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charset="utf-8" Should help live migration downtime on source host. Below are the coalesced dma_unmap time series on 2 queue pair config (no dedicated descriptor group ASID for SVQ). 109531@1693367276.853503:vhost_vdpa_reset_device dev: 0x55c933926890 109531@1693367276.853513:vhost_vdpa_add_status dev: 0x55c933926890 status: = 0x3 109531@1693367276.853520:vhost_vdpa_flush_map dev: 0x55c933926890 doit: 1 s= vq_flush: 0 persist: 1 109531@1693367276.853524:vhost_vdpa_set_config_call dev: 0x55c933926890 fd:= -1 109531@1693367276.853579:vhost_vdpa_iotlb_begin_batch vdpa:0x7fa2aa895190 f= d: 16 msg_type: 2 type: 5 109531@1693367276.853586:vhost_vdpa_dma_unmap vdpa:0x7fa2aa895190 fd: 16 ms= g_type: 2 asid: 0 iova: 0x1000 size: 0x2000 type: 3 109531@1693367276.853600:vhost_vdpa_dma_unmap vdpa:0x7fa2aa895190 fd: 16 ms= g_type: 2 asid: 0 iova: 0x3000 size: 0x1000 type: 3 109531@1693367276.853618:vhost_vdpa_dma_unmap vdpa:0x7fa2aa895190 fd: 16 ms= g_type: 2 asid: 0 iova: 0x4000 size: 0x2000 type: 3 109531@1693367276.853625:vhost_vdpa_dma_unmap vdpa:0x7fa2aa895190 fd: 16 ms= g_type: 2 asid: 0 iova: 0x6000 size: 0x1000 type: 3 109531@1693367276.853630:vhost_vdpa_dma_unmap vdpa:0x7fa2aa84c190 fd: 16 ms= g_type: 2 asid: 0 iova: 0x7000 size: 0x2000 type: 3 109531@1693367276.853636:vhost_vdpa_dma_unmap vdpa:0x7fa2aa84c190 fd: 16 ms= g_type: 2 asid: 0 iova: 0x9000 size: 0x1000 type: 3 109531@1693367276.853642:vhost_vdpa_dma_unmap vdpa:0x7fa2aa84c190 fd: 16 ms= g_type: 2 asid: 0 iova: 0xa000 size: 0x2000 type: 3 109531@1693367276.853648:vhost_vdpa_dma_unmap vdpa:0x7fa2aa84c190 fd: 16 ms= g_type: 2 asid: 0 iova: 0xc000 size: 0x1000 type: 3 109531@1693367276.853654:vhost_vdpa_dma_unmap vdpa:0x7fa2aa6b6190 fd: 16 ms= g_type: 2 asid: 0 iova: 0xf000 size: 0x1000 type: 3 109531@1693367276.853660:vhost_vdpa_dma_unmap vdpa:0x7fa2aa6b6190 fd: 16 ms= g_type: 2 asid: 0 iova: 0x10000 size: 0x1000 type: 3 109531@1693367276.853666:vhost_vdpa_dma_unmap vdpa:0x7fa2aa6b6190 fd: 16 ms= g_type: 2 asid: 0 iova: 0xd000 size: 0x1000 type: 3 109531@1693367276.853670:vhost_vdpa_dma_unmap vdpa:0x7fa2aa6b6190 fd: 16 ms= g_type: 2 asid: 0 iova: 0xe000 size: 0x1000 type: 3 109531@1693367276.853675:vhost_vdpa_iotlb_end_batch vdpa:0x7fa2aa895190 fd:= 16 msg_type: 2 type: 6 109531@1693367277.014697:vhost_vdpa_get_vq_index dev: 0x55c933925de0 idx: 0= vq idx: 0 109531@1693367277.014747:vhost_vdpa_get_vq_index dev: 0x55c933925de0 idx: 1= vq idx: 1 109531@1693367277.014753:vhost_vdpa_get_vq_index dev: 0x55c9339262e0 idx: 2= vq idx: 2 109531@1693367277.014756:vhost_vdpa_get_vq_index dev: 0x55c9339262e0 idx: 3= vq idx: 3 Signed-off-by: Si-Wei Liu --- hw/virtio/vhost-vdpa.c | 7 +-- include/hw/virtio/vhost-vdpa.h | 3 ++ net/vhost-vdpa.c | 112 +++++++++++++++++++++++++++----------= ---- 3 files changed, 80 insertions(+), 42 deletions(-) diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index d98704a..4010fd9 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -1162,8 +1162,8 @@ static void vhost_vdpa_svq_unmap_ring(struct vhost_vd= pa *v, hwaddr addr) vhost_iova_tree_remove(v->shared->iova_tree, *result); } =20 -static void vhost_vdpa_svq_unmap_rings(struct vhost_dev *dev, - const VhostShadowVirtqueue *svq) +void vhost_vdpa_svq_unmap_rings(struct vhost_dev *dev, + const VhostShadowVirtqueue *svq) { struct vhost_vdpa *v =3D dev->opaque; struct vhost_vring_addr svq_addr; @@ -1346,17 +1346,14 @@ static void vhost_vdpa_svqs_stop(struct vhost_dev *= dev) return; } =20 - vhost_vdpa_dma_batch_begin_once(v->shared, v->address_space_id); for (unsigned i =3D 0; i < v->shadow_vqs->len; ++i) { VhostShadowVirtqueue *svq =3D g_ptr_array_index(v->shadow_vqs, i); =20 vhost_svq_stop(svq); - vhost_vdpa_svq_unmap_rings(dev, svq); =20 event_notifier_cleanup(&svq->hdev_kick); event_notifier_cleanup(&svq->hdev_call); } - vhost_vdpa_dma_batch_end_once(v->shared, v->address_space_id); } =20 static void vhost_vdpa_suspend(struct vhost_dev *dev) diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h index aa13679..f426e2c 100644 --- a/include/hw/virtio/vhost-vdpa.h +++ b/include/hw/virtio/vhost-vdpa.h @@ -112,6 +112,9 @@ int vhost_vdpa_dma_batch_end_once(VhostVDPAShared *s, u= int32_t asid); int vhost_vdpa_load_setup(VhostVDPAShared *s, AddressSpace *dma_as); int vhost_vdpa_load_cleanup(VhostVDPAShared *s, bool vhost_will_start); =20 +void vhost_vdpa_svq_unmap_rings(struct vhost_dev *dev, + const VhostShadowVirtqueue *svq); + typedef struct vdpa_iommu { VhostVDPAShared *dev_shared; IOMMUMemoryRegion *iommu_mr; diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 683619f..41714d1 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -29,6 +29,7 @@ #include "migration/migration.h" #include "migration/misc.h" #include "hw/virtio/vhost.h" +#include "hw/virtio/vhost-vdpa.h" =20 /* Todo:need to add the multiqueue support here */ typedef struct VhostVDPAState { @@ -467,15 +468,89 @@ static int vhost_vdpa_net_data_load(NetClientState *n= c) return 0; } =20 +static void vhost_vdpa_cvq_unmap_buf(struct vhost_vdpa *v, void *addr) +{ + VhostIOVATree *tree =3D v->shared->iova_tree; + DMAMap needle =3D { + /* + * No need to specify size or to look for more translations since + * this contiguous chunk was allocated by us. + */ + .translated_addr =3D (hwaddr)(uintptr_t)addr, + }; + const DMAMap *map =3D vhost_iova_tree_find_iova(tree, &needle); + int r; + + if (unlikely(!map)) { + error_report("Cannot locate expected map"); + return; + } + + r =3D vhost_vdpa_dma_unmap(v->shared, v->address_space_id, map->iova, + map->size + 1); + if (unlikely(r !=3D 0)) { + error_report("Device cannot unmap: %s(%d)", g_strerror(r), r); + } + + vhost_iova_tree_remove(tree, *map); +} + static void vhost_vdpa_net_client_stop(NetClientState *nc) { VhostVDPAState *s =3D DO_UPCAST(VhostVDPAState, nc, nc); + struct vhost_vdpa *v =3D &s->vhost_vdpa; + struct vhost_vdpa *last_vi =3D NULL; + bool has_cvq =3D v->dev->vq_index_end % 2; + int nvqp; =20 assert(nc->info->type =3D=3D NET_CLIENT_DRIVER_VHOST_VDPA); =20 if (s->vhost_vdpa.index =3D=3D 0) { migration_remove_notifier(&s->migration_state); } + + if (v->dev->vq_index + v->dev->nvqs !