Merge tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux

Pull CRC updates from Eric Biggers:

 - Reorganize the architecture-optimized CRC32 and CRC-T10DIF code to be
   directly accessible via the library API, instead of requiring the
   crypto API. This is much simpler and more efficient.

 - Convert some users such as ext4 to use the CRC32 library API instead
   of the crypto API. More conversions like this will come later.

 - Add a KUnit test that tests and benchmarks multiple CRC variants.
   Remove older, less-comprehensive tests that are made redundant by
   this.

 - Add an entry to MAINTAINERS for the kernel's CRC library code. I'm
   volunteering to maintain it. I have additional cleanups and
   optimizations planned for future cycles.

* tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux: (31 commits)
  MAINTAINERS: add entry for CRC library
  powerpc/crc: delete obsolete crc-vpmsum_test.c
  lib/crc32test: delete obsolete crc32test.c
  lib/crc16_kunit: delete obsolete crc16_kunit.c
  lib/crc_kunit.c: add KUnit test suite for CRC library functions
  powerpc/crc-t10dif: expose CRC-T10DIF function through lib
  arm64/crc-t10dif: expose CRC-T10DIF function through lib
  arm/crc-t10dif: expose CRC-T10DIF function through lib
  x86/crc-t10dif: expose CRC-T10DIF function through lib
  crypto: crct10dif - expose arch-optimized lib function
  lib/crc-t10dif: add support for arch overrides
  lib/crc-t10dif: stop wrapping the crypto API
  scsi: target: iscsi: switch to using the crc32c library
  f2fs: switch to using the crc32 library
  jbd2: switch to using the crc32c library
  ext4: switch to using the crc32c library
  lib/crc32: make crc32c() go directly to lib
  bcachefs: Explicitly select CRYPTO from BCACHEFS_FS
  x86/crc32: expose CRC32 functions through lib
  x86/crc32: update prototype for crc32_pclmul_le_16()
  ...

13 files changed, 116 insertions, 402 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 34b965fa45ac..424f188e62d9 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -127,6 +127,8 @@ config PPC
 	select ARCH_ENABLE_MEMORY_HOTPLUG
 	select ARCH_ENABLE_MEMORY_HOTREMOVE
 	select ARCH_HAS_COPY_MC			if PPC64
+	select ARCH_HAS_CRC32			if PPC64 && ALTIVEC
+	select ARCH_HAS_CRC_T10DIF		if PPC64 && ALTIVEC
 	select ARCH_HAS_CURRENT_STACK_POINTER
 	select ARCH_HAS_DEBUG_VIRTUAL
 	select ARCH_HAS_DEBUG_VM_PGTABLE
diff --git a/arch/powerpc/configs/powernv_defconfig b/arch/powerpc/configs/powernv_defconfig
index ee84ade7a033..6b6d7467fecf 100644
--- a/arch/powerpc/configs/powernv_defconfig
+++ b/arch/powerpc/configs/powernv_defconfig
@@ -320,8 +320,6 @@ CONFIG_XMON=y
 CONFIG_CRYPTO_TEST=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_HMAC=y
-CONFIG_CRYPTO_CRC32C_VPMSUM=m
-CONFIG_CRYPTO_CRCT10DIF_VPMSUM=m
 CONFIG_CRYPTO_MD5_PPC=m
 CONFIG_CRYPTO_MICHAEL_MIC=m
 CONFIG_CRYPTO_SHA1_PPC=m
diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig
index f39c0d000c43..465eb96c755e 100644
--- a/arch/powerpc/configs/ppc64_defconfig
+++ b/arch/powerpc/configs/ppc64_defconfig
@@ -389,9 +389,6 @@ CONFIG_CRYPTO_MICHAEL_MIC=m
 CONFIG_CRYPTO_SHA256=y
 CONFIG_CRYPTO_WP512=m
 CONFIG_CRYPTO_LZO=m
-CONFIG_CRYPTO_CRC32C_VPMSUM=m
-CONFIG_CRYPTO_CRCT10DIF_VPMSUM=m
-CONFIG_CRYPTO_VPMSUM_TESTER=m
 CONFIG_CRYPTO_MD5_PPC=m
 CONFIG_CRYPTO_SHA1_PPC=m
 CONFIG_CRYPTO_AES_GCM_P10=m
diff --git a/arch/powerpc/crypto/Kconfig b/arch/powerpc/crypto/Kconfig
index 951a43726461..5b315e9756b3 100644
--- a/arch/powerpc/crypto/Kconfig
+++ b/arch/powerpc/crypto/Kconfig
@@ -13,39 +13,6 @@ config CRYPTO_CURVE25519_PPC64
 	  Architecture: PowerPC64
 	  - Little-endian
 
