Extends the x86_64 Poly1305 authenticator by a function processing four
consecutive Poly1305 blocks in parallel using AVX2 instructions.
For large messages, throughput increases by ~15-45% compared to two
block SSE2:
testing speed of poly1305 (poly1305-simd)
test 0 ( 96 byte blocks, 16 bytes per update, 6 updates): 3809514 opers/sec, 365713411 bytes/sec
test 1 ( 96 byte blocks, 32 bytes per update, 3 updates): 5973423 opers/sec, 573448627 bytes/sec
test 2 ( 96 byte blocks, 96 bytes per update, 1 updates): 9446779 opers/sec, 906890803 bytes/sec
test 3 ( 288 byte blocks, 16 bytes per update, 18 updates): 1364814 opers/sec, 393066691 bytes/sec
test 4 ( 288 byte blocks, 32 bytes per update, 9 updates): 2045780 opers/sec, 589184697 bytes/sec
test 5 ( 288 byte blocks, 288 bytes per update, 1 updates): 3711946 opers/sec, 1069040592 bytes/sec
test 6 ( 1056 byte blocks, 32 bytes per update, 33 updates): 573686 opers/sec, 605812732 bytes/sec
test 7 ( 1056 byte blocks, 1056 bytes per update, 1 updates): 1647802 opers/sec, 1740079440 bytes/sec
test 8 ( 2080 byte blocks, 32 bytes per update, 65 updates): 292970 opers/sec, 609378224 bytes/sec
test 9 ( 2080 byte blocks, 2080 bytes per update, 1 updates): 943229 opers/sec, 1961916528 bytes/sec
test 10 ( 4128 byte blocks, 4128 bytes per update, 1 updates): 494623 opers/sec, 2041804569 bytes/sec
test 11 ( 8224 byte blocks, 8224 bytes per update, 1 updates): 254045 opers/sec, 2089271014 bytes/sec
testing speed of poly1305 (poly1305-simd)
test 0 ( 96 byte blocks, 16 bytes per update, 6 updates): 3826224 opers/sec, 367317552 bytes/sec
test 1 ( 96 byte blocks, 32 bytes per update, 3 updates): 5948638 opers/sec, 571069267 bytes/sec
test 2 ( 96 byte blocks, 96 bytes per update, 1 updates): 9439110 opers/sec, 906154627 bytes/sec
test 3 ( 288 byte blocks, 16 bytes per update, 18 updates): 1367756 opers/sec, 393913872 bytes/sec
test 4 ( 288 byte blocks, 32 bytes per update, 9 updates): 2056881 opers/sec, 592381958 bytes/sec
test 5 ( 288 byte blocks, 288 bytes per update, 1 updates): 3711153 opers/sec, 1068812179 bytes/sec
test 6 ( 1056 byte blocks, 32 bytes per update, 33 updates): 574940 opers/sec, 607136745 bytes/sec
test 7 ( 1056 byte blocks, 1056 bytes per update, 1 updates): 1948830 opers/sec, 2057964585 bytes/sec
test 8 ( 2080 byte blocks, 32 bytes per update, 65 updates): 293308 opers/sec, 610082096 bytes/sec
test 9 ( 2080 byte blocks, 2080 bytes per update, 1 updates): 1235224 opers/sec, 2569267792 bytes/sec
test 10 ( 4128 byte blocks, 4128 bytes per update, 1 updates): 684405 opers/sec, 2825226316 bytes/sec
test 11 ( 8224 byte blocks, 8224 bytes per update, 1 updates): 367101 opers/sec, 3019039446 bytes/sec
Benchmark results from a Core i5-4670T.
