Messages in this thread Patch in this message | | | From | Christophe Leroy <> | Subject | [PATCH] powerpc/uaccess: Don't set KUEP by default on book3s/32 | Date | Wed, 15 Apr 2020 14:57:11 +0000 (UTC) |
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On book3s/32, KUEP is an heavy process as it requires to set/unset the NX bit in each of the 12 user segments everytime the kernel is entered/exited from/to user space.
Don't select KUEP by default on book3s/32.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> --- arch/powerpc/platforms/Kconfig.cputype | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 0c7151c98b56..11412078e732 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -377,7 +377,7 @@ config PPC_HAVE_KUEP config PPC_KUEP bool "Kernel Userspace Execution Prevention" depends on PPC_HAVE_KUEP - default y + default y if !PPC_BOOK3S_32 help Enable support for Kernel Userspace Execution Prevention (KUEP) -- 2.25.0
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