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383 lines
9.4 KiB
383 lines
9.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2016 Intel Corporation |
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* |
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* Author: Gayatri Kammela <[email protected]> |
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* Author: Megha Dey <[email protected]> |
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*/ |
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#ifdef CONFIG_AS_AVX512 |
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#include <linux/raid/pq.h> |
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#include "x86.h" |
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static int raid6_has_avx512(void) |
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{ |
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return boot_cpu_has(X86_FEATURE_AVX2) && |
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boot_cpu_has(X86_FEATURE_AVX) && |
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boot_cpu_has(X86_FEATURE_AVX512F) && |
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boot_cpu_has(X86_FEATURE_AVX512BW) && |
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boot_cpu_has(X86_FEATURE_AVX512VL) && |
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boot_cpu_has(X86_FEATURE_AVX512DQ); |
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} |
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static void raid6_2data_recov_avx512(int disks, size_t bytes, int faila, |
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int failb, void **ptrs) |
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{ |
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u8 *p, *q, *dp, *dq; |
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const u8 *pbmul; /* P multiplier table for B data */ |
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const u8 *qmul; /* Q multiplier table (for both) */ |
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const u8 x0f = 0x0f; |
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p = (u8 *)ptrs[disks-2]; |
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q = (u8 *)ptrs[disks-1]; |
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/* |
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* Compute syndrome with zero for the missing data pages |
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* Use the dead data pages as temporary storage for |
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* delta p and delta q |
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*/ |
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dp = (u8 *)ptrs[faila]; |
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ptrs[faila] = (void *)raid6_empty_zero_page; |
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ptrs[disks-2] = dp; |
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dq = (u8 *)ptrs[failb]; |
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ptrs[failb] = (void *)raid6_empty_zero_page; |
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ptrs[disks-1] = dq; |
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raid6_call.gen_syndrome(disks, bytes, ptrs); |
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/* Restore pointer table */ |
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ptrs[faila] = dp; |
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ptrs[failb] = dq; |
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ptrs[disks-2] = p; |
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ptrs[disks-1] = q; |
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/* Now, pick the proper data tables */ |
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pbmul = raid6_vgfmul[raid6_gfexi[failb-faila]]; |
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qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila] ^ |
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raid6_gfexp[failb]]]; |
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kernel_fpu_begin(); |
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/* zmm0 = x0f[16] */ |
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asm volatile("vpbroadcastb %0, %%zmm7" : : "m" (x0f)); |
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while (bytes) { |
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#ifdef CONFIG_X86_64 |
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asm volatile("vmovdqa64 %0, %%zmm1\n\t" |
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"vmovdqa64 %1, %%zmm9\n\t" |
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"vmovdqa64 %2, %%zmm0\n\t" |
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"vmovdqa64 %3, %%zmm8\n\t" |
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"vpxorq %4, %%zmm1, %%zmm1\n\t" |
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"vpxorq %5, %%zmm9, %%zmm9\n\t" |
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"vpxorq %6, %%zmm0, %%zmm0\n\t" |
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"vpxorq %7, %%zmm8, %%zmm8" |
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: |
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: "m" (q[0]), "m" (q[64]), "m" (p[0]), |
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"m" (p[64]), "m" (dq[0]), "m" (dq[64]), |
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"m" (dp[0]), "m" (dp[64])); |
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/* |
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* 1 = dq[0] ^ q[0] |
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* 9 = dq[64] ^ q[64] |
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* 0 = dp[0] ^ p[0] |
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* 8 = dp[64] ^ p[64] |
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*/ |
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asm volatile("vbroadcasti64x2 %0, %%zmm4\n\t" |
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"vbroadcasti64x2 %1, %%zmm5" |
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: |
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: "m" (qmul[0]), "m" (qmul[16])); |
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asm volatile("vpsraw $4, %%zmm1, %%zmm3\n\t" |
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"vpsraw $4, %%zmm9, %%zmm12\n\t" |
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"vpandq %%zmm7, %%zmm1, %%zmm1\n\t" |
