vmm_dev.c revision 256072
1221828Sgrehan/*- 2221828Sgrehan * Copyright (c) 2011 NetApp, Inc. 3221828Sgrehan * All rights reserved. 4221828Sgrehan * 5221828Sgrehan * Redistribution and use in source and binary forms, with or without 6221828Sgrehan * modification, are permitted provided that the following conditions 7221828Sgrehan * are met: 8221828Sgrehan * 1. Redistributions of source code must retain the above copyright 9221828Sgrehan * notice, this list of conditions and the following disclaimer. 10221828Sgrehan * 2. Redistributions in binary form must reproduce the above copyright 11221828Sgrehan * notice, this list of conditions and the following disclaimer in the 12221828Sgrehan * documentation and/or other materials provided with the distribution. 13221828Sgrehan * 14221828Sgrehan * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 15221828Sgrehan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16221828Sgrehan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17221828Sgrehan * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 18221828Sgrehan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19221828Sgrehan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20221828Sgrehan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21221828Sgrehan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22221828Sgrehan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23221828Sgrehan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24221828Sgrehan * SUCH DAMAGE. 25221828Sgrehan * 26221828Sgrehan * $FreeBSD: head/sys/amd64/vmm/vmm_dev.c 256072 2013-10-05 21:22:35Z neel $ 27221828Sgrehan */ 28221828Sgrehan 29221828Sgrehan#include <sys/cdefs.h> 30221828Sgrehan__FBSDID("$FreeBSD: head/sys/amd64/vmm/vmm_dev.c 256072 2013-10-05 21:22:35Z neel $"); 31221828Sgrehan 32221828Sgrehan#include <sys/param.h> 33221828Sgrehan#include <sys/kernel.h> 34221828Sgrehan#include <sys/queue.h> 35221828Sgrehan#include <sys/lock.h> 36221828Sgrehan#include <sys/mutex.h> 37221828Sgrehan#include <sys/malloc.h> 38221828Sgrehan#include <sys/conf.h> 39221828Sgrehan#include <sys/sysctl.h> 40221828Sgrehan#include <sys/libkern.h> 41221828Sgrehan#include <sys/ioccom.h> 42221828Sgrehan#include <sys/mman.h> 43221828Sgrehan#include <sys/uio.h> 44221828Sgrehan 45221828Sgrehan#include <vm/vm.h> 46221828Sgrehan#include <vm/pmap.h> 47256072Sneel#include <vm/vm_map.h> 48221828Sgrehan 49221828Sgrehan#include <machine/pmap.h> 50221828Sgrehan#include <machine/vmparam.h> 51221828Sgrehan 52221828Sgrehan#include <machine/vmm.h> 53221828Sgrehan#include "vmm_lapic.h" 54221828Sgrehan#include "vmm_stat.h" 55239700Sgrehan#include "vmm_mem.h" 56221828Sgrehan#include "io/ppt.h" 57221828Sgrehan#include <machine/vmm_dev.h> 58221828Sgrehan 59221828Sgrehanstruct vmmdev_softc { 60221828Sgrehan struct vm *vm; /* vm instance cookie */ 61221828Sgrehan struct cdev *cdev; 62221828Sgrehan SLIST_ENTRY(vmmdev_softc) link; 63221828Sgrehan}; 