From nobody Mon Feb 9 11:32:59 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1658225572; cv=none; d=zohomail.com; s=zohoarc; b=eRUsz28NpU8QYyRWJUqWab3+ma5jgGUir6jCZxiyvMrDKZ3oAQ0aRU833qVdfzd2RMbeCtq5+f5ANaPAYlujDL2iWaU+xwBI0J4pMTjQK1rTr2sWF73qUB3WNvzuIRGciRkOljJA1ouCfvQ9yAdS00dgq4LfSfRY2vNrCW66JGg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1658225572; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=YusQHhZy94XBYVlx9gJtmAzBUj11+M86SGlBDFV+5hQ=; b=N/ZkO/97I3v3GihwT1pVcteRFVKzn/OTAQ1ieH4xAjqm3ldpZTLdZKyMqQpacAWPfMDpkg/cDsU/F0kiz4W1W8w7T/ChhtPkLY7DQFos+9sq9MzdpneoXj6BMiYjLfCQE3iVbIHh1BuIpzQFRrc0PL55DF4AADLGS7acPXUlPx4= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1658225572304309.8244767484838; Tue, 19 Jul 2022 03:12:52 -0700 (PDT) Received: from localhost ([::1]:54230 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oDkDj-0008Q6-9Q for importer@patchew.org; Tue, 19 Jul 2022 06:12:51 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50356) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDjyj-00004q-7V for qemu-devel@nongnu.org; Tue, 19 Jul 2022 05:57:22 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:43660) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDjyh-000593-Ni for qemu-devel@nongnu.org; Tue, 19 Jul 2022 05:57:20 -0400 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-516-hcTCkwfuNnW4kD8OaDootQ-1; Tue, 19 Jul 2022 05:57:09 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 355F238173D1; Tue, 19 Jul 2022 09:57:09 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.192.113]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6F32690A11; Tue, 19 Jul 2022 09:57:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1658224638; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YusQHhZy94XBYVlx9gJtmAzBUj11+M86SGlBDFV+5hQ=; b=ffjjAhFN2wCHZ9UEw3zKFkGbwThE6/C5LxG5eFmcyvvLttCe5IaJvtRAw98FilutcXYrt4 7MBLAySx4sSx/ayAA+QA08ZRSApT/B7iQof36ctx8TN+SJi4+BK/qojNS6qyHxObPqtv7d pdEwhmjRE3cIqjgXD6+ZTwo3JDyZPsc= X-MC-Unique: hcTCkwfuNnW4kD8OaDootQ-1 From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Stefan Hajnoczi , Gautam Dawar , Liuxiangdong , Paolo Bonzini , Markus Armbruster , Jason Wang , Cornelia Huck , Parav Pandit , Eric Blake , "Michael S. Tsirkin" , Laurent Vivier , Zhu Lingshan , Eli Cohen , Cindy Lu , "Gonglei (Arei)" , Stefano Garzarella , Harpreet Singh Anand Subject: [PATCH v5 11/20] vhost: add vhost_svq_push_elem Date: Tue, 19 Jul 2022 11:56:20 +0200 Message-Id: <20220719095629.3031338-12-eperezma@redhat.com> In-Reply-To: <20220719095629.3031338-1-eperezma@redhat.com> References: <20220719095629.3031338-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 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=eperezma@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=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1658225574182100001 This function allows external SVQ users to return guest's available buffers. Signed-off-by: Eugenio P=C3=A9rez --- hw/virtio/vhost-shadow-virtqueue.h | 3 +++ hw/virtio/vhost-shadow-virtqueue.c | 16 ++++++++++++++++ 2 files changed, 19 insertions(+) diff --git a/hw/virtio/vhost-shadow-virtqueue.h b/hw/virtio/vhost-shadow-vi= rtqueue.h index 5c7e7cbab6..d9fc1f1799 100644 --- a/hw/virtio/vhost-shadow-virtqueue.h +++ b/hw/virtio/vhost-shadow-virtqueue.h @@ -84,6 +84,9 @@ typedef struct VhostShadowVirtqueue { =20 bool vhost_svq_valid_features(uint64_t features, Error **errp); =20 +void vhost_svq_push_elem(VhostShadowVirtqueue *svq, + const VirtQueueElement *elem, uint32_t len); + void vhost_svq_set_svq_kick_fd(VhostShadowVirtqueue *svq, int svq_kick_fd); void vhost_svq_set_svq_call_fd(VhostShadowVirtqueue *svq, int call_fd); void vhost_svq_get_vring_addr(const VhostShadowVirtqueue *svq, diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-vi= rtqueue.c index 8314405e01..1669b1fcd1 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -428,6 +428,22 @@ static VirtQueueElement *vhost_svq_get_buf(VhostShadow= Virtqueue *svq, return g_steal_pointer(&svq->desc_state[used_elem.id].elem); } =20 +/** + * Push an element to SVQ, returning it to the guest. + */ +void vhost_svq_push_elem(VhostShadowVirtqueue *svq, + const VirtQueueElement *elem, uint32_t len) +{ + virtqueue_push(svq->vq, elem, len); + if (svq->next_guest_avail_elem) { + /* + * Avail ring was full when vhost_svq_flush was called, so it's a + * good moment to make more descriptors available if possible. + */ + vhost_handle_guest_kick(svq); + } +} + static void vhost_svq_flush(VhostShadowVirtqueue *svq, bool check_for_avail_queue) { --=20 2.31.1