[PATCH] crypto: vmx: Improved AES/XTS performance of 6-way unrolling for ppc.
Danny Tsen
dtsen at linux.ibm.com
Wed Aug 30 01:37:04 AEST 2023
Improve AES/XTS performance of 6-way unrolling for PowerPC up
to 17% with tcrypt. This is done by using one instruction,
vpermxor, to replace xor and vsldoi.
This patch has been tested with the kernel crypto module tcrypt.ko and
has passed the selftest. The patch is also tested with
CONFIG_CRYPTO_MANAGER_EXTRA_TESTS enabled.
Signed-off-by: Danny Tsen <dtsen at linux.ibm.com>
---
drivers/crypto/vmx/aesp8-ppc.pl | 141 +++++++++++++++++++++-----------
1 file changed, 92 insertions(+), 49 deletions(-)
diff --git a/drivers/crypto/vmx/aesp8-ppc.pl b/drivers/crypto/vmx/aesp8-ppc.pl
index 50a0a18f35da..f729589d792e 100644
--- a/drivers/crypto/vmx/aesp8-ppc.pl
+++ b/drivers/crypto/vmx/aesp8-ppc.pl
@@ -132,11 +132,12 @@ rcon:
.long 0x1b000000, 0x1b000000, 0x1b000000, 0x1b000000 ?rev
.long 0x0d0e0f0c, 0x0d0e0f0c, 0x0d0e0f0c, 0x0d0e0f0c ?rev
.long 0,0,0,0 ?asis
+.long 0x0f102132, 0x43546576, 0x8798a9ba, 0xcbdcedfe
Lconsts:
mflr r0
bcl 20,31,\$+4
mflr $ptr #vvvvv "distance between . and rcon
- addi $ptr,$ptr,-0x48
+ addi $ptr,$ptr,-0x58
mtlr r0
blr
.long 0
@@ -2495,6 +2496,17 @@ _aesp8_xts_encrypt6x:
li $x70,0x70
mtspr 256,r0
+ xxlor 2, 32+$eighty7, 32+$eighty7
+ vsldoi $eighty7,$tmp,$eighty7,1 # 0x010101..87
+ xxlor 1, 32+$eighty7, 32+$eighty7
+
+ # Load XOR Lconsts.
+ mr $x70, r6
+ bl Lconsts
+ lxvw4x 0, $x40, r6 # load XOR contents
+ mr r6, $x70
+ li $x70,0x70
+
subi $rounds,$rounds,3 # -4 in total
lvx $rndkey0,$x00,$key1 # load key schedule
@@ -2537,69 +2549,77 @@ Load_xts_enc_key:
?vperm v31,v31,$twk5,$keyperm
lvx v25,$x10,$key_ # pre-load round[2]
+ # Switch to use the following codes with 0x010101..87 to generate tweak.
+ # eighty7 = 0x010101..87
+ # vsrab tmp, tweak, seven # next tweak value, right shift 7 bits
+ # vand tmp, tmp, eighty7 # last byte with carry
+ # vaddubm tweak, tweak, tweak # left shift 1 bit (x2)
+ # xxlor vsx, 0, 0
+ # vpermxor tweak, tweak, tmp, vsx
+
vperm $in0,$inout,$inptail,$inpperm
subi $inp,$inp,31 # undo "caller"
vxor $twk0,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
vand $tmp,$tmp,$eighty7
vxor $out0,$in0,$twk0
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in1, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in1
lvx_u $in1,$x10,$inp
vxor $twk1,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
le?vperm $in1,$in1,$in1,$leperm
vand $tmp,$tmp,$eighty7
vxor $out1,$in1,$twk1
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in2, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in2
lvx_u $in2,$x20,$inp
andi. $taillen,$len,15
vxor $twk2,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
le?vperm $in2,$in2,$in2,$leperm
vand $tmp,$tmp,$eighty7
vxor $out2,$in2,$twk2
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in3, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in3
lvx_u $in3,$x30,$inp
sub $len,$len,$taillen
vxor $twk3,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
le?vperm $in3,$in3,$in3,$leperm
vand $tmp,$tmp,$eighty7
vxor $out3,$in3,$twk3
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in4, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in4
lvx_u $in4,$x40,$inp
subi $len,$len,0x60
vxor $twk4,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
le?vperm $in4,$in4,$in4,$leperm
vand $tmp,$tmp,$eighty7
vxor $out4,$in4,$twk4
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in5, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in5
lvx_u $in5,$x50,$inp
addi $inp,$inp,0x60
