wolfssl: disable AES-NI by default for x86_64

WolfSSL is crashing with an illegal opcode in some x86_64 CPUs that have
AES instructions but lack other extensions that are used by WolfSSL
when AES-NI is enabled.

Disable the option by default for now until the issue is properly fixed.
People can enable them in a custom build if they are sure it will work
for them.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

diff --git a/package/libs/wolfssl/Config.in b/package/libs/wolfssl/Config.in
index 3d264e77430cd590890263bc49aa0894e80d9b06..eca9572c490a1693e76208411c4df104726603af 100644 (file)
--- a/package/libs/wolfssl/Config.in
+++ b/package/libs/wolfssl/Config.in
@@ -68,7 +68,7 @@ config WOLFSSL_ASM_CAPABLE
 
 choice
        prompt "Hardware Acceleration"
-       default WOLFSSL_HAS_CPU_CRYPTO if WOLFSSL_ASM_CAPABLE
+       default WOLFSSL_HAS_CPU_CRYPTO if WOLFSSL_ASM_CAPABLE && !x86_64
        default WOLFSSL_HAS_NO_HW
 
        config WOLFSSL_HAS_NO_HW
@@ -80,6 +80,7 @@ choice
                help
                This will use Intel AESNI insturctions or armv8 Crypto Extensions.
                Either of them should easily outperform hardware crypto in WolfSSL.
+               Beware that for Intel, the CPU has to support SSE4 instructions.
 
        config WOLFSSL_HAS_AFALG
                bool "AF_ALG"
@@ -96,5 +97,9 @@ choice
                bool "/dev/crypto - full"
                select WOLFSSL_HAS_DEVCRYPTO
 endchoice
+if x86_64 && WOLFSSL_HAS_CPU_CRYPTO
+       comment "WARNING: make sure your CPU supports SSE4 instructions"
+       comment "WolfSSL may crash with an invalid opcode exception"
+endif
 
 endif