[Qemu-discuss] PCI device limit?

[Scott Sullivan]

Hello,

I am using QEMU 1.7.0. With this version, I am able to add up to 32 PCI 
devices. If I attempt to add anything more, my VMs QEMU process shuts 
itself down shortly after I select the kernel to boot in Grub.

Per this page:

http://wiki.qemu.org/Features/PCIBridgeHotplug#Roadmap

It sounds like I need to start QEMU with "-M 1.6" ? However that appears 
to be an invalid option to qemu-system-x86_64. What's curious, is that 
on old QEMU-KVM, I am able to add all the way up to 52 PCI devices 
(virtio disks) without any issues. Is there something I need to do on 
QEMU to enable the PCI bridge? In the test scenario, the arguments given 
to QEMU and QEMU-KVM were the same.