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 X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 3FC0AC43461 for ; Fri, 23 Apr 2021 09:52:12 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (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 B4AD6613C3 for ; Fri, 23 Apr 2021 09:52:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B4AD6613C3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 50A5A4060B; Fri, 23 Apr 2021 09:52:11 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jXsX5kclU418; Fri, 23 Apr 2021 09:52:10 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp2.osuosl.org (Postfix) with ESMTP id 4BA8740610; Fri, 23 Apr 2021 09:52:10 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 36719C001A; Fri, 23 Apr 2021 09:52:10 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [IPv6:2605:bc80:3010::133]) by lists.linuxfoundation.org (Postfix) with ESMTP id B3C9AC000B; Fri, 23 Apr 2021 09:52:09 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 9089140618; Fri, 23 Apr 2021 09:52:09 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DjWjZ5pE3Vm3; Fri, 23 Apr 2021 09:52:08 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp2.osuosl.org (Postfix) with ESMTP id D98EE40602; Fri, 23 Apr 2021 09:52:08 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1FAEE1474; Fri, 23 Apr 2021 02:52:08 -0700 (PDT) Received: from usa.arm.com (a074945.blr.arm.com [10.162.16.71]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EBF283F774; Fri, 23 Apr 2021 02:52:03 -0700 (PDT) From: Vivek Gautam To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, virtualization@lists.linux-foundation.org Subject: [PATCH RFC v1 02/11] iommu/virtio: Maintain a list of endpoints served by viommu_dev Date: Fri, 23 Apr 2021 15:21:38 +0530 Message-Id: <20210423095147.27922-3-vivek.gautam@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210423095147.27922-1-vivek.gautam@arm.com> References: <20210423095147.27922-1-vivek.gautam@arm.com> Cc: jean-philippe@linaro.org, kevin.tian@intel.com, mst@redhat.com, will.deacon@arm.com, Vivek Gautam , robin.murphy@arm.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Keeping a record of list of endpoints that are served by the virtio-iommu device would help in redirecting the requests of page faults to the correct endpoint device to handle such requests. Signed-off-by: Vivek Gautam --- drivers/iommu/virtio-iommu.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index 50039070e2aa..c970f386f031 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -48,6 +48,7 @@ struct viommu_dev { spinlock_t request_lock; struct list_head requests; void *evts; + struct list_head endpoints; /* Device configuration */ struct iommu_domain_geometry geometry; @@ -115,6 +116,12 @@ struct viommu_endpoint { void *pgtf; }; +struct viommu_ep_entry { + u32 eid; + struct viommu_endpoint *vdev; + struct list_head list; +}; + struct viommu_request { struct list_head list; void *writeback; @@ -573,6 +580,7 @@ static int viommu_probe_endpoint(struct viommu_dev *viommu, struct device *dev) size_t probe_len; struct virtio_iommu_req_probe *probe; struct virtio_iommu_probe_property *prop; + struct viommu_ep_entry *ep; struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct viommu_endpoint *vdev = dev_iommu_priv_get(dev); @@ -640,6 +648,18 @@ static int viommu_probe_endpoint(struct viommu_dev *viommu, struct device *dev) prop = (void *)probe->properties + cur; type = le16_to_cpu(prop->type) & VIRTIO_IOMMU_PROBE_T_MASK; } + if (ret) + goto out_free; + + ep = kzalloc(sizeof(*ep), GFP_KERNEL); + if (!ep) { + ret = -ENOMEM; + goto out_free; + } + ep->eid = probe->endpoint; + ep->vdev = vdev; + + list_add(&ep->list, &viommu->endpoints); out_free: kfree(probe); @@ -1649,6 +1669,7 @@ static int viommu_probe(struct virtio_device *vdev) viommu->dev = dev; viommu->vdev = vdev; INIT_LIST_HEAD(&viommu->requests); + INIT_LIST_HEAD(&viommu->endpoints); ret = viommu_init_vqs(viommu); if (ret) -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu