| commit | 31ed2b13c48d779efc838ad54e30121e088a62af | [log] [tgz] |
|---|---|---|
| author | Christophe Leroy <christophe.leroy@c-s.fr> | Mon Mar 11 08:30:35 2019 +0000 |
| committer | Michael Ellerman <mpe@ellerman.id.au> | Sun Apr 21 23:11:46 2019 +1000 |
| tree | 80890f996c246cd567e2822230b68340919adebf | |
| parent | 2679f9bd0abafb3044bcbaac0600b32159ac8bf2 [diff] |
powerpc/32s: Implement Kernel Userspace Execution Prevention. To implement Kernel Userspace Execution Prevention, this patch sets NX bit on all user segments on kernel entry and clears NX bit on all user segments on kernel exit. Note that powerpc 601 doesn't have the NX bit, so KUEP will not work on it. A warning is displayed at startup. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>