From: Thomas Huth <thuth@redhat.com>
To: "John Paul Adrian Glaubitz" <glaubitz@physik.fu-berlin.de>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
qemu-devel@nongnu.org, "Peter Maydell" <peter.maydell@linaro.org>,
"Daniel Berrange" <berrange@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>
Cc: "Markus Armbruster" <armbru@redhat.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
qemu-arm@nongnu.org, "Maxim Levitsky" <mlevitsk@redhat.com>,
libvir-list@redhat.com,
"Richard Henderson" <richard.henderson@linaro.org>,
xen-devel@lists.xenproject.org,
"Reinoud Zandijk" <reinoud@netbsd.org>,
"Michael Tokarev" <mjt@tls.msk.ru>,
"Helge Deller" <deller@gmx.de>,
"Laurent Vivier" <lvivier@redhat.com>
Subject: Re: [PATCH v2 0/6] Deprecate support for 32-bit x86 and arm hosts
Date: Fri, 3 Mar 2023 12:22:12 +0100 [thread overview]
Message-ID: <2c7f837f-c156-8525-005f-f47d50591a85@redhat.com> (raw)
In-Reply-To: <89fd1c916b6c8094ea1a7a52396b3f91025c75c1.camel@physik.fu-berlin.de>
On 03/03/2023 12.09, John Paul Adrian Glaubitz wrote:
> Hello!
>
> On Fri, 2023-03-03 at 10:48 +0100, Thomas Huth wrote:
>> x86 ==> deprecate both, user and system emulation support on
>> 32-bit hosts
>> arm ==> deprecate only system emulation on 32-bit hosts.
>
> I would recommend against dropping support for 32-bit hosts for qemu-user
> as there are some cases where the emulation of 32-bit user code on 64-bit
> hosts does not work properly [1].
>
> Adrian
>
>> [1] https://sourceware.org/bugzilla/show_bug.cgi?id=23960
The ticket is very long and hard to read, but ... oh my, does that mean you
need to compile qemu-user in 32-bit mode on a 64-bit x86 host to properly
run 32-bit binaries from other architectures? ... uh, that's ugly ... and
sounds like bug in QEMU's user mode emulation ... and what if you're running
a distro (or different 64-bit host architecutre) that does not support
32-bit userspace libraries anymore? Then you're lost?
Thomas
next prev parent reply other threads:[~2023-03-03 11:22 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-02 16:31 [PATCH v2 0/6] Deprecate support for 32-bit x86 and arm hosts Thomas Huth
2023-03-02 16:31 ` [PATCH v2 1/6] docs/about/deprecated: Deprecate the qemu-system-i386 binary Thomas Huth
2023-03-02 18:05 ` Daniel P. Berrangé
2023-03-03 0:49 ` Wilfred Mallawa
2023-03-02 16:31 ` [PATCH v2 2/6] docs/about/deprecated: Deprecate 32-bit x86 hosts Thomas Huth
2023-03-02 18:05 ` Daniel P. Berrangé
2023-03-03 0:52 ` Wilfred Mallawa
2023-03-02 16:31 ` [PATCH v2 3/6] gitlab-ci.d/crossbuilds: Drop the i386 jobs Thomas Huth
2023-03-02 18:07 ` Daniel P. Berrangé
2023-03-03 0:53 ` Wilfred Mallawa
2023-03-02 16:31 ` [PATCH v2 4/6] docs/about/deprecated: Deprecate the qemu-system-arm binary Thomas Huth
2023-03-02 18:07 ` Daniel P. Berrangé
2023-03-02 22:16 ` Philippe Mathieu-Daudé
2023-03-03 7:36 ` Thomas Huth
2023-03-03 0:55 ` Wilfred Mallawa
2023-03-03 11:16 ` Peter Maydell
2023-03-03 11:31 ` Thomas Huth
2023-03-03 11:39 ` Daniel P. Berrangé
2023-03-02 16:31 ` [PATCH v2 5/6] docs/about/deprecated: Deprecate 32-bit arm hosts Thomas Huth
2023-03-02 18:09 ` Daniel P. Berrangé
2023-03-03 0:57 ` Wilfred Mallawa
2023-03-02 16:31 ` [PATCH v2 6/6] gitlab-ci.d/crossbuilds: Drop the 32-bit arm system emulation jobs Thomas Huth
2023-03-02 18:10 ` Daniel P. Berrangé
2023-03-02 21:58 ` Philippe Mathieu-Daudé
2023-03-03 0:57 ` Wilfred Mallawa
2023-03-02 22:07 ` [PATCH v2 0/6] Deprecate support for 32-bit x86 and arm hosts Philippe Mathieu-Daudé
2023-03-03 9:48 ` Thomas Huth
2023-03-03 11:09 ` John Paul Adrian Glaubitz
2023-03-03 11:22 ` Thomas Huth [this message]
2023-03-03 11:57 ` John Paul Adrian Glaubitz
2023-03-03 11:24 ` Peter Maydell
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