On 03/02/2015 04:09 PM, Yu, Fenghua wrote: > Xsaves has been tested by QA since 3.17 with or without MPX. I'm not > aware of reported issues. > > But MPX is the only code to call the get_xsave_addr kernel API. > Though it has been tested before on upstream MPX code.
Has it? I'm fairly sure I've never explicitly tested it. I'm also doubting now that I've *ever* seen it work without booting with 'noxsaves'. > What changes in your new MPX code? I just discovered it when adding a new feature. I actually backed out all of my changes before reporting this issue. I'm running a completely untouched 4.0-rc1 kernel with the config I attached a moment ago. If I boot with 'noxsaves', MPX works fine. If I boot without it, the kernel never sees the values that userspace sets in the "bndcsr" register. -- 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/
