Comment 0 for bug 1981385

If you use UEFI http boot to boot an image (rather than an EFI executable) and get all the way to a normal userspace, you can access the boot image as /dev/pmem0. But this is not accessible in the initrd; presumably some modules are missing. Dimitri added some modules that are clearly going to be necessary (kernel/drivers/nvdimm) in 0.140ubuntu14 and I added kernel/drivers/dax too in local experiments but this appears not to be enough to get it to appear.

This is desirable because then you can just feed an installer ISO to a machine via http boot and the installer just works as normal (the speed and, uh, quality, of the implementation of HTTP in a given machine's firmware may mean this isn't always the best option but it would be nice if it worked in case someone's machine actually does this well).