diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/vhost-vdpa.c | 72 |
1 files changed, 69 insertions, 3 deletions
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index d195f48..167b436 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -26,12 +26,15 @@ #include <err.h> #include "standard-headers/linux/virtio_net.h" #include "monitor/monitor.h" +#include "migration/migration.h" +#include "migration/misc.h" #include "hw/virtio/vhost.h" /* Todo:need to add the multiqueue support here */ typedef struct VhostVDPAState { NetClientState nc; struct vhost_vdpa vhost_vdpa; + Notifier migration_state; VHostNetState *vhost_net; /* Control commands shadow buffers */ @@ -239,10 +242,59 @@ static VhostVDPAState *vhost_vdpa_net_first_nc_vdpa(VhostVDPAState *s) return DO_UPCAST(VhostVDPAState, nc, nc0); } +static void vhost_vdpa_net_log_global_enable(VhostVDPAState *s, bool enable) +{ + struct vhost_vdpa *v = &s->vhost_vdpa; + VirtIONet *n; + VirtIODevice *vdev; + int data_queue_pairs, cvq, r; + + /* We are only called on the first data vqs and only if x-svq is not set */ + if (s->vhost_vdpa.shadow_vqs_enabled == enable) { + return; + } + + vdev = v->dev->vdev; + n = VIRTIO_NET(vdev); + if (!n->vhost_started) { + return; + } + + data_queue_pairs = n->multiqueue ? n->max_queue_pairs : 1; + cvq = virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ) ? + n->max_ncs - n->max_queue_pairs : 0; + /* + * TODO: vhost_net_stop does suspend, get_base and reset. We can be smarter + * in the future and resume the device if read-only operations between + * suspend and reset goes wrong. + */ + vhost_net_stop(vdev, n->nic->ncs, data_queue_pairs, cvq); + + /* Start will check migration setup_or_active to configure or not SVQ */ + r = vhost_net_start(vdev, n->nic->ncs, data_queue_pairs, cvq); + if (unlikely(r < 0)) { + error_report("unable to start vhost net: %s(%d)", g_strerror(-r), -r); + } +} + +static void vdpa_net_migration_state_notifier(Notifier *notifier, void *data) +{ + MigrationState *migration = data; + VhostVDPAState *s = container_of(notifier, VhostVDPAState, + migration_state); + + if (migration_in_setup(migration)) { + vhost_vdpa_net_log_global_enable(s, true); + } else if (migration_has_failed(migration)) { + vhost_vdpa_net_log_global_enable(s, false); + } +} + static void vhost_vdpa_net_data_start_first(VhostVDPAState *s) { struct vhost_vdpa *v = &s->vhost_vdpa; + add_migration_state_change_notifier(&s->migration_state); if (v->shadow_vqs_enabled) { v->iova_tree = vhost_iova_tree_new(v->iova_range.first, v->iova_range.last); @@ -256,6 +308,15 @@ static int vhost_vdpa_net_data_start(NetClientState *nc) assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); + if (s->always_svq || + migration_is_setup_or_active(migrate_get_current()->state)) { + v->shadow_vqs_enabled = true; + v->shadow_data = true; + } else { + v->shadow_vqs_enabled = false; + v->shadow_data = false; + } + if (v->index == 0) { vhost_vdpa_net_data_start_first(s); return 0; @@ -276,6 +337,10 @@ static void vhost_vdpa_net_client_stop(NetClientState *nc) assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); + if (s->vhost_vdpa.index == 0) { + remove_migration_state_change_notifier(&s->migration_state); + } + dev = s->vhost_vdpa.dev; if (dev->vq_index + dev->nvqs == dev->vq_index_end) { g_clear_pointer(&s->vhost_vdpa.iova_tree, vhost_iova_tree_delete); @@ -412,11 +477,12 @@ static int vhost_vdpa_net_cvq_start(NetClientState *nc) s = DO_UPCAST(VhostVDPAState, nc, nc); v = &s->vhost_vdpa; - v->shadow_data = s->always_svq; + s0 = vhost_vdpa_net_first_nc_vdpa(s); + v->shadow_data = s0->vhost_vdpa.shadow_vqs_enabled; v->shadow_vqs_enabled = s->always_svq; s->vhost_vdpa.address_space_id = VHOST_VDPA_GUEST_PA_ASID; - if (s->always_svq) { + if (s->vhost_vdpa.shadow_data) { /* SVQ is already configured for all virtqueues */ goto out; } @@ -473,7 +539,6 @@ out: return 0; } - s0 = vhost_vdpa_net_first_nc_vdpa(s); if (s0->vhost_vdpa.iova_tree) { /* * SVQ is already configured for all virtqueues. Reuse IOVA tree for @@ -749,6 +814,7 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer, s->vhost_vdpa.device_fd = vdpa_device_fd; s->vhost_vdpa.index = queue_pair_index; s->always_svq = svq; + s->migration_state.notify = vdpa_net_migration_state_notifier; s->vhost_vdpa.shadow_vqs_enabled = svq; s->vhost_vdpa.iova_range = iova_range; s->vhost_vdpa.shadow_data = svq; |