Xen Dom0-less
summary
Claim: Xen’s Dom0-less feature boots Xen plus multiple guest kernels and initrds in parallel so a small critical guest goes from ~10s to boot critical app in <1s. U-Boot loads binaries and a device-tree extension tells Xen which domains and memory/vCPU to start, mapping physical devices so a NIC is device passthrough at boot into the yellow domain. Demo shows parallel boots, yellow VM has external network, Dom0 still optional for later management. Xen 4.12 contains core Dom0-less support; passthrough code is published but not yet fully upstream.
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