Russell Currey <rus...@russell.cc> writes: > On Wed, 2018-11-07 at 16:56 +0000, Christophe Leroy wrote: >> This patch adds a skeleton for Kernel Userspace Execution Prevention. >> >> Then subarches implementing it have to define CONFIG_PPC_HAVE_KUEP >> and provide setup_kuep() function. >> >> Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr> > > An open question (with nothing to do specifically with this patch): > > For what reason would you ever disable execution prevention? Clearly > there must be something since "nosmep" is a thing, but I don't know why > we'd ever do it.
Because depending on the implementation there might be a performance overhead, and you may want to avoid that. cheers
