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Re: [Qemu-devel] i440/piix and dynamic sysbus check

From: Eduardo Habkost
Subject: Re: [Qemu-devel] i440/piix and dynamic sysbus check
Date: Tue, 7 Nov 2017 14:53:39 -0200
User-agent: Mutt/1.9.1 (2017-09-22)

On Tue, Nov 07, 2017 at 05:40:17PM +0100, Marc-André Lureau wrote:
> Hi,
> I am working on a TPM CRB device (last sent version:
> https://lists.gnu.org/archive/html/qemu-devel/2017-10/msg02014.html).
> It's a sysbus device, and when starting qemu with i440, I get "Option
> '-device tpm-crb' cannot be handled by this machine".
> The check comes from machine_init_notify(), checking that the machine
> has_dynamic_sysbus.
>  Apparently, q35 supports it. But not i440. If I declare
> has_dynamic_sysbus in piix, the device works fine.

Before doing that, I would like to replace has_dynamic_sysbus
with a whitelist, so we don't need to make the machine accept all
other sysbus devices too.

I probably should rebase and resubmit this RFC:
Subject: [Qemu-devel] [RFC 0/4] Replace has_dynamic_sysbus with device type  

> Marcel, could we do something similar to piix to what you did for q35?:
> commit bf8d492405feaee2c1685b3b9d5e03228ed3e47f
> Author: Marcel Apfelbaum <address@hidden>
> Date:   Mon Jun 27 18:38:33 2016 +0300
>     q35: allow dynamic sysbus
> thanks
> -- 
> Marc-André Lureau


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