| Message ID | 20181129063422.24307-2-ebiggers@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | crypto: ARM64 NEON optimized XChaCha and NHPoly1305 (for Adiantum) | expand |
On Thu, 29 Nov 2018 at 07:35, Eric Biggers <ebiggers@kernel.org> wrote: > > From: Eric Biggers <ebiggers@google.com> > > Add an ARM64 NEON implementation of NHPoly1305, an ε-almost-∆-universal > hash function used in the Adiantum encryption mode. For now, only the > NH portion is actually NEON-accelerated; the Poly1305 part is less > performance-critical so is just implemented in C. > > Signed-off-by: Eric Biggers <ebiggers@google.com> > --- > arch/arm64/crypto/Kconfig | 5 ++ > arch/arm64/crypto/Makefile | 3 + > arch/arm64/crypto/nh-neon-core.S | 103 +++++++++++++++++++++++ > arch/arm64/crypto/nhpoly1305-neon-glue.c | 77 +++++++++++++++++ > 4 files changed, 188 insertions(+) > create mode 100644 arch/arm64/crypto/nh-neon-core.S > create mode 100644 arch/arm64/crypto/nhpoly1305-neon-glue.c > > diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig > index a5606823ed4da..3f5aeb786192b 100644 > --- a/arch/arm64/crypto/Kconfig > +++ b/arch/arm64/crypto/Kconfig > @@ -106,6 +106,11 @@ config CRYPTO_CHACHA20_NEON > select CRYPTO_BLKCIPHER > select CRYPTO_CHACHA20 > > +config CRYPTO_NHPOLY1305_NEON > + tristate "NHPoly1305 hash function using NEON instructions (for Adiantum)" > + depends on KERNEL_MODE_NEON > + select CRYPTO_NHPOLY1305 > + > config CRYPTO_AES_ARM64_BS > tristate "AES in ECB/CBC/CTR/XTS modes using bit-sliced NEON algorithm" > depends on KERNEL_MODE_NEON > diff --git a/arch/arm64/crypto/Makefile b/arch/arm64/crypto/Makefile > index f476fede09ba4..125dbb10a93ed 100644 > --- a/arch/arm64/crypto/Makefile > +++ b/arch/arm64/crypto/Makefile > @@ -53,6 +53,9 @@ sha512-arm64-y := sha512-glue.o sha512-core.o > obj-$(CONFIG_CRYPTO_CHACHA20_NEON) += chacha20-neon.o > chacha20-neon-y := chacha20-neon-core.o chacha20-neon-glue.o > > +obj-$(CONFIG_CRYPTO_NHPOLY1305_NEON) += nhpoly1305-neon.o > +nhpoly1305-neon-y := nh-neon-core.o nhpoly1305-neon-glue.o > + > obj-$(CONFIG_CRYPTO_AES_ARM64) += aes-arm64.o > aes-arm64-y := aes-cipher-core.o aes-cipher-glue.o > > diff --git a/arch/arm64/crypto/nh-neon-core.S b/arch/arm64/crypto/nh-neon-core.S > new file mode 100644 > index 0000000000000..e08d57676127a > --- /dev/null > +++ b/arch/arm64/crypto/nh-neon-core.S > @@ -0,0 +1,103 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * NH - ε-almost-universal hash function, ARM64 NEON accelerated version > + * > + * Copyright 2018 Google LLC > + * > + * Author: Eric Biggers <ebiggers@google.com> > + */ > + > +#include <linux/linkage.h> > + > + KEY .req x0 > + MESSAGE .req x1 > + MESSAGE_LEN .req x2 > + HASH .req x3 > + > + PASS0_SUMS .req v0 > + PASS1_SUMS .req v1 > + PASS2_SUMS .req v2 > + PASS3_SUMS .req v3 > + K0 .req v4 > + K1 .req v5 > + K2 .req v6 > + K3 .req v7 > + T0 .req v8 > + T1 .req v9 > + T2 .req v10 > + T3 .req v11 > + T4 .req v12 > + T5 .req v13 > + T6 .req v14 > + T7 .req v15 > + > +.macro _nh_stride k0, k1, k2, k3 > + > + // Load next message stride > + ld1 {T3.16b}, [MESSAGE], #16 > + > + // Load next key stride > + ld1 {\k3\().4s}, [KEY], #16 > + > + // Add message words to key words > + add T0.4s, T3.4s, \k0\().4s > + add T1.4s, T3.4s, \k1\().4s > + add T2.4s, T3.4s, \k2\().4s > + add T3.4s, T3.4s, \k3\().4s > + > + // Multiply 