On Tue, Nov 27, 2018 at 09:19:09PM -0500, Kevin O'Connor wrote: > On Tue, Nov 27, 2018 at 01:10:38PM +0100, Gerd Hoffmann wrote: > > Check whenever pnp roms attempt to redirect int19, and in case it does > > log a message and undo the redirect. > > > > A pnp rom should not need this, we have BEVs and BCVs for that. > > Nevertheless there are roms in the wild which are redirecting int19. > > At least some BIOS implementations for physical hardware have a config > > option in the setup to allow/disallow int19 redirections, so just not > > allowing this seems to be the way to deal with this situation. > > > > Buglink: https://bugzilla.redhat.com//show_bug.cgi?id=1642135 > > That is very odd. I'm pretty sure iPXE normally does register itself > as a BEV - any idea why it's now hooking int19?
It's not ipxe. It is the rom of a intel nic, attached to a guest via pci passthrough. It does both, register bev and hook int19. No clue why. The only reason I can think of is backward compatibility to firmware so old that it doesn't know pnp roms. Which is a silly thing in pci express hardware. Maybe they carry forward that code since decades ... > I'm leery of making a change like this, because there's a good chance > it will break something in some other obscure software. I've added a rather verbose message printing some information about the rom because of that. > I think fixing this in iPXE would be preferable if possible. See above. ipxe doesn't need fixing. cheers, Gerd _______________________________________________ SeaBIOS mailing list SeaBIOS@seabios.org https://mail.coreboot.org/mailman/listinfo/seabios
