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bh=NG+yzLcAuX4z6AnLXT7tTZKW/GTwN0xS26UfaJvCq+Q=; b=N0dkuUzGND0d5PrK6090jWqZCox0DVYDjOHna4SrZg4goQKN2shBbJk9vFbsshlpqBoQw8 f002co7iRhzC72Jp6D/9DR7zOj5pSKJrwPONNSIBybbG3NxnGZotwCbNSiP/7ZUUwOZblG uK0Wk0aWxz6pBrkQSVimLi22RlDEh94= X-MC-Unique: k83WJI3rO9CO1MDuyaPzIw-1 From: Thomas Huth To: qemu-devel@nongnu.org, Christian Borntraeger Cc: qemu-s390x@nongnu.org, Halil Pasic , Eric Farman , David Hildenbrand , Claudio Imbrenda , Juan Quintela Subject: [PATCH v2 1/3] hw/s390x/s390-skeys: Don't call register_savevm_live() during instance_init() Date: Fri, 20 Oct 2023 17:05:52 +0200 Message-ID: <20231020150554.664422-2-thuth@redhat.com> In-Reply-To: <20231020150554.664422-1-thuth@redhat.com> References: <20231020150554.664422-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.6 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1697814444170100003 Content-Type: text/plain; charset="utf-8" Since the instance_init() function immediately tries to set the property to "true", the s390_skeys_set_migration_enabled() tries to register a savevm handler during instance_init(). However, instance_init() functions can be called multiple times, e.g. for introspection of devices. That means multiple instances of devices can be created during runtime (which is fine as long as they all don't get realized, too), so the "Prevent double registration of savevm handler" check in the s390_skeys_set_migration_enabled() function does not work at all as expected (since there could be more than one instance). Thus we must not call register_savevm_live() from an instance_init() function at all. Move this to the realize() function instead. This way we can also get rid of the property getter and setter functions completely, simplifying the code along the way quite a bit. Acked-by: David Hildenbrand Reviewed-by: Eric Farman Signed-off-by: Thomas Huth --- hw/s390x/s390-skeys.c | 35 ++++++++--------------------------- 1 file changed, 8 insertions(+), 27 deletions(-) diff --git a/hw/s390x/s390-skeys.c b/hw/s390x/s390-skeys.c index 5024faf411..8e9d9e41e8 100644 --- a/hw/s390x/s390-skeys.c +++ b/hw/s390x/s390-skeys.c @@ -12,6 +12,7 @@ #include "qemu/osdep.h" #include "qemu/units.h" #include "hw/boards.h" +#include "hw/qdev-properties.h" #include "hw/s390x/storage-keys.h" #include "qapi/error.h" #include "qapi/qapi-commands-misc-target.h" @@ -432,58 +433,38 @@ static int s390_storage_keys_load(QEMUFile *f, void *= opaque, int version_id) return ret; } =20 -static inline bool s390_skeys_get_migration_enabled(Object *obj, Error **e= rrp) -{ - S390SKeysState *ss =3D S390_SKEYS(obj); - - return ss->migration_enabled; -} - static SaveVMHandlers savevm_s390_storage_keys =3D { .save_state =3D s390_storage_keys_save, .load_state =3D s390_storage_keys_load, }; =20 -static inline void s390_skeys_set_migration_enabled(Object *obj, bool valu= e, - Error **errp) +static void s390_skeys_realize(DeviceState *dev, Error **errp) { - S390SKeysState *ss =3D S390_SKEYS(obj); - - /* Prevent double registration of savevm handler */ - if (ss->migration_enabled =3D=3D value) { - return; - } - - ss->migration_enabled =3D value; + S390SKeysState *ss =3D S390_SKEYS(dev); =20 if (ss->migration_enabled) { register_savevm_live(TYPE_S390_SKEYS, 0, 1, &savevm_s390_storage_keys, ss); - } else { - unregister_savevm(VMSTATE_IF(ss), TYPE_S390_SKEYS, ss); } } =20 -static void s390_skeys_instance_init(Object *obj) -{ - object_property_add_bool(obj, "migration-enabled", - s390_skeys_get_migration_enabled, - s390_skeys_set_migration_enabled); - object_property_set_bool(obj, "migration-enabled", true, NULL); -} +static Property s390_skeys_props[] =3D { + DEFINE_PROP_BOOL("migration-enabled", S390SKeysState, migration_enable= d, true), +}; =20 static void s390_skeys_class_init(ObjectClass *oc, void *data) { DeviceClass *dc =3D DEVICE_CLASS(oc); =20 dc->hotpluggable =3D false; + dc->realize =3D s390_skeys_realize; + device_class_set_props(dc, s390_skeys_props); set_bit(DEVICE_CATEGORY_MISC, dc->categories); } =20 static const TypeInfo s390_skeys_info =3D { .name =3D TYPE_S390_SKEYS, .parent =3D TYPE_DEVICE, - .instance_init =3D s390_skeys_instance_init, .instance_size =3D sizeof(S390SKeysState), .class_init =3D s390_skeys_class_init, .class_size =3D sizeof(S390SKeysClass), --=20 2.41.0