Re: [Qemu-devel] [RFC PATCH 3/4] hw/arm/virt: Enable pc-dimm hotplug support

[Igor Mammedov <imammedo@redhat.com>]

On Mon, 28 Jan 2019 11:05:45 +0000
Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> wrote:

> pc-dimm memory hotplug is enabled using GPIO(Pin 2) based ACPI
> event. Hot removal functionality is not yet supported.
> 
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
> ---
>  hw/arm/virt.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 55 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index 884960d..cf64554 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -62,6 +62,7 @@
>  #include "hw/mem/pc-dimm.h"
>  #include "hw/mem/nvdimm.h"
>  #include "hw/acpi/acpi.h"
> +#include "hw/acpi/pc-hotplug.h"
it looks like x86 specific file, what is this here for?

>  
>  #define DEFINE_VIRT_MACHINE_LATEST(major, minor, latest) \
>      static void virt_##major##_##minor##_class_init(ObjectClass *oc, \
> @@ -1651,7 +1652,14 @@ static void machvirt_init(MachineState *machine)
>          nvdimm_init_acpi_state(acpi_nvdimm_state, sysmem,
>                                 vms->fw_cfg, OBJECT(vms));
>      }
> +    if (vms->acpi_memhp_state.is_enabled) {
> +        MemHotplugState *state =  &vms->acpi_memhp_state;
> +        hwaddr base;
>  
> +        state->hw_reduced_acpi = true;
> +        base = vms->memmap[VIRT_ACPI_IO].base + ACPI_MEMORY_HOTPLUG_BASE;
> +        acpi_memory_hotplug_init(sysmem, OBJECT(vms), state, base);
> +    }
>      vms->bootinfo.ram_size = machine->ram_size;
>      vms->bootinfo.kernel_filename = machine->kernel_filename;
>      vms->bootinfo.kernel_cmdline = machine->kernel_cmdline;
[...]