vkernel64 - Raise the memory requirements to 64MB.
[dragonfly.git] / sys / platform / vkernel64 / platform / init.c
CommitLineData
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1/*
2 * Copyright (c) 2006 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $DragonFly: src/sys/platform/vkernel/platform/init.c,v 1.56 2008/05/27 07:48:00 dillon Exp $
35 */
36
37#include <sys/types.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40#include <sys/stat.h>
41#include <sys/mman.h>
42#include <sys/cons.h>
43#include <sys/random.h>
44#include <sys/vkernel.h>
45#include <sys/tls.h>
46#include <sys/reboot.h>
47#include <sys/proc.h>
48#include <sys/msgbuf.h>
49#include <sys/vmspace.h>
50#include <sys/socket.h>
51#include <sys/sockio.h>
52#include <sys/sysctl.h>
53#include <sys/un.h>
54#include <vm/vm_page.h>
e130cdcb 55#include <sys/mplock2.h>
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56
57#include <machine/cpu.h>
58#include <machine/globaldata.h>
59#include <machine/tls.h>
60#include <machine/md_var.h>
61#include <machine/vmparam.h>
62#include <cpu/specialreg.h>
63
64#include <net/if.h>
65#include <net/if_arp.h>
66#include <net/ethernet.h>
67#include <net/bridge/if_bridgevar.h>
68#include <netinet/in.h>
69#include <arpa/inet.h>
70
71#include <stdio.h>
72#include <stdlib.h>
73#include <stdarg.h>
278c4e67 74#include <stdbool.h>
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75#include <unistd.h>
76#include <fcntl.h>
77#include <string.h>
78#include <err.h>
79#include <errno.h>
80#include <assert.h>
278c4e67 81#include <sysexits.h>
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82
83vm_paddr_t phys_avail[16];
84vm_paddr_t Maxmem;
85vm_paddr_t Maxmem_bytes;
39d69dae 86long physmem;
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87int MemImageFd = -1;
88struct vkdisk_info DiskInfo[VKDISK_MAX];
89int DiskNum;
90struct vknetif_info NetifInfo[VKNETIF_MAX];
91int NetifNum;
92char *pid_file;
93vm_offset_t KvaStart;
94vm_offset_t KvaEnd;
95vm_offset_t KvaSize;
96vm_offset_t virtual_start;
97vm_offset_t virtual_end;
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SW
98vm_offset_t virtual2_start;
99vm_offset_t virtual2_end;
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100vm_offset_t kernel_vm_end;
101vm_offset_t crashdumpmap;
102vm_offset_t clean_sva;
103vm_offset_t clean_eva;
104struct msgbuf *msgbufp;
105caddr_t ptvmmap;
106vpte_t *KernelPTD;
107vpte_t *KernelPTA; /* Warning: Offset for direct VA translation */
108void *dmap_min_address;
109u_int cpu_feature; /* XXX */
110int tsc_present;
111int64_t tsc_frequency;
112int optcpus; /* number of cpus - see mp_start() */
113int lwp_cpu_lock; /* if/how to lock virtual CPUs to real CPUs */
114int real_ncpus; /* number of real CPUs */
115int next_cpu; /* next real CPU to lock a virtual CPU to */
116
117struct privatespace *CPU_prvspace;
118
119static struct trapframe proc0_tf;
120static void *proc0paddr;
121
122static void init_sys_memory(char *imageFile);
123static void init_kern_memory(void);
124static void init_globaldata(void);
125static void init_vkernel(void);
126static void init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type);
127static void init_netif(char *netifExp[], int netifFileNum);
278c4e67
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128static void writepid(void);
129static void cleanpid(void);
da673940 130static int unix_connect(const char *path);
278c4e67
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131static void usage_err(const char *ctl, ...);
132static void usage_help(_Bool);
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133
134static int save_ac;
135static char **save_av;
136
137/*
138 * Kernel startup for virtual kernels - standard main()
139 */
140int
141main(int ac, char **av)
142{
143 char *memImageFile = NULL;
144 char *netifFile[VKNETIF_MAX];
145 char *diskFile[VKDISK_MAX];
146 char *cdFile[VKDISK_MAX];
147 char *suffix;
148 char *endp;
149 int netifFileNum = 0;
150 int diskFileNum = 0;
151 int cdFileNum = 0;
152 int bootOnDisk = -1; /* set below to vcd (0) or vkd (1) */
153 int c;
154 int i;
155 int j;
156 int n;
157 int isq;
158 int real_vkernel_enable;
159 int supports_sse;
160 size_t vsize;
161
162 save_ac = ac;
163 save_av = av;
164
165 /*
166 * Process options
167 */
168 kernel_mem_readonly = 1;
169#ifdef SMP
170 optcpus = 2;
171#endif
172 lwp_cpu_lock = LCL_NONE;
173
174 real_vkernel_enable = 0;
175 vsize = sizeof(real_vkernel_enable);
176 sysctlbyname("vm.vkernel_enable", &real_vkernel_enable, &vsize, NULL,0);
177
178 if (real_vkernel_enable == 0) {
179 errx(1, "vm.vkernel_enable is 0, must be set "
180 "to 1 to execute a vkernel!");
181 }
182
183 real_ncpus = 1;
184 vsize = sizeof(real_ncpus);
185 sysctlbyname("hw.ncpu", &real_ncpus, &vsize, NULL, 0);
186
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187 if (ac < 2)
188 usage_help(false);
189
190 while ((c = getopt(ac, av, "c:hsvl:m:n:r:e:i:p:I:U")) != -1) {
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191 switch(c) {
192 case 'e':
193 /*
194 * name=value:name=value:name=value...
