On 23/5/23 14:49, Alex Bennée wrote:
I don't think I can remove the parameters directly but certainly mark
them as deprecated.

Message-Id: <20230420150009.1675181-6-alex.ben...@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
Message-Id: <20230503091756.1453057-6-alex.ben...@linaro.org>
Signed-off-by: Alex Bennée <alex.ben...@linaro.org>
Message-Id: <20230505155336.137393-6-alex.ben...@linaro.org>

---
v4
   - used @deprecated in json
   - added note to deprecated.rst
---
  docs/about/deprecated.rst |  9 +++++++++
  qapi/trace.json           | 38 ++++++++++++++++++--------------------
  2 files changed, 27 insertions(+), 20 deletions(-)


@@ -52,19 +53,17 @@
  #
  # @name: Event name pattern (case-sensitive glob).
  #
-# @vcpu: The vCPU to query (any by default; since 2.7).
+# @vcpu: The vCPU to query (since 2.7).
+#
+# Features:
+# @deprecated: Member @vcpu is deprecated, and always false.
  #
  # Returns: a list of @TraceEventInfo for the matching events
  #
  # An event is returned if:
  #
-# - its name matches the @name pattern, and
-# - if @vcpu is given, the event has the "vcpu" property.
-#
-# Therefore, if @vcpu is given, the operation will only match per-vCPU
-# events, returning their state on the specified vCPU. Special case:
-# if @name is an exact match, @vcpu is given and the event does not
-# have the "vcpu" property, an error is returned.
+# - its name matches the @name pattern
+#   There are no longer any per-vCPU events

Maybe convert the 2 spaces by a newline, or even better simply:

  # An event is returned if its name matches the @name pattern
  # (There are no longer any per-vCPU events).

  #
  # Since: 2.2
  #
@@ -75,7 +74,8 @@
  # <- { "return": [ { "name": "qemu_memalign", "state": "disabled", "vcpu": 
false } ] }
  ##
  { 'command': 'trace-event-get-state',
-  'data': {'name': 'str', '*vcpu': 'int'},
+  'data': {'name': 'str',
+           '*vcpu': {'type': 'int', 'features': ['deprecated'] } },
    'returns': ['TraceEventInfo'] }
##
@@ -91,15 +91,13 @@
  #
  # @vcpu: The vCPU to act upon (all by default; since 2.7).
  #
-# An event's state is modified if:
+# Features:
+# @deprecated: Member @vcpu is deprecated, and always false.
  #
-# - its name matches the @name pattern, and
-# - if @vcpu is given, the event has the "vcpu" property.
+# An event's state is modified if:
  #
-# Therefore, if @vcpu is given, the operation will only match per-vCPU
-# events, setting their state on the specified vCPU. Special case: if
-# @name is an exact match, @vcpu is given and the event does not have
-# the "vcpu" property, an error is returned.
+# - its name matches the @name pattern
+#   There are no longer any per-vCPU events

Ditto.

Otherwise:
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>

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