1/*-
2 * Copyright (c) 2011 NetApp, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <sys/param.h>
33#include <sys/kernel.h>
34#include <sys/queue.h>
35#include <sys/lock.h>
36#include <sys/mutex.h>
37#include <sys/malloc.h>
38#include <sys/conf.h>
39#include <sys/sysctl.h>
40#include <sys/libkern.h>
41#include <sys/ioccom.h>
42#include <sys/mman.h>
43#include <sys/uio.h>
44
45#include <vm/vm.h>
46#include <vm/pmap.h>
47
48#include <machine/pmap.h>
49#include <machine/vmparam.h>
50
51#include <machine/vmm.h>
52#include "vmm_lapic.h"
53#include "vmm_stat.h"
54#include "vmm_mem.h"
55#include "io/ppt.h"
56#include <machine/vmm_dev.h>
57
58struct vmmdev_softc {
59 struct vm *vm; /* vm instance cookie */
60 struct cdev *cdev;
61 SLIST_ENTRY(vmmdev_softc) link;
62};
63static SLIST_HEAD(, vmmdev_softc) head;
64
65static struct mtx vmmdev_mtx;
66
67static MALLOC_DEFINE(M_VMMDEV, "vmmdev", "vmmdev");
68
69SYSCTL_DECL(_hw_vmm);
70
71static struct vmmdev_softc *
72vmmdev_lookup(const char *name)
73{
74 struct vmmdev_softc *sc;
75
76#ifdef notyet /* XXX kernel is not compiled with invariants */
77 mtx_assert(&vmmdev_mtx, MA_OWNED);
78#endif
79
80 SLIST_FOREACH(sc, &head, link) {
81 if (strcmp(name, vm_name(sc->vm)) == 0)
82 break;
83 }
84
85 return (sc);
86}
87
88static struct vmmdev_softc *
89vmmdev_lookup2(struct cdev *cdev)
90{
91 struct vmmdev_softc *sc;
92
93#ifdef notyet /* XXX kernel is not compiled with invariants */
94 mtx_assert(&vmmdev_mtx, MA_OWNED);
95#endif
96
97 SLIST_FOREACH(sc, &head, link) {
98 if (sc->cdev == cdev)
99 break;
100 }
101
102 return (sc);
103}
104
105static int
106vmmdev_rw(struct cdev *cdev, struct uio *uio, int flags)
107{
108 int error, off, c;
109 vm_paddr_t hpa, gpa;
110 struct vmmdev_softc *sc;
111
112 static char zerobuf[PAGE_SIZE];
113
114 error = 0;
115 mtx_lock(&vmmdev_mtx);
116 sc = vmmdev_lookup2(cdev);
117
118 while (uio->uio_resid > 0 && error == 0) {
119 gpa = uio->uio_offset;
120 off = gpa & PAGE_MASK;
121 c = min(uio->uio_resid, PAGE_SIZE - off);
122
123 /*
124 * The VM has a hole in its physical memory map. If we want to
125 * use 'dd' to inspect memory beyond the hole we need to
126 * provide bogus data for memory that lies in the hole.
127 *
128 * Since this device does not support lseek(2), dd(1) will
129 * read(2) blocks of data to simulate the lseek(2).
130 */
131 hpa = vm_gpa2hpa(sc->vm, gpa, c);
132 if (hpa == (vm_paddr_t)-1) {
133 if (uio->uio_rw == UIO_READ)
134 error = uiomove(zerobuf, c, uio);
135 else
136 error = EFAULT;
137 } else
138 error = uiomove((void *)PHYS_TO_DMAP(hpa), c, uio);
139 }
140
141 mtx_unlock(&vmmdev_mtx);
142 return (error);
143}
144
145static int
146vmmdev_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, int fflag,
147 struct thread *td)
148{
149 int error, vcpu;
150 struct vmmdev_softc *sc;
151 struct vm_memory_segment *seg;
152 struct vm_register *vmreg;
153 struct vm_seg_desc* vmsegdesc;
154 struct vm_pin *vmpin;
155 struct vm_run *vmrun;
156 struct vm_event *vmevent;
157 struct vm_lapic_irq *vmirq;
158 struct vm_capability *vmcap;
159 struct vm_pptdev *pptdev;
160 struct vm_pptdev_mmio *pptmmio;
161 struct vm_pptdev_msi *pptmsi;
162 struct vm_pptdev_msix *pptmsix;
163 struct vm_nmi *vmnmi;
164 struct vm_stats *vmstats;
165 struct vm_stat_desc *statdesc;
|
| 166 struct vm_x2apic *x2apic; |
167
168 mtx_lock(&vmmdev_mtx);
169 sc = vmmdev_lookup2(cdev);
170 if (sc == NULL) {
171 mtx_unlock(&vmmdev_mtx);
172 return (ENXIO);
173 }
174
175 /*
176 * Some VMM ioctls can operate only on vcpus that are not running.