195 * name="value"...
196 *
197 * Allow values to be quoted but note that shells
198 * may remove the quotes, so using this feature
199 * to embed colons may require a backslash.
200 */
201 n = strlen(optarg);
202 isq = 0;
203 kern_envp = malloc(n + 2);
204 for (i = j = 0; i < n; ++i) {
205 if (optarg[i] == '"')
206 isq ^= 1;
207 else if (optarg[i] == '\'')
208 isq ^= 2;
209 else if (isq == 0 && optarg[i] == ':')
210 kern_envp[j++] = 0;
211 else
212 kern_envp[j++] = optarg[i];
213 }
214 kern_envp[j++] = 0;
215 kern_envp[j++] = 0;
216 break;
217 case 's':
218 boothowto |= RB_SINGLE;
219 break;
220 case 'v':
221 bootverbose = 1;
222 break;
223 case 'i':
224 memImageFile = optarg;
225 break;
226 case 'I':
227 if (netifFileNum < VKNETIF_MAX)
228 netifFile[netifFileNum++] = strdup(optarg);
229 break;
230 case 'r':
231 if (bootOnDisk < 0)
232 bootOnDisk = 1;
233 if (diskFileNum + cdFileNum < VKDISK_MAX)
234 diskFile[diskFileNum++] = strdup(optarg);
235 break;
236 case 'c':
237 if (bootOnDisk < 0)
238 bootOnDisk = 0;
239 if (diskFileNum + cdFileNum < VKDISK_MAX)
240 cdFile[cdFileNum++] = strdup(optarg);
241 break;
242 case 'm':
243 Maxmem_bytes = strtoull(optarg, &suffix, 0);
244 if (suffix) {
245 switch(*suffix) {
246 case 'g':
247 case 'G':
248 Maxmem_bytes <<= 30;
249 break;
250 case 'm':
251 case 'M':
252 Maxmem_bytes <<= 20;
253 break;
254 case 'k':
255 case 'K':
256 Maxmem_bytes <<= 10;
257 break;
258 default:
259 Maxmem_bytes = 0;
278c4e67 260 usage_err("Bad maxmem option");
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261 /* NOT REACHED */
262 break;
263 }
264 }
265 break;
266 case 'l':
267 next_cpu = -1;
268 if (strncmp("map", optarg, 3) == 0) {
269 lwp_cpu_lock = LCL_PER_CPU;
270 if (optarg[3] == ',') {
271 next_cpu = strtol(optarg+4, &endp, 0);
272 if (*endp != '\0')
278c4e67 273 usage_err("Bad target CPU number at '%s'", endp);
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274 } else {
275 next_cpu = 0;
276 }
277 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
278c4e67 278 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
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279 } else if (strncmp("any", optarg, 3) == 0) {
280 lwp_cpu_lock = LCL_NONE;
281 } else {
282 lwp_cpu_lock = LCL_SINGLE_CPU;
283 next_cpu = strtol(optarg, &endp, 0);
284 if (*endp != '\0')
278c4e67 285 usage_err("Bad target CPU number at '%s'", endp);
da673940 286 if (next_cpu < 0 || next_cpu > real_ncpus - 1)
278c4e67 287 usage_err("Bad target CPU, valid range is 0-%d", real_ncpus - 1);
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288 }
289 break;
290 case 'n':
291 /*
292 * This value is set up by mp_start(), don't just
293 * set ncpus here.
294 */
295#ifdef SMP
296 optcpus = strtol(optarg, NULL, 0);
297 if (optcpus < 1 || optcpus > MAXCPU)
278c4e67 298 usage_err("Bad ncpus, valid range is 1-%d", MAXCPU);
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299#else
300 if (strtol(optarg, NULL, 0) != 1) {
278c4e67 301 usage_err("You built a UP vkernel, only 1 cpu!");
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302 }
303#endif
304
305 break;
306 case 'p':
307 pid_file = optarg;
308 break;
309 case 'U':
310 kernel_mem_readonly = 0;
311 break;
278c4e67
SG
312 case 'h':
313 usage_help(true);
314 break;
278c4e67
SG
315 default:
316 usage_help(false);
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317 }
318 }
319
320 writepid();
321 cpu_disable_intr();
322 init_sys_memory(memImageFile);
323 init_kern_memory();
324 init_globaldata();
325 init_vkernel();
326 setrealcpu();
327 init_kqueue();
328
329 /*
330 * Check TSC
331 */
332 vsize = sizeof(tsc_present);
333 sysctlbyname("hw.tsc_present", &tsc_present, &vsize, NULL, 0);
334 vsize = sizeof(tsc_frequency);
335 sysctlbyname("hw.tsc_frequency", &tsc_frequency, &vsize, NULL, 0);
336 if (tsc_present)
337 cpu_feature |= CPUID_TSC;
338
339 /*
340 * Check SSE
341 */
342 vsize = sizeof(supports_sse);
343 supports_sse = 0;
344 sysctlbyname("hw.instruction_sse", &supports_sse, &vsize, NULL, 0);
345 init_fpu(supports_sse);
346 if (supports_sse)
347 cpu_feature |= CPUID_SSE | CPUID_FXSR;
348
349 /*
350 * We boot from the first installed disk.