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"vpandq %%zmm7, %%zmm9, %%zmm9\n\t" |
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"vpandq %%zmm7, %%zmm3, %%zmm3\n\t" |
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"vpandq %%zmm7, %%zmm12, %%zmm12\n\t" |
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"vpshufb %%zmm9, %%zmm4, %%zmm14\n\t" |
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"vpshufb %%zmm1, %%zmm4, %%zmm4\n\t" |
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"vpshufb %%zmm12, %%zmm5, %%zmm15\n\t" |
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"vpshufb %%zmm3, %%zmm5, %%zmm5\n\t" |
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"vpxorq %%zmm14, %%zmm15, %%zmm15\n\t" |
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"vpxorq %%zmm4, %%zmm5, %%zmm5" |
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: |
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: ); |
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/* |
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* 5 = qx[0] |
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* 15 = qx[64] |
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*/ |
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asm volatile("vbroadcasti64x2 %0, %%zmm4\n\t" |
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"vbroadcasti64x2 %1, %%zmm1\n\t" |
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"vpsraw $4, %%zmm0, %%zmm2\n\t" |
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"vpsraw $4, %%zmm8, %%zmm6\n\t" |
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"vpandq %%zmm7, %%zmm0, %%zmm3\n\t" |
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"vpandq %%zmm7, %%zmm8, %%zmm14\n\t" |
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"vpandq %%zmm7, %%zmm2, %%zmm2\n\t" |
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"vpandq %%zmm7, %%zmm6, %%zmm6\n\t" |
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"vpshufb %%zmm14, %%zmm4, %%zmm12\n\t" |
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"vpshufb %%zmm3, %%zmm4, %%zmm4\n\t" |
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"vpshufb %%zmm6, %%zmm1, %%zmm13\n\t" |
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"vpshufb %%zmm2, %%zmm1, %%zmm1\n\t" |
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"vpxorq %%zmm4, %%zmm1, %%zmm1\n\t" |
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"vpxorq %%zmm12, %%zmm13, %%zmm13" |
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: |
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: "m" (pbmul[0]), "m" (pbmul[16])); |
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/* |
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* 1 = pbmul[px[0]] |
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* 13 = pbmul[px[64]] |
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*/ |
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asm volatile("vpxorq %%zmm5, %%zmm1, %%zmm1\n\t" |
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"vpxorq %%zmm15, %%zmm13, %%zmm13" |
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: |
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: ); |
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/* |
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* 1 = db = DQ |
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* 13 = db[64] = DQ[64] |
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*/ |
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asm volatile("vmovdqa64 %%zmm1, %0\n\t" |
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"vmovdqa64 %%zmm13,%1\n\t" |
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"vpxorq %%zmm1, %%zmm0, %%zmm0\n\t" |
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"vpxorq %%zmm13, %%zmm8, %%zmm8" |
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: |
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: "m" (dq[0]), "m" (dq[64])); |
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asm volatile("vmovdqa64 %%zmm0, %0\n\t" |
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"vmovdqa64 %%zmm8, %1" |
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: |
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: "m" (dp[0]), "m" (dp[64])); |
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bytes -= 128; |
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p += 128; |
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q += 128; |
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dp += 128; |
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dq += 128; |
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#else |
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asm volatile("vmovdqa64 %0, %%zmm1\n\t" |
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"vmovdqa64 %1, %%zmm0\n\t" |
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"vpxorq %2, %%zmm1, %%zmm1\n\t" |
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"vpxorq %3, %%zmm0, %%zmm0" |
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: |
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: "m" (*q), "m" (*p), "m"(*dq), "m" (*dp)); |
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/* 1 = dq ^ q; 0 = dp ^ p */ |
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asm volatile("vbroadcasti64x2 %0, %%zmm4\n\t" |
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"vbroadcasti64x2 %1, %%zmm5" |
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: |
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: "m" (qmul[0]), "m" (qmul[16])); |
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/* |
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* 1 = dq ^ q |
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* 3 = dq ^ p >> 4 |
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*/ |
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asm volatile("vpsraw $4, %%zmm1, %%zmm3\n\t" |
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"vpandq %%zmm7, %%zmm1, %%zmm1\n\t" |
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"vpandq %%zmm7, %%zmm3, %%zmm3\n\t" |
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"vpshufb %%zmm1, %%zmm4, %%zmm4\n\t" |
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"vpshufb %%zmm3, %%zmm5, %%zmm5\n\t" |
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"vpxorq %%zmm4, %%zmm5, %%zmm5" |
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: |
