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a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729470596; c=relaxed/simple; bh=rHVPCVk2HcUuwbwJdIJiYtVAk/DIw6qPFcDDLFcj+/s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TPRp+IuV+YQNzDRLuiWyPC7LO1F8z6c2qmmqXW0jN8piEa5e/TXYCUHGj2x/cClrAJzzJoVakfMNh1hklTR05NPWhru7oDLGDYsg5ucelgL8l7wsLSsR0dIss78wvWQvsImUN+4Iix/+60bP7T4ht4fZd0kr3k3rXxtKaXi/n14= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oimnqgwb; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id C2F51C4AF52; Mon, 21 Oct 2024 00:29:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729470595; bh=rHVPCVk2HcUuwbwJdIJiYtVAk/DIw6qPFcDDLFcj+/s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oimnqgwblTl4P7ykphakIn/6ohauWWoNYpiucv9VSHcP0rxQt12ClLANt9RUZgGBo ulCKpFBa0z+FKjaRCSOXh8a+aT/TqjBgKHn+2oSmKkLLTtzFV00fbjWic8J9HWHpCn Hc7lOAEAsQn4BT4Lnp7X3PmY722dqJAbqNvRL6cWPHWlpWxpJ/L3XD9Tt7x+q7xX6x PbvKTmcU3kG6rd9F+gdF7duMpk//vuhib47IxODYjKSQFWiC6C62x5GEZ0robLZxGQ 0QCNJvjmTGKo66OG3GQkrQeM6d86VWl4TLI7m9sMEv0sBxCZoLZSelcpwoIYbtotpm VEJTU43g2h2FA== From: Eric Biggers To: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH 08/15] sparc/crc32: expose CRC32 functions through lib Date: Sun, 20 Oct 2024 17:29:28 -0700 Message-ID: <20241021002935.325878-9-ebiggers@kernel.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241021002935.325878-1-ebiggers@kernel.org> References: <20241021002935.325878-1-ebiggers@kernel.org> Precedence: bulk X-Mailing-List: sparclinux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Eric Biggers Move the sparc CRC32C assembly code into the lib directory and wire it up to the library interface. This allows it to be used without going through the crypto API. It remains usable via the crypto API too via the shash algorithms that use the library interface. Thus all the arch-specific "shash" code becomes unnecessary and is removed. Note: to see the diff from arch/sparc/crypto/crc32c_glue.c to arch/sparc/lib/crc32_glue.c, view this commit with 'git show -M10'. Signed-off-by: Eric Biggers --- arch/sparc/Kconfig | 1 + arch/sparc/crypto/Kconfig | 10 -- arch/sparc/crypto/Makefile | 4 - arch/sparc/crypto/crc32c_glue.c | 184 ------------------------ arch/sparc/lib/Makefile | 2 + arch/sparc/lib/crc32_glue.c | 85 +++++++++++ arch/sparc/{crypto => lib}/crc32c_asm.S | 2 +- 7 files changed, 89 insertions(+), 199 deletions(-) delete mode 100644 arch/sparc/crypto/crc32c_glue.c create mode 100644 arch/sparc/lib/crc32_glue.c rename arch/sparc/{crypto => lib}/crc32c_asm.S (92%) diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index dcfdb7f1dae97..0f88123925a4f 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -108,10 +108,11 @@ config SPARC64 select ARCH_HAS_GIGANTIC_PAGE select HAVE_SOFTIRQ_ON_OWN_STACK select HAVE_SETUP_PER_CPU_AREA select NEED_PER_CPU_EMBED_FIRST_CHUNK select NEED_PER_CPU_PAGE_FIRST_CHUNK + select ARCH_HAS_CRC32 config ARCH_PROC_KCORE_TEXT def_bool y config CPU_BIG_ENDIAN diff --git a/arch/sparc/crypto/Kconfig b/arch/sparc/crypto/Kconfig index cfe5102b1c683..e858597de89db 100644 --- a/arch/sparc/crypto/Kconfig +++ b/arch/sparc/crypto/Kconfig @@ -14,20 +14,10 @@ config CRYPTO_DES_SPARC64 Length-preserving ciphers: DES with ECB and CBC modes Length-preserving ciphers: Tripe DES EDE with ECB and CBC modes Architecture: sparc64 -config CRYPTO_CRC32C_SPARC64 - tristate "CRC32c" - depends on SPARC64 - select CRYPTO_HASH - select CRC32 - help - CRC32c CRC algorithm with the iSCSI polynomial (RFC 3385 and RFC 3720) - - Architecture: sparc64 - config CRYPTO_MD5_SPARC64 tristate "Digests: MD5" depends on SPARC64 select CRYPTO_MD5 select CRYPTO_HASH diff --git a/arch/sparc/crypto/Makefile b/arch/sparc/crypto/Makefile index d257186c27d12..a2d7fca40cb4b 100644 --- a/arch/sparc/crypto/Makefile +++ b/arch/sparc/crypto/Makefile @@ -10,17 +10,13 @@ obj-$(CONFIG_CRYPTO_MD5_SPARC64) += md5-sparc64.o obj-$(CONFIG_CRYPTO_AES_SPARC64) += aes-sparc64.o