351 */
352 if (bootOnDisk == 1) {
353 init_disk(diskFile, diskFileNum, VKD_DISK);
354 init_disk(cdFile, cdFileNum, VKD_CD);
355 } else {
356 init_disk(cdFile, cdFileNum, VKD_CD);
357 init_disk(diskFile, diskFileNum, VKD_DISK);
358 }
359 init_netif(netifFile, netifFileNum);
360 init_exceptions();
361 mi_startup();
362 /* NOT REACHED */
278c4e67 363 exit(EX_SOFTWARE);
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364}
365
366/*
367 * Initialize system memory. This is the virtual kernel's 'RAM'.
368 */
369static
370void
371init_sys_memory(char *imageFile)
372{
373 struct stat st;
374 int i;
375 int fd;
376
377 /*
378 * Figure out the system memory image size. If an image file was
379 * specified and -m was not specified, use the image file's size.
380 */
381
382 if (imageFile && stat(imageFile, &st) == 0 && Maxmem_bytes == 0)
383 Maxmem_bytes = (vm_paddr_t)st.st_size;
384 if ((imageFile == NULL || stat(imageFile, &st) < 0) &&
385 Maxmem_bytes == 0) {
376264e3 386 errx(1, "Cannot create new memory file %s unless "
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387 "system memory size is specified with -m",
388 imageFile);
389 /* NOT REACHED */
390 }
391
392 /*
393 * Maxmem must be known at this time
394 */
242e00e6
AHJ
395 if (Maxmem_bytes < 64 * 1024 * 1024 || (Maxmem_bytes & SEG_MASK)) {
396 errx(1, "Bad maxmem specification: 64MB minimum, "
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397 "multiples of %dMB only",
398 SEG_SIZE / 1024 / 1024);
399 /* NOT REACHED */
400 }
401
402 /*
403 * Generate an image file name if necessary, then open/create the
404 * file exclusively locked. Do not allow multiple virtual kernels
405 * to use the same image file.
406 */
407 if (imageFile == NULL) {
408 for (i = 0; i < 1000000; ++i) {
409 asprintf(&imageFile, "/var/vkernel/memimg.%06d", i);
410 fd = open(imageFile,
411 O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
412 if (fd < 0 && errno == EWOULDBLOCK) {
413 free(imageFile);
414 continue;
415 }
416 break;
417 }
418 } else {
419 fd = open(imageFile, O_RDWR|O_CREAT|O_EXLOCK|O_NONBLOCK, 0644);
420 }
421 fprintf(stderr, "Using memory file: %s\n", imageFile);
422 if (fd < 0 || fstat(fd, &st) < 0) {
423 err(1, "Unable to open/create %s", imageFile);
424 /* NOT REACHED */
425 }
426
427 /*
b72e51d1
MD
428 * Truncate or extend the file as necessary. Clean out the contents
429 * of the file, we want it to be full of holes so we don't waste
430 * time reading in data from an old file that we no longer care
431 * about.
da673940 432 */
b72e51d1
MD
433 ftruncate(fd, 0);
434 ftruncate(fd, Maxmem_bytes);
da673940 435
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436 MemImageFd = fd;
437 Maxmem = Maxmem_bytes >> PAGE_SHIFT;
9f90716f 438 physmem = Maxmem;
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439}
440
441/*
442 * Initialize kernel memory. This reserves kernel virtual memory by using
443 * MAP_VPAGETABLE
444 */
445
446static
447void
448init_kern_memory(void)
449{
450 void *base;
451 void *try;
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452 char dummy;
453 char *topofstack = &dummy;
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454 int i;
455 void *firstfree;
456
457 /*
458 * Memory map our kernel virtual memory space. Note that the
459 * kernel image itself is not made part of this memory for the
460 * moment.
461 *
462 * The memory map must be segment-aligned so we can properly
463 * offset KernelPTD.
464 *
465 * If the system kernel has a different MAXDSIZ, it might not
466 * be possible to map kernel memory in its prefered location.
467 * Try a number of different locations.
468 */
469 try = (void *)(512UL << 30);
470 base = NULL;
471 while ((char *)try + KERNEL_KVA_SIZE < topofstack) {
472 base = mmap(try, KERNEL_KVA_SIZE, PROT_READ|PROT_WRITE,
473 MAP_FILE|MAP_SHARED|MAP_VPAGETABLE,
2c2e847c 474 MemImageFd, (off_t)try);
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475 if (base == try)
476 break;
477 if (base != MAP_FAILED)
478 munmap(base, KERNEL_KVA_SIZE);
479 try = (char *)try + (512UL << 30);
480 }
481 if (base != try) {
482 err(1, "Unable to mmap() kernel virtual memory!");
483 /* NOT REACHED */
484 }
485 madvise(base, KERNEL_KVA_SIZE, MADV_NOSYNC);
486 KvaStart = (vm_offset_t)base;
487 KvaSize = KERNEL_KVA_SIZE;
488 KvaEnd = KvaStart + KvaSize;
d4f5f27c
MD
489
490 /* cannot use kprintf yet */
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491 printf("KVM mapped at %p-%p\n", (void *)KvaStart, (void *)KvaEnd);
492
493 /* MAP_FILE? */
494 dmap_min_address = mmap(0, DMAP_SIZE, PROT_READ|PROT_WRITE,
495 MAP_NOCORE|MAP_NOSYNC|MAP_SHARED,
496 MemImageFd, 0);
497 if (dmap_min_address == MAP_FAILED) {
498 err(1, "Unable to mmap() kernel DMAP region!");
499 /* NOT REACHED */
500 }
501
502 firstfree = 0;
2c2e847c 503 pmap_bootstrap((vm_paddr_t *)&firstfree, (int64_t)base);
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504
505 mcontrol(base, KERNEL_KVA_SIZE, MADV_SETMAP,
506 0 | VPTE_R | VPTE_W | VPTE_V);
507
508 /*
509 * phys_avail[] represents unallocated physical memory. MI code
510 * will use phys_avail[] to create the vm_page array.
511 */
2c2e847c 512 phys_avail[0] = (vm_paddr_t)firstfree;
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513 phys_avail[0] = (phys_avail[0] + PAGE_MASK) & ~(vm_paddr_t)PAGE_MASK;
514 phys_avail[1] = Maxmem_bytes;
515
516#if JGV
517 /*
518 * (virtual_start, virtual_end) represent unallocated kernel virtual
519 * memory. MI code will create kernel_map using these parameters.
520 */
521 virtual_start = KvaStart + (long)firstfree;
522 virtual_start = (virtual_start + PAGE_MASK) & ~(vm_offset_t)PAGE_MASK;
523 virtual_end = KvaStart + KERNEL_KVA_SIZE;
524#endif
525
526 /*
527 * pmap_growkernel() will set the correct value.
528 */
529 kernel_vm_end = 0;
530
531 /*
532 * Allocate space for process 0's UAREA.
533 */
534 proc0paddr = (void *)virtual_start;
535 for (i = 0; i < UPAGES; ++i) {
536 pmap_kenter_quick(virtual_start, phys_avail[0]);
537 virtual_start += PAGE_SIZE;
538 phys_avail[0] += PAGE_SIZE;
539 }
540
541 /*
542 * crashdumpmap
543 */
544 crashdumpmap = virtual_start;
545 virtual_start += MAXDUMPPGS * PAGE_SIZE;
546
547 /*
548 * msgbufp maps the system message buffer
549 */
550 assert((MSGBUF_SIZE & PAGE_MASK) == 0);
551 msgbufp = (void *)virtual_start;
552 for (i = 0; i < (MSGBUF_SIZE >> PAGE_SHIFT); ++i) {
553 pmap_kenter_quick(virtual_start, phys_avail[0]);
554 virtual_start += PAGE_SIZE;
555 phys_avail[0] += PAGE_SIZE;
556 }
557 msgbufinit(msgbufp, MSGBUF_SIZE);
558
559 /*
560 * used by kern_memio for /dev/mem access
561 */
562 ptvmmap = (caddr_t)virtual_start;
563 virtual_start += PAGE_SIZE;
564
565 /*
566 * Bootstrap the kernel_pmap
567 */
568#if JGV
569 pmap_bootstrap();
570#endif
571}
572
573/*
574 * Map the per-cpu globaldata for cpu #0. Allocate the space using
575 * virtual_start and phys_avail[0]
576 */
577static
578void
579init_globaldata(void)
580{
581 int i;
582 vm_paddr_t pa;
583 vm_offset_t va;
584
585 /*
586 * Reserve enough KVA to cover possible cpus. This is a considerable
587 * amount of KVA since the privatespace structure includes two
588 * whole page table mappings.
589 */
590 virtual_start = (virtual_start + SEG_MASK) & ~(vm_offset_t)SEG_MASK;
591 CPU_prvspace = (void *)virtual_start;
592 virtual_start += sizeof(struct privatespace) * SMP_MAXCPU;
593
594 /*
595 * Allocate enough physical memory to cover the mdglobaldata
596 * portion of the space and the idle stack and map the pages
597 * into KVA. For cpu #0 only.
598 */
599 for (i = 0; i < sizeof(struct mdglobaldata); i += PAGE_SIZE) {
600 pa = phys_avail[0];
601 va = (vm_offset_t)&CPU_prvspace[0].mdglobaldata + i;
602 pmap_kenter_quick(va, pa);
603 phys_avail[0] += PAGE_SIZE;
604 }
605 for (i = 0; i < sizeof(CPU_prvspace[0].idlestack); i += PAGE_SIZE) {
606 pa = phys_avail[0];
607 va = (vm_offset_t)&CPU_prvspace[0].idlestack + i;
608 pmap_kenter_quick(va, pa);
609 phys_avail[0] += PAGE_SIZE;
610 }
611
612 /*
613 * Setup the %gs for cpu #0. The mycpu macro works after this
614 * point. Note that %fs is used by pthreads.
615 */
616 tls_set_gs(&CPU_prvspace[0], sizeof(struct privatespace));
617}
618
619/*
620 * Initialize very low level systems including thread0, proc0, etc.
621 */
622static
623void
624init_vkernel(void)
625{
626 struct mdglobaldata *gd;
627
628 gd = &CPU_prvspace[0].mdglobaldata;
629 bzero(gd, sizeof(*gd));
630
631 gd->mi.gd_curthread = &thread0;
632 thread0.td_gd = &gd->mi;
633 ncpus = 1;
634 ncpus2 = 1; /* rounded down power of 2 */
635 ncpus_fit = 1; /* rounded up power of 2 */
636 /* ncpus2_mask and ncpus_fit_mask are 0 */
637 init_param1();
638 gd->mi.gd_prvspace = &CPU_prvspace[0];
639 mi_gdinit(&gd->mi, 0);
640 cpu_gdinit(gd, 0);
641 mi_proc0init(&gd->mi, proc0paddr);
642 lwp0.lwp_md.md_regs = &proc0_tf;
643
644 /*init_locks();*/
e130cdcb
MD
645#ifdef SMP
646 /*
647 * Get the initial mplock with a count of 1 for the BSP.
