Re: [Qemu-devel] [PATCH 4/5] spapr: Eliminate spapr_drc_get_type_str()

[Michael Roth <mdroth@linux.vnet.ibm.com>]

Quoting David Gibson (2017-06-02 02:29:51)
> This function was used in generating the device tree.  However, now that
> we have different QOM types for different DRC types we can easily store
> the information we need in the class structure and avoid this specialized
> lookup function.
> 
> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>

> ---
>  hw/ppc/spapr_drc.c         | 31 ++++---------------------------
>  include/hw/ppc/spapr_drc.h |  1 +
>  2 files changed, 5 insertions(+), 27 deletions(-)
> 
> diff --git a/hw/ppc/spapr_drc.c b/hw/ppc/spapr_drc.c
> index 27d4bd3..d43c9cd 100644
> --- a/hw/ppc/spapr_drc.c
> +++ b/hw/ppc/spapr_drc.c
> @@ -716,6 +716,7 @@ static void spapr_drc_cpu_class_init(ObjectClass *k, void *data)
>      sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
> 
>      drck->typeshift = SPAPR_DR_CONNECTOR_TYPE_SHIFT_CPU;
> +    drck->typename = "CPU";
>  }
> 
>  static void spapr_drc_pci_class_init(ObjectClass *k, void *data)
> @@ -723,6 +724,7 @@ static void spapr_drc_pci_class_init(ObjectClass *k, void *data)
>      sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
> 
>      drck->typeshift = SPAPR_DR_CONNECTOR_TYPE_SHIFT_PCI;
> +    drck->typename = "28";
>  }
> 
>  static void spapr_drc_lmb_class_init(ObjectClass *k, void *data)
> @@ -730,6 +732,7 @@ static void spapr_drc_lmb_class_init(ObjectClass *k, void *data)
>      sPAPRDRConnectorClass *drck = SPAPR_DR_CONNECTOR_CLASS(k);
> 
>      drck->typeshift = SPAPR_DR_CONNECTOR_TYPE_SHIFT_LMB;
> +    drck->typename = "MEM";
>  }
> 
>  static const TypeInfo spapr_dr_connector_info = {
> @@ -796,31 +799,6 @@ sPAPRDRConnector *spapr_drc_by_id(const char *type, uint32_t id)
>                                | (id & DRC_INDEX_ID_MASK));
>  }
> 
> -/* generate a string the describes the DRC to encode into the
> - * device tree.
> - *
> - * as documented by PAPR+ v2.7, 13.5.2.6 and C.6.1
> - */
> -static const char *spapr_drc_get_type_str(sPAPRDRConnectorType type)
> -{
> -    switch (type) {
> -    case SPAPR_DR_CONNECTOR_TYPE_CPU:
> -        return "CPU";
> -    case SPAPR_DR_CONNECTOR_TYPE_PHB:
> -        return "PHB";
> -    case SPAPR_DR_CONNECTOR_TYPE_VIO:
> -        return "SLOT";
> -    case SPAPR_DR_CONNECTOR_TYPE_PCI:
> -        return "28";
> -    case SPAPR_DR_CONNECTOR_TYPE_LMB:
> -        return "MEM";
> -    default:
> -        g_assert(false);
> -    }
> -
> -    return NULL;
> -}
> -
>  /**
>   * spapr_drc_populate_dt
>   *
> @@ -902,8 +880,7 @@ int spapr_drc_populate_dt(void *fdt, int fdt_offset, Object *owner,
>          drc_names = g_string_insert_len(drc_names, -1, "\0", 1);
> 
>          /* ibm,drc-types */
> -        drc_types = g_string_append(drc_types,
> -                                    spapr_drc_get_type_str(spapr_drc_type(drc)));
> +        drc_types = g_string_append(drc_types, drck->typename);
>          drc_types = g_string_insert_len(drc_types, -1, "\0", 1);
>      }
> 
> diff --git a/include/hw/ppc/spapr_drc.h b/include/hw/ppc/spapr_drc.h
> index 53b0f8b..8a4889a 100644
> --- a/include/hw/ppc/spapr_drc.h
> +++ b/include/hw/ppc/spapr_drc.h
> @@ -212,6 +212,7 @@ typedef struct sPAPRDRConnectorClass {
> 
>      /*< public >*/
>      sPAPRDRConnectorTypeShift typeshift;
> +    const char *typename; /* used in device tree, PAPR 13.5.2.6 & C.6.1 */
> 
>      /* accessors for guest-visible (generally via RTAS) DR state */
>      uint32_t (*set_isolation_state)(sPAPRDRConnector *drc,
> -- 
> 2.9.4
>