Re: [RFC v1 2/4] qemu: patch guest SRAT for GPU memory

[Philippe Mathieu-Daudé]

On 6/6/23 01:50, ankita@nvidia.com wrote:
> From: Ankit Agrawal <ankita@nvidia.com>
>
> The guest VM adds the GPU memory as (upto 8) separate memory-less NUMA
> nodes. ACPI SRAT need to thus insert proximity domains and tag them as
> MEM_AFFINITY_HOTPLUGGABLE. The VM kernel can then parse the SRAT and
> create NUMA nodes.
>
> Signed-off-by: Ankit Agrawal <ankita@nvidia.com>
> ---
>   hw/arm/virt-acpi-build.c | 54 ++++++++++++++++++++++++++++++++++++++++
>   1 file changed, 54 insertions(+)
>
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c


>   /*
>    * ACPI spec, Revision 5.1
>    * 5.2.16 System Resource Affinity Table (SRAT)
> @@ -568,6 +620,8 @@ build_srat(GArray *table_data, BIOSLinker *linker, 
> VirtMachineState *vms)

There is a x86 build_srat() equivalent.

So some abstraction in hw/acpi/srat.c is possible.

>       }
>   
> +    build_srat_devmem(table_data);
> +
>       acpi_table_end(linker, &table);
>   }
>