diff options
Diffstat (limited to 'arch/arm64/crypto/aes-modes.S')
| -rw-r--r-- | arch/arm64/crypto/aes-modes.S | 40 |
1 files changed, 21 insertions, 19 deletions
diff --git a/arch/arm64/crypto/aes-modes.S b/arch/arm64/crypto/aes-modes.S index 9697eda3b4d1..039738ae23f6 100644 --- a/arch/arm64/crypto/aes-modes.S +++ b/arch/arm64/crypto/aes-modes.S @@ -340,17 +340,19 @@ AES_ENDPROC(aes_ctr_encrypt) * int blocks, u8 const rk2[], u8 iv[], int first) */ - .macro next_tweak, out, in, const, tmp + .macro next_tweak, out, in, tmp sshr \tmp\().2d, \in\().2d, #63 - and \tmp\().16b, \tmp\().16b, \const\().16b + and \tmp\().16b, \tmp\().16b, xtsmask.16b add \out\().2d, \in\().2d, \in\().2d ext \tmp\().16b, \tmp\().16b, \tmp\().16b, #8 eor \out\().16b, \out\().16b, \tmp\().16b .endm -.Lxts_mul_x: -CPU_LE( .quad 1, 0x87 ) -CPU_BE( .quad 0x87, 1 ) + .macro xts_load_mask, tmp + movi xtsmask.2s, #0x1 + movi \tmp\().2s, #0x87 + uzp1 xtsmask.4s, xtsmask.4s, \tmp\().4s + .endm AES_ENTRY(aes_xts_encrypt) stp x29, x30, [sp, #-16]! @@ -362,24 +364,24 @@ AES_ENTRY(aes_xts_encrypt) enc_prepare w3, x5, x8 encrypt_block v4, w3, x5, x8, w7 /* first tweak */ enc_switch_key w3, x2, x8 - ldr q7, .Lxts_mul_x + xts_load_mask v8 b .LxtsencNx .Lxtsencnotfirst: enc_prepare w3, x2, x8 .LxtsencloopNx: - ldr q7, .Lxts_mul_x - next_tweak v4, v4, v7, v8 + xts_reload_mask v8 + next_tweak v4, v4, v8 .LxtsencNx: subs w4, w4, #4 bmi .Lxtsenc1x ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */ - next_tweak v5, v4, v7, v8 + next_tweak v5, v4, v8 eor v0.16b, v0.16b, v4.16b - next_tweak v6, v5, v7, v8 + next_tweak v6, v5, v8 eor v1.16b, v1.16b, v5.16b eor v2.16b, v2.16b, v6.16b - next_tweak v7, v6, v7, v8 + next_tweak v7, v6, v8 eor v3.16b, v3.16b, v7.16b bl aes_encrypt_block4x eor v3.16b, v3.16b, v7.16b @@ -401,7 +403,7 @@ AES_ENTRY(aes_xts_encrypt) st1 {v0.16b}, [x0], #16 subs w4, w4, #1 beq .Lxtsencout - next_tweak v4, v4, v7, v8 + next_tweak v4, v4, v8 b .Lxtsencloop .Lxtsencout: st1 {v4.16b}, [x6] @@ -420,24 +422,24 @@ AES_ENTRY(aes_xts_decrypt) enc_prepare w3, x5, x8 encrypt_block v4, w3, x5, x8, w7 /* first tweak */ dec_prepare w3, x2, x8 - ldr q7, .Lxts_mul_x + xts_load_mask v8 b .LxtsdecNx .Lxtsdecnotfirst: dec_prepare w3, x2, x8 .LxtsdecloopNx: - ldr q7, .Lxts_mul_x - next_tweak v4, v4, v7, v8 + xts_reload_mask v8 + next_tweak v4, v4, v8 .LxtsdecNx: subs w4, w4, #4 bmi .Lxtsdec1x ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */ - next_tweak v5, v4, v7, v8 + next_tweak v5, v4, v8 eor v0.16b, v0.16b, v4.16b - next_tweak v6, v5, v7, v8 + next_tweak v6, v5, v8 eor v1.16b, v1.16b, v5.16b eor v2.16b, v2.16b, v6.16b - next_tweak v7, v6, v7, v8 + next_tweak v7, v6, v8 eor v3.16b, v3.16b, v7.16b bl aes_decrypt_block4x eor v3.16b, v3.16b, v7.16b @@ -459,7 +461,7 @@ AES_ENTRY(aes_xts_decrypt) st1 {v0.16b}, [x0], #16 subs w4, w4, #1 beq .Lxtsdecout - next_tweak v4, v4, v7, v8 + next_tweak v4, v4, v8 b .Lxtsdecloop .Lxtsdecout: st1 {v4.16b}, [x6] |