[PATCH v2 2/7] arm/virt: Wire up GPIO error source for ACPI / GHES

[Mauro Carvalho Chehab]

From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Creates a GED - Generic Event Device and set a GPIO to
be used or error injection.

[mchehab: use a define for the generic event pin number and do some cleanups]
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 hw/arm/virt-acpi-build.c | 30 ++++++++++++++++++++++++++----
 hw/arm/virt.c            | 14 ++++++++++++--
 include/hw/arm/virt.h    |  1 +
 include/hw/boards.h      |  1 +
 4 files changed, 40 insertions(+), 6 deletions(-)

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index ad0a0bcec310..98b980e2443e 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -63,6 +63,7 @@
 
 #define ARM_SPI_BASE 32
 
+#define ACPI_GENERIC_EVENT_DEVICE "GEDD"
 #define ACPI_BUILD_TABLE_SIZE             0x20000
 
 static void acpi_dsdt_add_cpus(Aml *scope, VirtMachineState *vms)
@@ -142,6 +143,8 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry 
*memmap,
 static void acpi_dsdt_add_gpio(Aml *scope, const MemMapEntry *gpio_memmap,
                                            uint32_t gpio_irq)
 {
+    uint32_t pin;
+
     Aml *dev = aml_device("GPO0");
     aml_append(dev, aml_name_decl("_HID", aml_string("ARMH0061")));
     aml_append(dev, aml_name_decl("_UID", aml_int(0)));
@@ -155,7 +158,12 @@ static void acpi_dsdt_add_gpio(Aml *scope, const 
MemMapEntry *gpio_memmap,
 
     Aml *aei = aml_resource_template();
     /* Pin for power button */
-    const uint32_t pin = GPIO_PIN_POWER_BUTTON;
+    pin = GPIO_PIN_POWER_BUTTON;
+    aml_append(aei, aml_gpio_int(AML_CONSUMER, AML_EDGE, AML_ACTIVE_HIGH,
+                                 AML_EXCLUSIVE, AML_PULL_UP, 0, &pin, 1,
+                                 "GPO0", NULL, 0));
+    /* Pin for generic error */
+    pin = GPIO_PIN_GENERIC_ERROR;
     aml_append(aei, aml_gpio_int(AML_CONSUMER, AML_EDGE, AML_ACTIVE_HIGH,
                                  AML_EXCLUSIVE, AML_PULL_UP, 0, &pin, 1,
                                  "GPO0", NULL, 0));
@@ -166,6 +174,11 @@ static void acpi_dsdt_add_gpio(Aml *scope, const 
MemMapEntry *gpio_memmap,
     aml_append(method, aml_notify(aml_name(ACPI_POWER_BUTTON_DEVICE),
                                   aml_int(0x80)));
     aml_append(dev, method);
+    method = aml_method("_E06", 0, AML_NOTSERIALIZED);
+    aml_append(method, aml_notify(aml_name(ACPI_GENERIC_EVENT_DEVICE),
+                                  aml_int(0x80)));
+    aml_append(dev, method);
+
     aml_append(scope, dev);
 }
 
@@ -800,6 +813,15 @@ static void build_fadt_rev6(GArray *table_data, BIOSLinker 
*linker,
     build_fadt(table_data, linker, &fadt, vms->oem_id, vms->oem_table_id);
 }
 
+static void acpi_dsdt_add_generic_event_device(Aml *scope)
+{
+    Aml *dev = aml_device(ACPI_GENERIC_EVENT_DEVICE);
+    aml_append(dev, aml_name_decl("_HID", aml_string("PNP0C33")));
+    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
+    aml_append(dev, aml_name_decl("_STA", aml_int(0xF)));
+    aml_append(scope, dev);
+}
+
 /* DSDT */
 static void
 build_dsdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
@@ -841,10 +863,9 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, 
VirtMachineState *vms)
                       HOTPLUG_HANDLER(vms->acpi_dev),
                       irqmap[VIRT_ACPI_GED] + ARM_SPI_BASE, AML_SYSTEM_MEMORY,
                       memmap[VIRT_ACPI_GED].base);
-    } else {
-        acpi_dsdt_add_gpio(scope, &memmap[VIRT_GPIO],
-                           (irqmap[VIRT_GPIO] + ARM_SPI_BASE));
     }
+    acpi_dsdt_add_gpio(scope, &memmap[VIRT_GPIO],
+                       (irqmap[VIRT_GPIO] + ARM_SPI_BASE));
 
