powerpc/book3s64/pkeys: Reset userspace AMR correctly on exec

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On fork, we inherit from the parent and on exec, we should switch to default_amr values.

Also, avoid changing the AMR register value within the kernel. The kernel now runs with
different AMR values.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-13-aneesh.kumar@linux.ibm.com

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Aneesh Kumar K.V 2020-11-27 10:14:14 +05:30 • committed by Michael Ellerman

parent f643fcab74

commit d5fa30e699

3 changed files with 9 additions and 15 deletions

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2

arch/powerpc/include/asm/book3s/64/pkeys.h

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6

arch/powerpc/kernel/process.c

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16

arch/powerpc/mm/book3s64/pkeys.c

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