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Pull request for UEFI sub-system for v2019.07-rc5

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This pull request provides fixes for event services.
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Merge tag 'efi-2019-07-rc5' of git://git.denx.de/u-boot-efi

Pull request for UEFI sub-system for v2019.07-rc5

This pull request provides fixes for event services.
This commit is contained in:
Tom Rini 2019-06-12 07:15:38 -04:00
commit c2ea87883e
6 changed files with 102 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/efi_loader.h
View File

@ -256,6 +256,7 @@ struct efi_loaded_image_obj {
* struct efi_event
*
* @link: Link to list of all events
* @queue_link: Link to the list of queued events
* @type: Type of event, see efi_create_event
* @notify_tpl: Task priority level of notifications
* @nofify_function: Function to call when the event is triggered
@ -264,11 +265,11 @@ struct efi_loaded_image_obj {
* @trigger_time: Period of the timer
* @trigger_next: Next time to trigger the timer
* @trigger_type: Type of timer, see efi_set_timer
* @is_queued: The notification function is queued
* @is_signaled: The event occurred. The event is in the signaled state.
*/
struct efi_event {
struct list_head link;
struct list_head queue_link;
uint32_t type;
efi_uintn_t notify_tpl;
void (EFIAPI *notify_function)(struct efi_event *event, void *context);
@ -277,7 +278,6 @@ struct efi_event {
u64 trigger_next;
u64 trigger_time;
enum efi_timer_delay trigger_type;
bool is_queued;
bool is_signaled;
};
@ -432,7 +432,7 @@ efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
uint64_t trigger_time);
/* Call this to signal an event */
void efi_signal_event(struct efi_event *event, bool check_tpl);
void efi_signal_event(struct efi_event *event);
/* open file system: */
struct efi_simple_file_system_protocol *efi_simple_file_system(

