[Qemu-devel] [PATCH] hw/nvram/spapr_nvram: Device can not be created by the users

[Thomas Huth <thuth@redhat.com>]

Trying to add a spapr-nvram device currently aborts QEMU like this:

$ ppc64-softmmu/qemu-system-ppc64  -device spapr-nvram
qemu-system-ppc64: hw/ppc/spapr_rtas.c:407: spapr_rtas_register:
 Assertion `!rtas_table[token].name' failed.
Aborted (core dumped)

This NVRAM device registers RTAS calls during its realize function
and thus can only be used once - and that's internally from spapr.c.
So let's mark the device with user_creatable = false to avoid that
the users can crash their QEMU this way.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 hw/nvram/spapr_nvram.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/nvram/spapr_nvram.c b/hw/nvram/spapr_nvram.c
index bc355a4..4a0aec8 100644
--- a/hw/nvram/spapr_nvram.c
+++ b/hw/nvram/spapr_nvram.c
@@ -264,6 +264,8 @@ static void spapr_nvram_class_init(ObjectClass *klass, void *data)
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     dc->props = spapr_nvram_properties;
     dc->vmsd = &vmstate_spapr_nvram;
+    /* Reason: Internal device only, uses spapr_rtas_register() in realize() */
+    dc->user_creatable = false;
 }
 
 static const TypeInfo spapr_nvram_type_info = {
-- 
1.8.3.1