Update: adding 'iomem=relaxed' to the kernel bootparams allows 'biosie' (from
the BIOS*.BIN DUPkit) to update the BIOS.
The docs on this suck, though:
.../src/linux-source-4.16/Documentation# sed -ne '/iomem=/,/^$/p'
./admin-guide/kernel-parameters.txt
iomem= Disable strict checking of access to MMIO memory
strict regions from userspace.
relaxed
No indications of the risks involved (okay, i presume this is a little better
than all /dev/mem, as it would still immediately protect against memory
scraping sensitive user process data and such, but still lets a potential
cracker control/manipulate devices)
But unless i run that way always, rebooting an alternate grub line just to BIOS
update adds an extra reboot.
(the goal is to not have to sit at the console, take long periods in lifecycle
controller, ... or do multiple reboot hacks)
(I'm getting the feeling there's going to be no easy workaround anymore past
Kernel 4.16 because the SMBIOS table is iomapped outide 1MB)
--stephen
--
Stephen Dowdy - Systems Administrator - NCAR/RAL
303.497.2869 - [email protected] - http://www.ral.ucar.edu/~sdowdy/
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