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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 | /* SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause */ /* * AES CTR mode by8 optimization with AVX instructions. (x86_64) * * Copyright(c) 2014 Intel Corporation. * * Contact Information: * James Guilford <james.guilford@intel.com> * Sean Gulley <sean.m.gulley@intel.com> * Chandramouli Narayanan <mouli@linux.intel.com> */ /* * This is AES128/192/256 CTR mode optimization implementation. It requires * the support of Intel(R) AESNI and AVX instructions. * * This work was inspired by the AES CTR mode optimization published * in Intel Optimized IPSEC Cryptographic library. * Additional information on it can be found at: * https://github.com/intel/intel-ipsec-mb */ #include <linux/linkage.h> #define VMOVDQ vmovdqu /* * Note: the "x" prefix in these aliases means "this is an xmm register". The * alias prefixes have no relation to XCTR where the "X" prefix means "XOR * counter". */ #define xdata0 %xmm0 #define xdata1 %xmm1 #define xdata2 %xmm2 #define xdata3 %xmm3 #define xdata4 %xmm4 #define xdata5 %xmm5 #define xdata6 %xmm6 #define xdata7 %xmm7 #define xcounter %xmm8 // CTR mode only #define xiv %xmm8 // XCTR mode only #define xbyteswap %xmm9 // CTR mode only #define xtmp %xmm9 // XCTR mode only #define xkey0 %xmm10 #define xkey4 %xmm11 #define xkey8 %xmm12 #define xkey12 %xmm13 #define xkeyA %xmm14 #define xkeyB %xmm15 #define p_in %rdi #define p_iv %rsi #define p_keys %rdx #define p_out %rcx #define num_bytes %r8 #define counter %r9 // XCTR mode only #define tmp %r10 #define DDQ_DATA 0 #define XDATA 1 #define KEY_128 1 #define KEY_192 2 #define KEY_256 3 .section .rodata .align 16 byteswap_const: .octa 0x000102030405060708090A0B0C0D0E0F ddq_low_msk: .octa 0x0000000000000000FFFFFFFFFFFFFFFF ddq_high_add_1: .octa 0x00000000000000010000000000000000 ddq_add_1: .octa 0x00000000000000000000000000000001 ddq_add_2: .octa 0x00000000000000000000000000000002 ddq_add_3: .octa 0x00000000000000000000000000000003 ddq_add_4: .octa 0x00000000000000000000000000000004 ddq_add_5: .octa 0x00000000000000000000000000000005 ddq_add_6: .octa 0x00000000000000000000000000000006 ddq_add_7: .octa 0x00000000000000000000000000000007 ddq_add_8: .octa 0x00000000000000000000000000000008 .text /* generate a unique variable for ddq_add_x */ /* generate a unique variable for xmm register */ .macro setxdata n var_xdata = %xmm\n .endm /* club the numeric 'id' to the symbol 'name' */ .macro club name, id .altmacro .if \name == XDATA setxdata %\id .endif .noaltmacro .endm /* * do_aes num_in_par load_keys key_len * This increments p_in, but not p_out */ .macro do_aes b, k, key_len, xctr .set by, \b .set load_keys, \k .set klen, \key_len .if (load_keys) vmovdqa 0*16(p_keys), xkey0 .endif .if \xctr movq counter, xtmp .set i, 0 .rept (by) club XDATA, i vpaddq (ddq_add_1 + 16 * i)(%rip), xtmp, var_xdata .set i, (i +1) .endr .set i, 0 .rept (by) club XDATA, i vpxor xiv, var_xdata, var_xdata .set i, (i +1) .endr .else vpshufb xbyteswap, xcounter, xdata0 .set i, 1 .rept (by - 1) club XDATA, i vpaddq (ddq_add_1 + 16 * (i - 1))(%rip), xcounter, var_xdata vptest ddq_low_msk(%rip), var_xdata jnz 1f vpaddq ddq_high_add_1(%rip), var_xdata, var_xdata vpaddq ddq_high_add_1(%rip), xcounter, xcounter 1: vpshufb xbyteswap, var_xdata, var_xdata .set i, (i +1) .endr .endif vmovdqa 1*16(p_keys), xkeyA vpxor xkey0, xdata0, xdata0 .if \xctr add $by, counter .else vpaddq (ddq_add_1 + 16 * (by - 1))(%rip), xcounter, xcounter vptest ddq_low_msk(%rip), xcounter jnz 1f vpaddq ddq_high_add_1(%rip), xcounter, xcounter 1: .endif .set i, 1 .rept (by - 1) club XDATA, i vpxor xkey0, var_xdata, var_xdata .set i, (i +1) .endr vmovdqa 2*16(p_keys), xkeyB .set i, 0 .rept by club XDATA, i vaesenc xkeyA, var_xdata, var_xdata /* key 1 */ .set i, (i +1) .endr .if (klen == KEY_128) .if (load_keys) vmovdqa 3*16(p_keys), xkey4 .endif .else vmovdqa 3*16(p_keys), xkeyA .endif .set i, 0 .rept by club XDATA, i vaesenc xkeyB, var_xdata, var_xdata /* key 2 */ .set i, (i +1) .endr add $(16*by), p_in .if (klen == KEY_128) vmovdqa 4*16(p_keys), xkeyB .else .if (load_keys) vmovdqa 4*16(p_keys), xkey4 .endif .endif .set i, 0 .rept by club XDATA, i /* key 3 */ .if (klen == KEY_128) vaesenc xkey4, var_xdata, var_xdata .else vaesenc xkeyA, var_xdata, var_xdata .endif .set i, (i +1) .endr vmovdqa 5*16(p_keys), xkeyA .set i, 0 .rept by club XDATA, i /* key 4 */ .if (klen == KEY_128) vaesenc xkeyB, var_xdata, var_xdata .else vaesenc xkey4, var_xdata, var_xdata .endif .set i, (i +1) .endr .if (klen == KEY_128) .if (load_keys) vmovdqa 6*16(p_keys), xkey8 .endif .else vmovdqa 6*16(p_keys), xkeyB .endif .set i, 0 .rept by club XDATA, i vaesenc xkeyA, var_xdata, var_xdata /* key 5 */ .set i, (i +1) .endr vmovdqa 7*16(p_keys), xkeyA .set i, 0 .rept by club XDATA, i /* key 6 */ .if (klen == KEY_128) vaesenc xkey8, var_xdata, var_xdata .else vaesenc xkeyB, var_xdata, var_xdata .endif .set i, (i +1) .endr .if (klen == KEY_128) vmovdqa 8*16(p_keys), xkeyB .else .if (load_keys) vmovdqa 8*16(p_keys), xkey8 .endif .endif .set i, 0 .rept by club XDATA, i vaesenc xkeyA, var_xdata, var_xdata /* key 7 */ .set i, (i +1) .endr .if (klen == KEY_128) .if (load_keys) vmovdqa 9*16(p_keys), xkey12 .endif .else vmovdqa 9*16(p_keys), xkeyA .endif .set i, 0 .rept by club XDATA, i /* key 8 */ .if (klen == KEY_128) vaesenc xkeyB, var_xdata, var_xdata .else vaesenc xkey8, var_xdata, var_xdata .endif .set i, (i +1) .endr vmovdqa 10*16(p_keys), xkeyB .set i, 0 .rept by club XDATA, i /* key 9 */ .if (klen == KEY_128) vaesenc xkey12, var_xdata, var_xdata .else vaesenc xkeyA, var_xdata, var_xdata .endif .set i, (i +1) .endr .if (klen != KEY_128) vmovdqa 11*16(p_keys), xkeyA .endif .set i, 0 .rept by club XDATA, i /* key 10 */ .if (klen == KEY_128) vaesenclast xkeyB, var_xdata, var_xdata .else