diff options
Diffstat (limited to 'lib/efi_selftest/efi_selftest_tpl.c')
| -rw-r--r-- | lib/efi_selftest/efi_selftest_tpl.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/lib/efi_selftest/efi_selftest_tpl.c b/lib/efi_selftest/efi_selftest_tpl.c new file mode 100644 index 0000000000..90ace0f51e --- /dev/null +++ b/lib/efi_selftest/efi_selftest_tpl.c @@ -0,0 +1,214 @@ +/* + * efi_selftest_events + * + * Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de> + * + * SPDX-License-Identifier: GPL-2.0+ + * + * This unit test uses timer events to check the handling of + * task priority levels. + */ + +#include <efi_selftest.h> + +static struct efi_event *event_notify; +static struct efi_event *event_wait; +static unsigned int counter; +static struct efi_boot_services *boottime; + +/* + * Notification function, increments a counter. + * + * @event notified event + * @context pointer to the counter + */ +static void EFIAPI notify(struct efi_event *event, void *context) +{ + if (!context) + return; + ++*(unsigned int *)context; +} + +/* + * Setup unit test. + * + * Create two timer events. + * One with EVT_NOTIFY_SIGNAL, the other with EVT_NOTIFY_WAIT. + * + * @handle: handle of the loaded image + * @systable: system table + */ +static int setup(const efi_handle_t handle, + const struct efi_system_table *systable) +{ + efi_status_t ret; + + boottime = systable->boottime; + + ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_SIGNAL, + TPL_CALLBACK, notify, (void *)&counter, + &event_notify); + if (ret != EFI_SUCCESS) { + efi_st_error("could not create event\n"); + return 1; + } + ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_WAIT, + TPL_HIGH_LEVEL, notify, NULL, &event_wait); + if (ret != EFI_SUCCESS) { + efi_st_error("could not create event\n"); + return 1; + } + return 0; +} + +/* + * Tear down unit test. + * + * Close the events created in setup. + */ +static int teardown(void) +{ + efi_status_t ret; + + if (event_notify) { + ret = boottime->close_event(event_notify); + event_notify = NULL; + if (ret != EFI_SUCCESS) { + efi_st_error("could not close event\n"); + return 1; + } + } + if (event_wait) { + ret = boottime->close_event(event_wait); + event_wait = NULL; + if (ret != EFI_SUCCESS) { + efi_st_error("could not close event\n"); + return 1; + } + } + boottime->restore_tpl(TPL_APPLICATION); + return 0; +} + +/* + * Execute unit test. + * + * Run a 10 ms periodic timer and check that it is called 10 times + * while waiting for 100 ms single shot timer. + * + * Raise the TPL level to the level of the 10 ms timer and observe + * that the notification function is not called again. + * + * Lower the TPL level and check that the queued notification + * function is called. + */ +static int execute(void) +{ + unsigned long index; + efi_status_t ret; + UINTN old_tpl; + + /* Set 10 ms timer */ + counter = 0; + ret = boottime->set_timer(event_notify, EFI_TIMER_PERIODIC, 100000); + if (ret != EFI_SUCCESS) { + efi_st_error("Could not set timer\n"); + return 1; + } + /* Set 100 ms timer */ + ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000000); + if (ret != EFI_SUCCESS) { + efi_st_error("Could not set timer\n"); + return 1; + } + index = 5; + ret = boottime->wait_for_event(1, &event_wait, &index); + if (ret != EFI_SUCCESS) { + efi_st_error("Could not wait for event\n"); + return 1; + } + ret = boottime->check_event(event_wait); + if (ret != EFI_NOT_READY) { + efi_st_error("Signaled state was not cleared.\n"); + efi_st_printf("ret = %u\n", (unsigned int)ret); + return 1; + } + if (index != 0) { + efi_st_error("WaitForEvent returned wrong index\n"); + return 1; + } + efi_st_printf("Counter with TPL level TPL_APPLICATION: %u\n", counter); + if (counter < 8 || counter > 12) { + efi_st_error("Incorrect timing of events\n"); + return 1; + } + ret = boottime->set_timer(event_notify, EFI_TIMER_STOP, 0); + if (index != 0) { + efi_st_error("Could not cancel timer\n"); + return 1; + } + /* Raise TPL level */ + old_tpl = boottime->raise_tpl(TPL_CALLBACK); + if (old_tpl != TPL_APPLICATION) { + efi_st_error("Initial TPL level was not TPL_APPLICATION"); + return 1; + } + /* Set 10 ms timer */ + counter = 0; + ret = boottime->set_timer(event_notify, EFI_TIMER_PERIODIC, 100000); + if (index != 0) { + efi_st_error("Could not set timer\n"); + return 1; + } + /* Set 100 ms timer */ + ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000000); + if (ret != EFI_SUCCESS) { + efi_st_error("Could not set timer\n"); + return 1; + } + do { + ret = boottime->check_event(event_wait); + } while (ret == EFI_NOT_READY); + if (ret != EFI_SUCCESS) { + efi_st_error("Could not check event\n"); + return 1; + } + efi_st_printf("Counter with TPL level TPL_CALLBACK: %u\n", counter); + if (counter != 0) { + efi_st_error("Suppressed timer fired\n"); + return 1; + } + /* Set 1 ms timer */ + ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000); + if (ret != EFI_SUCCESS) { + efi_st_error("Could not set timer\n"); + return 1; + } + /* Restore the old TPL level */ + boottime->restore_tpl(TPL_APPLICATION); + ret = boottime->wait_for_event(1, &event_wait, &index); + if (ret != EFI_SUCCESS) { + efi_st_error("Could not wait for event\n"); + return 1; + } + efi_st_printf("Counter with TPL level TPL_APPLICATION: %u\n", counter); + if (counter < 1) { + efi_st_error("Queued timer event did not fire\n"); + return 1; + } + ret = boottime->set_timer(event_wait, EFI_TIMER_STOP, 0); + if (index != 0) { + efi_st_error("Could not cancel timer\n"); + return 1; + } + + return 0; +} + +EFI_UNIT_TEST(tpl) = { + .name = "task priority levels", + .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT, + .setup = setup, + .execute = execute, + .teardown = teardown, +}; |