Aneesh Kumar K.V dc891849e0 powerpc/kvm/nested: Add helper to walk nested shadow linux page table.
The locking rules for walking nested shadow linux page table is different from process
scoped table. Hence add a helper for nested page table walk and also
add check whether we are holding the right locks.

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/20200505071729.54912-11-aneesh.kumar@linux.ibm.com
2020-05-05 21:20:15 +10:00
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