diff options
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/configs/milbeaut_m10v_defconfig | 1 | ||||
| -rw-r--r-- | arch/arm/configs/multi_v7_defconfig | 1 | ||||
| -rw-r--r-- | arch/arm/crypto/Kconfig | 14 | ||||
| -rw-r--r-- | arch/arm/crypto/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/crypto/crc32-ce-glue.c | 247 | ||||
| -rw-r--r-- | arch/arm/lib/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/lib/crc32-core.S (renamed from arch/arm/crypto/crc32-ce-core.S) | 5 | ||||
| -rw-r--r-- | arch/arm/lib/crc32-glue.c | 123 |
9 files changed, 129 insertions, 268 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 202397be76d8..f817ca317b02 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -7,6 +7,7 @@ config ARM select ARCH_HAS_BINFMT_FLAT 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_CURRENT_STACK_POINTER select ARCH_HAS_DEBUG_VIRTUAL if MMU select ARCH_HAS_DMA_ALLOC if MMU diff --git a/arch/arm/configs/milbeaut_m10v_defconfig b/arch/arm/configs/milbeaut_m10v_defconfig index f5eeac9c65c3..acd16204f8d7 100644 --- a/arch/arm/configs/milbeaut_m10v_defconfig +++ b/arch/arm/configs/milbeaut_m10v_defconfig @@ -107,7 +107,6 @@ CONFIG_CRYPTO_AES_ARM=m CONFIG_CRYPTO_AES_ARM_BS=m CONFIG_CRYPTO_AES_ARM_CE=m CONFIG_CRYPTO_CHACHA20_NEON=m -CONFIG_CRYPTO_CRC32_ARM_CE=m # CONFIG_CRYPTO_HW is not set CONFIG_CRC_CCITT=m CONFIG_CRC_ITU_T=m diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig index 758276027dbc..9d4336261e45 100644 --- a/arch/arm/configs/multi_v7_defconfig +++ b/arch/arm/configs/multi_v7_defconfig @@ -1306,7 +1306,6 @@ CONFIG_CRYPTO_AES_ARM=m CONFIG_CRYPTO_AES_ARM_BS=m CONFIG_CRYPTO_AES_ARM_CE=m CONFIG_CRYPTO_CHACHA20_NEON=m -CONFIG_CRYPTO_CRC32_ARM_CE=m CONFIG_CRYPTO_DEV_SUN4I_SS=m CONFIG_CRYPTO_DEV_FSL_CAAM=m CONFIG_CRYPTO_DEV_EXYNOS_RNG=m diff --git a/arch/arm/crypto/Kconfig b/arch/arm/crypto/Kconfig index 5ff49a5e9afc..ea0ebf336d0d 100644 --- a/arch/arm/crypto/Kconfig +++ b/arch/arm/crypto/Kconfig @@ -222,20 +222,6 @@ config CRYPTO_CHACHA20_NEON Architecture: arm using: - NEON (Advanced SIMD) extensions -config CRYPTO_CRC32_ARM_CE - tristate "CRC32C and CRC32" - depends on KERNEL_MODE_NEON - depends on CRC32 - select CRYPTO_HASH - help - CRC32c CRC algorithm with the iSCSI polynomial (RFC 3385 and RFC 3720) - and CRC32 CRC algorithm (IEEE 802.3) - - Architecture: arm using: - - CRC and/or PMULL instructions - - Drivers: crc32-arm-ce and crc32c-arm-ce - config CRYPTO_CRCT10DIF_ARM_CE tristate "CRCT10DIF" depends on KERNEL_MODE_NEON diff --git a/arch/arm/crypto/Makefile b/arch/arm/crypto/Makefile index 13e62c7c25dc..38ec5cc1e844 100644 --- a/arch/arm/crypto/Makefile +++ b/arch/arm/crypto/Makefile @@ -21,7 +21,6 @@ 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 -obj-$(CONFIG_CRYPTO_CRC32_ARM_CE) += crc32-arm-ce.o aes-arm-y := aes-cipher-core.o aes-cipher-glue.o aes-arm-bs-y := aes-neonbs-core.o aes-neonbs-glue.o @@ -38,7 +37,6 @@ sha2-arm-ce-y := sha2-ce-core.o sha2-ce-glue.o aes-arm-ce-y := aes-ce-core.o aes-ce-glue.o ghash-arm-ce-y := ghash-ce-core.o ghash-ce-glue.o crct10dif-arm-ce-y := crct10dif-ce-core.o crct10dif-ce-glue.o -crc32-arm-ce-y:= crc32-ce-core.o crc32-ce-glue.o chacha-neon-y := chacha-scalar-core.o chacha-glue.o chacha-neon-$(CONFIG_KERNEL_MODE_NEON) += chacha-neon-core.o poly1305-arm-y := poly1305-core.o poly1305-glue.o diff --git a/arch/arm/crypto/crc32-ce-glue.c b/arch/arm/crypto/crc32-ce-glue.c deleted file mode 100644 index 20b4dff13e3a..000000000000 --- a/arch/arm/crypto/crc32-ce-glue.c +++ /dev/null @@ -1,247 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Accelerated CRC32(C) using ARM CRC, NEON and Crypto Extensions instructions - * - * Copyright (C) 2016 Linaro Ltd <ard.biesheuvel@linaro.org> - */ - -#include <linux/cpufeature.h> -#include <linux/crc32.