From patchwork Wed Jul 10 12:55:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonah Palmer X-Patchwork-Id: 13729261 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 026CEC3DA42 for ; Wed, 10 Jul 2024 12:57:02 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sRWrO-00010F-P5; Wed, 10 Jul 2024 08:55:50 -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 1sRWrM-0000yA-Jn; Wed, 10 Jul 2024 08:55:48 -0400 Received: from mx0b-00069f02.pphosted.com ([205.220.177.32]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sRWrK-0005fP-I5; 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Wed, 10 Jul 2024 12:55:28 +0000 (GMT) Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 46ABbjXq007488; Wed, 10 Jul 2024 12:55:27 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 407tu4r0fb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 10 Jul 2024 12:55:27 +0000 Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 46ACtQtS015847; Wed, 10 Jul 2024 12:55:27 GMT Received: from jonah-ol8.us.oracle.com (dhcp-10-65-182-124.vpn.oracle.com [10.65.182.124]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 407tu4r0e4-2; Wed, 10 Jul 2024 12:55:27 +0000 From: Jonah Palmer To: qemu-devel@nongnu.org Cc: mst@redhat.com, raphael@enfabrica.net, kwolf@redhat.com, hreitz@redhat.com, jasowang@redhat.com, pbonzini@redhat.com, fam@euphon.net, eperezma@redhat.com, stefanha@redhat.com, qemu-block@nongnu.org, schalla@marvell.com, leiyang@redhat.com, virtio-fs@lists.linux.dev, si-wei.liu@oracle.com, boris.ostrovsky@oracle.com, jonah.palmer@oracle.com Subject: [PATCH v4 1/6] virtio: Add bool to VirtQueueElement Date: Wed, 10 Jul 2024 08:55:14 -0400 Message-ID: <20240710125522.4168043-2-jonah.palmer@oracle.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20240710125522.4168043-1-jonah.palmer@oracle.com> References: <20240710125522.4168043-1-jonah.palmer@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-10_08,2024-07-10_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 mlxlogscore=999 mlxscore=0 phishscore=0 spamscore=0 adultscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2406180000 definitions=main-2407100089 X-Proofpoint-ORIG-GUID: xraxNThPA4OGfJLhYzUPhxSCx4o6tehO X-Proofpoint-GUID: xraxNThPA4OGfJLhYzUPhxSCx4o6tehO Received-SPF: pass client-ip=205.220.177.32; envelope-from=jonah.palmer@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add the boolean 'in_order_filled' member to the VirtQueueElement structure. The use of this boolean will signify whether the element has been processed and is ready to be flushed (so long as the element is in-order). This boolean is used to support the VIRTIO_F_IN_ORDER feature. Reviewed-by: Eugenio Pérez Signed-off-by: Jonah Palmer --- include/hw/virtio/virtio.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index 7512afbc84..fdc827f82e 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -69,6 +69,8 @@ typedef struct VirtQueueElement unsigned int ndescs; unsigned int out_num; unsigned int in_num; + /* Element has been processed (VIRTIO_F_IN_ORDER) */ + bool in_order_filled; hwaddr *in_addr; hwaddr *out_addr; struct iovec *in_sg; From patchwork Wed Jul 10 12:55:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonah Palmer X-Patchwork-Id: 13729260 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 3D538C3DA42 for ; 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Wed, 10 Jul 2024 12:55:28 +0000 Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 46ACtQtU015847; Wed, 10 Jul 2024 12:55:28 GMT Received: from jonah-ol8.us.oracle.com (dhcp-10-65-182-124.vpn.oracle.com [10.65.182.124]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 407tu4r0e4-3; Wed, 10 Jul 2024 12:55:28 +0000 From: Jonah Palmer To: qemu-devel@nongnu.org Cc: mst@redhat.com, raphael@enfabrica.net, kwolf@redhat.com, hreitz@redhat.com, jasowang@redhat.com, pbonzini@redhat.com, fam@euphon.net, eperezma@redhat.com, stefanha@redhat.com, qemu-block@nongnu.org, schalla@marvell.com, leiyang@redhat.com, virtio-fs@lists.linux.dev, si-wei.liu@oracle.com, boris.ostrovsky@oracle.com, jonah.palmer@oracle.com Subject: [PATCH v4 2/6] virtio: virtqueue_pop - VIRTIO_F_IN_ORDER support Date: Wed, 10 Jul 2024 08:55:15 -0400 Message-ID: <20240710125522.4168043-3-jonah.palmer@oracle.