Re: [PATCH v4 0/3] hw/arm/virt: Fix CPU's default NUMA node ID

[Gavin Shan]

Hi Igor and Yanan,

On 4/3/22 7:00 PM, Gavin Shan wrote:
> When the CPU-to-NUMA association isn't provided by user, the default NUMA
> node ID for the specific CPU is returned from virt_get_default_cpu_node_id().
> Unfortunately, the default NUMA node ID breaks socket boundary and leads to
> the broken CPU topology warning message in Linux guest. This series intends
> to fix the issue.
>
>    PATCH[1/3] Uses SMP configuration to populate CPU topology
>    PATCH[2/3] Fixes the broken CPU topology by considering the socket boundary
>               when the default NUMA node ID is given
>    PATCH[3/3] Uses the populated CPU topology to build PPTT table, instead of
>               calculate it again

Please ignore this series (v4) and review v5 directly. I missed some of your
comments when v4 was posted and they will be covered in v5.

> Changelog
> =========
> v4:
>     * Apply '% ms->smp.{clusters, cores, threads} as x86 does
>       in virt_possible_cpu_arch_ids()                            (Igor)
>     * s/within cluster/within cluster\/die/ for 'core-id' in
>       qapi/machine.json                                          (Igor)
>     * Use [0 - possible_cpus->len] as ACPI processor UID to
>       build PPTT table and PATCH[v3 4/4] is dropped              (Igor)
> v3:
>     * Split PATCH[v2 1/3] to PATCH[v3 1/4] and PATCH[v3 2/4]     (Yanan)
>     * Don't take account of die ID in CPU topology population
>       and added assert(!mc->smp_props.dies_supported)            (Yanan/Igor)
>     * Assign cluster_id and use it when building PPTT table      (Yanan/Igor)
> v2:
>     * Populate the CPU topology in virt_possible_cpu_arch_ids()
>       so that it can be reused in virt_get_default_cpu_node_id() (Igor)
>     * Added PATCH[2/3] to use the existing CPU topology when the
>       PPTT table is built                                        (Igor)
>     * Added PATCH[3/3] to take thread ID as ACPI processor ID
>       in MADT and SRAT table                                     (Gavin)

Thanks,
Gavin

> Gavin Shan (3):
>    hw/arm/virt: Consider SMP configuration in CPU topology
>    hw/arm/virt: Fix CPU's default NUMA node ID
>    hw/acpi/aml-build: Use existing CPU topology to build PPTT table
>
>   hw/acpi/aml-build.c | 95 +++++++++++++++++++++++++++++++++------------
>   hw/arm/virt.c       | 19 ++++++++-
>   qapi/machine.json   |  6 ++-
>   3 files changed, 92 insertions(+), 28 deletions(-)