Linux Stubdomains Status Update
summary
Status update on Linux-based device-model stubdomains: a minimal initramfs runs QEMU in a stubdomain to keep device-model out of Dom0, used in Qubes 4.4.2 with PCI passthrough including MSI-X working after Xen patches and QEMU patches (posted and reviewed). USB uses usbip over qrexec to forward devices, audio uses PulseAudio in the stubdomain with dynamic backend switching, typical stubdomain sizes are ~128–150 MB (minimal builds; 32 MB was historic).
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chapters (12)
- 0:00Introduction
- 0:23History of Linux stubdomains
- 3:40Why use stubdomains
- 6:11Building the stubdomain
- 8:25Audio passthrough
- 10:56Dynamic audio backend switching
- 11:19Direct kernel boot
- 14:28USB passthrough
- 17:43PCI passthrough challenges
- 21:20Stubdomain migration support
- 22:49Upstream status
- 24:16Q&A
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