powerpc/book3s64/pkeys: Add MMU_FTR_PKEY

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Parse storage keys related device tree entry in early_init_devtree
and enable MMU feature MMU_FTR_PKEY if pkeys are supported.

MMU feature is used instead of CPU feature because this enables us
to group MMU_FTR_KUAP and MMU_FTR_PKEY in asm feature fixup code.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200709032946.881753-14-aneesh.kumar@linux.ibm.com

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Aneesh Kumar K.V 2020-07-09 08:59:36 +05:30 • committed by Michael Ellerman

parent 3e4352aeb8

commit d3cd91fb8d

4 changed files with 51 additions and 22 deletions

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6

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

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10

arch/powerpc/include/asm/mmu.h

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5

arch/powerpc/kernel/prom.c

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52

arch/powerpc/mm/book3s64/pkeys.c

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