From patchwork Tue May 24 17:06:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eugenio Perez Martin X-Patchwork-Id: 12860382 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 42E66C433EF for ; Tue, 24 May 2022 17:06:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237636AbiEXRGz (ORCPT ); Tue, 24 May 2022 13:06:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58760 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239858AbiEXRGx (ORCPT ); Tue, 24 May 2022 13:06:53 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 783E57E1EC for ; Tue, 24 May 2022 10:06:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1653412000; 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=CzDQq+5tNIDPG5pjMCRbvChUv+yaE78gz7PsLUNC710=; b=L2ZMmOtdy/XaZYxgOKvkBCAqEqqfB/ZlOWrebvIgfiWAQP4EpJTPpHVmsgKgEtSby5baeX KBA7QkLLwldLdSnmPSpoYq3x9eSwQokueE2GWMpdtGvIsOL6eVqVYL6ZG3wNi3QhdkmPsJ E+haHjaaYYbVETOPlXnnQXkQHXnWOzU= 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-591-vFnskUC7OHytc2AmGWfdtw-1; Tue, 24 May 2022 13:06:33 -0400 X-MC-Unique: vFnskUC7OHytc2AmGWfdtw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C5F3F100BAB3; Tue, 24 May 2022 17:06:31 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.195.73]) by smtp.corp.redhat.com (Postfix) with ESMTP id 58EAF2026D64; Tue, 24 May 2022 17:06:27 +0000 (UTC) From: =?utf-8?q?Eugenio_P=C3=A9rez?= To: netdev@vger.kernel.org, virtualization@lists.linux-foundation.org, Jason Wang , "Michael S. Tsirkin" , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Parav Pandit , Zhang Min , hanand@xilinx.com, Zhu Lingshan , tanuj.kamde@amd.com, gautam.dawar@amd.com, Christophe JAILLET , Xie Yongji , dinang@xilinx.com, habetsm.xilinx@gmail.com, Eli Cohen , pabloc@xilinx.com, lvivier@redhat.com, Dan Carpenter , lulu@redhat.com, Wu Zongyong , eperezma@redhat.com, ecree.xilinx@gmail.com, Piotr.Uminski@intel.com, martinpo@xilinx.com, Stefano Garzarella , Si-Wei Liu , Longpeng , martinh@xilinx.com Subject: [PATCH v2 3/4] vhost-vdpa: uAPI to stop the device Date: Tue, 24 May 2022 19:06:09 +0200 Message-Id: <20220524170610.2255608-4-eperezma@redhat.com> In-Reply-To: <20220524170610.2255608-1-eperezma@redhat.com> References: <20220524170610.2255608-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org The ioctl adds support for stop the device from userspace. Signed-off-by: Eugenio Pérez --- drivers/vhost/vdpa.c | 18 ++++++++++++++++++ include/uapi/linux/vhost.h | 3 +++ 2 files changed, 21 insertions(+) diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 32713db5831d..a5d33bad92f9 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -478,6 +478,21 @@ static long vhost_vdpa_get_vqs_count(struct vhost_vdpa *v, u32 __user *argp) return 0; } +static long vhost_vdpa_stop(struct vhost_vdpa *v, u32 __user *argp) +{ + struct vdpa_device *vdpa = v->vdpa; + const struct vdpa_config_ops *ops = vdpa->config; + int stop; + + if (!ops->stop) + return -EOPNOTSUPP; + + if (copy_from_user(&stop, argp, sizeof(stop))) + return -EFAULT; + + return ops->stop(vdpa, stop); +} + static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, void __user *argp) { @@ -650,6 +665,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep, case VHOST_VDPA_GET_VQS_COUNT: r = vhost_vdpa_get_vqs_count(v, argp); break; + case VHOST_STOP: + r = vhost_vdpa_stop(v, argp); + break; default: r = vhost_dev_ioctl(&v->vdev, cmd, argp); if (r == -ENOIOCTLCMD) diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h index cab645d4a645..e7526968ab0c 100644 --- a/include/uapi/linux/vhost.h +++ b/include/uapi/linux/vhost.h @@ -171,4 +171,7 @@ #define VHOST_VDPA_SET_GROUP_ASID _IOW(VHOST_VIRTIO, 0x7C, \ struct vhost_vring_state) +/* Stop or resume a device so it does not process virtqueue requests anymore */ +#define VHOST_STOP _IOW(VHOST_VIRTIO, 0x7D, int) + #endif