diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/crypto/Kconfig | 11 | ||||
| -rw-r--r-- | arch/arm/crypto/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/crypto/crct10dif-ce-glue.c | 124 | ||||
| -rw-r--r-- | arch/arm/lib/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/lib/crc-t10dif-core.S (renamed from arch/arm/crypto/crct10dif-ce-core.S) | 0 | ||||
| -rw-r--r-- | arch/arm/lib/crc-t10dif-glue.c | 80 |
7 files changed, 84 insertions, 137 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index f817ca317b02..3ad4c3c97918 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -8,6 +8,7 @@ config ARM select ARCH_HAS_CPU_CACHE_ALIASING select ARCH_HAS_CPU_FINALIZE_INIT if MMU select ARCH_HAS_CRC32 if KERNEL_MODE_NEON + select ARCH_HAS_CRC_T10DIF if KERNEL_MODE_NEON select ARCH_HAS_CURRENT_STACK_POINTER select ARCH_HAS_DEBUG_VIRTUAL if MMU select ARCH_HAS_DMA_ALLOC if MMU diff --git a/arch/arm/crypto/Kconfig b/arch/arm/crypto/Kconfig index ea0ebf336d0d..32650c8431d9 100644 --- a/arch/arm/crypto/Kconfig +++ b/arch/arm/crypto/Kconfig @@ -222,16 +222,5 @@ config CRYPTO_CHACHA20_NEON Architecture: arm using: - NEON (Advanced SIMD) extensions -config CRYPTO_CRCT10DIF_ARM_CE - tristate "CRCT10DIF" - depends on KERNEL_MODE_NEON - depends on CRC_T10DIF - select CRYPTO_HASH - help - CRC16 CRC algorithm used for the T10 (SCSI) Data Integrity Field (DIF) - - Architecture: arm using: - - PMULL (Polynomial Multiply Long) instructions - endmenu diff --git a/arch/arm/crypto/Makefile b/arch/arm/crypto/Makefile index 38ec5cc1e844..3d0e23ff9e74 100644 --- a/arch/arm/crypto/Makefile +++ b/arch/arm/crypto/Makefile @@ -20,7 +20,6 @@ obj-$(CONFIG_CRYPTO_AES_ARM_CE) += aes-arm-ce.o obj-$(CONFIG_CRYPTO_SHA1_ARM_CE) += sha1-arm-ce.o obj-$(CONFIG_CRYPTO_SHA2_ARM_CE) += sha2-arm-ce.o obj-$(CONFIG_CRYPTO_GHASH_ARM_CE) += ghash-arm-ce.o -obj-$(CONFIG_CRYPTO_CRCT10DIF_ARM_CE) += crct10dif-arm-ce.o aes-arm-y := aes-cipher-core.o aes-cipher-glue.o aes-arm-bs-y := aes-neonbs-core.o aes-neonbs-glue.o @@ -36,7 +35,6 @@ sha1-arm-ce-y := sha1-ce-core.o sha1-ce-glue.o sha2-arm-ce-y := sha2-ce-core.o sha2-ce-glue.o aes-arm-ce-y := aes-ce-core.o aes-ce-glue.o ghash-arm-ce-y := ghash-ce-core.o ghash-ce-glue.o -crct10dif-arm-ce-y := crct10dif-ce-core.o crct10dif-ce-glue.o chacha-neon-y := chacha-scalar-core.o chacha-glue.o chacha-neon-$(CONFIG_KERNEL_MODE_NEON) += chacha-neon-core.o poly1305-arm-y := poly1305-core.o poly1305-glue.o diff --git a/arch/arm/crypto/crct10dif-ce-glue.c b/arch/arm/crypto/crct10dif-ce-glue.c deleted file mode 100644 index a8b74523729e..000000000000 --- a/arch/arm/crypto/crct10dif-ce-glue.c +++ /dev/null @@ -1,124 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Accelerated CRC-T10DIF using ARM NEON and Crypto Extensions instructions - * - * Copyright (C) 2016 Linaro Ltd <ard.biesheuvel@linaro.org> - */ - -#include <linux/crc-t10dif.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/string.h> - -#include <crypto/internal/hash.h> -#include <crypto/internal/simd.h> - -#include <asm/neon.h> -#include <asm/simd.h> - -#define CRC_T10DIF_PMULL_CHUNK_SIZE 16U - -asmlinkage u16 crc_t10dif_pmull64(u16 init_crc, const u8 *buf, size_t len); -asmlinkage void crc_t10dif_pmull8(u16 init_crc, const u8 *buf, size_t len, - u8 out[16]); - -static int crct10dif_init(struct shash_desc *desc) -{ - u16 *crc = shash_desc_ctx(desc); - - *crc = 0; - return 0; -} - -static int crct10dif_update_ce(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - u16 *crc = shash_desc_ctx(desc); - - if (length >= CRC_T10DIF_PMULL_CHUNK_SIZE && crypto_simd_usable()) { - kernel_neon_begin(); - *crc = crc_t10dif_pmull64(*crc, data, length); - kernel_neon_end(); - } else { - *crc = crc_t10dif_generic(*crc, data, length); - } - - return 0; -} - -static int crct10dif_update_neon(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - u16 *crcp = shash_desc_ctx(desc); - u8 buf[16] __aligned(16); - u16 crc = *crcp; - - if (length > CRC_T10DIF_PMULL_CHUNK_SIZE && crypto_simd_usable()) { - kernel_neon_begin(); - crc_t10dif_pmull8(crc, data, length, buf); - kernel_neon_end(); - - crc = 0; - data = buf; - length = sizeof(buf); - } - - *crcp = crc_t10dif_generic(crc, data, length); - return 0; -} - -static int