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From 8b67c22b057e158f61c9fdd5b01f37195c6f5ca4 Mon Sep 17 00:00:00 2001
From: Alexander Kanavin <alex.kanavin@gmail.com>
Date: Wed, 18 Dec 2019 12:29:50 +0100
Subject: [PATCH] freebl: add a configure option to disable ARM HW crypto
Not all current hardware supports it, particularly anything
prior to armv8 does not.
Upstream-Status: Pending
Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
---
nss/lib/freebl/Makefile | 4 ++++
nss/lib/freebl/gcm.c | 2 ++
2 files changed, 6 insertions(+)
--- a/nss/lib/freebl/Makefile
+++ b/nss/lib/freebl/Makefile
@@ -126,6 +126,8 @@ else
endif
endif
ifdef NS_USE_GCC
+ifdef NSS_USE_ARM_HW_CRYPTO
+ DEFINES += -DNSS_USE_ARM_HW_CRYPTO
ifeq ($(CPU_ARCH),aarch64)
DEFINES += -DUSE_HW_AES -DUSE_HW_SHA1 -DUSE_HW_SHA2
EXTRA_SRCS += aes-armv8.c gcm-aarch64.c sha1-armv8.c sha256-armv8.c
@@ -150,6 +152,7 @@ endif
endif
endif
endif
+endif
ifeq ($(OS_TARGET),OSF1)
DEFINES += -DMP_ASSEMBLY_MULTIPLY -DMP_NO_MP_WORD
--- a/nss/lib/freebl/gcm.c
+++ b/nss/lib/freebl/gcm.c
@@ -21,7 +21,9 @@
/* old gcc doesn't support some poly64x2_t intrinsic */
#if defined(__aarch64__) && defined(IS_LITTLE_ENDIAN) && \
(defined(__clang__) || defined(__GNUC__) && __GNUC__ > 6)
+# ifdef NSS_USE_ARM_HW_CRYPTO
#define USE_ARM_GCM
+# endif
#elif defined(__arm__) && defined(IS_LITTLE_ENDIAN) && \
!defined(NSS_DISABLE_ARM32_NEON)
/* We don't test on big endian platform, so disable this on big endian. */
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