KVM: PPC: Book3S HV: radix: Refine IO region partition scope attributes

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When the radix fault handler has no page from the process address
space (e.g., for IO memory), it looks up the process pte and sets
partition table pte using that to get attributes like CI and guarded.
If the process table entry is to be writable, set _PAGE_DIRTY as well
to avoid an RC update. If not, then ensure _PAGE_DIRTY does not come
across. Set _PAGE_ACCESSED as well to avoid RC update.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

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Nicholas Piggin 2018-05-17 17:06:30 +10:00 • committed by Paul Mackerras

parent 9a4506e11b

commit bc64dd0e1c

1 changed files with 7 additions and 3 deletions

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arch/powerpc/kvm/book3s_64_mmu_radix.c

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