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Tsirkin" , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Manos Pitsidianakis , devel@lists.libvirt.org, Richard Henderson , Peter Maydell , qemu-arm@nongnu.org, Jason Wang , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , =?UTF-8?q?Alex=20Benn=C3=A9e?= Subject: [PATCH] hw/arm: Deprecate legacy VirtIO devices on big-endian guests Date: Wed, 17 Dec 2025 15:06:57 +0100 Message-ID: <20251217140658.89715-1-philmd@linaro.org> X-Mailer: git-send-email 2.52.0 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::32a; envelope-from=philmd@linaro.org; helo=mail-wm1-x32a.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 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1765980461766154100 We couldn't find a way (guest OS with VirtIO drivers) to test a legacy VirtIO device on a ARM vCPU running in big-endian. Deprecate for the v11.0 release, giving 1 year to users who really care to contribute functional tests. Suggested-by: Alex Benn=C3=A9e Signed-off-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Manos Pitsidianakis --- docs/about/deprecated.rst | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst index ac31a2bce42..3a69facb0f1 100644 --- a/docs/about/deprecated.rst +++ b/docs/about/deprecated.rst @@ -515,6 +515,17 @@ It was implemented as a no-op instruction in TCG up to= QEMU 9.0, but only with ``-cpu max`` (which does not guarantee migration compatibility across versions). =20 +VirtIO devices +'''''''''''''' + +Legacy VirtIO devices on Big-Endian ARM architecture (since 11.0) +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +There are no functional tests for legacy virtio devices used by ARM +machines running in big-endian order, which makes harder to maintain +the code path while the code base evolve. + + Backwards compatibility ----------------------- =20 --=20 2.52.0