32x32 => 64 and accumulate > + mov T4.d[0], T0.d[1] > + mov T5.d[0], T1.d[1] > + mov T6.d[0], T2.d[1] > + mov T7.d[0], T3.d[1] Nit: gmail mangles the whitespace anyway, but in the patch, there is some whitespace damage here With that fixed, Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> # big-endian > + umlal PASS0_SUMS.2d, T0.2s, T4.2s > + umlal PASS1_SUMS.2d, T1.2s, T5.2s > + umlal PASS2_SUMS.2d, T2.2s, T6.2s > + umlal PASS3_SUMS.2d, T3.2s, T7.2s > +.endm > + > +/* > + * void nh_neon(const u32 *key, const u8 *message, size_t message_len, > + * u8 hash[NH_HASH_BYTES]) > + * > + * It's guaranteed that message_len % 16 == 0. > + */ > +ENTRY(nh_neon) > + > + ld1 {K0.4s,K1.4s}, [KEY], #32 > + movi PASS0_SUMS.2d, #0 > + movi PASS1_SUMS.2d, #0 > + ld1 {K2.4s}, [KEY], #16 > + movi PASS2_SUMS.2d, #0 > + movi PASS3_SUMS.2d, #0 > + > + subs MESSAGE_LEN, MESSAGE_LEN, #64 > + blt .Lloop4_done > +.Lloop4: > + _nh_stride K0, K1, K2, K3 > + _nh_stride K1, K2, K3, K0 > + _nh_stride K2, K3, K0, K1 > + _nh_stride K3, K0, K1, K2 > + subs MESSAGE_LEN, MESSAGE_LEN, #64 > + bge .Lloop4 > + > +.Lloop4_done: > + ands MESSAGE_LEN, MESSAGE_LEN, #63 > + beq .Ldone > + _nh_stride K0, K1, K2, K3 > + > + subs MESSAGE_LEN, MESSAGE_LEN, #16 > + beq .Ldone > + _nh_stride K1, K2, K3, K0 > + > + subs MESSAGE_LEN, MESSAGE_LEN, #16 > + beq .Ldone > + _nh_stride K2, K3, K0, K1 > + > +.Ldone: > + // Sum the accumulators for each pass, then store the sums to 'hash' > + addp T0.2d, PASS0_SUMS.2d, PASS1_SUMS.2d > + addp T1.2d, PASS2_SUMS.2d, PASS3_SUMS.2d > + st1 {T0.16b,T1.16b}, [HASH] > + ret > +ENDPROC(nh_neon) > diff --git a/arch/arm64/crypto/nhpoly1305-neon-glue.c b/arch/arm64/crypto/nhpoly1305-neon-glue.c > new file mode 100644 > index 0000000000000..22cc32ac9448d > --- /dev/null > +++ b/arch/arm64/crypto/nhpoly1305-neon-glue.c > @@ -0,0 +1,77 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * NHPoly1305 - ε-almost-∆-universal hash function for Adiantum > + * (ARM64 NEON accelerated version) > + * > + * Copyright 2018 Google LLC > + */ > + > +#include <asm/neon.h> > +#include <asm/simd.h> > +#include <crypto/internal/hash.h> > +#include <crypto/nhpoly1305.h> > +#include <linux/module.h> > + > +asmlinkage void nh_neon(const u32 *key, const u8 *message, size_t message_len, > + u8 hash[NH_HASH_BYTES]); > + > +/* wrapper to avoid indirect call to assembly, which doesn't work with CFI */ > +static void _nh_neon(const u32 *key, const u8 *message, size_t message_len, > + __le64 hash[NH_NUM_PASSES]) > +{ > + nh_neon(key, message, message_len, (u8 *)hash); > +} > + > +static int nhpoly1305_neon_update(struct shash_desc *desc, > + const u8 *src, unsigned int srclen) > +{ > + if (srclen < 64 || !may_use_simd()) > + return crypto_nhpoly1305_update(desc, src, srclen); > + > + do { > + unsigned int n = min_t(unsigned int, srclen, PAGE_SIZE); > + > + kernel_neon_begin(); > + crypto_nhpoly1305_update_helper(desc, src, n, _nh_neon); > + kernel_neon_end(); > + src += n; > + srclen -= n; > + } while (srclen); > + return 0; > +} > + > +static struct shash_alg nhpoly1305_alg = { > + .base.cra_name = "nhpoly1305", > + .base.cra_driver_name = "nhpoly1305-neon", > + .base.cra_priority = 200, > + .base.cra_ctxsize = sizeof(struct nhpoly1305_key), > + .base.cra_module = THIS_MODULE, > + .digestsize = POLY1305_DIGEST_SIZE, > + .init = crypto_nhpoly1305_init, > + .update = nhpoly1305_neon_update, > + .final = crypto_nhpoly1305_final, > + .setkey = crypto_nhpoly1305_setkey, > + .descsize = sizeof(struct nhpoly1305_state), > +}; > + > +static int __init nhpoly1305_mod_init(void) > +{ > + if (!