Re: [PATCH] powerpc: add PPC_FEATURE userspace bits for SCV and DARN instructions

2017-05-21 Thread Benjamin Herrenschmidt
On Sat, 2017-05-20 at 14:29 +1000, Nicholas Piggin wrote: > Providing "scv" support to userspace requires kernel support, so it > must be advertised as independently to the base ISA 3 instruction set. > > The darn instruction relies on firmware enablement, so it has been > decided to split this ou

[PATCH] powerpc: add PPC_FEATURE userspace bits for SCV and DARN instructions

2017-05-19 Thread Nicholas Piggin
Providing "scv" support to userspace requires kernel support, so it must be advertised as independently to the base ISA 3 instruction set. The darn instruction relies on firmware enablement, so it has been decided to split this out from the core ISA 3 feature as well. Signed-off-by: Nicholas Pigg