From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/lib/raid6/mmx.c | 144 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 144 insertions(+) create mode 100644 kernel/lib/raid6/mmx.c (limited to 'kernel/lib/raid6/mmx.c') diff --git a/kernel/lib/raid6/mmx.c b/kernel/lib/raid6/mmx.c new file mode 100644 index 000000000..b3b0e1fcd --- /dev/null +++ b/kernel/lib/raid6/mmx.c @@ -0,0 +1,144 @@ +/* -*- linux-c -*- ------------------------------------------------------- * + * + * Copyright 2002 H. Peter Anvin - All Rights Reserved + * + * 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, Inc., 53 Temple Place Ste 330, + * Boston MA 02111-1307, USA; either version 2 of the License, or + * (at your option) any later version; incorporated herein by reference. + * + * ----------------------------------------------------------------------- */ + +/* + * raid6/mmx.c + * + * MMX implementation of RAID-6 syndrome functions + */ + +#ifdef CONFIG_X86_32 + +#include +#include "x86.h" + +/* Shared with raid6/sse1.c */ +const struct raid6_mmx_constants { + u64 x1d; +} raid6_mmx_constants = { + 0x1d1d1d1d1d1d1d1dULL, +}; + +static int raid6_have_mmx(void) +{ + /* Not really "boot_cpu" but "all_cpus" */ + return boot_cpu_has(X86_FEATURE_MMX); +} + +/* + * Plain MMX implementation + */ +static void raid6_mmx1_gen_syndrome(int disks, size_t bytes, void **ptrs) +{ + u8 **dptr = (u8 **)ptrs; + u8 *p, *q; + int d, z, z0; + + z0 = disks - 3; /* Highest data disk */ + p = dptr[z0+1]; /* XOR parity */ + q = dptr[z0+2]; /* RS syndrome */ + + kernel_fpu_begin(); + + asm volatile("movq %0,%%mm0" : : "m" (raid6_mmx_constants.x1d)); + asm volatile("pxor %mm5,%mm5"); /* Zero temp */ + + for ( d = 0 ; d < bytes ; d += 8 ) { + asm volatile("movq %0,%%mm2" : : "m" (dptr[z0][d])); /* P[0] */ + asm volatile("movq %mm2,%mm4"); /* Q[0] */ + for ( z = z0-1 ; z >= 0 ; z-- ) { + asm volatile("movq %0,%%mm6" : : "m" (dptr[z][d])); + asm volatile("pcmpgtb %mm4,%mm5"); + asm volatile("paddb %mm4,%mm4"); + asm volatile("pand %mm0,%mm5"); + asm volatile("pxor %mm5,%mm4"); + asm volatile("pxor %mm5,%mm5"); + asm volatile("pxor %mm6,%mm2"); + asm volatile("pxor %mm6,%mm4"); + } + asm volatile("movq %%mm2,%0" : "=m" (p[d])); + asm volatile("pxor %mm2,%mm2"); + asm volatile("movq %%mm4,%0" : "=m" (q[d])); + asm volatile("pxor %mm4,%mm4"); + } + + kernel_fpu_end(); +} + +const struct raid6_calls raid6_mmxx1 = { + raid6_mmx1_gen_syndrome, + NULL, /* XOR not yet implemented */ + raid6_have_mmx, + "mmxx1", + 0 +}; + +/* + * Unrolled-by-2 MMX implementation + */ +static void raid6_mmx2_gen_syndrome(int disks, size_t bytes, void **ptrs) +{ + u8 **dptr = (u8 **)ptrs; + u8 *p, *q; + int d, z, z0; + + z0 = disks - 3; /* Highest data disk */ + p = dptr[z0+1]; /* XOR parity */ + q = dptr[z0+2]; /* RS syndrome */ + + kernel_fpu_begin(); + + asm volatile("movq %0,%%mm0" : : "m" (raid6_mmx_constants.x1d)); + asm volatile("pxor %mm5,%mm5"); /* Zero temp */ + asm volatile("pxor %mm7,%mm7"); /* Zero temp */ + + for ( d = 0 ; d < bytes ; d += 16 ) { + asm volatile("movq %0,%%mm2" : : "m" (dptr[z0][d])); /* P[0] */ + asm volatile("movq %0,%%mm3" : : "m" (dptr[z0][d+8])); + asm volatile("movq %mm2,%mm4"); /* Q[0] */ + asm volatile("movq %mm3,%mm6"); /* Q[1] */ + for ( z = z0-1 ; z >= 0 ; z-- ) { + asm volatile("pcmpgtb %mm4,%mm5"); + asm volatile("pcmpgtb %mm6,%mm7"); + asm volatile("paddb %mm4,%mm4"); + asm volatile("paddb %mm6,%mm6"); + asm volatile("pand %mm0,%mm5"); + asm volatile("pand %mm0,%mm7"); + asm volatile("pxor %mm5,%mm4"); + asm volatile("pxor %mm7,%mm6"); + asm volatile("movq %0,%%mm5" : : "m" (dptr[z][d])); + asm volatile("movq %0,%%mm7" : : "m" (dptr[z][d+8])); + asm volatile("pxor %mm5,%mm2"); + asm volatile("pxor %mm7,%mm3"); + asm volatile("pxor %mm5,%mm4"); + asm volatile("pxor %mm7,%mm6"); + asm volatile("pxor %mm5,%mm5"); + asm volatile("pxor %mm7,%mm7"); + } + asm volatile("movq %%mm2,%0" : "=m" (p[d])); + asm volatile("movq %%mm3,%0" : "=m" (p[d+8])); + asm volatile("movq %%mm4,%0" : "=m" (q[d])); + asm volatile("movq %%mm6,%0" : "=m" (q[d+8])); + } + + kernel_fpu_end(); +} + +const struct raid6_calls raid6_mmxx2 = { + raid6_mmx2_gen_syndrome, + NULL, /* XOR not yet implemented */ + raid6_have_mmx, + "mmxx2", + 0 +}; + +#endif -- cgit 1.2.3-korg