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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1723110733; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=V+lTPfdbwWLqgbOoapJ1dR/pQLeT9zGj2OBF2Ocp7W0=; b=fGCU0H51S+fqAryueJBYCCnCUX2nTb7K9W2+jq5yGAqYPI5XuDRlCyNmPbeoXr8MHrBjIu Ci3uRYwpDa+MJykzrECPR8V+IlWid+H3DS+o8G3fIufOkOlBNqUUUhBTNgqn2I5A6S8VmO 7MZif0DBhEMjBhhOL3Uk2XL7UKhK7CA= X-MC-Unique: REUXBAmjPJCbgWDGd4om4g-1 From: Prasad Pandit To: qemu-devel@nongnu.org Cc: farosas@suse.de, jasowang@redhat.com, mcoqueli@redhat.com, mst@redhat.com, peterx@redhat.com, pjp@fedoraproject.org Subject: [RFC-PATCH v1 1/2] vhost: fail device start if iotlb update fails Date: Thu, 8 Aug 2024 15:21:46 +0530 Message-ID: <20240808095147.291626-2-ppandit@redhat.com> In-Reply-To: <20240808095147.291626-1-ppandit@redhat.com> References: <20240808095147.291626-1-ppandit@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=ppandit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.144, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1723110775303116600 Content-Type: text/plain; charset="utf-8" From: Prasad Pandit While starting a vhost device, updating iotlb entries via 'vhost_device_iotlb_miss' may return an error. qemu-kvm: vhost_device_iotlb_miss: 700871,700871: Fail to update device iotlb Fail device start when such an error occurs. Signed-off-by: Prasad Pandit --- hw/virtio/vhost.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) v0: -> https://lore.kernel.org/all/20240711131424.181615-3-ppandit@redhat.com/ diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 06fc71746e..a70b7422b5 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -2151,7 +2151,11 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODe= vice *vdev, bool vrings) * vhost-kernel code requires for this.*/ for (i =3D 0; i < hdev->nvqs; ++i) { struct vhost_virtqueue *vq =3D hdev->vqs + i; - vhost_device_iotlb_miss(hdev, vq->used_phys, true); + r =3D vhost_device_iotlb_miss(hdev, vq->used_phys, true); + if (r) { + VHOST_OPS_DEBUG(r, "vhost_device_iotlb_miss failed"); + goto fail_start; + } } } vhost_start_config_intr(hdev); -- 2.46.0