[v3,3/5] hw/acpi-build: build SRAT memory affinity structures for DIMM devices

ACPI 6.2A Table 5-129 "SPA Range Structure" requires the proximity
domain of a NVDIMM SPA range must match with corresponding entry in
SRAT table.

The address ranges of vNVDIMM in QEMU are allocated from the
hot-pluggable address space, which is entirely covered by one SRAT
memory affinity structure. However, users can set the vNVDIMM
proximity domain in NFIT SPA range structure by the 'node' property of
'-device nvdimm' to a value different than the one in the above SRAT
memory affinity structure.

In order to solve such proximity domain mismatch, this patch builds
one SRAT memory affinity structure for each DIMM device present at
boot time, including both PC-DIMM and NVDIMM, with the proximity
domain specified in '-device pc-dimm' or '-device nvdimm'.

The remaining hot-pluggable address space is covered by one or multiple
SRAT memory affinity structures with the proximity domain of the last
node as before.

Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
---
 hw/i386/acpi-build.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 56 insertions(+), 4 deletions(-)

On Mon,  5 Mar 2018 14:57:08 +0800
Haozhong Zhang <haozhong.zhang@intel.com> wrote:

> ACPI 6.2A Table 5-129 "SPA Range Structure" requires the proximity
> domain of a NVDIMM SPA range must match with corresponding entry in
> SRAT table.
> 
> The address ranges of vNVDIMM in QEMU are allocated from the
> hot-pluggable address space, which is entirely covered by one SRAT
> memory affinity structure. However, users can set the vNVDIMM
> proximity domain in NFIT SPA range structure by the 'node' property of
> '-device nvdimm' to a value different than the one in the above SRAT
> memory affinity structure.
> 
> In order to solve such proximity domain mismatch, this patch builds
> one SRAT memory affinity structure for each DIMM device present at
> boot time, including both PC-DIMM and NVDIMM, with the proximity
> domain specified in '-device pc-dimm' or '-device nvdimm'.
> 
> The remaining hot-pluggable address space is covered by one or multiple
> SRAT memory affinity structures with the proximity domain of the last
> node as before.
> 
> Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
> ---
>  hw/i386/acpi-build.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++----
>  1 file changed, 56 insertions(+), 4 deletions(-)
> 
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index deb440f286..2ca0317386 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -2323,6 +2323,59 @@ build_tpm2(GArray *table_data, BIOSLinker *linker, GArray *tcpalog)
>  #define HOLE_640K_START  (640 * 1024)
>  #define HOLE_640K_END   (1024 * 1024)
>  
> +static void build_srat_hotpluggable_memory(GArray *table_data, uint64_t base,
> +                                           uint64_t len, int default_node)
> +{
> +    MemoryDeviceInfoList *info_list = qmp_pc_dimm_device_list();
> +    MemoryDeviceInfoList *info;
> +    MemoryDeviceInfo *mi;
> +    PCDIMMDeviceInfo *di;
> +    uint64_t end = base + len, cur, addr, size;
> +    int node;
> +    bool is_nvdimm;
> +    AcpiSratMemoryAffinity *numamem;
> +    MemoryAffinityFlags flags;
> +
> +    for (cur = base, info = info_list;
> +         cur < end;
> +         cur += size, info = info->next) {
> +        numamem = acpi_data_push(table_data, sizeof *numamem);
> +
> +        if (!info) {
> +            build_srat_memory(numamem, cur, end - cur, default_node,
> +                              MEM_AFFINITY_HOTPLUGGABLE | MEM_AFFINITY_ENABLED);
> +            break;
> +        }
> +
> +        mi = info->value;
> +        is_nvdimm = (mi->type == MEMORY_DEVICE_INFO_KIND_NVDIMM);
> +        di = !is_nvdimm ? mi->u.dimm.data :
> +                          qapi_NVDIMMDeviceInfo_base(mi->u.nvdimm.data);
> +
> +        addr = di->addr;
maybe drop addr and use di->addr directly

> +        if (cur < addr) {
> +            build_srat_memory(numamem, cur, addr - cur, default_node,
> +                              MEM_AFFINITY_HOTPLUGGABLE | MEM_AFFINITY_ENABLED);
> +            numamem = acpi_data_push(table_data, sizeof *numamem);
> +        }
> +
> +        size = di->size;
> +        node = di->node;
the same wrt di->node

> +
> +        flags = MEM_AFFINITY_ENABLED;
> +        if (di->hotpluggable) {
> +            flags |= MEM_AFFINITY_HOTPLUGGABLE;
> +        }
> +        if (is_nvdimm) {
> +            flags |= MEM_AFFINITY_NON_VOLATILE;
> +        }
> +
> +        build_srat_memory(numamem, addr, size, node, flags);
> +    }
> +
> +    qapi_free_MemoryDeviceInfoList(info_list);
> +}
> +
>  static void
>  build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
>  {
> @@ -2434,10 +2487,9 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
>       * providing _PXM method if necessary.
>       */
>      if (hotplugabble_address_space_size) {
> -        numamem = acpi_data_push(table_data, sizeof *numamem);
> -        build_srat_memory(numamem, pcms->hotplug_memory.base,
> -                          hotplugabble_address_space_size, pcms->numa_nodes - 1,
> -                          MEM_AFFINITY_HOTPLUGGABLE | MEM_AFFINITY_ENABLED);
> +        build_srat_hotpluggable_memory(table_data, pcms->hotplug_memory.base,
> +                                       hotplugabble_address_space_size,
> +                                       pcms->numa_nodes - 1);
>      }
>  
>      build_header(linker, table_data,