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, mika.penttila@nextfour.com,
dan.carpenter@oracle.com
Cc: virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, kvm@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: [PATCH v5 10/11] vduse: Add config interrupt support
Date: Mon, 15 Mar 2021 13:37:20 +0800 [thread overview]
Message-ID: <20210315053721.189-11-xieyongji@bytedance.com> (raw)
In-Reply-To: <20210315053721.189-1-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 07d0ae92d470..cc12b58bdc09 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -64,6 +64,8 @@ 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;
@@ -439,6 +441,11 @@ static void vduse_dev_reset(struct vduse_dev *dev)
vduse_domain_reset_bounce_map(dev->domain);
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];
@@ -557,7 +564,12 @@ 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)
@@ -842,6 +854,15 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd,
ret = 0;
queue_work(vduse_irq_wq, &dev->vqs[arg].inject);
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;
@@ -918,6 +939,7 @@ static struct vduse_dev *vduse_dev_create(void)
INIT_LIST_HEAD(&dev->send_list);
INIT_LIST_HEAD(&dev->recv_list);
atomic64_set(&dev->msg_unique, 0);
+ spin_lock_init(&dev->irq_lock);
init_waitqueue_head(&dev->waitq);
diff --git a/include/uapi/linux/vduse.h b/include/uapi/linux/vduse.h
index 37f7d7059aa8..337e766f5622 100644
--- a/include/uapi/linux/vduse.h
+++ b/include/uapi/linux/vduse.h
@@ -150,4 +150,7 @@ 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:[~2021-03-15 5:39 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 5:37 [PATCH v5 00/11] Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-03-15 5:37 ` [PATCH v5 01/11] file: Export __receive_fd() to modules Xie Yongji
2021-03-15 9:08 ` Christoph Hellwig
2021-03-15 9:46 ` Yongji Xie
2021-03-15 14:44 ` Christian Brauner
2021-03-16 2:48 ` Yongji Xie
2021-03-25 8:23 ` Christoph Hellwig
2021-03-25 11:04 ` Yongji Xie
2021-03-15 5:37 ` [PATCH v5 02/11] eventfd: Increase the recursion depth of eventfd_signal() Xie Yongji
2021-03-15 5:37 ` [PATCH v5 03/11] vhost-vdpa: protect concurrent access to vhost device iotlb Xie Yongji
2021-03-23 3:02 ` Jason Wang
2021-03-23 7:25 ` Yongji Xie
2021-03-25 11:08 ` Stefano Garzarella
2021-03-15 5:37 ` [PATCH v5 04/11] vhost-iotlb: Add an opaque pointer for vhost IOTLB Xie Yongji
2021-03-15 5:37 ` [PATCH v5 05/11] vdpa: Add an opaque pointer for vdpa_config_ops.dma_map() Xie Yongji
2021-03-15 5:37 ` [PATCH v5 06/11] vdpa: factor out vhost_vdpa_pa_map() Xie Yongji
2021-03-23 3:09 ` Jason Wang
2021-03-15 5:37 ` [PATCH v5 07/11] vdpa: Support transferring virtual addressing during DMA mapping Xie Yongji
2021-03-23 3:13 ` Jason Wang
2021-03-23 7:26 ` Yongji Xie
2021-03-15 5:37 ` [PATCH v5 08/11] vduse: Implement an MMU-based IOMMU driver Xie Yongji
2021-03-24 3:54 ` Jason Wang
2021-03-24 7:39 ` Yongji Xie
2021-03-25 4:52 ` Jason Wang
2021-03-25 7:38 ` Yongji Xie
2021-03-26 4:26 ` Jason Wang
2021-03-26 5:14 ` Yongji Xie
[not found] ` <75e3b941-dfd2-ebbc-d752-8f25c1f14cab@redhat.com>
2021-03-26 6:56 ` Yongji Xie
2021-03-26 7:36 ` Jason Wang
2021-03-15 5:37 ` [PATCH v5 09/11] vduse: Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-03-24 4:43 ` Jason Wang
2021-03-24 8:55 ` Yongji Xie
2021-03-25 6:30 ` Jason Wang
2021-03-25 7:47 ` Yongji Xie
2021-03-15 5:37 ` Xie Yongji [this message]
2021-03-24 4:45 ` [PATCH v5 10/11] vduse: Add config interrupt support Jason Wang
2021-03-24 8:56 ` Yongji Xie
2021-03-15 5:37 ` [PATCH v5 11/11] Documentation: Add documentation for VDUSE Xie Yongji
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