cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

gpio_pwr.c (1738B)

      1/*
      2 * GPIO qemu power controller
      3 *
      4 * Copyright (c) 2020 Linaro Limited
      5 *
      6 * Author: Maxim Uvarov <maxim.uvarov@linaro.org>
      7 *
      8 * Virtual gpio driver which can be used on top of pl061
      9 * to reboot and shutdown qemu virtual machine. One of use
     10 * case is gpio driver for secure world application (ARM
     11 * Trusted Firmware.).
     12 *
     13 * This work is licensed under the terms of the GNU GPL, version 2 or later.
     14 * See the COPYING file in the top-level directory.
     15 * SPDX-License-Identifier: GPL-2.0-or-later
     16 */
     17
     18/*
     19 * QEMU interface:
     20 * two named input GPIO lines:
     21 *   'reset' : when asserted, trigger system reset
     22 *   'shutdown' : when asserted, trigger system shutdown
     23 */
     24
     25#include "qemu/osdep.h"
     26#include "hw/sysbus.h"
     27#include "sysemu/runstate.h"
     28
     29#define TYPE_GPIOPWR "gpio-pwr"
     30OBJECT_DECLARE_SIMPLE_TYPE(GPIO_PWR_State, GPIOPWR)
     31
     32struct GPIO_PWR_State {
     33    SysBusDevice parent_obj;
     34};
     35
     36static void gpio_pwr_reset(void *opaque, int n, int level)
     37{
     38    if (level) {
     39        qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
     40    }
     41}
     42
     43static void gpio_pwr_shutdown(void *opaque, int n, int level)
     44{
     45    if (level) {
     46        qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
     47    }
     48}
     49
     50static void gpio_pwr_init(Object *obj)
     51{
     52    DeviceState *dev = DEVICE(obj);
     53
     54    qdev_init_gpio_in_named(dev, gpio_pwr_reset, "reset", 1);
     55    qdev_init_gpio_in_named(dev, gpio_pwr_shutdown, "shutdown", 1);
     56}
     57
     58static const TypeInfo gpio_pwr_info = {
     59    .name          = TYPE_GPIOPWR,
     60    .parent        = TYPE_SYS_BUS_DEVICE,
     61    .instance_size = sizeof(GPIO_PWR_State),
     62    .instance_init = gpio_pwr_init,
     63};
     64
     65static void gpio_pwr_register_types(void)
     66{
     67    type_register_static(&gpio_pwr_info);
     68}
     69
     70type_init(gpio_pwr_register_types)