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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-03-11 09:30:35 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-04-21 15:11:46 +0200 |
| commit | 31ed2b13c48d779efc838ad54e30121e088a62af (patch) | |
| tree | 80890f996c246cd567e2822230b68340919adebf /arch/powerpc/platforms | |
| parent | powerpc/8xx: Add Kernel Userspace Access Protection (diff) | |
| download | linux-31ed2b13c48d779efc838ad54e30121e088a62af.tar.xz linux-31ed2b13c48d779efc838ad54e30121e088a62af.zip | |
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>
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/Kconfig.cputype | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index ab586963893a..6bc0a4c08c1c 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -25,6 +25,7 @@ config PPC_BOOK3S_32 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx" select PPC_FPU select PPC_HAVE_PMU_SUPPORT + select PPC_HAVE_KUEP config PPC_85xx bool "Freescale 85xx" |