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crypto: aesni - Merge INITIAL_BLOCKS_ENC/DEC 

Use macro operations to merge implemetations of INITIAL_BLOCKS,
since they differ by only a small handful of lines.

Use macro counter \@ to simplify implementation.

Signed-off-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Dave Watson 2018-02-14 09:38:12 -08:00 committed by Herbert Xu
parent 8c48db9a63
commit e1fd316fba
1 changed files with 48 additions and 250 deletions
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298
arch/x86/crypto/aesni-intel_asm.S
View File

@ -276,234 +276,7 @@ _done_read_partial_block_\@:
*/
.macro INITIAL_BLOCKS_DEC num_initial_blocks TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \
XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
MOVADQ SHUF_MASK(%rip), %xmm14
mov arg7, %r10 # %r10 = AAD
mov arg8, %r11 # %r11 = aadLen
pxor %xmm\i, %xmm\i
pxor \XMM2, \XMM2
cmp $16, %r11
jl _get_AAD_rest\num_initial_blocks\operation
_get_AAD_blocks\num_initial_blocks\operation:
movdqu (%r10), %xmm\i
PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
pxor %xmm\i, \XMM2
GHASH_MUL \XMM2, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
add $16, %r10
sub $16, %r11
cmp $16, %r11
jge _get_AAD_blocks\num_initial_blocks\operation
movdqu \XMM2, %xmm\i
/* read the last <16B of AAD */
_get_AAD_rest\num_initial_blocks\operation:
cmp $0, %r11
je _get_AAD_done\num_initial_blocks\operation
READ_PARTIAL_BLOCK %r10, %r11, \TMP1, %xmm\i
PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
pxor \XMM2, %xmm\i
GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
_get_AAD_done\num_initial_blocks\operation:
xor %r11, %r11 # initialise the data pointer offset as zero
# start AES for num_initial_blocks blocks
mov %arg5, %rax # %rax = *Y0
movdqu (%rax), \XMM0 # XMM0 = Y0
PSHUFB_XMM %xmm14, \XMM0
.if (\i == 5) || (\i == 6) || (\i == 7)
MOVADQ ONE(%RIP),\TMP1
MOVADQ (%arg1),\TMP2
.irpc index, \i_seq
paddd \TMP1, \XMM0 # INCR Y0
movdqa \XMM0, %xmm\index
PSHUFB_XMM %xmm14, %xmm\index # perform a 16 byte swap
pxor \TMP2, %xmm\index
.endr
lea 0x10(%arg1),%r10
mov keysize,%eax
shr $2,%eax # 128->4, 192->6, 256->8
add $5,%eax # 128->9, 192->11, 256->13
aes_loop_initial_dec\num_initial_blocks:
MOVADQ (%r10),\TMP1
.irpc index, \i_seq
AESENC \TMP1, %xmm\index
.endr
add $16,%r10
sub $1,%eax
jnz aes_loop_initial_dec\num_initial_blocks
MOVADQ (%r10), \TMP1
.irpc index, \i_seq
AESENCLAST \TMP1, %xmm\index # Last Round
.endr
.irpc index, \i_seq
movdqu (%arg3 , %r11, 1), \TMP1
pxor \TMP1, %xmm\index
movdqu %xmm\index, (%arg2 , %r11, 1)
# write back plaintext/ciphertext for num_initial_blocks
add $16, %r11
movdqa \TMP1, %xmm\index
PSHUFB_XMM %xmm14, %xmm\index
# prepare plaintext/ciphertext for GHASH computation
.endr
.endif
# apply GHASH on num_initial_blocks blocks
.if \i == 5
pxor %xmm5, %xmm6
GHASH_MUL %xmm6, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
pxor %xmm6, %xmm7
GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
pxor %xmm7, %xmm8
GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
.elseif \i == 6
pxor %xmm6, %xmm7
GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
pxor %xmm7, %xmm8
GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
.elseif \i == 7
pxor %xmm7, %xmm8
GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
.endif
cmp $64, %r13
jl _initial_blocks_done\num_initial_blocks\operation
# no need for precomputed values
/*
*
* Precomputations for HashKey parallel with encryption of first 4 blocks.
* Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
*/
MOVADQ ONE(%rip), \TMP1
paddd \TMP1, \XMM0 # INCR Y0
MOVADQ \XMM0, \XMM1
PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
paddd \TMP1, \XMM0 # INCR Y0
MOVADQ \XMM0, \XMM2
PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
paddd \TMP1, \XMM0 # INCR Y0
MOVADQ \XMM0, \XMM3
PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
paddd \TMP1, \XMM0 # INCR Y0
MOVADQ \XMM0, \XMM4
PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
MOVADQ 0(%arg1),\TMP1
pxor \TMP1, \XMM1
pxor \TMP1, \XMM2
pxor \TMP1, \XMM3
pxor \TMP1, \XMM4
movdqa \TMP3, \TMP5
pshufd $78, \TMP3, \TMP1
pxor \TMP3, \TMP1
movdqa \TMP1, HashKey_k(%rsp)
GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
# TMP5 = HashKey^2<<1 (mod poly)
movdqa \TMP5, HashKey_2(%rsp)
# HashKey_2 = HashKey^2<<1 (mod poly)
pshufd $78, \TMP5, \TMP1
pxor \TMP5, \TMP1
movdqa \TMP1, HashKey_2_k(%rsp)
.irpc index, 1234 # do 4 rounds
movaps 0x10*\index(%arg1), \TMP1
AESENC \TMP1, \XMM1
AESENC \TMP1, \XMM2
AESENC \TMP1, \XMM3
AESENC \TMP1, \XMM4
.endr
GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
# TMP5 = HashKey^3<<1 (mod poly)
movdqa \TMP5, HashKey_3(%rsp)
pshufd $78, \TMP5, \TMP1
pxor \TMP5, \TMP1
movdqa \TMP1, HashKey_3_k(%rsp)
.irpc index, 56789 # do next 5 rounds
movaps 0x10*\index(%arg1), \TMP1
AESENC \TMP1, \XMM1
AESENC \TMP1, \XMM2
AESENC \TMP1, \XMM3
AESENC \TMP1, \XMM4
.endr
GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
# TMP5 = HashKey^3<<1 (mod poly)
movdqa \TMP5, HashKey_4(%rsp)
pshufd $78, \TMP5, \TMP1
pxor \TMP5, \TMP1
movdqa \TMP1, HashKey_4_k(%rsp)
lea 0xa0(%arg1),%r10
mov keysize,%eax
shr $2,%eax # 128->4, 192->6, 256->8
sub $4,%eax # 128->0, 192->2, 256->4
jz aes_loop_pre_dec_done\num_initial_blocks
aes_loop_pre_dec\num_initial_blocks:
MOVADQ (%r10),\TMP2
.irpc index, 1234
AESENC \TMP2, %xmm\index
.endr
add $16,%r10
sub $1,%eax
jnz aes_loop_pre_dec\num_initial_blocks
aes_loop_pre_dec_done\num_initial_blocks:
MOVADQ (%r10), \TMP2
AESENCLAST \TMP2, \XMM1
AESENCLAST \TMP2, \XMM2
AESENCLAST \TMP2, \XMM3
AESENCLAST \TMP2, \XMM4
movdqu 16*0(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM1
movdqu \XMM1, 16*0(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM1
movdqu 16*1(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM2
movdqu \XMM2, 16*1(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM2
movdqu 16*2(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM3
movdqu \XMM3, 16*2(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM3
movdqu 16*3(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM4
movdqu \XMM4, 16*3(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM4
add $64, %r11
PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
pxor \XMMDst, \XMM1
# combine GHASHed value with the corresponding ciphertext
PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
_initial_blocks_done\num_initial_blocks\operation:
.endm
/*
* if a = number of total plaintext bytes
* b = floor(a/16)
* num_initial_blocks = b mod 4
