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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org> */
#ifndef __LINUX_CPUFEATURE_H#define __LINUX_CPUFEATURE_H
#ifdef CONFIG_GENERIC_CPU_AUTOPROBE
#include <linux/init.h>#include <linux/mod_devicetable.h>#include <asm/cpufeature.h>
/* * Macros imported from <asm/cpufeature.h>: * - cpu_feature(x) ordinal value of feature called 'x' * - cpu_have_feature(u32 n) whether feature #n is available * - MAX_CPU_FEATURES upper bound for feature ordinal values * Optional: * - CPU_FEATURE_TYPEFMT format string fragment for printing the cpu type * - CPU_FEATURE_TYPEVAL set of values matching the format string above */
#ifndef CPU_FEATURE_TYPEFMT#define CPU_FEATURE_TYPEFMT "%s"#endif
#ifndef CPU_FEATURE_TYPEVAL#define CPU_FEATURE_TYPEVAL ELF_PLATFORM#endif
/* * Use module_cpu_feature_match(feature, module_init_function) to * declare that * a) the module shall be probed upon discovery of CPU feature 'feature' * (typically at boot time using udev) * b) the module must not be loaded if CPU feature 'feature' is not present * (not even by manual insmod). * * For a list of legal values for 'feature', please consult the file * 'asm/cpufeature.h' of your favorite architecture. */#define module_cpu_feature_match(x, __initfunc) \static struct cpu_feature const __maybe_unused cpu_feature_match_ ## x[] = \ { { .feature = cpu_feature(x) }, { } }; \MODULE_DEVICE_TABLE(cpu, cpu_feature_match_ ## x); \ \static int __init cpu_feature_match_ ## x ## _init(void) \{ \ if (!cpu_have_feature(cpu_feature(x))) \ return -ENODEV; \ return __initfunc(); \} \module_init(cpu_feature_match_ ## x ## _init)
#endif#endif