177 */
178 switch (cmd) {
179 case VM_RUN:
180 case VM_SET_PINNING:
181 case VM_GET_REGISTER:
182 case VM_SET_REGISTER:
183 case VM_GET_SEGMENT_DESCRIPTOR:
184 case VM_SET_SEGMENT_DESCRIPTOR:
185 case VM_INJECT_EVENT:
186 case VM_GET_CAPABILITY:
187 case VM_SET_CAPABILITY:
188 case VM_PPTDEV_MSI:
|
| 189 case VM_SET_X2APIC_STATE: |
190 /*
191 * XXX fragile, handle with care
192 * Assumes that the first field of the ioctl data is the vcpu.
193 */
194 vcpu = *(int *)data;
195 if (vcpu < 0 || vcpu >= VM_MAXCPU) {
196 error = EINVAL;
197 goto done;
198 }
199
200 if (vcpu_is_running(sc->vm, vcpu, NULL)) {
201 error = EBUSY;
202 goto done;
203 }
204 break;
205 default:
206 break;
207 }
208
209 switch(cmd) {
210 case VM_RUN:
211 vmrun = (struct vm_run *)data;
212
213 vm_set_run_state(sc->vm, vmrun->cpuid, VCPU_RUNNING);
214 mtx_unlock(&vmmdev_mtx);
215
216 error = vm_run(sc->vm, vmrun);
217
218 mtx_lock(&vmmdev_mtx);
219 vm_set_run_state(sc->vm, vmrun->cpuid, VCPU_STOPPED);
220 break;
221 case VM_STAT_DESC: {
222 const char *desc;
223 statdesc = (struct vm_stat_desc *)data;
224 desc = vmm_stat_desc(statdesc->index);
225 if (desc != NULL) {
226 error = 0;
227 strlcpy(statdesc->desc, desc, sizeof(statdesc->desc));
228 } else
229 error = EINVAL;
230 break;
231 }
232 case VM_STATS: {
233 CTASSERT(MAX_VM_STATS >= MAX_VMM_STAT_TYPES);
234 vmstats = (struct vm_stats *)data;
235 getmicrotime(&vmstats->tv);
236 error = vmm_stat_copy(sc->vm, vmstats->cpuid,
237 &vmstats->num_entries, vmstats->statbuf);
238 break;
239 }
240 case VM_PPTDEV_MSI:
241 pptmsi = (struct vm_pptdev_msi *)data;
242 error = ppt_setup_msi(sc->vm, pptmsi->vcpu,
243 pptmsi->bus, pptmsi->slot, pptmsi->func,
244 pptmsi->destcpu, pptmsi->vector,
245 pptmsi->numvec);
246 break;
247 case VM_PPTDEV_MSIX:
248 pptmsix = (struct vm_pptdev_msix *)data;
249 error = ppt_setup_msix(sc->vm, pptmsix->vcpu,
250 pptmsix->bus, pptmsix->slot,
251 pptmsix->func, pptmsix->idx,
252 pptmsix->msg, pptmsix->vector_control,
253 pptmsix->addr);
254 break;
255 case VM_MAP_PPTDEV_MMIO:
256 pptmmio = (struct vm_pptdev_mmio *)data;
257 error = ppt_map_mmio(sc->vm, pptmmio->bus, pptmmio->slot,
258 pptmmio->func, pptmmio->gpa, pptmmio->len,
259 pptmmio->hpa);
260 break;
261 case VM_BIND_PPTDEV:
262 pptdev = (struct vm_pptdev *)data;
263 error = ppt_assign_device(sc->vm, pptdev->bus, pptdev->slot,
264 pptdev->func);
265 break;
266 case VM_UNBIND_PPTDEV:
267 pptdev = (struct vm_pptdev *)data;
268 error = ppt_unassign_device(sc->vm, pptdev->bus, pptdev->slot,
269 pptdev->func);
270 break;
271 case VM_INJECT_EVENT:
272 vmevent = (struct vm_event *)data;
273 error = vm_inject_event(sc->vm, vmevent->cpuid, vmevent->type,
274 vmevent->vector,
275 vmevent->error_code,
276 vmevent->error_code_valid);
277 break;
278 case VM_INJECT_NMI:
279 vmnmi = (struct vm_nmi *)data;
280 error = vm_inject_nmi(sc->vm, vmnmi->cpuid);
281 break;
282 case VM_LAPIC_IRQ:
283 vmirq = (struct vm_lapic_irq *)data;
