On Tue, Jan 12, 2021 at 6:36 AM Maxim Uvarov maxim.uvarov@linaro.org wrote:
Implement gpio-pwr driver to allow reboot and poweroff machine. This is simple driver with just 2 gpios lines. Current use case is to reboot and poweroff virt machine in secure mode. Secure pl066 gpio chip is needed for that.
Signed-off-by: Maxim Uvarov maxim.uvarov@linaro.org
Reviewed-by: Hao Wu wuhaotsh@google.com
hw/gpio/Kconfig | 3 ++ hw/gpio/gpio_pwr.c | 70 +++++++++++++++++++++++++++++++++++++++++++++ hw/gpio/meson.build | 1 + 3 files changed, 74 insertions(+) create mode 100644 hw/gpio/gpio_pwr.c
diff --git a/hw/gpio/Kconfig b/hw/gpio/Kconfig index b6fdaa2586..f0e7405f6e 100644 --- a/hw/gpio/Kconfig +++ b/hw/gpio/Kconfig @@ -8,5 +8,8 @@ config PL061 config GPIO_KEY bool
+config GPIO_PWR
- bool
config SIFIVE_GPIO bool diff --git a/hw/gpio/gpio_pwr.c b/hw/gpio/gpio_pwr.c new file mode 100644 index 0000000000..8ed8d5d24f --- /dev/null +++ b/hw/gpio/gpio_pwr.c @@ -0,0 +1,70 @@ +/*
- GPIO qemu power controller
- Copyright (c) 2020 Linaro Limited
- Author: Maxim Uvarov maxim.uvarov@linaro.org
- Virtual gpio driver which can be used on top of pl061
- to reboot and shutdown qemu virtual machine. One of use
- case is gpio driver for secure world application (ARM
- Trusted Firmware.).
- This work is licensed under the terms of the GNU GPL, version 2 or
later.
- See the COPYING file in the top-level directory.
- SPDX-License-Identifier: GPL-2.0-or-later
- */
+/*
- QEMU interface:
- two named input GPIO lines:
- 'reset' : when asserted, trigger system reset
- 'shutdown' : when asserted, trigger system shutdown
- */
+#include "qemu/osdep.h" +#include "hw/sysbus.h" +#include "sysemu/runstate.h"
+#define TYPE_GPIOPWR "gpio-pwr" +OBJECT_DECLARE_SIMPLE_TYPE(GPIO_PWR_State, GPIOPWR)
+struct GPIO_PWR_State {
- SysBusDevice parent_obj;
+};
+static void gpio_pwr_reset(void *opaque, int n, int level) +{
- if (!level) {
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);- }
+}
+static void gpio_pwr_shutdown(void *opaque, int n, int level) +{
- if (!level) {
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);- }
+}
+static void gpio_pwr_init(Object *obj) +{
- DeviceState *dev = DEVICE(obj);
- qdev_init_gpio_in_named(dev, gpio_pwr_reset, "reset", 1);
- qdev_init_gpio_in_named(dev, gpio_pwr_shutdown, "shutdown", 1);
+}
+static const TypeInfo gpio_pwr_info = {
- .name = TYPE_GPIOPWR,
- .parent = TYPE_SYS_BUS_DEVICE,
- .instance_size = sizeof(GPIO_PWR_State),
- .instance_init = gpio_pwr_init,
+};
+static void gpio_pwr_register_types(void) +{
- type_register_static(&gpio_pwr_info);
+}
+type_init(gpio_pwr_register_types) diff --git a/hw/gpio/meson.build b/hw/gpio/meson.build index 5c0a7d7b95..79568f00ce 100644 --- a/hw/gpio/meson.build +++ b/hw/gpio/meson.build @@ -1,5 +1,6 @@ softmmu_ss.add(when: 'CONFIG_E500', if_true: files('mpc8xxx.c')) softmmu_ss.add(when: 'CONFIG_GPIO_KEY', if_true: files('gpio_key.c')) +softmmu_ss.add(when: 'CONFIG_GPIO_PWR', if_true: files('gpio_pwr.c')) softmmu_ss.add(when: 'CONFIG_MAX7310', if_true: files('max7310.c')) softmmu_ss.add(when: 'CONFIG_PL061', if_true: files('pl061.c')) softmmu_ss.add(when: 'CONFIG_PUV3', if_true: files('puv3_gpio.c')) -- 2.17.1