Re: [Qemu-devel] [PATCH v5 8/8] hw/arm: Use GED for system_powerdown event

[Auger Eric <eric.auger@redhat.com>]

Hi Shameer,
On 5/22/19 6:22 PM, Shameer Kolothum wrote:
> Use GED for system_powerdown event instead of GPIO for ACPI.
> Guest boot with DT still uses GPIO.>
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>

Thanks

Eric

> ---
>  hw/arm/virt-acpi-build.c | 37 +------------------------------------
>  hw/arm/virt.c            |  7 +++----
>  2 files changed, 4 insertions(+), 40 deletions(-)
> 
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index ed8e0cee3a..f23b276d77 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -49,7 +49,6 @@
>  #include "kvm_arm.h"
>  
>  #define ARM_SPI_BASE 32
> -#define ACPI_POWER_BUTTON_DEVICE "PWRB">
>  static void acpi_dsdt_add_cpus(Aml *scope, int smp_cpus)
>  {
> @@ -328,37 +327,6 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap,
>      aml_append(scope, dev);
>  }
>  
> -static void acpi_dsdt_add_gpio(Aml *scope, const MemMapEntry *gpio_memmap,
> -                                           uint32_t gpio_irq)
> -{
> -    Aml *dev = aml_device("GPO0");
> -    aml_append(dev, aml_name_decl("_HID", aml_string("ARMH0061")));
> -    aml_append(dev, aml_name_decl("_ADR", aml_int(0)));
> -    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
> -
> -    Aml *crs = aml_resource_template();
> -    aml_append(crs, aml_memory32_fixed(gpio_memmap->base, gpio_memmap->size,
> -                                       AML_READ_WRITE));
> -    aml_append(crs, aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
> -                                  AML_EXCLUSIVE, &gpio_irq, 1));
> -    aml_append(dev, aml_name_decl("_CRS", crs));
> -
> -    Aml *aei = aml_resource_template();
> -    /* Pin 3 for power button */
> -    const uint32_t pin_list[1] = {3};
> -    aml_append(aei, aml_gpio_int(AML_CONSUMER, AML_EDGE, AML_ACTIVE_HIGH,
> -                                 AML_EXCLUSIVE, AML_PULL_UP, 0, pin_list, 1,
> -                                 "GPO0", NULL, 0));
> -    aml_append(dev, aml_name_decl("_AEI", aei));
> -
> -    /* _E03 is handle for power button */
> -    Aml *method = aml_method("_E03", 0, AML_NOTSERIALIZED);
> -    aml_append(method, aml_notify(aml_name(ACPI_POWER_BUTTON_DEVICE),
> -                                  aml_int(0x80)));
> -    aml_append(dev, method);
> -    aml_append(scope, dev);
> -}
> -
>  static void acpi_dsdt_add_power_button(Aml *scope)
>  {
>      Aml *dev = aml_device(ACPI_POWER_BUTTON_DEVICE);
> @@ -761,9 +729,8 @@ 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) {
> +        acpi_dsdt_add_power_button(scope);
>          build_ged_aml(scope, "\\_SB."GED_DEVICE,
>                        HOTPLUG_HANDLER(vms->acpi_dev),
>                        irqmap[VIRT_ACPI_GED] + ARM_SPI_BASE, AML_SYSTEM_MEMORY);
> @@ -774,8 +741,6 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
>                                   AML_SYSTEM_MEMORY);
>      }
>  
> -    acpi_dsdt_add_power_button(scope);
> -
>      aml_append(dsdt, scope);
>  
>      /* copy AML table into ACPI tables blob and patch header there */
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index 8dfd7537b9..bb83160888 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -525,7 +525,7 @@ 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 = DEVICE(object_new(TYPE_ACPI_GED));
>      qdev_prop_set_uint64(dev, "memhp-base",
> @@ -1710,12 +1710,11 @@ static void machvirt_init(MachineState *machine)
>  
>      create_pcie(vms, pic);
>  
> -    create_gpio(vms, pic);
> -
>      if (aarch64 && firmware_loaded && acpi_enabled) {
>          vms->acpi_dev = create_acpi_ged(vms, pic);
> +    } else {
> +        create_gpio(vms, pic);
>      }
> -
>      /* Create mmio transports, so the user can create virtio backends
>       * (which will be automatically plugged in to the transports). If
>       * no backend is created the transport will just sit harmlessly idle.
>