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bh=gpMZCL+ZRNMIhkrQnoWgZUYc+TvsezBIyUL4VHR6XQE=; b=NjUWvjr4zfAV+i+RNZDRsazP42dOS07bnxIQ8x+Ey6U+7T/xIxUV+5AYGpM/cZXFHJFLST 3Gupo+CbsoGc26Aogd7h1Dmk9fdwJYO7ffKZELAdxpnpzWVu6515eGtsc8cSnDnYGOVOnH LqIdC2mjgUh/n6O4rZ4P8hqiEvo2owA= X-MC-Unique: k428LqqBMKqLCdORPKuOuw-1 From: Thomas Huth To: qemu-devel@nongnu.org, Paolo Bonzini , Eduardo Habkost Cc: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Marcel Apfelbaum , Yanan Wang , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= Subject: [RFC PATCH 3/3] docs/about/deprecated: Deprecate the qemu-system-i386 binary Date: Tue, 25 Apr 2023 15:38:51 +0200 Message-Id: <20230425133851.489283-4-thuth@redhat.com> In-Reply-To: <20230425133851.489283-1-thuth@redhat.com> References: <20230425133851.489283-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.171, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1682430008262100001 Content-Type: text/plain; charset="utf-8" Aside from not supporting KVM on 32-bit hosts, the qemu-system-x86_64 binary is a proper superset of the qemu-system-i386 binary. And with the 32-bit x86 host support being deprecated now, it is possible to deprecate the qemu-system-i386 binary now, too. With regards to 32-bit KVM support in the x86 Linux kernel, the developers confirmed that they do not need a recent qemu-system-i386 binary here: https://lore.kernel.org/kvm/Y%2ffkTs5ajFy0hP1U@google.com/ Signed-off-by: Thomas Huth Reviewed-by: Daniel P. Berrang=C3=A9 Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Wilfred Mallawa --- docs/about/deprecated.rst | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst index 1ca9dc33d6..c205816c7d 100644 --- a/docs/about/deprecated.rst +++ b/docs/about/deprecated.rst @@ -34,6 +34,22 @@ deprecating the build option and no longer defend it in = CI. The ``--enable-gcov`` build option remains for analysis test case coverage. =20 +``qemu-system-i386`` binary (since 8.1) +''''''''''''''''''''''''''''''''''''''' + +The ``qemu-system-i386`` binary was mainly useful for running with KVM +on 32-bit x86 hosts, but most Linux distributions already removed their +support for 32-bit x86 kernels, so hardly anybody still needs this. The +``qemu-system-x86_64`` binary is a proper superset and can be used to +run 32-bit guests by selecting a 32-bit CPU model, including KVM support +on x86_64 hosts. Thus users are recommended to reconfigure their systems +to use the ``qemu-system-x86_64`` binary instead. If a 32-bit CPU guest +environment should be enforced, you can switch off the "long mode" CPU +flag with ``-cpu max,lm=3Doff``, or rename/symlink ``qemu-system-x86_64`` +to ``qemu-system-i386`` -- QEMU will then run with the 64-bit extensions +disabled. + + System emulator command line arguments -------------------------------------- =20 --=20 2.31.1