[PATCH 12/12] x86/crypto: aesni: Add scatter/gather avx stubs, and use them in C
From: Dave Watson
Date: Mon Dec 10 2018 - 15:00:26 EST
Add the appropriate scatter/gather stubs to the avx asm.
In the C code, we can now always use crypt_by_sg, since both
sse and asm code now support scatter/gather.
Introduce a new struct, aesni_gcm_tfm, that is initialized on
startup to point to either the SSE, AVX, or AVX2 versions of the
four necessary encryption/decryption routines.
GENX_OPTSIZE is still checked at the start of crypt_by_sg. The
total size of the data is checked, since the additional overhead
is in the init function, calculating additional HashKeys.
Signed-off-by: Dave Watson <davejwatson@xxxxxx>
---
arch/x86/crypto/aesni-intel_avx-x86_64.S | 181 ++++++------
arch/x86/crypto/aesni-intel_glue.c | 349 +++++++----------------
2 files changed, 198 insertions(+), 332 deletions(-)
diff --git a/arch/x86/crypto/aesni-intel_avx-x86_64.S b/arch/x86/crypto/aesni-intel_avx-x86_64.S
index af45fc57db90..91c039ab5699 100644
--- a/arch/x86/crypto/aesni-intel_avx-x86_64.S
+++ b/arch/x86/crypto/aesni-intel_avx-x86_64.S
@@ -518,14 +518,13 @@ _less_than_8_bytes_left\@:
#############################
_multiple_of_16_bytes\@:
- GCM_COMPLETE \GHASH_MUL \REP
.endm
# GCM_COMPLETE Finishes update of tag of last partial block
# Output: Authorization Tag (AUTH_TAG)
# Clobbers rax, r10-r12, and xmm0, xmm1, xmm5-xmm15
-.macro GCM_COMPLETE GHASH_MUL REP
+.macro GCM_COMPLETE GHASH_MUL REP AUTH_TAG AUTH_TAG_LEN
vmovdqu AadHash(arg2), %xmm14
vmovdqu HashKey(arg2), %xmm13
@@ -560,8 +559,8 @@ _partial_done\@:
_return_T\@:
- mov arg9, %r10 # r10 = authTag
- mov arg10, %r11 # r11 = auth_tag_len
+ mov \AUTH_TAG, %r10 # r10 = authTag
+ mov \AUTH_TAG_LEN, %r11 # r11 = auth_tag_len
cmp $16, %r11
je _T_16\@
@@ -680,14 +679,14 @@ _get_AAD_done\@:
mov %r11, PBlockLen(arg2) # ctx_data.partial_block_length = 0
mov %r11, PBlockEncKey(arg2) # ctx_data.partial_block_enc_key = 0
- mov arg4, %rax
+ mov arg3, %rax
movdqu (%rax), %xmm0
movdqu %xmm0, OrigIV(arg2) # ctx_data.orig_IV = iv
vpshufb SHUF_MASK(%rip), %xmm0, %xmm0
movdqu %xmm0, CurCount(arg2) # ctx_data.current_counter = iv
- vmovdqu (arg3), %xmm6 # xmm6 = HashKey
+ vmovdqu (arg4), %xmm6 # xmm6 = HashKey
vpshufb SHUF_MASK(%rip), %xmm6, %xmm6
############### PRECOMPUTATION of HashKey<<1 mod poly from the HashKey
@@ -1776,88 +1775,100 @@ _initial_blocks_done\@:
# const u8 *aad, /* Additional Authentication Data (AAD)*/
# u64 aad_len) /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
#############################################################
-ENTRY(aesni_gcm_precomp_avx_gen2)
+ENTRY(aesni_gcm_init_avx_gen2)
FUNC_SAVE
INIT GHASH_MUL_AVX, PRECOMPUTE_AVX
FUNC_RESTORE
ret
-ENDPROC(aesni_gcm_precomp_avx_gen2)
+ENDPROC(aesni_gcm_init_avx_gen2)
###############################################################################
-#void aesni_gcm_enc_avx_gen2(
+#void aesni_gcm_enc_update_avx_gen2(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# gcm_context_data *data,
# u8 *out, /* Ciphertext output. Encrypt in-place is allowed. */
# const u8 *in, /* Plaintext input */
-# u64 plaintext_len, /* Length of data in Bytes for encryption. */
-# u8 *iv, /* Pre-counter block j0: 4 byte salt
-# (from Security Association) concatenated with 8 byte
-# Initialisation Vector (from IPSec ESP Payload)
-# concatenated with 0x00000001. 16-byte aligned pointer. */
-# const u8 *aad, /* Additional Authentication Data (AAD)*/
-# u64 aad_len, /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
-# u8 *auth_tag, /* Authenticated Tag output. */
-# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
-# Valid values are 16 (most likely), 12 or 8. */
+# u64 plaintext_len) /* Length of data in Bytes for encryption. */
###############################################################################
-ENTRY(aesni_gcm_enc_avx_gen2)
+ENTRY(aesni_gcm_enc_update_avx_gen2)
