Xen 4.22 Released With AMD Zen 5 BLT Support, Improved RISC-V Virtualization

Xen 4.22 has been released as the latest feature update to the open-source hypervisor. Key additions include support for AMD Zen 5's Bus Lock Threshold (BLT), which limits performance degradation from improper atomic instructions. RISC-V virtualization support continues to mature toward full guest virtualization, ARM gains guest suspend/resume power management, and cloud environments benefit from improved guest resource over-consumption controls. Automotive and embedded use-cases also receive targeted enhancements.

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