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Mon, 01 Sep 2025 03:59:57 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Alex=20Benn=C3=A9e?= , Stefano Garzarella , Manos Pitsidianakis , Stefan Hajnoczi , "Michael S. Tsirkin" , Paolo Bonzini Subject: [PATCH v2] hw/virtio: rename vhost-user-device and make user creatable Date: Mon, 1 Sep 2025 11:59:48 +0100 Message-ID: <20250901105948.982583-1-alex.bennee@linaro.org> X-Mailer: git-send-email 2.47.2 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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=2a00:1450:4864:20::32f; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x32f.google.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, 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 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 @linaro.org) X-ZM-MESSAGEID: 1756724504753124100 We didn't make the device user creatable in the first place because we were worried users might get confused. Rename the device to make its nature as a test device even more explicit. While we are at it add a Kconfig variable so it can be skipped for those that want to thin out their build configuration even further. Acked-by: Stefano Garzarella Reviewed-by: Manos Pitsidianakis Reviewed-by: Stefan Hajnoczi Signed-off-by: Alex Benn=C3=A9e Message-ID: <20250820195632.1956795-1-alex.bennee@linaro.org> --- v1 - add review tags, ready to merge v2 - keep the -base name on TYPE_VHOST_USER_TEST_DEVICE_PCI --- docs/system/devices/vhost-user.rst | 20 +++++++------------ include/hw/virtio/vhost-user-base.h | 2 +- ...ice-pci.c =3D> vhost-user-test-device-pci.c} | 17 +++++++--------- ...user-device.c =3D> vhost-user-test-device.c} | 9 +++------ hw/virtio/Kconfig | 5 +++++ hw/virtio/meson.build | 5 +++-- 6 files changed, 26 insertions(+), 32 deletions(-) rename hw/virtio/{vhost-user-device-pci.c =3D> vhost-user-test-device-pci.= c} (77%) rename hw/virtio/{vhost-user-device.c =3D> vhost-user-test-device.c} (87%) diff --git a/docs/system/devices/vhost-user.rst b/docs/system/devices/vhost= -user.rst index 35259d8ec7c..bddf8df5ed5 100644 --- a/docs/system/devices/vhost-user.rst +++ b/docs/system/devices/vhost-user.rst @@ -62,26 +62,20 @@ platform details for what sort of virtio bus to use. The referenced *daemons* are not exhaustive, any conforming backend implementing the device and using the vhost-user protocol should work. =20 -vhost-user-device -^^^^^^^^^^^^^^^^^ +vhost-user-test-device +^^^^^^^^^^^^^^^^^^^^^^ =20 -The vhost-user-device is a generic development device intended for -expert use while developing new backends. The user needs to specify -all the required parameters including: +The vhost-user-test-device is a generic development device intended +for expert use while developing new backends. The user needs to +specify all the required parameters including: =20 - Device ``virtio-id`` - The ``num_vqs`` it needs and their ``vq_size`` - The ``config_size`` if needed =20 .. note:: - To prevent user confusion you cannot currently instantiate - vhost-user-device without first patching out:: - - /* Reason: stop inexperienced users confusing themselves */ - dc->user_creatable =3D false; - - in ``vhost-user-device.c`` and ``vhost-user-device-pci.c`` file and - rebuilding. + While this is a useful device for development it is not recommended + for production use. =20 vhost-user daemon =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D diff --git a/include/hw/virtio/vhost-user-base.h b/include/hw/virtio/vhost-= user-base.h index 51d0968b893..387e434b804 100644 --- a/include/hw/virtio/vhost-user-base.h +++ b/include/hw/virtio/vhost-user-base.h @@ -44,6 +44,6 @@ struct VHostUserBaseClass { }; =20 =20 -#define TYPE_VHOST_USER_DEVICE "vhost-user-device" +#define TYPE_VHOST_USER_TEST_DEVICE "vhost-user-test-device" =20 #endif /* QEMU_VHOST_USER_BASE_H */ diff --git a/hw/virtio/vhost-user-device-pci.c b/hw/virtio/vhost-user-test-= device-pci.c similarity index 77% rename from hw/virtio/vhost-user-device-pci.c rename to hw/virtio/vhost-user-test-device-pci.c index f10bac874e7..b4ed0efb50f 100644 --- a/hw/virtio/vhost-user-device-pci.c +++ b/hw/virtio/vhost-user-test-device-pci.c @@ -18,13 +18,13 @@ struct VHostUserDevicePCI { VHostUserBase vub; }; =20 -#define TYPE_VHOST_USER_DEVICE_PCI "vhost-user-device-pci-base" +#define TYPE_VHOST_USER_TEST_DEVICE_PCI "vhost-user-test-device-pci-base" =20 -OBJECT_DECLARE_SIMPLE_TYPE(VHostUserDevicePCI, VHOST_USER_DEVICE_PCI) +OBJECT_DECLARE_SIMPLE_TYPE(VHostUserDevicePCI, VHOST_USER_TEST_DEVICE_PCI) =20 