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Mon, 03 Feb 2025 05:56:06 -0800 (PST) Received: from draig.lan ([185.126.160.109]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ab6e4a320c6sm753858666b.155.2025.02.03.05.56.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2025 05:56:05 -0800 (PST) Received: from draig (localhost [IPv6:::1]) by draig.lan (Postfix) with ESMTP id E98C85F8BF; Mon, 3 Feb 2025 13:56:04 +0000 (GMT) From: =?utf-8?Q?Alex_Benn=C3=A9e?= To: Richard Henderson Cc: qemu-devel@nongnu.org, pbonzini@redhat.com, mark.cave-ayland@ilande.co.uk, berrange@redhat.com, philmd@linaro.org, thuth@redhat.com Subject: Re: [PATCH v2 13/14] meson: Deprecate 32-bit host support In-Reply-To: <20250203031821.741477-14-richard.henderson@linaro.org> (Richard Henderson's message of "Sun, 2 Feb 2025 19:18:20 -0800") References: <20250203031821.741477-1-richard.henderson@linaro.org> <20250203031821.741477-14-richard.henderson@linaro.org> User-Agent: mu4e 1.12.8; emacs 29.4 Date: Mon, 03 Feb 2025 13:56:04 +0000 Message-ID: <87ikprcetn.fsf@draig.linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::630; envelope-from=alex.bennee@linaro.org; helo=mail-ej1-x630.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Richard Henderson writes: > We deprecated i686 system mode support for qemu 8.0. However, to > make real cleanups to TCG we need to deprecate all 32-bit hosts. > > Signed-off-by: Richard Henderson > --- > docs/about/deprecated.rst | 7 +++++++ > meson.build | 6 ++---- > 2 files changed, 9 insertions(+), 4 deletions(-) > > diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst > index 4a3c302962..7c61d0ba16 100644 > --- a/docs/about/deprecated.rst > +++ b/docs/about/deprecated.rst > @@ -204,6 +204,13 @@ is going to be so much slower it wouldn't make sense= for any serious > instrumentation. Due to implementation differences there will also be > anomalies in things like memory instrumentation. >=20=20 > +32-bit host operating systems (since 10.0) > +'''''''''''''''''''''''''''''''''''''''''' > + > +Keeping 32-bit host support alive is a substantial burden for the > +QEMU project. Thus QEMU will in future drop the support for all > +32-bit host systems. > + > System emulator CPUs > -------------------- >=20=20 > diff --git a/meson.build b/meson.build > index 866b8ce477..0dae54da0d 100644 > --- a/meson.build > +++ b/meson.build > @@ -4833,14 +4833,12 @@ if host_arch =3D=3D 'unknown' > message('configure has succeeded and you can continue to build, but') > message('QEMU will use a slow interpreter to emulate the target CPU.= ') > endif > -elif host_arch =3D=3D 'mips' > +elif host_long_bits < 64 > message() > warning('DEPRECATED HOST CPU') > message() > message('Support for CPU host architecture ' + cpu + ' is going to > be') Support for 32 bit host architecture...? > - message('dropped as soon as the QEMU project stops supporting Debian 1= 2') > - message('("Bookworm"). Going forward, the QEMU project will not guaran= tee') > - message('that QEMU will compile or work on this host CPU.') > + message('dropped in a future QEMU release.') > endif >=20=20 > if not supported_oses.contains(host_os) Otherwise: Reviewed-by: Alex Benn=C3=A9e --=20 Alex Benn=C3=A9e Virtualisation Tech Lead @ Linaro