From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1C909C55167 for ; Fri, 31 Jul 2026 05:59:51 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wpgFX-0002Zi-Ss; Fri, 31 Jul 2026 01:57:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wpeM8-0005u7-SV; Thu, 30 Jul 2026 23:56:20 -0400 Received: from [115.124.30.112] (helo=out30-112.freemail.mail.aliyun.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wpeM4-0002Io-L1; Thu, 30 Jul 2026 23:56:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1785470171; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=GQ/4VXmOCNFDf0yhmuSdsBqHH33B0VAJ2TNmvzzIRV0=; b=Ks+KPtX+SrBjPJ9epnoi3SwmAasSar4vft7wrOGqOx+wDe+lvplWeAo9ZkQfwxuq2t1K2d+la0dMe+5Jb9wKjcmiEkM8h5SjqR3hEKrJBZBZ7jdi4TYR8C2USnvL7I2cCYWmPdjQCIPuYvQJfkujPWQ0DQP3H9TLMUxO14/TypY= X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R171e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=maildocker-contentspam033032089153; MF=blduan@linux.alibaba.com; NM=1; PH=DS; RN=7; SR=0; TI=SMTPD_---0X86jwVB_1785469858; Received: from ea134-sw16.eng.xrvm.cn(mailfrom:blduan@linux.alibaba.com fp:SMTPD_---0X86jwVB_1785469858 cluster:ay36) by smtp.aliyun-inc.com; Fri, 31 Jul 2026 11:50:59 +0800 From: Baolong Duan To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, alistair23@gmail.com, dbarboza@ventanamicro.com, cxx194832@alibaba-inc.com, zengxiangyi.zxy@alibaba-inc.com, Baolong Duan Subject: [RFC PATCH v1 12/17] hw/net/virtio-net: do not use vhost for a CoVE guest Date: Fri, 31 Jul 2026 11:50:06 +0800 Message-Id: <20260731035011.4178103-13-blduan@linux.alibaba.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260731035011.4178103-1-blduan@linux.alibaba.com> References: <20260731035011.4178103-1-blduan@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 115.124.30.112 (deferred) Received-SPF: pass client-ip=115.124.30.112; envelope-from=blduan@linux.alibaba.com; helo=out30-112.freemail.mail.aliyun.com X-Spam_score_int: -166 X-Spam_score: -16.7 X-Spam_bar: ---------------- X-Spam_report: (-16.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_DEF_SPF_WL=-7.5 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Fri, 31 Jul 2026 01:57:12 -0400 X-BeenThere: qemu-riscv@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-riscv-bounces+qemu-riscv=archiver.kernel.org@nongnu.org Sender: qemu-riscv-bounces+qemu-riscv=archiver.kernel.org@nongnu.org The in-kernel vhost datapath has no access to the memory of a TEE VM, so it cannot be used. Signed-off-by: Baolong Duan --- hw/net/virtio-net.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 814b99a43d..4f8db1a1aa 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -28,6 +28,7 @@ #include "qemu/config-file.h" #include "qobject/qdict.h" #include "hw/virtio/virtio-net.h" +#include "hw/riscv/cove.h" #include "net/vhost_net.h" #include "net/announce.h" #include "hw/virtio/virtio-bus.h" @@ -326,6 +327,14 @@ static void virtio_net_vhost_status(VirtIONet *n, uint8_t status) } } + /* + * vhost cannot be used with a CoVE guest: the kernel datapath has no + * access to the memory of the TVM. + */ + if (riscv_cove_vm_active()) { + return; + } + n->vhost_started = 1; r = vhost_net_start(vdev, n->nic->ncs, queue_pairs, cvq); if (r < 0) { -- 2.34.1