131
lib/efi_loader/efi_boottime.c
View File

@ -27,6 +27,12 @@ LIST_HEAD(efi_obj_list);
/* List of all events */
LIST_HEAD(efi_events);
/* List of queued events */
LIST_HEAD(efi_event_queue);
/* Flag to disable timer activity in ExitBootServices() */
static bool timers_enabled = true;
/* List of all events registered by RegisterProtocolNotify() */
LIST_HEAD(efi_register_notify_events);
@ -160,33 +166,76 @@ const char *__efi_nesting_dec(void)
return indent_string(--nesting_level);
}
/**
* efi_event_is_queued() - check if an event is queued
*
* @event: event
* Return: true if event is queued
*/
static bool efi_event_is_queued(struct efi_event *event)
{
return !!event->queue_link.next;
}
/**
* efi_process_event_queue() - process event queue
*/
static void efi_process_event_queue(void)
{
while (!list_empty(&efi_event_queue)) {
struct efi_event *event;
efi_uintn_t old_tpl;
event = list_first_entry(&efi_event_queue, struct efi_event,
queue_link);
if (efi_tpl >= event->notify_tpl)
return;
list_del(&event->queue_link);
event->queue_link.next = NULL;
event->queue_link.prev = NULL;
/* Events must be executed at the event's TPL */
old_tpl = efi_tpl;
efi_tpl = event->notify_tpl;
EFI_CALL_VOID(event->notify_function(event,
event->notify_context));
efi_tpl = old_tpl;
if (event->type == EVT_NOTIFY_SIGNAL)
event->is_signaled = 0;
}
}
/**
* efi_queue_event() - queue an EFI event
* @event: event to signal
* @check_tpl: check the TPL level
*
* This function queues the notification function of the event for future
* execution.
*
* The notification function is called if the task priority level of the event
* is higher than the current task priority level.
*
* For the SignalEvent service see efi_signal_event_ext.
*
*/
static void efi_queue_event(struct efi_event *event, bool check_tpl)
static void efi_queue_event(struct efi_event *event)
{
if (event->notify_function) {
event->is_queued = true;
/* Check TPL */
if (check_tpl && efi_tpl >= event->notify_tpl)
return;
event->is_queued = false;
EFI_CALL_VOID(event->notify_function(event,
event->notify_context));
} else {
event->is_queued = false;
struct efi_event *item = NULL;
if (!event->notify_function)
return;
if (!efi_event_is_queued(event)) {
/*
* Events must be notified in order of decreasing task priority
* level. Insert the new event accordingly.
*/
list_for_each_entry(item, &efi_event_queue, queue_link) {
if (item->notify_tpl < event->notify_tpl) {
list_add_tail(&event->queue_link,
&item->queue_link);
event = NULL;
break;
}
}
if (event)
list_add_tail(&event->queue_link, &efi_event_queue);
}
efi_process_event_queue();
}
/**
@ -211,7 +260,6 @@ efi_status_t is_valid_tpl(efi_uintn_t tpl)
/**
* efi_signal_event() - signal an EFI event
* @event: event to signal
* @check_tpl: check the TPL level
*
* This function signals an event. If the event belongs to an event group all
* events of the group are signaled. If they are of type EVT_NOTIFY_SIGNAL
@ -219,8 +267,10 @@ efi_status_t is_valid_tpl(efi_uintn_t tpl)
*
* For the SignalEvent service see efi_signal_event_ext.
*/
void efi_signal_event(struct efi_event *event, bool check_tpl)
void efi_signal_event(struct efi_event *event)
{
if (event->is_signaled)
return;
if (event->group) {
struct efi_event *evt;
@ -234,20 +284,15 @@ void efi_signal_event(struct efi_event *event, bool check_tpl)
if (evt->is_signaled)
continue;
evt->is_signaled = true;
if (evt->type & EVT_NOTIFY_SIGNAL &&
evt->notify_function)
evt->is_queued = true;
}
list_for_each_entry(evt, &efi_events, link) {
if (!evt->group || guidcmp(evt->group, event->group))
continue;
if (evt->is_queued)
efi_queue_event(evt, check_tpl);
efi_queue_event(evt);
}
} else {
event->is_signaled = true;
if (event->type & EVT_NOTIFY_SIGNAL)
efi_queue_event(event, check_tpl);
efi_queue_event(event);
}
}
@ -637,8 +682,6 @@ efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl,
evt->group = group;
/* Disable timers on boot up */
evt->trigger_next = -1ULL;
evt->is_queued = false;
evt->is_signaled = false;
list_add_tail(&evt->link, &efi_events);
*event = evt;
return EFI_SUCCESS;
@ -733,8 +776,8 @@ void efi_timer_check(void)
u64 now = timer_get_us();
list_for_each_entry(evt, &efi_events, link) {
if (evt->is_queued)
efi_queue_event(evt, true);
if (!timers_enabled)
continue;
if (!(evt->type & EVT_TIMER) || now < evt->trigger_next)
continue;
switch (evt->trigger_type) {
@ -748,8 +791,9 @@ void efi_timer_check(void)
continue;
}
evt->is_signaled = false;
efi_signal_event(evt, true);
efi_signal_event(evt);
}
efi_process_event_queue();
WATCHDOG_RESET();
}
@ -850,7 +894,7 @@ static efi_status_t EFIAPI efi_wait_for_event(efi_uintn_t num_events,
if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL)
return EFI_EXIT(EFI_INVALID_PARAMETER);
if (!event[i]->is_signaled)
efi_queue_event(event[i], true);
efi_queue_event(event[i]);
}
/* Wait for signal */
@ -894,7 +938,7 @@ static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event)
EFI_ENTRY("%p", event);
if (efi_is_event(event) != EFI_SUCCESS)
return EFI_EXIT(EFI_INVALID_PARAMETER);
efi_signal_event(event, true);
efi_signal_event(event);
return EFI_EXIT(EFI_SUCCESS);
}
@ -933,6 +977,9 @@ static efi_status_t EFIAPI efi_close_event(struct efi_event *event)
free(item);
}
}
/* Remove event from queue */
if (efi_event_is_queued(event))
list_del(&event->queue_link);
list_del(&event->link);
free(event);
@ -961,7 +1008,7 @@ static efi_status_t EFIAPI efi_check_event(struct efi_event *event)
event->type & EVT_NOTIFY_SIGNAL)
return EFI_EXIT(EFI_INVALID_PARAMETER);
if (!event->is_signaled)
efi_queue_event(event, true);
efi_queue_event(event);
if (event->is_signaled) {
event->is_signaled = false;
return EFI_EXIT(EFI_SUCCESS);
@ -1068,7 +1115,8 @@ efi_status_t efi_add_protocol(const efi_handle_t handle,
}
notif->handle = handle;
list_add_tail(&notif->link, &event->handles);
efi_signal_event(event->event, true);
event->event->is_signaled = false;
efi_signal_event(event->event);
}
}
@ -1593,7 +1641,7 @@ out:
/* Notify that the configuration table was changed */
list_for_each_entry(evt, &efi_events, link) {
if (evt->group && !guidcmp(evt->group, guid)) {
efi_signal_event(evt, false);
efi_signal_event(evt);
break;
}
}
@ -1899,13 +1947,13 @@ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle,
if (map_key != efi_memory_map_key)
return EFI_INVALID_PARAMETER;
/* Make sure that notification functions are not called anymore */
efi_tpl = TPL_HIGH_LEVEL;
/* Check if ExitBootServices has already been called */
if (!systab.boottime)
return EFI_EXIT(EFI_SUCCESS);
/* Stop all timer related activities */
timers_enabled = false;
/* Add related events to the event group */
list_for_each_entry(evt, &efi_events, link) {
if (evt->type == EVT_SIGNAL_EXIT_BOOT_SERVICES)
@ -1916,11 +1964,14 @@ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle,
if (evt->group &&
!guidcmp(evt->group,
&efi_guid_event_group_exit_boot_services)) {
efi_signal_event(evt, false);
efi_signal_event(evt);
break;
}
}
/* Make sure that notification functions are not called anymore */
efi_tpl = TPL_HIGH_LEVEL;
/* TODO: Should persist EFI variables here */
board_quiesce_devices();

