Re: [Qemu-devel] [RFC v2 5/6] hw/arm: ACPI SRAT changes to accommodate non-contiguous mem

[Andrew Jones <drjones@redhat.com>]

On Wed, May 16, 2018 at 04:20:25PM +0100, Shameer Kolothum wrote:
> This is in preparation for the next patch where initial ram is split
> into a non-pluggable chunk and a pc-dimm modeled mem if  the vaild
> iova regions are non-contiguous.
> 
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
> ---
>  hw/arm/virt-acpi-build.c | 24 ++++++++++++++++++++----
>  1 file changed, 20 insertions(+), 4 deletions(-)
> 
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index c7c6a57..8d17b40 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -488,7 +488,7 @@ build_srat(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
>      AcpiSratProcessorGiccAffinity *core;
>      AcpiSratMemoryAffinity *numamem;
>      int i, srat_start;
> -    uint64_t mem_base;
> +    uint64_t mem_base, mem_sz, mem_len;
>      MachineClass *mc = MACHINE_GET_CLASS(vms);
>      const CPUArchIdList *cpu_list = mc->possible_cpu_arch_ids(MACHINE(vms));
>  
> @@ -505,12 +505,28 @@ build_srat(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
>          core->flags = cpu_to_le32(1);
>      }
>  
> -    mem_base = vms->memmap[VIRT_MEM].base;
> +    mem_base = vms->bootinfo.loader_start;
> +    mem_sz = vms->bootinfo.loader_start;

mem_sz = vms->bootinfo.ram_size;

Assuming the DT generator was correct, meaning bootinfo.ram_size will
be the size of the non-pluggable dimm.


>      for (i = 0; i < nb_numa_nodes; ++i) {
>          numamem = acpi_data_push(table_data, sizeof(*numamem));
> -        build_srat_memory(numamem, mem_base, numa_info[i].node_mem, i,
> +        mem_len = MIN(numa_info[i].node_mem, mem_sz);
> +        build_srat_memory(numamem, mem_base, mem_len, i,
>                            MEM_AFFINITY_ENABLED);
> -        mem_base += numa_info[i].node_mem;
> +        mem_base += mem_len;
> +        mem_sz -= mem_len;
> +        if (!mem_sz) {
> +            break;
> +        }
> +    }
> +
> +    /* Create table for initial pc-dimm ram, if any */
> +    if (vms->bootinfo.dimm_mem) {
> +        numamem = acpi_data_push(table_data, sizeof(*numamem));
> +        build_srat_memory(numamem, vms->bootinfo.dimm_mem->base,
> +                          vms->bootinfo.dimm_mem->size,
> +                          vms->bootinfo.dimm_mem->node,
> +                          MEM_AFFINITY_ENABLED);
> +
>      }
>  
>      build_header(linker, table_data, (void *)(table_data->data + srat_start),
> -- 
> 2.7.4
> 
> 
>