From 7905a1f5dff38cc30af873461f083f30893adcbe Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Tue, 18 Sep 2018 02:18:47 +0200
Subject: crypto: allow for disabling simd in zinc modules

---
 src/crypto/zinc/chacha20/chacha20.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/crypto/zinc/chacha20/chacha20.c')

diff --git a/src/crypto/zinc/chacha20/chacha20.c b/src/crypto/zinc/chacha20/chacha20.c
index 2b3644f..ef2404f 100644
--- a/src/crypto/zinc/chacha20/chacha20.c
+++ b/src/crypto/zinc/chacha20/chacha20.c
@@ -172,13 +172,16 @@ void hchacha20(u8 derived_key[CHACHA20_KEY_SIZE],
 }
 EXPORT_SYMBOL(hchacha20);
 
+static bool nosimd __initdata = false;
+
 #ifndef COMPAT_ZINC_IS_A_MODULE
 int __init chacha20_mod_init(void)
 #else
 static int __init mod_init(void)
 #endif
 {
-	chacha20_fpu_init();
+	if (!nosimd)
+		chacha20_fpu_init();
 	return 0;
 }
 
@@ -187,6 +190,7 @@ static void __exit mod_exit(void)
 {
 }
 
+module_param(nosimd, bool, 0);
 module_init(mod_init);
 module_exit(mod_exit);
 MODULE_LICENSE("GPL v2");
-- 
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