From: "Daniel P. Berrangé" <berrange@redhat.com>
To: brak@gameservers.com
Cc: qemu-devel <qemu-devel@nongnu.org>
Subject: Re: Guests wont start with 15 pcie-root-port devices
Date: Fri, 12 Nov 2021 17:53:42 +0000 [thread overview]
Message-ID: <YY6qJt0lXEc2SAtc@redhat.com> (raw)
In-Reply-To: <abff2095-9ac8-c115-bc7f-6a19b9defe51@gameservers.com>
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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next prev parent reply other threads:[~2021-11-12 17:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-12 17:35 Guests wont start with 15 pcie-root-port devices Brian Rak
2021-11-12 17:53 ` Daniel P. Berrangé [this message]
2021-11-12 20:51 ` Igor Mammedov
2021-11-15 16:57 ` Brian Rak
2021-11-16 19:41 ` Igor Mammedov
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