From d467551e7983673472d3f8b6fbddb467104d4422 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Fri, 20 Oct 2017 19:00:50 +0200
Subject: crypto/avx: make sure we can actually use ymm registers

---
 src/crypto/blake2s.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/crypto/blake2s.c')

diff --git a/src/crypto/blake2s.c b/src/crypto/blake2s.c
index 1fe4600..ab37a0c 100644
--- a/src/crypto/blake2s.c
+++ b/src/crypto/blake2s.c
@@ -115,7 +115,7 @@ void blake2s_init_key(struct blake2s_state *state, const size_t outlen, const vo
 static bool blake2s_use_avx __read_mostly = false;
 void __init blake2s_fpu_init(void)
 {
-	blake2s_use_avx = boot_cpu_has(X86_FEATURE_AVX);
+	blake2s_use_avx = boot_cpu_has(X86_FEATURE_AVX) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL);
 }
 asmlinkage void blake2s_compress_avx(struct blake2s_state *state, const u8 * block, size_t nblocks, u32 inc);
 #else
-- 
cgit v1.2.3-59-g8ed1b