mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-12-28 16:56:26 +00:00
d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/* 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
|