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Tsirkin" , Stefano Garzarella , Peter Xu , Fabiano Rosas , Cornelia Huck , Luigi Rizzo , Giuseppe Lettieri , Vincenzo Maffione , Eric Blake , Markus Armbruster Subject: [PATCH RFC 11/16] qdev-properties: add property for extended virtio features Date: Wed, 21 May 2025 13:34:05 +0200 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 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=170.10.133.124; envelope-from=pabeni@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.184, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: 1747827486157116600 Content-Type: text/plain; charset="utf-8" Virtio features extend above the 64 bit space, and GSO over UDP tunnels support is going to use some bits in the extended space. Introduce a new Property type to handle the extended feature defined in the previous patch. Signed-off-by: Paolo Abeni --- hw/core/qdev-properties.c | 46 ++++++++++++++++++++++++++++++++++++ include/hw/qdev-properties.h | 13 ++++++++++ 2 files changed, 59 insertions(+) diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c index 147b3ffd16..2a0182479c 100644 --- a/hw/core/qdev-properties.c +++ b/hw/core/qdev-properties.c @@ -225,6 +225,52 @@ const PropertyInfo qdev_prop_bit64 =3D { .set_default_value =3D set_default_value_bool, }; =20 +/* Bit virtio features __int128_t */ +#ifdef CONFIG_INT128 +static void vf_prop_set(Object *obj, const Property *props, bool val) +{ + __int128_t *vf =3D object_field_prop_ptr(obj, props); + assert(props->info =3D=3D &qdev_prop_bitvf); + if (val) { + *vf |=3D (__int128_t)1 << props->bitnr; + } else { + *vf &=3D ~((__int128_t)1 << props->bitnr); + } +} + +static void prop_get_bitvf(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + const Property *prop =3D opaque; + __int128_t *vf =3D object_field_prop_ptr(obj, prop); + bool value; + + assert(prop->info =3D=3D &qdev_prop_bitvf); + value =3D *vf & ((__int128_t)1 << prop->bitnr); + visit_type_bool(v, name, &value, errp); +} + +static void prop_set_bitvf(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + const Property *prop =3D opaque; + bool value; + + if (!visit_type_bool(v, name, &value, errp)) { + return; + } + vf_prop_set(obj, prop, value); +} + +const PropertyInfo qdev_prop_bitvf =3D { + .type =3D "bool", + .description =3D "on/off", + .get =3D prop_get_bitvf, + .set =3D prop_set_bitvf, + .set_default_value =3D set_default_value_bool, +}; +#endif + /* --- bool --- */ =20 static void get_bool(Object *obj, Visitor *v, const char *name, void *opaq= ue, diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h index 2c99856caa..7760dd6dbd 100644 --- a/include/hw/qdev-properties.h +++ b/include/hw/qdev-properties.h @@ -100,6 +100,19 @@ extern const PropertyInfo qdev_prop_link; .set_default =3D true, \ .defval.u =3D (bool)_defval) =20 +#ifdef CONFIG_INT128 +extern const PropertyInfo qdev_prop_bitvf; + +#define DEFINE_PROP_BITVF(_name, _state, _field, _bit, _defval) \ + DEFINE_PROP(_name, _state, _field, qdev_prop_bitvf, \ + virtio_features_t, \ + .bitnr =3D (_bit), \ + .set_default =3D true, \ + .defval.u =3D (bool)_defval) +#else +#define qdev_prop_bitvf qdev_prop_bit64 +#endif + #define DEFINE_PROP_BOOL(_name, _state, _field, _defval) \ DEFINE_PROP(_name, _state, _field, qdev_prop_bool, bool, \ .set_default =3D true, \ --=20 2.49.0