arm64: Add hwcaps for crypto and CRC32 extensions.

Advertise the optional cryptographic and CRC32 instructions to
user space where present. Several hwcap bits [3-7] are allocated.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
[bit 2 is taken now so use bits 3-7 instead]
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h
index 9b12476e9c85..73cf0f54d57c 100644
--- a/arch/arm64/include/uapi/asm/hwcap.h
+++ b/arch/arm64/include/uapi/asm/hwcap.h
@@ -22,6 +22,10 @@
 #define HWCAP_FP                (1 << 0)
 #define HWCAP_ASIMD             (1 << 1)
 #define HWCAP_EVTSTRM           (1 << 2)
-
+#define HWCAP_AES               (1 << 3)
+#define HWCAP_PMULL             (1 << 4)
+#define HWCAP_SHA1              (1 << 5)
+#define HWCAP_SHA2              (1 << 6)
+#define HWCAP_CRC32             (1 << 7)
 
 #endif /* _UAPI__ASM_HWCAP_H */