Re: [Qemu-ppc] [RFC PATCH 10/26] ppc/xive: record interrupt source MMIO address for hcalls

[David Gibson]

On Wed, Jul 05, 2017 at 07:13:23PM +0200, Cédric Le Goater wrote:
> The address of the MMIO page through which the Event State Buffer is
> controlled is returned to the guest by the H_INT_GET_SOURCE_INFO hcall.
> 
> Signed-off-by: Cédric Le Goater <address@hidden>
> ---
>  hw/intc/xive.c        | 3 +++
>  include/hw/ppc/xive.h | 1 +
>  2 files changed, 4 insertions(+)
> 
> diff --git a/hw/intc/xive.c b/hw/intc/xive.c
> index a1cb87a07b76..0db97fd33981 100644
> --- a/hw/intc/xive.c
> +++ b/hw/intc/xive.c
> @@ -344,6 +344,9 @@ static void xive_ics_realize(ICSState *ics, Error **errp)
>                                  ICS_BASE(xs)->offset * (1 << xs->esb_shift),
>                                  &xs->esb_iomem);
>  
> +    /* Record base address which is needed by the hcalls */
> +    xs->esb_base = x->vc_base + ICS_BASE(xs)->offset * (1 << xs->esb_shift);

This doesn't seem like it needs to be stored in the persistent object
- it can be calculated when the hcall is made.  Plus if it's for the
hcll it only makes sense for spapr.

>      qemu_register_reset(xive_ics_reset, xs);
>  }
>  
> diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
> index 1178300c9df3..b06bc861b845 100644
> --- a/include/hw/ppc/xive.h
> +++ b/include/hw/ppc/xive.h
> @@ -43,6 +43,7 @@ struct XiveICSState {
>  
>      uint64_t     flags;
>      uint32_t     esb_shift;
> +    hwaddr       esb_base;
>      MemoryRegion esb_iomem;
>  
>      XIVE         *xive;

-- 
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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