mirror of
https://github.com/torvalds/linux.git
synced 2025-11-01 00:58:39 +02:00
2130a790ca
Add a simple infrastructure for setting, resetting and querying platform feature flags. Flags can be either global or architecture specific. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> Tested-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> # Arm64 only Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Borislav Petkov <bp@suse.de> Signed-off-by: Juergen Gross <jgross@suse.com>
27 lines
654 B
C
27 lines
654 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/cache.h>
|
|
#include <linux/export.h>
|
|
#include <linux/platform-feature.h>
|
|
|
|
#define PLATFORM_FEAT_ARRAY_SZ BITS_TO_LONGS(PLATFORM_FEAT_N)
|
|
static unsigned long __read_mostly platform_features[PLATFORM_FEAT_ARRAY_SZ];
|
|
|
|
void platform_set(unsigned int feature)
|
|
{
|
|
set_bit(feature, platform_features);
|
|
}
|
|
EXPORT_SYMBOL_GPL(platform_set);
|
|
|
|
void platform_clear(unsigned int feature)
|
|
{
|
|
clear_bit(feature, platform_features);
|
|
}
|
|
EXPORT_SYMBOL_GPL(platform_clear);
|
|
|
|
bool platform_has(unsigned int feature)
|
|
{
|
|
return test_bit(feature, platform_features);
|
|
}
|
|
EXPORT_SYMBOL_GPL(platform_has);
|