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Fri, 15 May 2020 08:21:14 -0700 (PDT) From: Stefano Garzarella To: qemu-devel@nongnu.org Subject: [PATCH 2/3] virtio: add vhost-user-vsock base device Date: Fri, 15 May 2020 17:21:09 +0200 Message-Id: <20200515152110.202917-3-sgarzare@redhat.com> X-Mailer: git-send-email 2.25.4 In-Reply-To: <20200515152110.202917-1-sgarzare@redhat.com> References: <20200515152110.202917-1-sgarzare@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com 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=207.211.31.81; envelope-from=sgarzare@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/15 00:39:12 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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_H2=-0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Julio Montes , Sebastien Boeuf , Stefan Hajnoczi , "Michael S. Tsirkin" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" This patch introduces a vhost-user device for vsock, using the vhost-vsock-common parent class. The vhost-user-vsock device can be used to implement the virtio-vsock device emulation in user-space. Signed-off-by: Stefano Garzarella --- configure | 3 + include/hw/virtio/vhost-user-vsock.h | 36 +++++ hw/virtio/vhost-user-vsock.c | 188 +++++++++++++++++++++++++++ hw/virtio/Makefile.objs | 1 + 4 files changed, 228 insertions(+) create mode 100644 include/hw/virtio/vhost-user-vsock.h create mode 100644 hw/virtio/vhost-user-vsock.c diff --git a/configure b/configure index 26084fc53a..367d474e89 100755 --- a/configure +++ b/configure @@ -7175,6 +7175,9 @@ if test "$vhost_crypto" =3D "yes" ; then fi if test "$vhost_vsock" =3D "yes" ; then echo "CONFIG_VHOST_VSOCK=3Dy" >> $config_host_mak + if test "$vhost_user" =3D "yes" ; then + echo "CONFIG_VHOST_USER_VSOCK=3Dy" >> $config_host_mak + fi fi if test "$vhost_kernel" =3D "yes" ; then echo "CONFIG_VHOST_KERNEL=3Dy" >> $config_host_mak diff --git a/include/hw/virtio/vhost-user-vsock.h b/include/hw/virtio/vhost= -user-vsock.h new file mode 100644 index 0000000000..4e128a4b9f --- /dev/null +++ b/include/hw/virtio/vhost-user-vsock.h @@ -0,0 +1,36 @@ +/* + * Vhost-user vsock virtio device + * + * Copyright 2020 Red Hat, Inc. + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * (at your option) any later version. See the COPYING file in the + * top-level directory. + */ + +#ifndef _QEMU_VHOST_USER_VSOCK_H +#define _QEMU_VHOST_USER_VSOCK_H + +#include "hw/virtio/vhost-vsock-common.h" +#include "hw/virtio/vhost-user.h" +#include "standard-headers/linux/virtio_vsock.h" + +#define TYPE_VHOST_USER_VSOCK "vhost-user-vsock-device" +#define VHOST_USER_VSOCK(obj) \ + OBJECT_CHECK(VHostUserVSock, (obj), TYPE_VHOST_USER_VSOCK) + +typedef struct { + CharBackend chardev; +} VHostUserVSockConf; + +typedef struct { + /*< private >*/ + VHostVSockCommon parent; + VhostUserState vhost_user; + VHostUserVSockConf conf; + struct virtio_vsock_config vsockcfg; + + /*< public >*/ +} VHostUserVSock; + +#endif /* _QEMU_VHOST_USER_VSOCK_H */ diff --git a/hw/virtio/vhost-user-vsock.c b/hw/virtio/vhost-user-vsock.c new file mode 100644 index 0000000000..a401204b7d --- /dev/null +++ b/hw/virtio/vhost-user-vsock.c @@ -0,0 +1,188 @@ +/* + * Vhost-user vsock virtio device + * + * Copyright 2020 Red Hat, Inc. + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * (at your option) any later version. See the COPYING file in the + * top-level directory. + */ + +#include "qemu/osdep.h" + +#include "qapi/error.h" +#include "qemu/error-report.h" +#include "hw/qdev-properties.h" +#include "hw/virtio/vhost-user-vsock.h" + +static const int user_feature_bits[] =3D { + VIRTIO_F_VERSION_1, + VIRTIO_RING_F_INDIRECT_DESC, + VIRTIO_RING_F_EVENT_IDX, + VIRTIO_F_NOTIFY_ON_EMPTY, + VHOST_INVALID_FEATURE_BIT +}; + +static void vuv_get_config(VirtIODevice *vdev, uint8_t *config) +{ + VHostUserVSock *vsock =3D VHOST_USER_VSOCK(vdev); + + memcpy(config, &vsock->vsockcfg, sizeof(struct virtio_vsock_config)); +} + +static int vuv_handle_config_change(struct vhost_dev *dev) +{ + VHostUserVSock *vsock =3D VHOST_USER_VSOCK(dev->vdev); + int ret =3D vhost_dev_get_config(dev, (uint8_t *)&vsock->vsockcfg, + sizeof(struct virtio_vsock_config)); + if (ret < 0) { + error_report("get config space failed"); + return -1; + } + + virtio_notify_config(dev->vdev); + + return 0; +} + +const VhostDevConfigOps vsock_ops =3D { + .vhost_dev_config_notifier =3D vuv_handle_config_change, +}; + +static void vuv_set_status(VirtIODevice *vdev, uint8_t status) +{ + VHostVSockCommon *vvc =3D VHOST_VSOCK_COMMON(vdev); + bool should_start =3D status & VIRTIO_CONFIG_S_DRIVER_OK; + + if (!vdev->vm_running) { + should_start =3D false; + } + + if (vvc->vhost_dev.started =3D=3D should_start) { + return; + } + + if (should_start) { + int ret =3D vhost_vsock_common_start(vdev); + if (ret < 0) { + return; + } + } else { + vhost_vsock_common_stop(vdev); + } +} + +static uint64_t vuv_get_features(VirtIODevice *vdev, + uint64_t features, + Error **errp) +{ + VHostVSockCommon *vvc =3D VHOST_VSOCK_COMMON(vdev); + + return vhost_get_features(&vvc->vhost_dev, user_feature_bits, features= ); +} + +static const VMStateDescription vuv_vmstate =3D { + .name =3D "vhost-user-vsock", + .minimum_version_id =3D VHOST_VSOCK_SAVEVM_VERSION, + .version_id =3D VHOST_VSOCK_SAVEVM_VERSION, + .fields =3D (VMStateField[]) { + VMSTATE_VIRTIO_DEVICE, + VMSTATE_END_OF_LIST() + }, + .pre_save =3D vhost_vsock_common_pre_save, + .post_load =3D vhost_vsock_common_post_load, +}; + +static void vuv_device_realize(DeviceState *dev, Error **errp) +{ + VHostVSockCommon *vvc =3D VHOST_VSOCK_COMMON(dev); + VirtIODevice *vdev =3D VIRTIO_DEVICE(dev); + VHostUserVSock *vsock =3D VHOST_USER_VSOCK(dev); + int ret; + + if (!vsock->conf.chardev.chr) { + error_setg(errp, "missing chardev"); + return; + } + + if (!vhost_user_init(&vsock->vhost_user, &vsock->conf.chardev, errp)) { + return; + } + + vhost_vsock_common_realize(vdev, "vhost-user-vsock"); + + vhost_dev_set_config_notifier(&vvc->vhost_dev, &vsock_ops); + + ret =3D vhost_dev_init(&vvc->vhost_dev, &vsock->vhost_user, + VHOST_BACKEND_TYPE_USER, 0); + if (ret < 0) { + error_setg_errno(errp, -ret, "vhost_dev_init failed"); + goto err_virtio; + } + + ret =3D vhost_dev_get_config(&vvc->vhost_dev, (uint8_t *)&vsock->vsock= cfg, + sizeof(struct virtio_vsock_config)); + if (ret < 0) { + error_setg_errno(errp, -ret, "get config space failed"); + goto err_vhost_dev; + } + + return; + +err_vhost_dev: + vhost_dev_cleanup(&vvc->vhost_dev); +err_virtio: + vhost_vsock_common_unrealize(vdev); + vhost_user_cleanup(&vsock->vhost_user); + return; +} + +static void vuv_device_unrealize(DeviceState *dev) +{ + VHostVSockCommon *vvc =3D VHOST_VSOCK_COMMON(dev); + VirtIODevice *vdev =3D VIRTIO_DEVICE(dev); + VHostUserVSock *vsock =3D VHOST_USER_VSOCK(dev); + + /* This will stop vhost backend if appropriate. */ + vuv_set_status(vdev, 0); + + vhost_dev_cleanup(&vvc->vhost_dev); + + vhost_vsock_common_unrealize(vdev); + + vhost_user_cleanup(&vsock->vhost_user); + +} + +static Property vuv_properties[] =3D { + DEFINE_PROP_CHR("chardev", VHostUserVSock, conf.chardev), + DEFINE_PROP_END_OF_LIST(), +}; + +static void vuv_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc =3D DEVICE_CLASS(klass); + VirtioDeviceClass *vdc =3D VIRTIO_DEVICE_CLASS(klass); + + device_class_set_props(dc, vuv_properties); + dc->vmsd =3D &vuv_vmstate; + vdc->realize =3D vuv_device_realize; + vdc->unrealize =3D vuv_device_unrealize; + vdc->get_features =3D vuv_get_features; + vdc->get_config =3D vuv_get_config; + vdc->set_status =3D vuv_set_status; +} + +static const TypeInfo vuv_info =3D { + .name =3D TYPE_VHOST_USER_VSOCK, + .parent =3D TYPE_VHOST_VSOCK_COMMON, + .instance_size =3D sizeof(VHostUserVSock), + .class_init =3D vuv_class_init, +}; + +static void vuv_register_types(void) +{ + type_register_static(&vuv_info); +} + +type_init(vuv_register_types) diff --git a/hw/virtio/Makefile.objs b/hw/virtio/Makefile.objs index b1eeb44eac..dd42daedb1 100644 --- a/hw/virtio/Makefile.objs +++ b/hw/virtio/Makefile.objs @@ -18,6 +18,7 @@ common-obj-$(call land,$(CONFIG_VIRTIO_PMEM),$(CONFIG_VIR= TIO_PCI)) +=3D virtio-pme obj-$(call land,$(CONFIG_VHOST_USER_FS),$(CONFIG_VIRTIO_PCI)) +=3D vhost-u= ser-fs-pci.o obj-$(CONFIG_VIRTIO_IOMMU) +=3D virtio-iommu.o obj-$(CONFIG_VHOST_VSOCK) +=3D vhost-vsock-common.o vhost-vsock.o +obj-$(CONFIG_VHOST_USER_VSOCK) +=3D vhost-vsock-common.o vhost-user-vsock.o =20 ifeq ($(CONFIG_VIRTIO_PCI),y) obj-$(CONFIG_VHOST_VSOCK) +=3D vhost-vsock-pci.o --=20 2.25.4