=3D v->dev->vq_index_end) { + return; + } + + nvqp =3D (v->dev->vq_index_end + 1) / 2; + for (int i =3D 0; i < nvqp; ++i) { + VhostVDPAState *s_i =3D vhost_vdpa_net_get_nc_vdpa(s, i); + struct vhost_vdpa *v_i =3D &s_i->vhost_vdpa; + + if (!v_i->shadow_vqs_enabled) { + continue; + } + if (!last_vi) { + vhost_vdpa_dma_batch_begin_once(v_i->shared, + v_i->address_space_id); + last_vi =3D v_i; + } else if (last_vi->address_space_id !=3D v_i->address_space_id) { + vhost_vdpa_dma_batch_end_once(last_vi->shared, + last_vi->address_space_id); + vhost_vdpa_dma_batch_begin_once(v_i->shared, + v_i->address_space_id); + last_vi =3D v_i; + } + + for (unsigned j =3D 0; j < v_i->shadow_vqs->len; ++j) { + VhostShadowVirtqueue *svq =3D g_ptr_array_index(v_i->shadow_vq= s, j); + + vhost_vdpa_svq_unmap_rings(v_i->dev, svq); + } + } + if (has_cvq) { + if (last_vi) { + assert(last_vi->address_space_id =3D=3D v->address_space_id); + } + vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); + vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); + } + if (last_vi) { + vhost_vdpa_dma_batch_end_once(last_vi->shared, + last_vi->address_space_id); + last_vi =3D NULL; + } } =20 static int vhost_vdpa_net_load_setup(NetClientState *nc, NICState *nic) @@ -585,33 +660,6 @@ static int64_t vhost_vdpa_get_vring_desc_group(int dev= ice_fd, return state.num; } =20 -static void vhost_vdpa_cvq_unmap_buf(struct vhost_vdpa *v, void *addr) -{ - VhostIOVATree *tree =3D v->shared->iova_tree; - DMAMap needle =3D { - /* - * No need to specify size or to look for more translations since - * this contiguous chunk was allocated by us. - */ - .translated_addr =3D (hwaddr)(uintptr_t)addr, - }; - const DMAMap *map =3D vhost_iova_tree_find_iova(tree, &needle); - int r; - - if (unlikely(!map)) { - error_report("Cannot locate expected map"); - return; - } - - r =3D vhost_vdpa_dma_unmap(v->shared, v->address_space_id, map->iova, - map->size + 1); - if (unlikely(r !=3D 0)) { - error_report("Device cannot unmap: %s(%d)", g_strerror(r), r); - } - - vhost_iova_tree_remove(tree, *map); -} - /** Map CVQ buffer. */ static int vhost_vdpa_cvq_map_buf(struct vhost_vdpa *v, void *buf, size_t = size, bool write) @@ -740,18 +788,8 @@ err: =20 static void vhost_vdpa_net_cvq_stop(NetClientState *nc) { - VhostVDPAState *s =3D DO_UPCAST(VhostVDPAState, nc, nc); - struct vhost_vdpa *v =3D &s->vhost_vdpa; - assert(nc->info->type =3D=3D NET_CLIENT_DRIVER_VHOST_VDPA); =20 - if (s->vhost_vdpa.shadow_vqs_enabled) { - vhost_vdpa_dma_batch_begin_once(v->shared, v->address_space_id); - vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); - vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); - vhost_vdpa_dma_batch_end_once(v->shared, v->address_space_id); - } - vhost_vdpa_net_client_stop(nc); } =20 --=20 1.8.3.1