From: Richard Henderson <richard.henderson@linaro.org>
To: Paolo Bonzini <pbonzini@redhat.com>,
qemu-devel@nongnu.org,
Stefano Stabellini <sstabellini@kernel.org>
Cc: mark.cave-ayland@ilande.co.uk, berrange@redhat.com,
philmd@linaro.org, thuth@redhat.com
Subject: Re: [PATCH v2 00/14] meson: Deprecate 32-bit host support
Date: Mon, 3 Feb 2025 13:55:36 -0800 [thread overview]
Message-ID: <e40c39d4-425c-4566-af41-373941894045@linaro.org> (raw)
In-Reply-To: <467a5a58-952e-4930-8e91-744eda6d87d9@redhat.com>
On 2/3/25 04:54, Paolo Bonzini wrote:
> On 2/3/25 04:18, Richard Henderson wrote:
>> v1: 20250128004254.33442-1-richard.henderson@linaro.org
>>
>> For v2, immediately disable 64-on-32 TCG.
>>
>> I *suspect* that we should disable 64-on-32 for *all* accelerators.
>> The idea that an i686 binary on an x86_64 host may be used to spawn
>> an x86_64 guest via kvm is silly and a bit more than niche.
>
> At least Xen used to be commonly used with 32-bit dom0, because it saved memory and dom0
> would map in guest buffers as needed. I'm not sure how common that is these days, perhaps
> Stefano knows.
As a data-point, debian does not ship libxen-dev for i686.
We cannot build-test this configuration at all.
I can build-test Xen for armhf, and I guess it would use i386-softmmu; it's unclear
whether x86_64-softmmu and aarch64-softmmu are relevant or useful for an armhf host, or as
an armhf binary running on an aarch64 host.
r~
next prev parent reply other threads:[~2025-02-03 21:56 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-03 3:18 [PATCH v2 00/14] meson: Deprecate 32-bit host support Richard Henderson
2025-02-03 3:18 ` [PATCH v2 01/14] meson: Drop tcg as a module Richard Henderson
2025-02-03 9:58 ` Thomas Huth
2025-02-03 18:39 ` Philippe Mathieu-Daudé
2025-02-03 11:34 ` Alex Bennée
2025-02-03 18:36 ` Philippe Mathieu-Daudé
2025-02-03 3:18 ` [PATCH v2 02/14] tcg: Move stubs in tcg/perf.h to tcg/perf-stubs.c Richard Henderson
2025-02-03 10:00 ` Thomas Huth
2025-02-03 11:34 ` Alex Bennée
2025-02-03 3:18 ` [PATCH v2 03/14] plugins: Uninline qemu_plugin_add_opts Richard Henderson
2025-02-03 10:02 ` Thomas Huth
2025-02-03 11:44 ` Alex Bennée
2025-02-03 3:18 ` [PATCH v2 04/14] meson: Introduce CONFIG_TCG_TARGET Richard Henderson
2025-02-03 10:08 ` Thomas Huth
2025-02-03 16:38 ` Richard Henderson
2025-02-04 6:41 ` Thomas Huth
2025-02-03 3:18 ` [PATCH v2 05/14] tcg: Link only when required in system mode Richard Henderson
2025-02-03 10:15 ` Thomas Huth
2025-02-03 11:48 ` Alex Bennée
2025-02-03 3:18 ` [PATCH v2 06/14] plugins: " Richard Henderson
2025-02-03 10:16 ` Thomas Huth
2025-02-03 11:49 ` Alex Bennée
2025-02-03 3:18 ` [PATCH v2 07/14] accel/stubs: Expand stubs for TCG Richard Henderson
2025-02-03 10:22 ` Thomas Huth
2025-02-03 16:43 ` Richard Henderson
2025-02-03 17:38 ` Thomas Huth
2025-02-03 20:00 ` Richard Henderson
2025-02-03 3:18 ` [PATCH v2 08/14] target/mips: Protect objects with CONFIG_TCG Richard Henderson
2025-02-03 10:24 ` Thomas Huth
2025-02-03 17:25 ` Philippe Mathieu-Daudé
2025-02-03 18:01 ` Richard Henderson
2025-02-03 3:18 ` [PATCH v2 09/14] gitlab: Replace aarch64 with arm in cross-i686-tci build Richard Henderson
2025-02-03 10:30 ` Thomas Huth
2025-02-03 12:31 ` Alex Bennée
2025-02-03 3:18 ` [PATCH v2 10/14] configure: Define TARGET_LONG_BITS in configs/targets/*.mak Richard Henderson
2025-02-03 10:39 ` Thomas Huth
2025-02-03 12:33 ` Alex Bennée
2025-02-03 16:49 ` Richard Henderson
2025-02-03 17:39 ` Thomas Huth
2025-02-03 17:48 ` Philippe Mathieu-Daudé
2025-02-03 18:30 ` Philippe Mathieu-Daudé
2025-02-03 19:19 ` Richard Henderson
2025-02-03 3:18 ` [PATCH v2 11/14] target/*: Remove TARGET_LONG_BITS from cpu-param.h Richard Henderson
2025-02-03 10:43 ` Thomas Huth
2025-02-03 12:34 ` Alex Bennée
2025-02-03 18:31 ` Philippe Mathieu-Daudé
2025-02-03 3:18 ` [PATCH v2 12/14] meson: Disallow 64-bit on 32-bit TCG emulation Richard Henderson
2025-02-03 10:46 ` Thomas Huth
2025-02-03 13:54 ` Alex Bennée
2025-02-03 3:18 ` [PATCH v2 13/14] meson: Deprecate 32-bit host support Richard Henderson
2025-02-03 10:47 ` Thomas Huth
2025-02-03 13:56 ` Alex Bennée
2025-02-03 3:18 ` [PATCH v2 14/14] tcg: Remove TCG_OVERSIZED_GUEST Richard Henderson
2025-02-03 13:59 ` Alex Bennée
2025-02-04 17:42 ` Richard Henderson
2025-02-03 12:54 ` [PATCH v2 00/14] meson: Deprecate 32-bit host support Paolo Bonzini
2025-02-03 21:55 ` Richard Henderson [this message]
2025-02-03 22:43 ` Stefano Stabellini
2025-02-04 8:12 ` Daniel P. Berrangé
2025-02-04 8:19 ` Juergen Gross
2025-02-04 9:11 ` Jan Beulich
2025-02-04 10:44 ` Philippe Mathieu-Daudé
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