-config CRYPTO_CRC32C_VPMSUM
-	tristate "CRC32c"
-	depends on PPC64 && ALTIVEC
-	select CRYPTO_HASH
-	select CRC32
-	help
-	  CRC32c CRC algorithm with the iSCSI polynomial (RFC 3385 and RFC 3720)
-
-	  Architecture: powerpc64 using
-	  - AltiVec extensions
-
-	  Enable on POWER8 and newer processors for improved performance.
-
-config CRYPTO_CRCT10DIF_VPMSUM
-	tristate "CRC32T10DIF"
-	depends on PPC64 && ALTIVEC && CRC_T10DIF
-	select CRYPTO_HASH
-	help
-	  CRC16 CRC algorithm used for the T10 (SCSI) Data Integrity Field (DIF)
-
-	  Architecture: powerpc64 using
-	  - AltiVec extensions
-
-	  Enable on POWER8 and newer processors for improved performance.
-
-config CRYPTO_VPMSUM_TESTER
-	tristate "CRC32c and CRC32T10DIF hardware acceleration tester"
-	depends on CRYPTO_CRCT10DIF_VPMSUM && CRYPTO_CRC32C_VPMSUM
-	help
-	  Stress test for CRC32c and CRCT10DIF algorithms implemented with
-	  powerpc64 AltiVec extensions (POWER8 vpmsum instructions).
-	  Unless you are testing these algorithms, you don't need this.
-
 config CRYPTO_MD5_PPC
 	tristate "Digests: MD5"
 	depends on PPC
diff --git a/arch/powerpc/crypto/Makefile b/arch/powerpc/crypto/Makefile
index 59808592f0a1..9b38f4a7bc15 100644
--- a/arch/powerpc/crypto/Makefile
+++ b/arch/powerpc/crypto/Makefile
@@ -10,9 +10,6 @@ obj-$(CONFIG_CRYPTO_MD5_PPC) += md5-ppc.o
 obj-$(CONFIG_CRYPTO_SHA1_PPC) += sha1-powerpc.o
 obj-$(CONFIG_CRYPTO_SHA1_PPC_SPE) += sha1-ppc-spe.o
 obj-$(CONFIG_CRYPTO_SHA256_PPC_SPE) += sha256-ppc-spe.o
-obj-$(CONFIG_CRYPTO_CRC32C_VPMSUM) += crc32c-vpmsum.o
-obj-$(CONFIG_CRYPTO_CRCT10DIF_VPMSUM) += crct10dif-vpmsum.o
-obj-$(CONFIG_CRYPTO_VPMSUM_TESTER) += crc-vpmsum_test.o
 obj-$(CONFIG_CRYPTO_AES_GCM_P10) += aes-gcm-p10-crypto.o
 obj-$(CONFIG_CRYPTO_CHACHA20_P10) += chacha-p10-crypto.o
 obj-$(CONFIG_CRYPTO_POLY1305_P10) += poly1305-p10-crypto.o
@@ -24,8 +21,6 @@ md5-ppc-y := md5-asm.o md5-glue.o
 sha1-powerpc-y := sha1-powerpc-asm.o sha1.o
 sha1-ppc-spe-y := sha1-spe-asm.o sha1-spe-glue.o
 sha256-ppc-spe-y := sha256-spe-asm.o sha256-spe-glue.o
-crc32c-vpmsum-y := crc32c-vpmsum_asm.o crc32c-vpmsum_glue.o
-crct10dif-vpmsum-y := crct10dif-vpmsum_asm.o crct10dif-vpmsum_glue.o
 aes-gcm-p10-crypto-y := aes-gcm-p10-glue.o aes-gcm-p10.o ghashp10-ppc.o aesp10-ppc.o
 chacha-p10-crypto-y := chacha-p10-glue.o chacha-p10le-8x.o
 poly1305-p10-crypto-y := poly1305-p10-glue.o poly1305-p10le_64.o
diff --git a/arch/powerpc/crypto/crc-vpmsum_test.c b/arch/powerpc/crypto/crc-vpmsum_test.c
deleted file mode 100644
index c61a874a3a5c..000000000000
--- a/arch/powerpc/crypto/crc-vpmsum_test.c
+++ /dev/null
@@ -1,133 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * CRC vpmsum tester
- * Copyright 2017 Daniel Axtens, IBM Corporation.
- */
-
-#include <linux/crc-t10dif.h>
-#include <linux/crc32.h>
-#include <crypto/internal/hash.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/random.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/cpufeature.h>
-#include <asm/switch_to.h>
-
-static unsigned long iterations = 10000;
-
-#define MAX_CRC_LENGTH 65535
-
-
-static int __init crc_test_init(void)
-{
-	u16 crc16 = 0, verify16 = 0;
-	__le32 verify32le = 0;
-	unsigned char *data;
-	u32 verify32 = 0;
-	unsigned long i;
-	__le32 crc32;
-	int ret;
-
-	struct crypto_shash *crct10dif_tfm;
-	struct crypto_shash *crc32c_tfm;
-
-	if (!cpu_has_feature(CPU_FTR_ARCH_207S))
-		return -ENODEV;
-
