Re: [PATCH v5 4/4] target/arm: Added test case for SME register exposure

[Peter Maydell <peter.maydell@linaro.org>]

On Mon, 11 Aug 2025 at 20:37, Vacha Bhavsar
<vacha.bhavsar@oss.qualcomm.com> wrote:
>
> This patch adds a test case to test SME register exposure to
> a remote gdb debugging session. This test simply sets and
> reads SME registers.
>
> Signed-off-by: Vacha Bhavsar <vacha.bhavsar@oss.qualcomm.com>
> ---
> Changes since v4:
> - this patch was not present in v4, it was added based on
> suggestions during the review of v4
> ---
>  configure                             |   6 ++
>  tests/tcg/aarch64/Makefile.target     |  23 ++++-
>  tests/tcg/aarch64/gdbstub/test-sme.py | 119 ++++++++++++++++++++++++++
>  3 files changed, 147 insertions(+), 1 deletion(-)
>  create mode 100644 tests/tcg/aarch64/gdbstub/test-sme.py

This test fails for me:

timeout -s KILL --foreground 120
/mnt/nvmedisk/linaro/qemu-from-laptop/qemu/tests/guest-debug/run-test.py
--gdb /usr/bin/gdb-multiarch --qemu
/mnt/nvmedisk/linaro/qemu-from-laptop/qemu/build/arm-clang/qemu-aarch64
--qargs "" --bin sysregs --test
/mnt/nvmedisk/linaro/qemu-from-laptop/qemu/tests/tcg/aarch64/gdbstub/test-sme.py
-- test_sme --gdb_sme_tile_support >  run-gdbstub-sysregs-sme.out
warning: File transfers from remote targets can be slow. Use "set
sysroot" to access files locally instead.
Python Exception <class 'gdb.error'>: That operation is not available
on integers of more than 8 bytes.
Error occurred in Python: That operation is not available on integers
of more than 8 bytes.
qemu-aarch64: QEMU: Terminated via GDBstub

The gdb is:
GNU gdb (Ubuntu 15.0.50.20240403-0ubuntu1) 15.0.50.20240403-git

> diff --git a/tests/tcg/aarch64/gdbstub/test-sme.py b/tests/tcg/aarch64/gdbstub/test-sme.py
> new file mode 100644
> index 0000000000..c2b9d774ae
> --- /dev/null
> +++ b/tests/tcg/aarch64/gdbstub/test-sme.py
> @@ -0,0 +1,119 @@
> +from __future__ import print_function

Alex, do we still need this line in the gdbstub test cases?
We can probably assume that the gdb's python is python 3
by now, I hope...

> +#
> +# Test the SME registers are visible and changeable via gdbstub
> +#
> +# This is launched via tests/guest-debug/run-test.py
> +#

All new files must have an SPDX line saying what the
license is. You may also wish to add a Copyright line;
that's up to you/your employer.


> +if args.gdb_sme_tile_support:
> +    main(run_test_slices, expected_arch="aarch64")
> +else:
> +    main(run_test, expected_arch="aarch64")
> \ No newline at end of file

Please add the trailing newline.

thanks
-- PMM