[PATCH 1/2] powerpc/mm: fix up pgtable dump flags

[Michael Ellerman]

Rashmica Gupta <rashmica.g at gmail.com> writes:

> On 31/03/17 12:37, Oliver O'Halloran wrote:
>> On Book3s we have two PTE flags used to mark cache-inhibited mappings:
>> _PAGE_TOLERANT and _PAGE_NON_IDEMPOTENT. Currently the kernel page
>> table dumper only looks at the generic _PAGE_NO_CACHE which is
>> defined to be _PAGE_TOLERANT. This patch modifies the dumper so
>> both flags are shown in the dump.
>>
>> Cc: Rashmica Gupta <rashmica.g at gmail.com>
>> Signed-off-by: Oliver O'Halloran <oohall at gmail.com>

> Should we also add in _PAGE_SAO  that is in Book3s?

I don't think we ever expect to see it in the kernel page tables. But if
we did that would be "interesting".

I've forgotten what the code does with unknown bits, does it already
print them in some way?

If not we should either add that or add _PAGE_SAO and everything else
that could possibly ever be there.

cheers