Re: [Qemu-devel] Hotplug vs. multifunction regression

[Alex Williamson]

[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
>