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author	Christophe Leroy <christophe.leroy@c-s.fr>
	Mon, 11 Mar 2019 08:30:35 +0000 (08:30 +0000)
committer	Michael Ellerman <mpe@ellerman.id.au>
	Sun, 21 Apr 2019 13:11:46 +0000 (23:11 +1000)
commit	31ed2b13c48d779efc838ad54e30121e088a62af
tree	80890f996c246cd567e2822230b68340919adebf	tree \| snapshot
parent	2679f9bd0abafb3044bcbaac0600b32159ac8bf2	commit \| 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>

John Crispins staging tree

RSS Atom

arch/powerpc/include/asm/book3s/32/kup.h	[new file with mode: 0644]	blob
arch/powerpc/include/asm/book3s/32/mmu-hash.h		diff \| blob \| history
arch/powerpc/include/asm/kup.h		diff \| blob \| history
arch/powerpc/kernel/entry_32.S		diff \| blob \| history
arch/powerpc/kernel/head_32.S		diff \| blob \| history
arch/powerpc/mm/ppc_mmu_32.c		diff \| blob \| history
arch/powerpc/platforms/Kconfig.cputype		diff \| blob \| history