crct10dif_final(struct shash_desc *desc, u8 *out) -{ - u16 *crc = shash_desc_ctx(desc); - - *(u16 *)out = *crc; - return 0; -} - -static struct shash_alg algs[] = {{ - .digestsize = CRC_T10DIF_DIGEST_SIZE, - .init = crct10dif_init, - .update = crct10dif_update_neon, - .final = crct10dif_final, - .descsize = CRC_T10DIF_DIGEST_SIZE, - - .base.cra_name = "crct10dif", - .base.cra_driver_name = "crct10dif-arm-neon", - .base.cra_priority = 150, - .base.cra_blocksize = CRC_T10DIF_BLOCK_SIZE, - .base.cra_module = THIS_MODULE, -}, { - .digestsize = CRC_T10DIF_DIGEST_SIZE, - .init = crct10dif_init, - .update = crct10dif_update_ce, - .final = crct10dif_final, - .descsize = CRC_T10DIF_DIGEST_SIZE, - - .base.cra_name = "crct10dif", - .base.cra_driver_name = "crct10dif-arm-ce", - .base.cra_priority = 200, - .base.cra_blocksize = CRC_T10DIF_BLOCK_SIZE, - .base.cra_module = THIS_MODULE, -}}; - -static int __init crc_t10dif_mod_init(void) -{ - if (!(elf_hwcap & HWCAP_NEON)) - return -ENODEV; - - return crypto_register_shashes(algs, 1 + !!(elf_hwcap2 & HWCAP2_PMULL)); -} - -static void __exit crc_t10dif_mod_exit(void) -{ - crypto_unregister_shashes(algs, 1 + !!(elf_hwcap2 & HWCAP2_PMULL)); -} - -module_init(crc_t10dif_mod_init); -module_exit(crc_t10dif_mod_exit); - -MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); -MODULE_DESCRIPTION("Accelerated CRC-T10DIF using ARM NEON and Crypto Extensions"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS_CRYPTO("crct10dif"); diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index 01cd4db2ed47..007874320937 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -48,3 +48,6 @@ obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o obj-$(CONFIG_CRC32_ARCH) += crc32-arm.o crc32-arm-y := crc32-glue.o crc32-core.o + +obj-$(CONFIG_CRC_T10DIF_ARCH) += crc-t10dif-arm.o +crc-t10dif-arm-y := crc-t10dif-glue.o crc-t10dif-core.o diff --git a/arch/arm/crypto/crct10dif-ce-core.S b/arch/arm/lib/crc-t10dif-core.S index 2bbf2df9c1e2..2bbf2df9c1e2 100644 --- a/arch/arm/crypto/crct10dif-ce-core.S +++ b/arch/arm/lib/crc-t10dif-core.S diff --git a/arch/arm/lib/crc-t10dif-glue.c b/arch/arm/lib/crc-t10dif-glue.c new file mode 100644 index 000000000000..d24dee62670e --- /dev/null +++ b/arch/arm/lib/crc-t10dif-glue.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Accelerated CRC-T10DIF using ARM NEON and Crypto Extensions instructions + * + * Copyright (C) 2016 Linaro Ltd <ard.biesheuvel@linaro.org> + */ + +#include <linux/crc-t10dif.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/string.h> + +#include <crypto/internal/simd.h> + +#include <asm/neon.h> +#include <asm/simd.h> + +static DEFINE_STATIC_KEY_FALSE(have_neon); +static DEFINE_STATIC_KEY_FALSE(have_pmull); + +#define CRC_T10DIF_PMULL_CHUNK_SIZE 16U + +asmlinkage u16 crc_t10dif_pmull64(u16 init_crc, const u8 *buf, size_t len); +asmlinkage void crc_t10dif_pmull8(u16 init_crc, const u8 *buf, size_t len, + u8 out[16]); + +u16 crc_t10dif_arch(u16 crc, const u8 *data, size_t length) +{ + if (length >= CRC_T10DIF_PMULL_CHUNK_SIZE) { + if (static_branch_likely(&have_pmull)) { + if (crypto_simd_usable()) { + kernel_neon_begin(); + crc = crc_t10dif_pmull64(crc, data, length); + kernel_neon_end(); + return crc; + } + } else if (length > CRC_T10DIF_PMULL_CHUNK_SIZE && + static_branch_likely(&have_neon) && + crypto_simd_usable()) { + u8 buf[16] __aligned(16); + + kernel_neon_begin(); + crc_t10dif_pmull8(crc, data, length, buf); + kernel_neon_end(); + + crc = 0; + data = buf; + length = sizeof(buf); + } + } + return crc_t10dif_generic(crc, data, length); +} +EXPORT_SYMBOL(crc_t10dif_arch); + +static int __init crc_t10dif_arm_init(void) +{ + if (elf_hwcap & HWCAP_NEON) { + static_branch_enable(&have_neon); + if (elf_hwcap2 & HWCAP2_PMULL) + static_branch_enable(&have_pmull); + } + return 0; +} +arch_initcall(crc_t10dif_arm_init); + +static void __exit crc_t10dif_arm_exit(void) +{ +} +module_exit(crc_t10dif_arm_exit); + +bool crc_t10dif_is_optimized(void) +{ + return static_key_enabled(&have_neon); +} +EXPORT_SYMBOL(crc_t10dif_is_optimized); + +MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); +MODULE_DESCRIPTION("Accelerated CRC-T10DIF using ARM NEON and Crypto Extensions"); +MODULE_LICENSE("GPL v2"); |