From 5ff455d55b2d58a726d2557076e0f5401496de02 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= Date: Thu, 15 Dec 2022 12:31:38 +0100 Subject: [PATCH] vdpa: request iova_range only once MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently iova range is requested once per queue pair in the case of net. Reduce the number of ioctls asking it once at initialization and reusing that value for each vhost_vdpa. Signed-off-by: Eugenio Pérez Message-Id: <20221215113144.322011-7-eperezma@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Acked-by: Jason Wang Signed-off-by: fangyi --- hw/virtio/vhost-vdpa.c | 15 --------------- net/vhost-vdpa.c | 27 ++++++++++++++------------- 2 files changed, 14 insertions(+), 28 deletions(-) diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index 23e715b05c..c0e645ec13 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -367,19 +367,6 @@ static int vhost_vdpa_add_status(struct vhost_dev *dev, uint8_t status) return 0; } -static void vhost_vdpa_get_iova_range(struct vhost_vdpa *v) -{ - int ret = vhost_vdpa_call(v->dev, VHOST_VDPA_GET_IOVA_RANGE, - &v->iova_range); - if (ret != 0) { - v->iova_range.first = 0; - v->iova_range.last = UINT64_MAX; - } - - trace_vhost_vdpa_get_iova_range(v->dev, v->iova_range.first, - v->iova_range.last); -} - /* * The use of this function is for requests that only need to be * applied once. Typically such request occurs at the beginning @@ -468,8 +455,6 @@ static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp) goto err; } - vhost_vdpa_get_iova_range(v); - if (!vhost_vdpa_first_dev(dev)) { return 0; } diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 217d2545c1..be056a2553 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -548,14 +548,15 @@ static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = { }; static NetClientState *net_vhost_vdpa_init(NetClientState *peer, - const char *device, - const char *name, - int vdpa_device_fd, - int queue_pair_index, - int nvqs, - bool is_datapath, - bool svq, - VhostIOVATree *iova_tree) + const char *device, + const char *name, + int vdpa_device_fd, + int queue_pair_index, + int nvqs, + bool is_datapath, + bool svq, + struct vhost_vdpa_iova_range iova_range, + VhostIOVATree *iova_tree) { NetClientState *nc = NULL; VhostVDPAState *s; @@ -574,6 +575,7 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer, s->vhost_vdpa.device_fd = vdpa_device_fd; s->vhost_vdpa.index = queue_pair_index; s->vhost_vdpa.shadow_vqs_enabled = svq; + s->vhost_vdpa.iova_range = iova_range; s->vhost_vdpa.iova_tree = iova_tree; if (!is_datapath) { s->cvq_cmd_out_buffer = qemu_memalign(qemu_real_host_page_size, @@ -653,6 +655,7 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name, int vdpa_device_fd; g_autofree NetClientState **ncs = NULL; g_autoptr(VhostIOVATree) iova_tree = NULL; + struct vhost_vdpa_iova_range iova_range; NetClientState *nc; int queue_pairs, r, i = 0, has_cvq = 0; @@ -696,14 +699,12 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name, return queue_pairs; } + vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); if (opts->x_svq) { - struct vhost_vdpa_iova_range iova_range; - if (!vhost_vdpa_net_valid_svq_features(features, errp)) { goto err_svq; } - vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); iova_tree = vhost_iova_tree_new(iova_range.first, iova_range.last); } @@ -712,7 +713,7 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name, for (i = 0; i < queue_pairs; i++) { ncs[i] = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, vdpa_device_fd, i, 2, true, opts->x_svq, - iova_tree); + iova_range, iova_tree); if (!ncs[i]) goto err; } @@ -720,7 +721,7 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name, if (has_cvq) { nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, vdpa_device_fd, i, 1, false, - opts->x_svq, iova_tree); + opts->x_svq, iova_range, iova_tree); if (!nc) goto err; } -- 2.27.0