obj-$(CONFIG_CRYPTO_DES_SPARC64) += des-sparc64.o obj-$(CONFIG_CRYPTO_CAMELLIA_SPARC64) += camellia-sparc64.o -obj-$(CONFIG_CRYPTO_CRC32C_SPARC64) += crc32c-sparc64.o - sha1-sparc64-y := sha1_asm.o sha1_glue.o sha256-sparc64-y := sha256_asm.o sha256_glue.o sha512-sparc64-y := sha512_asm.o sha512_glue.o md5-sparc64-y := md5_asm.o md5_glue.o aes-sparc64-y := aes_asm.o aes_glue.o des-sparc64-y := des_asm.o des_glue.o camellia-sparc64-y := camellia_asm.o camellia_glue.o - -crc32c-sparc64-y := crc32c_asm.o crc32c_glue.o diff --git a/arch/sparc/crypto/crc32c_glue.c b/arch/sparc/crypto/crc32c_glue.c deleted file mode 100644 index 913b9a09e885d..0000000000000 --- a/arch/sparc/crypto/crc32c_glue.c +++ /dev/null @@ -1,184 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* Glue code for CRC32C optimized for sparc64 crypto opcodes. - * - * This is based largely upon arch/x86/crypto/crc32c-intel.c - * - * Copyright (C) 2008 Intel Corporation - * Authors: Austin Zhang - * Kent Liu - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include -#include -#include -#include -#include - -#include - -#include -#include -#include - -#include "opcodes.h" - -/* - * Setting the seed allows arbitrary accumulators and flexible XOR policy - * If your algorithm starts with ~0, then XOR with ~0 before you set - * the seed. - */ -static int crc32c_sparc64_setkey(struct crypto_shash *hash, const u8 *key, - unsigned int keylen) -{ - u32 *mctx = crypto_shash_ctx(hash); - - if (keylen != sizeof(u32)) - return -EINVAL; - *mctx = get_unaligned_le32(key); - return 0; -} - -static int crc32c_sparc64_init(struct shash_desc *desc) -{ - u32 *mctx = crypto_shash_ctx(desc->tfm); - u32 *crcp = shash_desc_ctx(desc); - - *crcp = *mctx; - - return 0; -} - -extern void crc32c_sparc64(u32 *crcp, const u64 *data, unsigned int len); - -static u32 crc32c_compute(u32 crc, const u8 *data, unsigned int len) -{ - unsigned int n = -(uintptr_t)data & 7; - - if (n) { - /* Data isn't 8-byte aligned. Align it. */ - n = min(n, len); - crc = __crc32c_le(crc, data, n); - data += n; - len -= n; - } - n = len & ~7U; - if (n) { - crc32c_sparc64(&crc, (const u64 *)data, n); - data += n; - len -= n; - } - if (len) - crc = __crc32c_le(crc, data, len); - return crc; -} - -static int crc32c_sparc64_update(struct shash_desc *desc, const u8 *data, - unsigned int len) -{ - u32 *crcp = shash_desc_ctx(desc); - - *crcp = crc32c_compute(*crcp, data, len); - return 0; -} - -static int __crc32c_sparc64_finup(const u32 *crcp, const u8 *data, - unsigned int len, u8 *out) -{ - put_unaligned_le32(~crc32c_compute(*crcp, data, len), out); - return 0; -} - -static int crc32c_sparc64_finup(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) -{ - return __crc32c_sparc64_finup(shash_desc_ctx(desc), data, len, out); -} - -static int crc32c_sparc64_final(struct shash_desc *desc, u8 *out) -{ - u32 *crcp = shash_desc_ctx(desc); - - put_unaligned_le32(~*crcp, out); - return 0; -} - -static int crc32c_sparc64_digest(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) -{ - return __crc32c_sparc64_finup(crypto_shash_ctx(desc->tfm), data, len, - out); -} - -static int crc32c_sparc64_cra_init(struct crypto_tfm *tfm) -{ - u32 *key = crypto_tfm_ctx(tfm); - - *key = ~0; - - return 0; -} - -#define CHKSUM_BLOCK_SIZE 1 -#define CHKSUM_DIGEST_SIZE 4 - -static struct shash_alg alg = { - .setkey = crc32c_sparc64_setkey, - .init = crc32c_sparc64_init, - .update = crc32c_sparc64_update, - .final = crc32c_sparc64_final, - .finup = crc32c_sparc64_finup, - .digest = crc32c_sparc64_digest, - .descsize = sizeof(u32), - .digestsize = CHKSUM_DIGEST_SIZE, - .base = { - .cra_name = "crc32c", - .cra_driver_name = "crc32c-sparc64", - .cra_priority = SPARC_CR_OPCODE_PRIORITY, - .cra_flags = CRYPTO_ALG_OPTIONAL_KEY, - .cra_blocksize = CHKSUM_BLOCK_SIZE, - .cra_ctxsize = sizeof(u32), - .cra_module = THIS_MODULE, - .cra_init = crc32c_sparc64_cra_init, - } -}; - -static bool __init sparc64_has_crc32c_opcode(void) -{ - unsigned long cfr; - - if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO)) - return false; - - __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr)); - if (!