----- Original Message ----- > From: "Radim Krčmář" <rkrc...@redhat.com> > To: "Paolo Bonzini" <pbonz...@redhat.com> > Cc: qemu-devel@nongnu.org, "Peter Xu" <pet...@redhat.com>, "Igor Mammedov" > <imamm...@redhat.com>, "Richard Henderson" > <r...@twiddle.net>, "Eduardo Habkost" <ehabk...@redhat.com>, "Michael S. > Tsirkin" <m...@redhat.com> > Sent: Tuesday, September 27, 2016 4:01:39 PM > Subject: Re: [PATCH 5/5] intel_iommu: do not allow EIM without KVM support > > 2016-09-23 11:27+0200, Paolo Bonzini: > > Since the whole IOMMU feature is new and somewhat experimental, I think > > it's okay to just make EIM the default for >=2.8 machine types if KVM is > > on (using DEFINE_PROP_ON_OFF_AUTO; auto means true if KVM is on and > > Sounds good.
BTW this also means KVM+vIOMMU requires 4.8. Let's remember to document it in the release notes. > > false otherwise, and pc-2.7 would set eim=off). > > What about eim=on in pc-2.7, to avoid breaking migration? Yup, just a thinko. Paolo