vxor $twk5,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
le?vperm $in5,$in5,$in5,$leperm
vand $tmp,$tmp,$eighty7
vxor $out5,$in5,$twk5
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in0, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in0
vxor v31,v31,$rndkey0
mtctr $rounds
@@ -2625,6 +2645,8 @@ Loop_xts_enc6x:
lvx v25,$x10,$key_ # round[4]
bdnz Loop_xts_enc6x
+ xxlor 32+$eighty7, 1, 1 # 0x010101..87
+
subic $len,$len,96 # $len-=96
vxor $in0,$twk0,v31 # xor with last round key
vcipher $out0,$out0,v24
@@ -2634,7 +2656,6 @@ Loop_xts_enc6x:
vaddubm $tweak,$tweak,$tweak
vcipher $out2,$out2,v24
vcipher $out3,$out3,v24
- vsldoi $tmp,$tmp,$tmp,15
vcipher $out4,$out4,v24
vcipher $out5,$out5,v24
@@ -2642,7 +2663,8 @@ Loop_xts_enc6x:
vand $tmp,$tmp,$eighty7
vcipher $out0,$out0,v25
vcipher $out1,$out1,v25
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in1, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in1
vcipher $out2,$out2,v25
vcipher $out3,$out3,v25
vxor $in1,$twk1,v31
@@ -2653,13 +2675,13 @@ Loop_xts_enc6x:
and r0,r0,$len
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
vcipher $out0,$out0,v26
vcipher $out1,$out1,v26
vand $tmp,$tmp,$eighty7
vcipher $out2,$out2,v26
vcipher $out3,$out3,v26
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in2, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in2
vcipher $out4,$out4,v26
vcipher $out5,$out5,v26
@@ -2673,7 +2695,6 @@ Loop_xts_enc6x:
vaddubm $tweak,$tweak,$tweak
vcipher $out0,$out0,v27
vcipher $out1,$out1,v27
- vsldoi $tmp,$tmp,$tmp,15
vcipher $out2,$out2,v27
vcipher $out3,$out3,v27
vand $tmp,$tmp,$eighty7
@@ -2681,7 +2702,8 @@ Loop_xts_enc6x:
vcipher $out5,$out5,v27
addi $key_,$sp,$FRAME+15 # rewind $key_
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in3, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in3
vcipher $out0,$out0,v28
vcipher $out1,$out1,v28
vxor $in3,$twk3,v31
@@ -2690,7 +2712,6 @@ Loop_xts_enc6x:
vcipher $out2,$out2,v28
vcipher $out3,$out3,v28
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
vcipher $out4,$out4,v28
vcipher $out5,$out5,v28
lvx v24,$x00,$key_ # re-pre-load round[1]
@@ -2698,7 +2719,8 @@ Loop_xts_enc6x:
vcipher $out0,$out0,v29
vcipher $out1,$out1,v29
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in4, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in4
vcipher $out2,$out2,v29
vcipher $out3,$out3,v29
vxor $in4,$twk4,v31
@@ -2708,14 +2730,14 @@ Loop_xts_enc6x:
vcipher $out5,$out5,v29
lvx v25,$x10,$key_ # re-pre-load round[2]
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
vcipher $out0,$out0,v30
vcipher $out1,$out1,v30
vand $tmp,$tmp,$eighty7
vcipher $out2,$out2,v30
vcipher $out3,$out3,v30
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in5, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in5
vcipher $out4,$out4,v30
vcipher $out5,$out5,v30
vxor $in5,$twk5,v31
@@ -2725,7 +2747,6 @@ Loop_xts_enc6x:
vcipherlast $out0,$out0,$in0
lvx_u $in0,$x00,$inp # load next input block
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
vcipherlast $out1,$out1,$in1
lvx_u $in1,$x10,$inp
vcipherlast $out2,$out2,$in2
@@ -2738,7 +2759,10 @@ Loop_xts_enc6x:
vcipherlast $out4,$out4,$in4
le?vperm $in2,$in2,$in2,$leperm
lvx_u $in4,$x40,$inp
- vxor $tweak,$tweak,$tmp
+ xxlor 10, 32+$in0, 32+$in0
+ xxlor 32+$in0, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in0
+ xxlor 32+$in0, 10, 10
vcipherlast $tmp,$out5,$in5 # last block might be needed
# in stealing mode
le?vperm $in3,$in3,$in3,$leperm
@@ -2771,6 +2795,8 @@ Loop_xts_enc6x:
mtctr $rounds
beq Loop_xts_enc6x # did $len-=96 borrow?
