[Xorg] The big multiconsole nasty

Egbert Eich eich at pdx.freedesktop.org
Mon Jul 12 05:33:10 PDT 2004

Alan Cox writes:
 > On Llu, 2004-07-05 at 17:27, Jon Smirl wrote:
 > > But now we end up building everything twice on Linux since fbdev needs
 > > all of these things too. Then we have to spend time making the X and
 > > fbdev versions play nice together. Plus, X's PCI bus manipulations are
 > > in direct conflict with the Linux kernel.
 > The more can be pushed to user space the easier that gets. BTW I've been
 > looking at the PCI issue and there seems to be another lurking horror
 > which could cause corruption on big AMD64 boxes and in some other cases.
 > The BIOS emulation stuff (unless I've missed something
 > here which is possible as its a first scan) doesn't seem to revector
 > BIOS PCI conf1 access attempts via the kernel pci interface.

It does for 32bit accesses however not for 8 and 16bit ones.
So far this hasn't been a problem but you never know what those
BIOS guys come up with...
Also we don't catch conf2 access attempts - but so far I havn't
seen a BIOS that does these.


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