648 * This uses a LOGICAL cpu ID, ie BSP == 0.
649 */
650 cpu_get_initial_mplock();
651#endif
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652 cninit();
653 rand_initialize();
654#if 0 /* #ifdef DDB */
655 kdb_init();
656 if (boothowto & RB_KDB)
657 Debugger("Boot flags requested debugger");
658#endif
659 identcpu();
660#if 0
661 initializecpu(); /* Initialize CPU registers */
662#endif
663 init_param2((phys_avail[1] - phys_avail[0]) / PAGE_SIZE);
664
665#if 0
666 /*
667 * Map the message buffer
668 */
669 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
670 pmap_kenter((vm_offset_t)msgbufp + off, avail_end + off);
671 msgbufinit(msgbufp, MSGBUF_SIZE);
672#endif
673#if 0
674 thread0.td_pcb_cr3 ... MMU
675 lwp0.lwp_md.md_regs = &proc0_tf;
676#endif
677}
678
679/*
680 * Filesystem image paths for the virtual kernel are optional.
681 * If specified they each should point to a disk image,
682 * the first of which will become the root disk.
683 *
684 * The virtual kernel caches data from our 'disk' just like a normal kernel,
685 * so we do not really want the real kernel to cache the data too. Use
686 * O_DIRECT to remove the duplication.
687 */
688static
689void
690init_disk(char *diskExp[], int diskFileNum, enum vkdisk_type type)
691{
692 int i;
693
694 if (diskFileNum == 0)
695 return;
696
697 for(i=0; i < diskFileNum; i++){
698 char *fname;
699 fname = diskExp[i];
700
701 if (fname == NULL) {
702 warnx("Invalid argument to '-r'");
703 continue;
704 }
705
706 if (DiskNum < VKDISK_MAX) {
707 struct stat st;
708 struct vkdisk_info* info = NULL;
709 int fd;
710 size_t l = 0;
711
712 if (type == VKD_DISK)
6882b7a5 713 fd = open(fname, O_RDWR|O_DIRECT, 0644);
da673940
JG
714 else
715 fd = open(fname, O_RDONLY|O_DIRECT, 0644);
716 if (fd < 0 || fstat(fd, &st) < 0) {
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JG
717 err(1, "Unable to open/create %s", fname);
718 /* NOT REACHED */
719 }
6882b7a5
MD
720 if (S_ISREG(st.st_mode)) {
721 if (flock(fd, LOCK_EX|LOCK_NB) < 0) {
722 errx(1, "Disk image %s is already "
723 "in use\n", fname);
724 /* NOT REACHED */
725 }
726 }
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JG
727
728 info = &DiskInfo[DiskNum];
729 l = strlen(fname);
730
731 info->unit = i;
732 info->fd = fd;
733 info->type = type;
734 memcpy(info->fname, fname, l);
735
736 if (DiskNum == 0) {
737 if (type == VKD_CD) {
738 rootdevnames[0] = "cd9660:vcd0a";
739 } else if (type == VKD_DISK) {
740 rootdevnames[0] = "ufs:vkd0s0a";
741 rootdevnames[1] = "ufs:vkd0s1a";
742 }
743 }
744
745 DiskNum++;
746 } else {
747 warnx("vkd%d (%s) > VKDISK_MAX", DiskNum, fname);
748 continue;
749 }
750 }
751}
752
753static
754int
755netif_set_tapflags(int tap_unit, int f, int s)
756{
757 struct ifreq ifr;
758 int flags;
759
760 bzero(&ifr, sizeof(ifr));
761
762 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
763 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
764 warn("tap%d: ioctl(SIOCGIFFLAGS) failed", tap_unit);
765 return -1;
766 }
767
768 /*
769 * Adjust if_flags
770 *
771 * If the flags are already set/cleared, then we return
772 * immediately to avoid extra syscalls
773 */
774 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
775 if (f < 0) {
776 /* Turn off flags */
777 f = -f;
778 if ((flags & f) == 0)
779 return 0;
780 flags &= ~f;
781 } else {
782 /* Turn on flags */
783 if (flags & f)
784 return 0;
785 flags |= f;
786 }
787
788 /*
789 * Fix up ifreq.ifr_name, since it may be trashed
790 * in previous ioctl(SIOCGIFFLAGS)
791 */
792 snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tap%d", tap_unit);
793
794 ifr.ifr_flags = flags & 0xffff;
