[openwrt/openwrt] wolfssl: disable AES-NI by default for x86_64

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch openwrt-22.03:
https://git.openwrt.org/f91b0d7a92c5927db9eb6610628d931e3104cd41

commit f91b0d7a92c5927db9eb6610628d931e3104cd41
Author: Eneas U de Queiroz <cotequeiroz at gmail.com>
AuthorDate: Tue Jun 21 15:21:44 2022 -0300

    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 at gmail.com>
    (cherry picked from commit 0bd536723303ccd178e289690d073740c928bb34)
---
 package/libs/wolfssl/Config.in | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/package/libs/wolfssl/Config.in b/package/libs/wolfssl/Config.in
index 3d264e7743..eca9572c49 100644
--- 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