On Wed, 2018-07-11 at 10:27 +0200, Pavel Machek wrote: > On Tue 2018-07-10 15:26:17, Yu-cheng Yu wrote: > > > > Explain how CET works and the no_cet_shstk/no_cet_ibt kernel > > parameters. > > > > > > --- /dev/null > > +++ b/Documentation/x86/intel_cet.txt > > @@ -0,0 +1,250 @@ > > +========================================= > > +Control Flow Enforcement Technology (CET) > > +========================================= > We normally use .rst for this kind of formatted text. I will change this to a .rst file. > > > > > > +[6] The implementation of the SHSTK > > +=================================== > > + > > +SHSTK size > > +---------- > > + > > +A task's SHSTK is allocated from memory to a fixed size that can > > +support 32 KB nested function calls; that is 256 KB for a 64-bit > > +application and 128 KB for a 32-bit application. The system admin > > +can change the default size. > How does admin change that? We already have ulimit for stack size, > should those be somehow tied together? > > $ ulimit -a > ... > stack size (kbytes, -s) 8192 > We can do that. This makes sense to me. Yu-cheng
