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Tsirkin" , Harpreet Singh Anand Subject: [RFC 2/8] vdpa: Extract get_backend_features from vhost_vdpa_get_as_num Date: Wed, 10 Aug 2022 20:42:14 +0200 Message-Id: <20220810184220.2362292-3-eperezma@redhat.com> In-Reply-To: <20220810184220.2362292-1-eperezma@redhat.com> References: <20220810184220.2362292-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.85 on 10.11.54.8 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=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1660157236353100003 The series reuses it to check for SUSPEND feature bit. Signed-off-by: Eugenio P=C3=A9rez --- net/vhost-vdpa.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 11241ebac4..85b10799bd 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -602,9 +602,17 @@ static const VhostShadowVirtqueueOps vhost_vdpa_net_sv= q_ops =3D { .avail_handler =3D vhost_vdpa_net_handle_ctrl_avail, }; =20 -static uint32_t vhost_vdpa_get_as_num(int vdpa_device_fd) +static uint64_t vhost_vdpa_get_backend_features(int fd) { uint64_t features; + + /* No need to treat the error, only to know there is one */ + int ret =3D ioctl(fd, VHOST_GET_BACKEND_FEATURES, &features); + return ret < 0 ? 0 : features; +} + +static uint32_t vhost_vdpa_get_as_num(int vdpa_device_fd, uint64_t feature= s) +{ unsigned num_as; int r; =20 @@ -733,7 +741,7 @@ int net_init_vhost_vdpa(const Netdev *netdev, const cha= r *name, NetClientState *peer, Error **errp) { const NetdevVhostVDPAOptions *opts; - uint64_t features; + uint64_t features, backend_features; int vdpa_device_fd; g_autofree NetClientState **ncs =3D NULL; g_autoptr(VhostIOVATree) iova_tree =3D NULL; @@ -765,9 +773,10 @@ int net_init_vhost_vdpa(const Netdev *netdev, const ch= ar *name, goto err; } =20 + backend_features =3D vhost_vdpa_get_backend_features(vdpa_device_fd); svq_cvq =3D opts->x_svq; if (has_cvq && !opts->x_svq) { - num_as =3D vhost_vdpa_get_as_num(vdpa_device_fd); + num_as =3D vhost_vdpa_get_as_num(vdpa_device_fd, backend_features); svq_cvq =3D num_as > 1; } =20 --=20 2.31.1