From patchwork Mon Apr 20 10:41:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 284198 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBDC1C3815B for ; Mon, 20 Apr 2020 10:46:07 +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 85D51205C9 for ; Mon, 20 Apr 2020 10:46:07 +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="davs6mL9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 85D51205C9 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:33162 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jQTwE-0008BD-J5 for qemu-devel@archiver.kernel.org; Mon, 20 Apr 2020 06:46:06 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58136 helo=eggs1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jQTts-0005zv-9X for qemu-devel@nongnu.org; Mon, 20 Apr 2020 06:43:40 -0400 Received: from Debian-exim by eggs1p.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jQTtq-0006Xo-Dv for qemu-devel@nongnu.org; Mon, 20 Apr 2020 06:43:40 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:33337 helo=us-smtp-1.mimecast.com) by eggs1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jQTtq-0006Tv-0m for qemu-devel@nongnu.org; Mon, 20 Apr 2020 06:43:38 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1587379417; 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=85prQNZYOdYdmYDlnwscr52JS9G6xmXcCH/UecUJ/YA=; b=davs6mL9hfqmtEGLPprwoiRvyVWZyuNH3uwwQY6p8JgOu/6KTGHIL58zYjNjB/AGBNP8DI 5PyDUgKJoOaaJAC4e2ogtofuXhVT03AwNNpIFYefNnrafENmFFIMY86LsFipmgZreGJ0GD aRx4K4pPCRaOtyeTjn+FjLPiWZPToSQ= 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-254-WEf-OKVbO6GZjKnSvneqfQ-1; Mon, 20 Apr 2020 06:43:33 -0400 X-MC-Unique: WEf-OKVbO6GZjKnSvneqfQ-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 75BD8149C0; Mon, 20 Apr 2020 10:43:32 +0000 (UTC) Received: from thinkpad.redhat.com (ovpn-114-254.ams2.redhat.com [10.36.114.254]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3E64C5DD79; Mon, 20 Apr 2020 10:43:10 +0000 (UTC) From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [RFC v2 4/6] qmp: add QMP command virtio-queue-status Date: Mon, 20 Apr 2020 12:41:43 +0200 Message-Id: <20200420104145.205297-5-lvivier@redhat.com> In-Reply-To: <20200420104145.205297-1-lvivier@redhat.com> References: <20200420104145.205297-1-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 Received-SPF: pass client-ip=205.139.110.120; envelope-from=lvivier@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs1p.gnu.org: First seen = 2020/04/20 04:32:42 X-ACL-Warn: Detected OS = 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 , Fam Zheng , Thomas Huth , qemu-block@nongnu.org, Amit Shah , Markus Armbruster , Jason Wang , "Michael S. Tsirkin" , David Hildenbrand , Michael Roth , Max Reitz , Eric Auger , Gerd Hoffmann , Stefan Hajnoczi , =?utf-8?q?Marc-Andr=C3=A9_Lure?= =?utf-8?q?au?= , Paolo Bonzini , Kevin Wolf , "Dr. David Alan Gilbert" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This new command shows internal status of a VirtQueue. (vrings and indexes). Signed-off-by: Laurent Vivier --- Notes: v2: change field names to stick to naming conventions (s/_/-/) hw/virtio/virtio-stub.c | 6 +++ hw/virtio/virtio.c | 35 +++++++++++++++ qapi/virtio.json | 98 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 139 insertions(+) diff --git a/hw/virtio/virtio-stub.c b/hw/virtio/virtio-stub.c index 8fe2d6cd8892..5b4ed6fd531e 100644 --- a/hw/virtio/virtio-stub.c +++ b/hw/virtio/virtio-stub.c @@ -17,3 +17,9 @@ VirtioStatus *qmp_virtio_status(const char* path, Error **errp) { return qmp_virtio_unsupported(errp); } + +VirtQueueStatus *qmp_virtio_queue_status(const char *path, uint16_t queue, + Error **errp) +{ + return