Re: [Qemu-devel] [RFC for 2.8 0/3] Drop support for 64 bit guests on 32 bit hosts

[Gerd Hoffmann]

On Di, 2016-08-09 at 16:55 +0100, Alex Bennée wrote:
> Hi,
> 
> I'm proposing for the 2.8 cycle we officially drop supporting 64 bit
> guests on 32 bit hosts. For most of the KVM targets it doesn't make
> any sense anyway and for TCG it makes things harder (e.g. supporting
> 64 bit atomics on a 32 bit platform). I'm not actually convinced
> things actually work if built or that anyone relies on these
> combinations. Consider these patches a way of flushing any such users
> out ;-)

Adding xen-devel to Cc.

64bit xen hypervisor with 32bit dom0 running 32bit qemu, providing
device emulation for 64bit dumUs at least used to be a common setup
years ago.  I have my doubts this is still the case in recent xen
versions, but I guess we better ask the Xen guys ...

Can anyone clarify?

thanks,
  Gerd