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[PULL 04/57] vhost-vdpa: classify one time request
From: |
Michael S. Tsirkin |
Subject: |
[PULL 04/57] vhost-vdpa: classify one time request |
Date: |
Tue, 5 Oct 2021 12:00:55 -0400 |
From: Jason Wang <jasowang@redhat.com>
Vhost-vdpa uses one device multiqueue queue (pairs) model. So we need
to classify the one time request (e.g SET_OWNER) and make sure those
request were only called once per device.
This is used for multiqueue support.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20210907090322.1756-3-jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
include/hw/virtio/vhost-vdpa.h | 1 +
hw/virtio/vhost-vdpa.c | 52 ++++++++++++++++++++++++++++++----
2 files changed, 47 insertions(+), 6 deletions(-)
diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h
index a8963da2d9..6b9288fef8 100644
--- a/include/hw/virtio/vhost-vdpa.h
+++ b/include/hw/virtio/vhost-vdpa.h
@@ -21,6 +21,7 @@ typedef struct VhostVDPAHostNotifier {
typedef struct vhost_vdpa {
int device_fd;
+ int index;
uint32_t msg_type;
bool iotlb_batch_begin_sent;
MemoryListener listener;
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index 47d7a5a23d..edac4017da 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -279,6 +279,13 @@ static void vhost_vdpa_add_status(struct vhost_dev *dev,
uint8_t status)
vhost_vdpa_call(dev, VHOST_VDPA_SET_STATUS, &s);
}
+static bool vhost_vdpa_one_time_request(struct vhost_dev *dev)
+{
+ struct vhost_vdpa *v = dev->opaque;
+
+ return v->index != 0;
+}
+
static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp)
{
struct vhost_vdpa *v;
@@ -291,6 +298,10 @@ static int vhost_vdpa_init(struct vhost_dev *dev, void
*opaque, Error **errp)
v->listener = vhost_vdpa_memory_listener;
v->msg_type = VHOST_IOTLB_MSG_V2;
+ if (vhost_vdpa_one_time_request(dev)) {
+ return 0;
+ }
+
vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE |
VIRTIO_CONFIG_S_DRIVER);
@@ -401,6 +412,10 @@ static int vhost_vdpa_memslots_limit(struct vhost_dev *dev)
static int vhost_vdpa_set_mem_table(struct vhost_dev *dev,
struct vhost_memory *mem)
{
+ if (vhost_vdpa_one_time_request(dev)) {
+ return 0;
+ }
+
trace_vhost_vdpa_set_mem_table(dev, mem->nregions, mem->padding);
if (trace_event_get_state_backends(TRACE_VHOST_VDPA_SET_MEM_TABLE) &&
trace_event_get_state_backends(TRACE_VHOST_VDPA_DUMP_REGIONS)) {
@@ -424,6 +439,11 @@ static int vhost_vdpa_set_features(struct vhost_dev *dev,
uint64_t features)
{
int ret;
+
+ if (vhost_vdpa_one_time_request(dev)) {
+ return 0;
+ }
+
trace_vhost_vdpa_set_features(dev, features);
ret = vhost_vdpa_call(dev, VHOST_SET_FEATURES, &features);
uint8_t status = 0;
@@ -448,9 +468,12 @@ static int vhost_vdpa_set_backend_cap(struct vhost_dev
*dev)
}
features &= f;
- r = vhost_vdpa_call(dev, VHOST_SET_BACKEND_FEATURES, &features);
- if (r) {
- return -EFAULT;
+
+ if (vhost_vdpa_one_time_request(dev)) {
+ r = vhost_vdpa_call(dev, VHOST_SET_BACKEND_FEATURES, &features);
+ if (r) {
+ return -EFAULT;
+ }
}
dev->backend_cap = features;
@@ -559,11 +582,21 @@ static int vhost_vdpa_dev_start(struct vhost_dev *dev,
bool started)
{
struct vhost_vdpa *v = dev->opaque;
trace_vhost_vdpa_dev_start(dev, started);
+
+ if (started) {
+ vhost_vdpa_host_notifiers_init(dev);
+ vhost_vdpa_set_vring_ready(dev);
+ } else {
+ vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs);
+ }
+
+ if (vhost_vdpa_one_time_request(dev)) {
+ return 0;
+ }
+
if (started) {
uint8_t status = 0;
memory_listener_register(&v->listener, &address_space_memory);
- vhost_vdpa_host_notifiers_init(dev);
- vhost_vdpa_set_vring_ready(dev);
vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK);
vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &status);
@@ -572,7 +605,6 @@ static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool
started)
vhost_vdpa_reset_device(dev);
vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE |
VIRTIO_CONFIG_S_DRIVER);
- vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs);
memory_listener_unregister(&v->listener);
return 0;
@@ -582,6 +614,10 @@ static int vhost_vdpa_dev_start(struct vhost_dev *dev,
bool started)
static int vhost_vdpa_set_log_base(struct vhost_dev *dev, uint64_t base,
struct vhost_log *log)
{
+ if (vhost_vdpa_one_time_request(dev)) {
+ return 0;
+ }
+
trace_vhost_vdpa_set_log_base(dev, base, log->size, log->refcnt, log->fd,
log->log);
return vhost_vdpa_call(dev, VHOST_SET_LOG_BASE, &base);
@@ -647,6 +683,10 @@ static int vhost_vdpa_get_features(struct vhost_dev *dev,
static int vhost_vdpa_set_owner(struct vhost_dev *dev)
{
+ if (vhost_vdpa_one_time_request(dev)) {
+ return 0;
+ }
+
trace_vhost_vdpa_set_owner(dev);
return vhost_vdpa_call(dev, VHOST_SET_OWNER, NULL);
}
--
MST
- [PULL 00/57] pc,pci,virtio: features, fixes, Michael S. Tsirkin, 2021/10/05
- [PULL 04/57] vhost-vdpa: classify one time request,
Michael S. Tsirkin <=
- [PULL 05/57] vhost-vdpa: prepare for the multiqueue support, Michael S. Tsirkin, 2021/10/05
- [PULL 03/57] vhost-vdpa: open device fd in net_init_vhost_vdpa(), Michael S. Tsirkin, 2021/10/05
- [PULL 02/57] hw/virtio: Have virtqueue_get_avail_bytes() pass caches arg to callees, Michael S. Tsirkin, 2021/10/05
- [PULL 07/57] net: introduce control client, Michael S. Tsirkin, 2021/10/05
- [PULL 08/57] vhost-net: control virtqueue support, Michael S. Tsirkin, 2021/10/05
- [PULL 12/57] vhost-vdpa: multiqueue support, Michael S. Tsirkin, 2021/10/05
- [PULL 11/57] virtio-net: vhost control virtqueue support, Michael S. Tsirkin, 2021/10/05
- [PULL 09/57] virtio-net: use "queue_pairs" instead of "queues" when possible, Michael S. Tsirkin, 2021/10/05
- [PULL 10/57] vhost: record the last virtqueue index for the virtio device, Michael S. Tsirkin, 2021/10/05
- [PULL 14/57] vhost-vsock: handle common features in vhost-vsock-common, Michael S. Tsirkin, 2021/10/05