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The NVDIMM PMEM driver expects arch specific APIs for cache maintenance and if arch does not provide these APIs then NVDIMM PMEM driver will always use MEMREMAP_WT to map persistent memory which in-turn maps as UC memory type defined by the RISC-V Svpbmt specification. Now that the Svpbmt and Zicbom support is available in RISC-V kernel, we implement PMEM APIs using ALT_CMO_OP() macros so that the NVDIMM PMEM driver can use MEMREMAP_WB to map persistent memory. Co-developed-by: Mayuresh Chitale <mchitale@ventanamicro.com> Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com> Acked-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20221114090536.1662624-3-apatel@ventanamicro.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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.