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Fri, 25 Jul 2025 08:45:22 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: Thomas Huth , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Paolo Bonzini , =?UTF-8?q?Alex=20Benn=C3=A9e?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Manos Pitsidianakis Subject: [PATCH for 10.1 v2 04/14] docs/user: slightly reword section on system calls Date: Fri, 25 Jul 2025 16:45:07 +0100 Message-ID: <20250725154517.3523095-5-alex.bennee@linaro.org> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250725154517.3523095-1-alex.bennee@linaro.org> References: <20250725154517.3523095-1-alex.bennee@linaro.org> 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::62a; envelope-from=alex.bennee@linaro.org; helo=mail-ej1-x62a.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: 1753458419375116600 Expand the description slightly and quote ioctl(). I did ponder mentioning something about why DRM ioctls are often missing but I see we have the I915 ones so I guess its just no one has done them. Reviewed-by: Manos Pitsidianakis Signed-off-by: Alex Benn=C3=A9e --- docs/user/main.rst | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/docs/user/main.rst b/docs/user/main.rst index b8ff203c212..05de904225c 100644 --- a/docs/user/main.rst +++ b/docs/user/main.rst @@ -20,10 +20,14 @@ QEMU user space emulation has the following notable fea= tures: System call translation ~~~~~~~~~~~~~~~~~~~~~~~ =20 -QEMU includes a generic system call translator. This means that the -parameters of the system calls can be converted to fix endianness -and 32/64-bit mismatches between hosts and targets. IOCTLs can be -converted too. +System calls are the principle interface between user-space and the +kernel. Generally the same system calls exist on all versions of the +kernel so QEMU includes a generic system call translator. The +translator takes care of adjusting endianess, 32/64 bit parameter size +and then calling the equivalent host system call. + +QEMU can also adjust device specific ``ioctl()`` calls in a similar +fashion. =20 POSIX signal handling ~~~~~~~~~~~~~~~~~~~~~ --=20 2.47.2