-	data = kmalloc(MAX_CRC_LENGTH, GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-
-	crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0);
-
-	if (IS_ERR(crct10dif_tfm)) {
-		pr_err("Error allocating crc-t10dif\n");
-		goto free_buf;
-	}
-
-	crc32c_tfm = crypto_alloc_shash("crc32c", 0, 0);
-
-	if (IS_ERR(crc32c_tfm)) {
-		pr_err("Error allocating crc32c\n");
-		goto free_16;
-	}
-
-	do {
-		SHASH_DESC_ON_STACK(crct10dif_shash, crct10dif_tfm);
-		SHASH_DESC_ON_STACK(crc32c_shash, crc32c_tfm);
-
-		crct10dif_shash->tfm = crct10dif_tfm;
-		ret = crypto_shash_init(crct10dif_shash);
-
-		if (ret) {
-			pr_err("Error initing crc-t10dif\n");
-			goto free_32;
-		}
-
-
-		crc32c_shash->tfm = crc32c_tfm;
-		ret = crypto_shash_init(crc32c_shash);
-
-		if (ret) {
-			pr_err("Error initing crc32c\n");
-			goto free_32;
-		}
-
-		pr_info("crc-vpmsum_test begins, %lu iterations\n", iterations);
-		for (i=0; i<iterations; i++) {
-			size_t offset = get_random_u32_below(16);
-			size_t len = get_random_u32_below(MAX_CRC_LENGTH);
-
-			if (len <= offset)
-				continue;
-			get_random_bytes(data, len);
-			len -= offset;
-
-			crypto_shash_update(crct10dif_shash, data+offset, len);
-			crypto_shash_final(crct10dif_shash, (u8 *)(&crc16));
-			verify16 = crc_t10dif_generic(verify16, data+offset, len);
-
-
-			if (crc16 != verify16) {
-				pr_err("FAILURE in CRC16: got 0x%04x expected 0x%04x (len %lu)\n",
-				       crc16, verify16, len);
-				break;
-			}
-
-			crypto_shash_update(crc32c_shash, data+offset, len);
-			crypto_shash_final(crc32c_shash, (u8 *)(&crc32));
-			verify32 = le32_to_cpu(verify32le);
-		        verify32le = ~cpu_to_le32(__crc32c_le(~verify32, data+offset, len));
-			if (crc32 != verify32le) {
-				pr_err("FAILURE in CRC32: got 0x%08x expected 0x%08x (len %lu)\n",
-				       crc32, verify32, len);
-				break;
-			}
-		cond_resched();
-		}
-		pr_info("crc-vpmsum_test done, completed %lu iterations\n", i);
-	} while (0);
-
-free_32:
-	crypto_free_shash(crc32c_tfm);
-
-free_16:
-	crypto_free_shash(crct10dif_tfm);
-
-free_buf:
-	kfree(data);
-
-	return 0;
-}
-
-static void __exit crc_test_exit(void) {}
-
-module_init(crc_test_init);
-module_exit(crc_test_exit);
-module_param(iterations, long, 0400);
-
-MODULE_AUTHOR("Daniel Axtens <dja@axtens.net>");
-MODULE_DESCRIPTION("Vector polynomial multiply-sum CRC tester");
-MODULE_LICENSE("GPL");
diff --git a/arch/powerpc/crypto/crc32c-vpmsum_glue.c b/arch/powerpc/crypto/crc32c-vpmsum_glue.c
deleted file mode 100644
index 63760b7dbb76..000000000000
--- a/arch/powerpc/crypto/crc32c-vpmsum_glue.c
+++ /dev/null
@@ -1,173 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-#include <linux/crc32.h>
-#include <crypto/internal/hash.h>
-#include <crypto/internal/simd.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/cpufeature.h>
-#include <asm/simd.h>
-#include <asm/switch_to.h>
-
-#define CHKSUM_BLOCK_SIZE	1
-#define CHKSUM_DIGEST_SIZE	4
-
-#define VMX_ALIGN		16
-#define VMX_ALIGN_MASK		(VMX_ALIGN-1)
-
-#define VECTOR_BREAKPOINT	512
-
-u32 __crc32c_vpmsum(u32 crc, unsigned char const *p, size_t len);
-
-static u32 crc32c_vpmsum(u32 crc, unsigned char const *p, size_t len)
-{
-	unsigned int prealign;
-	unsigned int tail;
-
-	if (len < (VECTOR_BREAKPOINT + VMX_ALIGN) || !crypto_simd_usable())
-		return __crc32c_le(crc, p, len);
-
-	if ((unsigned long)p & VMX_ALIGN_MASK) {
-		prealign = VMX_ALIGN - ((unsigned long)p & VMX_ALIGN_MASK);
