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27e4a6523e
In current design, the user of perf app needs to input counter ID to count events. However, this is not user-friendly since the user needs to lookup the map table to find the counter. Instead of letting the user to input the counter, let this driver to manage the counters in this patch. This will be implemented by: 1. allocate counter 0 for cycle event. 2. find unused counter from 1-10 for reference events. 3. allocate specific counter for counter-specific events. In this patch, counter attr will be kept for back-compatible but all the value passed down by counter=<n> will be ignored. To mark counter-specific events, counter ID will be encoded into perf_pmu_events_attr.id. Reviewed-by: Frank Li <Frank.Li@nxp.com> Signed-off-by: Xu Yang <xu.yang_2@nxp.com> Link: https://lore.kernel.org/r/20240529080358.703784-3-xu.yang_2@nxp.com Signed-off-by: Will Deacon <will@kernel.org>
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 reStructuredText 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.