+ xxlor 32+$eighty7, 2, 2 # 0x010101..87
+
addic. $len,$len,0x60
beq Lxts_enc6x_zero
cmpwi $len,0x20
@@ -3147,6 +3173,17 @@ _aesp8_xts_decrypt6x:
li $x70,0x70
mtspr 256,r0
+ xxlor 2, 32+$eighty7, 32+$eighty7
+ vsldoi $eighty7,$tmp,$eighty7,1 # 0x010101..87
+ xxlor 1, 32+$eighty7, 32+$eighty7
+
+ # Load XOR Lconsts.
+ mr $x70, r6
+ bl Lconsts
+ lxvw4x 0, $x40, r6 # load XOR contents
+ mr r6, $x70
+ li $x70,0x70
+
subi $rounds,$rounds,3 # -4 in total
lvx $rndkey0,$x00,$key1 # load key schedule
@@ -3194,64 +3231,64 @@ Load_xts_dec_key:
vxor $twk0,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
vand $tmp,$tmp,$eighty7
vxor $out0,$in0,$twk0
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in1, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in1
lvx_u $in1,$x10,$inp
vxor $twk1,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
le?vperm $in1,$in1,$in1,$leperm
vand $tmp,$tmp,$eighty7
vxor $out1,$in1,$twk1
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in2, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in2
lvx_u $in2,$x20,$inp
andi. $taillen,$len,15
vxor $twk2,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
le?vperm $in2,$in2,$in2,$leperm
vand $tmp,$tmp,$eighty7
vxor $out2,$in2,$twk2
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in3, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in3
lvx_u $in3,$x30,$inp
sub $len,$len,$taillen
vxor $twk3,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
le?vperm $in3,$in3,$in3,$leperm
vand $tmp,$tmp,$eighty7
vxor $out3,$in3,$twk3
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in4, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in4
lvx_u $in4,$x40,$inp
subi $len,$len,0x60
vxor $twk4,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
le?vperm $in4,$in4,$in4,$leperm
vand $tmp,$tmp,$eighty7
vxor $out4,$in4,$twk4
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in5, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in5
lvx_u $in5,$x50,$inp
addi $inp,$inp,0x60
vxor $twk5,$tweak,$rndkey0
vsrab $tmp,$tweak,$seven # next tweak value
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
le?vperm $in5,$in5,$in5,$leperm
vand $tmp,$tmp,$eighty7
vxor $out5,$in5,$twk5
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in0, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in0
vxor v31,v31,$rndkey0
mtctr $rounds
@@ -3277,6 +3314,8 @@ Loop_xts_dec6x:
lvx v25,$x10,$key_ # round[4]
bdnz Loop_xts_dec6x
+ xxlor 32+$eighty7, 1, 1 # 0x010101..87
+
subic $len,$len,96 # $len-=96
vxor $in0,$twk0,v31 # xor with last round key
vncipher $out0,$out0,v24
@@ -3286,7 +3325,6 @@ Loop_xts_dec6x:
vaddubm $tweak,$tweak,$tweak
vncipher $out2,$out2,v24
vncipher $out3,$out3,v24
- vsldoi $tmp,$tmp,$tmp,15
vncipher $out4,$out4,v24
vncipher $out5,$out5,v24
@@ -3294,7 +3332,8 @@ Loop_xts_dec6x:
vand $tmp,$tmp,$eighty7
vncipher $out0,$out0,v25
vncipher $out1,$out1,v25
