[PATCH v5 00/31] target-arm: Implement ARMv8.5-MemTag, user mode

[Richard Henderson]

The kernel abi was finally merged into 5.10.

Changes for v5:
  * Actually include the revamp for TARGET_TAGGED_ADDRESSES,
    which got lost at some point before posting v4.

    Patches lacking review are only the new ones:
    0011-exec-Introduce-cpu_untagged_addr.patch
    0012-exec-Use-cpu_untagged_addr-in-g2h-split-out-g2h_u.patch
    0013-linux-user-Explicitly-untag-memory-management-sys.patch
    0014-linux-user-Use-guest_range_valid-in-access_ok.patch
    0015-exec-Rename-guest_-addr-range-_valid-to-_untagged.patch
    0016-linux-user-Use-cpu_untagged_addr-in-access_ok-spl.patch
    0017-linux-user-Move-lock_user-et-al-out-of-line.patch
    0018-linux-user-Fix-types-in-uaccess.c.patch
    0019-linux-user-Handle-tags-in-lock_user-unlock_user.patch

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 (31):
  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: Introduce cpu_untagged_addr
  exec: Use cpu_untagged_addr in g2h; split out g2h_untagged
  linux-user: Explicitly untag memory management syscalls
  linux-user: Use guest_range_valid in access_ok
  exec: Rename guest_{addr,range}_valid to *_untagged
  linux-user: Use cpu_untagged_addr in access_ok; split out *_untagged
  linux-user: Move lock_user et al out of line
  linux-user: Fix types in uaccess.c
  linux-user: Handle tags in lock_user/unlock_user
  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             |  39 ++--
 include/exec/exec-all.h             |   2 +-
 linux-user/aarch64/target_signal.h  |   3 +
 linux-user/aarch64/target_syscall.h |  13 ++
 linux-user/qemu.h                   |  76 +++-----
 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           |  32 +++-
 accel/tcg/user-exec.c               |  57 +++---
 bsd-user/main.c                     |   4 +-
 linux-user/aarch64/cpu_loop.c       |  38 +++-
 linux-user/elfload.c                |  18 +-
 linux-user/flatload.c               |   2 +-
 linux-user/hppa/cpu_loop.c          |  39 ++--
 linux-user/i386/cpu_loop.c          |   6 +-
 linux-user/i386/signal.c            |   5 +-
 linux-user/main.c                   |   4 +-
 linux-user/mmap.c                   |  86 +++++----
 linux-user/ppc/signal.c             |   4 +-
 linux-user/syscall.c                | 165 +++++++++++++----
 linux-user/uaccess.c                |  82 +++++++--
 target/arm/cpu.c                    |  25 ++-
 target/arm/helper-a64.c             |   4 +-
 target/arm/mte_helper.c             |  39 +++-
 target/arm/tlb_helper.c             |  15 +-
 target/arm/translate-a64.c          |  25 +--
 target/hppa/op_helper.c             |   2 +-
 target/i386/tcg/mem_helper.c        |   2 +-
 target/s390x/mem_helper.c           |   4 +-
 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 +
 42 files changed, 1126 insertions(+), 519 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