(elf_hwcap & HWCAP_ASIMD)) > + return -ENODEV; > + > + return crypto_register_shash(&nhpoly1305_alg); > +} > + > +static void __exit nhpoly1305_mod_exit(void) > +{ > + crypto_unregister_shash(&nhpoly1305_alg); > +} > + > +module_init(nhpoly1305_mod_init); > +module_exit(nhpoly1305_mod_exit); > + > +MODULE_DESCRIPTION("NHPoly1305 ε-almost-∆-universal hash function (NEON-accelerated)"); > +MODULE_LICENSE("GPL v2"); > +MODULE_AUTHOR("Eric Biggers <ebiggers@google.com>"); > +MODULE_ALIAS_CRYPTO("nhpoly1305"); > +MODULE_ALIAS_CRYPTO("nhpoly1305-neon"); > -- > 2.19.2 >
diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig index a5606823ed4da..3f5aeb786192b 100644 --- a/arch/arm64/crypto/Kconfig +++ b/arch/arm64/crypto/Kconfig @@ -106,6 +106,11 @@ config CRYPTO_CHACHA20_NEON select CRYPTO_BLKCIPHER select CRYPTO_CHACHA20 +config CRYPTO_NHPOLY1305_NEON + tristate "NHPoly1305 hash function using NEON instructions (for Adiantum)" + depends on KERNEL_MODE_NEON + select CRYPTO_NHPOLY1305 + config CRYPTO_AES_ARM64_BS tristate "AES in ECB/CBC/CTR/XTS modes using bit-sliced NEON algorithm" depends on KERNEL_MODE_NEON diff --git a/arch/arm64/crypto/Makefile b/arch/arm64/crypto/Makefile index f476fede09ba4..125dbb10a93ed 100644 --- a/arch/arm64/crypto/Makefile +++ b/arch/arm64/crypto/Makefile @@ -53,6 +53,9 @@ sha512-arm64-y := sha512-glue.o sha512-core.o obj-$(CONFIG_CRYPTO_CHACHA20_NEON) += chacha20-neon.o chacha20-neon-y := chacha20-neon-core.o chacha20-neon-glue.o +obj-$(CONFIG_CRYPTO_NHPOLY1305_NEON) += nhpoly1305-neon.o +nhpoly1305-neon-y := nh-neon-core.o nhpoly1305-neon-glue.o + obj-$(CONFIG_CRYPTO_AES_ARM64) += aes-arm64.o aes-arm64-y := aes-cipher-core.o aes-cipher-glue.o diff --git a/arch/arm64/crypto/nh-neon-core.S b/arch/arm64/crypto/nh-neon-core.S new file mode 100644 index 0000000000000..e08d57676127a --- /dev/null +++ b/arch/arm64/crypto/nh-neon-core.S @@ -0,0 +1,103 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * NH - ε-almost-universal hash function, ARM64 NEON accelerated version + * + * Copyright 2018 Google LLC + * + * Author: Eric Biggers <ebiggers@google.com> + */ + +#include <linux/linkage.h> + + KEY .req x0 + MESSAGE .req x1 + MESSAGE_LEN .req x2 + HASH .req x3 + + PASS0_SUMS .req v0 + PASS1_SUMS .req v1 + PASS2_SUMS .req v2 + PASS3_SUMS .req v3 + K0 .req v4 + K1 .req v5 + K2 .req v6 + K3 .req v7 + T0 .req v8 + T1 .req v9 + T2 .req v10 + T3 .req v11 + T4 .req v12 + T5 .req v13 + T6 .req v14 + T7 .req v15 + +.macro _nh_stride k0, k1, k2, k3 + + // Load next message stride + ld1 {T3.16b}, [MESSAGE], #16 + + // Load next key stride + ld1 {\k3\().4s}, [KEY], #16 + + // Add message words to key words + add T0.4s, T3.4s, \k0\().4s + add T1.4s, T3.4s, \k1\().4s + add T2.4s, T3.4s, \k2\().4s + add T3.4s, T3.4s, \k3\().4s + + // Multiply 32x32 => 64 and accumulate + mov T4.d[0], T0.d[1] + mov T5.d[0], T1.d[1] + mov T6.d[0], T2.d[1] + mov T7.d[0], T3.d[1] + umlal PASS0_SUMS.2d, T0.2s, T4.2s + umlal PASS1_SUMS.2d, T1.2s, T5.2s + umlal PASS2_SUMS.2d, T2.2s, T6.2s + umlal PASS3_SUMS.2d, T3.2s, T7.2s +.endm + +/* + * void nh_neon(const u32 *key, const u8 *message, size_t