Dr. David Alan Gilbert <[email protected]> writes:
> * Peter Maydell ([email protected]) wrote: >> On 27 June 2018 at 09:52, Gerd Hoffmann <[email protected]> wrote: >> > Hi, >> > >> >> > Is QEMU still useful on 32-bit hosts? Honest question! >> >> >> >> I guess it depends on what 32-bit hosts you consider. If you look at only >> >> x86 vs. x86_64 then probably x86 is not that important any more but for >> >> some >> >> embedded systems/SoCs 32bit might still be common and QEMU useful for >> >> those >> >> (also as host not only emulated). >> >> I would generally agree with this. For x86 32-bit is probably >> droppable, but for non-x86 the situation is much less clear. >> >> > Well. I've used kvm with an 32bit arm soc (cubietruck). It's very >> > slow. And all the arm architecture improvements to support kvm better >> > are for aarch64 only. >> >> Cubietruck (a Cortex-A7) is a pretty slow 32-bit Arm core. >> >> Ask again in a couple of years :-) > > How about dropping support for 32 bit hosts that don't have > 64bit atomics? > That should be a much smaller set. Seems a bit harsh - we don't support MTTCG if you don't have big enough atomics, but we don't drop TCG support completely. And in fact in the case in point I don't think you could trigger a bug with emulation being single threaded and all. > > Dave > >> thanks >> -- PMM >> -- Alex Bennée
