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kernel: add platform_has() infrastructure

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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>
This commit is contained in:
Juergen Gross
2022-06-02 15:05:26 +02:00
parent f2906aa863
commit 2130a790ca
6 changed files with 60 additions and 1 deletions
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8
include/asm-generic/platform-feature.h Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_PLATFORM_FEATURE_H
#define _ASM_GENERIC_PLATFORM_FEATURE_H
/* Number of arch specific feature flags. */
#define PLATFORM_ARCH_FEAT_N 0
#endif /* _ASM_GENERIC_PLATFORM_FEATURE_H */