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68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
/** Linux kernel related functions.
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*
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* @file
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* @author Steffen Vogel <post@steffenvogel.de>
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* @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
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* @license Apache License 2.0
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*********************************************************************************/
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#pragma once
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#include <cstddef>
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#include <villas/version.hpp>
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namespace villas {
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namespace kernel {
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// Get the version of the kernel.
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utils::Version getVersion();
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// Get number of reserved hugepages.
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int getNrHugepages();
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// Set number of reserved hugepages.
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int setNrHugepages(int nr);
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// Get kernel cmdline parameter
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//
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// See https://www.kernel.org/doc/Documentation/kernel-parameters.txt
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//
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// @param param The cmdline parameter to look for.
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// @param buf The string buffer to which the parameter value will be copied to.
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// @param len The length of the buffer \p value
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// @retval 0 Parameter \p key was found and value was copied to \p value
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// @reval <>0 Kernel was not booted with parameter \p key
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int getCmdlineParam(const char *param, char *buf, size_t len);
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/** Checks if a kernel module is loaded
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*
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* @param module the name of the module
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* @retval 0 Module is loaded.
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* @reval <>0 Module is not loaded.
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*/
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int isModuleLoaded(const char *module);
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// Load kernel module via modprobe
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int loadModule(const char *module);
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// Set parameter of loaded kernel module
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int setModuleParam(const char *module, const char *param, const char *value);
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// Get cacheline size in bytes
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int getCachelineSize();
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// Get the size of a standard page in bytes.
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int getPageSize();
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// Get the size of a huge page in bytes.
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int getHugePageSize();
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// Get CPU base frequency
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int get_cpu_frequency(uint64_t *freq);
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// Set SMP affinity of IRQ
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int setIRQAffinity(unsigned irq, uintmax_t aff , uintmax_t *old);
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} // namespace villas
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} // namespace kernel
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