/* Initializes a process to run virtual machine contexts, returning the number
* initialized, optionally setting errno */
int vmm_struct_init(struct proc *p, unsigned int nr_guest_pcores,
struct vmm_gpcore_init *u_gpcis, int flags)
{
struct vmm *vmm = &p->vmm;
unsigned int i;
struct vmm_gpcore_init gpci;
if (flags & ~VMM_ALL_FLAGS) {
set_errstr("%s: flags is 0x%lx, VMM_ALL_FLAGS is 0x%lx\n", __func__,
flags, VMM_ALL_FLAGS);
set_errno(EINVAL);
return 0;
}
vmm->flags = flags;
if (!x86_supports_vmx) {
set_errno(ENODEV);
return 0;
}
qlock(&vmm->qlock);
if (vmm->vmmcp) {
set_errno(EINVAL);
qunlock(&vmm->qlock);
return 0;
}
/* Set this early, so cleanup checks the gpc array */
vmm->vmmcp = TRUE;
nr_guest_pcores = MIN(nr_guest_pcores, num_cores);
vmm->amd = 0;
vmm->guest_pcores = kzmalloc(sizeof(void*) * nr_guest_pcores, KMALLOC_WAIT);
for (i = 0; i < nr_guest_pcores; i++) {
if (copy_from_user(&gpci, &u_gpcis[i],
sizeof(struct vmm_gpcore_init))) {
set_error(EINVAL, "Bad pointer %p for gps", u_gpcis);
break;
}
vmm->guest_pcores[i] = create_guest_pcore(p, &gpci);
/* If we failed, we'll clean it up when the process dies */
if (!vmm->guest_pcores[i]) {
set_errno(ENOMEM);
break;
}
}
vmm->nr_guest_pcores = i;
for (int i = 0; i < VMM_VMEXIT_NR_TYPES; i++)
vmm->vmexits[i] = 0;
qunlock(&vmm->qlock);
return i;
}
/* Initializes a process to run virtual machine contexts, returning the number
* initialized, throwing on error. */
int vmm_struct_init(struct proc *p, unsigned int nr_guest_pcores,
struct vmm_gpcore_init *u_gpcis, int flags)
{
ERRSTACK(1);
struct vmm *vmm = &p->vmm;
struct vmm_gpcore_init gpci;
if (flags & ~VMM_ALL_FLAGS)
error(EINVAL, "%s: flags is 0x%lx, VMM_ALL_FLAGS is 0x%lx\n", __func__,
flags, VMM_ALL_FLAGS);
vmm->flags = flags;
if (!x86_supports_vmx)
error(ENODEV, "This CPU does not support VMX");
qlock(&vmm->qlock);
if (waserror()) {
qunlock(&vmm->qlock);
nexterror();
}
/* TODO: just use an atomic test instead of all this locking stuff? */
if (vmm->vmmcp)
error(EAGAIN, "We're already running a vmmcp?");
/* Set this early, so cleanup checks the gpc array */
vmm->vmmcp = TRUE;
nr_guest_pcores = MIN(nr_guest_pcores, num_cores);
vmm->amd = 0;
vmm->guest_pcores = kzmalloc(sizeof(void *) * nr_guest_pcores, MEM_WAIT);
if (!vmm->guest_pcores)
error(ENOMEM, "Allocation of vmm->guest_pcores failed");
for (int i = 0; i < nr_guest_pcores; i++) {
if (copy_from_user(&gpci, &u_gpcis[i], sizeof(struct vmm_gpcore_init)))
error(EINVAL, "Bad pointer %p for gps", u_gpcis);
vmm->guest_pcores[i] = create_guest_pcore(p, &gpci);
vmm->nr_guest_pcores = i + 1;
}
for (int i = 0; i < VMM_VMEXIT_NR_TYPES; i++)
vmm->vmexits[i] = 0;
qunlock(&vmm->qlock);
poperror();
return vmm->nr_guest_pcores;
}
