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Open Source and information security mailing list archives
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Date: Mon, 3 Sep 2007 21:01:24 +0200 From: Martin Mares <mj@....cz> To: dean gaudet <dean@...tic.org> Cc: Robert Richter <robert.richter@....com>, Andi Kleen <ak@...e.de>, patches@...-64.org, linux-kernel@...r.kernel.org Subject: Re: [patch 5/5] x86: Set PCI config space size to extended for AMD Barcelona 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 <mj@....cz> 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 majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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