Re: [Qemu-devel] Number of usable slots in PCIe Root Port / PCIe Switch Downstream Port

2017-08-24 Thread Andrea Bolognani
On Wed, 2017-08-23 at 23:16 +0300, Marcel Apfelbaum wrote: > > Is such a configuration considered valid? > > Definitely no. > > > Or should > > libvirt and the guest OS / firmware start allowing it? > > I thought libvirt does not allow it anyway and yes, is a bug, > but considered low priority.

Re: [Qemu-devel] Number of usable slots in PCIe Root Port / PCIe Switch Downstream Port

2017-08-23 Thread Eduardo Habkost
On Wed, Aug 23, 2017 at 11:16:27PM +0300, Marcel Apfelbaum wrote: > On 23/08/2017 19:46, Andrea Bolognani wrote: > > AFAIK some PCI controllers, particularly: > > > >* PCIe Root Port (pcie-root-port, ioh3420) > >* PCIe Switch Downstream Port (xio3130-downstream) > > > > only have a single

Re: [Qemu-devel] Number of usable slots in PCIe Root Port / PCIe Switch Downstream Port

2017-08-23 Thread Marcel Apfelbaum
On 23/08/2017 19:46, Andrea Bolognani wrote: AFAIK some PCI controllers, particularly: * PCIe Root Port (pcie-root-port, ioh3420) * PCIe Switch Downstream Port (xio3130-downstream) only have a single usable slot. libvirt knows about this fact, and will prevent you from adding more than on

[Qemu-devel] Number of usable slots in PCIe Root Port / PCIe Switch Downstream Port

2017-08-23 Thread Andrea Bolognani
AFAIK some PCI controllers, particularly: * PCIe Root Port (pcie-root-port, ioh3420) * PCIe Switch Downstream Port (xio3130-downstream) only have a single usable slot. libvirt knows about this fact, and will prevent you from adding more than one device to the respective bus. However, as Luká