Aneesh Kumar K.V bd77c44986 powerpc/mm/radix: Use tlbiel only if we ever ran on the current cpu ... Before this patch, we used tlbiel, if we ever ran only on this core. That was mostly derived from the nohash usage of the same. But is incorrect, the ISA 3.0 clarifies tlbiel such that: "All TLB entries that have all of the following properties are made invalid on the thread executing the tlbiel instruction" ie. tlbiel only invalidates TLB entries on the current thread. So if the mm has been used on any other thread (aka. cpu) then we must broadcast the invalidate. This bug could lead to invalid TLB entries if a program runs on multiple threads of a core. Hence use tlbiel, if we only ever ran on only the current cpu. Fixes: 1a472c9dba ("powerpc/mm/radix: Add tlbflush routines") Cc: stable@vger.kernel.org # v4.7+ Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2016-10-27 21:55:13 +11:00
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asm	powerpc/mm/radix: Use tlbiel only if we ever ran on the current cpu	2016-10-27 21:55:13 +11:00
uapi/asm	powerpc/ptrace: Enable support for Performance Monitor registers	2016-08-01 11:15:24 +10:00