[RFC,1/3,qemu] arm/virt: Wire up GPIO error source for ACPI / GHES

Commit Message

Shiju Jose June 28, 2024, 9:06 a.m. UTC

From: Jonathan Cameron <[e-mail]>

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

Signed-off-by: Jonathan Cameron <[e-mail]>
Signed-off-by: Shiju Jose <[e-mail]>
---
 hw/arm/virt-acpi-build.c | 29 +++++++++++++++++++++++++----
 hw/arm/virt.c            | 12 +++++++++++-
 include/hw/boards.h      |  1 +
 3 files changed, 37 insertions(+), 5 deletions(-)

Patch

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index b2366f24f9..998bf01743 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)
@@ -155,9 +156,14 @@  static void acpi_dsdt_add_gpio(Aml *scope, const MemMapEntry *gpio_memmap,
 
     Aml *aei = aml_resource_template();
     /* Pin 3 for power button */
-    const uint32_t pin_list[1] = {3};
+    uint32_t pin = 3;
     aml_append(aei, aml_gpio_int(AML_CONSUMER, AML_EDGE, AML_ACTIVE_HIGH,
-                                 AML_EXCLUSIVE, AML_PULL_UP, 0, pin_list, 1,
+                                 AML_EXCLUSIVE, AML_PULL_UP, 0, &pin, 1,
+                                 "GPO0", NULL, 0));
+    pin = 6;
+    /* Pin 8 for 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));
     aml_append(dev, aml_name_decl("_AEI", aei));
 
@@ -166,6 +172,11 @@  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);
 }
 
@@ -794,6 +805,15 @@  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)
@@ -836,9 +856,9 @@  build_dsdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
                       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),
@@ -852,6 +872,7 @@  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 0784ee7f46..6d96bb2482 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -993,6 +993,13 @@  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);
@@ -1010,6 +1017,8 @@  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, 3));
+    gpio_error_dev = sysbus_create_simple("gpio-key", -1,
+                                          qdev_get_gpio_in(pl061_dev, 6));
 
     qemu_fdt_add_subnode(fdt, "/gpio-keys");
     qemu_fdt_setprop_string(fdt, "/gpio-keys", "compatible", "gpio-keys");
@@ -2381,8 +2390,8 @@  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);
@@ -3096,6 +3105,7 @@  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/boards.h b/include/hw/boards.h
index 73ad319d7d..fe23750456 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);
 };
 
 /**