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/* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "ec_commands.h"
#include "ec_tasks.h"
#include "host_command.h"
#include "panic.h"
#include "system.h"
#include "system_fake.h"
#include "system_safe_mode.h"
#include <zephyr/fff.h>
#include <zephyr/kernel.h>
#include <zephyr/ztest.h>
FAKE_VOID_FUNC(system_reset, int);
static void system_before(void *data)
{
RESET_FAKE(system_reset);
set_system_safe_mode(false);
get_panic_data_write()->flags = 0;
system_set_shrspi_image_copy(EC_IMAGE_RW);
}
static void enter_safe_mode_cb(struct k_timer *unused)
{
k_sys_fatal_error_handler(K_ERR_CPU_EXCEPTION, NULL);
}
K_TIMER_DEFINE(enter_safe_mode, enter_safe_mode_cb, NULL);
ZTEST_USER(system_safe_mode, test_safe_mode_from_critical_task)
{
/**
* Timer callback will run in sysworkq, which is a critical
* thread, so safe mode should not run.
*/
k_timer_start(&enter_safe_mode, K_NO_WAIT, K_NO_WAIT);
/* Short wait to ensure enter_safe_mode_cb has a chance to run */
k_msleep(100);
zassert_false(system_is_in_safe_mode());
zassert_false(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_STARTED);
zassert_true(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_FAIL_PRECONDITIONS);
zassert_equal(1, system_reset_fake.call_count);
}
ZTEST_USER(system_safe_mode, test_enter_safe_mode_from_ro)
{
system_set_shrspi_image_copy(EC_IMAGE_RO);
k_sys_fatal_error_handler(K_ERR_CPU_EXCEPTION, NULL);
zassert_false(system_is_in_safe_mode());
zassert_false(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_STARTED);
zassert_true(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_FAIL_PRECONDITIONS);
zassert_equal(1, system_reset_fake.call_count);
}
ZTEST_USER(system_safe_mode, test_enter_safe_mode_from_kernel_panic)
{
system_set_shrspi_image_copy(EC_IMAGE_RO);
k_sys_fatal_error_handler(K_ERR_KERNEL_PANIC, NULL);
zassert_false(system_is_in_safe_mode());
zassert_false(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_STARTED);
zassert_true(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_FAIL_PRECONDITIONS);
zassert_equal(1, system_reset_fake.call_count);
}
ZTEST_USER(system_safe_mode, test_enter_safe_mode_twice)
{
zassert_false(system_is_in_safe_mode());
k_sys_fatal_error_handler(K_ERR_CPU_EXCEPTION, NULL);
zassert_true(system_is_in_safe_mode());
zassert_true(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_STARTED);
zassert_false(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_FAIL_PRECONDITIONS);
zassert_equal(0, system_reset_fake.call_count);
k_sys_fatal_error_handler(K_ERR_CPU_EXCEPTION, NULL);
zassert_true(system_is_in_safe_mode());
zassert_true(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_STARTED);
zassert_true(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_FAIL_PRECONDITIONS);
zassert_equal(1, system_reset_fake.call_count);
}
ZTEST_USER(system_safe_mode, test_enter_safe_mode)
{
zassert_false(system_is_in_safe_mode());
k_sys_fatal_error_handler(K_ERR_CPU_EXCEPTION, NULL);
zassert_equal(0, system_reset_fake.call_count);
zassert_true(system_is_in_safe_mode());
zassert_true(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_STARTED);
zassert_false(get_panic_data_write()->flags &
PANIC_DATA_FLAG_SAFE_MODE_FAIL_PRECONDITIONS);
}
ZTEST_USER(system_safe_mode, test_safe_mode_reboot)
{
zassert_false(system_is_in_safe_mode());
k_sys_fatal_error_handler(0, NULL);
zassert_true(system_is_in_safe_mode());
zassert_equal(0, system_reset_fake.call_count);
/* Wait half of timeout and system hasn't rebooted yet */
k_msleep(CONFIG_PLATFORM_EC_SYSTEM_SAFE_MODE_TIMEOUT_MSEC / 2);
zassert_equal(0, system_reset_fake.call_count);
k_msleep(CONFIG_PLATFORM_EC_SYSTEM_SAFE_MODE_TIMEOUT_MSEC / 2);
zassert_equal(1, system_reset_fake.call_count);
}
ZTEST_USER(system_safe_mode, test_blocked_command_in_safe_mode)
{
struct ec_params_gpio_get cmd_params = {
.name = "wp_l",
};
struct ec_response_gpio_get cmd_response;
struct host_cmd_handler_args args = BUILD_HOST_COMMAND(
EC_CMD_GPIO_GET, 0, cmd_response, cmd_params);
zassert_false(system_is_in_safe_mode());
zassert_ok(host_command_process(&args));
k_sys_fatal_error_handler(K_ERR_CPU_EXCEPTION, NULL);
zassert_true(system_is_in_safe_mode());
zassert_true(host_command_process(&args));
}
ZTEST_SUITE(system_safe_mode, NULL, NULL, system_before, NULL, NULL);
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