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1eddf187e5
In the following patches we will enable LBR capture on AMD CPUs at arbitrary point in time, which means that LBR recording won't be frozen by hardware automatically as part of hardware overflow event. So we need to take care to minimize amount of branches and function calls/returns on the path to freezing LBR, minimizing LBR snapshot altering as much as possible. As such, split out LBR disabling logic from the sanity checking logic inside amd_pmu_lbr_disable_all(). This will ensure that no branches are taken before LBR is frozen in the functionality added in the next patch. Use __always_inline to also eliminate any possible function calls. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Sandipan Das <sandipan.das@amd.com> Link: https://lore.kernel.org/r/20240402022118.1046049-3-andrii@kernel.org |
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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.