Re: [PATCH v2 1/2] qapi/machine-s390x: add QAPI event SCLP_CPI_INFO_AVAILABLE

[Nina Schoetterl-Glausch <nsg@linux.ibm.com>]

On Mon, 2025-10-13 at 15:39 +0200, Shalini Chellathurai Saroja wrote:
> Add QAPI event SCLP_CPI_INFO_AVAILABLE to notify the availability
> of Control-Program Identification data in QOM.
> 
> Signed-off-by: Shalini Chellathurai Saroja <shalini@linux.ibm.com>
> Suggested-by: Thomas Huth <thuth@redhat.com>
> ---
>  hw/s390x/sclpcpi.c      |  4 ++++
>  qapi/machine-s390x.json | 25 +++++++++++++++++++++++++
>  2 files changed, 29 insertions(+)
> 
> diff --git a/hw/s390x/sclpcpi.c b/hw/s390x/sclpcpi.c
> index 7aa039d510..90da61b1c8 100644
> --- a/hw/s390x/sclpcpi.c
> +++ b/hw/s390x/sclpcpi.c
> @@ -54,6 +54,7 @@
>  #include "hw/s390x/event-facility.h"
>  #include "hw/s390x/ebcdic.h"
>  #include "qapi/qapi-visit-machine.h"
> +#include "qapi/qapi-events-machine-s390x.h"
>  #include "migration/vmstate.h"
>  
>  typedef struct Data {
> @@ -106,6 +107,9 @@ static int write_event_data(SCLPEvent *event, EventBufferHeader *evt_buf_hdr)
>      e->timestamp = qemu_clock_get_ns(QEMU_CLOCK_HOST);
>  
>      cpim->ebh.flags = SCLP_EVENT_BUFFER_ACCEPTED;
> +
> +    qapi_event_send_sclp_cpi_info_available(true);
> +
>      return SCLP_RC_NORMAL_COMPLETION;
>  }
>  
> diff --git a/qapi/machine-s390x.json b/qapi/machine-s390x.json
> index 966dbd61d2..338653e0b8 100644
> --- a/qapi/machine-s390x.json
> +++ b/qapi/machine-s390x.json
> @@ -119,3 +119,28 @@
>  { 'command': 'query-s390x-cpu-polarization', 'returns': 'CpuPolarizationInfo',
>    'features': [ 'unstable' ]
>  }
> +
> +##
> +# @SCLP_CPI_INFO_AVAILABLE:
> +#
> +# Emitted when the Control-Program Identification data is available
> +# in the QOM tree.
> +#
> +# @iscpiavailable: is CPI data available in QOM
> +#
> +# Features:
> +#
> +# @unstable: This event is experimental.
> +#
> +# Since: 10.2
> +#
> +# .. qmp-example::
> +#
> +#     <- { "event": "SCLP_CPI_INFO_AVAILABLE",
> +#          "data": { "iscpiavailable": true },
> +#          "timestamp": { "seconds": 1401385907, "microseconds": 422329 } }
> +##
> +{ 'event': 'SCLP_CPI_INFO_AVAILABLE',
> +  'data': { 'iscpiavailable': 'bool' },


What is the point of this payload? 

> +  'features': [ 'unstable' ]
> +}

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