1b785611e1
In order to make ATS work and translate addresses for arbitrary LPID and PID, we need to program an NPU with LPID and allow PID wildcard matching with a specific MSR mask. This implements a helper to assign a GPU to LPAR and program the NPU with a wildcard for PID and a helper to do clean-up. The helper takes MSR (only DR/HV/PR/SF bits are allowed) to program them into NPU2 for ATS checkout requests support. This exports pnv_npu2_unmap_lpar_dev() as following patches will use it from the VFIO driver. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.