| /* | |
| * 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 */ |