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[109.43.176.203]) by smtp.gmail.com with ESMTPSA id d18-20020a5d6452000000b002c71dd1109fsm1926497wrw.47.2023.03.03.03.31.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 03 Mar 2023 03:31:43 -0800 (PST) Message-ID: <4e6512e4-b159-cbe2-5f74-89fab25208e6@redhat.com> Date: Fri, 3 Mar 2023 12:31:42 +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: Peter Maydell Cc: qemu-devel@nongnu.org, Daniel Berrange , Paolo Bonzini , 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> From: Thomas Huth In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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=-0.089, 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 03/03/2023 12.16, Peter Maydell wrote: > On Thu, 2 Mar 2023 at 16:31, 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``. > > I think this is not quite true -- at the moment if you want > "every feature we implement, 32-bit" the only way to get > that is 'qemu-system-arm -cpu max'. The '-cpu max' on > qemu-system-aarch64 is 64-bit, and we don't implement for TCG > the "-cpu max,aarch64=off" syntax that we do for KVM that would > let the user say "no 64-bit support". Ok ... so what does that mean now? ... can we continue with this patch, e.g. after rephrasing the text a little bit, or do we need to implement "-cpu max,aarch64=off" for TCG first? Thomas