[LTP] [PATCH ltp v2 1/2] Add Intel umip(User Mode Instruction Prevention) basic function tests

Pengfei Xu pengfei.xu@intel.com
Thu Nov 8 11:51:50 CET 2018

Thanks Hrubis, it's OK, and it's not urgent for me.
Thanks for your information!

On 2018-11-08 at 11:13:45 +0100, Cyril Hrubis wrote:
> Hi!
> > > Is there any other way how to find out UMIP has been enabled in kernel?
> > > 
> > > I would like to avoid maitaing code that tries to look for all possible
> > > config locations if possible.
> > > 
> >   Could find "Activated the Intel User Mode Instruction Prevention (UMIP)
> >   CPU feature" info in the head of dmesg, but afraid boot long time dmesg
> >   head is covered... And no sysfs file for umip to check.
> >   So could I add the info when cases failed???"possible due to
> >   kconfig not set CONFIG_X86_INTEL_UMIP=y"?
> I was looking into this yesterday and even talked to our kernel devs and
> it seems that there is no other option than checking the .config to be
> sure it was enabled.
> So we may end up adding support for parsing the kernel config, it would
> be probably useful in differents parts of LTP. But to make this happen
> we should make it a library function and make sure it's accesible for C
> testcases as well.
> I can look into that and try to post a RFC patch later on, but it would
> probably take more than week to get sorted out.
> -- 
> Cyril Hrubis
> chrubis@suse.cz

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