Esteemed kvm developers! I've been trying to debug this bug
https://bugs.launchpad.net/ubuntu/+source/kvm/+bug/219165 It originally revealed itself by failing to run grub (which is a 32 bit binary) when installing Ubuntu from our live cd. It turned out to be a more general problem of 32 bit binaries failing to run. The server install worked like a charm. I eventually discovered that loading the vmmouse driver triggered it and narrowed it down to the call to kvm_load_registers in vmport_ioport_read. We're releasing on Thursday, and I needed a quick fix, so I reverted the calls to kvm_{save,load}_registers in vmport_ioport_read to the old code that simply saved the eax, ebx, ecx, edx, esi, and edi registers, but I'm supposing kvm_{load,save}_registers really should work here. I dug a bit further into the code and tried disabling various pieces of the kvm_load_registers until it finally worked again. The problem seems to only arise when the lstar msr is loaded. I've looked at the code, but seeing as three days ago I didn't know there was such a thing as an lstar msr, I'm finding myself getting stuck. :) Any pointers in the right direction would be lovely. -- Soren Hansen | Virtualisation specialist | Ubuntu Server Team Canonical Ltd. | http://www.ubuntu.com/
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