From: Xie Yongji <xieyongji@bytedance.com>
To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com,
sgarzare@redhat.com, parav@nvidia.com, bob.liu@oracle.com,
hch@infradead.org, rdunlap@infradead.org, willy@infradead.org,
viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org,
corbet@lwn.net
Cc: virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, kvm@vger.kernel.org, linux-aio@kvack.org,
linux-fsdevel@vger.kernel.org
Subject: [RFC v4 08/11] vduse: Add config interrupt support
Date: Tue, 23 Feb 2021 19:50:45 +0800 [thread overview]
Message-ID: <20210223115048.435-9-xieyongji@bytedance.com> (raw)
In-Reply-To: <20210223115048.435-1-xieyongji@bytedance.com>
This patch introduces a new ioctl VDUSE_INJECT_CONFIG_IRQ
to support injecting config interrupt.
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
---
drivers/vdpa/vdpa_user/vduse_dev.c | 24 +++++++++++++++++++++++-
include/uapi/linux/vduse.h | 3 +++
2 files changed, 26 insertions(+), 1 deletion(-)
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index 393bf99c48be..8042d3fa57f1 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -66,6 +66,8 @@ struct vduse_dev {
struct list_head send_list;
struct list_head recv_list;
struct list_head list;
+ struct vdpa_callback config_cb;
+ spinlock_t irq_lock;
bool connected;
int minor;
u16 vq_size_max;
@@ -483,6 +485,11 @@ static void vduse_dev_reset(struct vduse_dev *dev)
vduse_iotlb_del_range(dev, 0ULL, ULLONG_MAX);
vduse_dev_update_iotlb(dev, 0ULL, ULLONG_MAX);
+ spin_lock(&dev->irq_lock);
+ dev->config_cb.callback = NULL;
+ dev->config_cb.private = NULL;
+ spin_unlock(&dev->irq_lock);
+
for (i = 0; i < dev->vq_num; i++) {
struct vduse_virtqueue *vq = &dev->vqs[i];
@@ -599,7 +606,12 @@ static int vduse_vdpa_set_features(struct vdpa_device *vdpa, u64 features)
static void vduse_vdpa_set_config_cb(struct vdpa_device *vdpa,
struct vdpa_callback *cb)
{
- /* We don't support config interrupt */
+ struct vduse_dev *dev = vdpa_to_vduse(vdpa);
+
+ spin_lock(&dev->irq_lock);
+ dev->config_cb.callback = cb->callback;
+ dev->config_cb.private = cb->private;
+ spin_unlock(&dev->irq_lock);
}
static u16 vduse_vdpa_get_vq_num_max(struct vdpa_device *vdpa)
@@ -913,6 +925,15 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd,
spin_unlock_irq(&vq->irq_lock);
break;
}
+ case VDUSE_INJECT_CONFIG_IRQ:
+ ret = -EINVAL;
+ spin_lock_irq(&dev->irq_lock);
+ if (dev->config_cb.callback) {
+ dev->config_cb.callback(dev->config_cb.private);
+ ret = 0;
+ }
+ spin_unlock_irq(&dev->irq_lock);
+ break;
default:
ret = -ENOIOCTLCMD;
break;
@@ -996,6 +1017,7 @@ static struct vduse_dev *vduse_dev_create(void)
INIT_LIST_HEAD(&dev->recv_list);
atomic64_set(&dev->msg_unique, 0);
spin_lock_init(&dev->iommu_lock);
+ spin_lock_init(&dev->irq_lock);
atomic_set(&dev->bounce_map, 0);
init_waitqueue_head(&dev->waitq);
diff --git a/include/uapi/linux/vduse.h b/include/uapi/linux/vduse.h
index 9391c4acfa53..9070cd512cb4 100644
--- a/include/uapi/linux/vduse.h
+++ b/include/uapi/linux/vduse.h
@@ -133,4 +133,7 @@ struct vduse_vq_eventfd {
/* Inject an interrupt for specific virtqueue */