(cfr & CFR_CRC32C)) - return false; - - return true; -} - -static int __init crc32c_sparc64_mod_init(void) -{ - if (sparc64_has_crc32c_opcode()) { - pr_info("Using sparc64 crc32c opcode optimized CRC32C implementation\n"); - return crypto_register_shash(&alg); - } - pr_info("sparc64 crc32c opcode not available.\n"); - return -ENODEV; -} - -static void __exit crc32c_sparc64_mod_fini(void) -{ - crypto_unregister_shash(&alg); -} - -module_init(crc32c_sparc64_mod_init); -module_exit(crc32c_sparc64_mod_fini); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("CRC32c (Castagnoli), sparc64 crc32c opcode accelerated"); - -MODULE_ALIAS_CRYPTO("crc32c"); - -#include "crop_devid.c" diff --git a/arch/sparc/lib/Makefile b/arch/sparc/lib/Makefile index ee5091dd67ed7..5724d0f356eb5 100644 --- a/arch/sparc/lib/Makefile +++ b/arch/sparc/lib/Makefile @@ -51,5 +51,7 @@ lib-$(CONFIG_SPARC64) += copy_in_user.o memmove.o lib-$(CONFIG_SPARC64) += mcount.o ipcsum.o xor.o hweight.o ffs.o obj-$(CONFIG_SPARC64) += iomap.o obj-$(CONFIG_SPARC32) += atomic32.o obj-$(CONFIG_SPARC64) += PeeCeeI.o +obj-$(CONFIG_CRC32_ARCH) += crc32-sparc.o +crc32-sparc-y := crc32_glue.o crc32c_asm.o diff --git a/arch/sparc/lib/crc32_glue.c b/arch/sparc/lib/crc32_glue.c new file mode 100644 index 0000000000000..ef2eadf4a303e --- /dev/null +++ b/arch/sparc/lib/crc32_glue.c @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Glue code for CRC32C optimized for sparc64 crypto opcodes. + * + * This is based largely upon arch/x86/crypto/crc32c-intel.c + * + * Copyright (C) 2008 Intel Corporation + * Authors: Austin Zhang + * Kent Liu + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include + +static DEFINE_STATIC_KEY_FALSE(have_crc32c_opcode); + +u32 crc32_le_arch(u32 crc, const u8 *data, size_t len) +{ + return crc32_le_base(crc, data, len); +} +EXPORT_SYMBOL(crc32_le_arch); + +void crc32c_sparc64(u32 *crcp, const u64 *data, size_t len); + +u32 crc32c_le_arch(u32 crc, const u8 *data, size_t len) +{ + size_t n = -(uintptr_t)data & 7; + + if (!static_branch_likely(&have_crc32c_opcode)) + return crc32c_le_base(crc, data, len); + + if (n) { + /* Data isn't 8-byte aligned. Align it. */ + n = min(n, len); + crc = crc32c_le_base(crc, data, n); + data += n; + len -= n; + } + n = len & ~7U; + if (n) { + crc32c_sparc64(&crc, (const u64 *)data, n); + data += n; + len -= n; + } + if (len) + crc = crc32c_le_base(crc, data, len); + return crc; +} +EXPORT_SYMBOL(crc32c_le_arch); + +u32 crc32_be_arch(u32 crc, const u8 *data, size_t len) +{ + return crc32_be_base(crc, data, len); +} +EXPORT_SYMBOL(crc32_be_arch); + +static int __init crc32_sparc_init(void) +{ + unsigned long cfr; + + if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO)) + return 0; + + __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr)); + if (!(cfr & CFR_CRC32C)) + return 0; + + static_branch_enable(&have_crc32c_opcode); + pr_info("Using sparc64 crc32c opcode optimized CRC32C implementation\n"); + return 0; +} +arch_initcall(crc32_sparc_init); + +static void __exit crc32_sparc_exit(void) +{ +} +module_exit(crc32_sparc_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("CRC32c (Castagnoli), sparc64 crc32c opcode accelerated"); diff --git a/arch/sparc/crypto/crc32c_asm.S b/arch/sparc/lib/crc32c_asm.S similarity index 92% rename from arch/sparc/crypto/crc32c_asm.S rename to arch/sparc/lib/crc32c_asm.S index b8659a479242d..ee454fa6aed68 100644 --- a/arch/sparc/crypto/crc32c_asm.S +++ b/arch/sparc/lib/crc32c_asm.S @@ -1,11 +1,11 @@ /* SPDX-License-Identifier: GPL-2.0 */ #include #include #include -#include "opcodes.h" +#include "../crypto/opcodes.h" ENTRY(crc32c_sparc64) /* %o0=crc32p, %o1=data_ptr, %o2=len */ VISEntryHalf lda [%o0] ASI_PL, %f1