Signed-off-by: Martin Willi <martin@xxxxxxxxxxxxxx>
---
arch/x86/crypto/Makefile | 1 +
arch/x86/crypto/poly1305-avx2-x86_64.S | 386 +++++++++++++++++++++++++++++++++
arch/x86/crypto/poly1305_glue.c | 40 ++++
crypto/Kconfig | 2 +-
4 files changed, 428 insertions(+), 1 deletion(-)
create mode 100644 arch/x86/crypto/poly1305-avx2-x86_64.S
diff --git a/arch/x86/crypto/Makefile b/arch/x86/crypto/Makefile
index 5cf405c..9a2838c 100644
--- a/arch/x86/crypto/Makefile
+++ b/arch/x86/crypto/Makefile
@@ -89,6 +89,7 @@ sha1-ssse3-y := sha1_ssse3_asm.o sha1_ssse3_glue.o
poly1305-x86_64-y := poly1305-sse2-x86_64.o poly1305_glue.o
ifeq ($(avx2_supported),yes)
sha1-ssse3-y += sha1_avx2_x86_64_asm.o
+poly1305-x86_64-y += poly1305-avx2-x86_64.o
endif
crc32c-intel-y := crc32c-intel_glue.o
crc32c-intel-$(CONFIG_64BIT) += crc32c-pcl-intel-asm_64.o
diff --git a/arch/x86/crypto/poly1305-avx2-x86_64.S b/arch/x86/crypto/poly1305-avx2-x86_64.S
new file mode 100644
index 0000000..eff2f41
--- /dev/null
+++ b/arch/x86/crypto/poly1305-avx2-x86_64.S
@@ -0,0 +1,386 @@
+/*
+ * Poly1305 authenticator algorithm, RFC7539, x64 AVX2 functions
+ *
+ * Copyright (C) 2015 Martin Willi
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/linkage.h>
+
+.data
+.align 32
+
+ANMASK: .octa 0x0000000003ffffff0000000003ffffff
+ .octa 0x0000000003ffffff0000000003ffffff
+ORMASK: .octa 0x00000000010000000000000001000000
+ .octa 0x00000000010000000000000001000000
+
+.text
+
+#define h0 0x00(%rdi)
+#define h1 0x04(%rdi)
+#define h2 0x08(%rdi)
+#define h3 0x0c(%rdi)
+#define h4 0x10(%rdi)
+#define r0 0x00(%rdx)
+#define r1 0x04(%rdx)
+#define r2 0x08(%rdx)
+#define r3 0x0c(%rdx)
+#define r4 0x10(%rdx)
+#define u0 0x00(%r8)
+#define u1 0x04(%r8)
+#define u2 0x08(%r8)
+#define u3 0x0c(%r8)
+#define u4 0x10(%r8)
+#define w0 0x14(%r8)
+#define w1 0x18(%r8)
+#define w2 0x1c(%r8)
+#define w3 0x20(%r8)
+#define w4 0x24(%r8)
+#define y0 0x28(%r8)
+#define y1 0x2c(%r8)
+#define y2 0x30(%r8)
+#define y3 0x34(%r8)
+#define y4 0x38(%r8)
+#define m %rsi
+#define hc0 %ymm0
+#define hc1 %ymm1
+#define hc2 %ymm2
+#define hc3 %ymm3
+#define hc4 %ymm4
+#define hc0x %xmm0
+#define hc1x %xmm1
+#define hc2x %xmm2
+#define hc3x %xmm3
+#define hc4x %xmm4
+#define t1 %ymm5
+#define t2 %ymm6
+#define t1x %xmm5
+#define t2x %xmm6
+#define ruwy0 %ymm7
+#define ruwy1 %ymm8
+#define ruwy2 %ymm9
+#define ruwy3 %ymm10
+#define ruwy4 %ymm11
+#define ruwy0x %xmm7
+#define ruwy1x %xmm8
+#define ruwy2x %xmm9
+#define ruwy3x %xmm10
+#define ruwy4x %xmm11
+#define svxz1 %ymm12
+#define svxz2 %ymm13
+#define svxz3 %ymm14
+#define svxz4 %ymm15
+#define d0 %r9
+#define d1 %r10
+#define d2 %r11
+#define d3 %r12
+#define d4 %r13
+
+ENTRY(poly1305_4block_avx2)
