Re: [coreboot] INT 13, real mode, block write commands and coreboot

[Philipp Stanner]

Hi,

Don't worry, x86 is hard to understand IMO. I often feel like an
archaeologist when trying to understand it.

Am Sonntag, den 03.09.2017, 00:32 +0200 schrieb
[e-mail]:
> is there a way to disable this BIOS function? More precisely,
> coreboot can be set to avoid receiving commands from GRUB and Ubuntu
> KERNEL?

cb itself can't receive commands from the OS. The payload, especially
SeaBIOS can through interrupts. Choosing a payload which only starts
the Kernel (FILO) should make it impossible for the OS to call BIOS-
code.

Of course modern boards still have the Management-engine which can do
anything behind the OS.

P.