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20240710125522.4168043-1-jonah.palmer@oracle.com> References: <20240710125522.4168043-1-jonah.palmer@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-10_08,2024-07-10_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 mlxlogscore=999 mlxscore=0 phishscore=0 spamscore=0 adultscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2406180000 definitions=main-2407100089 X-Proofpoint-ORIG-GUID: HGtkVSppUvPiLra5Ak29BJcRZXm34QMi X-Proofpoint-GUID: HGtkVSppUvPiLra5Ak29BJcRZXm34QMi Received-SPF: pass client-ip=205.220.165.32; envelope-from=jonah.palmer@oracle.com; helo=mx0a-00069f02.pphosted.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_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add VIRTIO_F_IN_ORDER feature support in virtqueue_split_pop and virtqueue_packed_pop. VirtQueueElements popped from the available/descritpor ring are added to the VirtQueue's used_elems array in-order and in the same fashion as they would be added the used and descriptor rings, respectively. This will allow us to keep track of the current order, what elements have been written, as well as an element's essential data after being processed. Reviewed-by: Eugenio Pérez Signed-off-by: Jonah Palmer --- last_avail_idx can grow well beyond vring.num, so for this reason we need to keep the index bound between 0 and vring.num-1 for the split VQ case. hw/virtio/virtio.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 583a224163..98eb601b09 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -1505,7 +1505,7 @@ static void *virtqueue_alloc_element(size_t sz, unsigned out_num, unsigned in_nu static void *virtqueue_split_pop(VirtQueue *vq, size_t sz) { - unsigned int i, head, max; + unsigned int i, head, max, idx; VRingMemoryRegionCaches *caches; MemoryRegionCache indirect_desc_cache; MemoryRegionCache *desc_cache; @@ -1629,6 +1629,13 @@ static void *virtqueue_split_pop(VirtQueue *vq, size_t sz) elem->in_sg[i] = iov[out_num + i]; } + if (virtio_vdev_has_feature(vdev, VIRTIO_F_IN_ORDER)) { + idx = (vq->last_avail_idx - 1) % vq->vring.num; + vq->used_elems[idx].index = elem->index; + vq->used_elems[idx].len = elem->len; + vq->used_elems[idx].ndescs = elem->ndescs; + } + vq->inuse++; trace_virtqueue_pop(vq, elem, elem->in_num, elem->out_num); @@ -1762,6 +1769,13 @@ static void *virtqueue_packed_pop(VirtQueue *vq, size_t sz) elem->index = id; elem->ndescs = (desc_cache == &indirect_desc_cache) ? 1 : elem_entries; + + if (virtio_vdev_has_feature(vdev, VIRTIO_F_IN_ORDER)) { + vq->used_elems[vq->last_avail_idx].index = elem->index; + vq->used_elems[vq->last_avail_idx].len = elem->len; + vq->used_elems[vq->last_avail_idx].ndescs = elem->ndescs; + } + vq->last_avail_idx += elem->ndescs; vq->inuse += elem->ndescs; From patchwork Wed Jul 10 12:55:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonah Palmer X-Patchwork-Id: 13729263 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 2CAECC3DA41 for ; 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Wed, 10 Jul 2024 12:55:29 +0000 Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 46ACtQtW015847; Wed, 10 Jul 2024 12:55:29 GMT Received: from jonah-ol8.us.oracle.com (dhcp-10-65-182-124.vpn.oracle.com [10.65.182.124]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 