284 error = lapic_set_intr(sc->vm, vmirq->cpuid, vmirq->vector);
285 break;
286 case VM_SET_PINNING:
287 vmpin = (struct vm_pin *)data;
288 error = vm_set_pinning(sc->vm, vmpin->vm_cpuid,
289 vmpin->host_cpuid);
290 break;
291 case VM_GET_PINNING:
292 vmpin = (struct vm_pin *)data;
293 error = vm_get_pinning(sc->vm, vmpin->vm_cpuid,
294 &vmpin->host_cpuid);
295 break;
296 case VM_MAP_MEMORY:
297 seg = (struct vm_memory_segment *)data;
298 error = vm_malloc(sc->vm, seg->gpa, seg->len, &seg->hpa);
299 break;
300 case VM_GET_MEMORY_SEG:
301 seg = (struct vm_memory_segment *)data;
302 seg->hpa = seg->len = 0;
303 (void)vm_gpabase2memseg(sc->vm, seg->gpa, seg);
304 error = 0;
305 break;
306 case VM_GET_REGISTER:
307 vmreg = (struct vm_register *)data;
308 error = vm_get_register(sc->vm, vmreg->cpuid, vmreg->regnum,
309 &vmreg->regval);
310 break;
311 case VM_SET_REGISTER:
312 vmreg = (struct vm_register *)data;
313 error = vm_set_register(sc->vm, vmreg->cpuid, vmreg->regnum,
314 vmreg->regval);
315 break;
316 case VM_SET_SEGMENT_DESCRIPTOR:
317 vmsegdesc = (struct vm_seg_desc *)data;
318 error = vm_set_seg_desc(sc->vm, vmsegdesc->cpuid,
319 vmsegdesc->regnum,
320 &vmsegdesc->desc);
321 break;
322 case VM_GET_SEGMENT_DESCRIPTOR:
323 vmsegdesc = (struct vm_seg_desc *)data;
324 error = vm_get_seg_desc(sc->vm, vmsegdesc->cpuid,
325 vmsegdesc->regnum,
326 &vmsegdesc->desc);
327 break;
328 case VM_GET_CAPABILITY:
329 vmcap = (struct vm_capability *)data;
330 error = vm_get_capability(sc->vm, vmcap->cpuid,
331 vmcap->captype,
332 &vmcap->capval);
333 break;
334 case VM_SET_CAPABILITY:
335 vmcap = (struct vm_capability *)data;
336 error = vm_set_capability(sc->vm, vmcap->cpuid,
337 vmcap->captype,
338 vmcap->capval);
339 break;
|
340 case VM_SET_X2APIC_STATE:
341 x2apic = (struct vm_x2apic *)data;
342 error = vm_set_x2apic_state(sc->vm,
343 x2apic->cpuid, x2apic->state);
344 break;
345 case VM_GET_X2APIC_STATE:
346 x2apic = (struct vm_x2apic *)data;
347 error = vm_get_x2apic_state(sc->vm,
348 x2apic->cpuid, &x2apic->state);
349 break; |
350 default:
351 error = ENOTTY;
352 break;
353 }
354done:
355 mtx_unlock(&vmmdev_mtx);
356
357 return (error);
358}
359
360static int
361vmmdev_mmap(struct cdev *cdev, vm_ooffset_t offset, vm_paddr_t *paddr,
362 int nprot, vm_memattr_t *memattr)
363{
364 int error;
365 struct vmmdev_softc *sc;
366
367 error = -1;
368 mtx_lock(&vmmdev_mtx);
369
370 sc = vmmdev_lookup2(cdev);
371 if (sc != NULL && (nprot & PROT_EXEC) == 0) {
372 *paddr = vm_gpa2hpa(sc->vm, (vm_paddr_t)offset, PAGE_SIZE);
373 if (*paddr != (vm_paddr_t)-1)
374 error = 0;
375 }
376
377 mtx_unlock(&vmmdev_mtx);
378
379 return (error);
380}
381
382static void
383vmmdev_destroy(struct vmmdev_softc *sc)
384{
385
386#ifdef notyet /* XXX kernel is not compiled with invariants */
387 mtx_assert(&vmmdev_mtx, MA_OWNED);
388#endif
389
390 /*
391 * XXX must stop virtual machine instances that may be still
392 * running and cleanup their state.
