i386/xen: add monitor commands to test event injection

Specifically add listing, injection of event channels.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Paul Durrant <paul@xen.org>

qapi/misc-target.json

@@ -380,3 +380,119 @@
 #
 ##
 { 'command': 'query-sgx-capabilities', 'returns': 'SGXInfo', 'if': 'TARGET_I386' }
+
+
+##
+# @EvtchnPortType:
+#
+# An enumeration of Xen event channel port types.
+#
+# @closed: The port is unused.
+#
+# @unbound: The port is allocated and ready to be bound.
+#
+# @interdomain: The port is connected as an interdomain interrupt.
+#
+# @pirq: The port is bound to a physical IRQ (PIRQ).
+#
+# @virq: The port is bound to a virtual IRQ (VIRQ).
+#
+# @ipi: The post is an inter-processor interrupt (IPI).
+#
+# Since: 8.0
+##
+{ 'enum': 'EvtchnPortType',
+  'data': ['closed', 'unbound', 'interdomain', 'pirq', 'virq', 'ipi'],
+  'if': 'TARGET_I386' }
+
+##
+# @EvtchnInfo:
+#
+# Information about a Xen event channel port
+#
+# @port: the port number
+#
+# @vcpu: target vCPU for this port
+#
+# @type: the port type
+#
+# @remote-domain: remote domain for interdomain ports
+#
+# @target: remote port ID, or virq/pirq number
+#
+# @pending: port is currently active pending delivery
+#
+# @masked: port is masked
+#
+# Since: 8.0
+##
+{ 'struct': 'EvtchnInfo',
+  'data': {'port': 'uint16',
+           'vcpu': 'uint32',
+           'type': 'EvtchnPortType',
+           'remote-domain': 'str',
+           'target': 'uint16',
+           'pending': 'bool',
+           'masked': 'bool'},
+  'if': 'TARGET_I386' }
+
+
+##
+# @xen-event-list:
+#
+# Query the Xen event channels opened by the guest.
+#
+# Returns: list of open event channel ports.
+#
+# Since: 8.0
+#
+# Example:
+#
+# -> { "execute": "xen-event-list" }
+# <- { "return": [
+#         {
+#             "pending": false,
+#             "port": 1,
+#             "vcpu": 1,
+#             "remote-domain": "qemu",
+#             "masked": false,
+#             "type": "interdomain",
+#             "target": 1
+#         },
+#         {
+#             "pending": false,
+#             "port": 2,
+#             "vcpu": 0,
+#             "remote-domain": "",
+#             "masked": false,
+#             "type": "virq",
+#             "target": 0
+#         }
+#      ]
+#    }
+#
+##
+{ 'command': 'xen-event-list',
+  'returns': ['EvtchnInfo'],
+  'if': 'TARGET_I386' }
+
+##
+# @xen-event-inject:
+#
+# Inject a Xen event channel port (interrupt) to the guest.
+#
+# @port: The port number
+#
+# Returns: - Nothing on success.
+#
+# Since: 8.0
+#
+# Example:
+#
+# -> { "execute": "xen-event-inject", "arguments": { "port": 1 } }
+# <- { "return": { } }
+#
+##
+{ 'command': 'xen-event-inject',
+  'data': { 'port': 'uint32' },
+  'if': 'TARGET_I386' }