hyperentropy.c revision 1.7.2.2
1 1.7.2.2 tls /* $NetBSD: hyperentropy.c,v 1.7.2.2 2014/08/20 00:04:40 tls Exp $ */ 2 1.7.2.2 tls 3 1.7.2.2 tls /* 4 1.7.2.2 tls * Copyright (c) 2014 Antti Kantee. All Rights Reserved. 5 1.7.2.2 tls * 6 1.7.2.2 tls * Redistribution and use in source and binary forms, with or without 7 1.7.2.2 tls * modification, are permitted provided that the following conditions 8 1.7.2.2 tls * are met: 9 1.7.2.2 tls * 1. Redistributions of source code must retain the above copyright 10 1.7.2.2 tls * notice, this list of conditions and the following disclaimer. 11 1.7.2.2 tls * 2. Redistributions in binary form must reproduce the above copyright 12 1.7.2.2 tls * notice, this list of conditions and the following disclaimer in the 13 1.7.2.2 tls * documentation and/or other materials provided with the distribution. 14 1.7.2.2 tls * 15 1.7.2.2 tls * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 1.7.2.2 tls * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 1.7.2.2 tls * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 1.7.2.2 tls * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 1.7.2.2 tls * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 1.7.2.2 tls * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 1.7.2.2 tls * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 1.7.2.2 tls * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 1.7.2.2 tls * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 1.7.2.2 tls * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 1.7.2.2 tls * SUCH DAMAGE. 26 1.7.2.2 tls */ 27 1.7.2.2 tls 28 1.7.2.2 tls #include <sys/cdefs.h> 29 1.7.2.2 tls __KERNEL_RCSID(0, "$NetBSD: hyperentropy.c,v 1.7.2.2 2014/08/20 00:04:40 tls Exp $"); 30 1.7.2.2 tls 31 1.7.2.2 tls #include <sys/param.h> 32 1.7.2.2 tls #include <sys/kmem.h> 33 1.7.2.2 tls #include <sys/rnd.h> 34 1.7.2.2 tls 35 1.7.2.2 tls #include <rump/rumpuser.h> 36 1.7.2.2 tls 37 1.7.2.2 tls #include "rump_private.h" 38 1.7.2.2 tls 39 1.7.2.2 tls static krndsource_t rndsrc; 40 1.7.2.2 tls 41 1.7.2.2 tls #define MAXGET (RND_POOLBITS/NBBY) 42 1.7.2.2 tls static void 43 1.7.2.2 tls feedrandom(size_t bytes, void *arg) 44 1.7.2.2 tls { 45 1.7.2.2 tls uint8_t *rnddata; 46 1.7.2.2 tls size_t dsize; 47 1.7.2.2 tls 48 1.7.2.2 tls rnddata = kmem_intr_alloc(MAXGET, KM_SLEEP); 49 1.7.2.2 tls if (rumpuser_getrandom(rnddata, MIN(MAXGET, bytes), 50 1.7.2.2 tls RUMPUSER_RANDOM_HARD|RUMPUSER_RANDOM_NOWAIT, &dsize) == 0) 51 1.7.2.2 tls rnd_add_data(&rndsrc, rnddata, dsize, NBBY*dsize); 52 1.7.2.2 tls kmem_intr_free(rnddata, MAXGET); 53 1.7.2.2 tls } 54 1.7.2.2 tls 55 1.7.2.2 tls void 56 1.7.2.2 tls rump_hyperentropy_init(void) 57 1.7.2.2 tls { 58 1.7.2.2 tls 59 1.7.2.2 tls if (rump_threads) { 60 1.7.2.2 tls rndsource_setcb(&rndsrc, feedrandom, &rndsrc); 61 1.7.2.2 tls rnd_attach_source(&rndsrc, "rump_hyperent", RND_TYPE_VM, 62 1.7.2.2 tls RND_FLAG_COLLECT_VALUE|RND_FLAG_HASCB); 63 1.7.2.2 tls } else { 64 1.7.2.2 tls /* without threads, just fill the pool */ 65 1.7.2.2 tls rnd_attach_source(&rndsrc, "rump_hyperent", RND_TYPE_VM, 66 1.7.2.2 tls RND_FLAG_COLLECT_VALUE); 67 1.7.2.2 tls feedrandom(RND_POOLBITS/NBBY, NULL); 68 1.7.2.2 tls } 69 1.7.2.2 tls } 70
Indexes created Fri Oct 31 11:10:07 GMT 2025