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Re: bioscall and EFI
On Mon, Oct 07, 2019 at 01:49:50PM +0000, Emmanuel Dreyfus wrote:
> If I understand correctly, there is no hope to survive a bioscall()
> when we booted from an EFI system. The first one happens in
> start -> init386() -> mca_busprobe()
> How is it supposed to work? I would have expected an alternate path
> for EFI bootstrap here...
This has me thinking that, actually, what happens early in boot does
tell us quite a bit about the possible hardware configuration of the
machine and could - should? - let us skip a bunch of probing later on.
Obviously you cannot have a machine with EFI firmware and MicroChannel.
But I bet it goes a lot further than that (and I bet there are other BIOS
calls that ought to be skipped too).
Thor Lancelot Simon tls%panix.com@localhost
"Whether or not there's hope for change is not the question. If you
want to be a free person, you don't stand up for human rights because
it will work, but because it is right." --Andrei Sakharov
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