Re: [Qemu-devel] [RFC PATCH 1/3] cpu: introduce CpuTopoInfo structure for argument simplification

[Gu Zheng <guz.fnst@cn.fujitsu.com>]

Correct the author.
From: Chen Fan <chen.fan.fnst@cn.fujitsu.com>

On 06/27/2014 06:03 PM, Gu Zheng wrote:

> Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
> Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
> ---
>  target-i386/topology.h |   33 +++++++++++++++++----------------
>  1 files changed, 17 insertions(+), 16 deletions(-)
> 
> diff --git a/target-i386/topology.h b/target-i386/topology.h
> index 07a6c5f..e9ff89c 100644
> --- a/target-i386/topology.h
> +++ b/target-i386/topology.h
> @@ -47,6 +47,12 @@
>   */
>  typedef uint32_t apic_id_t;
>  
> +typedef struct X86CPUTopoInfo {
> +    unsigned pkg_id;
> +    unsigned core_id;
> +    unsigned smt_id;
> +} X86CPUTopoInfo;
> +
>  /* Return the bit width needed for 'count' IDs
>   */
>  static unsigned apicid_bitwidth_for_count(unsigned count)
> @@ -92,13 +98,11 @@ static inline unsigned apicid_pkg_offset(unsigned nr_cores, unsigned nr_threads)
>   */
>  static inline apic_id_t apicid_from_topo_ids(unsigned nr_cores,
>                                               unsigned nr_threads,
> -                                             unsigned pkg_id,
> -                                             unsigned core_id,
> -                                             unsigned smt_id)
> +                                             const X86CPUTopoInfo *topo)
>  {
> -    return (pkg_id  << apicid_pkg_offset(nr_cores, nr_threads)) |
> -           (core_id << apicid_core_offset(nr_cores, nr_threads)) |
> -           smt_id;
> +    return (topo->pkg_id  << apicid_pkg_offset(nr_cores, nr_threads)) |
> +           (topo->core_id << apicid_core_offset(nr_cores, nr_threads)) |
> +           topo->smt_id;
>  }
>  
>  /* Calculate thread/core/package IDs for a specific topology,
> @@ -107,14 +111,12 @@ static inline apic_id_t apicid_from_topo_ids(unsigned nr_cores,
>  static inline void x86_topo_ids_from_idx(unsigned nr_cores,
>                                           unsigned nr_threads,
>                                           unsigned cpu_index,
> -                                         unsigned *pkg_id,
> -                                         unsigned *core_id,
> -                                         unsigned *smt_id)
> +                                         X86CPUTopoInfo *topo)
>  {
>      unsigned core_index = cpu_index / nr_threads;
> -    *smt_id = cpu_index % nr_threads;
> -    *core_id = core_index % nr_cores;
> -    *pkg_id = core_index / nr_cores;
> +    topo->smt_id = cpu_index % nr_threads;
> +    topo->core_id = core_index % nr_cores;
> +    topo->pkg_id = core_index / nr_cores;
>  }
>  
>  /* Make APIC ID for the CPU 'cpu_index'
> @@ -125,10 +127,9 @@ static inline apic_id_t x86_apicid_from_cpu_idx(unsigned nr_cores,
>                                                  unsigned nr_threads,
>                                                  unsigned cpu_index)
>  {
> -    unsigned pkg_id, core_id, smt_id;
> -    x86_topo_ids_from_idx(nr_cores, nr_threads, cpu_index,
> -                          &pkg_id, &core_id, &smt_id);
> -    return apicid_from_topo_ids(nr_cores, nr_threads, pkg_id, core_id, smt_id);
> +    X86CPUTopoInfo topo;
> +    x86_topo_ids_from_idx(nr_cores, nr_threads, cpu_index, &topo);
> +    return apicid_from_topo_ids(nr_cores, nr_threads, &topo);
>  }
>  
>  #endif /* TARGET_I386_TOPOLOGY_H */