From 8e36feb4d3480b7c09d9dcbde18c9db1e8063f18 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= Date: Tue, 23 Aug 2022 20:20:06 +0200 Subject: [PATCH 08/23] vdpa: Make SVQ vring unmapping return void MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit RH-Author: Eugenio Pérez RH-MergeRequest: 116: vdpa: Restore device state on destination RH-Bugzilla: 2114060 RH-Acked-by: Cindy Lu RH-Acked-by: Miroslav Rezanina RH-Commit: [7/21] 3366340dc7ae65f83894f5d0da0d1e0f64713751 (eperezmartin/qemu-kvm) Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2114060 Upstream status: git@github.com:jasowang/qemu.git net-next Nothing actually reads the return value, but an error in cleaning some entries could cause device stop to abort, making a restart impossible. Better ignore explicitely the return value. Reported-by: Lei Yang Fixes: 34e3c94eda ("vdpa: Add custom IOTLB translations to SVQ") Signed-off-by: Eugenio Pérez Acked-by: Jason Wang Signed-off-by: Jason Wang (cherry picked from commit bb5cf89ef2338ab6be946ede6821c3f61347eb1b) --- hw/virtio/vhost-vdpa.c | 32 ++++++++++---------------------- 1 file changed, 10 insertions(+), 22 deletions(-) diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index e5c264fb29..8eddf39f2a 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -882,7 +882,7 @@ static int vhost_vdpa_svq_set_fds(struct vhost_dev *dev, /** * Unmap a SVQ area in the device */ -static bool vhost_vdpa_svq_unmap_ring(struct vhost_vdpa *v, +static void vhost_vdpa_svq_unmap_ring(struct vhost_vdpa *v, const DMAMap *needle) { const DMAMap *result = vhost_iova_tree_find_iova(v->iova_tree, needle); @@ -891,38 +891,33 @@ static bool vhost_vdpa_svq_unmap_ring(struct vhost_vdpa *v, if (unlikely(!result)) { error_report("Unable to find SVQ address to unmap"); - return false; + return; } size = ROUND_UP(result->size, qemu_real_host_page_size); r = vhost_vdpa_dma_unmap(v, result->iova, size); if (unlikely(r < 0)) { error_report("Unable to unmap SVQ vring: %s (%d)", g_strerror(-r), -r); - return false; + return; } vhost_iova_tree_remove(v->iova_tree, *result); - return r == 0; } -static bool vhost_vdpa_svq_unmap_rings(struct vhost_dev *dev, +static void vhost_vdpa_svq_unmap_rings(struct vhost_dev *dev, const VhostShadowVirtqueue *svq) { DMAMap needle = {}; struct vhost_vdpa *v = dev->opaque; struct vhost_vring_addr svq_addr; - bool ok; vhost_svq_get_vring_addr(svq, &svq_addr); needle.translated_addr = svq_addr.desc_user_addr; - ok = vhost_vdpa_svq_unmap_ring(v, &needle); - if (unlikely(!ok)) { - return false; - } + vhost_vdpa_svq_unmap_ring(v, &needle); needle.translated_addr = svq_addr.used_user_addr; - return vhost_vdpa_svq_unmap_ring(v, &needle); + vhost_vdpa_svq_unmap_ring(v, &needle); } /** @@ -1093,26 +1088,22 @@ err: return false; } -static bool vhost_vdpa_svqs_stop(struct vhost_dev *dev) +static void vhost_vdpa_svqs_stop(struct vhost_dev *dev) { struct vhost_vdpa *v = dev->opaque; if (!v->shadow_vqs) { - return true; + return; } for (unsigned i = 0; i < v->shadow_vqs->len; ++i) { VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, i); - bool ok = vhost_vdpa_svq_unmap_rings(dev, svq); - if (unlikely(!ok)) { - return false; - } + vhost_vdpa_svq_unmap_rings(dev, svq); } if (v->migration_blocker) { migrate_del_blocker(v->migration_blocker); } - return true; } static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started) @@ -1129,10 +1120,7 @@ static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started) } vhost_vdpa_set_vring_ready(dev); } else { - ok = vhost_vdpa_svqs_stop(dev); - if (unlikely(!ok)) { - return -1; - } + vhost_vdpa_svqs_stop(dev); vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs); } -- 2.31.1