Re: [Qemu-devel] [RFC PATCH 08/26] ppc/xive: add flags to the XIVE interrupt source

[David Gibson]

On Wed, Jul 05, 2017 at 07:13:21PM +0200, Cédric Le Goater wrote:
> These flags define some characteristics of the source :
> 
>  - XIVE_SRC_H_INT_ESB  the Event State Buffer are controlled with a
>                        specific hcall H_INT_ESB

What's the other option?

>  - XIVE_SRC_LSI        LSI or MSI source

Hrm.  This definitely duplicates info that is in the XICS per irq
state which you're re-using (and which you're using in the xive code
at this point).

>  - XIVE_SRC_TRIGGER    the full function page supports trigger
>  - XIVE_SRC_STORE_EOI  EOI can with a store.
> 
> Signed-off-by: Cédric Le Goater <address@hidden>
> ---
>  hw/intc/xive.c        | 1 +
>  include/hw/ppc/xive.h | 9 +++++++++
>  2 files changed, 10 insertions(+)
> 
> diff --git a/hw/intc/xive.c b/hw/intc/xive.c
> index 816031b8ac81..8f8bb8b787bd 100644
> --- a/hw/intc/xive.c
> +++ b/hw/intc/xive.c
> @@ -345,6 +345,7 @@ static Property xive_ics_properties[] = {
>      DEFINE_PROP_UINT32("nr-irqs", ICSState, nr_irqs, 0),
>      DEFINE_PROP_UINT32("irq-base", ICSState, offset, 0),
>      DEFINE_PROP_UINT32("shift", XiveICSState, esb_shift, 0),
> +    DEFINE_PROP_UINT64("flags", XiveICSState, flags, 0),
>      DEFINE_PROP_END_OF_LIST(),
>  };
>  
> diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
> index 5303d96f5f59..1178300c9df3 100644
> --- a/include/hw/ppc/xive.h
> +++ b/include/hw/ppc/xive.h
> @@ -30,9 +30,18 @@ typedef struct XiveICSState XiveICSState;
>  #define TYPE_ICS_XIVE "xive-source"
>  #define ICS_XIVE(obj) OBJECT_CHECK(XiveICSState, (obj), TYPE_ICS_XIVE)
>  
> +/*
> + * XIVE Interrupt source flags
> + */
> +#define XIVE_SRC_H_INT_ESB     (1ull << (63 - 60))
> +#define XIVE_SRC_LSI           (1ull << (63 - 61))
> +#define XIVE_SRC_TRIGGER       (1ull << (63 - 62))
> +#define XIVE_SRC_STORE_EOI     (1ull << (63 - 63))
> +
>  struct XiveICSState {
>      ICSState parent_obj;
>  
> +    uint64_t     flags;
>      uint32_t     esb_shift;
>      MemoryRegion esb_iomem;
>  

-- 
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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