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Re: [PATCH 11/24] pnv/phb4: Bury unwanted "pnv-phb4-pec-stack" devices
From: |
Markus Armbruster |
Subject: |
Re: [PATCH 11/24] pnv/phb4: Bury unwanted "pnv-phb4-pec-stack" devices |
Date: |
Tue, 19 May 2020 13:50:27 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) |
Cédric Le Goater <address@hidden> writes:
> On 5/18/20 7:03 AM, Markus Armbruster wrote:
>> The number of stacks is controlled by property "num-stacks".
>> pnv_pec_instance_init() creates the maximum supported number, because
>> the property has not been set then. pnv_pec_realize() realizes only
>> the wanted number. Works, although it can leave unrealized devices
>> hanging around in the QOM composition tree. Affects machine powernv9.
>
> I have used this pattern in many models. Is there a better one ?
The pattern is just fine, we just need to unparent any devices that turn
out to be unwanted.
Of course, when we already know what's wanted at instance_init time,
there's no reason for creating more.