2 files changed, 8 insertions, 2 deletions

diff --git a/arch/arm/include/uapi/asm/hwcap.h b/arch/arm/include/uapi/asm/hwcap.h
index 3688fd15a32d..6d34d080372a 100644
--- a/arch/arm/include/uapi/asm/hwcap.h
+++ b/arch/arm/include/uapi/asm/hwcap.h
@@ -25,6 +25,6 @@
 #define HWCAP_IDIVT     (1 << 18)
 #define HWCAP_VFPD32    (1 << 19)       /* set if VFP has 32 regs (not 16) */
 #define HWCAP_IDIV      (HWCAP_IDIVA | HWCAP_IDIVT)
-
+#define HWCAP_LPAE      (1 << 20)
 
 #endif /* _UAPI__ASMARM_HWCAP_H */
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 1522c7ae31b0..bdcd4dd13230 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -355,7 +355,7 @@ void __init early_print(const char *str, ...)
 
 static void __init cpuid_init_hwcaps(void)
 {
-        unsigned int divide_instrs;
+        unsigned int divide_instrs, vmsa;
 
         if (cpu_architecture() < CPU_ARCH_ARMv7)
                 return;
@@ -368,6 +368,11 @@ static void __init cpuid_init_hwcaps(void)
         case 1:
                 elf_hwcap |= HWCAP_IDIVT;
         }
+
+        /* LPAE implies atomic ldrd/strd instructions */
+        vmsa = (read_cpuid_ext(CPUID_EXT_MMFR0) & 0xf) >> 0;
+        if (vmsa >= 5)
+                elf_hwcap |= HWCAP_LPAE;
 }
 
 static void __init feat_v6_fixup(void)
@@ -872,6 +877,7 @@ static const char *hwcap_str[] = {
         "vfpv4",
         "idiva",
         "idivt",
+        "lpae",
         NULL
 };