407tu4r0e4-4; Wed, 10 Jul 2024 12:55:29 +0000 From: Jonah Palmer To: qemu-devel@nongnu.org Cc: mst@redhat.com, raphael@enfabrica.net, kwolf@redhat.com, hreitz@redhat.com, jasowang@redhat.com, pbonzini@redhat.com, fam@euphon.net, eperezma@redhat.com, stefanha@redhat.com, qemu-block@nongnu.org, schalla@marvell.com, leiyang@redhat.com, virtio-fs@lists.linux.dev, si-wei.liu@oracle.com, boris.ostrovsky@oracle.com, jonah.palmer@oracle.com Subject: [PATCH v4 3/6] virtio: virtqueue_ordered_fill - VIRTIO_F_IN_ORDER support Date: Wed, 10 Jul 2024 08:55:16 -0400 Message-ID: <20240710125522.4168043-4-jonah.palmer@oracle.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20240710125522.4168043-1-jonah.palmer@oracle.com> References: <20240710125522.4168043-1-jonah.palmer@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-10_08,2024-07-10_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 mlxlogscore=999 mlxscore=0 phishscore=0 spamscore=0 adultscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2406180000 definitions=main-2407100089 X-Proofpoint-GUID: TyggrZPggYAxiOiqLF_pHJiuu4VxttDS X-Proofpoint-ORIG-GUID: TyggrZPggYAxiOiqLF_pHJiuu4VxttDS Received-SPF: pass client-ip=205.220.165.32; envelope-from=jonah.palmer@oracle.com; helo=mx0a-00069f02.pphosted.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_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add VIRTIO_F_IN_ORDER feature support for the virtqueue_fill operation. The goal of the virtqueue_ordered_fill operation when the VIRTIO_F_IN_ORDER feature has been negotiated is to search for this now-used element, set its length, and mark the element as filled in the VirtQueue's used_elems array. By marking the element as filled, it will indicate that this element has been processed and is ready to be flushed, so long as the element is in-order. Reviewed-by: Eugenio Pérez Signed-off-by: Jonah Palmer --- hw/virtio/virtio.c | 44 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 98eb601b09..0000a7b41c 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -872,6 +872,46 @@ static void virtqueue_packed_fill(VirtQueue *vq, const VirtQueueElement *elem, vq->used_elems[idx].ndescs = elem->ndescs; } +static void virtqueue_ordered_fill(VirtQueue *vq, const VirtQueueElement *elem, + unsigned int len) +{ + unsigned int i, steps, max_steps; + + i = vq->used_idx % vq->vring.num; + steps = 0; + /* + * We shouldn't need to increase 'i' by more than the distance + * between used_idx and last_avail_idx. + */ + max_steps = (vq->last_avail_idx - vq->used_idx) % vq->vring.num; + + /* Search for element in vq->used_elems */ + while (steps <= max_steps) { + /* Found element, set length and mark as filled */ + if (vq->used_elems[i].index == elem->index) { + vq->used_elems[i].len = len; + vq->used_elems[i].in_order_filled = true; + break; + } + + i += vq->used_elems[i].ndescs; + steps += vq->used_elems[i].ndescs; + + if (i >= vq->vring.num) { + i -= vq->vring.num; + } + } + + /* + * We should be able to find a matching VirtQueueElement in + * used_elems. If we don't, this is an error. + */ + if (steps >= max_steps) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: %s cannot fill buffer id %u\n", + __func__, vq->vdev->name, elem->index); + } +} + static void virtqueue_packed_fill_desc(VirtQueue *vq, const VirtQueueElement *elem, unsigned int idx, @@ -922,7 +962,9 @@ void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem, return; } - if (virtio_vdev_has_feature(vq->vdev, VIRTIO_F_RING_PACKED)) { + if (virtio_vdev_has_feature(vq->vdev, VIRTIO_F_IN_ORDER)) { + virtqueue_ordered_fill(vq, elem, len); + } else if (virtio_vdev_has_feature(vq->vdev, VIRTIO_F_RING_PACKED)) { virtqueue_packed_fill(vq, elem, len, idx); } else { virtqueue_split_fill(vq, elem, len, idx); From patchwork Wed Jul 10 12:55:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonah Palmer X-Patchwork-Id: 13729269 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 614F7C3DA42 for ; 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Wed, 10 Jul 2024 12:55:30 +0000 Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 46ACtQtY015847; Wed, 10 Jul 2024 12:55:30 GMT Received: from jonah-ol8.us.oracle.com (dhcp-10-65-182-124.vpn.oracle.com [10.65.182.124]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 407tu4r0e4-5; Wed, 10 Jul 2024 12:55:30 +0000 From: Jonah Palmer To: qemu-devel@nongnu.org Cc: mst@redhat.com, raphael@enfabrica.net, kwolf@redhat.com, hreitz@redhat.com, jasowang@redhat.com, pbonzini@redhat.com, fam@euphon.net, eperezma@redhat.com, stefanha@redhat.com, qemu-block@nongnu.org, schalla@marvell.com, leiyang@redhat.com, virtio-fs@lists.linux.dev, si-wei.liu@oracle.com, boris.ostrovsky@oracle.com, jonah.palmer@oracle.com Subject: [PATCH v4 4/6] virtio: virtqueue_ordered_flush - VIRTIO_F_IN_ORDER support Date: Wed, 10 Jul 2024 08:55:17 -0400 Message-ID: <20240710125522.4168043-5-jonah.palmer@oracle.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20240710125522.4168043-1-jonah.palmer@oracle.com> References: <20240710125522.4168043-1-jonah.palmer@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-10_08,2024-07-10_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 mlxlogscore=999 mlxscore=0 phishscore=0 spamscore=0 adultscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2406180000 definitions=main-2407100089 X-Proofpoint-ORIG-GUID: XQGfg-myqkeHFrq-n_D9AXFwd4EOlzh5 X-Proofpoint-GUID: XQGfg-myqkeHFrq-n_D9AXFwd4EOlzh5 Received-SPF: pass client-ip=205.220.165.32; envelope-from=jonah.palmer@oracle.com; helo=mx0a-00069f02.pphosted.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_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add VIRTIO_F_IN_ORDER feature support for the virtqueue_flush operation. The goal of the virtqueue_ordered_flush operation when the VIRTIO_F_IN_ORDER feature has been negotiated is to write elements to the used/descriptor ring in-order and then update used_idx. The function iterates through the VirtQueueElement used_elems array in-order starting at vq->used_idx. If the element is valid (filled), the element is written to the used/descriptor ring. This process continues until we find an invalid (not filled) element. For packed VQs, the first entry (at vq->used_idx) is written to the descriptor ring last so the guest doesn't see any invalid descriptors. If any elements were written, the used_idx is updated. Signed-off-by: Jonah Palmer Acked-by: Eugenio Pérez --- Several fixes here for the split VQ case: - Ensure all previous write operations to buffers are completed before updating the used_idx (via smp_wmb()). - used_elems index 'i' should be incremented by the number of descriptors in the current element we just processed, not by the running total of descriptors already seen. This would've caused batched operations to miss ordered elements when looping through the used_elems array. - Do not keep the VQ's used_idx bound between 0 and vring.num-1 when setting it via vring_used_idx_set(). While the packed VQ case naturally keeps used_idx bound between 0 and vring.num-1, the split VQ case cannot. This is because used_idx is used to compare the current event index with the new and old used indices to decide if a notification is necessary (see virtio_split_should_notify()). This comparison expects used_idx to be between 0 and 65535, not 0 and vring.num-1. hw/virtio/virtio.c | 70 +++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 69 insertions(+), 1 deletion(-) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 