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From 7c8f367faf8848a43a414079189e10270d6c0fcc 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 | 3 +++
nss/lib/freebl/gcm.c | 2 ++
2 files changed, 5 insertions(+)
diff --git a/nss/lib/freebl/Makefile b/nss/lib/freebl/Makefile
index 7ee8736..f9b4925 100644
--- a/nss/lib/freebl/Makefile
+++ b/nss/lib/freebl/Makefile
@@ -142,6 +142,8 @@ endif
endif
endif
endif
+ifdef NSS_USE_ARM_HW_CRYPTO
+ DEFINES += -DNSS_USE_ARM_HW_CRYPTO
ifeq ($(CPU_ARCH),aarch64)
ifdef CC_IS_CLANG
DEFINES += -DUSE_HW_AES -DUSE_HW_SHA1 -DUSE_HW_SHA2
@@ -183,6 +185,7 @@ endif
endif
endif
endif
+endif
ifeq (OS2,$(OS_TARGET))
ASFILES = mpi_x86_os2.s
diff --git a/nss/lib/freebl/gcm.c b/nss/lib/freebl/gcm.c
index 2dae724..9ee7fc8 100644
--- a/nss/lib/freebl/gcm.c
+++ b/nss/lib/freebl/gcm.c
@@ -18,6 +18,7 @@
#include <limits.h>
+#ifdef NSS_USE_ARM_HW_CRYPTO
/* old gcc doesn't support some poly64x2_t intrinsic */
#if defined(__aarch64__) && defined(IS_LITTLE_ENDIAN) && \
(defined(__clang__) || defined(__GNUC__) && __GNUC__ > 6)
@@ -27,6 +28,7 @@
/* We don't test on big endian platform, so disable this on big endian. */
#define USE_ARM_GCM
#endif
+#endif
/* Forward declarations */
SECStatus gcm_HashInit_hw(gcmHashContext *ghash);
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