diff --git a/crypto/Kconfig b/crypto/Kconfig
index b75264b09a46..558eff07b799 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1508,6 +1508,20 @@ config CRYPTO_SERPENT_AVX2_X86_64
 	  See also:
 	  <http://www.cl.cam.ac.uk/~rja14/serpent.html>
 
+config CRYPTO_SPECK
+	tristate "Speck cipher algorithm"
+	select CRYPTO_ALGAPI
+	help
+	  Speck is a lightweight block cipher that is tuned for optimal
+	  performance in software (rather than hardware).
+
+	  Speck may not be as secure as AES, and should only be used on systems
+	  where AES is not fast enough.
+
+	  See also: <https://eprint.iacr.org/2013/404.pdf>
+
+	  If unsure, say N.
+
 config CRYPTO_TEA
 	tristate "TEA, XTEA and XETA cipher algorithms"
 	select CRYPTO_ALGAPI
diff --git a/crypto/Makefile b/crypto/Makefile
index cdbc03b35510..ba6019471447 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -110,6 +110,7 @@ obj-$(CONFIG_CRYPTO_TEA) += tea.o
 obj-$(CONFIG_CRYPTO_KHAZAD) += khazad.o
 obj-$(CONFIG_CRYPTO_ANUBIS) += anubis.o
 obj-$(CONFIG_CRYPTO_SEED) += seed.o
+obj-$(CONFIG_CRYPTO_SPECK) += speck.o
 obj-$(CONFIG_CRYPTO_SALSA20) += salsa20_generic.o
 obj-$(CONFIG_CRYPTO_CHACHA20) += chacha20_generic.o
 obj-$(CONFIG_CRYPTO_POLY1305) += poly1305_generic.o
diff --git a/crypto/speck.c b/crypto/speck.c
new file mode 100644
index 000000000000..4e80ad76bcd7
--- /dev/null
+++ b/crypto/speck.c
@@ -0,0 +1,299 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Speck: a lightweight block cipher
+ *
+ * Copyright (c) 2018 Google, Inc
+ *
+ * Speck has 10 variants, including 5 block sizes.  For now we only implement
+ * the variants Speck128/128, Speck128/192, Speck128/256, Speck64/96, and
+ * Speck64/128.   Speck${B}/${K} denotes the variant with a block size of B bits
+ * and a key size of K bits.  The Speck128 variants are believed to be the most
+ * secure variants, and they use the same block size and key sizes as AES.  The
+ * Speck64 variants are less secure, but on 32-bit processors are usually
+ * faster.  The remaining variants (Speck32, Speck48, and Speck96) are even less
+ * secure and/or not as well suited for implementation on either 32-bit or
+ * 64-bit processors, so are omitted.
+ *
+ * Reference: "The Simon and Speck Families of Lightweight Block Ciphers"
+ * https://eprint.iacr.org/2013/404.pdf
+ *
+ * In a correspondence, the Speck designers have also clarified that the words
+ * should be interpreted in little-endian format, and the words should be
+ * ordered such that the first word of each block is 'y' rather than 'x', and
+ * the first key word (rather than the last) becomes the first round key.
