1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* -*- linux-c -*- ------------------------------------------------------- * 3 * 4 * Copyright (C) 2012 Intel Corporation 5 * Author: Yuanhan Liu <yuanhan.liu@linux.intel.com> 6 * 7 * Based on sse2.c: Copyright 2002 H. Peter Anvin - All Rights Reserved 8 * 9 * ----------------------------------------------------------------------- */ 10 11 /* 12 * AVX2 implementation of RAID-6 syndrome functions 13 * 14 */ 15 16 #include <linux/raid/pq.h> 17 #include "x86.h" 18 19 static const struct raid6_avx2_constants { 20 u64 x1d[4]; 21 } raid6_avx2_constants __aligned(32) = { 22 { 0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1d1d1dULL, 23 0x1d1d1d1d1d1d1d1dULL, 0x1d1d1d1d1d1d1d1dULL,}, 24 }; 25 26 static int raid6_have_avx2(void) 27 { 28 return boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_AVX); 29 } 30 31 /* 32 * Plain AVX2 implementation 33 */ 34 static void raid6_avx21_gen_syndrome(int disks, size_t bytes, void **ptrs) 35 { 36 u8 **dptr = (u8 **)ptrs; 37 u8 *p, *q; 38 int d, z, z0; 39 40 z0 = disks - 3; /* Highest data disk */ 41 p = dptr[z0+1]; /* XOR parity */ 42 q = dptr[z0+2]; /* RS syndrome */ 43 44 kernel_fpu_begin(); 45 46 asm volatile("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0])); 47 asm volatile("vpxor %ymm3,%ymm3,%ymm3"); /* Zero temp */ 48 49 for (d = 0; d < bytes; d += 32) { 50 asm volatile("prefetchnta %0" : : "m" (dptr[z0][d])); 51 asm volatile("vmovdqa %0,%%ymm2" : : "m" (dptr[z0][d]));/* P[0] */ 52 asm volatile("prefetchnta %0" : : "m" (dptr[z0-1][d])); 53 asm volatile("vmovdqa %ymm2,%ymm4");/* Q[0] */ 54 asm volatile("vmovdqa %0,%%ymm6" : : "m" (dptr[z0-1][d])); 55 for (z = z0-2; z >= 0; z--) { 56 asm volatile("prefetchnta %0" : : "m" (dptr[z][d])); 57 asm volatile("vpcmpgtb %ymm4,%ymm3,%ymm5"); 58 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 59 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 60 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 61 asm volatile("vpxor %ymm6,%ymm2,%ymm2"); 62 asm volatile("vpxor %ymm6,%ymm4,%ymm4"); 63 asm volatile("vmovdqa %0,%%ymm6" : : "m" (dptr[z][d])); 64 } 65 asm volatile("vpcmpgtb %ymm4,%ymm3,%ymm5"); 66 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 67 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 68 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 69 asm volatile("vpxor %ymm6,%ymm2,%ymm2"); 70 asm volatile("vpxor %ymm6,%ymm4,%ymm4"); 71 72 asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d])); 73 asm volatile("vpxor %ymm2,%ymm2,%ymm2"); 74 asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d])); 75 asm volatile("vpxor %ymm4,%ymm4,%ymm4"); 76 } 77 78 asm volatile("sfence" : : : "memory"); 79 kernel_fpu_end(); 80 } 81 82 static void raid6_avx21_xor_syndrome(int disks, int start, int stop, 83 size_t bytes, void **ptrs) 84 { 85 u8 **dptr = (u8 **)ptrs; 86 u8 *p, *q; 87 int d, z, z0; 88 89 z0 = stop; /* P/Q right side optimization */ 90 p = dptr[disks-2]; /* XOR parity */ 91 q = dptr[disks-1]; /* RS syndrome */ 92 93 kernel_fpu_begin(); 94 95 asm volatile("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0])); 96 97 for (d = 0 ; d < bytes ; d += 32) { 