Re: [Qemu-devel] [RFC PATCH 13/15] spapr_pci: provide node start offset via spapr_populate_pci_dt()

[David Gibson]

On Wed, Apr 29, 2015 at 02:20:22PM -0500, Michael Roth wrote:
> PHB hotplug re-uses PHB device tree generation code and passes
> it to a guest via RTAS. Doing this requires knowledge of where
> exactly in the device tree the node describing the PHB begins.
> 
> Provide this via a new optional pointer that can be used to
> store the PHB node's start offset.
> 
> Signed-off-by: Michael Roth <address@hidden>

Reviewed-by: David Gibson <address@hidden>

> ---
>  hw/ppc/spapr.c              | 2 +-
>  hw/ppc/spapr_pci.c          | 6 +++++-
>  include/hw/pci-host/spapr.h | 3 ++-
>  3 files changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index 042e7a9..ecf40e4 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -767,7 +767,7 @@ static void spapr_finalize_fdt(sPAPREnvironment *spapr,
>      }
>  
>      QLIST_FOREACH(phb, &spapr->phbs, list) {
> -        ret = spapr_populate_pci_dt(phb, PHANDLE_XICP, fdt);
> +        ret = spapr_populate_pci_dt(phb, PHANDLE_XICP, fdt, NULL);
>      }
>  
>      if (ret < 0) {
> diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
> index e37de28..66fe85f 100644
> --- a/hw/ppc/spapr_pci.c
> +++ b/hw/ppc/spapr_pci.c
> @@ -1534,7 +1534,8 @@ PCIHostState *spapr_create_phb(sPAPREnvironment *spapr, 
> int index)
>  
>  int spapr_populate_pci_dt(sPAPRPHBState *phb,
>                            uint32_t xics_phandle,
> -                          void *fdt)
> +                          void *fdt,
> +                          int *node_offset)
>  {
>      int bus_off, i, j, ret;
>      char nodename[256];
> @@ -1578,6 +1579,9 @@ int spapr_populate_pci_dt(sPAPRPHBState *phb,
>      if (bus_off < 0) {
>          return bus_off;
>      }
> +    if (node_offset) {
> +        *node_offset = bus_off;
> +    }
>  
>      /* Write PHB properties */
>      _FDT(fdt_setprop_string(fdt, bus_off, "device_type", "pci"));
> diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h
> index 9dca388..32a9213 100644
> --- a/include/hw/pci-host/spapr.h
> +++ b/include/hw/pci-host/spapr.h
> @@ -126,7 +126,8 @@ PCIHostState *spapr_create_phb(sPAPREnvironment *spapr, 
> int index);
>  
>  int spapr_populate_pci_dt(sPAPRPHBState *phb,
>                            uint32_t xics_phandle,
> -                          void *fdt);
> +                          void *fdt,
> +                          int *node_offset);
>  
>  void spapr_pci_msi_init(sPAPREnvironment *spapr, hwaddr addr);
>  

-- 
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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