FUNC_SAVE
mov keysize, %eax
cmp $32, %eax
- je key_256_enc
+ je key_256_enc_update
cmp $16, %eax
- je key_128_enc
+ je key_128_enc_update
# must be 192
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, ENC, 11
FUNC_RESTORE
ret
-key_128_enc:
+key_128_enc_update:
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, ENC, 9
FUNC_RESTORE
ret
-key_256_enc:
+key_256_enc_update:
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, ENC, 13
FUNC_RESTORE
ret
-ENDPROC(aesni_gcm_enc_avx_gen2)
+ENDPROC(aesni_gcm_enc_update_avx_gen2)
###############################################################################
-#void aesni_gcm_dec_avx_gen2(
+#void aesni_gcm_dec_update_avx_gen2(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# gcm_context_data *data,
# u8 *out, /* Plaintext output. Decrypt in-place is allowed. */
# const u8 *in, /* Ciphertext input */
-# u64 plaintext_len, /* Length of data in Bytes for encryption. */
-# u8 *iv, /* Pre-counter block j0: 4 byte salt
-# (from Security Association) concatenated with 8 byte
-# Initialisation Vector (from IPSec ESP Payload)
-# concatenated with 0x00000001. 16-byte aligned pointer. */
-# const u8 *aad, /* Additional Authentication Data (AAD)*/
-# u64 aad_len, /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
-# u8 *auth_tag, /* Authenticated Tag output. */
-# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
-# Valid values are 16 (most likely), 12 or 8. */
+# u64 plaintext_len) /* Length of data in Bytes for encryption. */
###############################################################################
-ENTRY(aesni_gcm_dec_avx_gen2)
+ENTRY(aesni_gcm_dec_update_avx_gen2)
FUNC_SAVE
mov keysize,%eax
cmp $32, %eax
- je key_256_dec
+ je key_256_dec_update
cmp $16, %eax
- je key_128_dec
+ je key_128_dec_update
# must be 192
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, DEC, 11
FUNC_RESTORE
ret
-key_128_dec:
+key_128_dec_update:
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, DEC, 9
FUNC_RESTORE
ret
-key_256_dec:
+key_256_dec_update:
GCM_ENC_DEC INITIAL_BLOCKS_AVX, GHASH_8_ENCRYPT_8_PARALLEL_AVX, GHASH_LAST_8_AVX, GHASH_MUL_AVX, DEC, 13
FUNC_RESTORE
ret
-ENDPROC(aesni_gcm_dec_avx_gen2)
+ENDPROC(aesni_gcm_dec_update_avx_gen2)
+
+###############################################################################
+#void aesni_gcm_finalize_avx_gen2(
+# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
+# gcm_context_data *data,
+# u8 *auth_tag, /* Authenticated Tag output. */
+# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
+# Valid values are 16 (most likely), 12 or 8. */
+###############################################################################
+ENTRY(aesni_gcm_finalize_avx_gen2)
+ FUNC_SAVE
+ mov keysize,%eax
+ cmp $32, %eax
+ je key_256_finalize
+ cmp $16, %eax
+ je key_128_finalize
+ # must be 192
+ GCM_COMPLETE GHASH_MUL_AVX, 11, arg3, arg4
+ FUNC_RESTORE
+ ret
+key_128_finalize:
+ GCM_COMPLETE GHASH_MUL_AVX, 9, arg3, arg4
+ FUNC_RESTORE
+ ret
+key_256_finalize:
+ GCM_COMPLETE GHASH_MUL_AVX, 13, arg3, arg4
+ FUNC_RESTORE
+ ret
+ENDPROC(aesni_gcm_finalize_avx_gen2)
+
#endif /* CONFIG_AS_AVX */
#ifdef CONFIG_AS_AVX2
@@ -2724,24 +2735,23 @@ _initial_blocks_done\@:
#############################################################
-#void aesni_gcm_precomp_avx_gen4
+#void aesni_gcm_init_avx_gen4
# (gcm_data *my_ctx_data,
# gcm_context_data *data,
-# u8 *hash_subkey# /* H, the Hash sub key input. Data starts on a 16-byte boundary. */
# u8 *iv, /* Pre-counter block j0: 4 byte salt
# (from Security Association) concatenated with 8 byte
# Initialisation Vector (from IPSec ESP Payload)
# concatenated with 0x00000001. 16-byte aligned pointer. */
+# u8 *hash_subkey# /* H, the Hash sub key input. Data starts on a 16-byte boundary. */
# const u8 *aad, /* Additional Authentication Data (AAD)*/
# u64 aad_len) /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
#############################################################