* encrypt the initial num_initial_blocks blocks and apply ghash on
* the ciphertext
* %r10, %r11, %r12, %rax, %xmm5, %xmm6, %xmm7, %xmm8, %xmm9 registers
* are clobbered
* arg1, %arg2, %arg3, %r14 are used as a pointer only, not modified
*/
.macro INITIAL_BLOCKS_ENC num_initial_blocks TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \
.macro INITIAL_BLOCKS_ENC_DEC TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \
XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
MOVADQ SHUF_MASK(%rip), %xmm14
mov arg7, %r10 # %r10 = AAD
@ -512,8 +285,8 @@ XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
pxor \XMM2, \XMM2
cmp $16, %r11
jl _get_AAD_rest\num_initial_blocks\operation
_get_AAD_blocks\num_initial_blocks\operation:
jl _get_AAD_rest\@
_get_AAD_blocks\@:
movdqu (%r10), %xmm\i
PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
pxor %xmm\i, \XMM2
@ -521,21 +294,21 @@ _get_AAD_blocks\num_initial_blocks\operation:
add $16, %r10
sub $16, %r11
cmp $16, %r11
jge _get_AAD_blocks\num_initial_blocks\operation
jge _get_AAD_blocks\@
movdqu \XMM2, %xmm\i
/* read the last <16B of AAD */
_get_AAD_rest\num_initial_blocks\operation:
_get_AAD_rest\@:
cmp $0, %r11
je _get_AAD_done\num_initial_blocks\operation
je _get_AAD_done\@
READ_PARTIAL_BLOCK %r10, %r11, \TMP1, %xmm\i
PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
pxor \XMM2, %xmm\i
GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
_get_AAD_done\num_initial_blocks\operation:
_get_AAD_done\@:
xor %r11, %r11 # initialise the data pointer offset as zero
# start AES for num_initial_blocks blocks
@ -549,7 +322,11 @@ _get_AAD_done\num_initial_blocks\operation:
MOVADQ 0(%arg1),\TMP2
.irpc index, \i_seq
paddd \TMP1, \XMM0 # INCR Y0
.ifc \operation, dec
movdqa \XMM0, %xmm\index
.else
MOVADQ \XMM0, %xmm\index
.endif
PSHUFB_XMM %xmm14, %xmm\index # perform a 16 byte swap
pxor \TMP2, %xmm\index
.endr
@ -558,14 +335,14 @@ _get_AAD_done\num_initial_blocks\operation:
shr $2,%eax # 128->4, 192->6, 256->8
add $5,%eax # 128->9, 192->11, 256->13
aes_loop_initial_enc\num_initial_blocks:
aes_loop_initial_\@:
MOVADQ (%r10),\TMP1
.irpc index, \i_seq
AESENC \TMP1, %xmm\index
.endr
add $16,%r10
sub $1,%eax
jnz aes_loop_initial_enc\num_initial_blocks
jnz aes_loop_initial_\@
MOVADQ (%r10), \TMP1
.irpc index, \i_seq
@ -577,6 +354,10 @@ aes_loop_initial_enc\num_initial_blocks:
movdqu %xmm\index, (%arg2 , %r11, 1)
# write back plaintext/ciphertext for num_initial_blocks
add $16, %r11
.ifc \operation, dec
movdqa \TMP1, %xmm\index
.endif
PSHUFB_XMM %xmm14, %xmm\index
# prepare plaintext/ciphertext for GHASH computation
@ -602,7 +383,7 @@ aes_loop_initial_enc\num_initial_blocks:
GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
.endif
cmp $64, %r13
jl _initial_blocks_done\num_initial_blocks\operation
jl _initial_blocks_done\@
# no need for precomputed values
/*
*
@ -672,18 +453,18 @@ aes_loop_initial_enc\num_initial_blocks:
mov keysize,%eax
shr $2,%eax # 128->4, 192->6, 256->8
sub $4,%eax # 128->0, 192->2, 256->4
jz aes_loop_pre_enc_done\num_initial_blocks
jz aes_loop_pre_done\@
