static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr)
{
acpi_handle handle = pr->handle;
if (!is_processor_present(handle)) {
return AE_ERROR;
}
if (acpi_map_lsapic(handle, &pr->id))
return AE_ERROR;
if (arch_register_cpu(pr->id)) {
acpi_unmap_lsapic(pr->id);
return AE_ERROR;
}
/* CPU got hot-plugged, but cpu_data is not initialized yet
* Set flag to delay cpu_idle/throttling initialization
* in:
* acpi_processor_add()
* acpi_processor_get_info()
* and do it when the CPU gets online the first time
* TBD: Cleanup above functions and try to do this more elegant.
*/
printk(KERN_INFO "CPU %d got hotplugged\n", pr->id);
pr->flags.need_hotplug_init = 1;
return AE_OK;
}
static void __ref acpi_processor_hotplug_notify(acpi_handle handle,
u32 event, void *data)
{
struct acpi_processor *pr;
struct acpi_device *device = NULL;
int result;
#ifdef __i386__
/*
* BZ 600435 -- disable physical CPU Hotplug (hot add) for
* 32-bit kernel. This code block must be removed if hot add is
* re-enabled for 32-bit
*/
mark_hardware_unsupported("CPU Hot Add is not supported for x86 32-bit.\n");
#endif
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Processor driver received %s event\n",
(event == ACPI_NOTIFY_BUS_CHECK) ?
"ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"));
if (!is_processor_present(handle))
break;
if (acpi_bus_get_device(handle, &device)) {
result = acpi_processor_device_add(handle, &device);
if (result)
printk(KERN_ERR PREFIX
"Unable to add the device\n");
break;
}
break;
case ACPI_NOTIFY_EJECT_REQUEST:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"received ACPI_NOTIFY_EJECT_REQUEST\n"));
if (acpi_bus_get_device(handle, &device)) {
printk(KERN_ERR PREFIX
"Device don't exist, dropping EJECT\n");
break;
}
pr = acpi_driver_data(device);
if (!pr) {
printk(KERN_ERR PREFIX
"Driver data is NULL, dropping EJECT\n");
return;
}
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
return;
}
static void __ref acpi_processor_hotplug_notify(acpi_handle handle,
u32 event, void *data)
{
struct acpi_processor *pr;
struct acpi_device *device = NULL;
int result;
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Processor driver received %s event\n",
(event == ACPI_NOTIFY_BUS_CHECK) ?
"ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"));
if (!is_processor_present(handle))
break;
if (acpi_bus_get_device(handle, &device)) {
result = acpi_processor_device_add(handle, &device);
if (result)
printk(KERN_ERR PREFIX
"Unable to add the device\n");
break;
}
pr = acpi_driver_data(device);
if (processor_cntl_external() && pr)
processor_notify_external(pr,
PROCESSOR_HOTPLUG, HOTPLUG_TYPE_ADD);
break;
case ACPI_NOTIFY_EJECT_REQUEST:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"received ACPI_NOTIFY_EJECT_REQUEST\n"));
if (acpi_bus_get_device(handle, &device)) {
printk(KERN_ERR PREFIX
"Device don't exist, dropping EJECT\n");
break;
}
pr = acpi_driver_data(device);
if (!pr) {
printk(KERN_ERR PREFIX
"Driver data is NULL, dropping EJECT\n");
return;
}
if (processor_cntl_external())
processor_notify_external(pr, PROCESSOR_HOTPLUG,
HOTPLUG_TYPE_REMOVE);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
return;
}
static acpi_status xen_acpi_cpu_hotadd(struct acpi_processor *pr)
{
if (!is_processor_present(pr->handle))
return AE_ERROR;
pr->id = xen_hotadd_cpu(pr);
if ((int)pr->id < 0)
return AE_ERROR;
/*
* Sync with Xen hypervisor, providing new /sys/.../xen_cpuX
* interface after cpu hotadded.
*/
xen_pcpu_hotplug_sync();
return AE_OK;
}
static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
{
if (!is_processor_present(handle)) {
return AE_ERROR;
}
if (acpi_map_lsapic(handle, p_cpu))
return AE_ERROR;
if (arch_register_cpu(*p_cpu)) {
acpi_unmap_lsapic(*p_cpu);
return AE_ERROR;
}
return AE_OK;
}
static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
{
ACPI_FUNCTION_TRACE("acpi_processor_hotadd_init");
if (!is_processor_present(handle)) {
return_VALUE(AE_ERROR);
}
if (acpi_map_lsapic(handle, p_cpu))
return_VALUE(AE_ERROR);
if (arch_register_cpu(*p_cpu)) {
acpi_unmap_lsapic(*p_cpu);
return_VALUE(AE_ERROR);
}
return_VALUE(AE_OK);
}
static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr)
{
acpi_handle handle = pr->handle;
if (!is_processor_present(handle)) {
return AE_ERROR;
}
if (acpi_map_lsapic(handle, &pr->id))
return AE_ERROR;
if (arch_register_cpu(pr->id)) {
acpi_unmap_lsapic(pr->id);
return AE_ERROR;
}
printk(KERN_INFO "CPU %d got hotplugged\n", pr->id);
pr->flags.need_hotplug_init = 1;
return AE_OK;
}
static void acpi_processor_hotplug_notify(acpi_handle handle,
u32 event, void *data)
{
struct acpi_processor *pr;
struct acpi_device *device = NULL;
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
int result;
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Processor driver received %s event\n",
(event == ACPI_NOTIFY_BUS_CHECK) ?
"ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"));
if (!is_processor_present(handle))
break;
if (!acpi_bus_get_device(handle, &device))
break;
result = acpi_processor_device_add(handle, &device);
if (result) {
pr_err(PREFIX "Unable to add the device\n");
break;
}
ost_code = ACPI_OST_SC_SUCCESS;
break;
case ACPI_NOTIFY_EJECT_REQUEST:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"received ACPI_NOTIFY_EJECT_REQUEST\n"));
if (acpi_bus_get_device(handle, &device)) {
pr_err(PREFIX "Device don't exist, dropping EJECT\n");
break;
}
pr = acpi_driver_data(device);
if (!pr) {
pr_err(PREFIX "Driver data is NULL, dropping EJECT\n");
break;
}
/*
* TBD: implement acpi_processor_device_remove if Xen support
* CPU hotremove in the future.
*/
acpi_processor_device_remove(device);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
/* non-hotplug event; possibly handled by other handler */
return;
}
(void) acpi_evaluate_hotplug_ost(handle, event, ost_code, NULL);
return;
}
static void
acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data)
{
struct acpi_processor *pr;
struct acpi_device *device = NULL;
int result;
ACPI_FUNCTION_TRACE("acpi_processor_hotplug_notify");
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
printk("Processor driver received %s event\n",
(event == ACPI_NOTIFY_BUS_CHECK) ?
"ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK");
if (!is_processor_present(handle))
break;
if (acpi_bus_get_device(handle, &device)) {
result = acpi_processor_device_add(handle, &device);
if (result)
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Unable to add the device\n"));
break;
}
pr = acpi_driver_data(device);
if (!pr) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Driver data is NULL\n"));
break;
}
if (pr->id >= 0 && (pr->id < NR_CPUS)) {
kobject_hotplug(&device->kobj, KOBJ_OFFLINE);
break;
}
result = acpi_processor_start(device);
if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) {
kobject_hotplug(&device->kobj, KOBJ_ONLINE);
} else {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Device [%s] failed to start\n",
acpi_device_bid(device)));
}
break;
case ACPI_NOTIFY_EJECT_REQUEST:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"received ACPI_NOTIFY_EJECT_REQUEST\n"));
if (acpi_bus_get_device(handle, &device)) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Device don't exist, dropping EJECT\n"));
break;
}
pr = acpi_driver_data(device);
if (!pr) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Driver data is NULL, dropping EJECT\n"));
return_VOID;
}
if ((pr->id < NR_CPUS) && (cpu_present(pr->id)))
kobject_hotplug(&device->kobj, KOBJ_OFFLINE);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
return_VOID;
}
static void acpi_processor_hotplug_notify(acpi_handle handle,
u32 event, void *data)
{
struct acpi_processor *pr;
struct acpi_device *device = NULL;
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
int result;
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Processor driver received %s event\n",
(event == ACPI_NOTIFY_BUS_CHECK) ?
"ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"));
if (!is_processor_present(handle))
break;
if (!acpi_bus_get_device(handle, &device))
break;
result = acpi_processor_device_add(handle, &device);
if (result) {
printk(KERN_ERR PREFIX "Unable to add the device\n");
break;
}
ost_code = ACPI_OST_SC_SUCCESS;
break;
case ACPI_NOTIFY_EJECT_REQUEST:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"received ACPI_NOTIFY_EJECT_REQUEST\n"));
if (acpi_bus_get_device(handle, &device)) {
printk(KERN_ERR PREFIX
"Device don't exist, dropping EJECT\n");
break;
}
pr = acpi_driver_data(device);
if (!pr) {
printk(KERN_ERR PREFIX
"Driver data is NULL, dropping EJECT\n");
break;
}
/* REVISIT: update when eject is supported */
ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
/* non-hotplug event; possibly handled by other handler */
return;
}
/* Inform firmware that the hotplug operation has completed */
(void) acpi_evaluate_hotplug_ost(handle, event, ost_code, NULL);
return;
}
static void acpi_processor_hotplug_notify(acpi_handle handle,
u32 event, void *data)
{
struct acpi_device *device = NULL;
struct acpi_eject_event *ej_event = NULL;
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
acpi_status status;
int result;
acpi_scan_lock_acquire();
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Processor driver received %s event\n",
(event == ACPI_NOTIFY_BUS_CHECK) ?
"ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"));
if (!is_processor_present(handle))
break;
if (!acpi_bus_get_device(handle, &device))
break;
result = acpi_bus_scan(handle);
if (result) {
acpi_handle_err(handle, "Unable to add the device\n");
break;
}
result = acpi_bus_get_device(handle, &device);
if (result) {
acpi_handle_err(handle, "Missing device object\n");
break;
}
ost_code = ACPI_OST_SC_SUCCESS;
break;
case ACPI_NOTIFY_EJECT_REQUEST:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"received ACPI_NOTIFY_EJECT_REQUEST\n"));
if (acpi_bus_get_device(handle, &device)) {
acpi_handle_err(handle,
"Device don't exist, dropping EJECT\n");
break;
}
if (!acpi_driver_data(device)) {
acpi_handle_err(handle,
"Driver data is NULL, dropping EJECT\n");
break;
}
ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL);
if (!ej_event) {
acpi_handle_err(handle, "No memory, dropping EJECT\n");
break;
}
get_device(&device->dev);
ej_event->device = device;
ej_event->event = ACPI_NOTIFY_EJECT_REQUEST;
/* The eject is carried out asynchronously. */
status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device,
ej_event);
if (ACPI_FAILURE(status)) {
put_device(&device->dev);
kfree(ej_event);
break;
}
goto out;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
/* non-hotplug event; possibly handled by other handler */
goto out;
}
/* Inform firmware that the hotplug operation has completed */
(void) acpi_evaluate_hotplug_ost(handle, event, ost_code, NULL);
out:
acpi_scan_lock_release();
}