-ENTRY(aesni_gcm_precomp_avx_gen4)
+ENTRY(aesni_gcm_init_avx_gen4)
FUNC_SAVE
INIT GHASH_MUL_AVX2, PRECOMPUTE_AVX2
FUNC_RESTORE
ret
-ENDPROC(aesni_gcm_precomp_avx_gen4)
-
+ENDPROC(aesni_gcm_init_avx_gen4)
###############################################################################
#void aesni_gcm_enc_avx_gen4(
@@ -2749,74 +2759,85 @@ ENDPROC(aesni_gcm_precomp_avx_gen4)
# gcm_context_data *data,
# u8 *out, /* Ciphertext output. Encrypt in-place is allowed. */
# const u8 *in, /* Plaintext input */
-# u64 plaintext_len, /* Length of data in Bytes for encryption. */
-# u8 *iv, /* Pre-counter block j0: 4 byte salt
-# (from Security Association) concatenated with 8 byte
-# Initialisation Vector (from IPSec ESP Payload)
-# concatenated with 0x00000001. 16-byte aligned pointer. */
-# const u8 *aad, /* Additional Authentication Data (AAD)*/
-# u64 aad_len, /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
-# u8 *auth_tag, /* Authenticated Tag output. */
-# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
-# Valid values are 16 (most likely), 12 or 8. */
+# u64 plaintext_len) /* Length of data in Bytes for encryption. */
###############################################################################
-ENTRY(aesni_gcm_enc_avx_gen4)
+ENTRY(aesni_gcm_enc_update_avx_gen4)
FUNC_SAVE
mov keysize,%eax
cmp $32, %eax
- je key_256_enc4
+ je key_256_enc_update4
cmp $16, %eax
- je key_128_enc4
+ je key_128_enc_update4
# must be 192
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, ENC, 11
FUNC_RESTORE
ret
-key_128_enc4:
+key_128_enc_update4:
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, ENC, 9
FUNC_RESTORE
ret
-key_256_enc4:
+key_256_enc_update4:
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, ENC, 13
FUNC_RESTORE
ret
-ENDPROC(aesni_gcm_enc_avx_gen4)
+ENDPROC(aesni_gcm_enc_update_avx_gen4)
###############################################################################
-#void aesni_gcm_dec_avx_gen4(
+#void aesni_gcm_dec_update_avx_gen4(
# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
# gcm_context_data *data,
# u8 *out, /* Plaintext output. Decrypt in-place is allowed. */
# const u8 *in, /* Ciphertext input */
-# u64 plaintext_len, /* Length of data in Bytes for encryption. */
-# u8 *iv, /* Pre-counter block j0: 4 byte salt
-# (from Security Association) concatenated with 8 byte
-# Initialisation Vector (from IPSec ESP Payload)
-# concatenated with 0x00000001. 16-byte aligned pointer. */
-# const u8 *aad, /* Additional Authentication Data (AAD)*/
-# u64 aad_len, /* Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 Bytes */
-# u8 *auth_tag, /* Authenticated Tag output. */
-# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
-# Valid values are 16 (most likely), 12 or 8. */
+# u64 plaintext_len) /* Length of data in Bytes for encryption. */
###############################################################################
-ENTRY(aesni_gcm_dec_avx_gen4)
+ENTRY(aesni_gcm_dec_update_avx_gen4)
FUNC_SAVE
mov keysize,%eax
cmp $32, %eax
- je key_256_dec4
+ je key_256_dec_update4
cmp $16, %eax
- je key_128_dec4
+ je key_128_dec_update4
# must be 192
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, DEC, 11
FUNC_RESTORE
ret
-key_128_dec4:
+key_128_dec_update4:
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, DEC, 9
FUNC_RESTORE
ret
-key_256_dec4:
+key_256_dec_update4:
GCM_ENC_DEC INITIAL_BLOCKS_AVX2, GHASH_8_ENCRYPT_8_PARALLEL_AVX2, GHASH_LAST_8_AVX2, GHASH_MUL_AVX2, DEC, 13
FUNC_RESTORE
ret
-ENDPROC(aesni_gcm_dec_avx_gen4)
+ENDPROC(aesni_gcm_dec_update_avx_gen4)
+
+###############################################################################
+#void aesni_gcm_finalize_avx_gen4(
+# gcm_data *my_ctx_data, /* aligned to 16 Bytes */
+# gcm_context_data *data,
+# u8 *auth_tag, /* Authenticated Tag output. */
+# u64 auth_tag_len)# /* Authenticated Tag Length in bytes.
