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Thu, 4 Dec 2025 14:30:53 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 5B4EUrB5019271 for virtualization@FreeBSD.org; Thu, 4 Dec 2025 14:30:53 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 290920] FreeBSD 15 Regression: BHyve PCI Passthrough Broken on 15-STABLE (No GSI/Interrupt Remapping Failure) Date: Thu, 04 Dec 2025 14:30:53 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 15.0-STABLE X-Bugzilla-Keywords: regression, uefi X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: martin.larsson2@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: virtualization@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Discussion List-Archive: https://lists.freebsd.org/archives/freebsd-virtualization List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-virtualization@freebsd.org Sender: owner-freebsd-virtualization@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D290920 martin.larsson2@gmail.com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |martin.larsson2@gmail.com --- Comment #9 from martin.larsson2@gmail.com --- After upgrading to FreeBSD 15, PCI passthrough of a Fresco Logic FL1100 USB= 3.0 Host Controller (pci0:3:0:0) to a bhyve VM no longer functions. The xHCI device is detected inside the Linux guest (Home Assistant OS), but= USB enumeration fails and the controller becomes unresponsive. No USB devices appear (no /dev/ttyUSB*, /dev/ttyACM*, etc.) even when directly attached to= the PCI card. This configuration worked previously on FreeBSD 14.x on the same hardware. I suspect this is related to recent changes involving bhyve PCI/USB/xHCI handling in FreeBSD 15, as the controller fails at the moment the guest tri= es to issue commands/drain the command ring. Environment: Host OS: FreeBSD 15 (fresh upgrade from 14.x) Hypervisor: bhyve Passed through device: Fresco Logic FL1100 USB 3.0 Host Controller ppt0@pci0:3:0:0 vendor=3D0x1b73 device=3D0x1100 Guest OS: Home Assistant OS / Linux kernel 6.12.x IOMMU/VT-d: Enabled pptdevs entry in loader.conf: pptdevs=3D"3/0/0" USB devices are physically connected to this PCI card (not motherboard USB). Symptoms inside guest (Linux dmesg): xhci_hcd 0000:00:06.0: xHCI Host Controller xhci_hcd 0000:00:06.0: new USB bus registered xhci_hcd 0000:00:06.0: Host supports USB 3.0 SuperSpeed ... Workqueue: events xhci_handle_command_timeout xhci_hcd 0000:00:06.0: Abort failed to stop command ring: -110 xhci_hcd 0000:00:06.0: xHCI host controller not responding, assume dead xhci_hcd 0000:00:06.0: HC died; cleaning up usb usb1-port1: couldn't allocate usb_device lsusb only shows the two root hubs, no devices. No /dev/serial/by-id, /dev/ttyUSB*, /dev/ttyACM* appears. --=20 You are receiving this mail because: You are the assignee for the bug.=