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The RISC-V ISA defines a core set of performance counters that must exist on all processors along with a standard way to add more performance counters. This patch set adds preliminary perf support for RISC-V systems. Long term we'll move to model where all PMUs can be built into the kernel at the same time, detected at runtime (possibly via device tree), and provided to userspace. Since we currently only support the ISA-mandated performance counters there's no need to detect anything right now. Signed-off-by: Palmer Dabbelt <palmer@sifive.com> |
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README |
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. See Documentation/00-INDEX for a list of what is contained in each file. 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.