qemu/vdpa-dev-get-iova-range-explicitly.patch

From f5d338d28758db5066f199c35d56e0953edcc5d9 Mon Sep 17 00:00:00 2001
From: Longpeng <longpeng2@huawei.com>
Date: Sat, 24 Dec 2022 19:48:47 +0800
Subject: [PATCH] vdpa-dev: get iova range explicitly

In commit a585fad26b ("vdpa: request iova_range only once") we remove
GET_IOVA_RANGE form vhost_vdpa_init, the generic vdpa device will start
without iova_range populated, so the device won't work. Let's call
GET_IOVA_RANGE ioctl explicitly.

Fixes: a585fad26b2e6ccc ("vdpa: request iova_range only once")
Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221224114848.3062-2-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: fangyi <eric.fangyi@huawei.com>
---
 hw/virtio/vdpa-dev.c           | 9 +++++++++
 hw/virtio/vhost-vdpa.c         | 7 +++++++
 include/hw/virtio/vhost-vdpa.h | 2 ++
 net/vhost-vdpa.c               | 8 --------
 4 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/hw/virtio/vdpa-dev.c b/hw/virtio/vdpa-dev.c
index 465b08c0e3..254a213117 100644
--- a/hw/virtio/vdpa-dev.c
+++ b/hw/virtio/vdpa-dev.c
@@ -53,6 +53,7 @@ static void vhost_vdpa_device_realize(DeviceState *dev, Error **errp)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     VhostVdpaDevice *v = VHOST_VDPA_DEVICE(vdev);
+    struct vhost_vdpa_iova_range iova_range;
     uint16_t max_queue_size;
     struct vhost_virtqueue *vqs;
     int i, ret;
@@ -108,6 +109,14 @@ static void vhost_vdpa_device_realize(DeviceState *dev, Error **errp)
     v->dev.backend_features = 0;
     v->started = false;
 
+    ret = vhost_vdpa_get_iova_range(v->vhostfd, &iova_range);
+    if (ret < 0) {
+        error_setg(errp, "vhost-vdpa-device: get iova range failed: %s",
+                   strerror(-ret));
+        goto free_vqs;
+    }
+    v->vdpa.iova_range = iova_range;
+
     ret = vhost_dev_init(&v->dev, &v->vdpa, VHOST_BACKEND_TYPE_VDPA, 0, NULL);
     if (ret < 0) {
         error_setg(errp, "vhost-vdpa-device: vhost initialization failed: %s",
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index c9289e2c01..f93fac538c 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -380,6 +380,13 @@ static int vhost_vdpa_add_status(struct vhost_dev *dev, uint8_t status)
     return 0;
 }
 
+int vhost_vdpa_get_iova_range(int fd, struct vhost_vdpa_iova_range *iova_range)
+{
+    int ret = ioctl(fd, VHOST_VDPA_GET_IOVA_RANGE, iova_range);
+
+    return ret < 0 ? -errno : 0;
+}
+
 /*
  * The use of this function is for requests that only need to be
  * applied once. Typically such request occurs at the beginning
diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h
index 45b969a311..7997f09a8d 100644
--- a/include/hw/virtio/vhost-vdpa.h
+++ b/include/hw/virtio/vhost-vdpa.h
@@ -51,6 +51,8 @@ typedef struct vhost_vdpa {
     VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX];
 } VhostVDPA;
 
+int vhost_vdpa_get_iova_range(int fd, struct vhost_vdpa_iova_range *iova_range);
+
 int vhost_vdpa_dma_map(struct vhost_vdpa *v, uint32_t asid, hwaddr iova,
                        hwaddr size, void *vaddr, bool readonly);
 int vhost_vdpa_dma_unmap(struct vhost_vdpa *v, uint32_t asid, hwaddr iova,
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 3dcf341722..3c370f2dc5 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -717,14 +717,6 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer,
     return nc;
 }
 
-static int vhost_vdpa_get_iova_range(int fd,
-                                     struct vhost_vdpa_iova_range *iova_range)
-{
-    int ret = ioctl(fd, VHOST_VDPA_GET_IOVA_RANGE, iova_range);
-
-    return ret < 0 ? -errno : 0;
-}
-
 static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp)
 {
     int ret = ioctl(fd, VHOST_GET_FEATURES, features);
-- 
2.27.0