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[109.43.176.203]) by smtp.gmail.com with ESMTPSA id o16-20020a056000011000b002c703d59fa7sm1378189wrx.12.2023.03.02.23.36.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 02 Mar 2023 23:36:24 -0800 (PST) Message-ID: <29a8a698-b056-714a-3a94-c591e5b55c44@redhat.com> Date: Fri, 3 Mar 2023 08:36:22 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.13.0 Subject: Re: [PATCH v2 4/6] docs/about/deprecated: Deprecate the qemu-system-arm binary Content-Language: en-US To: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , qemu-devel@nongnu.org, Peter Maydell , Daniel Berrange , Paolo Bonzini Cc: Markus Armbruster , =?UTF-8?Q?Alex_Benn=c3=a9e?= , qemu-arm@nongnu.org, Maxim Levitsky , libvir-list@redhat.com, Richard Henderson , xen-devel@lists.xenproject.org, Reinoud Zandijk References: <20230302163106.465559-1-thuth@redhat.com> <20230302163106.465559-5-thuth@redhat.com> <733a61bc-0e41-a864-c7fa-f177b35afa25@linaro.org> From: Thomas Huth In-Reply-To: <733a61bc-0e41-a864-c7fa-f177b35afa25@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.092, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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 On 02/03/2023 23.16, Philippe Mathieu-Daudé wrote: > On 2/3/23 17:31, Thomas Huth wrote: >> qemu-system-aarch64 is a proper superset of qemu-system-arm, >> and the latter was mainly still required for 32-bit KVM support. >> But this 32-bit KVM arm support has been dropped in the Linux >> kernel a couple of years ago already, so we don't really need >> qemu-system-arm anymore, thus deprecated it now. >> >> Signed-off-by: Thomas Huth >> --- >>   docs/about/deprecated.rst | 10 ++++++++++ >>   1 file changed, 10 insertions(+) >> >> diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst >> index a30aa8dfdf..21ce70b5c9 100644 >> --- a/docs/about/deprecated.rst >> +++ b/docs/about/deprecated.rst >> @@ -45,6 +45,16 @@ 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. >> +``qemu-system-arm`` binary (since 8.0) >> +'''''''''''''''''''''''''''''''''''''' >> + >> +``qemu-system-aarch64`` is a proper superset of ``qemu-system-arm``. The >> +latter was mainly a requirement for running KVM on 32-bit arm hosts, but >> +this 32-bit KVM support has been removed some years ago already (see: > > s/some/few/? I can also use "three years ago" since the patch had been merged in March 2020. >> +https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=541ad0150ca4 >> >> +). Thus the QEMU project will drop the ``qemu-system-arm`` binary in a >> +future release. Use ``qemu-system-aarch64`` instead. > > If we unify, wouldn't it be simpler to name the single qemu-system > binary emulating various ARM architectures as 'qemu-system-arm'? That would be more intuitive for people who are completely new to QEMU, but I guess it will cause a lot of "you broke my script that uses the -aarch64 binary" troubles again. So I think it's likely better to not go down that road. Thomas