[PATCH v4 20/22] qapi: introduce x-query-irq QMP command

Daniel P. Berrangé posted 22 patches 4 years, 3 months ago
[PATCH v4 20/22] qapi: introduce x-query-irq QMP command
Posted by Daniel P. Berrangé 4 years, 3 months ago
This is a counterpart to the HMP "info irq" command. It is being
added with an "x-" prefix because this QMP command is intended as an
adhoc debugging tool and will thus not be modelled in QAPI as fully
structured data, nor will it have long term guaranteed stability.
The existing HMP command is rewritten to call the QMP command.

This command is unable to use the pre-existing HumanReadableText,
because if 'common.json' is included into 'machine-target.json'
the static marshalling method for HumanReadableText will be reported
as unused by the compiler on all architectures except s390x.

Possible options were

 1 Support 'if' conditionals on 'include' statements in QAPI
 2 Add further commands to 'machine-target.json' that use
   HumanReadableText, such that it has at least one usage
   on all architecture targets.
 3 Duplicate HumanReadableText as TargetHumanReadableText
   adding conditions

This patch takes option (3) in the belief that we will eventually
get to a point where option (2) happens, and TargetHumanReadableText
can be removed again.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 hmp-commands-info.hx |  2 +-
 monitor/hmp-cmds.c   | 38 --------------------------------------
 monitor/qmp-cmds.c   | 44 ++++++++++++++++++++++++++++++++++++++++++++
 qapi/machine.json    | 12 ++++++++++++
 4 files changed, 57 insertions(+), 39 deletions(-)

diff --git a/hmp-commands-info.hx b/hmp-commands-info.hx
index c2d7275bf5..407a1da800 100644
--- a/hmp-commands-info.hx
+++ b/hmp-commands-info.hx
@@ -159,7 +159,7 @@ ERST
         .args_type  = "",
         .params     = "",
         .help       = "show the interrupts statistics (if available)",
-        .cmd        = hmp_info_irq,
+        .cmd_info_hrt = qmp_x_query_irq,
     },
 
 SRST
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index 90f9a64573..8ef605e29a 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -784,44 +784,6 @@ static void hmp_info_pci_device(Monitor *mon, const PciDeviceInfo *dev)
     }
 }
 
-static int hmp_info_irq_foreach(Object *obj, void *opaque)
-{
-    InterruptStatsProvider *intc;
-    InterruptStatsProviderClass *k;
-    Monitor *mon = opaque;
-
-    if (object_dynamic_cast(obj, TYPE_INTERRUPT_STATS_PROVIDER)) {
-        intc = INTERRUPT_STATS_PROVIDER(obj);
-        k = INTERRUPT_STATS_PROVIDER_GET_CLASS(obj);
-        uint64_t *irq_counts;
-        unsigned int nb_irqs, i;
-        if (k->get_statistics &&
-            k->get_statistics(intc, &irq_counts, &nb_irqs)) {
-            if (nb_irqs > 0) {
-                monitor_printf(mon, "IRQ statistics for %s:\n",
-                               object_get_typename(obj));
-                for (i = 0; i < nb_irqs; i++) {
-                    if (irq_counts[i] > 0) {
-                        monitor_printf(mon, "%2d: %" PRId64 "\n", i,
-                                       irq_counts[i]);
-                    }
-                }
-            }
-        } else {
-            monitor_printf(mon, "IRQ statistics not available for %s.\n",
-                           object_get_typename(obj));
-        }
-    }
-
-    return 0;
-}
-
-void hmp_info_irq(Monitor *mon, const QDict *qdict)
-{
-    object_child_foreach_recursive(object_get_root(),
-                                   hmp_info_irq_foreach, mon);
-}
-
 static int hmp_info_pic_foreach(Object *obj, void *opaque)
 {
     InterruptStatsProvider *intc;
diff --git a/monitor/qmp-cmds.c b/monitor/qmp-cmds.c
index a9766fa38d..343353e27a 100644
--- a/monitor/qmp-cmds.c
+++ b/monitor/qmp-cmds.c
@@ -41,6 +41,7 @@
 #include "exec/ramlist.h"
 #include "hw/mem/memory-device.h"
 #include "hw/acpi/acpi_dev_interface.h"
+#include "hw/intc/intc.h"
 #include "hw/rdma/rdma.h"
 
 NameInfo *qmp_query_name(Error **errp)
@@ -422,3 +423,46 @@ HumanReadableText *qmp_x_query_ramblock(Error **errp)
 
