From nobody Mon Feb 9 08:57:44 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=1657816924; cv=none; d=zohomail.com; s=zohoarc; b=Flxspqtl4NUIYaN04BHFtOn7M6hre0FP3CW5QPrCsqMNn9dSuIpCPjaZ10/b6xdND73w2zD/0B6mocNHVwOov07w/McxVsUAI2n7AdRZ0gjvOEyJvnT5ueIVuat1T1aYNddyUCWoYFqKtB21kTcolXzAtH27CBbkDNYnrP8qhZk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1657816924; 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=zIUzRSpgorU4MjkslNL1w/Msv06QBTRWh6FpBSdbN0A=; b=EORHYA0+gdy5hcH/78X9bes/PeCs4u8Ec9MpKHKI3/IZdjFjvx1nX3m0pfDIXlH/SENDO2Fg1UzhfyycrRGqPLPaESPH7HGPlfED96xVzkpxDEIUPIgpGC9r3dD41s7gkxbGBvAur4LXj2v6ypvKEm3yTqTmQIZxp+iDxJKwoW0= 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 1657816924173869.0766581410189; Thu, 14 Jul 2022 09:42:04 -0700 (PDT) Received: from localhost ([::1]:51734 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oC1ud-0005O3-5z for importer@patchew.org; Thu, 14 Jul 2022 12:42:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36882) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oC1la-0007tB-I6 for qemu-devel@nongnu.org; Thu, 14 Jul 2022 12:32:45 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:20089) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oC1lX-0003OU-RZ for qemu-devel@nongnu.org; Thu, 14 Jul 2022 12:32:42 -0400 Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-96-rS2zZIOPOyGctdxAGrwdzA-1; Thu, 14 Jul 2022 12:32:27 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id EE71F1019C97; Thu, 14 Jul 2022 16:32:26 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.192.102]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1BB731121314; Thu, 14 Jul 2022 16:32:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1657816356; 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=zIUzRSpgorU4MjkslNL1w/Msv06QBTRWh6FpBSdbN0A=; b=eLOGYY4LXuyAEQaWgGp131TfVC5xqucMujB3yn9rixnQyEM1agoT7B33JcSLDJ7zYfkOI9 XFDROgHNCNfO2x0F5RB+W/Gi8CAYsCSfkn27PsypDena3fbw/g4NU+TZYxx2PkbbjDuEAQ J0lO+6K52vJ8Z+Q8cYN696oMEpo+efA= X-MC-Unique: rS2zZIOPOyGctdxAGrwdzA-1 From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Gautam Dawar , Paolo Bonzini , "Michael S. Tsirkin" , Stefano Garzarella , Eric Blake , Zhu Lingshan , Stefan Hajnoczi , Markus Armbruster , Cornelia Huck , Parav Pandit , Laurent Vivier , Liuxiangdong , Eli Cohen , Cindy Lu , Harpreet Singh Anand , Jason Wang , "Gonglei (Arei)" Subject: [PATCH v2 10/19] vhost: add vhost_svq_push_elem Date: Thu, 14 Jul 2022 18:31:41 +0200 Message-Id: <20220714163150.2536327-11-eperezma@redhat.com> In-Reply-To: <20220714163150.2536327-1-eperezma@redhat.com> References: <20220714163150.2536327-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 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: 1657816925639100001 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 143c86a568..69b352c707 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 SVQElement *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 3b112c4ec8..95a8ab8477 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -429,6 +429,22 @@ static SVQElement *vhost_svq_get_buf(VhostShadowVirtqu= eue *svq, return g_steal_pointer(&svq->ring_id_maps[used_elem.id]); } =20 +/** + * Push an element to SVQ, returning it to the guest. + */ +void vhost_svq_push_elem(VhostShadowVirtqueue *svq, const SVQElement *svq_= elem, + uint32_t len) +{ + virtqueue_push(svq->vq, &svq_elem->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