KVM: PPC: Book3S HV: radix: Do not clear partition PTE when RC or write bits do not match

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Adding the write bit and RC bits to pte permissions does not require a
pte clear and flush. There should not be other bits changed here,
because restricting access or changing the PFN must have already
invalidated any existing ptes (otherwise the race is already lost).

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 17:06:31 +10:00 • committed by Paul Mackerras

parent bc64dd0e1c

commit 878cf2bb2d

1 changed files with 47 additions and 21 deletions

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arch/powerpc/kvm/book3s_64_mmu_radix.c

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