64221828Sgrehanstatic SLIST_HEAD(, vmmdev_softc) head; 65221828Sgrehan 66221828Sgrehanstatic struct mtx vmmdev_mtx; 67221828Sgrehan 68221828Sgrehanstatic MALLOC_DEFINE(M_VMMDEV, "vmmdev", "vmmdev"); 69221828Sgrehan 70221828SgrehanSYSCTL_DECL(_hw_vmm); 71221828Sgrehan 72221828Sgrehanstatic struct vmmdev_softc * 73221828Sgrehanvmmdev_lookup(const char *name) 74221828Sgrehan{ 75221828Sgrehan struct vmmdev_softc *sc; 76221828Sgrehan 77221828Sgrehan#ifdef notyet /* XXX kernel is not compiled with invariants */ 78221828Sgrehan mtx_assert(&vmmdev_mtx, MA_OWNED); 79221828Sgrehan#endif 80221828Sgrehan 81221828Sgrehan SLIST_FOREACH(sc, &head, link) { 82221828Sgrehan if (strcmp(name, vm_name(sc->vm)) == 0) 83221828Sgrehan break; 84221828Sgrehan } 85221828Sgrehan 86221828Sgrehan return (sc); 87221828Sgrehan} 88221828Sgrehan 89221828Sgrehanstatic struct vmmdev_softc * 90221828Sgrehanvmmdev_lookup2(struct cdev *cdev) 91221828Sgrehan{ 92221828Sgrehan 93241454Sneel return (cdev->si_drv1); 94221828Sgrehan} 95221828Sgrehan 96221828Sgrehanstatic int 97221828Sgrehanvmmdev_rw(struct cdev *cdev, struct uio *uio, int flags) 98221828Sgrehan{ 99256072Sneel int error, off, c, prot; 100256072Sneel vm_paddr_t gpa; 101256072Sneel void *hpa, *cookie; 102221828Sgrehan struct vmmdev_softc *sc; 103221828Sgrehan 104221828Sgrehan static char zerobuf[PAGE_SIZE]; 105221828Sgrehan 106221828Sgrehan error = 0; 107221828Sgrehan mtx_lock(&vmmdev_mtx); 108221828Sgrehan sc = vmmdev_lookup2(cdev); 109241454Sneel if (sc == NULL) 110241454Sneel error = ENXIO; 111221828Sgrehan 112256072Sneel prot = (uio->uio_rw == UIO_WRITE ? VM_PROT_WRITE : VM_PROT_READ); 113221828Sgrehan while (uio->uio_resid > 0 && error == 0) { 114221828Sgrehan gpa = uio->uio_offset; 115221828Sgrehan off = gpa & PAGE_MASK; 116221828Sgrehan c = min(uio->uio_resid, PAGE_SIZE - off); 117221828Sgrehan 118221828Sgrehan /* 119221828Sgrehan * The VM has a hole in its physical memory map. If we want to 120221828Sgrehan * use 'dd' to inspect memory beyond the hole we need to 121221828Sgrehan * provide bogus data for memory that lies in the hole. 122221828Sgrehan * 123221828Sgrehan * Since this device does not support lseek(2), dd(1) will 124221828Sgrehan * read(2) blocks of data to simulate the lseek(2). 125221828Sgrehan */ 126256072Sneel hpa = vm_gpa_hold(sc->vm, gpa, c, prot, &cookie); 127256072Sneel if (hpa == NULL) { 128221828Sgrehan if (uio->uio_rw == UIO_READ) 129221828Sgrehan error = uiomove(zerobuf, c, uio); 130221828Sgrehan else 131221828Sgrehan error = EFAULT; 132256072Sneel } else { 133256072Sneel error = uiomove(hpa, c, uio); 134256072Sneel vm_gpa_release(cookie); 135256072Sneel } 136221828Sgrehan } 137221828Sgrehan 138221828Sgrehan mtx_unlock(&vmmdev_mtx); 139221828Sgrehan return (error); 140221828Sgrehan} 141221828Sgrehan 142221828Sgrehanstatic int 143221828Sgrehanvmmdev_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, int fflag, 144221828Sgrehan