From: Jean-Philippe Brucker <jean-philippe.brucker@xxxxxxx>
Modern virtio requires devices to report how many queues they support. Add
an operation to query all devices about their capacities.
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@xxxxxxx>
Signed-off-by: Julien Thierry <julien.thierry@xxxxxxx>
---
include/kvm/virtio.h | 1 +
virtio/9p.c | 6 ++++++
virtio/balloon.c | 6 ++++++
virtio/blk.c | 6 ++++++
virtio/console.c | 6 ++++++
virtio/net.c | 8 ++++++++
virtio/rng.c | 6 ++++++
virtio/scsi.c | 6 ++++++
8 files changed, 45 insertions(+)
diff --git a/include/kvm/virtio.h b/include/kvm/virtio.h
index f143321..cc49c9d 100644
--- a/include/kvm/virtio.h
+++ b/include/kvm/virtio.h
@@ -184,6 +184,7 @@ struct virtio_ops {
u8 *(*get_config)(struct kvm *kvm, void *dev);
u32 (*get_host_features)(struct kvm *kvm, void *dev);
void (*set_guest_features)(struct kvm *kvm, void *dev, u32 features);
+ int (*get_vq_count)(struct kvm *kvm, void *dev);
int (*init_vq)(struct kvm *kvm, void *dev, u32 vq, u32 page_size,
u32 align, u32 pfn);
int (*notify_vq)(struct kvm *kvm, void *dev, u32 vq);
diff --git a/virtio/9p.c b/virtio/9p.c
index 4b93b4c..94f7a8f 100644
--- a/virtio/9p.c
+++ b/virtio/9p.c
@@ -1440,6 +1440,11 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
return size;
}
+static int get_vq_count(struct kvm *kvm, void *dev)
+{
+ return NUM_VIRT_QUEUES;
+}
+
struct virtio_ops p9_dev_virtio_ops = {
.get_config = get_config,
.get_host_features = get_host_features,
@@ -1450,6 +1455,7 @@ struct virtio_ops p9_dev_virtio_ops = {
.get_pfn_vq = get_pfn_vq,
.get_size_vq = get_size_vq,
.set_size_vq = set_size_vq,
+ .get_vq_count = get_vq_count,
};
int virtio_9p_rootdir_parser(const struct option *opt, const char *arg, int unset)
diff --git a/virtio/balloon.c b/virtio/balloon.c
index 871d6e0..2c2e24a 100644
--- a/virtio/balloon.c
+++ b/virtio/balloon.c
@@ -243,6 +243,11 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
return size;
}
+static int get_vq_count(struct kvm *kvm, void *dev)
+{
+ return NUM_VIRT_QUEUES;
+}
+
struct virtio_ops bln_dev_virtio_ops = {
.get_config = get_config,
.get_host_features = get_host_features,
@@ -253,6 +258,7 @@ struct virtio_ops bln_dev_virtio_ops = {
.get_pfn_vq = get_pfn_vq,
.get_size_vq = get_size_vq,
.set_size_vq = set_size_vq,
+ .get_vq_count = get_vq_count,
};
int virtio_bln__init(struct kvm *kvm)
diff --git a/virtio/blk.c b/virtio/blk.c
index db9f4cc..6502b8c 100644
--- a/virtio/blk.c
+++ b/virtio/blk.c
@@ -248,10 +248,16 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
return size;
}
+static int get_vq_count(struct kvm *kvm, void *dev)
+{
+ return NUM_VIRT_QUEUES;
+}
+
static struct virtio_ops blk_dev_virtio_ops = {
.get_config = get_config,
.get_host_features = get_host_features,
.set_guest_features = set_guest_features,
+ .get_vq_count = get_vq_count,
.init_vq = init_vq,
.notify_status = notify_status,
.notify_vq = notify_vq,
diff --git a/virtio/console.c b/virtio/console.c
index b9df5c9..c96bc11 100644
--- a/virtio/console.c
+++ b/virtio/console.c
@@ -202,10 +202,16 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
return size;
}
+static int get_vq_count(struct kvm *kvm, void *dev)
+{
+ return VIRTIO_CONSOLE_NUM_QUEUES;
+}
+
static struct virtio_ops con_dev_virtio_ops = {
.get_config = get_config,
.get_host_features = get_host_features,
.set_guest_features = set_guest_features,
+ .get_vq_count = get_vq_count,
.init_vq = init_vq,
.notify_status = notify_status,
.notify_vq = notify_vq,
diff --git a/virtio/net.c b/virtio/net.c
index 619b545..3b08aea 100644
--- a/virtio/net.c
+++ b/virtio/net.c
@@ -681,10 +681,18 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
return size;
}
+static int get_vq_count(struct kvm *kvm, void *dev)
+{
+ struct net_dev *ndev = dev;
+
+ return ndev->queue_pairs * 2 + 1;
+}
+
static struct virtio_ops net_dev_virtio_ops = {
.get_config = get_config,
.get_host_features = get_host_features,
.set_guest_features = set_guest_features,
+ .get_vq_count = get_vq_count,
.init_vq = init_vq,
.get_pfn_vq = get_pfn_vq,
.get_size_vq = get_size_vq,
diff --git a/virtio/rng.c b/virtio/rng.c
index 9b9e128..fc0e320 100644
--- a/virtio/rng.c
+++ b/virtio/rng.c
@@ -141,6 +141,11 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
return size;
}
+static int get_vq_count(struct kvm *kvm, void *dev)
+{
+ return NUM_VIRT_QUEUES;
+}
+
static struct virtio_ops rng_dev_virtio_ops = {
.get_config = get_config,
.get_host_features = get_host_features,
@@ -150,6 +155,7 @@ static struct virtio_ops rng_dev_virtio_ops = {
.get_pfn_vq = get_pfn_vq,
.get_size_vq = get_size_vq,
.set_size_vq = set_size_vq,
+ .get_vq_count = get_vq_count,
};
int virtio_rng__init(struct kvm *kvm)
diff --git a/virtio/scsi.c b/virtio/scsi.c
index 788bfa2..e21263c 100644
--- a/virtio/scsi.c
+++ b/virtio/scsi.c
@@ -167,6 +167,11 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
return size;
}
+static int get_vq_count(struct kvm *kvm, void *dev)
+{
+ return NUM_VIRT_QUEUES;
+}
+
static struct virtio_ops scsi_dev_virtio_ops = {
.get_config = get_config,
.get_host_features = get_host_features,
@@ -179,6 +184,7 @@ static struct virtio_ops scsi_dev_virtio_ops = {
.notify_vq = notify_vq,
.notify_vq_gsi = notify_vq_gsi,
.notify_vq_eventfd = notify_vq_eventfd,
+ .get_vq_count = get_vq_count,
};
static void virtio_scsi_vhost_init(struct kvm *kvm, struct scsi_dev *sdev)
--
1.9.1
