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Identifying the underlying RISC-V implementation can be important for some of the user space applications. For example, the perf tool uses arch specific CPU implementation id (i.e. CPUID) to select a JSON file describing custom perf events on a CPU. Currently, there is no way to identify RISC-V implementation so we add mvendorid, marchid, and mimpid to /proc/cpuinfo output. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Tested-by: Nikita Shubin <n.shubin@yadro.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20220727043829.151794-1-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.