[PATCHv6,2/3] arm-virt: add secure pl061 for reset/power down

Commit Message

Maxim Uvarov Jan. 14, 2021, 2:50 p.m. UTC

Add secure pl061 for reset/power down machine from
the secure world (Arm Trusted Firmware). Connect it
with gpio-pwr driver.

Signed-off-by: Maxim Uvarov <[e-mail]>
---
 hw/arm/Kconfig        |  1 +
 hw/arm/virt.c         | 34 ++++++++++++++++++++++++++++++++++
 include/hw/arm/virt.h |  2 ++
 3 files changed, 37 insertions(+)

Patch

diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index 0a242e4c5d..13cc42dcc8 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -17,6 +17,7 @@  config ARM_VIRT
     select PL011 # UART
     select PL031 # RTC
     select PL061 # GPIO
+    select GPIO_PWR
     select PLATFORM_BUS
     select SMBIOS
     select VIRTIO_MMIO
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 96985917d3..6f3ec15985 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -153,6 +153,7 @@  static const MemMapEntry base_memmap[] = {
     [VIRT_ACPI_GED] =           { 0x09080000, ACPI_GED_EVT_SEL_LEN },
     [VIRT_NVDIMM_ACPI] =        { 0x09090000, NVDIMM_ACPI_IO_LEN},
     [VIRT_PVTIME] =             { 0x090a0000, 0x00010000 },
+    [VIRT_SECURE_GPIO] =        { 0x090b0000, 0x00001000 },
     [VIRT_MMIO] =               { 0x0a000000, 0x00000200 },
     /* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
     [VIRT_PLATFORM_BUS] =       { 0x0c000000, 0x02000000 },
@@ -864,6 +865,32 @@  static void create_gpio(const VirtMachineState *vms)
     g_free(nodename);
 }
 
+#define ATF_GPIO_POWEROFF 3
+#define ATF_GPIO_REBOOT   4
+
+static void create_gpio_secure(const VirtMachineState *vms, MemoryRegion *mem)
+{
+    DeviceState *gpio_pwr_dev;
+    SysBusDevice *s;
+    hwaddr base = vms->memmap[VIRT_SECURE_GPIO].base;
+    DeviceState *pl061_dev;
+
+    /* Secure pl061 */
+    pl061_dev = qdev_new("pl061");
+    s = SYS_BUS_DEVICE(pl061_dev);
+    sysbus_realize_and_unref(s, &error_fatal);
+    memory_region_add_subregion(mem, base, sysbus_mmio_get_region(s, 0));
+
+    /* gpio-pwr */
+    gpio_pwr_dev = sysbus_create_simple("gpio-pwr", -1, NULL);
+
+    /* connect secure pl061 to gpio-pwr */
+    qdev_connect_gpio_out(pl061_dev, ATF_GPIO_POWEROFF,
+                          qdev_get_gpio_in_named(gpio_pwr_dev, "reset", 0));
+    qdev_connect_gpio_out(pl061_dev, ATF_GPIO_REBOOT,
+                          qdev_get_gpio_in_named(gpio_pwr_dev, "shutdown", 0));
+}
+
 static void create_virtio_devices(const VirtMachineState *vms)
 {
     int i;
@@ -1993,6 +2020,10 @@  static void machvirt_init(MachineState *machine)
         create_gpio(vms);
     }
 
+    if (vms->secure && !vmc->no_secure_gpio) {
+        create_gpio_secure(vms, secure_sysmem);
+    }
+
      /* connect powerdown request */
      vms->powerdown_notifier.notify = virt_powerdown_req;
      qemu_register_powerdown_notifier(&vms->powerdown_notifier);
@@ -2608,8 +2639,11 @@  DEFINE_VIRT_MACHINE_AS_LATEST(6, 0)
 
 static void virt_machine_5_2_options(MachineClass *mc)
 {
+    VirtMachineClass *vmc = VIRT_MACHINE_CLASS(OBJECT_CLASS(mc));
+
     virt_machine_6_0_options(mc);
     compat_props_add(mc->compat_props, hw_compat_5_2, hw_compat_5_2_len);
+    vmc->no_secure_gpio = true;
 }
 DEFINE_VIRT_MACHINE(5, 2)
 
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index abf54fab49..6f6c85ffcf 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -81,6 +81,7 @@  enum {
     VIRT_GPIO,
     VIRT_SECURE_UART,
     VIRT_SECURE_MEM,
+    VIRT_SECURE_GPIO,
     VIRT_PCDIMM_ACPI,
     VIRT_ACPI_GED,
     VIRT_NVDIMM_ACPI,
@@ -127,6 +128,7 @@  struct VirtMachineClass {
     bool kvm_no_adjvtime;
     bool no_kvm_steal_time;
     bool acpi_expose_flash;
+    bool no_secure_gpio;
 };
 
 struct VirtMachineState {