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From: Ard Biesheuvel <ardb@kernel.org>
To: linux-crypto@vger.kernel.org
Cc: Ard Biesheuvel <ardb@kernel.org>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	David Miller <davem@davemloft.net>,
	"Jason A . Donenfeld" <Jason@zx2c4.com>,
	Samuel Neves <sneves@dei.uc.pt>, Arnd Bergmann <arnd@arndb.de>,
	Eric Biggers <ebiggers@google.com>,
	Andy Lutomirski <luto@kernel.org>,
	Martin Willi <martin@strongswan.org>,
	Rene van Dorst <opensource@vdorst.com>,
	David Sterba <dsterba@suse.com>
Subject: [PATCH v5 17/34] crypto: x86/poly1305 - expose existing driver as poly1305 library
Date: Fri,  8 Nov 2019 13:22:23 +0100
Message-ID: <20191108122240.28479-18-ardb@kernel.org> (raw)
In-Reply-To: <20191108122240.28479-1-ardb@kernel.org>

Implement the arch init/update/final Poly1305 library routines in the
accelerated SIMD driver for x86 so they are accessible to users of
the Poly1305 library interface as well.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/x86/crypto/poly1305_glue.c | 57 ++++++++++++++------
 crypto/Kconfig                  |  1 +
 lib/crypto/Kconfig              |  1 +
 3 files changed, 43 insertions(+), 16 deletions(-)

diff --git a/arch/x86/crypto/poly1305_glue.c b/arch/x86/crypto/poly1305_glue.c
index a5b3a054604c..370cd88068ec 100644
--- a/arch/x86/crypto/poly1305_glue.c
+++ b/arch/x86/crypto/poly1305_glue.c
@@ -10,6 +10,7 @@
 #include <crypto/internal/poly1305.h>
 #include <crypto/internal/simd.h>
 #include <linux/crypto.h>
+#include <linux/jump_label.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <asm/simd.h>
@@ -21,7 +22,8 @@ asmlinkage void poly1305_2block_sse2(u32 *h, const u8 *src, const u32 *r,
 asmlinkage void poly1305_4block_avx2(u32 *h, const u8 *src, const u32 *r,
 				     unsigned int blocks, const u32 *u);
 
-static bool poly1305_use_avx2 __ro_after_init;
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(poly1305_use_simd);
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(poly1305_use_avx2);
 
 static void poly1305_simd_mult(u32 *a, const u32 *b)
 {
@@ -64,7 +66,7 @@ static unsigned int poly1305_simd_blocks(struct poly1305_desc_ctx *dctx,
 	}
 
 	if (IS_ENABLED(CONFIG_AS_AVX2) &&
-	    poly1305_use_avx2 &&
+	    static_branch_likely(&poly1305_use_avx2) &&
 	    srclen >= POLY1305_BLOCK_SIZE * 4) {
 		if (unlikely(dctx->rset < 4)) {
 			if (dctx->rset < 2) {
@@ -103,10 +105,15 @@ static unsigned int poly1305_simd_blocks(struct poly1305_desc_ctx *dctx,
 	return srclen;
 }
 
-static int poly1305_simd_update(struct shash_desc *desc,
-				const u8 *src, unsigned int srclen)
+void poly1305_init_arch(struct poly1305_desc_ctx *desc, const u8 *key)
+{
+	poly1305_init_generic(desc, key);
+}
+EXPORT_SYMBOL(poly1305_init_arch);
+
+void poly1305_update_arch(struct poly1305_desc_ctx *dctx, const u8 *src,
+			  unsigned int srclen)
 {
-	struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
 	unsigned int bytes;
 
 	if (unlikely(dctx->buflen)) {
@@ -117,7 +124,8 @@ static int poly1305_simd_update(struct shash_desc *desc,
 		dctx->buflen += bytes;
 