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: ); |
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/* 5 = qx */ |
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asm volatile("vbroadcasti64x2 %0, %%zmm4\n\t" |
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"vbroadcasti64x2 %1, %%zmm1" |
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: |
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: "m" (pbmul[0]), "m" (pbmul[16])); |
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asm volatile("vpsraw $4, %%zmm0, %%zmm2\n\t" |
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"vpandq %%zmm7, %%zmm0, %%zmm3\n\t" |
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"vpandq %%zmm7, %%zmm2, %%zmm2\n\t" |
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"vpshufb %%zmm3, %%zmm4, %%zmm4\n\t" |
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"vpshufb %%zmm2, %%zmm1, %%zmm1\n\t" |
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"vpxorq %%zmm4, %%zmm1, %%zmm1" |
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: |
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: ); |
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/* 1 = pbmul[px] */ |
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asm volatile("vpxorq %%zmm5, %%zmm1, %%zmm1\n\t" |
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/* 1 = db = DQ */ |
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"vmovdqa64 %%zmm1, %0\n\t" |
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: |
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: "m" (dq[0])); |
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asm volatile("vpxorq %%zmm1, %%zmm0, %%zmm0\n\t" |
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"vmovdqa64 %%zmm0, %0" |
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: |
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: "m" (dp[0])); |
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bytes -= 64; |
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p += 64; |
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q += 64; |
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dp += 64; |
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dq += 64; |
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#endif |
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} |
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kernel_fpu_end(); |
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} |
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static void raid6_datap_recov_avx512(int disks, size_t bytes, int faila, |
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void **ptrs) |
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{ |
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u8 *p, *q, *dq; |
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const u8 *qmul; /* Q multiplier table */ |
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const u8 x0f = 0x0f; |
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p = (u8 *)ptrs[disks-2]; |
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q = (u8 *)ptrs[disks-1]; |
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/* |
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* Compute syndrome with zero for the missing data page |
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* Use the dead data page as temporary storage for delta q |
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*/ |
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dq = (u8 *)ptrs[faila]; |
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ptrs[faila] = (void *)raid6_empty_zero_page; |
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ptrs[disks-1] = dq; |
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raid6_call.gen_syndrome(disks, bytes, ptrs); |
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/* Restore pointer table */ |
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ptrs[faila] = dq; |
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ptrs[disks-1] = q; |
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/* Now, pick the proper data tables */ |
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qmul = raid6_vgfmul[raid6_gfinv[raid6_gfexp[faila]]]; |
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kernel_fpu_begin(); |
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asm volatile("vpbroadcastb %0, %%zmm7" : : "m" (x0f)); |
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while (bytes) { |
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#ifdef CONFIG_X86_64 |
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asm volatile("vmovdqa64 %0, %%zmm3\n\t" |
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"vmovdqa64 %1, %%zmm8\n\t" |
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"vpxorq %2, %%zmm3, %%zmm3\n\t" |
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"vpxorq %3, %%zmm8, %%zmm8" |
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: |
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: "m" (dq[0]), "m" (dq[64]), "m" (q[0]), |
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"m" (q[64])); |
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/* |
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* 3 = q[0] ^ dq[0] |
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* 8 = q[64] ^ dq[64] |
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*/ |
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asm volatile("vbroadcasti64x2 %0, %%zmm0\n\t" |
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"vmovapd %%zmm0, %%zmm13\n\t" |
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"vbroadcasti64x2 %1, %%zmm1\n\t" |
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"vmovapd %%zmm1, %%zmm14" |
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: |
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: "m" (qmul[0]), "m" (qmul[16])); |
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asm volatile("vpsraw $4, %%zmm3, %%zmm6\n\t" |
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"vpsraw $4, %%zmm8, %%zmm12\n\t" |
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"vpandq %%zmm7, %%zmm3, %%zmm3\n\t" |
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"vpandq %%zmm7, %%zmm8, %%zmm8\n\t" |
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"vpandq %%zmm7, %%zmm6, %%zmm6\n\t" |
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"vpandq %%zmm7, %%zmm12, %%zmm12\n\t" |
