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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * Module interface for CPU features
- *
- * Copyright IBM Corp. 2015
- * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
- */
- #ifndef __ASM_S390_CPUFEATURE_H
- #define __ASM_S390_CPUFEATURE_H
- #include <asm/elf.h>
- /* Hardware features on Linux on z Systems are indicated by facility bits that
- * are mapped to the so-called machine flags. Particular machine flags are
- * then used to define ELF hardware capabilities; most notably hardware flags
- * that are essential for user space / glibc.
- *
- * Restrict the set of exposed CPU features to ELF hardware capabilities for
- * now. Additional machine flags can be indicated by values larger than
- * MAX_ELF_HWCAP_FEATURES.
- */
- #define MAX_ELF_HWCAP_FEATURES (8 * sizeof(elf_hwcap))
- #define MAX_CPU_FEATURES MAX_ELF_HWCAP_FEATURES
- #define cpu_feature(feat) ilog2(HWCAP_S390_ ## feat)
- int cpu_have_feature(unsigned int nr);
- #endif /* __ASM_S390_CPUFEATURE_H */
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