 		if (dctx->buflen == POLY1305_BLOCK_SIZE) {
-			if (likely(crypto_simd_usable())) {
+			if (static_branch_likely(&poly1305_use_simd) &&
+			    likely(crypto_simd_usable())) {
 				kernel_fpu_begin();
 				poly1305_simd_blocks(dctx, dctx->buf,
 						     POLY1305_BLOCK_SIZE);
@@ -131,7 +139,8 @@ static int poly1305_simd_update(struct shash_desc *desc,
 	}
 
 	if (likely(srclen >= POLY1305_BLOCK_SIZE)) {
-		if (likely(crypto_simd_usable())) {
+		if (static_branch_likely(&poly1305_use_simd) &&
+		    likely(crypto_simd_usable())) {
 			kernel_fpu_begin();
 			bytes = poly1305_simd_blocks(dctx, src, srclen);
 			kernel_fpu_end();
@@ -147,6 +156,13 @@ static int poly1305_simd_update(struct shash_desc *desc,
 		memcpy(dctx->buf, src, srclen);
 	}
 }
+EXPORT_SYMBOL(poly1305_update_arch);
+
+void poly1305_final_arch(struct poly1305_desc_ctx *desc, u8 *digest)
+{
+	poly1305_final_generic(desc, digest);
+}
+EXPORT_SYMBOL(poly1305_final_arch);
 
 static int crypto_poly1305_init(struct shash_desc *desc)
 {
@@ -171,6 +187,15 @@ static int crypto_poly1305_final(struct shash_desc *desc, u8 *dst)
 	return 0;
 }
 
+static int poly1305_simd_update(struct shash_desc *desc,
+				const u8 *src, unsigned int srclen)
+{
+	struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
+
+	poly1305_update_arch(dctx, src, srclen);
+	return 0;
+}
+
 static struct shash_alg alg = {
 	.digestsize	= POLY1305_DIGEST_SIZE,
 	.init		= crypto_poly1305_init,
@@ -189,15 +214,15 @@ static struct shash_alg alg = {
 static int __init poly1305_simd_mod_init(void)
 {
 	if (!boot_cpu_has(X86_FEATURE_XMM2))
-		return -ENODEV;
-
-	poly1305_use_avx2 = IS_ENABLED(CONFIG_AS_AVX2) &&
-			    boot_cpu_has(X86_FEATURE_AVX) &&
-			    boot_cpu_has(X86_FEATURE_AVX2) &&
-			    cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL);
-	alg.descsize = sizeof(struct poly1305_desc_ctx) + 5 * sizeof(u32);
-	if (poly1305_use_avx2)
-		alg.descsize += 10 * sizeof(u32);
+		return 0;
+
+	static_branch_enable(&poly1305_use_simd);
+
+	if (IS_ENABLED(CONFIG_AS_AVX2) &&
+	    boot_cpu_has(X86_FEATURE_AVX) &&
+	    boot_cpu_has(X86_FEATURE_AVX2) &&
+	    cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
+		static_branch_enable(&poly1305_use_avx2);
 
 	return crypto_register_shash(&alg);
 }
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 2c7327a5b28e..7aa4310713cf 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -715,6 +715,7 @@ config CRYPTO_POLY1305_X86_64
 	tristate "Poly1305 authenticator algorithm (x86_64/SSE2/AVX2)"
 	depends on X86 && 64BIT
 	select CRYPTO_LIB_POLY1305_GENERIC
+	select CRYPTO_ARCH_HAVE_LIB_POLY1305
 	help
 	  Poly1305 authenticator algorithm, RFC7539.
 
