From patchwork Thu Apr 2 10:02:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 11470419 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1C55881 for ; Thu, 2 Apr 2020 10:05:26 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E59AC2074D for ; Thu, 2 Apr 2020 10:05:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="gId4pP80" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E59AC2074D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:36366 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jJwiz-0004jF-3a for patchwork-qemu-devel@patchwork.kernel.org; Thu, 02 Apr 2020 06:05:25 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33832) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jJwgz-0001K3-8N for qemu-devel@nongnu.org; Thu, 02 Apr 2020 06:03:22 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jJwgy-0000Rs-0s for qemu-devel@nongnu.org; Thu, 02 Apr 2020 06:03:21 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:22083 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jJwgx-0000RF-Pu for qemu-devel@nongnu.org; Thu, 02 Apr 2020 06:03:19 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1585821799; 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=O3I/cokbs6mFo+fIVGu+390hXkIUUIIvuyOMxyh2eEc=; b=gId4pP804dH1TjfLzNfD6e8PAhCiwXInsnZCI/kAgEvFX9EkBtHZNnPXTetIhxrKw0JtX9 PoMMEt0g5NFwiqz6GVyMYsmCvVF1LFtUXWecOrxuWTZ2l2jYeCbUs63YdBw4lvgr3eZTyS 0m4jHc5CHnXWoZXKNDRQFl7y3IvIjB8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-410-1hTzJb0ZOhS8NcwnyZgGbA-1; Thu, 02 Apr 2020 06:03:17 -0400 X-MC-Unique: 1hTzJb0ZOhS8NcwnyZgGbA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DFBE018A5526; Thu, 2 Apr 2020 10:03:16 +0000 (UTC) Received: from thinkpad.redhat.com (ovpn-113-198.ams2.redhat.com [10.36.113.198]) by smtp.corp.redhat.com (Postfix) with ESMTP id B34E75DA66; Thu, 2 Apr 2020 10:03:14 +0000 (UTC) From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [RFC 2/5] qmp: add QMP command virtio-status Date: Thu, 2 Apr 2020 12:02:59 +0200 Message-Id: <20200402100302.833267-3-lvivier@redhat.com> In-Reply-To: <20200402100302.833267-1-lvivier@redhat.com> References: <20200402100302.833267-1-lvivier@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Thomas Huth , "Michael S. Tsirkin" , Markus Armbruster , "Dr. David Alan Gilbert" , Michael Roth , Paolo Bonzini Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This new command shows the status of a VirtIODevice (features, endianness and number of virtqueues) Signed-off-by: Laurent Vivier --- hw/virtio/virtio-stub.c | 5 ++++ hw/virtio/virtio.c | 51 ++++++++++++++++++++++++++++++++ qapi/virtio.json | 65 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 121 insertions(+) diff --git a/hw/virtio/virtio-stub.c b/hw/virtio/virtio-stub.c index d9e4a815ecf1..8fe2d6cd8892 100644 --- a/hw/virtio/virtio-stub.c +++ b/hw/virtio/virtio-stub.c @@ -12,3 +12,8 @@ VirtioInfoList *qmp_query_virtio(Error **errp) { return qmp_virtio_unsupported(errp); } + +VirtioStatus *qmp_virtio_status(const char* path, Error **errp) +{ + return qmp_virtio_unsupported(errp); +} diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 3cebc3d169c8..7f6e21e4ab2c 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -3839,6 +3839,57 @@ VirtioInfoList *qmp_query_virtio(Error **errp) return list; } +static VirtIODevice *virtio_device_find(const char *path) +{ + VirtIODevice *vdev; + + QTAILQ_FOREACH(vdev, &virtio_list, next) { + DeviceState *dev = DEVICE(vdev); + + if (strcmp(dev->canonical_path, path) != 0) { + continue; + } + return vdev; + } + + return NULL; +} + +VirtioStatus *qmp_virtio_status(const char* path, Error **errp) +{ + VirtIODevice *vdev; + VirtioStatus *status; + + vdev = virtio_device_find(path); + if (vdev == NULL) { + error_setg(errp, "Path %s is not a VirtIO device", path); + return NULL; + } + + status = g_new0(VirtioStatus, 1); + status->guest_features = vdev->guest_features; + status->host_features = vdev->host_features; + status->backend_features = vdev->backend_features; + status->device_id = vdev->device_id; + + switch (vdev->device_endian) { + case VIRTIO_DEVICE_ENDIAN_LITTLE: + status->device_endian = g_strdup("little"); + break; + case VIRTIO_DEVICE_ENDIAN_BIG: + status->device_endian = g_strdup("big"); + break; + case VIRTIO_DEVICE_ENDIAN_UNKNOWN: + default: + status->device_endian = g_strdup("unknown"); + break; + } + + status->num_vqs = virtio_get_num_queues(vdev); + + return status; +} + static const TypeInfo virtio_device_info = { .name = TYPE_VIRTIO_DEVICE, .parent = TYPE_DEVICE, diff --git a/qapi/virtio.json b/qapi/virtio.json index 2a95d08a8b9e..2af4d95b9893 100644 --- a/qapi/virtio.json +++ b/qapi/virtio.json @@ -52,3 +52,68 @@ ## { 'command': 'query-virtio', 'returns': ['VirtioInfo'] } + +## +# @VirtioStatus: +# +# @device_id: VirtIODevice status +# +# @device_endian: VirtIODevice device_endian +# +# @guest_features: VirtIODevice guest_features +# +# @host_features: VirtIODevice host_features +# +# @backend_features: VirtIODevice backend_features +# +# @num_vqs: number of VirtIODevice queues +# +# Since: 5.1 +# +## + +{ 'struct': 'VirtioStatus', + 'data': { + 'device_id': 'int', + 'device_endian': 'str', + 'guest_features': 'uint64', + 'host_features': 'uint64', + 'backend_features': 'uint64', + 'num_vqs': 'uint16' + } +} + +## +# @virtio-status: +# +# Return the status of virtio device +# +# @path: QOBject path of the VirtIODevice +# +# Returns: status of the VirtIODevice +# +# Since: 5.1 +# +# Example: +# +# -> { "execute": "virtio-status", +# "arguments": { +# "path": "/machine/peripheral-anon/device[3]/virtio-backend" +# } +# } +# <- { "return": { +# "backend_features": 0, +# "guest_features": 5111807911, +# "num_vqs": 3, +# "host_features": 6337593319, +# "device_endian": "little", +# "device_id": 1 +# } +# } +# +## + +{ 'command': 'virtio-status', + 'data': { 'path': 'str' }, + 'returns': 'VirtioStatus' +}