Virtio mem driver

modulename: virtio_mem.ko

configname: CONFIG_VIRTIO_MEM

Linux Kernel Configuration
└─>Device Drivers
└─>Virtio drivers
└─>Virtio mem driver
In linux kernel since version 5.1 (release Date: 2019-05-05)  
This driver provides access to virtio-mem paravirtualized memory
devices, allowing to hotplug and hotunplug memory.

This driver currently only supports x86-64 and arm64. Although it
should compile on other architectures that implement memory
hot(un)plug, architecture-specific and/or common
code changes may be required for virtio-mem, kdump and kexec to work as
expected.

If unsure, say M.

source code: