@@ -75,10 +75,11 @@ config X86
select ARCH_HAS_CACHE_LINE_SIZE
select ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION
select ARCH_HAS_CPU_FINALIZE_INIT
select ARCH_HAS_CPU_PASID if IOMMU_SVA
select ARCH_HAS_CRC32
+ select ARCH_HAS_CRC_T10DIF if X86_64
select ARCH_HAS_CURRENT_STACK_POINTER
select ARCH_HAS_DEBUG_VIRTUAL
select ARCH_HAS_DEBUG_VM_PGTABLE if !X86_PAE
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_DMA_OPS if GART_IOMMU || XEN
@@ -490,16 +490,6 @@ config CRYPTO_GHASH_CLMUL_NI_INTEL
GCM GHASH hash function (NIST SP800-38D)
Architecture: x86_64 using:
- CLMUL-NI (carry-less multiplication new instructions)
-config CRYPTO_CRCT10DIF_PCLMUL
- tristate "CRCT10DIF (PCLMULQDQ)"
- depends on X86 && 64BIT && CRC_T10DIF
- select CRYPTO_HASH
- help
- CRC16 CRC algorithm used for the T10 (SCSI) Data Integrity Field (DIF)
-
- Architecture: x86_64 using:
- - PCLMULQDQ (carry-less multiplication)
-
endmenu
@@ -73,13 +73,10 @@ obj-$(CONFIG_CRYPTO_GHASH_CLMUL_NI_INTEL) += ghash-clmulni-intel.o
ghash-clmulni-intel-y := ghash-clmulni-intel_asm.o ghash-clmulni-intel_glue.o
obj-$(CONFIG_CRYPTO_POLYVAL_CLMUL_NI) += polyval-clmulni.o
polyval-clmulni-y := polyval-clmulni_asm.o polyval-clmulni_glue.o
-obj-$(CONFIG_CRYPTO_CRCT10DIF_PCLMUL) += crct10dif-pclmul.o
-crct10dif-pclmul-y := crct10dif-pcl-asm_64.o crct10dif-pclmul_glue.o
-
obj-$(CONFIG_CRYPTO_POLY1305_X86_64) += poly1305-x86_64.o
poly1305-x86_64-y := poly1305-x86_64-cryptogams.o poly1305_glue.o
targets += poly1305-x86_64-cryptogams.S
obj-$(CONFIG_CRYPTO_NHPOLY1305_SSE2) += nhpoly1305-sse2.o
deleted file mode 100644
@@ -1,143 +0,0 @@
-/*
- * Cryptographic API.
- *
- * T10 Data Integrity Field CRC16 Crypto Transform using PCLMULQDQ Instructions
- *
- * Copyright (C) 2013 Intel Corporation
- * Author: Tim Chen <tim.c.chen@linux.intel.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- */
-
-#include <linux/types.h>
-#include <linux/module.h>
-#include <linux/crc-t10dif.h>
-#include <crypto/internal/hash.h>
-#include <crypto/internal/simd.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <asm/cpufeatures.h>
-#include <asm/cpu_device_id.h>
-#include <asm/simd.h>
-
-asmlinkage u16 crc_t10dif_pcl(u16 init_crc, const u8 *buf, size_t len);
-
-struct chksum_desc_ctx {
- __u16 crc;
-};
-
-static int chksum_init(struct shash_desc *desc)
-{
- struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
-
- ctx->crc = 0;
-
- return 0;
-}
-
-static int chksum_update(struct shash_desc *desc, const u8 *data,
- unsigned int length)
-{
- struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
-
- if (length >= 16 && crypto_simd_usable()) {
- kernel_fpu_begin();
- ctx->crc = crc_t10dif_pcl(ctx->crc, data, length);
- kernel_fpu_end();
- } else
- ctx->crc = crc_t10dif_generic(ctx->crc, data, length);
- return 0;
-}
-
-static int chksum_final(struct shash_desc *desc, u8 *out)
-{
- struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
-
- *(__u16 *)out = ctx->crc;
- return 0;
-}
-
-static int __chksum_finup(__u16 crc, const u8 *data, unsigned int len, u8 *out)
-{
- if (len >= 16 && crypto_simd_usable()) {
- kernel_fpu_begin();
- *(__u16 *)out = crc_t10dif_pcl(crc, data, len);
- kernel_fpu_end();
- } else
- *(__u16 *)out = crc_t10dif_generic(crc, data, len);
- return 0;
-}
-