+ # %rdi: Accumulator h[5]
+ # %rsi: 64 byte input block m
+ # %rdx: Poly1305 key r[5]
+ # %rcx: Quadblock count
+ # %r8: Poly1305 derived key r^2 u[5], r^3 w[5], r^4 y[5],
+
+ # This four-block variant uses loop unrolled block processing. It
+ # requires 4 Poly1305 keys: r, r^2, r^3 and r^4:
+ # h = (h + m) * r => h = (h + m1) * r^4 + m2 * r^3 + m3 * r^2 + m4 * r
+
+ vzeroupper
+ push %rbx
+ push %r12
+ push %r13
+
+ # combine r0,u0,w0,y0
+ vmovd y0,ruwy0x
+ vmovd w0,t1x
+ vpunpcklqdq t1,ruwy0,ruwy0
+ vmovd u0,t1x
+ vmovd r0,t2x
+ vpunpcklqdq t2,t1,t1
+ vperm2i128 $0x20,t1,ruwy0,ruwy0
+
+ # combine r1,u1,w1,y1 and s1=r1*5,v1=u1*5,x1=w1*5,z1=y1*5
+ vmovd y1,ruwy1x
+ vmovd w1,t1x
+ vpunpcklqdq t1,ruwy1,ruwy1
+ vmovd u1,t1x
+ vmovd r1,t2x
+ vpunpcklqdq t2,t1,t1
+ vperm2i128 $0x20,t1,ruwy1,ruwy1
+ vpslld $2,ruwy1,svxz1
+ vpaddd ruwy1,svxz1,svxz1
+
+ # combine r2,u2,w2,y2 and s2=r2*5,v2=u2*5,x2=w2*5,z2=y2*5
+ vmovd y2,ruwy2x
+ vmovd w2,t1x
+ vpunpcklqdq t1,ruwy2,ruwy2
+ vmovd u2,t1x
+ vmovd r2,t2x
+ vpunpcklqdq t2,t1,t1
+ vperm2i128 $0x20,t1,ruwy2,ruwy2
+ vpslld $2,ruwy2,svxz2
+ vpaddd ruwy2,svxz2,svxz2
+
+ # combine r3,u3,w3,y3 and s3=r3*5,v3=u3*5,x3=w3*5,z3=y3*5
+ vmovd y3,ruwy3x
+ vmovd w3,t1x
+ vpunpcklqdq t1,ruwy3,ruwy3
+ vmovd u3,t1x
+ vmovd r3,t2x
+ vpunpcklqdq t2,t1,t1
+ vperm2i128 $0x20,t1,ruwy3,ruwy3
+ vpslld $2,ruwy3,svxz3
+ vpaddd ruwy3,svxz3,svxz3
+
+ # combine r4,u4,w4,y4 and s4=r4*5,v4=u4*5,x4=w4*5,z4=y4*5
+ vmovd y4,ruwy4x
+ vmovd w4,t1x
+ vpunpcklqdq t1,ruwy4,ruwy4
+ vmovd u4,t1x
+ vmovd r4,t2x
+ vpunpcklqdq t2,t1,t1
+ vperm2i128 $0x20,t1,ruwy4,ruwy4
+ vpslld $2,ruwy4,svxz4
+ vpaddd ruwy4,svxz4,svxz4
+
+.Ldoblock4:
+ # hc0 = [m[48-51] & 0x3ffffff, m[32-35] & 0x3ffffff,
+ # m[16-19] & 0x3ffffff, m[ 0- 3] & 0x3ffffff + h0]
+ vmovd 0x00(m),hc0x
+ vmovd 0x10(m),t1x
+ vpunpcklqdq t1,hc0,hc0
+ vmovd 0x20(m),t1x
+ vmovd 0x30(m),t2x
+ vpunpcklqdq t2,t1,t1
+ vperm2i128 $0x20,t1,hc0,hc0
+ vpand ANMASK(%rip),hc0,hc0
+ vmovd h0,t1x
+ vpaddd t1,hc0,hc0
+ # hc1 = [(m[51-54] >> 2) & 0x3ffffff, (m[35-38] >> 2) & 0x3ffffff,
+ # (m[19-22] >> 2) & 0x3ffffff, (m[ 3- 6] >> 2) & 0x3ffffff + h1]
+ vmovd 0x03(m),hc1x
+ vmovd 0x13(m),t1x
+ vpunpcklqdq t1,hc1,hc1
+ vmovd 0x23(m),t1x
+ vmovd 0x33(m),t2x
+ vpunpcklqdq t2,t1,t1
+ vperm2i128 $0x20,t1,hc1,hc1
+ vpsrld $2,hc1,hc1
+ vpand ANMASK(%rip),hc1,hc1
+ vmovd h1,t1x
+ vpaddd t1,hc1,hc1
+ # hc2 = [(m[54-57] >> 4) & 0x3ffffff, (m[38-41] >> 4) & 0x3ffffff,
+ # (m[22-25] >> 4) & 0x3ffffff, (m[ 6- 9] >> 4) & 0x3ffffff + h2]
+ vmovd 0x06(m),hc2x
+ vmovd 0x16(m),t1x
+ vpunpcklqdq t1,hc2,hc2
+ vmovd 0x26(m),t1x
+ vmovd 0x36(m),t2x
+ vpunpcklqdq t2,t1,t1
+ vperm2i128 $0x20,t1,hc2,hc2
+ vpsrld $4,hc2,hc2
+ vpand ANMASK(%rip),hc2,hc2
+ vmovd h2,t1x
