[v4,1/6] pc, pc-dimm: Extract hotplug related fields in PCMachineState to a structure

Move hotplug_memory_base and hotplug_memory fields of PCMachineState
into a separate structure so that the same can be made use of from
other architectures supporing memory hotplug.

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/i386/acpi-build.c     |  2 +-
 hw/i386/pc.c             | 26 +++++++++++++-------------
 include/hw/i386/pc.h     |  7 ++-----
 include/hw/mem/pc-dimm.h | 11 +++++++++++
 4 files changed, 27 insertions(+), 19 deletions(-)

On Mon, 29 Jun 2015 13:50:22 +0530
Bharata B Rao <bharata@linux.vnet.ibm.com> wrote:

> Move hotplug_memory_base and hotplug_memory fields of PCMachineState
> into a separate structure so that the same can be made use of from
> other architectures supporing memory hotplug.
> 
> Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> ---
>  hw/i386/acpi-build.c     |  2 +-
>  hw/i386/pc.c             | 26 +++++++++++++-------------
>  include/hw/i386/pc.h     |  7 ++-----
>  include/hw/mem/pc-dimm.h | 11 +++++++++++
>  4 files changed, 27 insertions(+), 19 deletions(-)
> 
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index 00818b9..aed811a 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -1509,7 +1509,7 @@ build_srat(GArray *table_data, GArray *linker, PcGuestInfo *guest_info)
>       */
>      if (hotplugabble_address_space_size) {
>          numamem = acpi_data_push(table_data, sizeof *numamem);
> -        acpi_build_srat_memory(numamem, pcms->hotplug_memory_base,
> +        acpi_build_srat_memory(numamem, pcms->hotplug_memory.base,
>                                 hotplugabble_address_space_size, 0,
>                                 MEM_AFFINITY_HOTPLUGGABLE |
>                                 MEM_AFFINITY_ENABLED);
> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> index 7072930..e51c3be 100644
> --- a/hw/i386/pc.c
> +++ b/hw/i386/pc.c
> @@ -1297,7 +1297,7 @@ FWCfgState *pc_memory_init(MachineState *machine,
>              exit(EXIT_FAILURE);
>          }
>  
> -        pcms->hotplug_memory_base =
> +        pcms->hotplug_memory.base =
>              ROUND_UP(0x100000000ULL + above_4g_mem_size, 1ULL << 30);
>  
>          if (pcms->enforce_aligned_dimm) {
> @@ -1305,17 +1305,17 @@ FWCfgState *pc_memory_init(MachineState *machine,
>              hotplug_mem_size += (1ULL << 30) * machine->ram_slots;
>          }
>  
> -        if ((pcms->hotplug_memory_base + hotplug_mem_size) <
> +        if ((pcms->hotplug_memory.base + hotplug_mem_size) <
>              hotplug_mem_size) {
>              error_report("unsupported amount of maximum memory: " RAM_ADDR_FMT,
>                           machine->maxram_size);
>              exit(EXIT_FAILURE);
>          }
>  
> -        memory_region_init(&pcms->hotplug_memory, OBJECT(pcms),
> +        memory_region_init(&pcms->hotplug_memory.mr, OBJECT(pcms),
>                             "hotplug-memory", hotplug_mem_size);
> -        memory_region_add_subregion(system_memory, pcms->hotplug_memory_base,
> -                                    &pcms->hotplug_memory);
> +        memory_region_add_subregion(system_memory, pcms->hotplug_memory.base,
> +                                    &pcms->hotplug_memory.mr);
>      }
>  
>      /* Initialize PC system firmware */
> @@ -1333,9 +1333,9 @@ FWCfgState *pc_memory_init(MachineState *machine,
>      fw_cfg = bochs_bios_init();
>      rom_set_fw(fw_cfg);
>  
> -    if (guest_info->has_reserved_memory && pcms->hotplug_memory_base) {
> +    if (guest_info->has_reserved_memory && pcms->hotplug_memory.base) {
>          uint64_t *val = g_malloc(sizeof(*val));
> -        *val = cpu_to_le64(ROUND_UP(pcms->hotplug_memory_base, 0x1ULL << 30));
> +        *val = cpu_to_le64(ROUND_UP(pcms->hotplug_memory.base, 0x1ULL << 30));
