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authorLaszlo Ersek <lersek@redhat.com>2017-03-20 18:05:57 +0100
committerMichael S. Tsirkin <mst@redhat.com>2017-03-22 18:29:27 +0200
commitf92063028a0ea9e15d8f962644bce76c0e8aa7d1 (patch)
treeaa6351da0d31306379373403493ee34065c05391 /hw/acpi
parentf2a1ae45d8ec5ad494e66a9234499a2e0fbf4b40 (diff)
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hw/acpi/vmgenid: prevent more than one vmgenid device
A system with multiple VMGENID devices is undefined in the VMGENID spec by omission. Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Ben Warren <ben@skyportsystems.com> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Diffstat (limited to 'hw/acpi')
-rw-r--r--hw/acpi/vmgenid.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/hw/acpi/vmgenid.c b/hw/acpi/vmgenid.c
index c3ddcc8..a32b847 100644
--- a/hw/acpi/vmgenid.c
+++ b/hw/acpi/vmgenid.c
@@ -221,6 +221,14 @@ static void vmgenid_realize(DeviceState *dev, Error **errp)
return;
}
+ /* Given that this function is executing, there is at least one VMGENID
+ * device. Check if there are several.
+ */
+ if (!find_vmgenid_dev()) {
+ error_setg(errp, "at most one %s device is permitted", VMGENID_DEVICE);
+ return;
+ }
+
qemu_register_reset(vmgenid_handle_reset, vms);
}