4
lib/efi_loader/efi_console.c
View File

@ -704,7 +704,7 @@ static void efi_cin_check(void)
efi_status_t ret;
if (key_available) {
efi_signal_event(efi_con_in.wait_for_key, true);
efi_signal_event(efi_con_in.wait_for_key);
return;
}
@ -718,7 +718,7 @@ static void efi_cin_check(void)
/* Queue the wait for key event */
if (key_available)
efi_signal_event(efi_con_in.wait_for_key, true);
efi_signal_event(efi_con_in.wait_for_key);
}
}
}

2
lib/efi_loader/efi_memory.c
View File

@ -321,7 +321,7 @@ uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
if (evt->group &&
!guidcmp(evt->group,
&efi_guid_event_group_memory_map_change)) {
efi_signal_event(evt, false);
efi_signal_event(evt);
break;
}
}

2
lib/efi_loader/efi_runtime.c
View File

@ -130,7 +130,7 @@ static void EFIAPI efi_reset_system_boottime(
if (evt->group &&
!guidcmp(evt->group,
&efi_guid_event_group_reset_system)) {
efi_signal_event(evt, false);
efi_signal_event(evt);
break;
}
}

9
lib/efi_selftest/efi_selftest_event_groups.c
View File

@ -80,12 +80,11 @@ static int execute(void)
return EFI_ST_FAILURE;
}
for (j = 0; j < GROUP_SIZE; ++j) {
if (counter[j] != i) {
if (counter[j] != 2 * i + 1) {
efi_st_printf("i %u, j %u, count %u\n",
(unsigned int)i, (unsigned int)j,
(unsigned int)counter[j]);
efi_st_error(
"Notification function was called\n");
efi_st_error("Notification function was not called\n");
return EFI_ST_FAILURE;
}
/* Clear signaled state */
@ -94,7 +93,7 @@ static int execute(void)
efi_st_error("Event was not signaled\n");
return EFI_ST_FAILURE;
}
if (counter[j] != i) {
if (counter[j] != 2 * i + 1) {
efi_st_printf("i %u, j %u, count %u\n",
(unsigned int)i, (unsigned int)j,
(unsigned int)counter[j]);
@ -109,7 +108,7 @@ static int execute(void)
"Signaled state not cleared\n");
return EFI_ST_FAILURE;
}
if (counter[j] != i + 1) {
if (counter[j] != 2 * i + 2) {
efi_st_printf("i %u, j %u, count %u\n",
(unsigned int)i, (unsigned int)j,
(unsigned int)counter[j]);