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Re: qdev: Regarding lazy ISA bridge creation
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From: |
Cédric Le Goater |
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Subject: |
Re: qdev: Regarding lazy ISA bridge creation |
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Date: |
Wed, 24 Mar 2021 12:38:28 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 |
On 3/24/21 12:13 PM, Philippe Mathieu-Daudé wrote:
> Hi Cédric,
>
> I'm trying to understand the comment you added in commit
> 3495b6b6101 ("ppc/pnv: add a ISA bus"):
>
> /* let isa_bus_new() create its own bridge on SysBus otherwise
> * devices specified on the command line won't find the bus and
> * will fail to create.
> */
> isa_bus = isa_bus_new(NULL, &lpc->isa_mem, &lpc->isa_io, &local_err);
>
> Do you have an example so I can reproduce?
I think this is related the IPMI BT device when using an external BMC :
https://qemu.readthedocs.io/en/latest/system/ppc/powernv.html
You could use an Aspeed machine for the remote end. But you need the
aspeed-6.0 branch for that because I did not send upstream the iBT model :
https://github.com/legoater/qemu/commit/4d2d9fe1211a25738ba5429d07a58c981845af92
C.