+# Valid values are 16 (most likely), 12 or 8. */
+###############################################################################
+ENTRY(aesni_gcm_finalize_avx_gen4)
+ FUNC_SAVE
+ mov keysize,%eax
+ cmp $32, %eax
+ je key_256_finalize4
+ cmp $16, %eax
+ je key_128_finalize4
+ # must be 192
+ GCM_COMPLETE GHASH_MUL_AVX2, 11, arg3, arg4
+ FUNC_RESTORE
+ ret
+key_128_finalize4:
+ GCM_COMPLETE GHASH_MUL_AVX2, 9, arg3, arg4
+ FUNC_RESTORE
+ ret
+key_256_finalize4:
+ GCM_COMPLETE GHASH_MUL_AVX2, 13, arg3, arg4
+ FUNC_RESTORE
+ ret
+ENDPROC(aesni_gcm_finalize_avx_gen4)
#endif /* CONFIG_AS_AVX2 */
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index 2648842f1c3f..1321700d6647 100644
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -175,6 +175,32 @@ asmlinkage void aesni_gcm_finalize(void *ctx,
struct gcm_context_data *gdata,
u8 *auth_tag, unsigned long auth_tag_len);
+static struct aesni_gcm_tfm_s {
+void (*init)(void *ctx,
+ struct gcm_context_data *gdata,
+ u8 *iv,
+ u8 *hash_subkey, const u8 *aad,
+ unsigned long aad_len);
+void (*enc_update)(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in,
+ unsigned long plaintext_len);
+void (*dec_update)(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in,
+ unsigned long ciphertext_len);
+void (*finalize)(void *ctx,
+ struct gcm_context_data *gdata,
+ u8 *auth_tag, unsigned long auth_tag_len);
+} *aesni_gcm_tfm;
+
+struct aesni_gcm_tfm_s aesni_gcm_tfm_sse = {
+ .init = &aesni_gcm_init,
+ .enc_update = &aesni_gcm_enc_update,
+ .dec_update = &aesni_gcm_dec_update,
+ .finalize = &aesni_gcm_finalize,
+};
+
#ifdef CONFIG_AS_AVX
asmlinkage void aes_ctr_enc_128_avx_by8(const u8 *in, u8 *iv,
void *keys, u8 *out, unsigned int num_bytes);
@@ -183,16 +209,27 @@ asmlinkage void aes_ctr_enc_192_avx_by8(const u8 *in, u8 *iv,
asmlinkage void aes_ctr_enc_256_avx_by8(const u8 *in, u8 *iv,
void *keys, u8 *out, unsigned int num_bytes);
/*
- * asmlinkage void aesni_gcm_precomp_avx_gen2()
+ * asmlinkage void aesni_gcm_init_avx_gen2()
* gcm_data *my_ctx_data, context data
* u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
*/
-asmlinkage void aesni_gcm_precomp_avx_gen2(void *my_ctx_data,
- struct gcm_context_data *gdata,
- u8 *hash_subkey,
- u8 *iv,
- const u8 *aad,
- unsigned long aad_len);
+asmlinkage void aesni_gcm_init_avx_gen2(void *my_ctx_data,
+ struct gcm_context_data *gdata,
+ u8 *iv,
+ u8 *hash_subkey,
+ const u8 *aad,
+ unsigned long aad_len);
+
+asmlinkage void aesni_gcm_enc_update_avx_gen2(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in, unsigned long plaintext_len);
+asmlinkage void aesni_gcm_dec_update_avx_gen2(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in,
+ unsigned long ciphertext_len);
+asmlinkage void aesni_gcm_finalize_avx_gen2(void *ctx,
+ struct gcm_context_data *gdata,
+ u8 *auth_tag, unsigned long auth_tag_len);
asmlinkage void aesni_gcm_enc_avx_gen2(void *ctx,
struct gcm_context_data *gdata, u8 *out,
@@ -206,55 +243,38 @@ asmlinkage void aesni_gcm_dec_avx_gen2(void *ctx,
const u8 *aad, unsigned long aad_len,
u8 *auth_tag, unsigned long auth_tag_len);
-static void aesni_gcm_enc_avx(void *ctx,
- struct gcm_context_data *data, u8 *out,
