[PATCH v4 00/23] target-arm: Implement ARMv8.5-MemTag, user mode

[Richard Henderson]

The kernel abi was finally merged into 5.10.

Changes for v4:
  * Revamp "Add support for TARGET_TAGGED_ADDRESSES".  There are now two
    sets of functions in include/exec/, one for tagged and one for
    untagged addresses.  The former takes a CPUState, and does not
    assume current_cpu is a thing.  So much for the generic bits...
    However, use of current_cpu remains, pushed down to lock_user.
    Changing everything that touches that, or get/put_user, is daunting.
  * Fix tbi0 vs tbi1 for linux-user.
    This had a number of cascading effects.
  * Adjust when async errors are noticed.

Changes for v3:
  * Split out type changes to separate patches.
  * Add doc comments; tweak alloc so that the !PAGE_VALID case is clear.
  * Do not overlap PAGE_TARGET_2 with PAGE_RESERVED.
  * Use syndrome.h, arm_deliver_fault.


r~


Richard Henderson (23):
  tcg: Introduce target-specific page data for user-only
  linux-user: Introduce PAGE_ANON
  exec: Use uintptr_t for guest_base
  exec: Use uintptr_t in cpu_ldst.h
  exec: Improve types for guest_addr_valid
  linux-user: Check for overflow in access_ok
  linux-user: Tidy VERIFY_READ/VERIFY_WRITE
  bsd-user: Tidy VERIFY_READ/VERIFY_WRITE
  linux-user: Do not use guest_addr_valid for h2g_valid
  linux-user: Fix guest_addr_valid vs reserved_va
  exec: Add support for TARGET_TAGGED_ADDRESSES
  linux-user/aarch64: Implement PR_TAGGED_ADDR_ENABLE
  target/arm: Improve gen_top_byte_ignore
  target/arm: Use the proper TBI settings for linux-user
  linux-user/aarch64: Implement PR_MTE_TCF and PR_MTE_TAG
  linux-user/aarch64: Implement PROT_MTE
  target/arm: Split out syndrome.h from internals.h
  linux-user/aarch64: Pass syndrome to EXC_*_ABORT
  linux-user/aarch64: Signal SEGV_MTESERR for sync tag check fault
  linux-user/aarch64: Signal SEGV_MTEAERR for async tag check error
  target/arm: Add allocation tag storage for user mode
  target/arm: Enable MTE for user-only
  tests/tcg/aarch64: Add mte smoke tests

 bsd-user/qemu.h                     |   9 +-
 include/exec/cpu-all.h              |  47 ++++-
 include/exec/cpu_ldst.h             |  42 +++--
 linux-user/aarch64/target_signal.h  |   3 +
 linux-user/aarch64/target_syscall.h |  13 ++
 linux-user/qemu.h                   |  19 +-
 linux-user/syscall_defs.h           |   1 +
 target/arm/cpu-param.h              |   3 +
 target/arm/cpu.h                    |  32 ++++
 target/arm/internals.h              | 249 +------------------------
 target/arm/syndrome.h               | 273 ++++++++++++++++++++++++++++
 tests/tcg/aarch64/mte.h             |  60 ++++++
 accel/tcg/translate-all.c           |  28 +++
 bsd-user/main.c                     |   4 +-
 linux-user/aarch64/cpu_loop.c       |  38 +++-
 linux-user/elfload.c                |   4 +-
 linux-user/main.c                   |   4 +-
 linux-user/mmap.c                   |  29 ++-
 linux-user/syscall.c                |  71 +++++++-
 target/arm/cpu.c                    |  25 ++-
 target/arm/mte_helper.c             |  39 +++-
 target/arm/tlb_helper.c             |  15 +-
 target/arm/translate-a64.c          |  25 +--
 tests/tcg/aarch64/mte-1.c           |  28 +++
 tests/tcg/aarch64/mte-2.c           |  45 +++++
 tests/tcg/aarch64/mte-3.c           |  51 ++++++
 tests/tcg/aarch64/mte-4.c           |  45 +++++
 tests/tcg/aarch64/pauth-2.c         |   1 -
 tests/tcg/aarch64/Makefile.target   |   6 +
 tests/tcg/configure.sh              |   4 +
 30 files changed, 888 insertions(+), 325 deletions(-)
 create mode 100644 target/arm/syndrome.h
 create mode 100644 tests/tcg/aarch64/mte.h
 create mode 100644 tests/tcg/aarch64/mte-1.c
 create mode 100644 tests/tcg/aarch64/mte-2.c
 create mode 100644 tests/tcg/aarch64/mte-3.c
 create mode 100644 tests/tcg/aarch64/mte-4.c

-- 
2.25.1