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Tsirkin" , Peter Xu , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Eduardo Habkost , Marcel Apfelbaum , Yanan Wang , Michal Privoznik , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Gavin Shan , Alex Williamson , Stefan Hajnoczi , "Maciej S . Szmigiero" , kvm@vger.kernel.org Subject: [PATCH v2 11/16] vhost: Add vhost_get_max_memslots() Date: Fri, 25 Aug 2023 15:21:44 +0200 Message-ID: <20230825132149.366064-12-david@redhat.com> In-Reply-To: <20230825132149.366064-1-david@redhat.com> References: <20230825132149.366064-1-david@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 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=david@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=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: 1692969844164100005 Content-Type: text/plain; charset="utf-8" Let's add vhost_get_max_memslots(), to perform a similar task as kvm_get_max_memslots(). Signed-off-by: David Hildenbrand --- hw/virtio/vhost-stub.c | 5 +++++ hw/virtio/vhost.c | 11 +++++++++++ include/hw/virtio/vhost.h | 1 + 3 files changed, 17 insertions(+) diff --git a/hw/virtio/vhost-stub.c b/hw/virtio/vhost-stub.c index d53dd9d288..52d42adab2 100644 --- a/hw/virtio/vhost-stub.c +++ b/hw/virtio/vhost-stub.c @@ -2,6 +2,11 @@ #include "hw/virtio/vhost.h" #include "hw/virtio/vhost-user.h" =20 +unsigned int vhost_get_max_memslots(void) +{ + return UINT_MAX; +} + unsigned int vhost_get_free_memslots(void) { return UINT_MAX; diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index f7e1ac12a8..ee193b07c7 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -55,6 +55,17 @@ static unsigned int used_shared_memslots; static QLIST_HEAD(, vhost_dev) vhost_devices =3D QLIST_HEAD_INITIALIZER(vhost_devices); =20 +unsigned int vhost_get_max_memslots(void) +{ + unsigned int max =3D UINT_MAX; + struct vhost_dev *hdev; + + QLIST_FOREACH(hdev, &vhost_devices, entry) { + max =3D MIN(max, hdev->vhost_ops->vhost_backend_memslots_limit(hde= v)); + } + return max; +} + unsigned int vhost_get_free_memslots(void) { unsigned int free =3D UINT_MAX; diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index 603bf834be..c7e5467693 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -315,6 +315,7 @@ uint64_t vhost_get_features(struct vhost_dev *hdev, con= st int *feature_bits, */ void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits, uint64_t features); +unsigned int vhost_get_max_memslots(void); unsigned int vhost_get_free_memslots(void); =20 int vhost_net_set_backend(struct vhost_dev *hdev, --=20 2.41.0