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-rw-r--r--arch/arm64/include/asm/cpufeature.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index cd4ac0516488..20b2b3d6b702 100644
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -21,9 +21,29 @@
#define MAX_CPU_FEATURES (8 * sizeof(elf_hwcap))
#define cpu_feature(x) ilog2(HWCAP_ ## x)
+#define NCAPS 0
+
+extern DECLARE_BITMAP(cpu_hwcaps, NCAPS);
+
static inline bool cpu_have_feature(unsigned int num)
{
return elf_hwcap & (1UL << num);
}
+static inline bool cpus_have_cap(unsigned int num)
+{
+ if (num >= NCAPS)
+ return false;
+ return test_bit(num, cpu_hwcaps);
+}
+
+static inline void cpus_set_cap(unsigned int num)
+{
+ if (num >= NCAPS)
+ pr_warn("Attempt to set an illegal CPU capability (%d >= %d)\n",
+ num, NCAPS);
+ else
+ __set_bit(num, cpu_hwcaps);
+}
+
#endif