Hi! > it's so very unfortunate the PCI standard has no feature bit to indicate > the presence of ECS. > > FWIW in my testing on a range of machines spanning 7 or 8 years i could > read config space reg 256... and get 0xffffffff when the device didn't > support ECS, and get valid data when the device did support ECS... granted > there may be some system out there which behaves really badly when you do > this. > > perhaps someone could write a userspace program and test that concept on a > far wider range of machines.
If you want to experiment with this in user space, it's easy to write a couple of access functions for the libpci in pciutils. (Patches welcome, as usually :) ) Have a nice fortnight -- Martin `MJ' Mares <[EMAIL PROTECTED]> http://mj.ucw.cz/ Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth God is real, unless declared integer. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/