+ */
+
+#include <asm/unaligned.h>
+#include <linux/bitops.h>
+#include <linux/crypto.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+/* Speck128 */
+
+#define SPECK128_BLOCK_SIZE	16
+
+#define SPECK128_128_KEY_SIZE	16
+#define SPECK128_128_NROUNDS	32
+
+#define SPECK128_192_KEY_SIZE	24
+#define SPECK128_192_NROUNDS	33
+
+#define SPECK128_256_KEY_SIZE	32
+#define SPECK128_256_NROUNDS	34
+
+struct speck128_tfm_ctx {
+	u64 round_keys[SPECK128_256_NROUNDS];
+	int nrounds;
+};
+
+static __always_inline void speck128_round(u64 *x, u64 *y, u64 k)
+{
+	*x = ror64(*x, 8);
+	*x += *y;
+	*x ^= k;
+	*y = rol64(*y, 3);
+	*y ^= *x;
+}
+
+static __always_inline void speck128_unround(u64 *x, u64 *y, u64 k)
+{
+	*y ^= *x;
+	*y = ror64(*y, 3);
+	*x ^= k;
+	*x -= *y;
+	*x = rol64(*x, 8);
+}
+
+static void speck128_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
+{
+	const struct speck128_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+	u64 y = get_unaligned_le64(in);
+	u64 x = get_unaligned_le64(in + 8);
+	int i;
+
+	for (i = 0; i < ctx->nrounds; i++)
+		speck128_round(&x, &y, ctx->round_keys[i]);
+
+	put_unaligned_le64(y, out);
+	put_unaligned_le64(x, out + 8);
+}
+
+static void speck128_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
+{
+	const struct speck128_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+	u64 y = get_unaligned_le64(in);
+	u64 x = get_unaligned_le64(in + 8);
+	int i;
+
+	for (i = ctx->nrounds - 1; i >= 0; i--)
+		speck128_unround(&x, &y, ctx->round_keys[i]);
+
+	put_unaligned_le64(y, out);
+	put_unaligned_le64(x, out + 8);
+}
+
+static int speck128_setkey(struct crypto_tfm *tfm, const u8 *key,
+			   unsigned int keylen)
+{
+	struct speck128_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+	u64 l[3];
+	u64 k;
+	int i;
+
+	switch (keylen) {
+	case SPECK128_128_KEY_SIZE:
+		k = get_unaligned_le64(key);
+		l[0] = get_unaligned_le64(key + 8);
+		ctx->nrounds = SPECK128_128_NROUNDS;
+		for (i = 0; i < ctx->nrounds; i++) {
+			ctx->round_keys[i] = k;
+			speck128_round(&l[0], &k, i);
+		}
+		break;
+	case SPECK128_192_KEY_SIZE:
+		k = get_unaligned_le64(key);
+		l[0] = get_unaligned_le64(key + 8);
+		l[1] = get_unaligned_le64(key + 16);
+		ctx->nrounds = SPECK128_192_NROUNDS;
+		for (i = 0; i < ctx->nrounds; i++) {
+			ctx->round_keys[i] = k;
+			speck128_round(&l[i % 2], &k, i);
+		}
+		break;
+	case SPECK128_256_KEY_SIZE:
+		k = get_unaligned_le64(key);
+		l[0] = get_unaligned_le64(key + 8);
+		l[1] = get_unaligned_le64(key + 16);
+		l[2] = get_unaligned_le64(key + 24);
+		ctx->nrounds = SPECK128_256_NROUNDS;
+		for (i = 0; i < ctx->nrounds; i++) {
+			ctx->round_keys[i] = k;
+			speck128_round(&l[i % 3], &k, i);
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* Speck64 */
+
+#define SPECK64_BLOCK_SIZE	8
+
+#define SPECK64_96_KEY_SIZE	12
+#define SPECK64_96_NROUNDS	26
+
+#define SPECK64_128_KEY_SIZE	16
+#define SPECK64_128_NROUNDS	27
+
+struct speck64_tfm_ctx {
+	u32 round_keys[SPECK64_128_NROUNDS];
+	int nrounds;
+};
+