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"vpshufb %%zmm3, %%zmm0, %%zmm0\n\t" |
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"vpshufb %%zmm8, %%zmm13, %%zmm13\n\t" |
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"vpshufb %%zmm6, %%zmm1, %%zmm1\n\t" |
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"vpshufb %%zmm12, %%zmm14, %%zmm14\n\t" |
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"vpxorq %%zmm0, %%zmm1, %%zmm1\n\t" |
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"vpxorq %%zmm13, %%zmm14, %%zmm14" |
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: |
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: ); |
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/* |
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* 1 = qmul[q[0] ^ dq[0]] |
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* 14 = qmul[q[64] ^ dq[64]] |
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*/ |
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asm volatile("vmovdqa64 %0, %%zmm2\n\t" |
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"vmovdqa64 %1, %%zmm12\n\t" |
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"vpxorq %%zmm1, %%zmm2, %%zmm2\n\t" |
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"vpxorq %%zmm14, %%zmm12, %%zmm12" |
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: |
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: "m" (p[0]), "m" (p[64])); |
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/* |
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* 2 = p[0] ^ qmul[q[0] ^ dq[0]] |
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* 12 = p[64] ^ qmul[q[64] ^ dq[64]] |
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*/ |
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asm volatile("vmovdqa64 %%zmm1, %0\n\t" |
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"vmovdqa64 %%zmm14, %1\n\t" |
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"vmovdqa64 %%zmm2, %2\n\t" |
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"vmovdqa64 %%zmm12,%3" |
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: |
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: "m" (dq[0]), "m" (dq[64]), "m" (p[0]), |
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"m" (p[64])); |
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bytes -= 128; |
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p += 128; |
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q += 128; |
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dq += 128; |
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#else |
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asm volatile("vmovdqa64 %0, %%zmm3\n\t" |
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"vpxorq %1, %%zmm3, %%zmm3" |
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: |
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: "m" (dq[0]), "m" (q[0])); |
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/* 3 = q ^ dq */ |
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asm volatile("vbroadcasti64x2 %0, %%zmm0\n\t" |
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"vbroadcasti64x2 %1, %%zmm1" |
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: |
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: "m" (qmul[0]), "m" (qmul[16])); |
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asm volatile("vpsraw $4, %%zmm3, %%zmm6\n\t" |
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"vpandq %%zmm7, %%zmm3, %%zmm3\n\t" |
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"vpandq %%zmm7, %%zmm6, %%zmm6\n\t" |
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"vpshufb %%zmm3, %%zmm0, %%zmm0\n\t" |
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"vpshufb %%zmm6, %%zmm1, %%zmm1\n\t" |
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"vpxorq %%zmm0, %%zmm1, %%zmm1" |
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: |
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: ); |
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/* 1 = qmul[q ^ dq] */ |
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asm volatile("vmovdqa64 %0, %%zmm2\n\t" |
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"vpxorq %%zmm1, %%zmm2, %%zmm2" |
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: |
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: "m" (p[0])); |
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/* 2 = p ^ qmul[q ^ dq] */ |
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asm volatile("vmovdqa64 %%zmm1, %0\n\t" |
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"vmovdqa64 %%zmm2, %1" |
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: |
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: "m" (dq[0]), "m" (p[0])); |
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bytes -= 64; |
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p += 64; |
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q += 64; |
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dq += 64; |
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#endif |
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} |
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kernel_fpu_end(); |
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} |
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const struct raid6_recov_calls raid6_recov_avx512 = { |
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.data2 = raid6_2data_recov_avx512, |
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.datap = raid6_datap_recov_avx512, |
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.valid = raid6_has_avx512, |
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#ifdef CONFIG_X86_64 |
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.name = "avx512x2", |
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#else |
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.name = "avx512x1", |
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#endif |
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.priority = 3, |
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}; |
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#else |
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#warning "your version of binutils lacks AVX512 support" |
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#endif
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