Re: [Qemu-devel] [PATCH for-2.10 06/23] spapr: add node-id property to sPAPR core

[David Gibson]

On Wed, Mar 22, 2017 at 02:32:31PM +0100, Igor Mammedov wrote:
> it will allow switching from cpu_index to core based numa
> mapping in follow up patches.
> 
> Signed-off-by: Igor Mammedov <address@hidden>

Reviewed-by: David Gibson <address@hidden>

> ---
>  include/hw/ppc/spapr_cpu_core.h |  1 +
>  include/qom/cpu.h               |  2 ++
>  hw/ppc/spapr.c                  | 17 +++++++++++++++++
>  hw/ppc/spapr_cpu_core.c         | 11 ++++++++---
>  4 files changed, 28 insertions(+), 3 deletions(-)
> 
> diff --git a/include/hw/ppc/spapr_cpu_core.h b/include/hw/ppc/spapr_cpu_core.h
> index 3c35665..93051e9 100644
> --- a/include/hw/ppc/spapr_cpu_core.h
> +++ b/include/hw/ppc/spapr_cpu_core.h
> @@ -27,6 +27,7 @@ typedef struct sPAPRCPUCore {
>  
>      /*< public >*/
>      void *threads;
> +    int node_id;
>  } sPAPRCPUCore;
>  
>  typedef struct sPAPRCPUCoreClass {
> diff --git a/include/qom/cpu.h b/include/qom/cpu.h
> index c3292ef..7f27d56 100644
> --- a/include/qom/cpu.h
> +++ b/include/qom/cpu.h
> @@ -258,6 +258,8 @@ typedef void (*run_on_cpu_func)(CPUState *cpu, 
> run_on_cpu_data data);
>  
>  struct qemu_work_item;
>  
> +#define CPU_UNSET_NUMA_NODE_ID -1
> +
>  /**
>   * CPUState:
>   * @cpu_index: CPU index (informative).
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index 9dcbbcc..9c61721 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -2770,9 +2770,11 @@ static void spapr_core_pre_plug(HotplugHandler 
> *hotplug_dev, DeviceState *dev,
>      MachineClass *mc = MACHINE_GET_CLASS(hotplug_dev);
>      Error *local_err = NULL;
>      CPUCore *cc = CPU_CORE(dev);
> +    sPAPRCPUCore *sc = SPAPR_CPU_CORE(dev);
>      char *base_core_type = spapr_get_cpu_core_type(machine->cpu_model);
>      const char *type = object_get_typename(OBJECT(dev));
>      CPUArchId *core_slot;
> +    int node_id;
>      int index;
>  
>      if (dev->hotplugged && !mc->has_hotpluggable_cpus) {
> @@ -2801,6 +2803,21 @@ static void spapr_core_pre_plug(HotplugHandler 
> *hotplug_dev, DeviceState *dev,
>          goto out;
>      }
>  
> +    node_id = numa_get_node_for_cpu(cc->core_id);
> +    if (node_id == nb_numa_nodes) {
> +        /* by default CPUState::numa_node was 0 if it's not set via CLI
> +         * keep it this way for now but in future we probably should
> +         * refuse to start up with incomplete numa mapping */
> +        node_id = 0;
> +    }
> +    if (sc->node_id == CPU_UNSET_NUMA_NODE_ID) {
> +        sc->node_id = node_id;
> +    } else if (sc->node_id != node_id) {
> +        error_setg(&local_err, "node-id %d must match numa node specified"
> +            "with -numa option for cpu-index %d", sc->node_id, cc->core_id);
> +        goto out;
> +    }
> +
>  out:
>      g_free(base_core_type);
>      error_propagate(errp, local_err);
> diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
> index 6883f09..25988f8 100644
> --- a/hw/ppc/spapr_cpu_core.c
> +++ b/hw/ppc/spapr_cpu_core.c
> @@ -163,7 +163,6 @@ static void spapr_cpu_core_realize(DeviceState *dev, 
> Error **errp)
>      const char *typename = object_class_get_name(scc->cpu_class);
>      size_t size = object_type_get_instance_size(typename);
>      Error *local_err = NULL;
> -    int core_node_id = numa_get_node_for_cpu(cc->core_id);;
>      void *obj;
>      int i, j;
>  
> @@ -181,10 +180,10 @@ static void spapr_cpu_core_realize(DeviceState *dev, 
> Error **errp)
>  
>          /* Set NUMA node for the added CPUs  */
>          node_id = numa_get_node_for_cpu(cs->cpu_index);
> -        if (node_id != core_node_id) {
> +        if (node_id != sc->node_id) {
>              error_setg(&local_err, "Invalid node-id=%d of thread[cpu-index: 
> %d]"
>                  " on CPU[core-id: %d, node-id: %d], node-id must be the 
> same",
> -                 node_id, cs->cpu_index, cc->core_id, core_node_id);
> +                 node_id, cs->cpu_index, cc->core_id, sc->node_id);
>              goto err;
>          }
>          if (node_id < nb_numa_nodes) {
> @@ -250,6 +249,11 @@ static const char *spapr_core_models[] = {
>      "POWER9_v1.0",
>  };
>  
> +static Property spapr_cpu_core_properties[] = {
> +    DEFINE_PROP_INT32("node-id", sPAPRCPUCore, node_id, 
> CPU_UNSET_NUMA_NODE_ID),
> +    DEFINE_PROP_END_OF_LIST()
> +};
> +
>  void spapr_cpu_core_class_init(ObjectClass *oc, void *data)
>  {
>      DeviceClass *dc = DEVICE_CLASS(oc);
> @@ -257,6 +261,7 @@ void spapr_cpu_core_class_init(ObjectClass *oc, void 
> *data)
>  
>      dc->realize = spapr_cpu_core_realize;
>      dc->unrealize = spapr_cpu_core_unrealizefn;
> +    dc->props = spapr_cpu_core_properties;
>      scc->cpu_class = cpu_class_by_name(TYPE_POWERPC_CPU, data);
>      g_assert(scc->cpu_class);
>  }

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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