393 */
394 SLIST_REMOVE(&head, sc, vmmdev_softc, link);
395 destroy_dev(sc->cdev);
396 vm_destroy(sc->vm);
397 free(sc, M_VMMDEV);
398}
399
400static int
401sysctl_vmm_destroy(SYSCTL_HANDLER_ARGS)
402{
403 int error;
404 char buf[VM_MAX_NAMELEN];
405 struct vmmdev_softc *sc;
406
407 strlcpy(buf, "beavis", sizeof(buf));
408 error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
409 if (error != 0 || req->newptr == NULL)
410 return (error);
411
412 mtx_lock(&vmmdev_mtx);
413 sc = vmmdev_lookup(buf);
414 if (sc == NULL) {
415 mtx_unlock(&vmmdev_mtx);
416 return (EINVAL);
417 }
418 vmmdev_destroy(sc);
419 mtx_unlock(&vmmdev_mtx);
420 return (0);
421}
422SYSCTL_PROC(_hw_vmm, OID_AUTO, destroy, CTLTYPE_STRING | CTLFLAG_RW,
423 NULL, 0, sysctl_vmm_destroy, "A", NULL);
424
425static struct cdevsw vmmdevsw = {
426 .d_name = "vmmdev",
427 .d_version = D_VERSION,
428 .d_ioctl = vmmdev_ioctl,
429 .d_mmap = vmmdev_mmap,
430 .d_read = vmmdev_rw,
431 .d_write = vmmdev_rw,
432};
433
434static int
435sysctl_vmm_create(SYSCTL_HANDLER_ARGS)
436{
437 int error;
438 struct vm *vm;
439 struct vmmdev_softc *sc;
440 char buf[VM_MAX_NAMELEN];
441
442 strlcpy(buf, "beavis", sizeof(buf));
443 error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
444 if (error != 0 || req->newptr == NULL)
445 return (error);
446
447 mtx_lock(&vmmdev_mtx);
448
449 sc = vmmdev_lookup(buf);
450 if (sc != NULL) {
451 mtx_unlock(&vmmdev_mtx);
452 return (EEXIST);
453 }
454
455 vm = vm_create(buf);
456 if (vm == NULL) {
457 mtx_unlock(&vmmdev_mtx);
458 return (EINVAL);
459 }
460
461 sc = malloc(sizeof(struct vmmdev_softc), M_VMMDEV, M_WAITOK | M_ZERO);
462 sc->vm = vm;
463 sc->cdev = make_dev(&vmmdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
464 "vmm/%s", buf);
465 sc->cdev->si_drv1 = sc;
466 SLIST_INSERT_HEAD(&head, sc, link);
467
468 mtx_unlock(&vmmdev_mtx);
469 return (0);
470}
471SYSCTL_PROC(_hw_vmm, OID_AUTO, create, CTLTYPE_STRING | CTLFLAG_RW,
472 NULL, 0, sysctl_vmm_create, "A", NULL);
473
474static int
475sysctl_vmm_mem_total(SYSCTL_HANDLER_ARGS)
476{
477 size_t val = vmm_mem_get_mem_total();
478 return sysctl_handle_long(oidp, &val, 0, req);
479}
480SYSCTL_PROC(_hw_vmm, OID_AUTO, mem_total, CTLTYPE_LONG | CTLFLAG_RD,
481 0, 0, sysctl_vmm_mem_total, "LU", "Amount of Total memory");
482
483static int
484sysctl_vmm_mem_free(SYSCTL_HANDLER_ARGS)
485{
486 size_t val = vmm_mem_get_mem_free();
487 return sysctl_handle_long(oidp, &val, 0, req);
488}
489SYSCTL_PROC(_hw_vmm, OID_AUTO, mem_free, CTLTYPE_LONG | CTLFLAG_RD,
490 0, 0, sysctl_vmm_mem_free, "LU", "Amount of Free memory");
491
492void
493vmmdev_init(void)
494{
495 mtx_init(&vmmdev_mtx, "vmm device mutex", NULL, MTX_DEF);
496}
497
498void
499vmmdev_cleanup(void)
500{
501 struct vmmdev_softc *sc, *sc2;
502
503 mtx_lock(&vmmdev_mtx);
504
505 SLIST_FOREACH_SAFE(sc, &head, link, sc2)
506 vmmdev_destroy(sc);
507
508 mtx_unlock(&vmmdev_mtx);
509}
|