Signed-off-by: Ard Biesheuvel <a...@kernel.org>
---
arch/arm64/crypto/aes-glue.c | 21 +++++---
arch/arm64/crypto/aes-modes.S | 52 +++++++-------------
2 files changed, 33 insertions(+), 40 deletions(-)
diff --git a/arch/arm64/crypto/aes-glue.c b/arch/arm64/crypto/aes-glue.c
index e7f116d833b9..17e735931a0c 100644
--- a/arch/arm64/crypto/aes-glue.c
+++ b/arch/arm64/crypto/aes-glue.c
@@ -105,9 +105,9 @@ asmlinkage void aes_essiv_cbc_decrypt(u8 out[], u8 const
in[], u32 const rk1[],
int rounds, int blocks, u8 iv[],
u32 const rk2[]);
-asmlinkage void aes_mac_update(u8 const in[], u32 const rk[], int rounds,
- int blocks, u8 dg[], int enc_before,
- int enc_after);
+asmlinkage int aes_mac_update(u8 const in[], u32 const rk[], int rounds,
+ int blocks, u8 dg[], int enc_before,
+ int enc_after);
struct crypto_aes_xts_ctx {
struct crypto_aes_ctx key1;
@@ -856,10 +856,17 @@ static void mac_do_update(struct crypto_aes_ctx *ctx, u8
const in[], int blocks,
int rounds = 6 + ctx->key_length / 4;
if (crypto_simd_usable()) {
- kernel_neon_begin();
- aes_mac_update(in, ctx->key_enc, rounds, blocks, dg, enc_before,
- enc_after);
- kernel_neon_end();
+ int rem;
+
+ do {
+ kernel_neon_begin();
+ rem = aes_mac_update(in, ctx->key_enc, rounds, blocks,
+ dg, enc_before, enc_after);
+ kernel_neon_end();
+ in += (blocks - rem) * AES_BLOCK_SIZE;
+ blocks = rem;
+ enc_before = 0;
+ } while (blocks);
} else {
if (enc_before)
aes_encrypt(ctx, dg, dg);
diff --git a/arch/arm64/crypto/aes-modes.S b/arch/arm64/crypto/aes-modes.S
index 3d1f97799899..bbdb54702aa7 100644
--- a/arch/arm64/crypto/aes-modes.S
+++ b/arch/arm64/crypto/aes-modes.S
@@ -678,61 +678,47 @@ AES_FUNC_END(aes_xts_decrypt)
* int blocks, u8 dg[], int enc_before, int enc_after)
*/
AES_FUNC_START(aes_mac_update)
- frame_push 6
-
- mov x19, x0
- mov x20, x1
- mov x21, x2
- mov x22, x3
- mov x23, x4
- mov x24, x6
-
- ld1 {v0.16b}, [x23] /* get dg */
+ ld1 {v0.16b}, [x4] /* get dg */
enc_prepare w2, x1, x7
cbz w5, .Lmacloop4x
encrypt_block v0, w2, x1, x7, w8
.Lmacloop4x:
- subs w22, w22, #4
+ subs w3, w3, #4
bmi .Lmac1x
- ld1 {v1.16b-v4.16b}, [x19], #64 /* get next pt block */
+ ld1 {v1.16b-v4.16b}, [x0], #64 /* get next pt block */
eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */
- encrypt_block v0, w21, x20, x7, w8
+ encrypt_block v0, w2, x1, x7, w8
eor v0.16b, v0.16b, v2.16b
- encrypt_block v0, w21, x20, x7, w8
+ encrypt_block v0, w2, x1, x7, w8
eor v0.16b, v0.16b, v3.16b
- encrypt_block v0, w21, x20, x7, w8
+ encrypt_block v0, w2, x1, x7, w8
eor v0.16b, v0.16b, v4.16b
- cmp w22, wzr
- csinv x5, x24, xzr, eq
+ cmp w3, wzr
+ csinv x5, x6, xzr, eq
cbz w5, .Lmacout
- encrypt_block v0, w21, x20, x7, w8
- st1 {v0.16b}, [x23] /* return dg */
- cond_yield_neon .Lmacrestart
+ encrypt_block v0, w2, x1, x7, w8
+ st1 {v0.16b}, [x4] /* return dg */
+ cond_yield .Lmacout, x7
b .Lmacloop4x
.Lmac1x:
- add w22, w22, #4
+ add w3, w3, #4
.Lmacloop:
- cbz w22, .Lmacout
- ld1 {v1.16b}, [x19], #16 /* get next pt block */
+ cbz w3, .Lmacout
+ ld1 {v1.16b}, [x0], #16 /* get next pt block */
eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */
- subs w22, w22, #1
- csinv x5, x24, xzr, eq
+ subs w3, w3, #1
+ csinv x5, x6, xzr, eq
cbz w5, .Lmacout
.Lmacenc:
- encrypt_block v0, w21, x20, x7, w8
+ encrypt_block v0, w2, x1, x7, w8
b .Lmacloop
.Lmacout:
- st1 {v0.16b}, [x23] /* return dg */
- frame_pop
+ st1 {v0.16b}, [x4] /* return dg */
+ mov w0, w3
ret
-
-.Lmacrestart:
- ld1 {v0.16b}, [x23] /* get dg */
- enc_prepare w21, x20, x0
- b .Lmacloop4x
AES_FUNC_END(aes_mac_update)
--
2.29.2