message_len, + * u8 hash[NH_HASH_BYTES]) + * + * It's guaranteed that message_len % 16 == 0. + */ +ENTRY(nh_neon) + + ld1 {K0.4s,K1.4s}, [KEY], #32 + movi PASS0_SUMS.2d, #0 + movi PASS1_SUMS.2d, #0 + ld1 {K2.4s}, [KEY], #16 + movi PASS2_SUMS.2d, #0 + movi PASS3_SUMS.2d, #0 + + subs MESSAGE_LEN, MESSAGE_LEN, #64 + blt .Lloop4_done +.Lloop4: + _nh_stride K0, K1, K2, K3 + _nh_stride K1, K2, K3, K0 + _nh_stride K2, K3, K0, K1 + _nh_stride K3, K0, K1, K2 + subs MESSAGE_LEN, MESSAGE_LEN, #64 + bge .Lloop4 + +.Lloop4_done: + ands MESSAGE_LEN, MESSAGE_LEN, #63 + beq .Ldone + _nh_stride K0, K1, K2, K3 + + subs MESSAGE_LEN, MESSAGE_LEN, #16 + beq .Ldone + _nh_stride K1, K2, K3, K0 + + subs MESSAGE_LEN, MESSAGE_LEN, #16 + beq .Ldone + _nh_stride K2, K3, K0, K1 + +.Ldone: + // Sum the accumulators for each pass, then store the sums to 'hash' + addp T0.2d, PASS0_SUMS.2d, PASS1_SUMS.2d + addp T1.2d, PASS2_SUMS.2d, PASS3_SUMS.2d + st1 {T0.16b,T1.16b}, [HASH] + ret +ENDPROC(nh_neon) diff --git a/arch/arm64/crypto/nhpoly1305-neon-glue.c b/arch/arm64/crypto/nhpoly1305-neon-glue.c new file mode 100644 index 0000000000000..22cc32ac9448d --- /dev/null +++ b/arch/arm64/crypto/nhpoly1305-neon-glue.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * NHPoly1305 - ε-almost-∆-universal hash function for Adiantum + * (ARM64 NEON accelerated version) + * + * Copyright 2018 Google LLC + */ + +#include <asm/neon.h> +#include <asm/simd.h> +#include <crypto/internal/hash.h> +#include <crypto/nhpoly1305.h> +#include <linux/module.h> + +asmlinkage void nh_neon(const u32 *key, const u8 *message, size_t message_len, + u8 hash[NH_HASH_BYTES]); + +/* wrapper to avoid indirect call to assembly, which doesn't work with CFI */ +static void _nh_neon(const u32 *key, const u8 *message, size_t message_len, + __le64 hash[NH_NUM_PASSES]) +{ + nh_neon(key, message, message_len, (u8 *)hash); +} + +static int nhpoly1305_neon_update(struct shash_desc *desc, + const u8 *src, unsigned int srclen) +{ + if (srclen < 64 || !may_use_simd()) + return crypto_nhpoly1305_update(desc, src, srclen); + + do { + unsigned int n = min_t(unsigned int, srclen, PAGE_SIZE); + + kernel_neon_begin(); + crypto_nhpoly1305_update_helper(desc, src, n, _nh_neon); + kernel_neon_end(); + src += n; + srclen -= n; + } while (srclen); + return 0; +} + +static struct shash_alg nhpoly1305_alg = { + .base.cra_name = "nhpoly1305", + .base.cra_driver_name = "nhpoly1305-neon", + .base.cra_priority = 200, + .base.cra_ctxsize = sizeof(struct nhpoly1305_key), + .base.cra_module = THIS_MODULE, + .digestsize = POLY1305_DIGEST_SIZE, + .init = crypto_nhpoly1305_init, + .update = nhpoly1305_neon_update, + .final = crypto_nhpoly1305_final, + .setkey = crypto_nhpoly1305_setkey, + .descsize = sizeof(struct nhpoly1305_state), +}; + +static int __init nhpoly1305_mod_init(void) +{ + if (!(elf_hwcap & HWCAP_ASIMD)) + return -ENODEV; + + return crypto_register_shash(&nhpoly1305_alg); +} + +static void __exit nhpoly1305_mod_exit(void) +{ + crypto_unregister_shash(&nhpoly1305_alg); +} + +module_init(nhpoly1305_mod_init); +module_exit(nhpoly1305_mod_exit); + +MODULE_DESCRIPTION("NHPoly1305 ε-almost-∆-universal hash function (NEON-accelerated)"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Eric Biggers <ebiggers@google.com>"); +MODULE_ALIAS_CRYPTO("nhpoly1305"); +MODULE_ALIAS_CRYPTO("nhpoly1305-neon");