Re: [PATCH] hw/arm/virt: Enable HMAT on arm virt machine

[Andrew Jones]

On Tue, Jan 25, 2022 at 05:15:34PM +0800, chenxiang via wrote:
> From: Xiang Chen <chenxiang66@hisilicon.com>
> 
> Since the patchset ("Build ACPI Heterogeneous Memory Attribute Table (HMAT)"),
> HMAT is supported, but only x86 is enabled. Enable HMAT on arm virt machine.

Hi Xiang,

What QEMU commands lines have you tested with which Linux guest kernels?

Thanks,
drew

> 
> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
> ---
>  hw/arm/Kconfig           | 1 +
>  hw/arm/virt-acpi-build.c | 7 +++++++
>  2 files changed, 8 insertions(+)
> 
> diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
> index 2e0049196d..a3c6099829 100644
> --- a/hw/arm/Kconfig
> +++ b/hw/arm/Kconfig
> @@ -29,6 +29,7 @@ config ARM_VIRT
>      select ACPI_APEI
>      select ACPI_VIOT
>      select VIRTIO_MEM_SUPPORTED
> +    select ACPI_HMAT
>  
>  config CHEETAH
>      bool
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index 449fab0080..f19b55e486 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -42,6 +42,7 @@
>  #include "hw/acpi/memory_hotplug.h"
>  #include "hw/acpi/generic_event_device.h"
>  #include "hw/acpi/tpm.h"
> +#include "hw/acpi/hmat.h"
>  #include "hw/pci/pcie_host.h"
>  #include "hw/pci/pci.h"
>  #include "hw/pci/pci_bus.h"
> @@ -990,6 +991,12 @@ void virt_acpi_build(VirtMachineState *vms, 
> AcpiBuildTables *tables)
>              build_slit(tables_blob, tables->linker, ms, vms->oem_id,
>                         vms->oem_table_id);
>          }
> +
> +        if (ms->numa_state->hmat_enabled) {
> +            acpi_add_table(table_offsets, tables_blob);
> +            build_hmat(tables_blob, tables->linker, ms->numa_state,
> +                       vms->oem_id, vms->oem_table_id);
> +        }
>      }
>  
>      if (ms->nvdimms_state->is_enabled) {
> -- 
> 2.33.0
> 
>