+static __always_inline void speck64_round(u32 *x, u32 *y, u32 k)
+{
+	*x = ror32(*x, 8);
+	*x += *y;
+	*x ^= k;
+	*y = rol32(*y, 3);
+	*y ^= *x;
+}
+
+static __always_inline void speck64_unround(u32 *x, u32 *y, u32 k)
+{
+	*y ^= *x;
+	*y = ror32(*y, 3);
+	*x ^= k;
+	*x -= *y;
+	*x = rol32(*x, 8);
+}
+
+static void speck64_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
+{
+	const struct speck64_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+	u32 y = get_unaligned_le32(in);
+	u32 x = get_unaligned_le32(in + 4);
+	int i;
+
+	for (i = 0; i < ctx->nrounds; i++)
+		speck64_round(&x, &y, ctx->round_keys[i]);
+
+	put_unaligned_le32(y, out);
+	put_unaligned_le32(x, out + 4);
+}
+
+static void speck64_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
+{
+	const struct speck64_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+	u32 y = get_unaligned_le32(in);
+	u32 x = get_unaligned_le32(in + 4);
+	int i;
+
+	for (i = ctx->nrounds - 1; i >= 0; i--)
+		speck64_unround(&x, &y, ctx->round_keys[i]);
+
+	put_unaligned_le32(y, out);
+	put_unaligned_le32(x, out + 4);
+}
+
+static int speck64_setkey(struct crypto_tfm *tfm, const u8 *key,
+			  unsigned int keylen)
+{
+	struct speck64_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+	u32 l[3];
+	u32 k;
+	int i;
+
+	switch (keylen) {
+	case SPECK64_96_KEY_SIZE:
+		k = get_unaligned_le32(key);
+		l[0] = get_unaligned_le32(key + 4);
+		l[1] = get_unaligned_le32(key + 8);
+		ctx->nrounds = SPECK64_96_NROUNDS;
+		for (i = 0; i < ctx->nrounds; i++) {
+			ctx->round_keys[i] = k;
+			speck64_round(&l[i % 2], &k, i);
+		}
+		break;
+	case SPECK64_128_KEY_SIZE:
+		k = get_unaligned_le32(key);
+		l[0] = get_unaligned_le32(key + 4);
+		l[1] = get_unaligned_le32(key + 8);
+		l[2] = get_unaligned_le32(key + 12);
+		ctx->nrounds = SPECK64_128_NROUNDS;
+		for (i = 0; i < ctx->nrounds; i++) {
+			ctx->round_keys[i] = k;
+			speck64_round(&l[i % 3], &k, i);
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* Algorithm definitions */
+
+static struct crypto_alg speck_algs[] = {
+	{
+		.cra_name		= "speck128",
+		.cra_driver_name	= "speck128-generic",
+		.cra_priority		= 100,
+		.cra_flags		= CRYPTO_ALG_TYPE_CIPHER,
+		.cra_blocksize		= SPECK128_BLOCK_SIZE,
+		.cra_ctxsize		= sizeof(struct speck128_tfm_ctx),
+		.cra_module		= THIS_MODULE,
+		.cra_u			= {
+			.cipher = {
+				.cia_min_keysize	= SPECK128_128_KEY_SIZE,
+				.cia_max_keysize	= SPECK128_256_KEY_SIZE,
+				.cia_setkey		= speck128_setkey,
+				.cia_encrypt		= speck128_encrypt,
+				.cia_decrypt		= speck128_decrypt
+			}
+		}
+	}, {
+		.cra_name		= "speck64",
+		.cra_driver_name	= "speck64-generic",
+		.cra_priority		= 100,
+		.cra_flags		= CRYPTO_ALG_TYPE_CIPHER,
+		.cra_blocksize		= SPECK64_BLOCK_SIZE,
+		.cra_ctxsize		= sizeof(struct speck64_tfm_ctx),
+		.cra_module		= THIS_MODULE,
+		.cra_u			= {
+			.cipher = {
+				.cia_min_keysize	= SPECK64_96_KEY_SIZE,
+				.cia_max_keysize	= SPECK64_128_KEY_SIZE,
+				.cia_setkey		= speck64_setkey,
+				.cia_encrypt		= speck64_encrypt,
+				.cia_decrypt		= speck64_decrypt
