Re: port-amd64/32816: amd64 can not load lkms

[Andrew Doran <ad%netbsd.org@localhost>]

The following reply was made to PR port-amd64/32816; it has been noted by GNATS.

From: Andrew Doran <ad%netbsd.org@localhost>
To: matthew green <mrg%eterna.com.au@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, port-amd64-maintainer%netbsd.org@localhost,
        gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, 
martin%aprisoft.de@localhost
Subject: Re: port-amd64/32816: amd64 can not load lkms
Date: Mon, 20 Apr 2009 08:38:10 +0000

 On Sun, Apr 19, 2009 at 08:08:24PM +1000, matthew green wrote:
 
 >     > From: matthew green <mrg%eterna.com.au@localhost>
 >     > To: gnats-bugs%netbsd.org@localhost
 >     > Cc: netbsd-bugs%netbsd.org@localhost
 >     > Subject: Re: port-amd64/32816: amd64 can not load lkms
 >     > Date: Sun, 19 Apr 2009 12:18:17 +1000
 >     > 
 >     >  FYI:
 >     >  
 >     >  i tested andrew's fix for this on netbsd-5 and have submitted pullups.
 >     
 >     IIRC amd64 was loading lkms into the ISA I/O hole and so corrupting 
 > shadowed
 >     ROM images, video memory, etc.
 > 
 > DEV       0  -1/161 ffffffff80e24000 00b4 ffffffff80e4c820   2 pf
 > 
 > this doesn't seem anywhere near ISA or VGA memory?
 
 I misremembered. It loaded modules at atdevbase, blatting the ISA hole in
 the process.
 
 >     >  there's another problem with /dev/ksyms not working properly for 
 > modload
 >     >  (really ld(1)) that is workaroundable with -A /netbsd.
 >     
 >     I have a patch to disable /dev/ksyms usage in modload. It doesn't really
 >     matter for the LKMs that we ship.
 > 
 > i thought this used to work.
 
 By luck I guess.