Comment 2 for bug 917135

hv_timesource: this is delivered by x86/kernel/cpu/mshyperv.c and builtin
hv_vmbus: delivered by hy_vmbus.ko and is modular; CONFIG_HYPERV=m
hv_utils: delivered by hy_utils and is modular; CONFIG_HYPERV_UTILS=m
hv_netvsc: delivered by hy_netvsc and is modular; CONFIG_HYPERV_NET=m
hv_mouse: delivered by hy_mouse and is modular; CONFIG_HYPERV_MOUSE=m
hv_storvsc: delivered by hy_netvsc and is modular; CONFIG_HYPERV_NET=m

All of these are already enabled and available kernel side, and appear in a
completed install.

These however are not obviously included in either the default initramfs nor included in d-i.