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Re: [PATCH 06/24] armv7m: Bury unwanted "ARM,bitband-memory" devices


From: Markus Armbruster
Subject: Re: [PATCH 06/24] armv7m: Bury unwanted "ARM,bitband-memory" devices
Date: Tue, 26 May 2020 07:19:22 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux)

Peter Maydell <address@hidden> writes:

> On Mon, 25 May 2020 at 13:32, Paolo Bonzini <address@hidden> wrote:
>>
>> On 25/05/20 07:50, Markus Armbruster wrote:
>> > Peter Maydell <address@hidden> writes:
>> >
>> >> On Mon, 18 May 2020 at 06:04, Markus Armbruster <address@hidden> wrote:
>> >>> These devices are optional, and enabled by property "enable-bitband".
>> >>> armv7m_instance_init() creates them unconditionally, because the
>> >>> property has not been set then.  armv7m_realize() realizes them only
>> >>> when the property is true.  Works, although it leaves unrealized
>> >>> devices hanging around in the QOM composition tree.  Affects machines
>> >>> microbit, mps2-an505, mps2-an521, musca-a, and musca-b1.
>> >>>
>> >>> Bury the unwanted devices by making armv7m_realize() unparent them.
>> >>> Visible in "info qom-tree"; here's the change for microbit:
>> >>
>> >> What does "bury" mean here? To me it implies "they still
>> >> exist but we've stuck them in a hole somewhere and covered
>> >> them up", but the qom-tree delta suggests we've actually
>> >> really deleted them?
>> >
>> > We really delete them now.
>> >
>> > "They've been lying dead in the streets; give them a decent burial".
>> >
>> > Would you like me to s/Bury/Delete/?
>>
>> "Bury unwanted" -> "Dispose of unused"?
>
> Yeah, delete or dispose of would be clearer I think.

Okay, the subjects are short enough to accomodate a change to 'Delete
unused "..." devices'.

Thanks!




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