Re: [PATCH v9 6/7] target/arm: enable WFE sleeping for A-profile

["Alex Bennée" <alex.bennee@linaro.org>]

Thomas Huth <thuth@redhat.com> writes:

> On 24/06/2026 12.30, Alex Bennée wrote:
>> To enable full architectural behaviour for A-profile we need to do a
>> number of things:
>>    - add support for the event stream to wake things up
>>    - add support for potential trap on sleep
>>    - handle the global monitor's interactions with WFE
>>    - remove the M-profile specific gates
>  Hi Alex,
>
> this patch broke the test_arm_quanta_gsj test in
> tests/functional/arm/test_quanta_gsj.py. The test is not run by
> default, so nobody noticed. But if you run it like this:
>
>  QEMU_TEST_ALLOW_SLOW=1 QEMU_TEST_QEMU_BINARY=./qemu-system-arm ./run \
>   ~/devel/qemu/tests/functional/arm/test_quanta_gsj.py
>
> you'll notice that the test never finishes on the current master
> branch. When switching back to the commit before the "enable WFE"
> patch, the test works fine again and finishes within a minute or two
> here.
>
> Could you please have a look when you've got some spare time?

It works on my current dev tree, probably because I have:

  Message-ID: <20261012134840.1051969-1-alex.bennee@linaro.org>
  Date: Mon, 12 Oct 2026 14:48:40 +0100
  Subject: [RFC PATCH] target/arm: hold bql when SEV sets the event_register
  From: =?UTF-8?q?Alex=20Benn=C3=A9e?= <alex.bennee@linaro.org>

which needs a light re-spin when I have some spare time (sorry it's
review season so I'm trying to get them all done by EoTM).

>
>  Thanks,
>   Thomas

-- 
Alex Bennée
Virtualisation Tech Lead @ Linaro