     if (vms->acpi_dev) {
         uint32_t event = object_property_get_uint(OBJECT(vms->acpi_dev),
@@ -858,6 +879,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, 
VirtMachineState *vms)
     }
 
     acpi_dsdt_add_power_button(scope);
+    acpi_dsdt_add_generic_event_device(scope);
 #ifdef CONFIG_TPM
     acpi_dsdt_add_tpm(scope, vms);
 #endif
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 7b886f3477b6..e470c6c33352 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -997,6 +997,13 @@ static void create_rtc(const VirtMachineState *vms)
 }
 
 static DeviceState *gpio_key_dev;
+
+static DeviceState *gpio_error_dev;
+static void virt_set_error(void)
+{
+    qemu_set_irq(qdev_get_gpio_in(gpio_error_dev, 0), 1);
+}
+
 static void virt_powerdown_req(Notifier *n, void *opaque)
 {
     VirtMachineState *s = container_of(n, VirtMachineState, 
powerdown_notifier);
@@ -1015,6 +1022,9 @@ static void create_gpio_keys(char *fdt, DeviceState 
*pl061_dev,
     gpio_key_dev = sysbus_create_simple("gpio-key", -1,
                                         qdev_get_gpio_in(pl061_dev,
                                                          
GPIO_PIN_POWER_BUTTON));
+    gpio_error_dev = sysbus_create_simple("gpio-key", -1,
+                                          qdev_get_gpio_in(pl061_dev,
+                                                           
GPIO_PIN_GENERIC_ERROR));
 
     qemu_fdt_add_subnode(fdt, "/gpio-keys");
     qemu_fdt_setprop_string(fdt, "/gpio-keys", "compatible", "gpio-keys");
@@ -2385,9 +2395,8 @@ static void machvirt_init(MachineState *machine)
 
     if (has_ged && aarch64 && firmware_loaded && virt_is_acpi_enabled(vms)) {
         vms->acpi_dev = create_acpi_ged(vms);
-    } else {
-        create_gpio_devices(vms, VIRT_GPIO, sysmem);
     }
+    create_gpio_devices(vms, VIRT_GPIO, sysmem);
 
     if (vms->secure && !vmc->no_secure_gpio) {
         create_gpio_devices(vms, VIRT_SECURE_GPIO, secure_sysmem);
@@ -3101,6 +3110,7 @@ static void virt_machine_class_init(ObjectClass *oc, void 
*data)
     mc->default_ram_id = "mach-virt.ram";
     mc->default_nic = "virtio-net-pci";
 
+    mc->set_error = virt_set_error;
     object_class_property_add(oc, "acpi", "OnOffAuto",
         virt_get_acpi, virt_set_acpi,
         NULL, NULL);
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index a4d937ed45ac..c9769d7d4d7f 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -49,6 +49,7 @@
 
 /* GPIO pins */
 #define GPIO_PIN_POWER_BUTTON  3
+#define GPIO_PIN_GENERIC_ERROR 6
 
 enum {
     VIRT_FLASH,
diff --git a/include/hw/boards.h b/include/hw/boards.h
index ef6f18f2c1a7..6cf01f3934ae 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -304,6 +304,7 @@ struct MachineClass {
     const CPUArchIdList *(*possible_cpu_arch_ids)(MachineState *machine);
     int64_t (*get_default_cpu_node_id)(const MachineState *ms, int idx);
     ram_addr_t (*fixup_ram_size)(ram_addr_t size);
+    void (*set_error)(void);
 };
 
 /**
-- 
2.45.2