Function vm_smp_rendezvous

freebsd/amd64/vmm/vmm.c:2545–2593

}

int
vm_smp_rendezvous(struct vm *vm, int vcpuid, cpuset_t dest,
    vm_rendezvous_func_t func, void *arg)
{
	int error, i;

	/*
	 * Enforce that this function is called without any locks
	 */
	WITNESS_WARN(WARN_PANIC, NULL, "vm_smp_rendezvous");
	KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < vm->maxcpus),
	    ("vm_smp_rendezvous: invalid vcpuid %d", vcpuid));

restart:
	mtx_lock(&vm->rendezvous_mtx);
	if (vm->rendezvous_func != NULL) {
		/*
		 * If a rendezvous is already in progress then we need to
		 * call the rendezvous handler in case this 'vcpuid' is one
		 * of the targets of the rendezvous.
		 */
		RENDEZVOUS_CTR0(vm, vcpuid, "Rendezvous already in progress");
		mtx_unlock(&vm->rendezvous_mtx);
		error = vm_handle_rendezvous(vm, vcpuid);
		if (error != 0)
			return (error);
		goto restart;
	}
	KASSERT(vm->rendezvous_func == NULL, ("vm_smp_rendezvous: previous "
	    "rendezvous is still in progress"));

	RENDEZVOUS_CTR0(vm, vcpuid, "Initiating rendezvous");
	vm->rendezvous_req_cpus = dest;
	CPU_ZERO(&vm->rendezvous_done_cpus);
	vm->rendezvous_arg = arg;
	vm->rendezvous_func = func;
	mtx_unlock(&vm->rendezvous_mtx);

	/*
	 * Wake up any sleeping vcpus and trigger a VM-exit in any running
	 * vcpus so they handle the rendezvous as soon as possible.
	 */
	for (i = 0; i < vm->maxcpus; i++) {
		if (CPU_ISSET(i, &dest))
			vcpu_notify_event(vm, i, false);
	}

	return (vm_handle_rendezvous(vm, vcpuid));
}

struct vatpic *
vm_atpic(struct vm *vm)