From nobody Mon Nov 25 04:42:05 2024 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=1717630638; cv=none; d=zohomail.com; s=zohoarc; b=L35mIA2ng8ELxiiqkwq1k3ikgzLRXM/tgWXlJFe4lCaomV7rHvOajzyMJoEn5sWVMbzD8qeVTCNg3EGFhovl0fqzg2FLebV+j/e/ul6YeF55I0WHSQ7nIG7PLBecx1ljgHQ1U4OpzmABlJLRQH1eBadR5P99ifTlin3GoPKQnek= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1717630638; h=Content-Type:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=czI6QAqPz2gxBOi54M6w2CiDVJgkcwfGVW3OGis4Be4=; b=VzR8qQwbEokwwt0qyXgCGmI2A7VC1DQRwhcSxhG86OVWCV2p++R/eRCGBCuEiyOWr4HNLnXwIkpDX7AThf+AJ/I3xaHQm+i7mywXmR1aSGhu8WbZD6G8Iy9iKiCYyXoy+yVdqTqPFM8E0snJVnBVNGrwQDKjztiTclLJZVO4G7c= 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 1717630638825764.1952547774099; Wed, 5 Jun 2024 16:37:18 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sF09r-0002rC-N4; Wed, 05 Jun 2024 19:35:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sF09p-0002r3-Ud for qemu-devel@nongnu.org; Wed, 05 Jun 2024 19:35:06 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sF09o-0004w0-BH for qemu-devel@nongnu.org; Wed, 05 Jun 2024 19:35:05 -0400 Received: from mail-lf1-f71.google.com (mail-lf1-f71.google.com [209.85.167.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-463-pscAqLgpPwWIpG81SfnxVA-1; Wed, 05 Jun 2024 19:35:02 -0400 Received: by mail-lf1-f71.google.com with SMTP id 2adb3069b0e04-52b91217fcfso211831e87.3 for ; Wed, 05 Jun 2024 16:35:01 -0700 (PDT) Received: from redhat.com ([2.55.56.67]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a6c805d0af8sm6914366b.87.2024.06.05.16.34.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Jun 2024 16:34:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1717630503; 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: in-reply-to:in-reply-to:references:references; bh=czI6QAqPz2gxBOi54M6w2CiDVJgkcwfGVW3OGis4Be4=; b=Q3a4WbZGliQd/g6ukAcJfOlvkVXzNIRUUoIMAFRUWDIu+qPx3xB0aCL8tRGCbMZqalFlNo FPf3njUueSuZEDrK9A/2rvri5Tm3rlS/JVh6AlF8+AE0KmvTHweBb4zQgwN7l9YFC0CI0r fZ8R3nRwDN/etlADE/whyDtHt8erTPE= X-MC-Unique: pscAqLgpPwWIpG81SfnxVA-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717630500; x=1718235300; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=czI6QAqPz2gxBOi54M6w2CiDVJgkcwfGVW3OGis4Be4=; b=ErruqIlt7L2nFrsLdJEFGknCBFZwA50hvgB+U7Ys3dCdtExPA/lZ8wvJym5ARcjRYy sxBnDm49QqKdlfSkqmabnzIjni+Jw8wh5spCQeslCtH3J04c68z2EBxUqcmcnI2l6wPE ZG2yIDpO8wgrjPbrag/2qUw4JUZwtVGSXmdq3mY6zlj/h/R8kqVe8JgQ0HH3P2WUIbvX Fp8BgkcYfOhGcEENTeo/SeYGkMBw7tjte5WZwCtgg/tVsYmOGwWkcnYK7yvVQf23Cq6v yoKH7U7YwBP6wK0nGl/3OdKPUKYjm9IELEdZL9BveRj5iBwxOfRnPCN6P0yEKlH18dCK ZF/g== X-Gm-Message-State: AOJu0YxyPhH+1cy/egj9onWU5NlMev+FsXqA++Wm9vjcCh1pNNmhYUn5 wCG7AXmi+QHVwiRV+KLKBDpRUt+1+pHT4ygtiA0Gy3Yg8gjZW1cRiN7YPxpaG97JkxGpmOFiJxX oBRxrsOZEVmRHvWy1cg0mL8RXu7nS5Fe9DPGl32dIcl1/gwqUngF9VZ+hLY6zHb9u8ghwJ57U/s Gk90eNzpswGRs+N5w/3Fe/zwzwX1wvDQ== X-Received: by 2002:a05:6512:701:b0:52b:851e:256 with SMTP id 2adb3069b0e04-52bab4c8ea5mr2121686e87.2.1717630500006; Wed, 05 Jun 2024 16:35:00 -0700 (PDT) X-Google-Smtp-Source: AGHT+IE4WLXi0bBIL3OT03bJ4+nfahaM13sRo7yMo9FqEV9GAEsx9c5tKE3MUq3g9cAdqUttkIihFw== X-Received: by 2002:a05:6512:701:b0:52b:851e:256 with SMTP id 2adb3069b0e04-52bab4c8ea5mr2121679e87.2.1717630499532; Wed, 05 Jun 2024 16:34:59 -0700 (PDT) Date: Wed, 5 Jun 2024 19:34:56 -0400 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Cc: Peter Maydell , Jonah Palmer Subject: [PULL v3 05/41] virtio: Prevent creation of device using notification-data with ioeventfd Message-ID: <8fdfaf02767748eadab7ad8ab41da78f261824f2.1717630437.git.mst@redhat.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent 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=170.10.129.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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, 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-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1717630639990100003 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Jonah Palmer Prevent the realization of a virtio device that attempts to use the VIRTIO_F_NOTIFICATION_DATA transport feature without disabling ioeventfd. Due to ioeventfd not being able to carry the extra data associated with this feature, having both enabled is a functional mismatch and therefore Qemu should not continue the device's realization process. Although the device does not yet know if the feature will be successfully negotiated, many devices using this feature wont actually work without this extra data and would fail FEATURES_OK anyway. If ioeventfd is able to work with the extra notification data in the future, this compatibility check can be removed. Signed-off-by: Jonah Palmer Message-Id: <20240315165557.26942-3-jonah.palmer@oracle.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/virtio/virtio.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index f7c99e3a96..28cd406e16 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -2980,6 +2980,20 @@ int virtio_set_features(VirtIODevice *vdev, uint64_t= val) return ret; } =20 +static void virtio_device_check_notification_compatibility(VirtIODevice *v= dev, + Error **errp) +{ + VirtioBusState *bus =3D VIRTIO_BUS(qdev_get_parent_bus(DEVICE(vdev))); + VirtioBusClass *k =3D VIRTIO_BUS_GET_CLASS(bus); + DeviceState *proxy =3D DEVICE(BUS(bus)->parent); + + if (virtio_host_has_feature(vdev, VIRTIO_F_NOTIFICATION_DATA) && + k->ioeventfd_enabled(proxy)) { + error_setg(errp, + "notification_data=3Don without ioeventfd=3Doff is not = supported"); + } +} + size_t virtio_get_config_size(const VirtIOConfigSizeParams *params, uint64_t host_features) { @@ -3740,6 +3754,14 @@ static void virtio_device_realize(DeviceState *dev, = Error **errp) } } =20 + /* Devices should not use both ioeventfd and notification data feature= */ + virtio_device_check_notification_compatibility(vdev, &err); + if (err !=3D NULL) { + error_propagate(errp, err); + vdc->unrealize(dev); + return; + } + virtio_bus_device_plugged(vdev, &err); if (err !=3D NULL) { error_propagate(errp, err); --=20 MST