Version 1 was back in October:
https://patchew.org/QEMU/20191015163254.12041-1-richard.henderson@linaro.org/

Although that post claims there was an actual v1 in March 2019,
I can't locate it, so... whatever.

This version -- call it 2 -- is the first attempt to implement the
actual in-progress kernel abi, rather than making up a private abi:

https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=devel/mte-v4

Based-on: 20200603011317.473934-1-richard.henderson@linaro.org
("target/arm: Implement ARMv8.5-MemTag, system mode")
Based-on: 20200520172800.8499-1-richard.henderson@linaro.org
("linux-user: User support for AArch64 BTI")

The full tree is available at:
https://github.com/rth7680/qemu/tree/tgt-arm-mte-user


r~


Richard Henderson (17):
  tcg: Introduce target-specific page data for user-only
  linux-user: Introduce PAGE_ANON
  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
  linux-user/aarch64: Implement PR_MTE_TCF and PR_MTE_TAG
  linux-user/aarch64: Implement PROT_MTE
  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              | 23 ++++++---
 include/exec/cpu_ldst.h             | 40 +++++++++++-----
 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 ++
 tests/tcg/aarch64/mte.h             | 54 +++++++++++++++++++++
 accel/tcg/translate-all.c           | 28 +++++++++++
 bsd-user/main.c                     |  5 ++
 linux-user/aarch64/cpu_loop.c       | 60 +++++++++++++++++++-----
 linux-user/main.c                   |  5 ++
 linux-user/mmap.c                   | 28 +++++++----
 linux-user/syscall.c                | 73 ++++++++++++++++++++++++++++-
 target/arm/cpu.c                    | 17 +++++++
 target/arm/mte_helper.c             | 39 ++++++++++++++-
 target/arm/tlb_helper.c             | 27 ++++++++---
 tests/tcg/aarch64/mte-1.c           | 25 ++++++++++
 tests/tcg/aarch64/mte-2.c           | 42 +++++++++++++++++
 tests/tcg/aarch64/mte-3.c           | 47 +++++++++++++++++++
 tests/tcg/aarch64/Makefile.target   |  4 ++
 22 files changed, 502 insertions(+), 63 deletions(-)
 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

-- 
2.25.1

On Fri, 5 Jun 2020 at 05:17, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Version 1 was back in October:
> https://patchew.org/QEMU/20191015163254.12041-1-richard.henderson@linaro.org/
>
> Although that post claims there was an actual v1 in March 2019,
> I can't locate it, so... whatever.
>
> This version -- call it 2 -- is the first attempt to implement the
> actual in-progress kernel abi, rather than making up a private abi:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=devel/mte-v4
>
> Based-on: 20200603011317.473934-1-richard.henderson@linaro.org
> ("target/arm: Implement ARMv8.5-MemTag, system mode")
> Based-on: 20200520172800.8499-1-richard.henderson@linaro.org
> ("linux-user: User support for AArch64 BTI")
>
> The full tree is available at:
> https://github.com/rth7680/qemu/tree/tgt-arm-mte-user

I've reviewed most of this series; the later parts look ok
but they're implementations of an ABI that hasn't yet gone
into the kernel so I haven't bothered to look closely at the
details.

thanks
-- PMM