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in1, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in1
vncipher $out2,$out2,v25
vncipher $out3,$out3,v25
vxor $in1,$twk1,v31
@@ -3305,13 +3344,13 @@ Loop_xts_dec6x:
and r0,r0,$len
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
vncipher $out0,$out0,v26
vncipher $out1,$out1,v26
vand $tmp,$tmp,$eighty7
vncipher $out2,$out2,v26
vncipher $out3,$out3,v26
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in2, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in2
vncipher $out4,$out4,v26
vncipher $out5,$out5,v26
@@ -3325,7 +3364,6 @@ Loop_xts_dec6x:
vaddubm $tweak,$tweak,$tweak
vncipher $out0,$out0,v27
vncipher $out1,$out1,v27
- vsldoi $tmp,$tmp,$tmp,15
vncipher $out2,$out2,v27
vncipher $out3,$out3,v27
vand $tmp,$tmp,$eighty7
@@ -3333,7 +3371,8 @@ Loop_xts_dec6x:
vncipher $out5,$out5,v27
addi $key_,$sp,$FRAME+15 # rewind $key_
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in3, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in3
vncipher $out0,$out0,v28
vncipher $out1,$out1,v28
vxor $in3,$twk3,v31
@@ -3342,7 +3381,6 @@ Loop_xts_dec6x:
vncipher $out2,$out2,v28
vncipher $out3,$out3,v28
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
vncipher $out4,$out4,v28
vncipher $out5,$out5,v28
lvx v24,$x00,$key_ # re-pre-load round[1]
@@ -3350,7 +3388,8 @@ Loop_xts_dec6x:
vncipher $out0,$out0,v29
vncipher $out1,$out1,v29
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in4, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in4
vncipher $out2,$out2,v29
vncipher $out3,$out3,v29
vxor $in4,$twk4,v31
@@ -3360,14 +3399,14 @@ Loop_xts_dec6x:
vncipher $out5,$out5,v29
lvx v25,$x10,$key_ # re-pre-load round[2]
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
vncipher $out0,$out0,v30
vncipher $out1,$out1,v30
vand $tmp,$tmp,$eighty7
vncipher $out2,$out2,v30
vncipher $out3,$out3,v30
- vxor $tweak,$tweak,$tmp
+ xxlor 32+$in5, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in5
vncipher $out4,$out4,v30
vncipher $out5,$out5,v30
vxor $in5,$twk5,v31
@@ -3377,7 +3416,6 @@ Loop_xts_dec6x:
vncipherlast $out0,$out0,$in0
lvx_u $in0,$x00,$inp # load next input block
vaddubm $tweak,$tweak,$tweak
- vsldoi $tmp,$tmp,$tmp,15
vncipherlast $out1,$out1,$in1
lvx_u $in1,$x10,$inp
vncipherlast $out2,$out2,$in2
@@ -3390,7 +3428,10 @@ Loop_xts_dec6x:
vncipherlast $out4,$out4,$in4
le?vperm $in2,$in2,$in2,$leperm
lvx_u $in4,$x40,$inp
- vxor $tweak,$tweak,$tmp
+ xxlor 10, 32+$in0, 32+$in0
+ xxlor 32+$in0, 0, 0
+ vpermxor $tweak, $tweak, $tmp, $in0
+ xxlor 32+$in0, 10, 10
vncipherlast $out5,$out5,$in5
le?vperm $in3,$in3,$in3,$leperm
lvx_u $in5,$x50,$inp
@@ -3421,6 +3462,8 @@ Loop_xts_dec6x:
mtctr $rounds
beq Loop_xts_dec6x # did $len-=96 borrow?
+ xxlor 32+$eighty7, 2, 2 # 0x010101..87
+
addic. $len,$len,0x60
beq Lxts_dec6x_zero
cmpwi $len,0x20
--
2.31.1
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