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Re: [Qemu-devel] Drop support for 32bit hosts in qemu?

From: Thomas Huth
Subject: Re: [Qemu-devel] Drop support for 32bit hosts in qemu?
Date: Wed, 27 Jun 2018 10:09:10 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0

On 27.06.2018 09:57, Markus Armbruster 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.

Theoretically I'd agree, but actually it's more than that: If we drop
support for 32-bit hosts, we could also drop the qemu-system-i386,
qemu-system-ppc and qemu-system-arm targets, since qemu-system-x86_64,
qemu-system-ppc64 and qemu-system-aarch64 are a clear superset of these.
But that would also mean a change of the user interface, since the name
of the executable changes, and at least for ppc, there are also subtle
differences (different default machine type, different default CPU types).


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