10SN/A/*- 22362SN/A * SPDX-License-Identifier: BSD-2-Clause 30SN/A * 40SN/A * Copyright (c) 2004 Mark R V Murray 50SN/A * All rights reserved. 60SN/A * 72362SN/A * Redistribution and use in source and binary forms, with or without 80SN/A * modification, are permitted provided that the following conditions 92362SN/A * are met: 100SN/A * 1. Redistributions of source code must retain the above copyright 110SN/A * notice, this list of conditions and the following disclaimer 120SN/A * in this position and unchanged. 130SN/A * 2. Redistributions in binary form must reproduce the above copyright 140SN/A * notice, this list of conditions and the following disclaimer in the 150SN/A * documentation and/or other materials provided with the distribution. 160SN/A * 170SN/A * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 180SN/A * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 190SN/A * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 200SN/A * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 212362SN/A * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 222362SN/A * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232362SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 240SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 250SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 260SN/A * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 270SN/A * 2812839Sprr */ 29216SN/A 30216SN/A#include <sys/param.h> 31216SN/A#include <sys/conf.h> 320SN/A#include <sys/fcntl.h> 330SN/A#include <sys/ioccom.h> 340SN/A#include <sys/kernel.h> 350SN/A#include <sys/kerneldump.h> 360SN/A#include <sys/lock.h> 370SN/A#include <sys/malloc.h> 380SN/A#include <sys/memrange.h> 390SN/A#include <sys/module.h> 400SN/A#include <sys/mutex.h> 410SN/A#include <sys/priv.h> 420SN/A#include <sys/proc.h> 430SN/A#include <sys/signalvar.h> 440SN/A#include <sys/systm.h> 450SN/A#include <sys/uio.h> 460SN/A 470SN/A#include <vm/vm.h> 480SN/A#include <vm/vm_param.h> 490SN/A#include <vm/pmap.h> 500SN/A#include <vm/vm_map.h> 510SN/A#include <vm/vm_object.h> 520SN/A#include <vm/vm_page.h> 530SN/A#include <vm/vm_phys.h> 540SN/A 550SN/A#include <machine/memdev.h> 560SN/A 570SN/Astatic struct cdev *memdev, *kmemdev; 580SN/A 590SN/Astatic d_ioctl_t memioctl; 600SN/A 610SN/Astatic struct cdevsw mem_cdevsw = { 620SN/A .d_version = D_VERSION, 630SN/A .d_flags = D_MEM, 640SN/A .d_open = memopen, 650SN/A .d_read = memrw, 660SN/A .d_write = memrw, 670SN/A .d_ioctl = memioctl, 680SN/A .d_mmap = memmmap, 690SN/A .d_name = "mem", 700SN/A}; 710SN/A 720SN/A/* ARGSUSED */ 730SN/Aint 740SN/Amemopen(struct cdev *dev __unused, int flags, int fmt __unused, 750SN/A struct thread *td) 760SN/A{ 770SN/A int error = 0; 780SN/A 790SN/A if (flags & FREAD) 800SN/A error = priv_check(td, PRIV_KMEM_READ); 810SN/A if (flags & FWRITE) { 820SN/A if (error == 0) 830SN/A error = priv_check(td, PRIV_KMEM_WRITE); 840SN/A if (error == 0) 850SN/A error = securelevel_gt(td->td_ucred, 0); 860SN/A } 870SN/A 880SN/A return (error); 890SN/A} 900SN/A 910SN/Astatic int 920SN/Amemioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, 930SN/A struct thread *td) 940SN/A{ 950SN/A vm_map_t map; 960SN/A vm_map_entry_t entry; 970SN/A const struct mem_livedump_arg *marg; 980SN/A struct mem_extract *me; 990SN/A int error; 1000SN/A 1010SN/A error = 0; 1020SN/A switch (cmd) { 1030SN/A case MEM_EXTRACT_PADDR: 1040SN/A me = (struct mem_extract *)data; 1050SN/A 1060SN/A map = &td->td_proc->p_vmspace->vm_map; 1070SN/A vm_map_lock_read(map); 1080SN/A if (vm_map_lookup_entry(map, me->me_vaddr, &entry)) { 1090SN/A me->me_paddr = pmap_extract( 1100SN/A &td->td_proc->p_vmspace->vm_pmap, me->me_vaddr); 1110SN/A if (me->me_paddr != 0) { 1120SN/A me->me_state = ME_STATE_MAPPED; 1130SN/A me->me_domain = vm_phys_domain(me->me_paddr); 1140SN/A } else { 1150SN/A me->me_state = ME_STATE_VALID; 1160SN/A } 1170SN/A } else { 1180SN/A me->me_state = ME_STATE_INVALID; 1190SN/A } 1200SN/A vm_map_unlock_read(map); 1210SN/A break; 1220SN/A case MEM_KERNELDUMP: 1230SN/A marg = (const struct mem_livedump_arg *)data; 1240SN/A error = livedump_start(marg->fd, marg->flags, marg->compression); 1250SN/A break; 1260SN/A default: 1270SN/A error = memioctl_md(dev, cmd, data, flags, td); 1280SN/A break; 1290SN/A } 1300SN/A return (error); 1310SN/A} 1320SN/A 1330SN/A/* ARGSUSED */ 1340SN/Astatic int 1350SN/Amem_modevent(module_t mod __unused, int type, void *data __unused) 1360SN/A{ 1370SN/A switch(type) { 138 case MOD_LOAD: 139 if (bootverbose) 140 printf("mem: <memory>\n"); 141 mem_range_init(); 142 memdev = make_dev(&mem_cdevsw, CDEV_MINOR_MEM, 143 UID_ROOT, GID_KMEM, 0640, "mem"); 144 kmemdev = make_dev(&mem_cdevsw, CDEV_MINOR_KMEM, 145 UID_ROOT, GID_KMEM, 0640, "kmem"); 146 break; 147 148 case MOD_UNLOAD: 149 mem_range_destroy(); 150 destroy_dev(memdev); 151 destroy_dev(kmemdev); 152 break; 153 154 case MOD_SHUTDOWN: 155 break; 156 157 default: 158 return(EOPNOTSUPP); 159 } 160 161 return (0); 162} 163 164DEV_MODULE(mem, mem_modevent, NULL); 165MODULE_VERSION(mem, 1); 166