0000a7b41c..b419d8d6e7 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -1023,6 +1023,72 @@ static void virtqueue_packed_flush(VirtQueue *vq, unsigned int count) } } +static void virtqueue_ordered_flush(VirtQueue *vq) +{ + unsigned int i = vq->used_idx % vq->vring.num; + unsigned int ndescs = 0; + uint16_t old = vq->used_idx; + uint16_t new; + bool packed; + VRingUsedElem uelem; + + packed = virtio_vdev_has_feature(vq->vdev, VIRTIO_F_RING_PACKED); + + if (packed) { + if (unlikely(!vq->vring.desc)) { + return; + } + } else if (unlikely(!vq->vring.used)) { + return; + } + + /* First expected in-order element isn't ready, nothing to do */ + if (!vq->used_elems[i].in_order_filled) { + return; + } + + /* Search for filled elements in-order */ + while (vq->used_elems[i].in_order_filled) { + /* + * First entry for packed VQs is written last so the guest + * doesn't see invalid descriptors. + */ + if (packed && i != vq->used_idx) { + virtqueue_packed_fill_desc(vq, &vq->used_elems[i], ndescs, false); + } else if (!packed) { + uelem.id = vq->used_elems[i].index; + uelem.len = vq->used_elems[i].len; + vring_used_write(vq, &uelem, i); + } + + vq->used_elems[i].in_order_filled = false; + ndescs += vq->used_elems[i].ndescs; + i += vq->used_elems[i].ndescs; + if (i >= vq->vring.num) { + i -= vq->vring.num; + } + } + + if (packed) { + virtqueue_packed_fill_desc(vq, &vq->used_elems[vq->used_idx], 0, true); + vq->used_idx += ndescs; + if (vq->used_idx >= vq->vring.num) { + vq->used_idx -= vq->vring.num; + vq->used_wrap_counter ^= 1; + vq->signalled_used_valid = false; + } + } else { + /* Make sure buffer is written before we update index. */ + smp_wmb(); + new = old + ndescs; + vring_used_idx_set(vq, new); + if (unlikely((int16_t)(new - vq->signalled_used) < (uint16_t)(new - old))) { + vq->signalled_used_valid = false; + } + } + vq->inuse -= ndescs; +} + void virtqueue_flush(VirtQueue *vq, unsigned int count) { if (virtio_device_disabled(vq->vdev)) { @@ -1030,7 +1096,9 @@ void virtqueue_flush(VirtQueue *vq, unsigned int count) return; } - if (virtio_vdev_has_feature(vq->vdev, VIRTIO_F_RING_PACKED)) { + if (virtio_vdev_has_feature(vq->vdev, VIRTIO_F_IN_ORDER)) { + virtqueue_ordered_flush(vq); + } else if (virtio_vdev_has_feature(vq->vdev, VIRTIO_F_RING_PACKED)) { virtqueue_packed_flush(vq, count); } else { virtqueue_split_flush(vq, count); From patchwork Wed Jul 10 12:55:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonah Palmer X-Patchwork-Id: 13729265 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B0F6BC3DA42 for ; Wed, 10 Jul 2024 12:57:37 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sRWrX-0001XD-Oc; 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Wed, 10 Jul 2024 12:55:43 +0000 (GMT) Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 46AC53Ts007496; Wed, 10 Jul 2024 12:55:31 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 407tu4r0j2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 10 Jul 2024 12:55:31 +0000 Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 46ACtQta015847; Wed, 10 Jul 2024 12:55:31 GMT Received: from jonah-ol8.us.oracle.com (dhcp-10-65-182-124.vpn.oracle.com [10.65.182.124]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 407tu4r0e4-6; Wed, 10 Jul 2024 12:55:31 +0000 To: qemu-devel@nongnu.org Cc: mst@redhat.com, raphael@enfabrica.net, kwolf@redhat.com, hreitz@redhat.com, jasowang@redhat.com, pbonzini@redhat.com, fam@euphon.net, eperezma@redhat.com, stefanha@redhat.com, qemu-block@nongnu.org, schalla@marvell.com, leiyang@redhat.com, virtio-fs@lists.linux.dev, si-wei.liu@oracle.com, boris.ostrovsky@oracle.com, jonah.palmer@oracle.com Subject: [PATCH v4 5/6] vhost, vhost-user: Add VIRTIO_F_IN_ORDER to vhost feature bits Date: Wed, 10 Jul 2024 08:55:18 -0400 Message-ID: <20240710125522.4168043-6-jonah.palmer@oracle.