A Linux kernel experimental branch is being formed for the release 5.4, , warning about the upcoming discontinuation of support for 32-bit guest systems operating in paravirtualization mode under the Xen hypervisor. Users of such systems are advised to transition to using 64-bit kernels in guest environments or to use full virtualization (HVM) or combined virtualization (PVH) modes instead of paravirtualization (PV) for running environments.
PV mode is considered outdated and has been replaced by PVH, where paravirtualization (PV) elements are limited to input/output, interrupt handling, boot process organization, and interaction with hardware, while full virtualization (HVM) is used to restrict privileged instructions, isolate system calls, and virtualize memory page tables. A further argument against supporting PV mode for 32-bit guest systems is the lack of protection against vulnerabilities. .
Forrás: opennet.ru