struct thread *td) 145221828Sgrehan{ 146241489Sneel int error, vcpu, state_changed; 147221828Sgrehan struct vmmdev_softc *sc; 148221828Sgrehan struct vm_memory_segment *seg; 149221828Sgrehan struct vm_register *vmreg; 150221828Sgrehan struct vm_seg_desc* vmsegdesc; 151221828Sgrehan struct vm_run *vmrun; 152221828Sgrehan struct vm_event *vmevent; 153221828Sgrehan struct vm_lapic_irq *vmirq; 154221828Sgrehan struct vm_capability *vmcap; 155221828Sgrehan struct vm_pptdev *pptdev; 156221828Sgrehan struct vm_pptdev_mmio *pptmmio; 157221828Sgrehan struct vm_pptdev_msi *pptmsi; 158234761Sgrehan struct vm_pptdev_msix *pptmsix; 159221828Sgrehan struct vm_nmi *vmnmi; 160221828Sgrehan struct vm_stats *vmstats; 161221828Sgrehan struct vm_stat_desc *statdesc; 162240922Sneel struct vm_x2apic *x2apic; 163256072Sneel struct vm_gpa_pte *gpapte; 164221828Sgrehan 165221828Sgrehan sc = vmmdev_lookup2(cdev); 166241489Sneel if (sc == NULL) 167221828Sgrehan return (ENXIO); 168221828Sgrehan 169241489Sneel vcpu = -1; 170241489Sneel state_changed = 0; 171241489Sneel 172221828Sgrehan /* 173221828Sgrehan * Some VMM ioctls can operate only on vcpus that are not running. 174221828Sgrehan */ 175221828Sgrehan switch (cmd) { 176221828Sgrehan case VM_RUN: 177221828Sgrehan case VM_GET_REGISTER: 178221828Sgrehan case VM_SET_REGISTER: 179221828Sgrehan case VM_GET_SEGMENT_DESCRIPTOR: 180221828Sgrehan case VM_SET_SEGMENT_DESCRIPTOR: 181221828Sgrehan case VM_INJECT_EVENT: 182221828Sgrehan case VM_GET_CAPABILITY: 183221828Sgrehan case VM_SET_CAPABILITY: 184221828Sgrehan case VM_PPTDEV_MSI: 185241489Sneel case VM_PPTDEV_MSIX: 186240922Sneel case VM_SET_X2APIC_STATE: 187221828Sgrehan /* 188221828Sgrehan * XXX fragile, handle with care 189221828Sgrehan * Assumes that the first field of the ioctl data is the vcpu. 190221828Sgrehan */ 191221828Sgrehan vcpu = *(int *)data; 192221828Sgrehan if (vcpu < 0 || vcpu >= VM_MAXCPU) { 193221828Sgrehan error = EINVAL; 194221828Sgrehan goto done; 195221828Sgrehan } 196221828Sgrehan 197256072Sneel error = vcpu_set_state(sc->vm, vcpu, VCPU_FROZEN); 198241489Sneel if (error) 199221828Sgrehan goto done; 200241489Sneel 201241489Sneel state_changed = 1; 202241489Sneel break; 203241489Sneel 204241489Sneel case VM_MAP_PPTDEV_MMIO: 205241489Sneel case VM_BIND_PPTDEV: 206241489Sneel case VM_UNBIND_PPTDEV: 207241489Sneel case VM_MAP_MEMORY: 208241489Sneel /* 209241489Sneel * ioctls that operate on the entire virtual machine must 210241489Sneel * prevent all vcpus from running. 