CTF: UEFI HTTP boot support
Rodney W. Grimes
freebsd-rwg at gndrsh.dnsmgr.net
Wed Jun 17 17:40:59 UTC 2020
> On 6/16/20 5:17 AM, Miguel C wrote:
>
> > I've been trying out FreeBSD with raspberry Pi4 (4GB) and wanted to see
> > what the state of HTTP BOOT is in FreeBSD, so I bumped into this!
> >
> > I'm curious if it should be possible to point to a img/iso directly (I
> > tried to use the img.xz unpacked it and make it available on a local web
> > server and that didn't seem to work for me) but maybe thats cause those
> > images miss something, so arm64 aside does that work for amd64? I.E. using
> > the bootonly.iso?
>
> Unfortunately HTTP boot only works as far as the kernel: UEFI fetches
> loader.efi, the loader fetches and runs the kernel over HTTP -- and then
> you need to use NFS to mount the filesystem (or have a local root
> filesystem).
>
>
> UEFI also has RamDisk support, but I don't think that's for remote
> ISO/disk files, just local files.
>
Does FreeBSD kernel have a driver that can talk to the UEFI ramdisk?
I believe that is how many of the other distro's
are actually able to do this "load the stock .iso over the
network and just run from that in memory." I have booted
serveral things this way and it is a nice feature.
> --
> Rebecca Cran
--
Rod Grimes rgrimes at freebsd.org
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