795 ifr.ifr_flagshigh = flags >> 16;
796 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
797 warn("tap%d: ioctl(SIOCSIFFLAGS) failed", tap_unit);
798 return -1;
799 }
800 return 0;
801}
802
803static
804int
805netif_set_tapaddr(int tap_unit, in_addr_t addr, in_addr_t mask, int s)
806{
807 struct ifaliasreq ifra;
808 struct sockaddr_in *in;
809
810 bzero(&ifra, sizeof(ifra));
811 snprintf(ifra.ifra_name, sizeof(ifra.ifra_name), "tap%d", tap_unit);
812
813 /* Setup address */
814 in = (struct sockaddr_in *)&ifra.ifra_addr;
815 in->sin_family = AF_INET;
816 in->sin_len = sizeof(*in);
817 in->sin_addr.s_addr = addr;
818
819 if (mask != 0) {
820 /* Setup netmask */
821 in = (struct sockaddr_in *)&ifra.ifra_mask;
822 in->sin_len = sizeof(*in);
823 in->sin_addr.s_addr = mask;
824 }
825
826 if (ioctl(s, SIOCAIFADDR, &ifra) < 0) {
827 warn("tap%d: ioctl(SIOCAIFADDR) failed", tap_unit);
828 return -1;
829 }
830 return 0;
831}
832
833static
834int
835netif_add_tap2brg(int tap_unit, const char *ifbridge, int s)
836{
837 struct ifbreq ifbr;
838 struct ifdrv ifd;
839
840 bzero(&ifbr, sizeof(ifbr));
841 snprintf(ifbr.ifbr_ifsname, sizeof(ifbr.ifbr_ifsname),
842 "tap%d", tap_unit);
843
844 bzero(&ifd, sizeof(ifd));
845 strlcpy(ifd.ifd_name, ifbridge, sizeof(ifd.ifd_name));
846 ifd.ifd_cmd = BRDGADD;
847 ifd.ifd_len = sizeof(ifbr);
848 ifd.ifd_data = &ifbr;
849
850 if (ioctl(s, SIOCSDRVSPEC, &ifd) < 0) {
851 /*
852 * 'errno == EEXIST' means that the tap(4) is already
853 * a member of the bridge(4)
854 */
855 if (errno != EEXIST) {
856 warn("ioctl(%s, SIOCSDRVSPEC) failed", ifbridge);
857 return -1;
858 }
859 }
860 return 0;
861}
862
863#define TAPDEV_OFLAGS (O_RDWR | O_NONBLOCK)
864
865/*
866 * Locate the first unused tap(4) device file if auto mode is requested,
867 * or open the user supplied device file, and bring up the corresponding
868 * tap(4) interface.
869 *
870 * NOTE: Only tap(4) device file is supported currently
871 */
872static
873int
874netif_open_tap(const char *netif, int *tap_unit, int s)
875{
876 char tap_dev[MAXPATHLEN];
877 int tap_fd, failed;
878 struct stat st;
879 char *dname;
880
881 *tap_unit = -1;
882
883 if (strcmp(netif, "auto") == 0) {
884 /*
885 * Find first unused tap(4) device file
886 */
887 tap_fd = open("/dev/tap", TAPDEV_OFLAGS);
888 if (tap_fd < 0) {
889 warnc(errno, "Unable to find a free tap(4)");
890 return -1;
891 }
892 } else {
893 /*
894 * User supplied tap(4) device file or unix socket.
895 */
896 if (netif[0] == '/') /* Absolute path */
897 strlcpy(tap_dev, netif, sizeof(tap_dev));
898 else
899 snprintf(tap_dev, sizeof(tap_dev), "/dev/%s", netif);
900
901 tap_fd = open(tap_dev, TAPDEV_OFLAGS);
902
903 /*
904 * If we cannot open normally try to connect to it.
905 */
906 if (tap_fd < 0)
907 tap_fd = unix_connect(tap_dev);
908
909 if (tap_fd < 0) {
910 warn("Unable to open %s", tap_dev);
911 return -1;
912 }
913 }
914
915 /*
916 * Check whether the device file is a tap(4)
917 */
918 if (fstat(tap_fd, &st) < 0) {
919 failed = 1;
920 } else if (S_ISCHR(st.st_mode)) {
921 dname = fdevname(tap_fd);
922 if (dname)
923 dname = strstr(dname, "tap");
924 if (dname) {
925 /*
926 * Bring up the corresponding tap(4) interface
927 */
928 *tap_unit = strtol(dname + 3, NULL, 10);
929 printf("TAP UNIT %d\n", *tap_unit);
930 if (netif_set_tapflags(*tap_unit, IFF_UP, s) == 0)
931 failed = 0;
3b6e5cb0
SW
932 else
933 failed = 1;
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JG
934 } else {
935 failed = 1;
936 }
937 } else if (S_ISSOCK(st.st_mode)) {
938 /*
939 * Special socket connection (typically to vknet). We
940 * do not have to do anything.
