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Re: [Qemu-devel] Hotplug vs. multifunction regression
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] Hotplug vs. multifunction regression |
Date: |
Mon, 17 Feb 2014 16:21:00 +0200 |
On Mon, Feb 17, 2014 at 07:10:51AM -0700, Alex Williamson wrote:
> [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
Yes, Igor just fixed it.
> 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
> >
>
>