https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290920
--- Comment #6 from [email protected] --- sys/dev/vmm/vmm.c is suspect here: Symptom: The GPU failed with "no GSI" / "can't derive routing". GSI (Global System Interrupt) is a Linux concept, but it means the physical interrupt signal from the passed-through PCI device (GPU or USB controller) is not being correctly mapped by the hypervisor into a signal the guest OS can understand. Commits touching the core interrupt handling between the host's IOMMU hardware (VT-d/AMD-Vi) and the virtualized environment are the prime suspects. Look for PRs that: Refactor or clean up the MSI/MSI-X handling within the vmm driver. Update core IOMMU register access or error handling code. Change the logic for x2APIC or IO-APIC interrupt injection into the guest. -- You are receiving this mail because: You are the assignee for the bug.
