Re: Problems with implementing EFI runtime support for x86

[Paweł Cichowski <pawel.cichowski%3mdeb.com@localhost>]

Hi, thank you so much for your explanation and detailed descriptions in the
patch you provided.

> Unfortunately there are some very tricky issues in here with handling
> pmaps.  So it'll take a bit more to get it working.  There are also

It seems like I was quite close to finally getting it working (and soo 
far at
the same time). I definitely discovered and learned a ton fascinating 
things, though!

> Would you like to give this patch a whirl before I commit it?

I am trying it out now, unfortunately I'm running into this error:
fatal privileged instruction fault in supervisor mode
[...]
kernel: privileged instruction fault trap, code=0
Stopped in pid 0.0 (system) at netbsd:xrstor+0xa:	fxsave1
This happens in efi_runtime_exit, more specifically - during fpu_kern_leave.
It's probably due to me naively debugging by just calling it during 
efi_init,
so now I'll try to do it properly and add efi_gettime to /dev/efi. How 
did you
go about testing it?

> So I'm planning to commit my version soon.  But you made a valiant
> effort -- feel free to ask again if you have any more questions about
> NetBSD kernel development!

My main concern right now is not knowing where to try and start 
contributing to
NetBSD, as it really sparked my interest. I found this project list
https://wiki.netbsd.org/projects/all/#index4h1 and will probably look 
for some
features of other BSDs which could be ported. Could you tell me where or 
how I
could find some entry-level projects?

Have a great day,
Paweł