[review] core: AES-GCM: import table based GF-mult

Sets CFG_AES_GCM_TABLE_BASED to default y unless CFG_CRYPTO_WITH_CE is
y, then CFG_AES_GCM_TABLE_BASED forced n.

With tables performance is on HiKey960 (CFG_CRYPTO_WITH_CE=n):
xtest --aes-perf -m GCM
(CFG_AES_GCM_TABLE_BASED=n)
min=69.27us max=86.458us mean=70.5695us stddev=0.955826us (cv 1.35445%) (13.8383MiB/s)
(CFG_AES_GCM_TABLE_BASED=y)
min=41.666us max=53.646us mean=42.138us stddev=0.621345us (cv 1.47455%) (23.1753MiB/s)

Signed-off-by: Jens Wiklander <[email protected]>

core/crypto.mk

@@ -41,6 +41,7 @@ CFG_CRYPTO_AES_GCM_FROM_CRYPTOLIB ?= n
 
 endif
 
+
 ifeq ($(CFG_WITH_PAGER),y)
 ifneq ($(CFG_CRYPTO_SHA256),y)
 $(warning Warning: Enabling CFG_CRYPTO_SHA256 [required by CFG_WITH_PAGER])
@@ -49,17 +50,27 @@ endif
 endif
 
 ifeq ($(CFG_CRYPTO_WITH_CE),y)
+
+$(call force,CFG_AES_GCM_TABLE_BASED,n,conflicts with CFG_CRYPTO_WITH_CE)
+
 ifeq ($(CFG_ARM32_core),y)
 CFG_CRYPTO_AES_ARM32_CE ?= $(CFG_CRYPTO_AES)
 CFG_CRYPTO_SHA1_ARM32_CE ?= $(CFG_CRYPTO_SHA1)
 CFG_CRYPTO_SHA256_ARM32_CE ?= $(CFG_CRYPTO_SHA256)
 endif
+
 ifeq ($(CFG_ARM64_core),y)
 CFG_CRYPTO_AES_ARM64_CE ?= $(CFG_CRYPTO_AES)
 CFG_CRYPTO_SHA1_ARM64_CE ?= $(CFG_CRYPTO_SHA1)
 CFG_CRYPTO_SHA256_ARM64_CE ?= $(CFG_CRYPTO_SHA256)
 endif
-endif
+
+else #CFG_CRYPTO_WITH_CE
+
+CFG_AES_GCM_TABLE_BASED ?= y
+
+endif #!CFG_CRYPTO_WITH_CE
+
 
 # Cryptographic extensions can only be used safely when OP-TEE knows how to
 # preserve the VFP context