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Re: [Qemu-devel] Drop support for 32bit hosts in qemu?
From: |
Daniel P . Berrangé |
Subject: |
Re: [Qemu-devel] Drop support for 32bit hosts in qemu? |
Date: |
Wed, 27 Jun 2018 14:11:17 +0100 |
User-agent: |
Mutt/1.10.0 (2018-05-17) |
On Wed, Jun 27, 2018 at 03:02:48PM +0200, Juan Quintela wrote:
> Markus Armbruster <address@hidden> wrote:
> > Thomas Huth <address@hidden> writes:
> >
> >> On 27.06.2018 08:51, Gerd Hoffmann wrote:
> > [...]
> >>> Drop support for 32bit hosts in qemu?
> >>
> >> I guess the only way to answer that question reliably is to send a patch
> >> to mark 32-bit hosts as deprecated...
> >>
> >> Anyway, you still have got to fix that problem with -m32 now somehow
> >> since we certainly can not drop 32-bit immediately.
> >
> > We certainly can if we want to.
> >
> > Our formal deprecation policy codifies our compromise between the need
> > to evolve QEMU and the need of its users for stable external interfaces.
> >
> > "Compiles on host X" is also a need, but it's a different one.
> > Evidence: "Supported build platforms" has its own appendix, separate
> > from "Deprecated features". It's mum on 32-bit hosts.
> >
> > I'm not saying we *should* drop 32-bit hosts immediately. Only that the
> > feature deprecation policy does not apply.
> >
> > Is QEMU still useful on 32-bit hosts? Honest question!
>
> At least require 32bits architectures/compilers able to use 64bit
> atomics. That leaves us with x86 (depending on compiler). And there
> haven't been 32bit x86 hosts since .....
....the most recent machine you bought, since the Intel ME is running
on some kind of i486-like CPU behind the back of your main CPU ;-P
Regards,
Daniel
--
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- Re: [Qemu-devel] Drop support for 32bit hosts in qemu? (was: [PULL 1/6] audio/hda: create millisecond timers that handle IO), (continued)
- Re: [Qemu-devel] Drop support for 32bit hosts in qemu? (was: [PULL 1/6] audio/hda: create millisecond timers that handle IO), Peter Maydell, 2018/06/27
- Re: [Qemu-devel] Drop support for 32bit hosts in qemu? (was: [PULL 1/6] audio/hda: create millisecond timers that handle IO), Dr. David Alan Gilbert, 2018/06/27
- Re: [Qemu-devel] Drop support for 32bit hosts in qemu? (was: [PULL 1/6] audio/hda: create millisecond timers that handle IO), Alex Bennée, 2018/06/27
- Re: [Qemu-devel] Drop support for 32bit hosts in qemu? (was: [PULL 1/6] audio/hda: create millisecond timers that handle IO), Alex Bennée, 2018/06/27
- Re: [Qemu-devel] Drop support for 32bit hosts in qemu? (was: [PULL 1/6] audio/hda: create millisecond timers that handle IO), Daniel P . Berrangé, 2018/06/27
- Re: [Qemu-devel] Drop support for 32bit hosts in qemu? (was: [PULL 1/6] audio/hda: create millisecond timers that handle IO), Alex Bennée, 2018/06/27
- Re: [Qemu-devel] Drop support for 32bit hosts in qemu? (was: [PULL 1/6] audio/hda: create millisecond timers that handle IO), Philippe Mathieu-Daudé, 2018/06/27
- Re: [Qemu-devel] Drop support for 32bit hosts in qemu?, Juan Quintela, 2018/06/27
- Re: [Qemu-devel] Drop support for 32bit hosts in qemu?,
Daniel P . Berrangé <=
- Re: [Qemu-devel] [PULL 1/6] audio/hda: create millisecond timers that handle IO, Gerd Hoffmann, 2018/06/27
- Re: [Qemu-devel] [PULL 1/6] audio/hda: create millisecond timers that handle IO, Paolo Bonzini, 2018/06/27
- Re: [Qemu-devel] [PULL 1/6] audio/hda: create millisecond timers that handle IO, Eric Blake, 2018/06/27
Re: [Qemu-devel] [PULL 1/6] audio/hda: create millisecond timers that handle IO, Peter Maydell, 2018/06/29
[Qemu-devel] [PULL 4/6] audio/hda: detect output buffer overruns, Gerd Hoffmann, 2018/06/25
[Qemu-devel] [PULL 5/6] audio/hda: enable new timer code by default., Gerd Hoffmann, 2018/06/25
[Qemu-devel] [PULL 6/6] audio: Convert use of atoi to qemu_strtoi, Gerd Hoffmann, 2018/06/25
Re: [Qemu-devel] [PULL 0/6] Audio 20180625 patches, Peter Maydell, 2018/06/25