- const u8 *in, unsigned long plaintext_len, u8 *iv,
- u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
- u8 *auth_tag, unsigned long auth_tag_len)
-{
- if (plaintext_len < AVX_GEN2_OPTSIZE) {
- aesni_gcm_enc(ctx, data, out, in,
- plaintext_len, iv, hash_subkey, aad,
- aad_len, auth_tag, auth_tag_len);
- } else {
- aesni_gcm_precomp_avx_gen2(ctx, data, hash_subkey, iv,
- aad, aad_len);
- aesni_gcm_enc_avx_gen2(ctx, data, out, in, plaintext_len, iv,
- aad, aad_len, auth_tag, auth_tag_len);
- }
-}
+struct aesni_gcm_tfm_s aesni_gcm_tfm_avx_gen2 = {
+ .init = &aesni_gcm_init_avx_gen2,
+ .enc_update = &aesni_gcm_enc_update_avx_gen2,
+ .dec_update = &aesni_gcm_dec_update_avx_gen2,
+ .finalize = &aesni_gcm_finalize_avx_gen2,
+};
-static void aesni_gcm_dec_avx(void *ctx,
- struct gcm_context_data *data, u8 *out,
- const u8 *in, unsigned long ciphertext_len, u8 *iv,
- u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
- u8 *auth_tag, unsigned long auth_tag_len)
-{
- if (ciphertext_len < AVX_GEN2_OPTSIZE) {
- aesni_gcm_dec(ctx, data, out, in,
- ciphertext_len, iv, hash_subkey, aad,
- aad_len, auth_tag, auth_tag_len);
- } else {
- aesni_gcm_precomp_avx_gen2(ctx, data, hash_subkey, iv,
- aad, aad_len);
- aesni_gcm_dec_avx_gen2(ctx, data, out, in, ciphertext_len, iv,
- aad, aad_len, auth_tag, auth_tag_len);
- }
-}
#endif
#ifdef CONFIG_AS_AVX2
/*
- * asmlinkage void aesni_gcm_precomp_avx_gen4()
+ * asmlinkage void aesni_gcm_init_avx_gen4()
* gcm_data *my_ctx_data, context data
* u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
*/
-asmlinkage void aesni_gcm_precomp_avx_gen4(void *my_ctx_data,
- struct gcm_context_data *gdata,
- u8 *hash_subkey,
- u8 *iv,
- const u8 *aad,
- unsigned long aad_len);
+asmlinkage void aesni_gcm_init_avx_gen4(void *my_ctx_data,
+ struct gcm_context_data *gdata,
+ u8 *iv,
+ u8 *hash_subkey,
+ const u8 *aad,
+ unsigned long aad_len);
+
+asmlinkage void aesni_gcm_enc_update_avx_gen4(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in, unsigned long plaintext_len);
+asmlinkage void aesni_gcm_dec_update_avx_gen4(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in,
+ unsigned long ciphertext_len);
+asmlinkage void aesni_gcm_finalize_avx_gen4(void *ctx,
+ struct gcm_context_data *gdata,
+ u8 *auth_tag, unsigned long auth_tag_len);
asmlinkage void aesni_gcm_enc_avx_gen4(void *ctx,
struct gcm_context_data *gdata, u8 *out,
@@ -268,67 +288,15 @@ asmlinkage void aesni_gcm_dec_avx_gen4(void *ctx,
const u8 *aad, unsigned long aad_len,
u8 *auth_tag, unsigned long auth_tag_len);
-static void aesni_gcm_enc_avx2(void *ctx,
- struct gcm_context_data *data, u8 *out,
- const u8 *in, unsigned long plaintext_len, u8 *iv,
- u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
- u8 *auth_tag, unsigned long auth_tag_len)
-{
- if (plaintext_len < AVX_GEN2_OPTSIZE) {
- aesni_gcm_enc(ctx, data, out, in,
- plaintext_len, iv, hash_subkey, aad,
- aad_len, auth_tag, auth_tag_len);
- } else if (plaintext_len < AVX_GEN4_OPTSIZE) {
- aesni_gcm_precomp_avx_gen2(ctx, data, hash_subkey, iv,
- aad, aad_len);
- aesni_gcm_enc_avx_gen2(ctx, data, out, in, plaintext_len, iv,
- aad, aad_len, auth_tag, auth_tag_len);
- } else {