>          fw_cfg_add_file(fw_cfg, "etc/reserved-memory-end", val, sizeof(*val));
>      }
>  
> @@ -1575,8 +1575,8 @@ static void pc_dimm_plug(HotplugHandler *hotplug_dev,
>          align = memory_region_get_alignment(mr);
>      }
>  
> -    addr = pc_dimm_get_free_addr(pcms->hotplug_memory_base,
> -                                 memory_region_size(&pcms->hotplug_memory),
> +    addr = pc_dimm_get_free_addr(pcms->hotplug_memory.base,
> +                                 memory_region_size(&pcms->hotplug_memory.mr),
>                                   !addr ? NULL : &addr, align,
>                                   memory_region_size(mr), &local_err);
>      if (local_err) {
> @@ -1630,8 +1630,8 @@ static void pc_dimm_plug(HotplugHandler *hotplug_dev,
>          goto out;
>      }
>  
> -    memory_region_add_subregion(&pcms->hotplug_memory,
> -                                addr - pcms->hotplug_memory_base, mr);
> +    memory_region_add_subregion(&pcms->hotplug_memory.mr,
> +                                addr - pcms->hotplug_memory.base, mr);
>      vmstate_register_ram(mr, dev);
>  
>      hhc = HOTPLUG_HANDLER_GET_CLASS(pcms->acpi_dev);
> @@ -1677,7 +1677,7 @@ static void pc_dimm_unplug(HotplugHandler *hotplug_dev,
>          goto out;
>      }
>  
> -    memory_region_del_subregion(&pcms->hotplug_memory, mr);
> +    memory_region_del_subregion(&pcms->hotplug_memory.mr, mr);
>      vmstate_unregister_ram(mr, dev);
>  
>      object_unparent(OBJECT(dev));
> @@ -1766,7 +1766,7 @@ pc_machine_get_hotplug_memory_region_size(Object *obj, Visitor *v, void *opaque,
>                                            const char *name, Error **errp)
>  {
>      PCMachineState *pcms = PC_MACHINE(obj);
> -    int64_t value = memory_region_size(&pcms->hotplug_memory);
> +    int64_t value = memory_region_size(&pcms->hotplug_memory.mr);
>  
>      visit_type_int(v, &value, name, errp);
>  }
> diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
> index 86c5651..328c8f7 100644
> --- a/include/hw/i386/pc.h
> +++ b/include/hw/i386/pc.h
> @@ -15,14 +15,12 @@
>  #include "hw/pci/pci.h"
>  #include "hw/boards.h"
>  #include "hw/compat.h"
> +#include "hw/mem/pc-dimm.h"
>  
>  #define HPET_INTCAP "hpet-intcap"
>  
>  /**
>   * PCMachineState:
> - * @hotplug_memory_base: address in guest RAM address space where hotplug memory
> - * address space begins.
> - * @hotplug_memory: hotplug memory addess space container
>   * @acpi_dev: link to ACPI PM device that performs ACPI hotplug handling
>   * @enforce_aligned_dimm: check that DIMM's address/size is aligned by
>   *                        backend's alignment value if provided
> @@ -32,8 +30,7 @@ struct PCMachineState {
>      MachineState parent_obj;
>  
>      /* <public> */
> -    ram_addr_t hotplug_memory_base;
> -    MemoryRegion hotplug_memory;
> +    MemoryHotplugState hotplug_memory;
>  
>      HotplugHandler *acpi_dev;
>      ISADevice *rtc;
> diff --git a/include/hw/mem/pc-dimm.h b/include/hw/mem/pc-dimm.h
> index f7b80b4..4bace7b 100644
> --- a/include/hw/mem/pc-dimm.h
> +++ b/include/hw/mem/pc-dimm.h
> @@ -70,6 +70,17 @@ typedef struct PCDIMMDeviceClass {
>      MemoryRegion *(*get_memory_region)(PCDIMMDevice *dimm);
>  } PCDIMMDeviceClass;
>  
> +/**
> + * MemoryHotplugState:
> + * @base: address in guest RAM address space where hotplug memory
> + * address space begins.
> + * @mr: hotplug memory address space container
> + */
> +typedef struct MemoryHotplugState {
> +    ram_addr_t base;
> +    MemoryRegion mr;
> +} MemoryHotplugState;
> +
>  uint64_t pc_dimm_get_free_addr(uint64_t address_space_start,
>                                 uint64_t address_space_size,
>                                 uint64_t *hint, uint64_t align, uint64_t size,