Rather than creating stubs for every command that just return
QERR_UNSUPPORTED, use 'if' conditions in the QAPI schema to
fully exclude generation of the commands on non-Windows.

The command will be rejected at QMP dispatch time instead,
avoiding reimplementing rejection by blocking the stub commands.

This has the additional benefit that the QGA protocol reference
now documents what conditions enable use of the command.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 qga/commands-posix.c |  9 ---------
 qga/qapi-schema.json | 15 ++++++++++-----
 2 files changed, 10 insertions(+), 14 deletions(-)

diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 838dc3cf98..b7f96aa005 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -1207,8 +1207,6 @@ GList *ga_command_init_blockedrpcs(GList *blockedrpcs)
     blockedrpcs = g_list_append(blockedrpcs, g_strdup("guest-fstrim"));
 #endif
 
-    blockedrpcs = g_list_append(blockedrpcs, g_strdup("guest-get-devices"));
-
     return blockedrpcs;
 }
 
@@ -1419,13 +1417,6 @@ GuestOSInfo *qmp_guest_get_osinfo(Error **errp)
     return info;
 }
 
-GuestDeviceInfoList *qmp_guest_get_devices(Error **errp)
-{
-    error_setg(errp, QERR_UNSUPPORTED);
-
-    return NULL;
-}
-
 #ifndef HOST_NAME_MAX
 # ifdef _POSIX_HOST_NAME_MAX
 #  define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
index 700c5baa5a..2704b814ab 100644
--- a/qga/qapi-schema.json
+++ b/qga/qapi-schema.json
@@ -1527,7 +1527,8 @@
 # @pci: PCI device
 ##
 { 'enum': 'GuestDeviceType',
-  'data': [ 'pci' ] }
+  'data': [ 'pci' ],
+  'if': 'CONFIG_WIN32' }
 
 ##
 # @GuestDeviceIdPCI:
@@ -1539,7 +1540,8 @@
 # Since: 5.2
 ##
 { 'struct': 'GuestDeviceIdPCI',
-  'data': { 'vendor-id': 'uint16', 'device-id': 'uint16' } }
+  'data': { 'vendor-id': 'uint16', 'device-id': 'uint16' },
+  'if': 'CONFIG_WIN32' }
 
 ##
 # @GuestDeviceId:
@@ -1553,7 +1555,8 @@
 { 'union': 'GuestDeviceId',
   'base': { 'type': 'GuestDeviceType' },
   'discriminator': 'type',
-  'data': { 'pci': 'GuestDeviceIdPCI' } }
+  'data': { 'pci': 'GuestDeviceIdPCI' },
+  'if': 'CONFIG_WIN32' }
 
 ##
 # @GuestDeviceInfo:
@@ -1574,7 +1577,8 @@
       '*driver-date': 'int',
       '*driver-version': 'str',
       '*id': 'GuestDeviceId'
-  } }
+  },
+  'if': 'CONFIG_WIN32' }
 
 ##
 # @guest-get-devices:
@@ -1586,7 +1590,8 @@
 # Since: 5.2
 ##
 { 'command': 'guest-get-devices',
-  'returns': ['GuestDeviceInfo'] }
+  'returns': ['GuestDeviceInfo'],
+  'if': 'CONFIG_WIN32' }
 
 ##
 # @GuestAuthorizedKeys:
-- 
2.45.1