On Wed, 4 Sep 2019 09:56:26 +0100
Shameer Kolothum <shameerali.kolothum.th...@huawei.com> wrote:

> For machines 4.2 or higher with ACPI boot use GED for system_powerdown
> event instead of GPIO. Guest boot with DT still uses GPIO.
> 
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.th...@huawei.com>
> Reviewed-by: Eric Auger <eric.au...@redhat.com>

Reviewed-by: Igor Mammedov <imamm...@redhat.com>

> ---
> v9 --> v10
>  -Eric's R-by
> 
> v8 --> v9
>  -Re-arranged patches 8 & 9 from v8 based on Igor's comments.
> 
> v7 --> v8
>  -Retained gpio based system_powerdown support for machines < 4.2.
>  -Reuse of virt_powerdown_req() for ACPI GED use.
>  -Dropped Eric's R-by for now because of above.
> ---
>  hw/acpi/generic_event_device.c         |  8 ++++++++
>  hw/arm/virt-acpi-build.c               |  6 +++---
>  hw/arm/virt.c                          | 16 +++++++++++-----
>  include/hw/acpi/acpi_dev_interface.h   |  1 +
>  include/hw/acpi/generic_event_device.h |  3 +++
>  5 files changed, 26 insertions(+), 8 deletions(-)
> 
> diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
> index f81d966058..47e178c583 100644
> --- a/hw/acpi/generic_event_device.c
> +++ b/hw/acpi/generic_event_device.c
> @@ -22,6 +22,7 @@
>  
>  static const uint32_t ged_supported_events[] = {
>      ACPI_GED_MEM_HOTPLUG_EVT,
> +    ACPI_GED_PWR_DOWN_EVT,
>  };
>  
>  /*
> @@ -104,6 +105,11 @@ void build_ged_aml(Aml *table, const char *name, 
> HotplugHandler *hotplug_dev,
>                  aml_append(if_ctx, aml_call0(MEMORY_DEVICES_CONTAINER "."
>                                               MEMORY_SLOT_SCAN_METHOD));
>                  break;
> +            case ACPI_GED_PWR_DOWN_EVT:
> +                aml_append(if_ctx,
> +                           aml_notify(aml_name(ACPI_POWER_BUTTON_DEVICE),
> +                                      aml_int(0x80)));
> +                break;
>              default:
>                  /*
>                   * Please make sure all the events in ged_supported_events[]
> @@ -190,6 +196,8 @@ static void acpi_ged_send_event(AcpiDeviceIf *adev, 
> AcpiEventStatusBits ev)
>  
>      if (ev & ACPI_MEMORY_HOTPLUG_STATUS) {
>          sel = ACPI_GED_MEM_HOTPLUG_EVT;
> +    } else if (ev & ACPI_POWER_DOWN_STATUS) {
> +        sel = ACPI_GED_PWR_DOWN_EVT;
>      } else {
>          /* Unknown event. Return without generating interrupt. */
>          warn_report("GED: Unsupported event %d. No irq injected", ev);
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index a4872a0b00..bbf7f6fafa 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -50,7 +50,6 @@
>  #include "migration/vmstate.h"
>  
>  #define ARM_SPI_BASE 32
> -#define ACPI_POWER_BUTTON_DEVICE "PWRB"
>  
>  static void acpi_dsdt_add_cpus(Aml *scope, int smp_cpus)
>  {
> @@ -740,13 +739,14 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, 
> VirtMachineState *vms)
>                      (irqmap[VIRT_MMIO] + ARM_SPI_BASE), 
> NUM_VIRTIO_TRANSPORTS);
>      acpi_dsdt_add_pci(scope, memmap, (irqmap[VIRT_PCIE] + ARM_SPI_BASE),
>                        vms->highmem, vms->highmem_ecam);
> -    acpi_dsdt_add_gpio(scope, &memmap[VIRT_GPIO],
