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Re: [RFC PATCH v2 00/16] Initial support for machine creation via QMP

From: Philippe Mathieu-Daudé
Subject: Re: [RFC PATCH v2 00/16] Initial support for machine creation via QMP
Date: Wed, 22 Sep 2021 19:50:22 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0

Hi Damien,

On 9/22/21 18:13, Damien Hedde wrote:

The goal of this work is to bring dynamic machine creation to QEMU:
we want to setup a machine without compiling a specific machine C
code. It would ease supporting highly configurable platforms (for
example resulting from an automated design flow). The requirements
for such configuration include begin able to specify the number of
cores, available peripherals, emmory mapping, IRQ mapping, etc.

This series focuses on the first step: populating a machine with
devices during its creation. We propose patches to support this
using QMP commands. This is a working set of patches and improves
over the earlier rfc (posted in May):

Do you have a roadmap for the following steps? Or are you done with
this series?

Yesterday I was thinking about this, and one thing I was wondering is
if it would be possible to have DeviceClass and MachineClass implement
a populate_fdt() handler, to automatically generate custom DTB for these
custom machines.

Maybe in your case you don't need that, as your framework generating the
QEMU machine also generates the DTB, or even parse a DTB to generate the
machine... :)



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