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(parent: 2679f9b) | patch
powerpc/32s: Implement Kernel Userspace Execution Prevention.
authorChristophe Leroy <christophe.leroy@c-s.fr>
Mon, 11 Mar 2019 08:30:35 +0000 (08:30 +0000)
committerMichael Ellerman <mpe@ellerman.id.au>
Sun, 21 Apr 2019 13:11:46 +0000 (23:11 +1000)
commit31ed2b13c48d779efc838ad54e30121e088a62af
tree80890f996c246cd567e2822230b68340919adebftree
parent2679f9bd0abafb3044bcbaac0600b32159ac8bf2commit | 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>
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
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