-		crc = __crc32c_le(crc, p, prealign);
-		len -= prealign;
-		p += prealign;
-	}
-
-	if (len & ~VMX_ALIGN_MASK) {
-		preempt_disable();
-		pagefault_disable();
-		enable_kernel_altivec();
-		crc = __crc32c_vpmsum(crc, p, len & ~VMX_ALIGN_MASK);
-		disable_kernel_altivec();
-		pagefault_enable();
-		preempt_enable();
-	}
-
-	tail = len & VMX_ALIGN_MASK;
-	if (tail) {
-		p += len & ~VMX_ALIGN_MASK;
-		crc = __crc32c_le(crc, p, tail);
-	}
-
-	return crc;
-}
-
-static int crc32c_vpmsum_cra_init(struct crypto_tfm *tfm)
-{
-	u32 *key = crypto_tfm_ctx(tfm);
-
-	*key = ~0;
-
-	return 0;
-}
-
-/*
- * 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_vpmsum_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 crc32c_vpmsum_init(struct shash_desc *desc)
-{
-	u32 *mctx = crypto_shash_ctx(desc->tfm);
-	u32 *crcp = shash_desc_ctx(desc);
-
-	*crcp = *mctx;
-
-	return 0;
-}
-
-static int crc32c_vpmsum_update(struct shash_desc *desc, const u8 *data,
-			       unsigned int len)
-{
-	u32 *crcp = shash_desc_ctx(desc);
-
-	*crcp = crc32c_vpmsum(*crcp, data, len);
-
-	return 0;
-}
-
-static int __crc32c_vpmsum_finup(u32 *crcp, const u8 *data, unsigned int len,
-				u8 *out)
-{
-	*(__le32 *)out = ~cpu_to_le32(crc32c_vpmsum(*crcp, data, len));
-
-	return 0;
-}
-
-static int crc32c_vpmsum_finup(struct shash_desc *desc, const u8 *data,
-			      unsigned int len, u8 *out)
-{
-	return __crc32c_vpmsum_finup(shash_desc_ctx(desc), data, len, out);
-}
-
-static int crc32c_vpmsum_final(struct shash_desc *desc, u8 *out)
-{
-	u32 *crcp = shash_desc_ctx(desc);
-
-	*(__le32 *)out = ~cpu_to_le32p(crcp);
-
-	return 0;
-}
-
-static int crc32c_vpmsum_digest(struct shash_desc *desc, const u8 *data,
-			       unsigned int len, u8 *out)
-{
-	return __crc32c_vpmsum_finup(crypto_shash_ctx(desc->tfm), data, len,
-				     out);
-}
-
-static struct shash_alg alg = {
-	.setkey		= crc32c_vpmsum_setkey,
-	.init		= crc32c_vpmsum_init,
-	.update		= crc32c_vpmsum_update,
-	.final		= crc32c_vpmsum_final,
-	.finup		= crc32c_vpmsum_finup,
-	.digest		= crc32c_vpmsum_digest,
-	.descsize	= sizeof(u32),
-	.digestsize	= CHKSUM_DIGEST_SIZE,
-	.base		= {
-		.cra_name		= "crc32c",
-		.cra_driver_name	= "crc32c-vpmsum",
-		.cra_priority		= 200,
-		.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
-		.cra_blocksize		= CHKSUM_BLOCK_SIZE,
-		.cra_ctxsize		= sizeof(u32),
-		.cra_module		= THIS_MODULE,
-		.cra_init		= crc32c_vpmsum_cra_init,
-	}
-};
-
-static int __init crc32c_vpmsum_mod_init(void)
-{
-	if (!cpu_has_feature(CPU_FTR_ARCH_207S))
-		return -ENODEV;
-
-	return crypto_register_shash(&alg);
-}
-
-static void __exit crc32c_vpmsum_mod_fini(void)
-{
-	crypto_unregister_shash(&alg);
-}
-
-module_cpu_feature_match(PPC_MODULE_FEATURE_VEC_CRYPTO, crc32c_vpmsum_mod_init);
-module_exit(crc32c_vpmsum_mod_fini);
-
-MODULE_AUTHOR("Anton Blanchard <anton@samba.org>");
-MODULE_DESCRIPTION("CRC32C using vector polynomial multiply-sum instructions");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_CRYPTO("crc32c");
-MODULE_ALIAS_CRYPTO("crc32c-vpmsum");
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index f14ecab674a3..dd8a4b52a0cc 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -78,4 +78,10 @@ CFLAGS_xor_vmx.o += -mhard-float -maltivec $(call cc-option,-mabi=altivec)
 # Enable <altivec.h>
 CFLAGS_xor_vmx.o += -isystem $(shell $(CC) -print-file-name=include)
 
