@@ -7175,6 +7175,9 @@ if test "$vhost_crypto" = "yes" ; then
fi
if test "$vhost_vsock" = "yes" ; then
echo "CONFIG_VHOST_VSOCK=y" >> $config_host_mak
+ if test "$vhost_user" = "yes" ; then
+ echo "CONFIG_VHOST_USER_VSOCK=y" >> $config_host_mak
+ fi
fi
if test "$vhost_kernel" = "yes" ; then
echo "CONFIG_VHOST_KERNEL=y" >> $config_host_mak
new file mode 100644
@@ -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 */
new file mode 100644
@@ -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[] = {
+ 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 = 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 = VHOST_USER_VSOCK(dev->vdev);
+ int ret = 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 = {
+ .vhost_dev_config_notifier = vuv_handle_config_change,
+};
+
+static void vuv_set_status(VirtIODevice *vdev, uint8_t status)
+{
+ VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev);
+ bool should_start = status & VIRTIO_CONFIG_S_DRIVER_OK;
+
+ if (!vdev->vm_running) {
+ should_start = false;
+ }
+
+ if (vvc->vhost_dev.started == should_start) {
+ return;
+ }
+
+ if (should_start) {
+ int ret = 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 = VHOST_VSOCK_COMMON(vdev);
+
+ return vhost_get_features(&vvc->vhost_dev, user_feature_bits, features);
+}
+
+static const VMStateDescription vuv_vmstate = {
+ .name = "vhost-user-vsock",
+ .minimum_version_id = VHOST_VSOCK_SAVEVM_VERSION,
+ .version_id = VHOST_VSOCK_SAVEVM_VERSION,
+ .fields = (VMStateField[]) {
+ VMSTATE_VIRTIO_DEVICE,
+ VMSTATE_END_OF_LIST()
+ },
+ .pre_save = vhost_vsock_common_pre_save,
+ .post_load = vhost_vsock_common_post_load,
+};
+
+static void vuv_device_realize(DeviceState *dev, Error **errp)
+{
+ VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(dev);
+ VirtIODevice *vdev = VIRTIO_DEVICE(dev);
+ VHostUserVSock *vsock = 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 = 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 = vhost_dev_get_config(&vvc->vhost_dev, (uint8_t *)&vsock->vsockcfg,
+ 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 = VHOST_VSOCK_COMMON(dev);
+ VirtIODevice *vdev = VIRTIO_DEVICE(dev);
+ VHostUserVSock *vsock = 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[] = {
+ DEFINE_PROP_CHR("chardev", VHostUserVSock, conf.chardev),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void vuv_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
+
+ device_class_set_props(dc, vuv_properties);
+ dc->vmsd = &vuv_vmstate;
+ vdc->realize = vuv_device_realize;
+ vdc->unrealize = vuv_device_unrealize;
+ vdc->get_features = vuv_get_features;
+ vdc->get_config = vuv_get_config;
+ vdc->set_status = vuv_set_status;
+}
+
+static const TypeInfo vuv_info = {
+ .name = TYPE_VHOST_USER_VSOCK,
+ .parent = TYPE_VHOST_VSOCK_COMMON,
+ .instance_size = sizeof(VHostUserVSock),
+ .class_init = vuv_class_init,
+};
+
+static void vuv_register_types(void)
+{
+ type_register_static(&vuv_info);
+}
+
+type_init(vuv_register_types)
@@ -18,6 +18,7 @@ common-obj-$(call land,$(CONFIG_VIRTIO_PMEM),$(CONFIG_VIRTIO_PCI)) += virtio-pme
obj-$(call land,$(CONFIG_VHOST_USER_FS),$(CONFIG_VIRTIO_PCI)) += vhost-user-fs-pci.o
obj-$(CONFIG_VIRTIO_IOMMU) += virtio-iommu.o
obj-$(CONFIG_VHOST_VSOCK) += vhost-vsock-common.o vhost-vsock.o
+obj-$(CONFIG_VHOST_USER_VSOCK) += vhost-vsock-common.o vhost-user-vsock.o
ifeq ($(CONFIG_VIRTIO_PCI),y)
obj-$(CONFIG_VHOST_VSOCK) += vhost-vsock-pci.o
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 <sgarzare@redhat.com> --- 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