98 asm volatile("vmovdqa %0,%%ymm4" :: "m" (dptr[z0][d])); 99 asm volatile("vmovdqa %0,%%ymm2" : : "m" (p[d])); 100 asm volatile("vpxor %ymm4,%ymm2,%ymm2"); 101 /* P/Q data pages */ 102 for (z = z0-1 ; z >= start ; z--) { 103 asm volatile("vpxor %ymm5,%ymm5,%ymm5"); 104 asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5"); 105 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 106 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 107 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 108 asm volatile("vmovdqa %0,%%ymm5" :: "m" (dptr[z][d])); 109 asm volatile("vpxor %ymm5,%ymm2,%ymm2"); 110 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 111 } 112 /* P/Q left side optimization */ 113 for (z = start-1 ; z >= 0 ; z--) { 114 asm volatile("vpxor %ymm5,%ymm5,%ymm5"); 115 asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5"); 116 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 117 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 118 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 119 } 120 asm volatile("vpxor %0,%%ymm4,%%ymm4" : : "m" (q[d])); 121 /* Don't use movntdq for r/w memory area < cache line */ 122 asm volatile("vmovdqa %%ymm4,%0" : "=m" (q[d])); 123 asm volatile("vmovdqa %%ymm2,%0" : "=m" (p[d])); 124 } 125 126 asm volatile("sfence" : : : "memory"); 127 kernel_fpu_end(); 128 } 129 130 const struct raid6_calls raid6_avx2x1 = { 131 raid6_avx21_gen_syndrome, 132 raid6_avx21_xor_syndrome, 133 raid6_have_avx2, 134 "avx2x1", 135 .priority = 2 /* Prefer AVX2 over priority 1 (SSE2 and others) */ 136 }; 137 138 /* 139 * Unrolled-by-2 AVX2 implementation 140 */ 141 static void raid6_avx22_gen_syndrome(int disks, size_t bytes, void **ptrs) 142 { 143 u8 **dptr = (u8 **)ptrs; 144 u8 *p, *q; 145 int d, z, z0; 146 147 z0 = disks - 3; /* Highest data disk */ 148 p = dptr[z0+1]; /* XOR parity */ 149 q = dptr[z0+2]; /* RS syndrome */ 150 151 kernel_fpu_begin(); 152 153 asm volatile("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0])); 154 asm volatile("vpxor %ymm1,%ymm1,%ymm1"); /* Zero temp */ 155 156 /* We uniformly assume a single prefetch covers at least 32 bytes */ 157 for (d = 0; d < bytes; d += 64) { 158 asm volatile("prefetchnta %0" : : "m" (dptr[z0][d])); 159 asm volatile("prefetchnta %0" : : "m" (dptr[z0][d+32])); 160 asm volatile("vmovdqa %0,%%ymm2" : : "m" (dptr[z0][d]));/* P[0] */ 161 asm volatile("vmovdqa %0,%%ymm3" : : "m" (dptr[z0][d+32]));/* P[1] */ 162 asm volatile("vmovdqa %ymm2,%ymm4"); /* Q[0] */ 163 asm volatile("vmovdqa %ymm3,%ymm6"); /* Q[1] */ 164 for (z = z0-1; z >= 0; z--) { 165 asm volatile("prefetchnta %0" : : "m" (dptr[z][d])); 166 asm volatile("prefetchnta %0" : : "m" (dptr[z][d+32])); 167 asm volatile("vpcmpgtb %ymm4,%ymm1,%ymm5"); 168 asm volatile("vpcmpgtb %ymm6,%ymm1,%ymm7"); 169 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 170 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 171 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 172 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 173 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 174 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 175 asm volatile("vmovdqa %0,%%ymm5" : : "m" (dptr[z][d])); 