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5fa23530d4
It is useful to have helper function just to get the number of cache levels for a given logical cpu. We can obtain the same by just checking the level at which the last cache is present. This patch adds support to find the level of the last cache for a given cpu. It will be used on ARM64 platform where the device tree provides the information for the additional non-architected/transparent/external last level caches that are not integrated with the processors. Cc: Mark Rutland <mark.rutland@arm.com> Suggested-by: Rob Herring <robh+dt@kernel.org> Acked-by: Rob Herring <robh+dt@kernel.org> Tested-by: Tan Xiaojun <tanxiaojun@huawei.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> [will: use u32 instead of int for cache_level] Signed-off-by: Will Deacon <will.deacon@arm.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.