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20240710125522.4168043-1-jonah.palmer@oracle.com> References: <20240710125522.4168043-1-jonah.palmer@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-10_08,2024-07-10_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 mlxlogscore=999 mlxscore=0 phishscore=0 spamscore=0 adultscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2406180000 definitions=main-2407100089 X-Proofpoint-ORIG-GUID: AUhEHxtwr2MqgO0SbdrpMZmSyV8r3-D9 X-Proofpoint-GUID: AUhEHxtwr2MqgO0SbdrpMZmSyV8r3-D9 Received-SPF: pass client-ip=205.220.165.32; envelope-from=jonah.palmer@oracle.com; helo=mx0a-00069f02.pphosted.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_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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: , Reply-to: Jonah Palmer X-Patchwork-Original-From: Jonah Palmer via From: Jonah Palmer Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add support for the VIRTIO_F_IN_ORDER feature across a variety of vhost devices. The inclusion of VIRTIO_F_IN_ORDER in the feature bits arrays for these devices ensures that the backend is capable of offering and providing support for this feature, and that it can be disabled if the backend does not support it. Acked-by: Eugenio Pérez Signed-off-by: Jonah Palmer --- hw/block/vhost-user-blk.c | 1 + hw/net/vhost_net.c | 2 ++ hw/scsi/vhost-scsi.c | 1 + hw/scsi/vhost-user-scsi.c | 1 + hw/virtio/vhost-user-fs.c | 1 + hw/virtio/vhost-user-vsock.c | 1 + net/vhost-vdpa.c | 1 + 7 files changed, 8 insertions(+) diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c index fdbc30b9ce..5b7f46bbb0 100644 --- a/hw/block/vhost-user-blk.c +++ b/hw/block/vhost-user-blk.c @@ -51,6 +51,7 @@ static const int user_feature_bits[] = { VIRTIO_F_RING_PACKED, VIRTIO_F_IOMMU_PLATFORM, VIRTIO_F_RING_RESET, + VIRTIO_F_IN_ORDER, VIRTIO_F_NOTIFICATION_DATA, VHOST_INVALID_FEATURE_BIT }; diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c index 18898afe81..a788e6937e 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -48,6 +48,7 @@ static const int kernel_feature_bits[] = { VIRTIO_F_IOMMU_PLATFORM, VIRTIO_F_RING_PACKED, VIRTIO_F_RING_RESET, + VIRTIO_F_IN_ORDER, VIRTIO_F_NOTIFICATION_DATA, VIRTIO_NET_F_HASH_REPORT, VHOST_INVALID_FEATURE_BIT @@ -78,6 +79,7 @@ static const int user_feature_bits[] = { VIRTIO_F_IOMMU_PLATFORM, VIRTIO_F_RING_PACKED, VIRTIO_F_RING_RESET, + VIRTIO_F_IN_ORDER, VIRTIO_NET_F_RSS, VIRTIO_NET_F_HASH_REPORT, VIRTIO_NET_F_GUEST_USO4, diff --git a/hw/scsi/vhost-scsi.c b/hw/scsi/vhost-scsi.c index 3d5fe0994d..49cff2a0cb 100644 --- a/hw/scsi/vhost-scsi.c +++ b/hw/scsi/vhost-scsi.c @@ -38,6 +38,7 @@ static const int kernel_feature_bits[] = { VIRTIO_RING_F_EVENT_IDX, VIRTIO_SCSI_F_HOTPLUG, VIRTIO_F_RING_RESET, + VIRTIO_F_IN_ORDER, VIRTIO_F_NOTIFICATION_DATA, VHOST_INVALID_FEATURE_BIT }; diff --git a/hw/scsi/vhost-user-scsi.c b/hw/scsi/vhost-user-scsi.c index cc91ade525..55e4be5b34 100644 --- a/hw/scsi/vhost-user-scsi.c +++ b/hw/scsi/vhost-user-scsi.c @@ -36,6 +36,7 @@ static const int user_feature_bits[] = { VIRTIO_RING_F_EVENT_IDX, VIRTIO_SCSI_F_HOTPLUG, VIRTIO_F_RING_RESET, + VIRTIO_F_IN_ORDER, VIRTIO_F_NOTIFICATION_DATA, VHOST_INVALID_FEATURE_BIT }; diff --git a/hw/virtio/vhost-user-fs.c b/hw/virtio/vhost-user-fs.c index ae48cc1c96..32ee7f496d 100644 --- a/hw/virtio/vhost-user-fs.c +++ b/hw/virtio/vhost-user-fs.c @@ -33,6 +33,7 @@ static const int user_feature_bits[] = { VIRTIO_F_RING_PACKED, VIRTIO_F_IOMMU_PLATFORM, VIRTIO_F_RING_RESET, + VIRTIO_F_IN_ORDER, VIRTIO_F_NOTIFICATION_DATA, VHOST_INVALID_FEATURE_BIT }; diff --git a/hw/virtio/vhost-user-vsock.c b/hw/virtio/vhost-user-vsock.c index 802b44a07d..da3b0e0229 