[v3,12/16] cxl: Add base builtin support

[Michael Ellerman]

On Tue, 2014-07-10 at 10:48:18 UTC, Michael Neuling wrote:
> From: Ian Munsie <imunsie at au1.ibm.com>
> 
> This adds the base cxl support that needs to be build into the kernel to use
> cxl as a module. This is needed so that the cxl call backs from the core
> powerpc mm code always exist irrespective of if the cxl module is loaded or
> not. This is similar to how cell works with CONFIG_SPU_BASE.
> 
> This adds a cxl_slbia() call (similar to spu_flush_all_slbs()) which checks for
> the cxl module being loaded. If the modules is not loaded we return, otherwise
> we call into the cxl SLB invalidation code.
> 
> This also adds the cxl_ctx_in_use() function for use in the mm code to see if
> any cxl contexts are currently in use. This is used by the tlbie() to
> determine if it can do local TLB invalidations or not. This also adds get/put
> calls for the cxl driver module to refcount the active cxl contexts.

This last paragraph is no longer true.

cheers