On Tue, Feb 7, 2017 at 11:11 AM, Kees Cook <keescook@xxxxxxxxxxxx> wrote: > On Tue, Feb 7, 2017 at 10:56 AM, Andy Lutomirski <luto@xxxxxxxxxx> wrote: >> Quite a few people have expressed interest in enabling PCID on (x86) >> Linux. Here's the code: >> >> https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/log/?h=x86/pcid >> >> The main hold-up is that the code needs to be reviewed very carefully. >> It's quite subtle. In particular, "x86/mm: Try to preserve old TLB >> entries using PCID" ought to be looked at carefully to make sure the >> locking is right, but there are plenty of other ways this this could >> all break. >> >> Anyone want to take a look or maybe scare up some other reviewers? >> (Kees, you seemed *really* excited about getting this in.) > > Yeah, I'd really like to build on it to gain SMAP emulation, though > both implementing that and reviewing the existing series is outside my > current skills (well, okay, you could add "Reviewed-by:"-me to the > first 3 patches ;)). I don't know Intel guts well enough to > meaningfully do anything on the others. :) > > I've added Thomas Garnier to CC, in case this is something he might be > able to assist with. It would be great to add but I have limited cycles and definitely lacking knowledge on that front. > > Does this need benchmarking or other testing? Perhaps bring it to the > kernel-hardening list for that? > > Also, what's needed to gain SMAP emulation? > > -Kees > > -- > Kees Cook > Pixel Security -- Thomas -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
