* Laurent Vivier ([email protected]) wrote: > Le 27/06/2018 à 15:33, Philippe Mathieu-Daudé a écrit : > > On 06/27/2018 06:09 AM, Thomas Huth wrote: > >> On 27.06.2018 10:52, Gerd Hoffmann 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). > >>> > >>> 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. > >>> > >>>> Another option might be to not support audio/hda on 32bit hosts. It's not > >>>> nice either but a lot nicer than dropping support for 32bit hosts > >>>> alltogether to fix a problem in device emulation. > >>> > >>> But it also is not useful and a waste of resources to maintain 32bit > >>> host compatibility if nobody actually uses that ... > >>> > >>> For me testbuilds are the only reason to compile qemu for 32bit hosts. > >>> Since years. > >> > >> Well, while that's true for you, me and likely most of us developers, > >> you can not know whether this is also true for all users of qemu. Thus > >> this needs to be announced first for a couple of releases so that people > >> have a chance to speak up whether they still need this or not. As > >> mentioned earlier, embedded devices are often still 32-bit and I know > >> that there really are people who use QEMU on embedded devices. > >> > >> But I think we could at least announce now already that we intend to > >> drop support for 32-bit hosts in the future (maybe not in 2 releases > >> already, but, let's say in 2020? 2020 is already the EOL of Python 2, so > >> that will rule out a bunch of other legacy hosts, too). > > > > linux-user is certainly widely used on ARMv6 / ARMv7. > > > > Known user cases: > > > > - run ARMv7 binaries on ARMv6 > > - run armhf binaries on armel > > - run x86-64 binaries on ARMv7 > > > > I run i386 binaries on ARMv6.
Do you know if that model has the 64bit atomics (ldrexd/strexd)? Dave > I use it to run i386 printer driver on my raspberry Pi B+. > Brother doesn't provide the binary for ARM, neither the source. > > Thanks, > Laurent > > -- Dr. David Alan Gilbert / [email protected] / Manchester, UK