941 */
942 failed = 0;
943 } else {
944 failed = 1;
945 }
946
947 if (failed) {
948 warnx("%s is not a tap(4) device or socket", tap_dev);
949 close(tap_fd);
950 tap_fd = -1;
951 *tap_unit = -1;
952 }
953 return tap_fd;
954}
955
956static int
957unix_connect(const char *path)
958{
959 struct sockaddr_un sunx;
960 int len;
961 int net_fd;
962 int sndbuf = 262144;
963 struct stat st;
964
965 snprintf(sunx.sun_path, sizeof(sunx.sun_path), "%s", path);
966 len = offsetof(struct sockaddr_un, sun_path[strlen(sunx.sun_path)]);
967 ++len; /* include nul */
968 sunx.sun_family = AF_UNIX;
969 sunx.sun_len = len;
970
971 net_fd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
972 if (net_fd < 0)
973 return(-1);
974 if (connect(net_fd, (void *)&sunx, len) < 0) {
975 close(net_fd);
976 return(-1);
977 }
978 setsockopt(net_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf));
979 if (fstat(net_fd, &st) == 0)
980 printf("Network socket buffer: %d bytes\n", st.st_blksize);
981 fcntl(net_fd, F_SETFL, O_NONBLOCK);
982 return(net_fd);
983}
984
985#undef TAPDEV_MAJOR
986#undef TAPDEV_MINOR
987#undef TAPDEV_OFLAGS
988
989/*
990 * Following syntax is supported,
991 * 1) x.x.x.x tap(4)'s address is x.x.x.x
992 *
993 * 2) x.x.x.x/z tap(4)'s address is x.x.x.x
994 * tap(4)'s netmask len is z
995 *
996 * 3) x.x.x.x:y.y.y.y tap(4)'s address is x.x.x.x
997 * pseudo netif's address is y.y.y.y
998 *
999 * 4) x.x.x.x:y.y.y.y/z tap(4)'s address is x.x.x.x
1000 * pseudo netif's address is y.y.y.y
1001 * tap(4) and pseudo netif's netmask len are z
1002 *
1003 * 5) bridgeX tap(4) will be added to bridgeX
1004 *
1005 * 6) bridgeX:y.y.y.y tap(4) will be added to bridgeX
1006 * pseudo netif's address is y.y.y.y
1007 *
1008 * 7) bridgeX:y.y.y.y/z tap(4) will be added to bridgeX
1009 * pseudo netif's address is y.y.y.y
1010 * pseudo netif's netmask len is z
1011 */
1012static
1013int
1014netif_init_tap(int tap_unit, in_addr_t *addr, in_addr_t *mask, int s)
1015{
1016 in_addr_t tap_addr, netmask, netif_addr;
1017 int next_netif_addr;
1018 char *tok, *masklen_str, *ifbridge;
1019
1020 *addr = 0;
1021 *mask = 0;
1022
1023 tok = strtok(NULL, ":/");
1024 if (tok == NULL) {
1025 /*
1026 * Nothing special, simply use tap(4) as backend
1027 */
1028 return 0;
1029 }
1030
1031 if (inet_pton(AF_INET, tok, &tap_addr) > 0) {
1032 /*
1033 * tap(4)'s address is supplied
1034 */
1035 ifbridge = NULL;
1036
1037 /*
1038 * If there is next token, then it may be pseudo
1039 * netif's address or netmask len for tap(4)
1040 */
1041 next_netif_addr = 0;
1042 } else {
1043 /*
1044 * Not tap(4)'s address, assume it as a bridge(4)
1045 * iface name
1046 */
1047 tap_addr = 0;
1048 ifbridge = tok;
1049
1050 /*
1051 * If there is next token, then it must be pseudo
1052 * netif's address
1053 */
1054 next_netif_addr = 1;
1055 }
1056
1057 netmask = netif_addr = 0;
1058
1059 tok = strtok(NULL, ":/");
1060 if (tok == NULL)
1061 goto back;
1062
1063 if (inet_pton(AF_INET, tok, &netif_addr) <= 0) {
1064 if (next_netif_addr) {
1065 warnx("Invalid pseudo netif address: %s", tok);
1066 return -1;
1067 }
1068 netif_addr = 0;
1069
1070 /*
1071 * Current token is not address, then it must be netmask len
1072 */
1073 masklen_str = tok;
1074 } else {
1075 /*
1076 * Current token is pseudo netif address, if there is next token
1077 * it must be netmask len
1078 */
1079 masklen_str = strtok(NULL, "/");
1080 }
1081
1082 /* Calculate netmask */
1083 if (masklen_str != NULL) {
1084 u_long masklen;
1085
1086 masklen = strtoul(masklen_str, NULL, 10);
1087 if (masklen < 32 && masklen > 0) {
1088 netmask = htonl(~((1LL << (32 - masklen)) - 1)
1089 & 0xffffffff);
1090 } else {
1091 warnx("Invalid netmask len: %lu", masklen);
1092 return -1;
1093 }
1094 }
1095
1096 /* Make sure there is no more token left */
1097 if (strtok(NULL, ":/") != NULL) {
1098 warnx("Invalid argument to '-I'");
1099 return -1;
1100 }
1101
1102back:
1103 if (tap_unit < 0) {
1104 /* Do nothing */
1105 } else if (ifbridge == NULL) {
1106 /* Set tap(4) address/netmask */
1107 if (netif_set_tapaddr(tap_unit, tap_addr, netmask, s) < 0)
1108 return -1;
1109 } else {
1110 /* Tie tap(4) to bridge(4) */
1111 if (netif_add_tap2brg(tap_unit, ifbridge, s) < 0)
1112 return -1;
1113 }
1114
1115 *addr = netif_addr;
1116 *mask = netmask;
1117 return 0;
1118}
1119
1120/*
1121 * NetifInfo[] will be filled for pseudo netif initialization.
1122 * NetifNum will be bumped to reflect the number of valid entries
1123 * in NetifInfo[].
