Bhyve and UEFI NVRAM

[Mathieu Arnold]

Hi,

Maybe I am going at it in the wrong way, but any hints would be
appreciated.

On Thu, Jan 16, 2020 at 10:04:42AM +0100, Mathieu Arnold wrote:
> Hi,
> 
> I have been trying to install arch linux in bhyve, it works great if I
> uses the BIOS with grub, but for my purpose, I need to be able to boot
> using UEFI mode.
> So, I install the vm using the arch iso, it works just fine, I use the
> tutorial here https://wiki.archlinux.org/index.php/EFISTUB to boot using
> UEFI directly, without adding a layer of boot manager, which is
> basically using:
> 
> efibootmgr --disk /dev/vda --part 1 --create --label "Arch Linux" --loader /vmlinuz-linux --unicode 'root=PARTUUID=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX rw initrd=\initramfs-linux.img' --verbose
> 
> to add a boot entry to the NVRAM with the correct "thingies" to get the
> UEFI firmware to find all it needs.
> 
> It works correctly because if at that point I reboot the vm, it boots
> correctly into the arch installation, and as long as I don't stop/start
> the vm it works.
> 
> Now, if I stop the vm and start it up again, it does not work anymore
> because whatever UEFI NVRAM efibootmgr wrote to, it seems it was only
> non volatile as long as the bhyve process was running, but it was not
> actually saved anywhere for later use.
> 
> So, I am wondering, is there some magic bhyve thing that I could not
> find in the man page that would allow me to map the nvram to a file on
> the host?  Or some other magic that would allow me to change the bhyve
> nvram from the bhyve command line?
> 
> Regards,
> 
> PS: as a side note, I don't use bhyve directly but I use it through
> sysutils/vm-bhyve, but it should probably not matter.
> -- 
> Mathieu Arnold



-- 
Mathieu Arnold
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