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 <asm/fpu/api.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 .gen_syndrome = raid6_avx21_gen_syndrome, 132 .xor_syndrome = raid6_avx21_xor_syndrome, 133 .valid = raid6_have_avx2, 134 .name = "avx2x1", 135 /* Prefer AVX2 over priority 1 (SSE2 and others) */ 136 .priority = 2, 137 }; 138 139 /* 140 * Unrolled-by-2 AVX2 implementation 141 */ 142 static void raid6_avx22_gen_syndrome(int disks, size_t bytes, void **ptrs) 143 { 144 u8 **dptr = (u8 **)ptrs; 145 u8 *p, *q; 146 int d, z, z0; 147 148 z0 = disks - 3; /* Highest data disk */ 149 p = dptr[z0+1]; /* XOR parity */ 150 q = dptr[z0+2]; /* RS syndrome */ 151 152 kernel_fpu_begin(); 153 154 asm volatile("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0])); 155 asm volatile("vpxor %ymm1,%ymm1,%ymm1"); /* Zero temp */ 156 157 /* We uniformly assume a single prefetch covers at least 32 bytes */ 158 for (d = 0; d < bytes; d += 64) { 159 asm volatile("prefetchnta %0" : : "m" (dptr[z0][d])); 160 asm volatile("prefetchnta %0" : : "m" (dptr[z0][d+32])); 161 asm volatile("vmovdqa %0,%%ymm2" : : "m" (dptr[z0][d]));/* P[0] */ 162 asm volatile("vmovdqa %0,%%ymm3" : : "m" (dptr[z0][d+32]));/* P[1] */ 163 asm volatile("vmovdqa %ymm2,%ymm4"); /* Q[0] */ 164 asm volatile("vmovdqa %ymm3,%ymm6"); /* Q[1] */ 165 for (z = z0-1; z >= 0; z--) { 166 asm volatile("prefetchnta %0" : : "m" (dptr[z][d])); 167 asm volatile("prefetchnta %0" : : "m" (dptr[z][d+32])); 168 asm volatile("vpcmpgtb %ymm4,%ymm1,%ymm5"); 169 asm volatile("vpcmpgtb %ymm6,%ymm1,%ymm7"); 170 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 171 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 172 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 173 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 174 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 175 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 176 asm volatile("vmovdqa %0,%%ymm5" : : "m" (dptr[z][d])); 177 asm volatile("vmovdqa %0,%%ymm7" : : "m" (dptr[z][d+32])); 178 asm volatile("vpxor %ymm5,%ymm2,%ymm2"); 179 asm volatile("vpxor %ymm7,%ymm3,%ymm3"); 180 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 181 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 182 } 183 asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d])); 184 asm volatile("vmovntdq %%ymm3,%0" : "=m" (p[d+32])); 185 asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d])); 186 asm volatile("vmovntdq %%ymm6,%0" : "=m" (q[d+32])); 187 } 188 189 asm volatile("sfence" : : : "memory"); 190 kernel_fpu_end(); 191 } 192 193 static void raid6_avx22_xor_syndrome(int disks, int start, int stop, 194 size_t bytes, void **ptrs) 195 { 196 u8 **dptr = (u8 **)ptrs; 197 u8 *p, *q; 198 int d, z, z0; 199 200 z0 = stop; /* P/Q right side optimization */ 201 p = dptr[disks-2]; /* XOR parity */ 202 q = dptr[disks-1]; /* RS syndrome */ 203 204 kernel_fpu_begin(); 205 206 asm