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Re: Guests wont start with 15 pcie-root-port devices
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From: |
Daniel P . Berrangé |
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Subject: |
Re: Guests wont start with 15 pcie-root-port devices |
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Date: |
Fri, 12 Nov 2021 17:53:42 +0000 |
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User-agent: |
Mutt/2.0.7 (2021-05-04) |
On Fri, Nov 12, 2021 at 12:35:07PM -0500, Brian Rak wrote:
> In 6.1, a guest with 15 empty pcie-root-port devices will not boot properly
> - it just hangs on "Guest has not initialized the display (yet).". As soon
> as I remove the last pcie-root-port, the guest begins starting up normally.
Yes, QEMU 6.1 has a regression
https://gitlab.com/qemu-project/qemu/-/issues/641
> commit e2a6290aab578b2170c1f5909fa556385dc0d820
> Author: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
> Date: Mon Aug 2 12:00:57 2021 +0300
>
> hw/pcie-root-port: Fix hotplug for PCI devices requiring IO
>
> Although I can't say I really understand why that commit triggered it.
It caused the firmware to always allocate I/O space for every port
and there's limited total I/O space, so it runs out at 15 devices.
Regards,
Daniel
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