +- arch/arm64/mm/mmu.c | 20 +- arch/arm64/mm/mteswap.c | 83 +++++ arch/arm64/mm/proc.S | 32 +- arch/x86/kernel/signal_compat.c | 2 +- fs/namespace.c | 25 +- fs/proc/page.c | 3 + fs/proc/task_mmu.c | 4 + include/linux/kernel-page-flags.h | 1 + include/linux/mm.h | 8 + include/linux/mman.h | 23 +- include/linux/page-flags.h | 3 + include/linux/pgtable.h | 28 ++ include/trace/events/mmflags.h | 9 +- include/uapi/asm-generic/siginfo.h | 4 +- include/uapi/linux/elf.h | 1 + include/uapi/linux/prctl.h | 9 + mm/huge_memory.c | 3 + mm/mmap.c | 9 + mm/mprotect.c | 6 + mm/page_io.c | 10 + mm/shmem.c | 9 + mm/swapfile.c | 2 + mm/util.c | 2 +- tools/vm/page-types.c | 2 + 63 files changed, 1764 insertions(+), 62 deletions(-) create mode 100644 Documentation/arm64/memory-tagging-extension.rst create mode 100644 arch/arm64/include/asm/mte.h create mode 100644 arch/arm64/kernel/mte.c create mode 100644 arch/arm64/lib/mte.S create mode 100644 arch/arm64/mm/mteswap.c