+			}
+		}
+	}
+};
+
+static int __init speck_module_init(void)
+{
+	return crypto_register_algs(speck_algs, ARRAY_SIZE(speck_algs));
+}
+
+static void __exit speck_module_exit(void)
+{
+	crypto_unregister_algs(speck_algs, ARRAY_SIZE(speck_algs));
+}
+
+module_init(speck_module_init);
+module_exit(speck_module_exit);
+
+MODULE_DESCRIPTION("Speck block cipher (generic)");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Eric Biggers <ebiggers@google.com>");
+MODULE_ALIAS_CRYPTO("speck128");
+MODULE_ALIAS_CRYPTO("speck128-generic");
+MODULE_ALIAS_CRYPTO("speck64");
+MODULE_ALIAS_CRYPTO("speck64-generic");
diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index d5e23a142a04..058ed5eb6620 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -3000,6 +3000,24 @@ static const struct alg_test_desc alg_test_descs[] = {
 				.dec = __VECS(serpent_dec_tv_template)
 			}
 		}
+	}, {
+		.alg = "ecb(speck128)",
+		.test = alg_test_skcipher,
+		.suite = {
+			.cipher = {
+				.enc = __VECS(speck128_enc_tv_template),
+				.dec = __VECS(speck128_dec_tv_template)
+			}
+		}
+	}, {
+		.alg = "ecb(speck64)",
+		.test = alg_test_skcipher,
+		.suite = {
+			.cipher = {
+				.enc = __VECS(speck64_enc_tv_template),
+				.dec = __VECS(speck64_dec_tv_template)
+			}
+		}
 	}, {
 		.alg = "ecb(tea)",
 		.test = alg_test_skcipher,
diff --git a/crypto/testmgr.h b/crypto/testmgr.h
index 6044f6906bd6..3818210f77cf 100644
--- a/crypto/testmgr.h
+++ b/crypto/testmgr.h
@@ -14323,6 +14323,134 @@ static const struct cipher_testvec serpent_xts_dec_tv_template[] = {
 	},
 };
 
+/*
+ * Speck test vectors taken from the original paper:
+ * "The Simon and Speck Families of Lightweight Block Ciphers"
+ * https://eprint.iacr.org/2013/404.pdf
+ *
+ * Note that the paper does not make byte and word order clear.  But it was
+ * confirmed with the authors that the intended orders are little endian byte
+ * order and (y, x) word order.  Equivalently, the printed test vectors, when
+ * looking at only the bytes (ignoring the whitespace that divides them into
+ * words), are backwards: the left-most byte is actually the one with the
+ * highest memory address, while the right-most byte is actually the one with
+ * the lowest memory address.
+ */
+
+static const struct cipher_testvec speck128_enc_tv_template[] = {
+	{ /* Speck128/128 */
+		.key	= "\x00\x01\x02\x03\x04\x05\x06\x07"
+			  "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+		.klen	= 16,
+		.input	= "\x20\x6d\x61\x64\x65\x20\x69\x74"
+			  "\x20\x65\x71\x75\x69\x76\x61\x6c",
+		.ilen	= 16,
+		.result	= "\x18\x0d\x57\x5c\xdf\xfe\x60\x78"
+			  "\x65\x32\x78\x79\x51\x98\x5d\xa6",
+		.rlen	= 16,
+	}, { /* Speck128/192 */
+		.key	= "\x00\x01\x02\x03\x04\x05\x06\x07"
+			  "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
+			  "\x10\x11\x12\x13\x14\x15\x16\x17",
+		.klen	= 24,
+		.input	= "\x65\x6e\x74\x20\x74\x6f\x20\x43"
+			  "\x68\x69\x65\x66\x20\x48\x61\x72",
+		.ilen	= 16,
+		.result	= "\x86\x18\x3c\xe0\x5d\x18\xbc\xf9"