+obj-$(CONFIG_CRC32_ARCH) += crc32-powerpc.o
+crc32-powerpc-y := crc32-glue.o crc32c-vpmsum_asm.o
+
+obj-$(CONFIG_CRC_T10DIF_ARCH) += crc-t10dif-powerpc.o
+crc-t10dif-powerpc-y := crc-t10dif-glue.o crct10dif-vpmsum_asm.o
+
 obj-$(CONFIG_PPC64) += $(obj64-y)
diff --git a/arch/powerpc/crypto/crct10dif-vpmsum_glue.c b/arch/powerpc/lib/crc-t10dif-glue.c
index 1dc8b6915178..730850dbc51d 100644
--- a/arch/powerpc/crypto/crct10dif-vpmsum_glue.c
+++ b/arch/powerpc/lib/crc-t10dif-glue.c
@@ -7,7 +7,6 @@
  */
 
 #include <linux/crc-t10dif.h>
-#include <crypto/internal/hash.h>
 #include <crypto/internal/simd.h>
 #include <linux/init.h>
 #include <linux/module.h>
@@ -22,15 +21,18 @@
 
 #define VECTOR_BREAKPOINT	64
 
+static DEFINE_STATIC_KEY_FALSE(have_vec_crypto);
+
 u32 __crct10dif_vpmsum(u32 crc, unsigned char const *p, size_t len);
 