- aesni_gcm_precomp_avx_gen4(ctx, data, hash_subkey, iv,
- aad, aad_len);
- aesni_gcm_enc_avx_gen4(ctx, data, out, in, plaintext_len, iv,
- aad, aad_len, auth_tag, auth_tag_len);
- }
-}
+struct aesni_gcm_tfm_s aesni_gcm_tfm_avx_gen4 = {
+ .init = &aesni_gcm_init_avx_gen4,
+ .enc_update = &aesni_gcm_enc_update_avx_gen4,
+ .dec_update = &aesni_gcm_dec_update_avx_gen4,
+ .finalize = &aesni_gcm_finalize_avx_gen4,
+};
-static void aesni_gcm_dec_avx2(void *ctx,
- struct gcm_context_data *data, u8 *out,
- const u8 *in, unsigned long ciphertext_len, u8 *iv,
- u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
- u8 *auth_tag, unsigned long auth_tag_len)
-{
- if (ciphertext_len < AVX_GEN2_OPTSIZE) {
- aesni_gcm_dec(ctx, data, out, in,
- ciphertext_len, iv, hash_subkey,
- aad, aad_len, auth_tag, auth_tag_len);
- } else if (ciphertext_len < AVX_GEN4_OPTSIZE) {
- aesni_gcm_precomp_avx_gen2(ctx, data, hash_subkey, iv,
- aad, aad_len);
- aesni_gcm_dec_avx_gen2(ctx, data, out, in, ciphertext_len, iv,
- aad, aad_len, auth_tag, auth_tag_len);
- } else {
- aesni_gcm_precomp_avx_gen4(ctx, data, hash_subkey, iv,
- aad, aad_len);
- aesni_gcm_dec_avx_gen4(ctx, data, out, in, ciphertext_len, iv,
- aad, aad_len, auth_tag, auth_tag_len);
- }
-}
#endif
-static void (*aesni_gcm_enc_tfm)(void *ctx,
- struct gcm_context_data *data, u8 *out,
- const u8 *in, unsigned long plaintext_len,
- u8 *iv, u8 *hash_subkey, const u8 *aad,
- unsigned long aad_len, u8 *auth_tag,
- unsigned long auth_tag_len);
-
-static void (*aesni_gcm_dec_tfm)(void *ctx,
- struct gcm_context_data *data, u8 *out,
- const u8 *in, unsigned long ciphertext_len,
- u8 *iv, u8 *hash_subkey, const u8 *aad,
- unsigned long aad_len, u8 *auth_tag,
- unsigned long auth_tag_len);
-
static inline struct
aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm)
{
@@ -810,6 +778,7 @@ static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req,
{
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
unsigned long auth_tag_len = crypto_aead_authsize(tfm);
+ struct aesni_gcm_tfm_s *gcm_tfm = aesni_gcm_tfm;
struct gcm_context_data data AESNI_ALIGN_ATTR;
struct scatter_walk dst_sg_walk = {};
unsigned long left = req->cryptlen;
@@ -827,6 +796,15 @@ static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req,
if (!enc)
left -= auth_tag_len;
+#ifdef CONFIG_AS_AVX2
+ if (left < AVX_GEN4_OPTSIZE && gcm_tfm == &aesni_gcm_tfm_avx_gen4)
+ gcm_tfm = &aesni_gcm_tfm_avx_gen2;
+#endif
+#ifdef CONFIG_AS_AVX
+ if (left < AVX_GEN2_OPTSIZE && gcm_tfm == &aesni_gcm_tfm_avx_gen2)
+ gcm_tfm = &aesni_gcm_tfm_sse;
+#endif
+
/* Linearize assoc, if not already linear */
if (req->src->length >= assoclen && req->src->length &&
(!PageHighMem(sg_page(req->src)) ||
@@ -851,7 +829,7 @@ static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req,
}
kernel_fpu_begin();
- aesni_gcm_init(aes_ctx, &data, iv,
+ gcm_tfm->init(aes_ctx, &data, iv,
hash_subkey, assoc, assoclen);
if (req->src != req->dst) {
while (left) {
@@ -862,10 +840,10 @@ static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req,
len = min(srclen, dstlen);
if (len) {
if (enc)
- aesni_gcm_enc_update(aes_ctx, &data,
+ gcm_tfm->enc_update(aes_ctx, &data,
dst, src, len);
