On Thu, Aug 07, 2014 at 12:18:49PM +0100, Peter Maydell wrote: > you didn't select a 32 bit CPU either explicitly or by default > on the QEMU command line? Note that '-machine type=virt' > defaults to a Cortex-A15 even in qemu-softmmu-aarch64 > (this is unfortunate but fallout from the fact that we started > the virt model with the A15. Maybe we should make it not > have a default and require a CPU specification...)
Yes, this is indeed the case. It also explains why I could get TCG working at all until I added -cpu cortex-a57. Now it is working. I really think this choice of cpu_model = "cortex-a15" for -M virt is a poor one. It should always default to something working. Currently libguestfs has to pass -cpu host when KVM is detected, and -cpu cortex-a57 otherwise. However we cannot be sure that KVM is 100% working and that we won't fall back to TCG, which means the -cpu parameter could be wrong and we would fail to launch the appliance. Having the correct defaults would prevent this unnecessary failure. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://people.redhat.com/~rjones/virt-df/
