void xencons_attach(device_t parent, device_t self, void *aux) { struct xencons_softc *sc = device_private(self); aprint_normal(": Xen Virtual Console Driver\n"); sc->sc_dev = self; sc->sc_tty = tty_alloc(); tty_attach(sc->sc_tty); sc->sc_tty->t_oproc = xencons_start; sc->sc_tty->t_param = xencons_param; if (xencons_isconsole) { int maj; /* Locate the major number. */ maj = cdevsw_lookup_major(&xencons_cdevsw); /* There can be only one, but it can have any unit number. */ cn_tab->cn_dev = makedev(maj, device_unit(self)); aprint_verbose_dev(self, "console major %d, unit %d\n", maj, device_unit(self)); sc->sc_tty->t_dev = cn_tab->cn_dev; #ifdef DDB /* Set db_max_line to avoid paging. */ db_max_line = 0x7fffffff; #endif xencons_console_device = sc; xencons_resume(self, PMF_Q_NONE); } sc->polling = 0; if (!pmf_device_register(self, xencons_suspend, xencons_resume)) aprint_error_dev(self, "couldn't establish power handler\n"); }
static int __do_suspend(void *ignore) { int err; extern void time_resume(void); BUG_ON(smp_processor_id() != 0); BUG_ON(in_interrupt()); #if defined(__i386__) || defined(__x86_64__) if (xen_feature(XENFEAT_auto_translated_physmap)) { printk(KERN_WARNING "Cannot suspend in " "auto_translated_physmap mode.\n"); return -EOPNOTSUPP; } #endif err = smp_suspend(); if (err) return err; xenbus_suspend(); preempt_disable(); #ifdef __i386__ kmem_cache_shrink(pgd_cache); #endif mm_pin_all(); local_irq_disable(); preempt_enable(); gnttab_suspend(); pre_suspend(); /* * We'll stop somewhere inside this hypercall. When it returns, * we'll start resuming after the restore. */ HYPERVISOR_suspend(virt_to_mfn(xen_start_info)); shutting_down = SHUTDOWN_INVALID; post_suspend(); gnttab_resume(); irq_resume(); time_resume(); switch_idle_mm(); local_irq_enable(); xencons_resume(); xenbus_resume(); smp_resume(); return err; }
static int __do_suspend(void *ignore) { int i, j, k, fpp, err; extern unsigned long max_pfn; extern unsigned long *pfn_to_mfn_frame_list_list; extern unsigned long *pfn_to_mfn_frame_list[]; extern void time_resume(void); BUG_ON(smp_processor_id() != 0); BUG_ON(in_interrupt()); if (xen_feature(XENFEAT_auto_translated_physmap)) { printk(KERN_WARNING "Cannot suspend in " "auto_translated_physmap mode.\n"); return -EOPNOTSUPP; } err = smp_suspend(); if (err) return err; xenbus_suspend(); preempt_disable(); #ifdef __i386__ kmem_cache_shrink(pgd_cache); #endif mm_pin_all(); __cli(); preempt_enable(); gnttab_suspend(); HYPERVISOR_shared_info = (shared_info_t *)empty_zero_page; clear_fixmap(FIX_SHARED_INFO); xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn); xen_start_info->console_mfn = mfn_to_pfn(xen_start_info->console_mfn); /* * We'll stop somewhere inside this hypercall. When it returns, * we'll start resuming after the restore. */ HYPERVISOR_suspend(virt_to_mfn(xen_start_info)); shutting_down = SHUTDOWN_INVALID; set_fixmap(FIX_SHARED_INFO, xen_start_info->shared_info); HYPERVISOR_shared_info = (shared_info_t *)fix_to_virt(FIX_SHARED_INFO); memset(empty_zero_page, 