211241489Sneel */ 212241489Sneel error = 0; 213241489Sneel for (vcpu = 0; vcpu < VM_MAXCPU; vcpu++) { 214256072Sneel error = vcpu_set_state(sc->vm, vcpu, VCPU_FROZEN); 215241489Sneel if (error) 216241489Sneel break; 217221828Sgrehan } 218241489Sneel 219241489Sneel if (error) { 220241489Sneel while (--vcpu >= 0) 221241489Sneel vcpu_set_state(sc->vm, vcpu, VCPU_IDLE); 222241489Sneel goto done; 223241489Sneel } 224241489Sneel 225241489Sneel state_changed = 2; 226221828Sgrehan break; 227241489Sneel 228221828Sgrehan default: 229221828Sgrehan break; 230221828Sgrehan } 231221828Sgrehan 232221828Sgrehan switch(cmd) { 233221828Sgrehan case VM_RUN: 234221828Sgrehan vmrun = (struct vm_run *)data; 235221828Sgrehan error = vm_run(sc->vm, vmrun); 236221828Sgrehan break; 237221828Sgrehan case VM_STAT_DESC: { 238221828Sgrehan statdesc = (struct vm_stat_desc *)data; 239250427Sneel error = vmm_stat_desc_copy(statdesc->index, 240250427Sneel statdesc->desc, sizeof(statdesc->desc)); 241221828Sgrehan break; 242221828Sgrehan } 243221828Sgrehan case VM_STATS: { 244250427Sneel CTASSERT(MAX_VM_STATS >= MAX_VMM_STAT_ELEMS); 245221828Sgrehan vmstats = (struct vm_stats *)data; 246221828Sgrehan getmicrotime(&vmstats->tv); 247221828Sgrehan error = vmm_stat_copy(sc->vm, vmstats->cpuid, 248221828Sgrehan &vmstats->num_entries, vmstats->statbuf); 249221828Sgrehan break; 250221828Sgrehan } 251221828Sgrehan case VM_PPTDEV_MSI: 252221828Sgrehan pptmsi = (struct vm_pptdev_msi *)data; 253221828Sgrehan error = ppt_setup_msi(sc->vm, pptmsi->vcpu, 254221828Sgrehan pptmsi->bus, pptmsi->slot, pptmsi->func, 255221828Sgrehan pptmsi->destcpu, pptmsi->vector, 256221828Sgrehan pptmsi->numvec); 257221828Sgrehan break; 258234761Sgrehan case VM_PPTDEV_MSIX: 259234761Sgrehan pptmsix = (struct vm_pptdev_msix *)data; 260234761Sgrehan error = ppt_setup_msix(sc->vm, pptmsix->vcpu, 261234761Sgrehan pptmsix->bus, pptmsix->slot, 262234761Sgrehan pptmsix->func, pptmsix->idx, 263234761Sgrehan pptmsix->msg, pptmsix->vector_control, 264234761Sgrehan pptmsix->addr); 265234761Sgrehan break; 266221828Sgrehan case VM_MAP_PPTDEV_MMIO: 267221828Sgrehan pptmmio = (struct vm_pptdev_mmio *)data; 268221828Sgrehan error = ppt_map_mmio(sc->vm, pptmmio->bus, pptmmio->slot, 269221828Sgrehan pptmmio->func, pptmmio->gpa, pptmmio->len, 270221828Sgrehan pptmmio->hpa); 271221828Sgrehan break; 272221828Sgrehan case VM_BIND_PPTDEV: 273221828Sgrehan pptdev = (struct vm_pptdev *)data; 274256072Sneel error = vm_assign_pptdev(sc->vm, pptdev->bus, pptdev->slot, 275256072Sneel pptdev->func); 276221828Sgrehan break; 277221828Sgrehan case VM_UNBIND_PPTDEV: 278221828Sgrehan pptdev = (struct vm_pptdev *)data; 279256072Sneel error = vm_unassign_pptdev(sc->vm, pptdev->bus, pptdev->slot, 280256072Sneel pptdev->func); 281221828Sgrehan break; 282221828Sgrehan case VM_INJECT_EVENT: 283221828Sgrehan vmevent = (struct vm_event *)data; 284221828Sgrehan error = vm_inject_event(sc->vm, vmevent->cpuid, vmevent->type, 285221828Sgrehan vmevent->vector, 286221828Sgrehan vmevent->error_code, 287221828Sgrehan vmevent->error_code_valid); 288221828Sgrehan break; 289221828Sgrehan case VM_INJECT_NMI: 290221828Sgrehan vmnmi = (struct vm_nmi *)data; 291221828Sgrehan error = vm_inject_nmi(sc->vm, vmnmi->cpuid); 292221828Sgrehan break; 293221828Sgrehan case VM_LAPIC_IRQ: 294221828Sgrehan vmirq = (struct vm_lapic_irq *)data; 