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