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envelope-from=jamin_lin@aspeedtech.com; helo=SEYPR02CU001.outbound.protection.outlook.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, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 The automatic hub is now off for a new machine type.=0A= =0A= Signed-off-by: Jamin Lin =0A= ---=0A= docs/system/devices/usb.rst | 7 +++++--=0A= 1 file changed, 5 insertions(+), 2 deletions(-)=0A= =0A= diff --git a/docs/system/devices/usb.rst b/docs/system/devices/usb.rst=0A= index dc694d23c2..24e8ccf96e 100644=0A= --- a/docs/system/devices/usb.rst=0A= +++ b/docs/system/devices/usb.rst=0A= @@ -3,8 +3,11 @@ USB emulation=0A= =0A= QEMU can emulate a PCI UHCI, OHCI, EHCI or XHCI USB controller. You can=0A= plug virtual USB devices or real host USB devices (only works with=0A= -certain host operating systems). QEMU will automatically create and=0A= -connect virtual USB hubs as necessary to connect multiple USB devices.=0A= +certain host operating systems).=0A= +=0A= +A machine type older than 11.2 plugs a virtual USB hub into the last=0A= +free port, so that more devices fit. A newer one does not, and a=0A= +device that finds no free port fails.=0A= =0A= USB controllers=0A= ~~~~~~~~~~~~~~~=0A= -- =0A= 2.43.0=0A=