+ vpaddd t1,hc2,hc2
+ # hc3 = [(m[57-60] >> 6) & 0x3ffffff, (m[41-44] >> 6) & 0x3ffffff,
+ # (m[25-28] >> 6) & 0x3ffffff, (m[ 9-12] >> 6) & 0x3ffffff + h3]
+ vmovd 0x09(m),hc3x
+ vmovd 0x19(m),t1x
+ vpunpcklqdq t1,hc3,hc3
+ vmovd 0x29(m),t1x
+ vmovd 0x39(m),t2x
+ vpunpcklqdq t2,t1,t1
+ vperm2i128 $0x20,t1,hc3,hc3
+ vpsrld $6,hc3,hc3
+ vpand ANMASK(%rip),hc3,hc3
+ vmovd h3,t1x
+ vpaddd t1,hc3,hc3
+ # hc4 = [(m[60-63] >> 8) | (1<<24), (m[44-47] >> 8) | (1<<24),
+ # (m[28-31] >> 8) | (1<<24), (m[12-15] >> 8) | (1<<24) + h4]
+ vmovd 0x0c(m),hc4x
+ vmovd 0x1c(m),t1x
+ vpunpcklqdq t1,hc4,hc4
+ vmovd 0x2c(m),t1x
+ vmovd 0x3c(m),t2x
+ vpunpcklqdq t2,t1,t1
+ vperm2i128 $0x20,t1,hc4,hc4
+ vpsrld $8,hc4,hc4
+ vpor ORMASK(%rip),hc4,hc4
+ vmovd h4,t1x
+ vpaddd t1,hc4,hc4
+
+ # t1 = [ hc0[3] * r0, hc0[2] * u0, hc0[1] * w0, hc0[0] * y0 ]
+ vpmuludq hc0,ruwy0,t1
+ # t1 += [ hc1[3] * s4, hc1[2] * v4, hc1[1] * x4, hc1[0] * z4 ]
+ vpmuludq hc1,svxz4,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc2[3] * s3, hc2[2] * v3, hc2[1] * x3, hc2[0] * z3 ]
+ vpmuludq hc2,svxz3,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc3[3] * s2, hc3[2] * v2, hc3[1] * x2, hc3[0] * z2 ]
+ vpmuludq hc3,svxz2,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc4[3] * s1, hc4[2] * v1, hc4[1] * x1, hc4[0] * z1 ]
+ vpmuludq hc4,svxz1,t2
+ vpaddq t2,t1,t1
+ # d0 = t1[0] + t1[1] + t[2] + t[3]
+ vpermq $0xee,t1,t2
+ vpaddq t2,t1,t1
+ vpsrldq $8,t1,t2
+ vpaddq t2,t1,t1
+ vmovq t1x,d0
+
+ # t1 = [ hc0[3] * r1, hc0[2] * u1,hc0[1] * w1, hc0[0] * y1 ]
+ vpmuludq hc0,ruwy1,t1
+ # t1 += [ hc1[3] * r0, hc1[2] * u0, hc1[1] * w0, hc1[0] * y0 ]
+ vpmuludq hc1,ruwy0,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc2[3] * s4, hc2[2] * v4, hc2[1] * x4, hc2[0] * z4 ]
+ vpmuludq hc2,svxz4,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc3[3] * s3, hc3[2] * v3, hc3[1] * x3, hc3[0] * z3 ]
+ vpmuludq hc3,svxz3,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc4[3] * s2, hc4[2] * v2, hc4[1] * x2, hc4[0] * z2 ]
+ vpmuludq hc4,svxz2,t2
+ vpaddq t2,t1,t1
+ # d1 = t1[0] + t1[1] + t1[3] + t1[4]
+ vpermq $0xee,t1,t2
+ vpaddq t2,t1,t1
+ vpsrldq $8,t1,t2
+ vpaddq t2,t1,t1
+ vmovq t1x,d1
+
+ # t1 = [ hc0[3] * r2, hc0[2] * u2, hc0[1] * w2, hc0[0] * y2 ]
+ vpmuludq hc0,ruwy2,t1
+ # t1 += [ hc1[3] * r1, hc1[2] * u1, hc1[1] * w1, hc1[0] * y1 ]
+ vpmuludq hc1,ruwy1,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc2[3] * r0, hc2[2] * u0, hc2[1] * w0, hc2[0] * y0 ]
+ vpmuludq hc2,ruwy0,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc3[3] * s4, hc3[2] * v4, hc3[1] * x4, hc3[0] * z4 ]
+ vpmuludq hc3,svxz4,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc4[3] * s3, hc4[2] * v3, hc4[1] * x3, hc4[0] * z3 ]