-static int chksum_finup(struct shash_desc *desc, const u8 *data,
- unsigned int len, u8 *out)
-{
- struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
-
- return __chksum_finup(ctx->crc, data, len, out);
-}
-
-static int chksum_digest(struct shash_desc *desc, const u8 *data,
- unsigned int length, u8 *out)
-{
- return __chksum_finup(0, data, length, out);
-}
-
-static struct shash_alg alg = {
- .digestsize = CRC_T10DIF_DIGEST_SIZE,
- .init = chksum_init,
- .update = chksum_update,
- .final = chksum_final,
- .finup = chksum_finup,
- .digest = chksum_digest,
- .descsize = sizeof(struct chksum_desc_ctx),
- .base = {
- .cra_name = "crct10dif",
- .cra_driver_name = "crct10dif-pclmul",
- .cra_priority = 200,
- .cra_blocksize = CRC_T10DIF_BLOCK_SIZE,
- .cra_module = THIS_MODULE,
- }
-};
-
-static const struct x86_cpu_id crct10dif_cpu_id[] = {
- X86_MATCH_FEATURE(X86_FEATURE_PCLMULQDQ, NULL),
- {}
-};
-MODULE_DEVICE_TABLE(x86cpu, crct10dif_cpu_id);
-
-static int __init crct10dif_intel_mod_init(void)
-{
- if (!x86_match_cpu(crct10dif_cpu_id))
- return -ENODEV;
-
- return crypto_register_shash(&alg);
-}
-
-static void __exit crct10dif_intel_mod_fini(void)
-{
- crypto_unregister_shash(&alg);
-}
-
-module_init(crct10dif_intel_mod_init);
-module_exit(crct10dif_intel_mod_fini);
-
-MODULE_AUTHOR("Tim Chen <tim.c.chen@linux.intel.com>");
-MODULE_DESCRIPTION("T10 DIF CRC calculation accelerated with PCLMULQDQ.");
-MODULE_LICENSE("GPL");
-
-MODULE_ALIAS_CRYPTO("crct10dif");
-MODULE_ALIAS_CRYPTO("crct10dif-pclmul");
@@ -40,10 +40,13 @@ lib-$(CONFIG_MITIGATION_RETPOLINE) += retpoline.o
obj-$(CONFIG_CRC32_ARCH) += crc32-x86.o
crc32-x86-y := crc32-glue.o crc32-pclmul.o
crc32-x86-$(CONFIG_64BIT) += crc32c-3way.o
+obj-$(CONFIG_CRC_T10DIF_ARCH) += crc-t10dif-x86.o
+crc-t10dif-x86-y := crc-t10dif-glue.o crct10dif-pcl-asm_64.o
+
obj-y += msr.o msr-reg.o msr-reg-export.o hweight.o
obj-y += iomem.o
ifeq ($(CONFIG_X86_32),y)
obj-y += atomic64_32.o
new file mode 100644
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * CRC-T10DIF using PCLMULQDQ instructions
+ *
+ * Copyright 2024 Google LLC
+ */
+
+#include <asm/cpufeatures.h>
+#include <asm/simd.h>
+#include <crypto/internal/simd.h>
+#include <linux/crc-t10dif.h>
+#include <linux/module.h>
+
+static DEFINE_STATIC_KEY_FALSE(have_pclmulqdq);
+
+asmlinkage u16 crc_t10dif_pcl(u16 init_crc, const u8 *buf, size_t len);
+
+u16 crc_t10dif_arch(u16 crc, const u8 *p, size_t len)
+{
+ if (len >= 16 &&
+ static_key_enabled(&have_pclmulqdq) && crypto_simd_usable()) {
+ kernel_fpu_begin();
+ crc = crc_t10dif_pcl(crc, p, len);
+ kernel_fpu_end();
+ return crc;
+ }
+ return crc_t10dif_generic(crc, p, len);
+}
+EXPORT_SYMBOL(crc_t10dif_arch);
+
+static int __init crc_t10dif_x86_init(void)
+{
+ if (boot_cpu_has(X86_FEATURE_PCLMULQDQ))
+ static_branch_enable(&have_pclmulqdq);
+ return 0;
+}
+arch_initcall(crc_t10dif_x86_init);
+
+static void __exit crc_t10dif_x86_exit(void)
+{
+}
+module_exit(crc_t10dif_x86_exit);
+
+bool crc_t10dif_is_optimized(void)
+{
+ return static_key_enabled(&have_pclmulqdq);
+}
+EXPORT_SYMBOL(crc_t10dif_is_optimized);
+
+MODULE_DESCRIPTION("CRC-T10DIF using PCLMULQDQ instructions");
+MODULE_LICENSE("GPL");
similarity index 100%
rename from arch/x86/crypto/crct10dif-pcl-asm_64.S
rename to arch/x86/lib/crct10dif-pcl-asm_64.S