+			  "\x66\x55\x13\x13\x3a\xcf\xe4\x1b",
+		.rlen	= 16,
+	}, { /* Speck128/256 */
+		.key	= "\x00\x01\x02\x03\x04\x05\x06\x07"
+			  "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
+			  "\x10\x11\x12\x13\x14\x15\x16\x17"
+			  "\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f",
+		.klen	= 32,
+		.input	= "\x70\x6f\x6f\x6e\x65\x72\x2e\x20"
+			  "\x49\x6e\x20\x74\x68\x6f\x73\x65",
+		.ilen	= 16,
+		.result	= "\x43\x8f\x18\x9c\x8d\xb4\xee\x4e"
+			  "\x3e\xf5\xc0\x05\x04\x01\x09\x41",
+		.rlen	= 16,
+	},
+};
+
+static const struct cipher_testvec speck128_dec_tv_template[] = {
+	{ /* Speck128/128 */
+		.key	= "\x00\x01\x02\x03\x04\x05\x06\x07"
+			  "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+		.klen	= 16,
+		.input	= "\x18\x0d\x57\x5c\xdf\xfe\x60\x78"
+			  "\x65\x32\x78\x79\x51\x98\x5d\xa6",
+		.ilen	= 16,
+		.result	= "\x20\x6d\x61\x64\x65\x20\x69\x74"
+			  "\x20\x65\x71\x75\x69\x76\x61\x6c",
+		.rlen	= 16,
+	}, { /* Speck128/192 */
+		.key	= "\x00\x01\x02\x03\x04\x05\x06\x07"
+			  "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
+			  "\x10\x11\x12\x13\x14\x15\x16\x17",
+		.klen	= 24,
+		.input	= "\x86\x18\x3c\xe0\x5d\x18\xbc\xf9"
+			  "\x66\x55\x13\x13\x3a\xcf\xe4\x1b",
+		.ilen	= 16,
+		.result	= "\x65\x6e\x74\x20\x74\x6f\x20\x43"
+			  "\x68\x69\x65\x66\x20\x48\x61\x72",
+		.rlen	= 16,
+	}, { /* Speck128/256 */
+		.key	= "\x00\x01\x02\x03\x04\x05\x06\x07"
+			  "\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
+			  "\x10\x11\x12\x13\x14\x15\x16\x17"
+			  "\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f",
+		.klen	= 32,
+		.input	= "\x43\x8f\x18\x9c\x8d\xb4\xee\x4e"
+			  "\x3e\xf5\xc0\x05\x04\x01\x09\x41",
+		.ilen	= 16,
+		.result	= "\x70\x6f\x6f\x6e\x65\x72\x2e\x20"
+			  "\x49\x6e\x20\x74\x68\x6f\x73\x65",
+		.rlen	= 16,
+	},
+};
+
+static const struct cipher_testvec speck64_enc_tv_template[] = {
+	{ /* Speck64/96 */
+		.key	= "\x00\x01\x02\x03\x08\x09\x0a\x0b"
+			  "\x10\x11\x12\x13",
+		.klen	= 12,
+		.input	= "\x65\x61\x6e\x73\x20\x46\x61\x74",
+		.ilen	= 8,
+		.result	= "\x6c\x94\x75\x41\xec\x52\x79\x9f",
+		.rlen	= 8,
+	}, { /* Speck64/128 */
+		.key	= "\x00\x01\x02\x03\x08\x09\x0a\x0b"
+			  "\x10\x11\x12\x13\x18\x19\x1a\x1b",
+		.klen	= 16,
+		.input	= "\x2d\x43\x75\x74\x74\x65\x72\x3b",
+		.ilen	= 8,
+		.result	= "\x8b\x02\x4e\x45\x48\xa5\x6f\x8c",
+		.rlen	= 8,
+	},
+};
+
+static const struct cipher_testvec speck64_dec_tv_template[] = {
+	{ /* Speck64/96 */
+		.key	= "\x00\x01\x02\x03\x08\x09\x0a\x0b"
+			  "\x10\x11\x12\x13",
+		.klen	= 12,
+		.input	= "\x6c\x94\x75\x41\xec\x52\x79\x9f",
+		.ilen	= 8,
+		.result	= "\x65\x61\x6e\x73\x20\x46\x61\x74",
+		.rlen	= 8,
+	}, { /* Speck64/128 */
+		.key	= "\x00\x01\x02\x03\x08\x09\x0a\x0b"
+			  "\x10\x11\x12\x13\x18\x19\x1a\x1b",
+		.klen	= 16,
+		.input	= "\x8b\x02\x4e\x45\x48\xa5\x6f\x8c",
+		.ilen	= 8,
+		.result	= "\x2d\x43\x75\x74\x74\x65\x72\x3b",
+		.rlen	= 8,
+	},
+};
+
 /* Cast6 test vectors from RFC 2612 */
 static const struct cipher_testvec cast6_enc_tv_template[] = {
 	{
