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Re: [Qemu-devel] Hotplug vs. multifunction regression
From: |
Alex Williamson |
Subject: |
Re: [Qemu-devel] Hotplug vs. multifunction regression |
Date: |
Mon, 17 Feb 2014 07:10:51 -0700 |
[cc +igor, +mst]
Appears that it's no longer possible to use multifunction devices at
PCIe at all due to hotplug being an integral part of device realization
now. Thanks,
Alex
On Sun, 2014-02-16 at 15:57 +0000, Nigel Kukard wrote:
> Hi guys,
>
> Starting from the patch series in 9f117d41 the below error is
> observed... (reverting to the patch right before it works fine a1483f88)
>
> Here is the error:
> qemu-system-x86_64: hw/pci/pcie.c:240: pcie_cap_slot_hotplug_common:
> Assertion `((pci_dev->devfn) & 0x07) == 0' failed.
>
> Here is the command that generated it...
>
> CMDLINE: $VAR1 = [
> 'qemu-system-x86_64',
> '-m',
> '8G',
> '-machine',
> 'q35',
> '-cpu',
> 'qemu64',
> '-smp',
> '4,sockets=1,cores=4,threads=1',
> '-enable-kvm',
> '-device',
>
> 'ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1',
> '-device',
>
> 'vfio-pci,host=03:00.0,bus=root.1,addr=0.0,multifunction=on,x-vga=on',
> '-device',
> 'vfio-pci,host=03:00.1,bus=root.1,addr=0.1',
> '-device',
> 'ide-drive,drive=sata-disk0,bus=ide.0',
> '-drive',
>
> 'file=510-drive_sda.qcow2,id=sata-disk0,format=qcow2,cache=writeback,if=none',
> '-vga',
> 'none',
> '-nographic',
> '-boot',
> 'menu=on',
> ];
>
> It seems the hotplug interface doesn't know how to handle multifunction
> devices.
>
> -N
>