static void vhost_user_device_pci_realize(VirtIOPCIProxy *vpci_dev, Error = **errp) { - VHostUserDevicePCI *dev =3D VHOST_USER_DEVICE_PCI(vpci_dev); + VHostUserDevicePCI *dev =3D VHOST_USER_TEST_DEVICE_PCI(vpci_dev); DeviceState *vdev =3D DEVICE(&dev->vub); =20 vpci_dev->nvectors =3D 1; @@ -38,9 +38,6 @@ static void vhost_user_device_pci_class_init(ObjectClass = *klass, VirtioPCIClass *k =3D VIRTIO_PCI_CLASS(klass); PCIDeviceClass *pcidev_k =3D PCI_DEVICE_CLASS(klass); =20 - /* Reason: stop users confusing themselves */ - dc->user_creatable =3D false; - k->realize =3D vhost_user_device_pci_realize; set_bit(DEVICE_CATEGORY_INPUT, dc->categories); pcidev_k->vendor_id =3D PCI_VENDOR_ID_REDHAT_QUMRANET; @@ -51,15 +48,15 @@ static void vhost_user_device_pci_class_init(ObjectClas= s *klass, =20 static void vhost_user_device_pci_instance_init(Object *obj) { - VHostUserDevicePCI *dev =3D VHOST_USER_DEVICE_PCI(obj); + VHostUserDevicePCI *dev =3D VHOST_USER_TEST_DEVICE_PCI(obj); =20 virtio_instance_init_common(obj, &dev->vub, sizeof(dev->vub), - TYPE_VHOST_USER_DEVICE); + TYPE_VHOST_USER_TEST_DEVICE); } =20 static const VirtioPCIDeviceTypeInfo vhost_user_device_pci_info =3D { - .base_name =3D TYPE_VHOST_USER_DEVICE_PCI, - .non_transitional_name =3D "vhost-user-device-pci", + .base_name =3D TYPE_VHOST_USER_TEST_DEVICE_PCI, + .non_transitional_name =3D "vhost-user-test-device-pci", .instance_size =3D sizeof(VHostUserDevicePCI), .instance_init =3D vhost_user_device_pci_instance_init, .class_init =3D vhost_user_device_pci_class_init, diff --git a/hw/virtio/vhost-user-device.c b/hw/virtio/vhost-user-test-devi= ce.c similarity index 87% rename from hw/virtio/vhost-user-device.c rename to hw/virtio/vhost-user-test-device.c index 3939bdf7552..1b98ea3e488 100644 --- a/hw/virtio/vhost-user-device.c +++ b/hw/virtio/vhost-user-test-device.c @@ -1,5 +1,5 @@ /* - * Generic vhost-user-device implementation for any vhost-user-backend + * Generic vhost-user-test-device implementation for any vhost-user-backend * * This is a concrete implementation of vhost-user-base which can be * configured via properties. It is useful for development and @@ -25,7 +25,7 @@ */ =20 static const VMStateDescription vud_vmstate =3D { - .name =3D "vhost-user-device", + .name =3D "vhost-user-test-device", .unmigratable =3D 1, }; =20 @@ -41,16 +41,13 @@ static void vud_class_init(ObjectClass *klass, const vo= id *data) { DeviceClass *dc =3D DEVICE_CLASS(klass); =20 - /* Reason: stop inexperienced users confusing themselves */ - dc->user_creatable =3D false; - device_class_set_props(dc, vud_properties); dc->vmsd =3D &vud_vmstate; set_bit(DEVICE_CATEGORY_INPUT, dc->categories); } =20 static const TypeInfo vud_info =3D { - .name =3D TYPE_VHOST_USER_DEVICE, + .name =3D TYPE_VHOST_USER_TEST_DEVICE, .parent =3D TYPE_VHOST_USER_BASE, .class_init =3D vud_class_init, }; diff --git a/hw/virtio/Kconfig b/hw/virtio/Kconfig index 7648a2d68da..10f5c53ac09 100644 --- a/hw/virtio/Kconfig +++ b/hw/virtio/Kconfig @@ -126,3 +126,8 @@ config VHOST_USER_SCMI bool default y depends on VIRTIO && VHOST_USER && ARM + +config VHOST_USER_TEST + bool + default y + depends on VIRTIO && VHOST_USER diff --git a/hw/virtio/meson.build b/hw/virtio/meson.build index 3ea7b3cec83..48b9fedfa56 100644 --- a/hw/virtio/meson.build +++ b/hw/virtio/meson.build @@ -22,7 +22,7 @@ if have_vhost system_virtio_ss.add(files('vhost-user-base.c')) =20 # MMIO Stubs - system_virtio_ss.add(files('vhost-user-device.c')) + system_virtio_ss.add(when: 'CONFIG_VHOST_USER_TEST', if_true: files('v= host-user-test-device.c')) system_virtio_ss.add(when: 'CONFIG_VHOST_USER_GPIO', if_true: files('v= host-user-gpio.c')) system_virtio_ss.add(when: 'CONFIG_VHOST_USER_I2C', if_true: files('vh= ost-user-i2c.c')) system_virtio_ss.add(when: 'CONFIG_VHOST_USER_RNG', if_true: files('vh= ost-user-rng.c')) @@ -30,7 +30,8 @@ if have_vhost system_virtio_ss.add(when: 'CONFIG_VHOST_USER_INPUT', if_true: files('= vhost-user-input.c')) =20 # PCI Stubs - system_virtio_ss.add(when: 'CONFIG_VIRTIO_PCI', if_true: files('vhost-= user-device-pci.c')) + system_virtio_ss.add(when: ['CONFIG_VIRTIO_PCI', 'CONFIG_VHOST_USER_TE= ST'], + if_true: files('vhost-user-test-device-pci.c')) system_virtio_ss.add(when: ['CONFIG_VIRTIO_PCI', 'CONFIG_VHOST_USER_GP= IO'], if_true: files('vhost-user-gpio-pci.c')) system_virtio_ss.add(when: ['CONFIG_VIRTIO_PCI', 'CONFIG_VHOST_USER_I2= C'], --=20 2.47.2