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 ws5-mx01.kavi.com (ws5-mx01.kavi.com [34.193.7.191]) (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 52EDBC001DB for ; Mon, 14 Aug 2023 11:29:50 +0000 (UTC) Received: from lists.oasis-open.org (oasis.ws5.connectedcommunity.org [10.110.1.242]) by ws5-mx01.kavi.com (Postfix) with ESMTP id 93E3671CAE for ; Mon, 14 Aug 2023 11:29:34 +0000 (UTC) Received: from lists.oasis-open.org (oasis-open.org [10.110.1.242]) by lists.oasis-open.org (Postfix) with ESMTP id 887839863F0 for ; Mon, 14 Aug 2023 11:29:34 +0000 (UTC) Received: from host09.ws5.connectedcommunity.org (host09.ws5.connectedcommunity.org [10.110.1.97]) by lists.oasis-open.org (Postfix) with QMQP id 7C82098633E; Mon, 14 Aug 2023 11:29:34 +0000 (UTC) Mailing-List: contact virtio-dev-help@lists.oasis-open.org; run by ezmlm List-ID: Sender: Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [10.110.1.242]) by lists.oasis-open.org (Postfix) with ESMTP id 54FD698657D; Mon, 14 Aug 2023 11:29:32 +0000 (UTC) X-Virus-Scanned: amavisd-new at kavi.com X-IronPort-AV: E=McAfee;i="6600,9927,10801"; a="351613534" X-IronPort-AV: E=Sophos;i="6.01,172,1684825200"; d="scan'208";a="351613534" X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10801"; a="803432880" X-IronPort-AV: E=Sophos;i="6.01,172,1684825200"; d="scan'208";a="803432880" From: Zhu Lingshan To: jasowang@redhat.com, mst@redhat.com, eperezma@redhat.com, cohuck@redhat.com Cc: virtio-comment@lists.oasis-open.org, virtio-dev@lists.oasis-open.org, Zhu Lingshan Date: Tue, 15 Aug 2023 03:29:03 +0800 Message-Id: <20230814192904.30062-5-lingshan.zhu@intel.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230814192904.30062-1-lingshan.zhu@intel.com> References: <20230814192904.30062-1-lingshan.zhu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [virtio-dev] [RFC PATCH 4/5] virtqueue: constraints for virtqueue state This commit specifies the constraints of the virtqueue state, and the actions should be taken by the device when SUSPEND and DRIVER_OK is set Signed-off-by: Jason Wang Signed-off-by: Zhu Lingshan --- content.tex | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/content.tex b/content.tex index 43bd5de..f6ac581 100644 --- a/content.tex +++ b/content.tex @@ -587,6 +587,37 @@ \subsection{\field{Used State} Field} See also \ref{sec:Packed Virtqueues / Driver and Device Ring Wrap Counters}. +\drivernormative{\subsection}{Virtqueue State}{Basic Facilities of a Virtio Device / Virtqueue State} + +If VIRTIO_F_QUEUE_STATE has been negotiated, the driver MUST set SUSPEND in \field{device status} +first before getting or setting Virtqueue State of any virtqueues. + +If VIRTIO_F_QUEUE_STATE has been negotiaged but VIRTIO_RING_F_PACKED not been negotiated, +the driver MUST NOT access \field{Used State} of any virtqueues, it should use the +used index in the used ring. + +\devicenormative{\subsection}{Virtqueue State}{Basic Facilities of a Virtio Device / Virtqueue State} + +If VIRTIO_F_QUEUE_STATE has been negotiated but SUSPEND is not set in \field{device status}, +the device MUST ignore any accesses against Virtqueue State of any virtqueues. + +When VIRTIO_F_QUEUE_STATE has been negotiated but VIRTIO_RING_F_PACKED is not, +the device MUST ignore any accesses against \field{Used State}. + +If VIRTIO_F_QUEUE_STATE has been negotiaged, the device MUST reset +the Virtqueue State of every virtqueue upon a reset. + +If VIRTIO_F_QUEUE_STATE and VIRTIO_RING_F_PACKED have been negotiaged, when SUSPEND is set, +the device MUST record the Virtqueue State of every enabled virtqueue +in \field{Available State} and \field{Used State} respectively, +and correspondingly restore the Virtqueue State of every enabled virtqueue +from \field{Avaiable State} and \field{Used State} when DRIVER_OK is set. + +If VIRTIO_F_QUEUE_STATE has been negotiated but VIRTIO_RING_F_PACKED has been not, when SUSPEND is set, +the device MUST record the available state of every enabled virtqueue in \field{Available State}, +and restore the available state of every enabled virtqueue from \field{Avaiable State} +when DRIVER_OK is set. + \input{admin.tex} \chapter{General Initialization And Device Operation}\label{sec:General Initialization And Device Operation} -- 2.35.3 --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org