qmp_virtio_unsupported(errp); +} diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 6c484822f97b..dd0b57fb9441 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -3877,6 +3877,41 @@ static VirtIODevice *virtio_device_find(const char *path) return NULL; } +VirtQueueStatus *qmp_virtio_queue_status(const char *path, uint16_t queue, + Error **errp) +{ + VirtIODevice *vdev; + VirtQueueStatus *status; + + vdev = virtio_device_find(path); + if (vdev == NULL) { + error_setg(errp, "Path %s is not a VirtIO device", path); + return NULL; + } + + if (queue >= VIRTIO_QUEUE_MAX || !virtio_queue_get_num(vdev, queue)) { + error_setg(errp, "Invalid virtqueue number %d", queue); + return NULL; + } + + status = g_new0(VirtQueueStatus, 1); + status->queue_index = vdev->vq[queue].queue_index; + status->inuse = vdev->vq[queue].inuse; + status->vring_num = vdev->vq[queue].vring.num; + status->vring_num_default = vdev->vq[queue].vring.num_default; + status->vring_align = vdev->vq[queue].vring.align; + status->vring_desc = vdev->vq[queue].vring.desc; + status->vring_avail = vdev->vq[queue].vring.avail; + status->vring_used = vdev->vq[queue].vring.used; + status->last_avail_idx = vdev->vq[queue].last_avail_idx; + status->shadow_avail_idx = vdev->vq[queue].shadow_avail_idx; + status->used_idx = vdev->vq[queue].used_idx; + status->signalled_used = vdev->vq[queue].signalled_used; + status->signalled_used_valid = vdev->vq[queue].signalled_used_valid; + + return status; +} + #define CONVERT_FEATURES(type, map) \ ({ \ type *list = NULL; \ diff --git a/qapi/virtio.json b/qapi/virtio.json index e72237cc1a68..a53a6609567a 100644 --- a/qapi/virtio.json +++ b/qapi/virtio.json @@ -308,3 +308,101 @@ 'data': { 'path': 'str' }, 'returns': 'VirtioStatus' } + +## +# @VirtQueueStatus: +# +# Status of a VirtQueue +# +# @queue-index: VirtQueue queue_index +# +# @inuse: VirtQueue inuse +# +# @vring-num: VirtQueue vring.num +# +# @vring-num-default: VirtQueue vring.num_default +# +# @vring-align: VirtQueue vring.align +# +# @vring-desc: VirtQueue vring.desc +# +# @vring-avail: VirtQueue vring.avail +# +# @vring-used: VirtQueue vring.used +# +# @last-avail-idx: VirtQueue last_avail_idx +# +# @shadow-avail-idx: VirtQueue shadow_avail_idx +# +# @used-idx: VirtQueue used_idx +# +# @signalled-used: VirtQueue signalled_used +# +# @signalled-used-valid: VirtQueue signalled_used_valid +# +# Since: 5.1 +# +## + +{ 'struct': 'VirtQueueStatus', + 'data': { + 'queue-index': 'uint16', + 'inuse': 'uint32', + 'vring-num': 'int', + 'vring-num-default': 'int', + 'vring-align': 'int', + 'vring-desc': 'uint64', + 'vring-avail': 'uint64', + 'vring-used': 'uint64', + 'last-avail-idx': 'uint16', + 'shadow-avail-idx': 'uint16', + 'used-idx': 'uint16', + 'signalled-used': 'uint16', + 'signalled-used-valid': 'uint16' + } +} + +## +# @virtio-queue-status: +# +# Return the status of a given VirtQueue +# +# @path: QOBject path of the VirtIODevice +# +# @queue: queue number to examine +# +# Returns: Status of the VirtQueue +# +# Since: 5.1 +# +# Example: +# +# -> { "execute": "virtio-queue-status", +# "arguments": { +# "path": "/machine/peripheral-anon/device[3]/virtio-backend", +# "queue": 0 +# } +# } +# <- { "return": { +# "signalled-used": 373, +# "inuse": 0, +# "vring-desc": 864411648, +# "vring-num-default": 256, +# "signalled-used-valid": 1, +# "vring-avail": 864415744, +# "last-avail-idx": 373, +# "queue-index": 0, +# "vring-used": 864416320, +# "shadow-avail-idx": 619, +# "used-idx": 373, +# "vring-num": 256, +# "vring-align": 4096 +# } +# } +# +## + +{ 'command': 'virtio-queue-status', + 'data': { 'path': 'str', 'queue': 'uint16' }, + 'returns': 'VirtQueueStatus' +}