-static u16 crct10dif_vpmsum(u16 crci, unsigned char const *p, size_t len)
+u16 crc_t10dif_arch(u16 crci, const u8 *p, size_t len)
 {
 	unsigned int prealign;
 	unsigned int tail;
 	u32 crc = crci;
 
-	if (len < (VECTOR_BREAKPOINT + VMX_ALIGN) || !crypto_simd_usable())
+	if (len < (VECTOR_BREAKPOINT + VMX_ALIGN) ||
+	    !static_branch_likely(&have_vec_crypto) || !crypto_simd_usable())
 		return crc_t10dif_generic(crc, p, len);
 
 	if ((unsigned long)p & VMX_ALIGN_MASK) {
@@ -60,67 +62,28 @@ static u16 crct10dif_vpmsum(u16 crci, unsigned char const *p, size_t len)
 
 	return crc & 0xffff;
 }
+EXPORT_SYMBOL(crc_t10dif_arch);
 
-static int crct10dif_vpmsum_init(struct shash_desc *desc)
-{
-	u16 *crc = shash_desc_ctx(desc);
-
-	*crc = 0;
-	return 0;
-}
-
-static int crct10dif_vpmsum_update(struct shash_desc *desc, const u8 *data,
-			    unsigned int length)
-{
-	u16 *crc = shash_desc_ctx(desc);
-
-	*crc = crct10dif_vpmsum(*crc, data, length);
-
-	return 0;
-}
-
-
-static int crct10dif_vpmsum_final(struct shash_desc *desc, u8 *out)
+static int __init crc_t10dif_powerpc_init(void)
 {
-	u16 *crcp = shash_desc_ctx(desc);
-
-	*(u16 *)out = *crcp;
+	if (cpu_has_feature(CPU_FTR_ARCH_207S) &&
+	    (cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_VEC_CRYPTO))
+		static_branch_enable(&have_vec_crypto);
 	return 0;
 }
+arch_initcall(crc_t10dif_powerpc_init);
 
-static struct shash_alg alg = {
-	.init		= crct10dif_vpmsum_init,
-	.update		= crct10dif_vpmsum_update,
-	.final		= crct10dif_vpmsum_final,
-	.descsize	= CRC_T10DIF_DIGEST_SIZE,
-	.digestsize	= CRC_T10DIF_DIGEST_SIZE,
-	.base		= {
-		.cra_name		= "crct10dif",
-		.cra_driver_name	= "crct10dif-vpmsum",
-		.cra_priority		= 200,
-		.cra_blocksize		= CRC_T10DIF_BLOCK_SIZE,
-		.cra_module		= THIS_MODULE,
-	}
-};
-
-static int __init crct10dif_vpmsum_mod_init(void)
+static void __exit crc_t10dif_powerpc_exit(void)
 {
-	if (!cpu_has_feature(CPU_FTR_ARCH_207S))
-		return -ENODEV;
-
-	return crypto_register_shash(&alg);
 }
+module_exit(crc_t10dif_powerpc_exit);
 
-static void __exit crct10dif_vpmsum_mod_fini(void)
+bool crc_t10dif_is_optimized(void)
 {
-	crypto_unregister_shash(&alg);
+	return static_key_enabled(&have_vec_crypto);
 }
-
-module_cpu_feature_match(PPC_MODULE_FEATURE_VEC_CRYPTO, crct10dif_vpmsum_mod_init);
-module_exit(crct10dif_vpmsum_mod_fini);
+EXPORT_SYMBOL(crc_t10dif_is_optimized);
 
