From: "Longpeng(Mike)" <longpeng2@huawei.com>
To: <jasowang@redhat.com>, <mst@redhat.com>, <sgarzare@redhat.com>,
<stefanha@redhat.com>
Cc: <virtualization@lists.linux-foundation.org>,
<kvm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<netdev@vger.kernel.org>, <arei.gonglei@huawei.com>,
<yechuan@huawei.com>, <huangzhichao@huawei.com>,
Longpeng <longpeng2@huawei.com>
Subject: [RFC 2/3] vdpa: support exposing the count of vqs to userspace
Date: Mon, 17 Jan 2022 17:29:20 +0800 [thread overview]
Message-ID: <20220117092921.1573-3-longpeng2@huawei.com> (raw)
In-Reply-To: <20220117092921.1573-1-longpeng2@huawei.com>
From: Longpeng <longpeng2@huawei.com>
- GET_VQS_COUNT: the count of virtqueues that exposed
Signed-off-by: Longpeng <longpeng2@huawei.com>
---
drivers/vhost/vdpa.c | 13 +++++++++++++
include/uapi/linux/vhost.h | 3 +++
2 files changed, 16 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 1eea14a4ea56..c1074278fc6b 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -369,6 +369,16 @@ static long vhost_vdpa_get_config_size(struct vhost_vdpa *v, u32 __user *argp)
return 0;
}
+static long vhost_vdpa_get_vqs_count(struct vhost_vdpa *v, u32 __user *argp)
+{
+ struct vdpa_device *vdpa = v->vdpa;
+
+ if (copy_to_user(argp, &vdpa->nvqs, sizeof(vdpa->nvqs)))
+ return -EFAULT;
+
+ return 0;
+}
+
static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
void __user *argp)
{
@@ -509,6 +519,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
case VHOST_VDPA_GET_CONFIG_SIZE:
r = vhost_vdpa_get_config_size(v, argp);
break;
+ case VHOST_VDPA_GET_VQS_COUNT:
+ r = vhost_vdpa_get_vqs_count(v, argp);
+ break;
default:
r = vhost_dev_ioctl(&v->vdev, cmd, argp);
if (r == -ENOIOCTLCMD)
diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
index bc74e95a273a..5d99e7c242a2 100644
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h
@@ -154,4 +154,7 @@
/* Get the config size */
#define VHOST_VDPA_GET_CONFIG_SIZE _IOR(VHOST_VIRTIO, 0x79, __u32)
+/* Get the count of all virtqueues */
+#define VHOST_VDPA_GET_VQS_COUNT _IOR(VHOST_VIRTIO, 0x80, __u32)
+
#endif
--
2.23.0
next prev parent reply other threads:[~2022-01-17 9:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-17 9:29 [RFC 0/3] vdpa: add two ioctl commands to support generic vDPA Longpeng(Mike)
2022-01-17 9:29 ` [RFC 1/3] vdpa: support exposing the config size to userspace Longpeng(Mike)
2022-01-18 3:06 ` Jason Wang
2022-01-17 9:29 ` Longpeng(Mike) [this message]
2022-01-18 3:07 ` [RFC 2/3] vdpa: support exposing the count of vqs " Jason Wang
2022-03-10 3:16 ` Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
2022-01-17 9:29 ` [RFC 3/3] vdpasim_net: control virtqueue support Longpeng(Mike)
2022-01-18 3:09 ` Jason Wang
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