ARM: 7982/1: introduce HWCAP2 feature bits for ARMv8 Crypto Extensions

This allocates feature bits 0-4 in HWCAP2 for the crypto and CRC
extensions introduced in ARMv8.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 10 insertions, 0 deletions

diff --git a/arch/arm/include/uapi/asm/hwcap.h b/arch/arm/include/uapi/asm/hwcap.h
index 87768b5cffd1..20d12f230a2f 100644
--- a/arch/arm/include/uapi/asm/hwcap.h
+++ b/arch/arm/include/uapi/asm/hwcap.h
@@ -31,5 +31,10 @@
 /*
  * HWCAP2 flags - for elf_hwcap2 (in kernel) and AT_HWCAP2
  */
+#define HWCAP2_AES      (1 << 0)
+#define HWCAP2_PMULL    (1 << 1)
+#define HWCAP2_SHA1     (1 << 2)
+#define HWCAP2_SHA2     (1 << 3)
+#define HWCAP2_CRC32    (1 << 4)
 
 #endif /* _UAPI__ASMARM_HWCAP_H */
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index dbb5449d6b79..0a6c70b0b0f9 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -1009,6 +1009,11 @@ static const char *hwcap_str[] = {
 };
 
 static const char *hwcap2_str[] = {
+        "aes",
+        "pmull",
+        "sha1",
+        "sha2",
+        "crc32",
         NULL
 };