> -                       (irqmap[VIRT_GPIO] + ARM_SPI_BASE));
>      if (vms->acpi_dev) {
>          build_ged_aml(scope, "\\_SB."GED_DEVICE,
>                        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));
>      }
>  
>      if (vms->acpi_dev && ms->ram_slots) {
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index 89ee37d7de..32208e1058 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -532,7 +532,7 @@ static inline DeviceState 
> *create_acpi_ged(VirtMachineState *vms, qemu_irq *pic)
>  {
>      DeviceState *dev;
>      int irq = vms->irqmap[VIRT_ACPI_GED];
> -    uint32_t event = ACPI_GED_MEM_HOTPLUG_EVT;
> +    uint32_t event = ACPI_GED_MEM_HOTPLUG_EVT | ACPI_GED_PWR_DOWN_EVT;
>  
>      dev = qdev_create(NULL, TYPE_ACPI_GED);
>      qdev_prop_set_uint32(dev, "ged-event", event);
> @@ -787,8 +787,14 @@ static void create_rtc(const VirtMachineState *vms, 
> qemu_irq *pic)
>  static DeviceState *gpio_key_dev;
>  static void virt_powerdown_req(Notifier *n, void *opaque)
>  {
> -    /* use gpio Pin 3 for power button event */
> -    qemu_set_irq(qdev_get_gpio_in(gpio_key_dev, 0), 1);
> +    VirtMachineState *s = container_of(n, VirtMachineState, 
> powerdown_notifier);
> +
> +    if (s->acpi_dev) {
> +        acpi_send_event(s->acpi_dev, ACPI_POWER_DOWN_STATUS);
> +    } else {
> +        /* use gpio Pin 3 for power button event */
> +        qemu_set_irq(qdev_get_gpio_in(gpio_key_dev, 0), 1);
> +    }
>  }
>  
>  static void create_gpio(const VirtMachineState *vms, qemu_irq *pic)
> @@ -1716,10 +1722,10 @@ static void machvirt_init(MachineState *machine)
>  
>      create_pcie(vms, pic);
>  
> -    create_gpio(vms, pic);
> -
>      if (has_ged && aarch64 && firmware_loaded && acpi_enabled) {
>          vms->acpi_dev = create_acpi_ged(vms, pic);
> +    } else {
> +        create_gpio(vms, pic);
>      }
>  
>       /* connect powerdown request */
> diff --git a/include/hw/acpi/acpi_dev_interface.h 
> b/include/hw/acpi/acpi_dev_interface.h
> index 0ba90effd2..a2a12af9b9 100644
> --- a/include/hw/acpi/acpi_dev_interface.h
> +++ b/include/hw/acpi/acpi_dev_interface.h
> @@ -13,6 +13,7 @@ typedef enum {
>      ACPI_MEMORY_HOTPLUG_STATUS = 8,
>      ACPI_NVDIMM_HOTPLUG_STATUS = 16,
>      ACPI_VMGENID_CHANGE_STATUS = 32,
> +    ACPI_POWER_DOWN_STATUS = 64,
>  } AcpiEventStatusBits;
>  
>  #define TYPE_ACPI_DEVICE_IF "acpi-device-interface"
> diff --git a/include/hw/acpi/generic_event_device.h 
> b/include/hw/acpi/generic_event_device.h
> index 2049e8d873..d157eac088 100644
> --- a/include/hw/acpi/generic_event_device.h
> +++ b/include/hw/acpi/generic_event_device.h
> @@ -62,6 +62,8 @@
>  #include "hw/sysbus.h"
>  #include "hw/acpi/memory_hotplug.h"
>  
> +#define ACPI_POWER_BUTTON_DEVICE "PWRB"
> +
>  #define TYPE_ACPI_GED "acpi-ged"
>  #define ACPI_GED(obj) \
>      OBJECT_CHECK(AcpiGedState, (obj), TYPE_ACPI_GED)
> @@ -79,6 +81,7 @@
>   * through GED.
>   */
>  #define ACPI_GED_MEM_HOTPLUG_EVT   0x1
> +#define ACPI_GED_PWR_DOWN_EVT      0x2
>  
>  typedef struct GEDState {
>      MemoryRegion io;


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