aes_loop_pre_enc\num_initial_blocks:
aes_loop_pre_\@:
MOVADQ (%r10),\TMP2
.irpc index, 1234
AESENC \TMP2, %xmm\index
.endr
add $16,%r10
sub $1,%eax
jnz aes_loop_pre_enc\num_initial_blocks
jnz aes_loop_pre_\@
aes_loop_pre_enc_done\num_initial_blocks:
aes_loop_pre_done\@:
MOVADQ (%r10), \TMP2
AESENCLAST \TMP2, \XMM1
AESENCLAST \TMP2, \XMM2
@ -691,16 +472,33 @@ aes_loop_pre_enc_done\num_initial_blocks:
AESENCLAST \TMP2, \XMM4
movdqu 16*0(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM1
.ifc \operation, dec
movdqu \XMM1, 16*0(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM1
.endif
movdqu 16*1(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM2
.ifc \operation, dec
movdqu \XMM2, 16*1(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM2
.endif
movdqu 16*2(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM3
.ifc \operation, dec
movdqu \XMM3, 16*2(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM3
.endif
movdqu 16*3(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM4
.ifc \operation, dec
movdqu \XMM4, 16*3(%arg2 , %r11 , 1)
movdqa \TMP1, \XMM4
.else
movdqu \XMM1, 16*0(%arg2 , %r11 , 1)
movdqu \XMM2, 16*1(%arg2 , %r11 , 1)
movdqu \XMM3, 16*2(%arg2 , %r11 , 1)
movdqu \XMM4, 16*3(%arg2 , %r11 , 1)
.endif
add $64, %r11
PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
@ -710,7 +508,7 @@ aes_loop_pre_enc_done\num_initial_blocks:
PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
_initial_blocks_done\num_initial_blocks\operation:
_initial_blocks_done\@:
.endm
@ -1379,22 +1177,22 @@ ENTRY(aesni_gcm_dec)
jb _initial_num_blocks_is_1_decrypt
je _initial_num_blocks_is_2_decrypt
_initial_num_blocks_is_3_decrypt:
INITIAL_BLOCKS_DEC 3, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 5, 678, dec
sub $48, %r13
jmp _initial_blocks_decrypted
_initial_num_blocks_is_2_decrypt:
INITIAL_BLOCKS_DEC 2, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 6, 78, dec
sub $32, %r13
jmp _initial_blocks_decrypted
_initial_num_blocks_is_1_decrypt:
INITIAL_BLOCKS_DEC 1, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 7, 8, dec
sub $16, %r13
jmp _initial_blocks_decrypted
_initial_num_blocks_is_0_decrypt:
INITIAL_BLOCKS_DEC 0, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 8, 0, dec
_initial_blocks_decrypted:
cmp $0, %r13
@ -1641,22 +1439,22 @@ ENTRY(aesni_gcm_enc)
jb _initial_num_blocks_is_1_encrypt
je _initial_num_blocks_is_2_encrypt
_initial_num_blocks_is_3_encrypt:
INITIAL_BLOCKS_ENC 3, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 5, 678, enc
sub $48, %r13
jmp _initial_blocks_encrypted
_initial_num_blocks_is_2_encrypt:
INITIAL_BLOCKS_ENC 2, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 6, 78, enc
sub $32, %r13
jmp _initial_blocks_encrypted
_initial_num_blocks_is_1_encrypt:
INITIAL_BLOCKS_ENC 1, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 7, 8, enc
sub $16, %r13
jmp _initial_blocks_encrypted
_initial_num_blocks_is_0_encrypt:
INITIAL_BLOCKS_ENC 0, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 8, 0, enc
_initial_blocks_encrypted: