On 16/08/18 08:51, Jan Beulich wrote: >>>> On 16.08.18 at 08:32, <christopher.w.cl...@gmail.com> wrote: >> On Wed, Aug 15, 2018 at 11:17 PM, Juergen Gross <jgr...@suse.com> wrote: >> >>> In the Xen x86 community call we have been discussing whether anyone >>> really is depending on 32-bit PV guests. We'd like to evaluate whether >>> anyone would see problems with: >>> >>> - deprecating 32-bit PV guest support in Xen, meaning that we'd >>> eventually switch to support 32-bit PV guests only via PV-shim from >>> Xen 4.12 or 4.13 >>> >>> - dropping 32-bit PV support from upstream Linux kernel, resulting in >>> current 32-bit PV guests no longer being able to upgrade to the newest >>> kernel version any longer >>> >>> And related to that: >>> >>> - is there any Linux distribution still shipping 32-bit PV-capable >>> systems? >>> >>> - what about BSD? Is 32-bit PV support important there? >>> >> >> >> Juergen - just to be very clear about the scope here: >> * would this proposal affect the ability to use a 32-bit dom0? > > If the Dom0 is to be PV - yes, of course. For the time being there's > no complete PVH Dom0 support, so if 32-bit is needed here, PV is > for now indeed the only option.
And to be more precise: the first step would be to remove 32-bit PV support from upstream Linux kernel. This would result in the loss of the ability to use a _new_ Linux (e.g. >= 4.20 / 5.0) as a 32-bit dom0. A 32-bit dom0 using a kernel <= 4.19 would still work until we remove 32-bit PV support from the hypervisor (which we wouldn't do before full support of PVH dom0, I guess). Is there a special reason you want to use a 32-bit dom0? Juergen _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
