qapi: Make some ObjectTypes depend on the build settings

Some of the ObjectType entries already depend on CONFIG_* switches.
Some others also only make sense with certain configurations, but
are currently always listed in the ObjectType enum. Let's make them
depend on the correpsonding CONFIG_* switches, too, so that upper
layers (like libvirt) have a better way to determine which features
are available in QEMU.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20210928160232.432980-1-thuth@redhat.com>
[Do the same for MemoryBackendEpcProperties. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

qapi/qom.json

@@ -794,7 +794,8 @@
     'authz-pam',
     'authz-simple',
     'can-bus',
-    'can-host-socketcan',
+    { 'name': 'can-host-socketcan',
+      'if': 'CONFIG_LINUX' },
     'colo-compare',
     'cryptodev-backend',
     'cryptodev-backend-builtin',
@@ -808,21 +809,26 @@
     'filter-replay',
     'filter-rewriter',
     'input-barrier',
-    'input-linux',
+    { 'name': 'input-linux',
+      'if': 'CONFIG_LINUX' },
     'iothread',
+    { 'name': 'memory-backend-epc',
+      'if': 'CONFIG_LINUX' },
     'memory-backend-file',
     { 'name': 'memory-backend-memfd',
       'if': 'CONFIG_LINUX' },
     'memory-backend-ram',
-    'memory-backend-epc',
     'pef-guest',
-    'pr-manager-helper',
+    { 'name': 'pr-manager-helper',
+      'if': 'CONFIG_LINUX' },
     'qtest',
     'rng-builtin',
     'rng-egd',
-    'rng-random',
+    { 'name': 'rng-random',
+      'if': 'CONFIG_POSIX' },
     'secret',
-    'secret_keyring',
+    { 'name': 'secret_keyring',
+      'if': 'CONFIG_SECRET_KEYRING' },
     'sev-guest',
     's390-pv-guest',
     'throttle-group',
@@ -853,7 +859,8 @@
       'authz-listfile':             'AuthZListFileProperties',
       'authz-pam':                  'AuthZPAMProperties',
       'authz-simple':               'AuthZSimpleProperties',
-      'can-host-socketcan':         'CanHostSocketcanProperties',
+      'can-host-socketcan':         { 'type': 'CanHostSocketcanProperties',
+                                      'if': 'CONFIG_LINUX' },
       'colo-compare':               'ColoCompareProperties',
       'cryptodev-backend':          'CryptodevBackendProperties',
       'cryptodev-backend-builtin':  'CryptodevBackendProperties',
@@ -867,20 +874,25 @@
       'filter-replay':              'NetfilterProperties',
       'filter-rewriter':            'FilterRewriterProperties',
       'input-barrier':              'InputBarrierProperties',
-      'input-linux':                'InputLinuxProperties',
+      'input-linux':                { 'type': 'InputLinuxProperties',
+                                      'if': 'CONFIG_LINUX' },
       'iothread':                   'IothreadProperties',
+      'memory-backend-epc':         { 'type': 'MemoryBackendEpcProperties',
+                                      'if': 'CONFIG_LINUX' },
       'memory-backend-file':        'MemoryBackendFileProperties',
       'memory-backend-memfd':       { 'type': 'MemoryBackendMemfdProperties',
                                       'if': 'CONFIG_LINUX' },
       'memory-backend-ram':         'MemoryBackendProperties',
-      'memory-backend-epc':         'MemoryBackendEpcProperties',
-      'pr-manager-helper':          'PrManagerHelperProperties',
+      'pr-manager-helper':          { 'type': 'PrManagerHelperProperties',
+                                      'if': 'CONFIG_LINUX' },
       'qtest':                      'QtestProperties',
       'rng-builtin':                'RngProperties',
       'rng-egd':                    'RngEgdProperties',
-      'rng-random':                 'RngRandomProperties',
+      'rng-random':                 { 'type': 'RngRandomProperties',
+                                      'if': 'CONFIG_POSIX' },
       'secret':                     'SecretProperties',
-      'secret_keyring':             'SecretKeyringProperties',
+      'secret_keyring':             { 'type': 'SecretKeyringProperties',
+                                      'if': 'CONFIG_SECRET_KEYRING' },
       'sev-guest':                  'SevGuestProperties',
       'throttle-group':             'ThrottleGroupProperties',
       'tls-creds-anon':             'TlsCredsAnonProperties',