From c35aa1d9a24c0a58c2d950866a6ebea025af3d22 Mon Sep 17 00:00:00 2001
From: Angus Gratton <angus@espressif.com>
Date: Wed, 5 Jul 2017 12:03:00 +0800
Subject: [PATCH] mbedtls: Temporarily disable hardware acceleration in
 dual-core mode

Temporary fix, until DPORT bugs in crypto accelerators are completely fixed.
---
 components/mbedtls/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/components/mbedtls/Kconfig b/components/mbedtls/Kconfig
index 015635a78..57a73584f 100644
--- a/components/mbedtls/Kconfig
+++ b/components/mbedtls/Kconfig
@@ -31,14 +31,25 @@ config MBEDTLS_DEBUG
 	   at runtime in order to enable mbedTLS debug output via the ESP
 	   log mechanism.
 
+config MBEDTLS_UNSAFE_ACCELERATION
+   bool "Allow buggy hardware acceleration features"
+   depends on !FREERTOS_UNICORE
+   default n
+   help
+       A bug currently prevents dual cores & crypto hardware acceleration from being used together.
+
+       Enable this option to allow hardware acceleration anyhow (note that invalid results or crashes may occur.)
+
 config MBEDTLS_HARDWARE_AES
    bool "Enable hardware AES acceleration"
+   depends on MBEDTLS_UNSAFE_ACCELERATION || FREERTOS_UNICORE
    default y
    help
        Enable hardware accelerated AES encryption & decryption.
 
 config MBEDTLS_HARDWARE_MPI
    bool "Enable hardware MPI (bignum) acceleration"
+   depends on MBEDTLS_UNSAFE_ACCELERATION || FREERTOS_UNICORE
    default y
    help
        Enable hardware accelerated multiple precision integer operations.
@@ -60,6 +71,7 @@ config MBEDTLS_MPI_USE_INTERRUPT
 
 config MBEDTLS_HARDWARE_SHA
    bool "Enable hardware SHA acceleration"
+   depends on MBEDTLS_UNSAFE_ACCELERATION || FREERTOS_UNICORE
    default y
    help
        Enable hardware accelerated SHA1, SHA256, SHA384 & SHA512 in mbedTLS.