1124 */
1125static
1126void
1127init_netif(char *netifExp[], int netifExpNum)
1128{
1129 int i, s;
1130
1131 if (netifExpNum == 0)
1132 return;
1133
1134 s = socket(AF_INET, SOCK_DGRAM, 0); /* for ioctl(SIOC) */
1135 if (s < 0)
1136 return;
1137
1138 for (i = 0; i < netifExpNum; ++i) {
1139 struct vknetif_info *info;
1140 in_addr_t netif_addr, netif_mask;
1141 int tap_fd, tap_unit;
1142 char *netif;
1143
1144 netif = strtok(netifExp[i], ":");
1145 if (netif == NULL) {
1146 warnx("Invalid argument to '-I'");
1147 continue;
1148 }
1149
1150 /*
1151 * Open tap(4) device file and bring up the
1152 * corresponding interface
1153 */
1154 tap_fd = netif_open_tap(netif, &tap_unit, s);
1155 if (tap_fd < 0)
1156 continue;
1157
1158 /*
1159 * Initialize tap(4) and get address/netmask
1160 * for pseudo netif
1161 *
1162 * NB: Rest part of netifExp[i] is passed
1163 * to netif_init_tap() implicitly.
1164 */
1165 if (netif_init_tap(tap_unit, &netif_addr, &netif_mask, s) < 0) {
1166 /*
1167 * NB: Closing tap(4) device file will bring
1168 * down the corresponding interface
1169 */
1170 close(tap_fd);
1171 continue;
1172 }
1173
1174 info = &NetifInfo[NetifNum];
1175 info->tap_fd = tap_fd;
1176 info->tap_unit = tap_unit;
1177 info->netif_addr = netif_addr;
1178 info->netif_mask = netif_mask;
1179
1180 NetifNum++;
1181 if (NetifNum >= VKNETIF_MAX) /* XXX will this happen? */
1182 break;
1183 }
1184 close(s);
1185}
1186
1187static
1188void
1189writepid( void )
1190{
1191 pid_t self;
1192 FILE *fp;
1193
1194 if (pid_file != NULL) {
1195 self = getpid();
1196 fp = fopen(pid_file, "w");
1197
1198 if (fp != NULL) {
1199 fprintf(fp, "%ld\n", (long)self);
1200 fclose(fp);
1201 }
1202 else {
1203 perror("Warning: couldn't open pidfile");
1204 }
1205 }
1206}
1207
1208static
1209void
1210cleanpid( void )
1211{
1212 if (pid_file != NULL) {
1213 if ( unlink(pid_file) != 0 )
1214 perror("Warning: couldn't remove pidfile");
1215 }
1216}
1217
1218static
1219void
278c4e67 1220usage_err(const char *ctl, ...)
da673940
JG
1221{
1222 va_list va;
1223
1224 va_start(va, ctl);
1225 vfprintf(stderr, ctl, va);
1226 va_end(va);
1227 fprintf(stderr, "\n");
278c4e67
SG
1228 exit(EX_USAGE);
1229}
1230
1231static
1232void
1233usage_help(_Bool help)
1234{
1235 fprintf(stderr, "Usage: %s [-hsUv] [-c file] [-e name=value:name=value:...]\n"
1236 "\t[-i file] [-I interface[:address1[:address2][/netmask]]] [-l cpulock]\n"
1237 "\t[-m size] [-n numcpus] [-p file] [-r file]\n", save_av[0]);
1238
1239 if (help)
1240 fprintf(stderr, "\nArguments:\n"
1241 "\t-c\tSpecify a readonly CD-ROM image file to be used by the kernel.\n"
1242 "\t-e\tSpecify an environment to be used by the kernel.\n"
1243 "\t-h\tThis list of options.\n"
1244 "\t-i\tSpecify a memory image file to be used by the virtual kernel.\n"
1245 "\t-I\tCreate a virtual network device.\n"
1246 "\t-l\tSpecify which, if any, real CPUs to lock virtual CPUs to.\n"
1247 "\t-m\tSpecify the amount of memory to be used by the kernel in bytes.\n"
1248 "\t-n\tSpecify the number of CPUs you wish to emulate.\n"
1249 "\t-p\tSpecify a file in which to store the process ID.\n"
1250 "\t-r\tSpecify a R/W disk image file to be used by the kernel.\n"
1251 "\t-s\tBoot into single-user mode.\n"
1252 "\t-U\tEnable writing to kernel memory and module loading.\n"
1253 "\t-v\tTurn on verbose booting.\n");
1254
1255 exit(EX_USAGE);
da673940
JG
1256}
1257
1258void
1259cpu_reset(void)
1260{
1261 kprintf("cpu reset, rebooting vkernel\n");
1262 closefrom(3);
1263 cleanpid();
1264 execv(save_av[0], save_av);
1265}
1266
1267void
1268cpu_halt(void)
1269{
1270 kprintf("cpu halt, exiting vkernel\n");
1271 cleanpid();
278c4e67 1272 exit(EX_OK);
da673940
JG
1273}
1274
1275void
1276setrealcpu(void)
1277{
1278 switch(lwp_cpu_lock) {
1279 case LCL_PER_CPU:
1280 if (bootverbose)
1281 kprintf("Locking CPU%d to real cpu %d\n",
1282 mycpuid, next_cpu);
1283 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1284 next_cpu++;
1285 if (next_cpu >= real_ncpus)
1286 next_cpu = 0;
1287 break;
1288 case LCL_SINGLE_CPU:
1289 if (bootverbose)
1290 kprintf("Locking CPU%d to real cpu %d\n",
1291 mycpuid, next_cpu);
1292 usched_set(getpid(), USCHED_SET_CPU, &next_cpu, sizeof(next_cpu));
1293 break;
1294 default:
1295 /* do not map virtual cpus to real cpus */
1296 break;
1297 }
1298}