176 asm volatile("vmovdqa %0,%%ymm7" : : "m" (dptr[z][d+32])); 177 asm volatile("vpxor %ymm5,%ymm2,%ymm2"); 178 asm volatile("vpxor %ymm7,%ymm3,%ymm3"); 179 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 180 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 181 } 182 asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d])); 183 asm volatile("vmovntdq %%ymm3,%0" : "=m" (p[d+32])); 184 asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d])); 185 asm volatile("vmovntdq %%ymm6,%0" : "=m" (q[d+32])); 186 } 187 188 asm volatile("sfence" : : : "memory"); 189 kernel_fpu_end(); 190 } 191 192 static void raid6_avx22_xor_syndrome(int disks, int start, int stop, 193 size_t bytes, void **ptrs) 194 { 195 u8 **dptr = (u8 **)ptrs; 196 u8 *p, *q; 197 int d, z, z0; 198 199 z0 = stop; /* P/Q right side optimization */ 200 p = dptr[disks-2]; /* XOR parity */ 201 q = dptr[disks-1]; /* RS syndrome */ 202 203 kernel_fpu_begin(); 204 205 asm volatile("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0])); 206 207 for (d = 0 ; d < bytes ; d += 64) { 208 asm volatile("vmovdqa %0,%%ymm4" :: "m" (dptr[z0][d])); 209 asm volatile("vmovdqa %0,%%ymm6" :: "m" (dptr[z0][d+32])); 210 asm volatile("vmovdqa %0,%%ymm2" : : "m" (p[d])); 211 asm volatile("vmovdqa %0,%%ymm3" : : "m" (p[d+32])); 212 asm volatile("vpxor %ymm4,%ymm2,%ymm2"); 213 asm volatile("vpxor %ymm6,%ymm3,%ymm3"); 214 /* P/Q data pages */ 215 for (z = z0-1 ; z >= start ; z--) { 216 asm volatile("vpxor %ymm5,%ymm5,%ymm5"); 217 asm volatile("vpxor %ymm7,%ymm7,%ymm7"); 218 asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5"); 219 asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7"); 220 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 221 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 222 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 223 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 224 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 225 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 226 asm volatile("vmovdqa %0,%%ymm5" :: "m" (dptr[z][d])); 227 asm volatile("vmovdqa %0,%%ymm7" 228 :: "m" (dptr[z][d+32])); 229 asm volatile("vpxor %ymm5,%ymm2,%ymm2"); 230 asm volatile("vpxor %ymm7,%ymm3,%ymm3"); 231 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 232 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 233 } 234 /* P/Q left side optimization */ 235 for (z = start-1 ; z >= 0 ; z--) { 236 asm volatile("vpxor %ymm5,%ymm5,%ymm5"); 237 asm volatile("vpxor %ymm7,%ymm7,%ymm7"); 238 asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5"); 239 asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7"); 240 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 241 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 242 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 243 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 244 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 245 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 246 } 247 asm volatile("vpxor %0,%%ymm4,%%ymm4" : : "m" (q[d])); 248 asm volatile("vpxor %0,%%ymm6,%%ymm6" : : "m" (q[d+32])); 249 /* Don't use movntdq for r/w memory area < cache