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Ido Schimmel says: ==================== mlxsw: spectrum_router: Add GRE tunnel support for Spectrum-2 Nir says: In Spectrum-2, HW implementation of layer 3 tunnels differs from Spectrum-1 when it comes to the underlay routing table selection. Spectrum-2 uses a dedicated RIF that points to the virtual router used for forwarding the encapsulated packets, while Spectrum-1 explicitly specifies the virtual router itself. Patches #1 and #2 add additional fields in RITR - Router interface table register and RTDP - Routing tunnel decap properties respectively, the fields are required for the new underlay RIF needed for Spectrum-2. Patches #3-4 allow different set of RIF operations per ASIC type. The first patch splits the operations and the following patch sets RIF ops according to ASIC type. Patches #5-9 introduce small changes to existing code to allow existence of a dedicated underlay RIF along with the underlay virtual router, and to support that new type of RIF that has no device. Patch #10 takes care of updating the tunnel decap properties egress underlay RIF required for Spectrum-2. Patch #11 adds the implementation of Spectrum-2 specific RIF operations and essentially enables layer 3 GRE tunnels on Spectrum-2. Finally patches #12-18 add tests for GRE IP-in-IP tunnels, both in flat and hierarchical topologies. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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.