+ vpmuludq hc4,svxz3,t2
+ vpaddq t2,t1,t1
+ # d2 = t1[0] + t1[1] + t1[2] + t1[3]
+ vpermq $0xee,t1,t2
+ vpaddq t2,t1,t1
+ vpsrldq $8,t1,t2
+ vpaddq t2,t1,t1
+ vmovq t1x,d2
+
+ # t1 = [ hc0[3] * r3, hc0[2] * u3, hc0[1] * w3, hc0[0] * y3 ]
+ vpmuludq hc0,ruwy3,t1
+ # t1 += [ hc1[3] * r2, hc1[2] * u2, hc1[1] * w2, hc1[0] * y2 ]
+ vpmuludq hc1,ruwy2,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc2[3] * r1, hc2[2] * u1, hc2[1] * w1, hc2[0] * y1 ]
+ vpmuludq hc2,ruwy1,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc3[3] * r0, hc3[2] * u0, hc3[1] * w0, hc3[0] * y0 ]
+ vpmuludq hc3,ruwy0,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc4[3] * s4, hc4[2] * v4, hc4[1] * x4, hc4[0] * z4 ]
+ vpmuludq hc4,svxz4,t2
+ vpaddq t2,t1,t1
+ # d3 = t1[0] + t1[1] + t1[2] + t1[3]
+ vpermq $0xee,t1,t2
+ vpaddq t2,t1,t1
+ vpsrldq $8,t1,t2
+ vpaddq t2,t1,t1
+ vmovq t1x,d3
+
+ # t1 = [ hc0[3] * r4, hc0[2] * u4, hc0[1] * w4, hc0[0] * y4 ]
+ vpmuludq hc0,ruwy4,t1
+ # t1 += [ hc1[3] * r3, hc1[2] * u3, hc1[1] * w3, hc1[0] * y3 ]
+ vpmuludq hc1,ruwy3,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc2[3] * r2, hc2[2] * u2, hc2[1] * w2, hc2[0] * y2 ]
+ vpmuludq hc2,ruwy2,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc3[3] * r1, hc3[2] * u1, hc3[1] * w1, hc3[0] * y1 ]
+ vpmuludq hc3,ruwy1,t2
+ vpaddq t2,t1,t1
+ # t1 += [ hc4[3] * r0, hc4[2] * u0, hc4[1] * w0, hc4[0] * y0 ]
+ vpmuludq hc4,ruwy0,t2
+ vpaddq t2,t1,t1
+ # d4 = t1[0] + t1[1] + t1[2] + t1[3]
+ vpermq $0xee,t1,t2
+ vpaddq t2,t1,t1
+ vpsrldq $8,t1,t2
+ vpaddq t2,t1,t1
+ vmovq t1x,d4
+
+ # d1 += d0 >> 26
+ mov d0,%rax
+ shr $26,%rax
+ add %rax,d1
+ # h0 = d0 & 0x3ffffff
+ mov d0,%rbx
+ and $0x3ffffff,%ebx
+
+ # d2 += d1 >> 26
+ mov d1,%rax
+ shr $26,%rax
+ add %rax,d2
+ # h1 = d1 & 0x3ffffff
+ mov d1,%rax
+ and $0x3ffffff,%eax
+ mov %eax,h1
+
+ # d3 += d2 >> 26
+ mov d2,%rax
+ shr $26,%rax
+ add %rax,d3
+ # h2 = d2 & 0x3ffffff
+ mov d2,%rax
+ and $0x3ffffff,%eax
+ mov %eax,h2
+
+ # d4 += d3 >> 26
+ mov d3,%rax
+ shr $26,%rax
+ add %rax,d4
+ # h3 = d3 & 0x3ffffff
+ mov d3,%rax
+ and $0x3ffffff,%eax
+ mov %eax,h3
+
+ # h0 += (d4 >> 26) * 5
+ mov d4,%rax
+ shr $26,%rax
+ lea (%eax,%eax,4),%eax
+ add %eax,%ebx
+ # h4 = d4 & 0x3ffffff
+ mov d4,%rax
+ and $0x3ffffff,%eax
+ mov %eax,h4
+
+ # h1 += h0 >> 26
+ mov %ebx,%eax
+ shr $26,%eax
+ add %eax,h1
+ # h0 = h0 & 0x3ffffff
+ andl $0x3ffffff,%ebx
+ mov %ebx,h0
+
+ add $0x40,m
+ dec %rcx
+ jnz .Ldoblock4
+
+ vzeroupper
+ pop %r13
+ pop %r12
+ pop %rbx
+ ret
+ENDPROC(poly1305_4block_avx2)
diff --git a/arch/x86/crypto/poly1305_glue.c b/arch/x86/crypto/poly1305_glue.c
index b7c33d0..f7170d7 100644
--- a/arch/x86/crypto/poly1305_glue.c
+++ b/arch/x86/crypto/poly1305_glue.c
