Re: [v4, 1/7] powerpc/64s/radix: do not flush TLB when relaxing access

2018-06-04 Thread Michael Ellerman
On Fri, 2018-06-01 at 10:01:15 UTC, Nicholas Piggin wrote: > Radix flushes the TLB when updating ptes to increase permissiveness > of protection (increase access authority). Book3S does not require > TLB flushing in this case, and it is not done on hash. This patch > avoids the flush for radix. >

[PATCH v4 1/7] powerpc/64s/radix: do not flush TLB when relaxing access

2018-06-01 Thread Nicholas Piggin
Radix flushes the TLB when updating ptes to increase permissiveness of protection (increase access authority). Book3S does not require TLB flushing in this case, and it is not done on hash. This patch avoids the flush for radix. >From Power ISA v3.0B, p.1090: Setting a Reference or Change