Re: [libvirt] [PATCHv3 6/6] qemu: process: Validate specific CPUID flags of a guest

On Mon, Nov 04, 2013 at 14:55:07 +0100, Peter Krempa wrote: > When starting a VM the qemu process may filter out some requested > features of a domain as it's not supported either by the host or by > qemu. Libvirt didn't check if this happened which might end up in > changing of the guest ABI when migrating. > > The proof of concept implementation adds the check for the recently > introduced kvm_pv_unhalt cpuid feature bit. This feature depends on both > qemu and host kernel support and thus increase the possibility of guest > ABI breakage. > --- > > Notes: > Version 3: > - monitor code is now called only on the correct arch to avoid spurious errors in log > > Version 2: > - adapted to previous changes > > src/qemu/qemu_process.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 46 insertions(+) ACK Jirka