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[174.21.71.127]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-72f8a78e0f9sm7791026b3a.158.2025.01.27.16.42.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Jan 2025 16:42:56 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Cc: thuth@redhat.com, peter.maydell@linaro.org, stefanha@redhat.com, pbonzini@redhat.com, berrange@redhat.com, philmd@linaro.org, mark.cave-ayland@ilande.co.uk, alex.bennee@linaro.org Subject: [PATCH 0/1] meson: Deprecate 32-bit host systems Date: Mon, 27 Jan 2025 16:42:53 -0800 Message-ID: <20250128004254.33442-1-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::62b; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x62b.google.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org Time for our biennial attempt to kill ancient hosts. I've been re-working the tcg code generator a bit over the holidays. One place that screams for a bit of cleanup is with 64-bit guest addresses on 32-bit hosts. Of course the best "cleanup" is to not have to handle such silliness at all. Two years after Thomas' last attempt, https://lore.kernel.org/qemu-devel/20230130114428.1297295-1-thuth@redhat.com/ which resulted only in deprecation of i686 host for system emulation. By itself, this just isn't enough for large-scale cleanups. I'll note that we've separately deprecated mips32, set to expire with the end of Debian bookworm, set to enter LTS in June 2026. I'll note that there is *already* no Debian support for ppc32, and that I am currently unable to cross-compile that host at all. Showing my hand a bit, I am willing to limit deprecation to 64-bit guests on 32-bit hosts. But I'd prefer to go the whole hog: unconditional support for TCG_TYPE_I64 would remove a *lot* of 32-bit fallback code. r~ Richard Henderson (1): meson: Deprecate 32-bit host support docs/about/deprecated.rst | 8 ++++++++ meson.build | 6 ++---- 2 files changed, 10 insertions(+), 4 deletions(-) Reviewed-by: Thomas Huth