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[109.42.51.231]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43bd4310779sm7604665e9.37.2025.03.04.22.38.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 04 Mar 2025 22:38:45 -0800 (PST) Message-ID: Date: Wed, 5 Mar 2025 07:38:43 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] vfio: Make vfio-pci available on 64-bit host platforms only To: =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= , Peter Maydell , =?UTF-8?Q?C=C3=A9dric_Le_Goater?= Cc: BALATON Zoltan , Paolo Bonzini , qemu-devel@nongnu.org, Alex Williamson , Harsh Prateek Bora , Tony Krowiak , Eric Farman , Eric Auger , =?UTF-8?Q?Daniel_P=2E_Berrang=C3=A9?= , =?UTF-8?Q?Alex_Benn=C3=A9e?= References: <20250226084721.232703-1-clg@redhat.com> <20250226084721.232703-2-clg@redhat.com> <270cc189-e3b2-4bf4-b32b-8655be51bcb4@redhat.com> <8e3a5810-accf-1f77-8692-4e077c3ce327@eik.bme.hu> <2ccd4a87-68f3-4eb1-bc2a-dbc424bc8d34@linaro.org> From: Thomas Huth Content-Language: en-US Autocrypt: addr=thuth@redhat.com; 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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: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, 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 On 03/03/2025 18.32, Philippe Mathieu-Daudé wrote: > On 3/3/25 17:57, Peter Maydell wrote: >> On Mon, 3 Mar 2025 at 15:49, Cédric Le Goater wrote: >>> Why are we keeping qemu-system-ppc and qemu-system-i386, and arm, >>> since qemu-system-ppc64 and qemu-system-x86_64 should be able to >>> run the same machines ? >> >> They're not identical -- for example "-cpu max" on >> qemu-system-arm is a 32-bit CPU but on qemu-system-aarch64 >> it is a 64-bit CPU. >> >> There's definitely a lot of overlap but we can't just drop >> the -arm executable until/unless we figure out what to do >> about the corner cases where they are different. Plus there's >> a lot of users out there with existing command lines and >> configs that assume the existence of a qemu-system-arm >> executable. > > Thomas and myself have been trying to sort that out. Now with the > single-binary effort, it gained new interest. This hasn't be a trivial > task so far, due to as you mentioned the legacy CLI uses and migration. FWIW, here's my former attempt to see whether we could move into that direction: https://lore.kernel.org/qemu-devel/20230425133851.489283-1-thuth@redhat.com/ In the end, it was too frustrating to struggle with the backwards-compatibility questions (do we really need to keep qemu-system-i386 around forever?), so I pretty much gave up on that patch series. Thomas