volatile("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0])); 207 208 for (d = 0 ; d < bytes ; d += 64) { 209 asm volatile("vmovdqa %0,%%ymm4" :: "m" (dptr[z0][d])); 210 asm volatile("vmovdqa %0,%%ymm6" :: "m" (dptr[z0][d+32])); 211 asm volatile("vmovdqa %0,%%ymm2" : : "m" (p[d])); 212 asm volatile("vmovdqa %0,%%ymm3" : : "m" (p[d+32])); 213 asm volatile("vpxor %ymm4,%ymm2,%ymm2"); 214 asm volatile("vpxor %ymm6,%ymm3,%ymm3"); 215 /* P/Q data pages */ 216 for (z = z0-1 ; z >= start ; z--) { 217 asm volatile("vpxor %ymm5,%ymm5,%ymm5"); 218 asm volatile("vpxor %ymm7,%ymm7,%ymm7"); 219 asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5"); 220 asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7"); 221 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 222 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 223 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 224 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 225 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 226 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 227 asm volatile("vmovdqa %0,%%ymm5" :: "m" (dptr[z][d])); 228 asm volatile("vmovdqa %0,%%ymm7" 229 :: "m" (dptr[z][d+32])); 230 asm volatile("vpxor %ymm5,%ymm2,%ymm2"); 231 asm volatile("vpxor %ymm7,%ymm3,%ymm3"); 232 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 233 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 234 } 235 /* P/Q left side optimization */ 236 for (z = start-1 ; z >= 0 ; z--) { 237 asm volatile("vpxor %ymm5,%ymm5,%ymm5"); 238 asm volatile("vpxor %ymm7,%ymm7,%ymm7"); 239 asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5"); 240 asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7"); 241 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 242 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 243 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 244 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 245 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 246 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 247 } 248 asm volatile("vpxor %0,%%ymm4,%%ymm4" : : "m" (q[d])); 249 asm volatile("vpxor %0,%%ymm6,%%ymm6" : : "m" (q[d+32])); 250 /* Don't use movntdq for r/w memory area < cache line */ 251 asm volatile("vmovdqa %%ymm4,%0" : "=m" (q[d])); 252 asm volatile("vmovdqa %%ymm6,%0" : "=m" (q[d+32])); 253 asm volatile("vmovdqa %%ymm2,%0" : "=m" (p[d])); 254 asm volatile("vmovdqa %%ymm3,%0" : "=m" (p[d+32])); 255 } 256 257 asm volatile("sfence" : : : "memory"); 258 kernel_fpu_end(); 259 } 260 261 const struct raid6_calls raid6_avx2x2 = { 262 .gen_syndrome = raid6_avx22_gen_syndrome, 263 .xor_syndrome = raid6_avx22_xor_syndrome, 264 .valid = raid6_have_avx2, 265 .name = "avx2x2", 266 /* Prefer AVX2 over priority 1 (SSE2 and others) */ 267 .priority = 2, 268 }; 269 270 #ifdef CONFIG_X86_64 271 272 /* 273 * Unrolled-by-4 AVX2 implementation 274 */ 275 static void raid6_avx24_gen_syndrome(int