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[PATCH v2 06/23] qapi: Convert simple union MemoryDeviceInfo to flat one
From: |
Markus Armbruster |
Subject: |
[PATCH v2 06/23] qapi: Convert simple union MemoryDeviceInfo to flat one |
Date: |
Fri, 17 Sep 2021 16:31:17 +0200 |
Simple unions predate flat unions. Having both complicates the QAPI
schema language and the QAPI generator. We haven't been using simple
unions in new code for a long time, because they are less flexible and
somewhat awkward on the wire.
To prepare for their removal, convert simple union MemoryDeviceInfo to
an equivalent flat one. Adds some boilerplate to the schema, which is
a bit ugly, but a lot easier to maintain than the simple union
feature.
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
qapi/machine.json | 42 ++++++++++++++++++++++++++++++++++++++----
1 file changed, 38 insertions(+), 4 deletions(-)
diff --git a/qapi/machine.json b/qapi/machine.json
index 157712f006..32d47f4e35 100644
--- a/qapi/machine.json
+++ b/qapi/machine.json
@@ -1194,6 +1194,38 @@
}
}
+##
+# @MemoryDeviceInfoKind:
+#
+# Since: 2.1
+##
+{ 'enum': 'MemoryDeviceInfoKind',
+ 'data': [ 'dimm', 'nvdimm', 'virtio-pmem', 'virtio-mem' ] }
+
+##
+# @PCDIMMDeviceInfoWrapper:
+#
+# Since: 2.1
+##
+{ 'struct': 'PCDIMMDeviceInfoWrapper',
+ 'data': { 'data': 'PCDIMMDeviceInfo' } }
+
+##
+# @VirtioPMEMDeviceInfoWrapper:
+#
+# Since: 2.1
+##
+{ 'struct': 'VirtioPMEMDeviceInfoWrapper',
+ 'data': { 'data': 'VirtioPMEMDeviceInfo' } }
+
+##
+# @VirtioMEMDeviceInfoWrapper:
+#
+# Since: 2.1
+##
+{ 'struct': 'VirtioMEMDeviceInfoWrapper',
+ 'data': { 'data': 'VirtioMEMDeviceInfo' } }
+
##
# @MemoryDeviceInfo:
#
@@ -1205,10 +1237,12 @@
# Since: 2.1
##
{ 'union': 'MemoryDeviceInfo',
- 'data': { 'dimm': 'PCDIMMDeviceInfo',
- 'nvdimm': 'PCDIMMDeviceInfo',
- 'virtio-pmem': 'VirtioPMEMDeviceInfo',
- 'virtio-mem': 'VirtioMEMDeviceInfo'
+ 'base': { 'type': 'MemoryDeviceInfoKind' },
+ 'discriminator': 'type',
+ 'data': { 'dimm': 'PCDIMMDeviceInfoWrapper',
+ 'nvdimm': 'PCDIMMDeviceInfoWrapper',
+ 'virtio-pmem': 'VirtioPMEMDeviceInfoWrapper',
+ 'virtio-mem': 'VirtioMEMDeviceInfoWrapper'
}
}
--
2.31.1
- [PATCH v2 00/23] qapi: Remove simple unions from the schema language, Markus Armbruster, 2021/09/17
- [PATCH v2 09/23] qapi: Convert simple union ImageInfoSpecific to flat one, Markus Armbruster, 2021/09/17
- [PATCH v2 01/23] qapi: Tidy up unusual line breaks, Markus Armbruster, 2021/09/17
- [PATCH v2 06/23] qapi: Convert simple union MemoryDeviceInfo to flat one,
Markus Armbruster <=
- [PATCH v2 16/23] tests/qapi-schema: Simple union UserDefListUnion is now unused, drop, Markus Armbruster, 2021/09/17
- [PATCH v2 15/23] tests/qapi-schema: Wean off UserDefListUnion, Markus Armbruster, 2021/09/17
- [PATCH v2 05/23] qapi: Convert simple union TpmTypeOptions to flat one, Markus Armbruster, 2021/09/17
- [PATCH v2 03/23] qapi: Convert simple union KeyValue to flat one, Markus Armbruster, 2021/09/17
- [PATCH v2 11/23] tests/qapi-schema: Prepare for simple union UserDefListUnion removal, Markus Armbruster, 2021/09/17
- [PATCH v2 07/23] qapi: Convert simple union ChardevBackend to flat one, Markus Armbruster, 2021/09/17
- [PATCH v2 19/23] tests/qapi-schema: Drop simple union __org.qemu_x-Union1, Markus Armbruster, 2021/09/17
- [PATCH v2 23/23] test-clone-visitor: Correct an accidental rename, Markus Armbruster, 2021/09/17