> Reading past the first 256 bytes of the sysfs file should be enough
> -- only root can do that (other users get only 64 bytes anyway) and
> problems with reading random registers have hopefully taught programs
> not to read blindly a long time ago.

... except for lspci itself which reads the first few bytes of the
extended space to see if there are any capabilities, which is generally
safe, but it would always enable MMCONFIG.

So an extra switch will be really needed.

                                Have a nice fortnight
-- 
Martin `MJ' Mares                          <[EMAIL PROTECTED]>   
http://mj.ucw.cz/
Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
The best way to accelerate Windows is at 9.8 m / sec^2
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