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/hwcap.h> -#include <asm/neon.h> -#include <asm/simd.h> -#include <linux/unaligned.h> - -#define PMULL_MIN_LEN 64L /* minimum size of buffer - * for crc32_pmull_le_16 */ -#define SCALE_F 16L /* size of NEON register */ - -asmlinkage u32 crc32_pmull_le(const u8 buf[], u32 len, u32 init_crc); -asmlinkage u32 crc32_armv8_le(u32 init_crc, const u8 buf[], u32 len); - -asmlinkage u32 crc32c_pmull_le(const u8 buf[], u32 len, u32 init_crc); -asmlinkage u32 crc32c_armv8_le(u32 init_crc, const u8 buf[], u32 len); - -static u32 (*fallback_crc32)(u32 init_crc, const u8 buf[], u32 len); -static u32 (*fallback_crc32c)(u32 init_crc, const u8 buf[], u32 len); - -static int crc32_cra_init(struct crypto_tfm *tfm) -{ - u32 *key = crypto_tfm_ctx(tfm); - - *key = 0; - return 0; -} - -static int crc32c_cra_init(struct crypto_tfm *tfm) -{ - u32 *key = crypto_tfm_ctx(tfm); - - *key = ~0; - return 0; -} - -static int crc32_setkey(struct crypto_shash *hash, const u8 *key, - unsigned int keylen) -{ - u32 *mctx = crypto_shash_ctx(hash); - - if (keylen != sizeof(u32)) - return -EINVAL; - *mctx = le32_to_cpup((__le32 *)key); - return 0; -} - -static int crc32_init(struct shash_desc *desc) -{ - u32 *mctx = crypto_shash_ctx(desc->tfm); - u32 *crc = shash_desc_ctx(desc); - - *crc = *mctx; - return 0; -} - -static int crc32_update(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - u32 *crc = shash_desc_ctx(desc); - - *crc = crc32_armv8_le(*crc, data, length); - return 0; -} - -static int crc32c_update(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - u32 *crc = shash_desc_ctx(desc); - - *crc = crc32c_armv8_le(*crc, data, length); - return 0; -} - -static int crc32_final(struct shash_desc *desc, u8 *out) -{ - u32 *crc = shash_desc_ctx(desc); - - put_unaligned_le32(*crc, out); - return 0; -} - -static int crc32c_final(struct shash_desc *desc, u8 *out) -{ - u32 *crc = shash_desc_ctx(desc); - - put_unaligned_le32(~*crc, out); - return 0; -} - -static int crc32_pmull_update(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - u32 *crc = shash_desc_ctx(desc); - unsigned int l; - - if (crypto_simd_usable()) { - if ((u32)data % SCALE_F) { - l = min_t(u32, length, SCALE_F - ((u32)data % SCALE_F)); - - *crc = fallback_crc32(*crc, data, l); - - data += l; - length -= l; - } - - if (length >= PMULL_MIN_LEN) { - l = round_down(length, SCALE_F); - - kernel_neon_begin(); - *crc = crc32_pmull_le(data, l, *crc); - kernel_neon_end(); - - data += l; - length -= l; - } - } - - if (length > 0) - *crc = fallback_crc32(*crc, data, length); - - return 0; -} - -static int crc32c_pmull_update(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - u32 *crc = shash_desc_ctx(desc); - unsigned int l; - - if (crypto_simd_usable()) { - if ((u32)data % SCALE_F) { - l = min_t(u32, length, SCALE_F - ((u32)data % SCALE_F)); - - *crc = fallback_crc32c(*crc, data, l); - - data += l; - length -= l; - } - - if (length >= PMULL_MIN_LEN) { - l = round_down(length, SCALE_F); - - kernel_neon_begin(); - *crc = crc32c_pmull_le(data, l, *crc); - kernel_neon_end(); - - data += l; - length -= l; - } - } - - if (length > 0) - *crc = fallback_crc32c(*crc, data, length); - - return 0; -} - -static struct shash_alg crc32_pmull_algs[] = { { - .setkey = crc32_setkey, - .init = crc32_init, - .update = crc32_update, - .final = crc32_final, - .descsize = sizeof(u32), - .digestsize = sizeof(u32), - - .base.cra_ctxsize = sizeof(u32), - .base.cra_init = crc32_cra_init, - .base.cra_name = "crc32", - .base.cra_driver_name = "crc32-arm-ce", - .base.cra_priority = 200, - .base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY, - .base.cra_blocksize = 1, - .base.cra_module = THIS_MODULE, -}, { - .setkey = crc32_setkey, - .init = crc32_init, - .update = crc32c_update, - .final = crc32c_final, - .descsize = sizeof(u32), - .digestsize = sizeof(u32), - - .base.cra_ctxsize = sizeof(u32), - .base.cra_init = crc32c_cra_init, - .base.cra_name = "crc32c", - .base.cra_driver_name = "crc32c-arm-ce", - .base.cra_priority = 200, - .base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY, - .base.cra_blocksize = 1, - .base.cra_module = THIS_MODULE, -} }; - -static int __init crc32_pmull_mod_init(void) -{ - if (elf_hwcap2 & HWCAP2_PMULL) { - crc32_pmull_algs[0].update = crc32_pmull_update; - crc32_pmull_algs[1].update = crc32c_pmull_update; - - if (elf_hwcap2 & HWCAP2_CRC32) { - fallback_crc32 = crc32_armv8_le; - fallback_crc32c = crc32c_armv8_le; - } else { - fallback_crc32 = crc32_le; - fallback_crc32c = __crc32c_le; - } - } else if (!(elf_hwcap2 & HWCAP2_CRC32)) { - return -ENODEV; - } - - return crypto_register_shashes(crc32_pmull_algs, - ARRAY_SIZE(crc32_pmull_algs)); -} - -static void __exit crc32_pmull_mod_exit(void) -{ - crypto_unregister_shashes(crc32_pmull_algs, - ARRAY_SIZE(crc32_pmull_algs)); -} - -static const struct cpu_feature __maybe_unused crc32_cpu_feature[] = { - { cpu_feature(CRC32) }, { cpu_feature(PMULL) }, { } -}; -MODULE_DEVICE_TABLE(cpu, crc32_cpu_feature); - -module_init(crc32_pmull_mod_init); -module_exit(crc32_pmull_mod_exit); - -MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); -MODULE_DESCRIPTION("Accelerated CRC32(C) using ARM CRC, NEON and Crypto Extensions"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS_CRYPTO("crc32"); -MODULE_ALIAS_CRYPTO("crc32c"); diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index 0ca5aae1bcc3..01cd4db2ed47 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -45,3 +45,6 @@ ifeq ($(CONFIG_KERNEL_MODE_NEON),y) endif obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o + +obj-$(CONFIG_CRC32_ARCH) += crc32-arm.o +crc32-arm-y := crc32-glue.o crc32-core.o diff --git a/arch/arm/crypto/crc32-ce-core.S b/arch/arm/lib/crc32-core.S index 88f9edf94e95..6f674f30c70b 100644 --- a/arch/arm/crypto/crc32-ce-core.S +++ b/arch/arm/lib/crc32-core.S @@ -48,7 +48,6 @@ */ #include <linux/linkage.h> -#include <linux/cfi_types.h> #include <asm/assembler.h> .text @@ -297,11 +296,11 @@ ARM_BE8(rev16 r3, r3 ) .endm .align 5 -SYM_TYPED_FUNC_START(crc32_armv8_le) +SYM_FUNC_START(crc32_armv8_le) __crc32 SYM_FUNC_END(crc32_armv8_le) .align 5 -SYM_TYPED_FUNC_START(crc32c_armv8_le) +SYM_FUNC_START(crc32c_armv8_le) __crc32 