From nobody Thu Dec 18 17:04:47 2025 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 06D15CDB483 for ; Wed, 18 Oct 2023 05:14:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229556AbjJRFOU (ORCPT ); Wed, 18 Oct 2023 01:14:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55468 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229455AbjJRFOT (ORCPT ); Wed, 18 Oct 2023 01:14:19 -0400 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5BC02B0 for ; Tue, 17 Oct 2023 22:14:17 -0700 (PDT) Received: from pps.filterd (m0246631.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 39HJwpYv015737; Wed, 18 Oct 2023 05:14:13 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id; s=corp-2023-03-30; bh=iUNSO/bYR9F/qcPJc1+lRcxI13H2YKnKpW68eyRCbEo=; b=0A+sh3TUnM6mQ083lKq3P5JZY8EsR8bCUvUfpFfFepiSG4V9WniDC8ua0ltWjsnAx8ih 6tzYReL5bbPR+PmCWR/me7WXd0n9Ug3T5HwoAACq3vGFwU3wJrrD1j2QWYji3Fyb02ZF obP4sgXYySfn4clhs1xunbcvKZDegr8N/R5yPyENWgU6yBlF50rROcn4a+24m1f3PiSB jmQrEBKzx5qLSl+iUe1Un6jlqSKMP3bsPlL4WND3lpt0kLSMyPSOpC/Q9eX+WibQ45Sm OZ0bP9ED+5YcJrquB6yzxyqjMhts0wn2OSKWOlE6iKjs+hvIqE0mx3tsT6LEIcjDcKmM cw== Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.appoci.oracle.com [147.154.114.232]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3tqjynepeu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 18 Oct 2023 05:14:13 +0000 Received: from pps.filterd (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 39I49CXR021681; Wed, 18 Oct 2023 05:14:12 GMT Received: from ban25x6uut24.us.oracle.com (ban25x6uut24.us.oracle.com [10.153.73.24]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTP id 3trg51ycja-1; Wed, 18 Oct 2023 05:14:12 +0000 From: Si-Wei Liu To: jasowang@redhat.com, mst@redhat.com, eperezma@redhat.com, sgarzare@redhat.com Cc: virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [RFC v2 PATCH] vdpa_sim: implement .reset_map support Date: Tue, 17 Oct 2023 22:11:33 -0700 Message-Id: <1697605893-30313-1-git-send-email-si-wei.liu@oracle.com> X-Mailer: git-send-email 1.8.3.1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-18_03,2023-10-17_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 adultscore=0 spamscore=0 mlxscore=0 phishscore=0 bulkscore=0 suspectscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310180044 X-Proofpoint-GUID: 6TIiuHvcMa6pdS6WnxcIN-uqP71R4NJO X-Proofpoint-ORIG-GUID: 6TIiuHvcMa6pdS6WnxcIN-uqP71R4NJO Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" RFC only. Not tested on vdpa-sim-blk with user virtual address. Works fine with vdpa-sim-net which uses physical address to map. This patch is based on top of [1]. [1] https://lore.kernel.org/virtualization/1696928580-7520-1-git-send-email= -si-wei.liu@oracle.com/ Signed-off-by: Si-Wei Liu Tested-by: Stefano Garzarella --- RFC v2: - initialize iotlb to passthrough mode in device add --- drivers/vdpa/vdpa_sim/vdpa_sim.c | 34 ++++++++++++++++++++++++-------- 1 file changed, 26 insertions(+), 8 deletions(-) diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_= sim.c index 76d41058add9..2a0a6042d61d 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c @@ -151,13 +151,6 @@ static void vdpasim_do_reset(struct vdpasim *vdpasim) &vdpasim->iommu_lock); } =20 - for (i =3D 0; i < vdpasim->dev_attr.nas; i++) { - vhost_iotlb_reset(&vdpasim->iommu[i]); - vhost_iotlb_add_range(&vdpasim->iommu[i], 0, ULONG_MAX, - 0, VHOST_MAP_RW); - vdpasim->iommu_pt[i] =3D true; - } - vdpasim->running =3D true; spin_unlock(&vdpasim->iommu_lock); =20 @@ -259,8 +252,12 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr= *dev_attr, if (!vdpasim->iommu_pt) goto err_iommu; =20 - for (i =3D 0; i < vdpasim->dev_attr.nas; i++) + for (i =3D 0; i < vdpasim->dev_attr.nas; i++) { vhost_iotlb_init(&vdpasim->iommu[i], max_iotlb_entries, 0); + vhost_iotlb_add_range(&vdpasim->iommu[i], 0, ULONG_MAX, 0, + VHOST_MAP_RW); + vdpasim->iommu_pt[i] =3D true; + } =20 for (i =3D 0; i < dev_attr->nvqs; i++) vringh_set_iotlb(&vdpasim->vqs[i].vring, &vdpasim->iommu[0], @@ -637,6 +634,25 @@ static int vdpasim_set_map(struct vdpa_device *vdpa, u= nsigned int asid, return ret; } =20 +static int vdpasim_reset_map(struct vdpa_device *vdpa, unsigned int asid) +{ + struct vdpasim *vdpasim =3D vdpa_to_sim(vdpa); + + if (asid >=3D vdpasim->dev_attr.nas) + return -EINVAL; + + spin_lock(&vdpasim->iommu_lock); + if (vdpasim->iommu_pt[asid]) + goto out; + vhost_iotlb_reset(&vdpasim->iommu[asid]); + vhost_iotlb_add_range(&vdpasim->iommu[asid], 0, ULONG_MAX, + 0, VHOST_MAP_RW); + vdpasim->iommu_pt[asid] =3D true; +out: + spin_unlock(&vdpasim->iommu_lock); + return 0; +} + static int vdpasim_bind_mm(struct vdpa_device *vdpa, struct mm_struct *mm) { struct vdpasim *vdpasim =3D vdpa_to_sim(vdpa); @@ -759,6 +775,7 @@ static const struct vdpa_config_ops vdpasim_config_ops = =3D { .set_group_asid =3D vdpasim_set_group_asid, .dma_map =3D vdpasim_dma_map, .dma_unmap =3D vdpasim_dma_unmap, + .reset_map =3D vdpasim_reset_map, .bind_mm =3D vdpasim_bind_mm, .unbind_mm =3D vdpasim_unbind_mm, .free =3D vdpasim_free, @@ -796,6 +813,7 @@ static const struct vdpa_config_ops vdpasim_batch_confi= g_ops =3D { .get_iova_range =3D vdpasim_get_iova_range, .set_group_asid =3D vdpasim_set_group_asid, .set_map =3D vdpasim_set_map, + .reset_map =3D vdpasim_reset_map, .bind_mm =3D vdpasim_bind_mm, .unbind_mm =3D vdpasim_unbind_mm, .free =3D vdpasim_free, --=20 2.39.3