line */ 250 asm volatile("vmovdqa %%ymm4,%0" : "=m" (q[d])); 251 asm volatile("vmovdqa %%ymm6,%0" : "=m" (q[d+32])); 252 asm volatile("vmovdqa %%ymm2,%0" : "=m" (p[d])); 253 asm volatile("vmovdqa %%ymm3,%0" : "=m" (p[d+32])); 254 } 255 256 asm volatile("sfence" : : : "memory"); 257 kernel_fpu_end(); 258 } 259 260 const struct raid6_calls raid6_avx2x2 = { 261 raid6_avx22_gen_syndrome, 262 raid6_avx22_xor_syndrome, 263 raid6_have_avx2, 264 "avx2x2", 265 .priority = 2 /* Prefer AVX2 over priority 1 (SSE2 and others) */ 266 }; 267 268 #ifdef CONFIG_X86_64 269 270 /* 271 * Unrolled-by-4 AVX2 implementation 272 */ 273 static void raid6_avx24_gen_syndrome(int disks, size_t bytes, void **ptrs) 274 { 275 u8 **dptr = (u8 **)ptrs; 276 u8 *p, *q; 277 int d, z, z0; 278 279 z0 = disks - 3; /* Highest data disk */ 280 p = dptr[z0+1]; /* XOR parity */ 281 q = dptr[z0+2]; /* RS syndrome */ 282 283 kernel_fpu_begin(); 284 285 asm volatile("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0])); 286 asm volatile("vpxor %ymm1,%ymm1,%ymm1"); /* Zero temp */ 287 asm volatile("vpxor %ymm2,%ymm2,%ymm2"); /* P[0] */ 288 asm volatile("vpxor %ymm3,%ymm3,%ymm3"); /* P[1] */ 289 asm volatile("vpxor %ymm4,%ymm4,%ymm4"); /* Q[0] */ 290 asm volatile("vpxor %ymm6,%ymm6,%ymm6"); /* Q[1] */ 291 asm volatile("vpxor %ymm10,%ymm10,%ymm10"); /* P[2] */ 292 asm volatile("vpxor %ymm11,%ymm11,%ymm11"); /* P[3] */ 293 asm volatile("vpxor %ymm12,%ymm12,%ymm12"); /* Q[2] */ 294 asm volatile("vpxor %ymm14,%ymm14,%ymm14"); /* Q[3] */ 295 296 for (d = 0; d < bytes; d += 128) { 297 for (z = z0; z >= 0; z--) { 298 asm volatile("prefetchnta %0" : : "m" (dptr[z][d])); 299 asm volatile("prefetchnta %0" : : "m" (dptr[z][d+32])); 300 asm volatile("prefetchnta %0" : : "m" (dptr[z][d+64])); 301 asm volatile("prefetchnta %0" : : "m" (dptr[z][d+96])); 302 asm volatile("vpcmpgtb %ymm4,%ymm1,%ymm5"); 303 asm volatile("vpcmpgtb %ymm6,%ymm1,%ymm7"); 304 asm volatile("vpcmpgtb %ymm12,%ymm1,%ymm13"); 305 asm volatile("vpcmpgtb %ymm14,%ymm1,%ymm15"); 306 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 307 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 308 asm volatile("vpaddb %ymm12,%ymm12,%ymm12"); 309 asm volatile("vpaddb %ymm14,%ymm14,%ymm14"); 310 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 311 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 312 asm volatile("vpand %ymm0,%ymm13,%ymm13"); 313 asm volatile("vpand %ymm0,%ymm15,%ymm15"); 314 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 315 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 316 asm volatile("vpxor %ymm13,%ymm12,%ymm12"); 317 asm volatile("vpxor %ymm15,%ymm14,%ymm14"); 318 asm volatile("vmovdqa %0,%%ymm5" : : "m" (dptr[z][d])); 319 asm volatile("vmovdqa %0,%%ymm7" : : "m" (dptr[z][d+32])); 320 asm volatile("vmovdqa %0,%%ymm13" : : "m" (dptr[z][d+64])); 321 asm volatile("vmovdqa %0,%%ymm15" : : "m" (dptr[z][d+96])); 322 asm volatile("vpxor %ymm5,%ymm2,%ymm2"); 323 asm volatile("vpxor %ymm7,%ymm3,%ymm3"); 324 asm volatile("vpxor %ymm13,%ymm10,%ymm10"); 325 asm volatile("vpxor %ymm15,%ymm11,%ymm11"); 326 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 327 