c SYM_FUNC_END(crc32c_armv8_le) diff --git a/arch/arm/lib/crc32-glue.c b/arch/arm/lib/crc32-glue.c new file mode 100644 index 000000000000..2c30ba3d80e6 --- /dev/null +++ b/arch/arm/lib/crc32-glue.c @@ -0,0 +1,123 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Accelerated CRC32(C) using ARM CRC, NEON and Crypto Extensions instructions + * + * Copyright (C) 2016 Linaro Ltd <ard.biesheuvel@linaro.org> + */ + +#include <linux/cpufeature.h> +#include <linux/crc32.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/string.h> + +#include <crypto/internal/simd.h> + +#include <asm/hwcap.h> +#include <asm/neon.h> +#include <asm/simd.h> + +static DEFINE_STATIC_KEY_FALSE(have_crc32); +static DEFINE_STATIC_KEY_FALSE(have_pmull); + +#define PMULL_MIN_LEN 64 /* min size of buffer for pmull functions */ + +asmlinkage u32 crc32_pmull_le(const u8 buf[], u32 len, u32 init_crc); +asmlinkage u32 crc32_armv8_le(u32 init_crc, const u8 buf[], u32 len); + +asmlinkage u32 crc32c_pmull_le(const u8 buf[], u32 len, u32 init_crc); +asmlinkage u32 crc32c_armv8_le(u32 init_crc, const u8 buf[], u32 len); + +static u32 crc32_le_scalar(u32 crc, const u8 *p, size_t len) +{ + if (static_branch_likely(&have_crc32)) + return crc32_armv8_le(crc, p, len); + return crc32_le_base(crc, p, len); +} + +u32 crc32_le_arch(u32 crc, const u8 *p, size_t len) +{ + if (len >= PMULL_MIN_LEN + 15 && + static_branch_likely(&have_pmull) && crypto_simd_usable()) { + size_t n = -(uintptr_t)p & 15; + + /* align p to 16-byte boundary */ + if (n) { + crc = crc32_le_scalar(crc, p, n); + p += n; + len -= n; + } + n = round_down(len, 16); + kernel_neon_begin(); + crc = crc32_pmull_le(p, n, crc); + kernel_neon_end(); + p += n; + len -= n; + } + return crc32_le_scalar(crc, p, len); +} +EXPORT_SYMBOL(crc32_le_arch); + +static u32 crc32c_le_scalar(u32 crc, const u8 *p, size_t len) +{ + if (static_branch_likely(&have_crc32)) + return crc32c_armv8_le(crc, p, len); + return crc32c_le_base(crc, p, len); +} + +u32 crc32c_le_arch(u32 crc, const u8 *p, size_t len) +{ + if (len >= PMULL_MIN_LEN + 15 && + static_branch_likely(&have_pmull) && crypto_simd_usable()) { + size_t n = -(uintptr_t)p & 15; + + /* align p to 16-byte boundary */ + if (n) { + crc = crc32c_le_scalar(crc, p, n); + p += n; + len -= n; + } + n = round_down(len, 16); + kernel_neon_begin(); + crc = crc32c_pmull_le(p, n, crc); + kernel_neon_end(); + p += n; + len -= n; + } + return crc32c_le_scalar(crc, p, len); +} +EXPORT_SYMBOL(crc32c_le_arch); + +u32 crc32_be_arch(u32 crc, const u8 *p, size_t len) +{ + return crc32_be_base(crc, p, len); +} +EXPORT_SYMBOL(crc32_be_arch); + +static int __init crc32_arm_init(void) +{ + if (elf_hwcap2 & HWCAP2_CRC32) + static_branch_enable(&have_crc32); + if (elf_hwcap2 & HWCAP2_PMULL) + static_branch_enable(&have_pmull); + return 0; +} +arch_initcall(crc32_arm_init); + +static void __exit crc32_arm_exit(void) +{ +} +module_exit(crc32_arm_exit); + +u32 crc32_optimizations(void) +{ + if (elf_hwcap2 & (HWCAP2_CRC32 | HWCAP2_PMULL)) + return CRC32_LE_OPTIMIZATION | CRC32C_OPTIMIZATION; + return 0; +} +EXPORT_SYMBOL(crc32_optimizations); + +MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); +MODULE_DESCRIPTION("Accelerated CRC32(C) using ARM CRC, NEON and Crypto Extensions"); +MODULE_LICENSE("GPL v2"); |