disks, size_t bytes, void **ptrs) 276 { 277 u8 **dptr = (u8 **)ptrs; 278 u8 *p, *q; 279 int d, z, z0; 280 281 z0 = disks - 3; /* Highest data disk */ 282 p = dptr[z0+1]; /* XOR parity */ 283 q = dptr[z0+2]; /* RS syndrome */ 284 285 kernel_fpu_begin(); 286 287 asm volatile("vmovdqa %0,%%ymm0" : : "m" (raid6_avx2_constants.x1d[0])); 288 asm volatile("vpxor %ymm1,%ymm1,%ymm1"); /* Zero temp */ 289 asm volatile("vpxor %ymm2,%ymm2,%ymm2"); /* P[0] */ 290 asm volatile("vpxor %ymm3,%ymm3,%ymm3"); /* P[1] */ 291 asm volatile("vpxor %ymm4,%ymm4,%ymm4"); /* Q[0] */ 292 asm volatile("vpxor %ymm6,%ymm6,%ymm6"); /* Q[1] */ 293 asm volatile("vpxor %ymm10,%ymm10,%ymm10"); /* P[2] */ 294 asm volatile("vpxor %ymm11,%ymm11,%ymm11"); /* P[3] */ 295 asm volatile("vpxor %ymm12,%ymm12,%ymm12"); /* Q[2] */ 296 asm volatile("vpxor %ymm14,%ymm14,%ymm14"); /* Q[3] */ 297 298 for (d = 0; d < bytes; d += 128) { 299 for (z = z0; z >= 0; z--) { 300 asm volatile("prefetchnta %0" : : "m" (dptr[z][d])); 301 asm volatile("prefetchnta %0" : : "m" (dptr[z][d+32])); 302 asm volatile("prefetchnta %0" : : "m" (dptr[z][d+64])); 303 asm volatile("prefetchnta %0" : : "m" (dptr[z][d+96])); 304 asm volatile("vpcmpgtb %ymm4,%ymm1,%ymm5"); 305 asm volatile("vpcmpgtb %ymm6,%ymm1,%ymm7"); 306 asm volatile("vpcmpgtb %ymm12,%ymm1,%ymm13"); 307 asm volatile("vpcmpgtb %ymm14,%ymm1,%ymm15"); 308 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 309 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 310 asm volatile("vpaddb %ymm12,%ymm12,%ymm12"); 311 asm volatile("vpaddb %ymm14,%ymm14,%ymm14"); 312 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 313 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 314 asm volatile("vpand %ymm0,%ymm13,%ymm13"); 315 asm volatile("vpand %ymm0,%ymm15,%ymm15"); 316 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 317 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 318 asm volatile("vpxor %ymm13,%ymm12,%ymm12"); 319 asm volatile("vpxor %ymm15,%ymm14,%ymm14"); 320 asm volatile("vmovdqa %0,%%ymm5" : : "m" (dptr[z][d])); 321 asm volatile("vmovdqa %0,%%ymm7" : : "m" (dptr[z][d+32])); 322 asm volatile("vmovdqa %0,%%ymm13" : : "m" (dptr[z][d+64])); 323 asm volatile("vmovdqa %0,%%ymm15" : : "m" (dptr[z][d+96])); 324 asm volatile("vpxor %ymm5,%ymm2,%ymm2"); 325 asm volatile("vpxor %ymm7,%ymm3,%ymm3"); 326 asm volatile("vpxor %ymm13,%ymm10,%ymm10"); 327 asm volatile("vpxor %ymm15,%ymm11,%ymm11"); 328 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 329 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 330 asm volatile("vpxor %ymm13,%ymm12,%ymm12"); 331 asm volatile("vpxor %ymm15,%ymm14,%ymm14"); 332 } 333 asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d])); 334 asm volatile("vpxor %ymm2,%ymm2,%ymm2"); 335 asm volatile("vmovntdq %%ymm3,%0" : "=m" (p[d+32])); 336 asm volatile("vpxor %ymm3,%ymm3,%ymm3"); 337 asm volatile("vmovntdq %%ymm10,%0" : "=m" (p[d+64])); 338 asm volatile("vpxor %ymm10,%ymm10,%ymm10"); 339 asm volatile("vmovntdq %%ymm11,%0" : "=m" (p[d+96])); 340 asm volatile("vpxor %ymm11,%ymm11,%ymm11"); 341 asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d])); 342 asm volatile("vpxor %ymm4,%ymm4,%ymm4"); 343 asm volatile("vmovntdq %%ymm6,%0" : "=m" (q[d+32])); 344 asm volatile("vpxor %ymm6,%ymm6,%ymm6"); 345 asm volatile("vmovntdq %%ymm12,%0" : "=m" (q[d+64])); 346 asm volatile("vpxor %ymm12,%ymm12,%ymm12"); 347 asm volatile("vmovntdq %%ymm14,%0" : "=m" (q[d+96])); 348 asm volatile("vpxor %ymm14,%ymm14,%ymm14"); 349 } 350 351 asm volatile("sfence" : : : "memory"); 352 kernel_fpu_end(); 353 } 354 355 static void raid6_avx24_xor_syndrome(int disks, int start, int stop, 356 size_t bytes, void **ptrs) 357 { 358 u8 **dptr = (u8 **)ptrs; 359 u8 *p, *q; 360 int d, z, z0; 361 362 z0 = stop; /* P/Q right side optimization */ 363 p = dptr[disks-2]; /* XOR parity */ 364 q = dptr[disks-1]; /* RS syndrome */ 365 366 kernel_fpu_begin(); 367 368 asm volatile("vmovdqa %0,%%ymm0" :: "m" (raid6_avx2_constants.x1d[0])); 369 370 for (d = 0 ; d < bytes ; d += 128) { 371 asm volatile("vmovdqa %0,%%ymm4" :: "m" (dptr[z0][d])); 372 asm volatile("vmovdqa %0,%%ymm6" :: "m" (dptr[z0][d+32])); 373 asm volatile("vmovdqa %0,%%ymm12" :: "m" (dptr[z0][d+64])); 374 asm volatile("vmovdqa %0,%%ymm14" :: "m" (dptr[z0][d+96])); 375 asm volatile("vmovdqa %0,%%ymm2" : : "m" (p[d])); 376 asm volatile("vmovdqa %0,%%ymm3" : : "m" (p[d+32])); 377 asm volatile("vmovdqa %0,%%ymm10" : : "m" (p[d+64])); 378 asm volatile("vmovdqa %0,%%ymm11" : : "m" (p[d+96])); 379 asm volatile("vpxor %ymm4,%ymm2,%ymm2"); 380 asm volatile("vpxor %ymm6,%ymm3,%ymm3"); 381 asm volatile("vpxor %ymm12,%ymm10,%ymm10"); 382 asm volatile("vpxor %ymm14,%ymm11,%ymm11"); 383 /* P/Q data pages */ 384 for (z = z0-1 ; z >= start ; z--) { 385 asm volatile("prefetchnta %0" :: "m" (dptr[z][d])); 386 asm volatile("prefetchnta %0" :: "m" (dptr[z][d+64])); 387 asm volatile("vpxor %ymm5,%ymm5,%ymm5"); 388 asm volatile("vpxor %ymm7,%ymm7,%ymm7"); 389 asm volatile("vpxor %ymm13,%ymm13,%ymm13"); 390 asm volatile("vpxor %ymm15,%ymm15,%ymm15"); 391 asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5"); 392 asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7"); 393 asm volatile("vpcmpgtb %ymm12,%ymm13,%ymm13"); 394 asm volatile("vpcmpgtb %ymm14,%ymm15,%ymm15"); 395 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 396 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 397 asm volatile("vpaddb %ymm12,%ymm12,%ymm12"); 398 asm volatile("vpaddb %ymm14,%ymm14,%ymm14"); 399 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 400 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 401 asm volatile("vpand %ymm0,%ymm13,%ymm13"); 402 asm volatile("vpand %ymm0,%ymm15,%ymm15"); 403 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 404 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 405 asm volatile("vpxor %ymm13,%ymm12,%ymm12"); 