On Fri, 23 Sep 2022 21:27:08 -0400 Peter Xu <pet...@redhat.com> wrote:
> On Fri, Sep 23, 2022 at 06:03:44PM -0400, Peter Xu wrote: > > On Fri, Sep 23, 2022 at 10:41:59AM +0200, Igor Mammedov wrote: > > > It's worth putting history excavation with explanation what is broken and > > > why > > > compat stuff is being ignored in the patch. > > > > Makes sense, I'll amend the commit message and repost. Thanks, > > There's actually one way to slightly remedy this single case, mostly for > any QEMU 7.1.0 user with -smp <=8 and the intel iommu (as 77250171bdc02 is > merged only in 7.1.0). > > We can have one compact parameter x-eim-enable-kvm-x2apic, setting it "on" > by default, "off" for 7.1, and "on" for 7.0-. > > I'm not very sure whether that'll worth it. Any thoughts? How it (enabling x2apic API) would affect kvm/guests running with 8 or less CPUs and with intel iommu + remapping? >