#define VDUSE_INJECT_VQ_IRQ _IO(VDUSE_BASE, 0x05)
+/* Inject a config interrupt */
+#define VDUSE_INJECT_CONFIG_IRQ _IO(VDUSE_BASE, 0x06)
+
#endif /* _UAPI_VDUSE_H_ */
--
2.11.0
next prev parent reply other threads:[~2021-02-23 12:04 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-23 11:50 [RFC v4 00/11] Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-02-23 11:50 ` [RFC v4 01/11] eventfd: Increase the recursion depth of eventfd_signal() Xie Yongji
2021-03-02 6:44 ` Jason Wang
2021-03-02 10:32 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 02/11] vhost-vdpa: protect concurrent access to vhost device iotlb Xie Yongji
2021-03-02 6:47 ` Jason Wang
2021-03-02 10:20 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 03/11] vhost-iotlb: Add an opaque pointer for vhost IOTLB Xie Yongji
2021-03-02 6:49 ` Jason Wang
2021-02-23 11:50 ` [RFC v4 04/11] vdpa: Add an opaque pointer for vdpa_config_ops.dma_map() Xie Yongji
2021-03-02 6:50 ` Jason Wang
2021-02-23 11:50 ` [RFC v4 05/11] vdpa: Support transferring virtual addressing during DMA mapping Xie Yongji
2021-03-03 10:52 ` Mika Penttilä
2021-03-03 12:45 ` Yongji Xie
2021-03-03 13:38 ` Mika Penttilä
2021-03-04 3:07 ` Jason Wang
2021-03-04 5:40 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 06/11] vduse: Implement an MMU-based IOMMU driver Xie Yongji
2021-03-04 4:20 ` Jason Wang
2021-03-04 5:12 ` Yongji Xie
2021-03-05 3:35 ` Jason Wang
2021-03-05 6:15 ` Yongji Xie
[not found] ` <4db35f8c-ee3a-90fb-8d14-5d6014b4f6fa@redhat.com>
2021-03-05 7:13 ` Yongji Xie
2021-03-05 7:27 ` Jason Wang
2021-03-05 7:59 ` Yongji Xie
2021-03-08 3:17 ` Jason Wang
2021-03-08 3:45 ` Yongji Xie
2021-03-08 3:52 ` Jason Wang
2021-03-08 5:05 ` Yongji Xie
2021-03-08 7:04 ` Jason Wang
2021-03-08 7:08 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 07/11] vduse: Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-03-04 6:27 ` Jason Wang
2021-03-04 8:05 ` Yongji Xie
2021-03-05 3:20 ` Jason Wang
2021-03-05 3:49 ` Yongji Xie
2021-03-10 12:58 ` Jason Wang
2021-03-11 2:28 ` Yongji Xie
2021-02-23 11:50 ` Xie Yongji [this message]
2021-02-23 11:50 ` [RFC v4 09/11] Documentation: Add documentation for VDUSE Xie Yongji
2021-03-04 6:39 ` Jason Wang
2021-03-04 10:35 ` Yongji Xie
2021-02-23 11:50 ` [RFC v4 10/11] vduse: Introduce a workqueue for irq injection Xie Yongji
2021-03-04 6:59 ` Jason Wang
2021-03-04 8:58 ` Yongji Xie
2021-03-05 3:04 ` Jason Wang
2021-03-05 3:30 ` Yongji Xie
2021-03-05 3:42 ` Jason Wang
2021-03-05 6:36 ` Yongji Xie
2021-03-05 7:01 ` Jason Wang
2021-03-05 7:27 ` Yongji Xie
2021-03-05 7:36 ` Jason Wang
2021-03-05 8:12 ` Yongji Xie
2021-03-08 3:04 ` Jason Wang
2021-03-08 4:50 ` Yongji Xie
2021-03-08 7:01 ` Jason Wang
2021-03-08 7:16 ` Yongji Xie
2021-03-08 7:29 ` Jason Wang
2021-02-23 11:50 ` [RFC v4 11/11] vduse: Support binding irq to the specified cpu Xie Yongji
2021-03-04 7:30 ` Jason Wang
2021-03-04 8:19 ` Yongji Xie
2021-03-05 3:11 ` Jason Wang
2021-03-05 3:37 ` Yongji Xie
2021-03-05 3:44 ` Jason Wang
2021-03-05 6:40 ` Yongji Xie
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