vaesenc xkeyB, var_xdata, var_xdata .endif .set i, (i +1) .endr .if (klen != KEY_128) .if (load_keys) vmovdqa 12*16(p_keys), xkey12 .endif .set i, 0 .rept by club XDATA, i vaesenc xkeyA, var_xdata, var_xdata /* key 11 */ .set i, (i +1) .endr .if (klen == KEY_256) vmovdqa 13*16(p_keys), xkeyA .endif .set i, 0 .rept by club XDATA, i .if (klen == KEY_256) /* key 12 */ vaesenc xkey12, var_xdata, var_xdata .else vaesenclast xkey12, var_xdata, var_xdata .endif .set i, (i +1) .endr .if (klen == KEY_256) vmovdqa 14*16(p_keys), xkeyB .set i, 0 .rept by club XDATA, i /* key 13 */ vaesenc xkeyA, var_xdata, var_xdata .set i, (i +1) .endr .set i, 0 .rept by club XDATA, i /* key 14 */ vaesenclast xkeyB, var_xdata, var_xdata .set i, (i +1) .endr .endif .endif .set i, 0 .rept (by / 2) .set j, (i+1) VMOVDQ (i*16 - 16*by)(p_in), xkeyA VMOVDQ (j*16 - 16*by)(p_in), xkeyB club XDATA, i vpxor xkeyA, var_xdata, var_xdata club XDATA, j vpxor xkeyB, var_xdata, var_xdata .set i, (i+2) .endr .if (i < by) VMOVDQ (i*16 - 16*by)(p_in), xkeyA club XDATA, i vpxor xkeyA, var_xdata, var_xdata .endif .set i, 0 .rept by club XDATA, i VMOVDQ var_xdata, i*16(p_out) .set i, (i+1) .endr .endm .macro do_aes_load val, key_len, xctr do_aes \val, 1, \key_len, \xctr .endm .macro do_aes_noload val, key_len, xctr do_aes \val, 0, \key_len, \xctr .endm /* main body of aes ctr load */ .macro do_aes_ctrmain key_len, xctr cmp $16, num_bytes jb .Ldo_return2\xctr\key_len .if \xctr shr $4, counter vmovdqu (p_iv), xiv .else vmovdqa byteswap_const(%rip), xbyteswap vmovdqu (p_iv), xcounter vpshufb xbyteswap, xcounter, xcounter .endif mov num_bytes, tmp and $(7*16), tmp jz .Lmult_of_8_blks\xctr\key_len /* 1 <= tmp <= 7 */ cmp $(4*16), tmp jg .Lgt4\xctr\key_len je .Leq4\xctr\key_len .Llt4\xctr\key_len: cmp $(2*16), tmp jg .Leq3\xctr\key_len je .Leq2\xctr\key_len .Leq1\xctr\key_len: do_aes_load 1, \key_len, \xctr add $(1*16), p_out and $(~7*16), num_bytes jz .Ldo_return2\xctr\key_len jmp .Lmain_loop2\xctr\key_len .Leq2\xctr\key_len: do_aes_load 2, \key_len, \xctr add $(2*16), p_out and $(~7*16), num_bytes jz .Ldo_return2\xctr\key_len jmp .Lmain_loop2\xctr\key_len .Leq3\xctr\key_len: do_aes_load 3, \key_len, \xctr add $(3*16), p_out and $(~7*16), num_bytes jz .Ldo_return2\xctr\key_len jmp .Lmain_loop2\xctr\key_len .Leq4\xctr\key_len: do_aes_load 4, \key_len, \xctr add $(4*16), p_out and $(~7*16), num_bytes jz .Ldo_return2\xctr\key_len jmp .Lmain_loop2\xctr\key_len .Lgt4\xctr\key_len: cmp $(6*16), tmp jg .Leq7\xctr\key_len je .Leq6\xctr\key_len .Leq5\xctr\key_len: do_aes_load 5, \key_len, \xctr add $(5*16), p_out and $(~7*16), num_bytes jz .Ldo_return2\xctr\key_len jmp .Lmain_loop2\xctr\key_len .Leq6\xctr\key_len: do_aes_load 6, \key_len, \xctr add $(6*16), p_out and $(~7*16), num_bytes jz .Ldo_return2\xctr\key_len jmp .Lmain_loop2\xctr\key_len .Leq7\xctr\key_len: do_aes_load 7, \key_len, \xctr add $(7*16), p_out and $(~7*16), num_bytes jz .Ldo_return2\xctr\key_len jmp .Lmain_loop2\xctr\key_len .Lmult_of_8_blks\xctr\key_len: .if (\key_len != KEY_128) vmovdqa 0*16(p_keys), xkey0 vmovdqa 4*16(p_keys), xkey4 vmovdqa 8*16(p_keys), xkey8 vmovdqa 12*16(p_keys), xkey12 .else vmovdqa 0*16(p_keys), xkey0 vmovdqa 3*16(p_keys), xkey4 vmovdqa 6*16(p_keys), xkey8 vmovdqa 9*16(p_keys), xkey12 .endif .align 16 .Lmain_loop2\xctr\key_len: /* num_bytes is a multiple of 8 and >0 */ do_aes_noload 8, \key_len, \xctr add $(8*16), p_out sub $(8*16), num_bytes jne .Lmain_loop2\xctr\key_len .Ldo_return2\xctr\key_len: .if !\xctr /* return updated IV */ vpshufb xbyteswap, xcounter, xcounter vmovdqu xcounter, (p_iv) .endif RET .endm /* * routine to do AES128 CTR enc/decrypt "by8" * XMM registers are clobbered. * Saving/restoring must be done at a higher level * aes_ctr_enc_128_avx_by8(void *in, void *iv, void *keys, void *out, * unsigned int num_bytes) */ SYM_FUNC_START(aes_ctr_enc_128_avx_by8) /* call the aes main loop */ do_aes_ctrmain KEY_128 0 SYM_FUNC_END(aes_ctr_enc_128_avx_by8) /* * routine to do AES192 CTR enc/decrypt "by8" * XMM registers are clobbered. * Saving/restoring must be done at a higher level * aes_ctr_enc_192_avx_by8(void *in, void *iv, void *keys, void *out, * unsigned int num_bytes) */ SYM_FUNC_START(aes_ctr_enc_192_avx_by8) /* call the aes main loop */ do_aes_ctrmain KEY_192 0 SYM_FUNC_END(aes_ctr_enc_192_avx_by8) /* * routine to do AES256 CTR enc/decrypt "by8" * XMM registers are clobbered. * Saving/restoring must be done at a higher level * aes_ctr_enc_256_avx_by8(void *in, void *iv, void *keys, void *out, * unsigned int num_bytes) */ SYM_FUNC_START(aes_ctr_enc_256_avx_by8) /* call the aes main loop */ do_aes_ctrmain KEY_256 0 SYM_FUNC_END(aes_ctr_enc_256_avx_by8) /* * routine to do AES128 XCTR enc/decrypt "by8" * XMM registers are clobbered. * Saving/restoring must be done at a higher level * aes_xctr_enc_128_avx_by8(const u8 *in, const u8 *iv, const void *keys, * u8* out, unsigned int num_bytes, unsigned int byte_ctr) */ SYM_FUNC_START(aes_xctr_enc_128_avx_by8) /* call the aes main loop */ do_aes_ctrmain KEY_128 1 SYM_FUNC_END(aes_xctr_enc_128_avx_by8) /* * routine to do AES192 XCTR enc/decrypt "by8" * XMM registers are clobbered. * Saving/restoring must be done at a higher level * aes_xctr_enc_192_avx_by8(const u8 *in, const u8 *iv, const void *keys, * u8* out, unsigned int num_bytes, unsigned int byte_ctr) */ SYM_FUNC_START(aes_xctr_enc_192_avx_by8) /* call the aes main loop */ do_aes_ctrmain KEY_192 1 SYM_FUNC_END(aes_xctr_enc_192_avx_by8) /* * routine to do AES256 XCTR enc/decrypt "by8" * XMM registers are clobbered. * Saving/restoring must be done at a higher level * aes_xctr_enc_256_avx_by8(const u8 *in, const u8 *iv, const void *keys, * u8* out, unsigned int num_bytes, unsigned int byte_ctr) */ SYM_FUNC_START(aes_xctr_enc_256_avx_by8) /* call the aes main loop */ do_aes_ctrmain KEY_256 1 SYM_FUNC_END(aes_xctr_enc_256_avx_by8) |