Microsoft Hyper-V root partition support

modulename: mshv_root.ko

configname: CONFIG_MSHV_ROOT

Linux Kernel Configuration
└─>Device Drivers
└─>Microsoft Hyper-V guest support
└─>Microsoft Hyper-V root partition support
In linux kernel since version 5.4.295 (release Date: 2025-06-27)  
Select this option to enable support for booting and running as root
partition on Microsoft Hyper-V.

If unsure, say N.

source code:
selects
CONFIG_EVENTFD
CONFIG_VIRT_XFER_TO_GUEST_WORK

depends
CONFIG_HYPERV
CONFIG_PAGE_SIZE_4KB
NOT CONFIG_HYPERV_VTL_MODE
CONFIG_ARM64 or CONFIG_X86_64