else
- aesni_gcm_dec_update(aes_ctx, &data,
+ gcm_tfm->dec_update(aes_ctx, &data,
dst, src, len);
}
left -= len;
@@ -883,10 +861,10 @@ static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req,
len = scatterwalk_clamp(&src_sg_walk, left);
if (len) {
if (enc)
- aesni_gcm_enc_update(aes_ctx, &data,
+ gcm_tfm->enc_update(aes_ctx, &data,
src, src, len);
else
- aesni_gcm_dec_update(aes_ctx, &data,
+ gcm_tfm->dec_update(aes_ctx, &data,
src, src, len);
}
left -= len;
@@ -895,7 +873,7 @@ static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req,
scatterwalk_done(&src_sg_walk, 1, left);
}
}
- aesni_gcm_finalize(aes_ctx, &data, authTag, auth_tag_len);
+ gcm_tfm->finalize(aes_ctx, &data, authTag, auth_tag_len);
kernel_fpu_end();
if (!assocmem)
@@ -928,145 +906,15 @@ static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req,
static int gcmaes_encrypt(struct aead_request *req, unsigned int assoclen,
u8 *hash_subkey, u8 *iv, void *aes_ctx)
{
- u8 one_entry_in_sg = 0;
- u8 *src, *dst, *assoc;
- struct crypto_aead *tfm = crypto_aead_reqtfm(req);
- unsigned long auth_tag_len = crypto_aead_authsize(tfm);
- struct scatter_walk src_sg_walk;
- struct scatter_walk dst_sg_walk = {};
- struct gcm_context_data data AESNI_ALIGN_ATTR;
-
- if (aesni_gcm_enc_tfm == aesni_gcm_enc ||
- req->cryptlen < AVX_GEN2_OPTSIZE) {
- return gcmaes_crypt_by_sg(true, req, assoclen, hash_subkey, iv,
- aes_ctx);
- }
- if (sg_is_last(req->src) &&
- (!PageHighMem(sg_page(req->src)) ||
- req->src->offset + req->src->length <= PAGE_SIZE) &&
- sg_is_last(req->dst) &&
- (!PageHighMem(sg_page(req->dst)) ||
- req->dst->offset + req->dst->length <= PAGE_SIZE)) {
- one_entry_in_sg = 1;
- scatterwalk_start(&src_sg_walk, req->src);
- assoc = scatterwalk_map(&src_sg_walk);
- src = assoc + req->assoclen;
- dst = src;
- if (unlikely(req->src != req->dst)) {
- scatterwalk_start(&dst_sg_walk, req->dst);
- dst = scatterwalk_map(&dst_sg_walk) + req->assoclen;
- }
- } else {
- /* Allocate memory for src, dst, assoc */
- assoc = kmalloc(req->cryptlen + auth_tag_len + req->assoclen,
- GFP_ATOMIC);
- if (unlikely(!assoc))
- return -ENOMEM;
- scatterwalk_map_and_copy(assoc, req->src, 0,
- req->assoclen + req->cryptlen, 0);
- src = assoc + req->assoclen;
- dst = src;
- }
-
- kernel_fpu_begin();
- aesni_gcm_enc_tfm(aes_ctx, &data, dst, src, req->cryptlen, iv,
- hash_subkey, assoc, assoclen,
- dst + req->cryptlen, auth_tag_len);
- kernel_fpu_end();
-
- /* The authTag (aka the Integrity Check Value) needs to be written
- * back to the packet. */
- if (one_entry_in_sg) {
- if (unlikely(req->src != req->dst)) {
- scatterwalk_unmap(dst - req->assoclen);
- scatterwalk_advance(&dst_sg_walk, req->dst->length);
- scatterwalk_done(&dst_sg_walk, 1, 0);
- }
- scatterwalk_unmap(assoc);
- scatterwalk_advance(&src_sg_walk, req->src->length);
- scatterwalk_done(&src_sg_walk, req->src == req->dst, 0);
- } else {
- scatterwalk_map_and_copy(dst, req->dst, req->assoclen,
- req->cryptlen + auth_tag_len, 1);
- kfree(assoc);
- }
- return 0;
+ return gcmaes_crypt_by_sg(true, req, assoclen, hash_subkey, iv,
+ aes_ctx);
}
static int gcmaes_decrypt(struct aead_request *req, unsigned int assoclen,