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 328 asm volatile("vpxor %ymm13,%ymm12,%ymm12"); 329 asm volatile("vpxor %ymm15,%ymm14,%ymm14"); 330 } 331 asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d])); 332 asm volatile("vpxor %ymm2,%ymm2,%ymm2"); 333 asm volatile("vmovntdq %%ymm3,%0" : "=m" (p[d+32])); 334 asm volatile("vpxor %ymm3,%ymm3,%ymm3"); 335 asm volatile("vmovntdq %%ymm10,%0" : "=m" (p[d+64])); 336 asm volatile("vpxor %ymm10,%ymm10,%ymm10"); 337 asm volatile("vmovntdq %%ymm11,%0" : "=m" (p[d+96])); 338 asm volatile("vpxor %ymm11,%ymm11,%ymm11"); 339 asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d])); 340 asm volatile("vpxor %ymm4,%ymm4,%ymm4"); 341 asm volatile("vmovntdq %%ymm6,%0" : "=m" (q[d+32])); 342 asm volatile("vpxor %ymm6,%ymm6,%ymm6"); 343 asm volatile("vmovntdq %%ymm12,%0" : "=m" (q[d+64])); 344 asm volatile("vpxor %ymm12,%ymm12,%ymm12"); 345 asm volatile("vmovntdq %%ymm14,%0" : "=m" (q[d+96])); 346 asm volatile("vpxor %ymm14,%ymm14,%ymm14"); 347 } 348 349 asm volatile("sfence" : : : "memory"); 350 kernel_fpu_end(); 351 } 352 353 static void raid6_avx24_xor_syndrome(int disks, int start, int stop, 354 size_t bytes, void **ptrs) 355 { 356 u8 **dptr = (u8 **)ptrs; 357 u8 *p, *q; 358 int d, z, z0; 359 360 z0 = stop; /* P/Q right side optimization */ 361 p = dptr[disks-2]; /* XOR parity */ 362 q = dptr[disks-1]; /* RS syndrome */ 363 364 kernel_fpu_begin(); 365 366 asm volatile("vmovdqa %0,%%ymm0" :: "m" (raid6_avx2_constants.x1d[0])); 367 368 for (d = 0 ; d < bytes ; d += 128) { 369 asm volatile("vmovdqa %0,%%ymm4" :: "m" (dptr[z0][d])); 370 asm volatile("vmovdqa %0,%%ymm6" :: "m" (dptr[z0][d+32])); 371 asm volatile("vmovdqa %0,%%ymm12" :: "m" (dptr[z0][d+64])); 372 asm volatile("vmovdqa %0,%%ymm14" :: "m" (dptr[z0][d+96])); 373 asm volatile("vmovdqa %0,%%ymm2" : : "m" (p[d])); 374 asm volatile("vmovdqa %0,%%ymm3" : : "m" (p[d+32])); 375 asm volatile("vmovdqa %0,%%ymm10" : : "m" (p[d+64])); 376 asm volatile("vmovdqa %0,%%ymm11" : : "m" (p[d+96])); 377 asm volatile("vpxor %ymm4,%ymm2,%ymm2"); 378 asm volatile("vpxor %ymm6,%ymm3,%ymm3"); 379 asm volatile("vpxor %ymm12,%ymm10,%ymm10"); 380 asm volatile("vpxor %ymm14,%ymm11,%ymm11"); 381 /* P/Q data pages */ 382 for (z = z0-1 ; z >= start ; z--) { 383 asm volatile("prefetchnta %0" :: "m" (dptr[z][d])); 384 asm volatile("prefetchnta %0" :: "m" (dptr[z][d+64])); 385 asm volatile("vpxor %ymm5,%ymm5,%ymm5"); 386 asm volatile("vpxor %ymm7,%ymm7,%ymm7"); 387 asm volatile("vpxor %ymm13,%ymm13,%ymm13"); 388 asm volatile("vpxor %ymm15,%ymm15,%ymm15"); 389 asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5"); 390 asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7"); 391 asm volatile("vpcmpgtb %ymm12,%ymm13,%ymm13"); 392 asm volatile("vpcmpgtb %ymm14,%ymm15,%ymm15"); 393 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 394 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 395 asm volatile("vpaddb %ymm12,%ymm12,%ymm12"); 396 asm volatile("vpaddb %ymm14,%ymm14,%ymm14"); 397 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 398 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 399 asm volatile("vpand %ymm0,%ymm13,%ymm13"); 400 asm volatile("vpand %ymm0,%ymm15,%ymm15"); 401 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 402 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 403 asm volatile("vpxor %ymm13,%ymm12,%ymm12"); 404 asm volatile("vpxor %ymm15,%ymm14,%ymm14"); 405 asm volatile("vmovdqa %0,%%ymm5" :: "m" (dptr[z][d])); 406 asm volatile("vmovdqa %0,%%ymm7" 407 :: "m" (dptr[z][d+32])); 408 asm volatile("vmovdqa %0,%%ymm13" 409 :: "m" (dptr[z][d+64])); 410 asm volatile("vmovdqa %0,%%ymm15" 411 :: "m" (dptr[z][d+96])); 412 asm volatile("vpxor %ymm5,%ymm2,%ymm2"); 413 asm volatile("vpxor %ymm7,%ymm3,%ymm3"); 414 asm volatile("vpxor %ymm13,%ymm10,%ymm10"); 415 asm volatile("vpxor %ymm15,%ymm11,%ymm11"); 416 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 417 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 418 asm volatile("vpxor %ymm13,%ymm12,%ymm12"); 419 asm volatile("vpxor %ymm15,%ymm14,%ymm14"); 420 } 421 asm volatile("prefetchnta %0" :: "m" (q[d])); 422 asm volatile("prefetchnta %0" :: "m" (q[d+64])); 423 /* P/Q left side optimization */ 424 for (z = start-1 ; z >= 0 ; z--) { 425 asm volatile("vpxor %ymm5,%ymm5,%ymm5"); 426 asm volatile("vpxor %ymm7,%ymm7,%ymm7"); 427 asm volatile("vpxor %ymm13,%ymm13,%ymm13"); 428 asm volatile("vpxor %ymm15,%ymm15,%ymm15"); 429 asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5"); 430 asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7"); 431 asm volatile("vpcmpgtb %ymm12,%ymm13,%ymm13"); 432 asm volatile("vpcmpgtb %ymm14,%ymm15,%ymm15"); 433 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 434 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 435 asm volatile("vpaddb %ymm12,%ymm12,%ymm12"); 436 asm volatile("vpaddb %ymm14,%ymm14,%ymm14"); 437 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 438 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 439 asm volatile("vpand %ymm0,%ymm13,%ymm13"); 440 asm volatile("vpand %ymm0,%ymm15,%ymm15"); 441 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 442 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 443 asm volatile("vpxor %ymm13,%ymm12,%ymm12"); 444 asm volatile("vpxor %ymm15,%ymm14,%ymm14"); 445 } 446 asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d])); 447 asm volatile("vmovntdq %%ymm3,%0" : "=m" (p[d+32])); 448 asm volatile("vmovntdq %%ymm10,%0" : "=m" (p[d+64])); 449 asm volatile("vmovntdq %%ymm11,%0" : "=m" (p[d+96])); 450 asm volatile("vpxor %0,%%ymm4,%%ymm4" : : "m" (q[d])); 451 asm volatile("vpxor %0,%%ymm6,%%ymm6" : : "m" (q[d+32])); 452 asm volatile("vpxor %0,%%ymm12,%%ymm12" : : "m" (q[d+64])); 453 asm volatile("vpxor %0,%%ymm14,%%ymm14" : : "m" (q[d+96])); 454 asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d])); 455 asm volatile("vmovntdq %%ymm6,%0" : "=m" (q[d+32])); 456 asm volatile("vmovntdq %%ymm12,%0" : "=m" (q[d+64])); 457 asm volatile("vmovntdq %%ymm14,%0" : "=m" (q[d+96])); 458 } 459 asm volatile("sfence" : : : "memory"); 460 kernel_fpu_end(); 461 } 462 463 const struct raid6_calls raid6_avx2x4 = { 464 raid6_avx24_gen_syndrome, 465 raid6_avx24_xor_syndrome, 466 raid6_have_avx2, 467 "avx2x4", 468 .priority = 2 /* Prefer AVX2 over priority 1 (SSE2 and others) */ 469 }; 470 #endif /* CONFIG_X86_64 */ 471