@@ -22,20 +22,33 @@ struct poly1305_simd_desc_ctx {
struct poly1305_desc_ctx base;
/* derived key u set? */
bool uset;
+#ifdef CONFIG_AS_AVX2
+ /* derived keys r^3, r^4 set? */
+ bool wset;
+#endif
/* derived Poly1305 key r^2 */
u32 u[5];
+ /* ... silently appended r^3 and r^4 when using AVX2 */
};
asmlinkage void poly1305_block_sse2(u32 *h, const u8 *src,
const u32 *r, unsigned int blocks);
asmlinkage void poly1305_2block_sse2(u32 *h, const u8 *src, const u32 *r,
unsigned int blocks, const u32 *u);
+#ifdef CONFIG_AS_AVX2
+asmlinkage void poly1305_4block_avx2(u32 *h, const u8 *src, const u32 *r,
+ unsigned int blocks, const u32 *u);
+static bool poly1305_use_avx2;
+#endif
static int poly1305_simd_init(struct shash_desc *desc)
{
struct poly1305_simd_desc_ctx *sctx = shash_desc_ctx(desc);
sctx->uset = false;
+#ifdef CONFIG_AS_AVX2
+ sctx->wset = false;
+#endif
return crypto_poly1305_init(desc);
}
@@ -66,6 +79,26 @@ static unsigned int poly1305_simd_blocks(struct poly1305_desc_ctx *dctx,
srclen = datalen;
}
+#ifdef CONFIG_AS_AVX2
+ if (poly1305_use_avx2 && srclen >= POLY1305_BLOCK_SIZE * 4) {
+ if (unlikely(!sctx->wset)) {
+ if (!sctx->uset) {
+ memcpy(sctx->u, dctx->r, sizeof(sctx->u));
+ poly1305_simd_mult(sctx->u, dctx->r);
+ sctx->uset = true;
+ }
+ memcpy(sctx->u + 5, sctx->u, sizeof(sctx->u));
+ poly1305_simd_mult(sctx->u + 5, dctx->r);
+ memcpy(sctx->u + 10, sctx->u + 5, sizeof(sctx->u));
+ poly1305_simd_mult(sctx->u + 10, dctx->r);
+ sctx->wset = true;
+ }
+ blocks = srclen / (POLY1305_BLOCK_SIZE * 4);
+ poly1305_4block_avx2(dctx->h, src, dctx->r, blocks, sctx->u);
+ src += POLY1305_BLOCK_SIZE * 4 * blocks;
+ srclen -= POLY1305_BLOCK_SIZE * 4 * blocks;
+ }
+#endif
if (likely(srclen >= POLY1305_BLOCK_SIZE * 2)) {
if (unlikely(!sctx->uset)) {
memcpy(sctx->u, dctx->r, sizeof(sctx->u));
@@ -149,6 +182,13 @@ static int __init poly1305_simd_mod_init(void)
if (!cpu_has_xmm2)
return -ENODEV;
+#ifdef CONFIG_AS_AVX2
+ poly1305_use_avx2 = cpu_has_avx && cpu_has_avx2 &&
+ cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, NULL);
+ alg.descsize = sizeof(struct poly1305_simd_desc_ctx);
+ if (poly1305_use_avx2)
+ alg.descsize += 10 * sizeof(u32);
+#endif
return crypto_register_shash(&alg);
}
diff --git a/crypto/Kconfig b/crypto/Kconfig
index c57478c..354bb69 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -471,7 +471,7 @@ config CRYPTO_POLY1305
in IETF protocols. This is the portable C implementation of Poly1305.
config CRYPTO_POLY1305_X86_64
- tristate "Poly1305 authenticator algorithm (x86_64/SSE2)"
+ tristate "Poly1305 authenticator algorithm (x86_64/SSE2/AVX2)"
depends on X86 && 64BIT
select CRYPTO_POLY1305
help
--
1.9.1
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