u8 *hash_subkey, u8 *iv, void *aes_ctx)
{
- u8 one_entry_in_sg = 0;
- u8 *src, *dst, *assoc;
- unsigned long tempCipherLen = 0;
- struct crypto_aead *tfm = crypto_aead_reqtfm(req);
- unsigned long auth_tag_len = crypto_aead_authsize(tfm);
- u8 authTag[16];
- struct scatter_walk src_sg_walk;
- struct scatter_walk dst_sg_walk = {};
- struct gcm_context_data data AESNI_ALIGN_ATTR;
- int retval = 0;
-
- if (aesni_gcm_enc_tfm == aesni_gcm_enc ||
- req->cryptlen < AVX_GEN2_OPTSIZE) {
- return gcmaes_crypt_by_sg(false, req, assoclen, hash_subkey, iv,
- aes_ctx);
- }
- tempCipherLen = (unsigned long)(req->cryptlen - auth_tag_len);
-
- if (sg_is_last(req->src) &&
- (!PageHighMem(sg_page(req->src)) ||
- req->src->offset + req->src->length <= PAGE_SIZE) &&
- sg_is_last(req->dst) && req->dst->length &&
- (!PageHighMem(sg_page(req->dst)) ||
- req->dst->offset + req->dst->length <= PAGE_SIZE)) {
- one_entry_in_sg = 1;
- scatterwalk_start(&src_sg_walk, req->src);
- assoc = scatterwalk_map(&src_sg_walk);
- src = assoc + req->assoclen;
- dst = src;
- if (unlikely(req->src != req->dst)) {
- scatterwalk_start(&dst_sg_walk, req->dst);
- dst = scatterwalk_map(&dst_sg_walk) + req->assoclen;
- }
- } else {
- /* Allocate memory for src, dst, assoc */
- assoc = kmalloc(req->cryptlen + req->assoclen, GFP_ATOMIC);
- if (!assoc)
- return -ENOMEM;
- scatterwalk_map_and_copy(assoc, req->src, 0,
- req->assoclen + req->cryptlen, 0);
- src = assoc + req->assoclen;
- dst = src;
- }
-
-
- kernel_fpu_begin();
- aesni_gcm_dec_tfm(aes_ctx, &data, dst, src, tempCipherLen, iv,
- hash_subkey, assoc, assoclen,
- authTag, auth_tag_len);
- kernel_fpu_end();
-
- /* Compare generated tag with passed in tag. */
- retval = crypto_memneq(src + tempCipherLen, authTag, auth_tag_len) ?
- -EBADMSG : 0;
-
- if (one_entry_in_sg) {
- if (unlikely(req->src != req->dst)) {
- scatterwalk_unmap(dst - req->assoclen);
- scatterwalk_advance(&dst_sg_walk, req->dst->length);
- scatterwalk_done(&dst_sg_walk, 1, 0);
- }
- scatterwalk_unmap(assoc);
- scatterwalk_advance(&src_sg_walk, req->src->length);
- scatterwalk_done(&src_sg_walk, req->src == req->dst, 0);
- } else {
- scatterwalk_map_and_copy(dst, req->dst, req->assoclen,
- tempCipherLen, 1);
- kfree(assoc);
- }
- return retval;
-
+ return gcmaes_crypt_by_sg(false, req, assoclen, hash_subkey, iv,
+ aes_ctx);
}
static int helper_rfc4106_encrypt(struct aead_request *req)
@@ -1434,21 +1282,18 @@ static int __init aesni_init(void)
#ifdef CONFIG_AS_AVX2
if (boot_cpu_has(X86_FEATURE_AVX2)) {
pr_info("AVX2 version of gcm_enc/dec engaged.\n");
- aesni_gcm_enc_tfm = aesni_gcm_enc_avx2;
- aesni_gcm_dec_tfm = aesni_gcm_dec_avx2;
+ aesni_gcm_tfm = &aesni_gcm_tfm_avx_gen4;
} else
#endif
#ifdef CONFIG_AS_AVX
if (boot_cpu_has(X86_FEATURE_AVX)) {
pr_info("AVX version of gcm_enc/dec engaged.\n");
- aesni_gcm_enc_tfm = aesni_gcm_enc_avx;
- aesni_gcm_dec_tfm = aesni_gcm_dec_avx;
+ aesni_gcm_tfm = &aesni_gcm_tfm_avx_gen2;
} else
#endif
{
pr_info("SSE version of gcm_enc/dec engaged.\n");
- aesni_gcm_enc_tfm = aesni_gcm_enc;
- aesni_gcm_dec_tfm = aesni_gcm_dec;
+ aesni_gcm_tfm = &aesni_gcm_tfm_sse;
}
aesni_ctr_enc_tfm = aesni_ctr_enc;
#ifdef CONFIG_AS_AVX
--
2.17.1