 MODULE_AUTHOR("Daniel Axtens <dja@axtens.net>");
 MODULE_DESCRIPTION("CRCT10DIF using vector polynomial multiply-sum instructions");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS_CRYPTO("crct10dif");
-MODULE_ALIAS_CRYPTO("crct10dif-vpmsum");
diff --git a/arch/powerpc/lib/crc32-glue.c b/arch/powerpc/lib/crc32-glue.c
new file mode 100644
index 000000000000..79cc954f499f
--- /dev/null
+++ b/arch/powerpc/lib/crc32-glue.c
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/crc32.h>
+#include <crypto/internal/simd.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/cpufeature.h>
+#include <asm/simd.h>
+#include <asm/switch_to.h>
+
+#define VMX_ALIGN		16
+#define VMX_ALIGN_MASK		(VMX_ALIGN-1)
+
+#define VECTOR_BREAKPOINT	512
+
+static DEFINE_STATIC_KEY_FALSE(have_vec_crypto);
+
+u32 __crc32c_vpmsum(u32 crc, const u8 *p, size_t len);
+
+u32 crc32_le_arch(u32 crc, const u8 *p, size_t len)
+{
+	return crc32_le_base(crc, p, len);
+}
+EXPORT_SYMBOL(crc32_le_arch);
+
+u32 crc32c_le_arch(u32 crc, const u8 *p, size_t len)
+{
+	unsigned int prealign;
+	unsigned int tail;
+
+	if (len < (VECTOR_BREAKPOINT + VMX_ALIGN) ||
+	    !static_branch_likely(&have_vec_crypto) || !crypto_simd_usable())
+		return crc32c_le_base(crc, p, len);
+
+	if ((unsigned long)p & VMX_ALIGN_MASK) {
+		prealign = VMX_ALIGN - ((unsigned long)p & VMX_ALIGN_MASK);
+		crc = crc32c_le_base(crc, p, prealign);
+		len -= prealign;
+		p += prealign;
+	}
+
+	if (len & ~VMX_ALIGN_MASK) {
+		preempt_disable();
+		pagefault_disable();
+		enable_kernel_altivec();
+		crc = __crc32c_vpmsum(crc, p, len & ~VMX_ALIGN_MASK);
+		disable_kernel_altivec();
+		pagefault_enable();
+		preempt_enable();
+	}
+
+	tail = len & VMX_ALIGN_MASK;
+	if (tail) {
+		p += len & ~VMX_ALIGN_MASK;
+		crc = crc32c_le_base(crc, p, tail);
+	}
+
+	return crc;
+}
+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_powerpc_init(void)
+{
+	if (cpu_has_feature(CPU_FTR_ARCH_207S) &&
+	    (cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_VEC_CRYPTO))
+		static_branch_enable(&have_vec_crypto);
+	return 0;
+}
+arch_initcall(crc32_powerpc_init);
+
+static void __exit crc32_powerpc_exit(void)
+{
+}
+module_exit(crc32_powerpc_exit);
+
+u32 crc32_optimizations(void)
+{
+	if (static_key_enabled(&have_vec_crypto))
+		return CRC32C_OPTIMIZATION;
+	return 0;
+}
+EXPORT_SYMBOL(crc32_optimizations);
+
+MODULE_AUTHOR("Anton Blanchard <anton@samba.org>");
+MODULE_DESCRIPTION("CRC32C using vector polynomial multiply-sum instructions");
+MODULE_LICENSE("GPL");
diff --git a/arch/powerpc/crypto/crc32-vpmsum_core.S b/arch/powerpc/lib/crc32-vpmsum_core.S
index b0f87f595b26..b0f87f595b26 100644
--- a/arch/powerpc/crypto/crc32-vpmsum_core.S
+++ b/arch/powerpc/lib/crc32-vpmsum_core.S
diff --git a/arch/powerpc/crypto/crc32c-vpmsum_asm.S b/arch/powerpc/lib/crc32c-vpmsum_asm.S
index bf442004ea1f..bf442004ea1f 100644
--- a/arch/powerpc/crypto/crc32c-vpmsum_asm.S
+++ b/arch/powerpc/lib/crc32c-vpmsum_asm.S
diff --git a/arch/powerpc/crypto/crct10dif-vpmsum_asm.S b/arch/powerpc/lib/crct10dif-vpmsum_asm.S
index f0b93a0fe168..f0b93a0fe168 100644
--- a/arch/powerpc/crypto/crct10dif-vpmsum_asm.S
+++ b/arch/powerpc/lib/crct10dif-vpmsum_asm.S