100644 --- a/hw/virtio/vhost-user-vsock.c +++ b/hw/virtio/vhost-user-vsock.c @@ -21,6 +21,7 @@ static const int user_feature_bits[] = { VIRTIO_RING_F_INDIRECT_DESC, VIRTIO_RING_F_EVENT_IDX, VIRTIO_F_NOTIFY_ON_EMPTY, + VIRTIO_F_IN_ORDER, VIRTIO_F_NOTIFICATION_DATA, VHOST_INVALID_FEATURE_BIT }; diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index daa38428c5..03457ead66 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -62,6 +62,7 @@ const int vdpa_feature_bits[] = { VIRTIO_F_RING_PACKED, VIRTIO_F_RING_RESET, VIRTIO_F_VERSION_1, + VIRTIO_F_IN_ORDER, VIRTIO_F_NOTIFICATION_DATA, VIRTIO_NET_F_CSUM, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, From patchwork Wed Jul 10 12:55:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonah Palmer X-Patchwork-Id: 13729262 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id CC913C3DA42 for ; Wed, 10 Jul 2024 12:57:21 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sRWrT-0001G3-BO; 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Wed, 10 Jul 2024 12:55:38 +0000 (GMT) Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 46ABbjXt007488; Wed, 10 Jul 2024 12:55:33 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 407tu4r0jv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 10 Jul 2024 12:55:32 +0000 Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 46ACtQtc015847; Wed, 10 Jul 2024 12:55:32 GMT Received: from jonah-ol8.us.oracle.com (dhcp-10-65-182-124.vpn.oracle.com [10.65.182.124]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 407tu4r0e4-7; Wed, 10 Jul 2024 12:55:32 +0000 From: Jonah Palmer To: qemu-devel@nongnu.org Cc: mst@redhat.com, raphael@enfabrica.net, kwolf@redhat.com, hreitz@redhat.com, jasowang@redhat.com, pbonzini@redhat.com, fam@euphon.net, eperezma@redhat.com, stefanha@redhat.com, qemu-block@nongnu.org, schalla@marvell.com, leiyang@redhat.com, virtio-fs@lists.linux.dev, si-wei.liu@oracle.com, boris.ostrovsky@oracle.com, jonah.palmer@oracle.com Subject: [PATCH v4 6/6] virtio: Add VIRTIO_F_IN_ORDER property definition Date: Wed, 10 Jul 2024 08:55:19 -0400 Message-ID: <20240710125522.4168043-7-jonah.palmer@oracle.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20240710125522.4168043-1-jonah.palmer@oracle.com> References: <20240710125522.4168043-1-jonah.palmer@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-10_08,2024-07-10_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 mlxlogscore=999 mlxscore=0 phishscore=0 spamscore=0 adultscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2406180000 definitions=main-2407100089 X-Proofpoint-ORIG-GUID: 50FXEpDSXjaIjezBVeOs1s89Ue0uP9gO X-Proofpoint-GUID: 50FXEpDSXjaIjezBVeOs1s89Ue0uP9gO Received-SPF: pass client-ip=205.220.165.32; envelope-from=jonah.palmer@oracle.com; helo=mx0a-00069f02.pphosted.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_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Extend the virtio device property definitions to include the VIRTIO_F_IN_ORDER feature. The default state of this feature is disabled, allowing it to be explicitly enabled where it's supported. Acked-by: Eugenio Pérez Signed-off-by: Jonah Palmer --- include/hw/virtio/virtio.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index fdc827f82e..d2a1938757 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -373,7 +373,9 @@ typedef struct VirtIORNGConf VirtIORNGConf; DEFINE_PROP_BIT64("packed", _state, _field, \ VIRTIO_F_RING_PACKED, false), \ DEFINE_PROP_BIT64("queue_reset", _state, _field, \ - VIRTIO_F_RING_RESET, true) + VIRTIO_F_RING_RESET, true), \ + DEFINE_PROP_BIT64("in_order", _state, _field, \ + VIRTIO_F_IN_ORDER, false) hwaddr virtio_queue_get_desc_addr(VirtIODevice *vdev, int n); bool virtio_queue_enabled_legacy(VirtIODevice *vdev, int n);