295221828Sgrehan error = lapic_set_intr(sc->vm, vmirq->cpuid, vmirq->vector); 296221828Sgrehan break; 297221828Sgrehan case VM_MAP_MEMORY: 298221828Sgrehan seg = (struct vm_memory_segment *)data; 299241041Sneel error = vm_malloc(sc->vm, seg->gpa, seg->len); 300221828Sgrehan break; 301221828Sgrehan case VM_GET_MEMORY_SEG: 302221828Sgrehan seg = (struct vm_memory_segment *)data; 303241178Sneel seg->len = 0; 304221828Sgrehan (void)vm_gpabase2memseg(sc->vm, seg->gpa, seg); 305221828Sgrehan error = 0; 306221828Sgrehan break; 307221828Sgrehan case VM_GET_REGISTER: 308221828Sgrehan vmreg = (struct vm_register *)data; 309221828Sgrehan error = vm_get_register(sc->vm, vmreg->cpuid, vmreg->regnum, 310221828Sgrehan &vmreg->regval); 311221828Sgrehan break; 312221828Sgrehan case VM_SET_REGISTER: 313221828Sgrehan vmreg = (struct vm_register *)data; 314221828Sgrehan error = vm_set_register(sc->vm, vmreg->cpuid, vmreg->regnum, 315221828Sgrehan vmreg->regval); 316221828Sgrehan break; 317221828Sgrehan case VM_SET_SEGMENT_DESCRIPTOR: 318221828Sgrehan vmsegdesc = (struct vm_seg_desc *)data; 319221828Sgrehan error = vm_set_seg_desc(sc->vm, vmsegdesc->cpuid, 320221828Sgrehan vmsegdesc->regnum, 321221828Sgrehan &vmsegdesc->desc); 322221828Sgrehan break; 323221828Sgrehan case VM_GET_SEGMENT_DESCRIPTOR: 324221828Sgrehan vmsegdesc = (struct vm_seg_desc *)data; 325221828Sgrehan error = vm_get_seg_desc(sc->vm, vmsegdesc->cpuid, 326221828Sgrehan vmsegdesc->regnum, 327221828Sgrehan &vmsegdesc->desc); 328221828Sgrehan break; 329221828Sgrehan case VM_GET_CAPABILITY: 330221828Sgrehan vmcap = (struct vm_capability *)data; 331221828Sgrehan error = vm_get_capability(sc->vm, vmcap->cpuid, 332221828Sgrehan vmcap->captype, 333221828Sgrehan &vmcap->capval); 334221828Sgrehan break; 335221828Sgrehan case VM_SET_CAPABILITY: 336221828Sgrehan vmcap = (struct vm_capability *)data; 337221828Sgrehan error = vm_set_capability(sc->vm, vmcap->cpuid, 338221828Sgrehan vmcap->captype, 339221828Sgrehan vmcap->capval); 340221828Sgrehan break; 341240922Sneel case VM_SET_X2APIC_STATE: 342240922Sneel x2apic = (struct vm_x2apic *)data; 343240922Sneel error = vm_set_x2apic_state(sc->vm, 344240922Sneel x2apic->cpuid, x2apic->state); 345240922Sneel break; 346240922Sneel case VM_GET_X2APIC_STATE: 347240922Sneel x2apic = (struct vm_x2apic *)data; 348240922Sneel error = vm_get_x2apic_state(sc->vm, 349240922Sneel x2apic->cpuid, &x2apic->state); 350240922Sneel break; 351256072Sneel case VM_GET_GPA_PMAP: 352256072Sneel gpapte = (struct vm_gpa_pte *)data; 353256072Sneel pmap_get_mapping(vmspace_pmap(vm_get_vmspace(sc->vm)), 354256072Sneel gpapte->gpa, gpapte->pte, &gpapte->ptenum); 355256072Sneel error = 0; 356256072Sneel break; 357221828Sgrehan default: 358221828Sgrehan error = ENOTTY; 359221828Sgrehan break; 360221828Sgrehan } 361241489Sneel 362241489Sneel if (state_changed == 1) { 363241489Sneel vcpu_set_state(sc->vm, vcpu, VCPU_IDLE); 364241489Sneel } else if (state_changed == 2) { 365241489Sneel for (vcpu = 0; vcpu < VM_MAXCPU; vcpu++) 366241489Sneel vcpu_set_state(sc->vm, vcpu, VCPU_IDLE); 367241489Sneel } 368241489Sneel 369221828Sgrehandone: 370256072Sneel /* Make sure that no handler returns a bogus value like ERESTART */ 371256072Sneel KASSERT(error >= 0, ("vmmdev_ioctl: invalid error return %d", error)); 372221828Sgrehan return (error); 373221828Sgrehan} 374221828Sgrehan 375221828Sgrehanstatic int 376256072Sneelvmmdev_mmap_single(struct cdev *cdev, vm_ooffset_t *offset, 377256072Sneel vm_size_t size, struct vm_object **object, int nprot) 378221828Sgrehan{ 379221828Sgrehan int error; 380221828Sgrehan struct vmmdev_softc *sc; 381221828Sgrehan 382221828Sgrehan mtx_lock(&vmmdev_mtx); 383221828Sgrehan 384221828Sgrehan sc = vmmdev_lookup2(cdev); 385256072Sneel if (sc != NULL && (nprot & PROT_EXEC) == 0) 386256072Sneel error = vm_get_memobj(sc->vm, *offset, size, offset, object); 387256072Sneel else 388256072Sneel error = EINVAL; 389221828Sgrehan 390221828Sgrehan mtx_unlock(&vmmdev_mtx); 391221828Sgrehan 392221828Sgrehan return (error); 393221828Sgrehan} 394221828Sgrehan 395221828Sgrehanstatic void 396241454Sneelvmmdev_destroy(struct vmmdev_softc *sc, boolean_t unlink) 397221828Sgrehan{ 398221828Sgrehan 399221828Sgrehan /* 400221828Sgrehan * XXX must stop virtual machine instances that may be still 401221828Sgrehan * running and cleanup their state. 402221828Sgrehan */ 403241454Sneel if (sc->cdev) 404241454Sneel destroy_dev(sc->cdev); 405241454Sneel 406241454Sneel if (sc->vm) 407241454Sneel vm_destroy(sc->vm); 408241454Sneel 409241454Sneel if (unlink) { 410241454Sneel mtx_lock(&vmmdev_mtx); 411241454Sneel SLIST_REMOVE(&head, sc, vmmdev_softc, link); 412241454Sneel mtx_unlock(&vmmdev_mtx); 413241454Sneel } 414241454Sneel 415221828Sgrehan free(sc, M_VMMDEV); 416221828Sgrehan} 417221828Sgrehan 418221828Sgrehanstatic int 419221828Sgrehansysctl_vmm_destroy(SYSCTL_HANDLER_ARGS) 420221828Sgrehan{ 421221828Sgrehan int error; 422221828Sgrehan char buf[VM_MAX_NAMELEN]; 423221828Sgrehan struct vmmdev_softc *sc; 424221828Sgrehan 425221828Sgrehan strlcpy(buf, "beavis", sizeof(buf)); 426221828Sgrehan error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 427221828Sgrehan if (error != 0 || req->newptr == NULL) 428221828Sgrehan return (error); 429221828Sgrehan 430241454Sneel /* 431241454Sneel * XXX TODO if any process has this device open then fail 432241454Sneel */ 433241454Sneel 434221828Sgrehan mtx_lock(&vmmdev_mtx); 435221828Sgrehan sc = vmmdev_lookup(buf); 436221828Sgrehan if (sc == NULL) { 437221828Sgrehan mtx_unlock(&vmmdev_mtx); 438221828Sgrehan return (EINVAL); 439221828Sgrehan } 440241454Sneel 441241454Sneel sc->cdev->si_drv1 = NULL; 442221828Sgrehan mtx_unlock(&vmmdev_mtx); 443241454Sneel 444241454Sneel vmmdev_destroy(sc, TRUE); 445241454Sneel 446221828Sgrehan return (0); 447221828Sgrehan} 448221828SgrehanSYSCTL_PROC(_hw_vmm, OID_AUTO, destroy, CTLTYPE_STRING | CTLFLAG_RW, 449221828Sgrehan NULL, 0, sysctl_vmm_destroy, "A", NULL); 450221828Sgrehan 451221828Sgrehanstatic struct cdevsw vmmdevsw = { 452221828Sgrehan .d_name = "vmmdev", 453221828Sgrehan .d_version = D_VERSION, 454221828Sgrehan .d_ioctl = vmmdev_ioctl, 455256072Sneel .d_mmap_single = vmmdev_mmap_single, 456221828Sgrehan .d_read = vmmdev_rw, 457221828Sgrehan .d_write = vmmdev_rw, 458221828Sgrehan}; 459221828Sgrehan 460221828Sgrehanstatic int 461221828Sgrehansysctl_vmm_create(SYSCTL_HANDLER_ARGS) 462221828Sgrehan{ 463221828Sgrehan int error; 464221828Sgrehan struct vm *vm; 465241454Sneel struct vmmdev_softc *sc, *sc2; 466221828Sgrehan char buf[VM_MAX_NAMELEN]; 467221828Sgrehan 468221828Sgrehan strlcpy(buf, "beavis", sizeof(buf)); 469221828Sgrehan error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 470221828Sgrehan if (error != 0 || req->newptr == NULL) 471221828Sgrehan return (error); 472221828Sgrehan 473221828Sgrehan mtx_lock(&vmmdev_mtx); 474221828Sgrehan sc = vmmdev_lookup(buf); 475241454Sneel mtx_unlock(&vmmdev_mtx); 476241454Sneel if (sc != NULL) 477221828Sgrehan return (EEXIST); 478221828Sgrehan 479249396Sneel error = vm_create(buf, &vm); 480249396Sneel if (error != 0) 481249396Sneel return (error); 482221828Sgrehan 483221828Sgrehan sc = malloc(sizeof(struct vmmdev_softc), M_VMMDEV, M_WAITOK | M_ZERO); 484221828Sgrehan sc->vm = vm; 485241454Sneel 486241454Sneel /* 487241454Sneel * Lookup the name again just in case somebody sneaked in when we 488241454Sneel * dropped the lock. 489241454Sneel */ 490241454Sneel mtx_lock(&vmmdev_mtx); 491241454Sneel sc2 = vmmdev_lookup(buf); 492241454Sneel if (sc2 == NULL) 493241454Sneel SLIST_INSERT_HEAD(&head, sc, link); 494241454Sneel mtx_unlock(&vmmdev_mtx); 495241454Sneel 496241454Sneel if (sc2 != NULL) { 497241454Sneel vmmdev_destroy(sc, FALSE); 498241454Sneel return (EEXIST); 499241454Sneel } 500241454Sneel 501249435Sneel error = make_dev_p(MAKEDEV_CHECKNAME, &sc->cdev, &vmmdevsw, NULL, 502249435Sneel UID_ROOT, GID_WHEEL, 0600, "vmm/%s", buf); 503249435Sneel if (error != 0) { 504249435Sneel vmmdev_destroy(sc, TRUE); 505249435Sneel return (error); 506249435Sneel } 507221828Sgrehan sc->cdev->si_drv1 = sc; 508221828Sgrehan 509221828Sgrehan return (0); 510221828Sgrehan} 511221828SgrehanSYSCTL_PROC(_hw_vmm, OID_AUTO, create, CTLTYPE_STRING | CTLFLAG_RW, 512221828Sgrehan NULL, 0, sysctl_vmm_create, "A", NULL); 513221828Sgrehan 514221828Sgrehanvoid 515221828Sgrehanvmmdev_init(void) 516221828Sgrehan{ 517221828Sgrehan mtx_init(&vmmdev_mtx, "vmm device mutex", NULL, MTX_DEF); 518221828Sgrehan} 519221828Sgrehan 520241454Sneelint 521221828Sgrehanvmmdev_cleanup(void) 522221828Sgrehan{ 523241454Sneel int error; 524221828Sgrehan 525241454Sneel if (SLIST_EMPTY(&head)) 526241454Sneel error = 0; 527241454Sneel else 528241454Sneel error = EBUSY; 529221828Sgrehan 530241454Sneel return (error); 531221828Sgrehan} 532