On Sun, Oct 14, 2018 at 4:19 PM Oliver O'Halloran <ooh...@gmail.com> wrote: > > Adds a driver that implements support for enabling and accessing PAPR > SCM regions. Unfortunately due to how the PAPR interface works we can't > use the existing of_pmem driver (yet) because: > > a) The guest is required to use the H_SCM_BIND_MEM h-call to add > add the SCM region to it's physical address space, and > b) There is currently no mechanism for relating a bare of_pmem region > to the backing DIMM (or not-a-DIMM for our case). > > Both of these are easily handled by rolling the functionality into a > seperate driver so here we are... > > Acked-by: Dan Williams <dan.j.willi...@intel.com> > Signed-off-by: Oliver O'Halloran <ooh...@gmail.com> > --- > The alternative implementation here is that we have the pseries code > do the h-calls and craft a pmem-region@<addr> node based on that. > However, that doesn't solve b) and mpe has expressed his dislike of > adding new stuff to the DT at runtime so i'd say that's a non-starter. > --- > v2: no change > v3: Corrected the mapping to use a DPA start address of zero > Added cond_resched() calls in the bind/unbind loops
Looks good, could I trouble you for an ack on the build / merge fix? https://patchwork.kernel.org/patch/10640385/