diff --git a/lib/crypto/Kconfig b/lib/crypto/Kconfig
index a731ea36bd5c..181754615f73 100644
--- a/lib/crypto/Kconfig
+++ b/lib/crypto/Kconfig
@@ -39,6 +39,7 @@ config CRYPTO_LIB_DES
 
 config CRYPTO_LIB_POLY1305_RSIZE
 	int
+	default 4 if X86_64
 	default 1
 
 config CRYPTO_ARCH_HAVE_LIB_POLY1305
-- 
2.20.1


  parent reply index

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-08 12:22 [PATCH v5 00/34] crypto: crypto API library interfaces for WireGuard Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 01/34] crypto: tidy up lib/crypto Kconfig and Makefile Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 02/34] crypto: chacha - move existing library code into lib/crypto Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 03/34] crypto: x86/chacha - depend on generic chacha library instead of crypto driver Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 04/34] crypto: x86/chacha - expose SIMD ChaCha routine as library function Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 05/34] crypto: arm64/chacha - depend on generic chacha library instead of crypto driver Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 06/34] crypto: arm64/chacha - expose arm64 ChaCha routine as library function Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 07/34] crypto: arm/chacha - import Eric Biggers's scalar accelerated ChaCha code Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 08/34] crypto: arm/chacha - remove dependency on generic ChaCha driver Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 09/34] crypto: arm/chacha - expose ARM ChaCha routine as library function Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 10/34] crypto: mips/chacha - import 32r2 ChaCha code from Zinc Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 11/34] crypto: mips/chacha - wire up accelerated 32r2 " Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 12/34] crypto: chacha - unexport chacha_generic routines Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 13/34] crypto: poly1305 - move core routines into a separate library Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 14/34] crypto: x86/poly1305 - unify Poly1305 state struct with generic code Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 15/34] crypto: poly1305 - expose init/update/final library interface Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 16/34] crypto: x86/poly1305 - depend on generic library not generic shash Ard Biesheuvel
2019-11-08 12:22 ` Ard Biesheuvel [this message]
2019-11-08 12:22 ` [PATCH v5 18/34] crypto: arm64/poly1305 - incorporate OpenSSL/CRYPTOGAMS NEON implementation Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 19/34] crypto: arm/poly1305 " Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 20/34] crypto: mips/poly1305 - incorporate OpenSSL/CRYPTOGAMS optimized implementation Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 21/34] int128: move __uint128_t compiler test to Kconfig Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 22/34] crypto: BLAKE2s - generic C library implementation and selftest Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 23/34] crypto: testmgr - add test cases for Blake2s Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 24/34] crypto: blake2s - implement generic shash driver Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 25/34] crypto: BLAKE2s - x86_64 SIMD implementation Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 26/34] crypto: Curve25519 - generic C library implementations Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 27/34] crypto: curve25519 - add kpp selftest Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 28/34] crypto: curve25519 - implement generic KPP driver Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 29/34] crypto: lib/curve25519 - work around Clang stack spilling issue Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 30/34] crypto: Curve25519 - x86_64 library and KPP implementations Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 31/34] crypto: arm - import Bernstein and Schwabe's Curve25519 ARM implementation Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 32/34] crypto: arm/Curve25519 - wire up NEON implementation Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 33/34] crypto: chacha20poly1305 - import construction and selftest from Zinc Ard Biesheuvel
2019-11-08 12:22 ` [PATCH v5 34/34] crypto: lib/chacha20poly1305 - reimplement crypt_from_sg() routine Ard Biesheuvel
2019-11-15  6:07 ` [PATCH v5 00/34] crypto: crypto API library interfaces for WireGuard Herbert Xu
     [not found]   ` <CAHmME9oOfhv6RN00m1c6c5qELC5dzFKS=mgDBQ-stVEWu00p_A@mail.gmail.com>
2019-11-15  9:09     ` Herbert Xu
2019-11-19 15:18       ` Jason A. Donenfeld
2019-11-19 15:34         ` Ard Biesheuvel
2019-11-19 15:44           ` Jason A. Donenfeld
2019-11-19 15:59             ` Ard Biesheuvel
2019-11-19 16:23             ` Eric Biggers
2019-11-19 21:43               ` Jordan Glover

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