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Sat, 18 Feb 2023 17:54:29 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.9.0-alpha0-156-g081acc5ed5-fm-20230206.001-g081acc5e Mime-Version: 1.0 Message-Id: In-Reply-To: <113c15a8-689c-de03-7543-5548b7c658e6@redhat.com> References: <20230130114428.1297295-1-thuth@redhat.com> <87a61cbmti.fsf@pond.sub.org> <72bd7694-9d37-1f9b-db4e-6d5818f7c55c@linaro.org> <113c15a8-689c-de03-7543-5548b7c658e6@redhat.com> Date: Sat, 18 Feb 2023 22:54:08 +0000 From: "Jiaxun Yang" To: "Thomas Huth" , =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= , "Paolo Bonzini" , =?UTF-8?Q?Daniel_P=2E_Berrang=C3=A9?= , "Markus Armbruster" Cc: "Peter Maydell" , libvir-list@redhat.com, "Stefan Weil" , "Huacai Chen" , "Richard Henderson" , "BALATON Zoltan via" , "Reinoud Zandijk" , "Stefan Hajnoczi" , "Ryo ONODERA" , "Brad Smith" Subject: Re: [RFC PATCH] docs/about/deprecated: Deprecate 32-bit host systems Content-Type: text/plain;charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=66.111.4.27; envelope-from=jiaxun.yang@flygoat.com; helo=out3-smtp.messagingengine.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-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 =E5=9C=A82023=E5=B9=B42=E6=9C=8817=E6=97=A5=E4=BA=8C=E6=9C=88 =E4=B8=8B=E5= =8D=886:57=EF=BC=8CThomas Huth=E5=86=99=E9=81=93=EF=BC=9A > On 17/02/2023 18.43, Philippe Mathieu-Daud=C3=A9 wrote: >> (Cc'ing Huacai & Jiaxun). >>=20 >> On 17/2/23 17:38, Paolo Bonzini wrote: >>> On 2/17/23 11:47, Daniel P. Berrang=C3=A9 wrote: >>>> On Fri, Feb 17, 2023 at 11:36:41AM +0100, Markus Armbruster wrote: >>>>> I feel the discussion petered out without a conclusion. >>>>> >>>>> I don't think letting the status quo win by inertia is a good outc= ome >>>>> here. >>>>> >>>>> Which 32-bit hosts are still useful, and why? >>>> >>>> Which 32-bit hosts does Linux still provide KVM=C2=A0 support for. >>> >>> All except ARM: MIPS, x86, PPC and RISC-V. >>> >>> I would like to remove x86, but encountered some objections. >>> >>> MIPS, nobody is really using it I think. >>=20 >> 32-bit was added in 2014, commit 222e7d11e7 ("target-mips: Enable KVM >> support in build system"). I'm not aware of anybody using it (even >> testing it). I don't have hardware to test it (neither time). > > Could you maybe suggest a kernel patch to remove it, to see what happe= ns?=20 > ... if nobody objects to the removal of the 32-bit MIPS KVM kernel sup= port=20 > and the patch gets merged, that would help us in the long run, I think. I=E2=80=99m still occasionally testing 32-bit MIPS KVM support with MIPS= P5600. It works just fine so there is no need for further maintenance work. I=E2=80=99d be sad to see the support go but I can live with it. There are commercial users for MIPS 32 KVM but they=E2=80=99re all runni= ng customized downstream QEMU so I guess it=E2=80=99s fine. Thanks - Jiaxun > > Thanks, > Thomas --=20 - Jiaxun