On 06/10/2017 23:52, Eduardo Habkost wrote: > The default set of KVM CPU features require the host kernel to > support them. KVM_PV_EOI is the newest one, and was included on > Linux v3.6 (Linux commit ae7a2a3f). > > Running on an old host might break management software > expectations because the latest machine-type won't be runnable > while older machine-types might be runnable. Document v3.6 as > the minimum kernel version for KVM on x86_64. > > Signed-off-by: Eduardo Habkost <ehabk...@redhat.com> > --- > qemu-doc.texi | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/qemu-doc.texi b/qemu-doc.texi > index ecd186a159..be45b6b6f6 100644 > --- a/qemu-doc.texi > +++ b/qemu-doc.texi > @@ -37,6 +37,7 @@ > * QEMU System emulator for non PC targets:: > * QEMU Guest Agent:: > * QEMU User space emulator:: > +* System requirements:: > * Implementation notes:: > * Deprecated features:: > * License:: > @@ -2348,6 +2349,14 @@ Act as if the host page size was 'pagesize' bytes > Run the emulation in single step mode. > @end table > > +@node System requirements > +@chapter System requirements > + > +@section KVM kernel module > + > +On x86_64 hosts, the default set of CPU features enabled by the KVM > accelerator > +require the host to be running Linux v3.6 or newer. > + > > @include qemu-tech.texi > >
Maybe we should expand on the consequences of running on older versions? Paolo