0, PAGE_SIZE); HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list = virt_to_mfn(pfn_to_mfn_frame_list_list); fpp = PAGE_SIZE/sizeof(unsigned long); for (i = 0, j = 0, k = -1; i < max_pfn; i += fpp, j++) { if ((j % fpp) == 0) { k++; pfn_to_mfn_frame_list_list[k] = virt_to_mfn(pfn_to_mfn_frame_list[k]); j = 0; } pfn_to_mfn_frame_list[k][j] = virt_to_mfn(&phys_to_machine_mapping[i]); } HYPERVISOR_shared_info->arch.max_pfn = max_pfn; gnttab_resume(); irq_resume(); time_resume(); switch_idle_mm(); __sti(); xencons_resume(); xenbus_resume(); smp_resume(); return err; }
/* Full PV mode suspension. */ static void xctrl_suspend() { int i, j, k, fpp, suspend_cancelled; unsigned long max_pfn, start_info_mfn; EVENTHANDLER_INVOKE(power_suspend); #ifdef SMP struct thread *td; cpuset_t map; u_int cpuid; /* * Bind us to CPU 0 and stop any other VCPUs. */ td = curthread; thread_lock(td); sched_bind(td, 0); thread_unlock(td); cpuid = PCPU_GET(cpuid); KASSERT(cpuid == 0, ("xen_suspend: not running on cpu 0")); map = all_cpus; CPU_CLR(cpuid, &map); CPU_NAND(&map, &stopped_cpus); if (!CPU_EMPTY(&map)) stop_cpus(map); #endif /* * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE * drivers need this. */ mtx_lock(&Giant); if (DEVICE_SUSPEND(root_bus) != 0) { mtx_unlock(&Giant); printf("%s: device_suspend failed\n", __func__); #ifdef SMP if (!CPU_EMPTY(&map)) restart_cpus(map); #endif return; } mtx_unlock(&Giant); local_irq_disable(); xencons_suspend(); gnttab_suspend(); intr_suspend(); max_pfn = HYPERVISOR_shared_info->arch.max_pfn; void *shared_info = HYPERVISOR_shared_info; HYPERVISOR_shared_info = NULL; pmap_kremove((vm_offset_t) shared_info); PT_UPDATES_FLUSH(); xen_start_info->store_mfn = MFNTOPFN(xen_start_info->store_mfn); xen_start_info->console.domU.mfn = MFNTOPFN(xen_start_info->console.domU.mfn); /* * We'll stop somewhere inside this hypercall. When it returns, * we'll start resuming after the restore. */ start_info_mfn = VTOMFN(xen_start_info); pmap_suspend(); suspend_cancelled = HYPERVISOR_suspend(start_info_mfn); pmap_resume(); pmap_kenter_ma((vm_offset_t) shared_info, xen_start_info->shared_info); HYPERVISOR_shared_info = shared_info; HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list = VTOMFN(xen_pfn_to_mfn_frame_list_list); fpp = PAGE_SIZE/sizeof(unsigned long); for (i = 0, j = 0, k = -1; i < max_pfn; i += fpp, j++) { if ((j % fpp) == 0) { k++; xen_pfn_to_mfn_frame_list_list[k] = VTOMFN(xen_pfn_to_mfn_frame_list[k]); j = 0; } xen_pfn_to_mfn_frame_list[k][j] = VTOMFN(&xen_phys_machine[i]); } HYPERVISOR_shared_info->arch.max_pfn = max_pfn; gnttab_resume(); intr_resume(suspend_cancelled != 0); local_irq_enable(); xencons_resume(); #ifdef CONFIG_SMP for_each_cpu(i) vcpu_prepare(i); #endif /* * Only resume xenbus /after/ we've prepared our VCPUs; otherwise * the VCPU hotplug callback can race with our vcpu_prepare */ mtx_lock(&Giant); DEVICE_RESUME(root_bus); mtx_unlock(&Giant); #ifdef SMP thread_lock(curthread); sched_unbind(curthread); thread_unlock(curthread); if (!CPU_EMPTY(&map)) restart_cpus(map); #endif EVENTHANDLER_INVOKE(power_resume); }