406 asm volatile("vpxor %ymm15,%ymm14,%ymm14"); 407 asm volatile("vmovdqa %0,%%ymm5" :: "m" (dptr[z][d])); 408 asm volatile("vmovdqa %0,%%ymm7" 409 :: "m" (dptr[z][d+32])); 410 asm volatile("vmovdqa %0,%%ymm13" 411 :: "m" (dptr[z][d+64])); 412 asm volatile("vmovdqa %0,%%ymm15" 413 :: "m" (dptr[z][d+96])); 414 asm volatile("vpxor %ymm5,%ymm2,%ymm2"); 415 asm volatile("vpxor %ymm7,%ymm3,%ymm3"); 416 asm volatile("vpxor %ymm13,%ymm10,%ymm10"); 417 asm volatile("vpxor %ymm15,%ymm11,%ymm11"); 418 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 419 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 420 asm volatile("vpxor %ymm13,%ymm12,%ymm12"); 421 asm volatile("vpxor %ymm15,%ymm14,%ymm14"); 422 } 423 asm volatile("prefetchnta %0" :: "m" (q[d])); 424 asm volatile("prefetchnta %0" :: "m" (q[d+64])); 425 /* P/Q left side optimization */ 426 for (z = start-1 ; z >= 0 ; z--) { 427 asm volatile("vpxor %ymm5,%ymm5,%ymm5"); 428 asm volatile("vpxor %ymm7,%ymm7,%ymm7"); 429 asm volatile("vpxor %ymm13,%ymm13,%ymm13"); 430 asm volatile("vpxor %ymm15,%ymm15,%ymm15"); 431 asm volatile("vpcmpgtb %ymm4,%ymm5,%ymm5"); 432 asm volatile("vpcmpgtb %ymm6,%ymm7,%ymm7"); 433 asm volatile("vpcmpgtb %ymm12,%ymm13,%ymm13"); 434 asm volatile("vpcmpgtb %ymm14,%ymm15,%ymm15"); 435 asm volatile("vpaddb %ymm4,%ymm4,%ymm4"); 436 asm volatile("vpaddb %ymm6,%ymm6,%ymm6"); 437 asm volatile("vpaddb %ymm12,%ymm12,%ymm12"); 438 asm volatile("vpaddb %ymm14,%ymm14,%ymm14"); 439 asm volatile("vpand %ymm0,%ymm5,%ymm5"); 440 asm volatile("vpand %ymm0,%ymm7,%ymm7"); 441 asm volatile("vpand %ymm0,%ymm13,%ymm13"); 442 asm volatile("vpand %ymm0,%ymm15,%ymm15"); 443 asm volatile("vpxor %ymm5,%ymm4,%ymm4"); 444 asm volatile("vpxor %ymm7,%ymm6,%ymm6"); 445 asm volatile("vpxor %ymm13,%ymm12,%ymm12"); 446 asm volatile("vpxor %ymm15,%ymm14,%ymm14"); 447 } 448 asm volatile("vmovntdq %%ymm2,%0" : "=m" (p[d])); 449 asm volatile("vmovntdq %%ymm3,%0" : "=m" (p[d+32])); 450 asm volatile("vmovntdq %%ymm10,%0" : "=m" (p[d+64])); 451 asm volatile("vmovntdq %%ymm11,%0" : "=m" (p[d+96])); 452 asm volatile("vpxor %0,%%ymm4,%%ymm4" : : "m" (q[d])); 453 asm volatile("vpxor %0,%%ymm6,%%ymm6" : : "m" (q[d+32])); 454 asm volatile("vpxor %0,%%ymm12,%%ymm12" : : "m" (q[d+64])); 455 asm volatile("vpxor %0,%%ymm14,%%ymm14" : : "m" (q[d+96])); 456 asm volatile("vmovntdq %%ymm4,%0" : "=m" (q[d])); 457 asm volatile("vmovntdq %%ymm6,%0" : "=m" (q[d+32])); 458 asm volatile("vmovntdq %%ymm12,%0" : "=m" (q[d+64])); 459 asm volatile("vmovntdq %%ymm14,%0" : "=m" (q[d+96])); 460 } 461 asm volatile("sfence" : : : "memory"); 462 kernel_fpu_end(); 463 } 464 465 const struct raid6_calls raid6_avx2x4 = { 466 .gen_syndrome = raid6_avx24_gen_syndrome, 467 .xor_syndrome = raid6_avx24_xor_syndrome, 468 .valid = raid6_have_avx2, 469 .name = "avx2x4", 470 /* Prefer AVX2 over priority 1 (SSE2 and others) */ 471 .priority = 2, 472 }; 473 #endif /* CONFIG_X86_64 */ 474