     return human_readable_text_from_str(buf);
 }
+
+static int qmp_x_query_irq_foreach(Object *obj, void *opaque)
+{
+    InterruptStatsProvider *intc;
+    InterruptStatsProviderClass *k;
+    GString *buf = opaque;
+
+    if (object_dynamic_cast(obj, TYPE_INTERRUPT_STATS_PROVIDER)) {
+        intc = INTERRUPT_STATS_PROVIDER(obj);
+        k = INTERRUPT_STATS_PROVIDER_GET_CLASS(obj);
+        uint64_t *irq_counts;
+        unsigned int nb_irqs, i;
+        if (k->get_statistics &&
+            k->get_statistics(intc, &irq_counts, &nb_irqs)) {
+            if (nb_irqs > 0) {
+                g_string_append_printf(buf, "IRQ statistics for %s:\n",
+                                       object_get_typename(obj));
+                for (i = 0; i < nb_irqs; i++) {
+                    if (irq_counts[i] > 0) {
+                        g_string_append_printf(buf, "%2d: %" PRId64 "\n", i,
+                                               irq_counts[i]);
+                    }
+                }
+            }
+        } else {
+            g_string_append_printf(buf,
+                                   "IRQ statistics not available for %s.\n",
+                                   object_get_typename(obj));
+        }
+    }
+
+    return 0;
+}
+
+HumanReadableText *qmp_x_query_irq(Error **errp)
+{
+    g_autoptr(GString) buf = g_string_new("");
+
+    object_child_foreach_recursive(object_get_root(),
+                                   qmp_x_query_irq_foreach, buf);
+
+    return human_readable_text_from_str(buf);
+}
diff --git a/qapi/machine.json b/qapi/machine.json
index be81170c2b..ca49358292 100644
--- a/qapi/machine.json
+++ b/qapi/machine.json
@@ -1412,6 +1412,18 @@
      '*threads': 'int',
      '*maxcpus': 'int' } }
 
+##
+# @x-query-irq:
+#
+# Query interrupt statistics
+#
+# Returns: interrupt statistics
+#
+# Since: 6.2
+##
+{ 'command': 'x-query-irq',
+  'returns': 'HumanReadableText' }
+
 ##
 # @x-query-numa:
 #
-- 
2.31.1


Re: [PATCH v4 20/22] qapi: introduce x-query-irq QMP command
Posted by Philippe Mathieu-Daudé 4 years, 3 months ago
On 10/28/21 17:54, Daniel P. Berrangé wrote:
> This is a counterpart to the HMP "info irq" command. It is being
> added with an "x-" prefix because this QMP command is intended as an
> adhoc debugging tool and will thus not be modelled in QAPI as fully
> structured data, nor will it have long term guaranteed stability.
> The existing HMP command is rewritten to call the QMP command.
> 
> This command is unable to use the pre-existing HumanReadableText,
> because if 'common.json' is included into 'machine-target.json'
> the static marshalling method for HumanReadableText will be reported
> as unused by the compiler on all architectures except s390x.
> 
> Possible options were
> 
>  1 Support 'if' conditionals on 'include' statements in QAPI
>  2 Add further commands to 'machine-target.json' that use
>    HumanReadableText, such that it has at least one usage
>    on all architecture targets.
>  3 Duplicate HumanReadableText as TargetHumanReadableText
>    adding conditions
> 
> This patch takes option (3) in the belief that we will eventually
> get to a point where option (2) happens, and TargetHumanReadableText
> can be removed again.

Outdated description from v2, otherwise:
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
> ---
>  hmp-commands-info.hx |  2 +-
>  monitor/hmp-cmds.c   | 38 --------------------------------------
>  monitor/qmp-cmds.c   | 44 ++++++++++++++++++++++++++++++++++++++++++++
>  qapi/machine.json    | 12 ++++++++++++
>  4 files changed, 57 insertions(+), 39 deletions(-)


Re: [PATCH v4 20/22] qapi: introduce x-query-irq QMP command
Posted by Daniel P. Berrangé 4 years, 3 months ago
On Tue, Nov 02, 2021 at 03:57:08PM +0100, Philippe Mathieu-Daudé wrote:
> On 10/28/21 17:54, Daniel P. Berrangé wrote:
> > This is a counterpart to the HMP "info irq" command. It is being
> > added with an "x-" prefix because this QMP command is intended as an
> > adhoc debugging tool and will thus not be modelled in QAPI as fully
> > structured data, nor will it have long term guaranteed stability.
> > The existing HMP command is rewritten to call the QMP command.
> > 
> > This command is unable to use the pre-existing HumanReadableText,
> > because if 'common.json' is included into 'machine-target.json'
> > the static marshalling method for HumanReadableText will be reported
> > as unused by the compiler on all architectures except s390x.
> > 
> > Possible options were
> > 
> >  1 Support 'if' conditionals on 'include' statements in QAPI
> >  2 Add further commands to 'machine-target.json' that use
> >    HumanReadableText, such that it has at least one usage
> >    on all architecture targets.
> >  3 Duplicate HumanReadableText as TargetHumanReadableText
> >    adding conditions
> > 
> > This patch takes option (3) in the belief that we will eventually
> > get to a point where option (2) happens, and TargetHumanReadableText
> > can be removed again.
> 
> Outdated description from v2, otherwise:

Opps, this one should actually never have had this footnote,
as its command is in machine.json, not machine-target.json !

> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> 
> > Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
> > ---
> >  hmp-commands-info.hx |  2 +-
> >  monitor/hmp-cmds.c   | 38 --------------------------------------
> >  monitor/qmp-cmds.c   | 44 ++++++++++++++++++++++++++++++++++++++++++++
> >  qapi/machine.json    | 12 ++++++++++++
> >  4 files changed, 57 insertions(+), 39 deletions(-)
> 

Regards,
Daniel
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