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=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 34867C43461 for ; Fri, 23 Apr 2021 09:52:54 +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 C0FE36144D for ; Fri, 23 Apr 2021 09:52:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C0FE36144D 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 72AEC400D9; Fri, 23 Apr 2021 09:52:53 +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 8fHhQWjAnnq2; Fri, 23 Apr 2021 09:52:52 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp2.osuosl.org (Postfix) with ESMTP id 5E8DF40602; Fri, 23 Apr 2021 09:52:52 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 3315CC000F; Fri, 23 Apr 2021 09:52:52 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id DDBBDC000F; Fri, 23 Apr 2021 09:52:50 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id BB03940602; Fri, 23 Apr 2021 09:52:50 +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 qZOByano3fI8; Fri, 23 Apr 2021 09:52:50 +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 0EE3640613; Fri, 23 Apr 2021 09:52:50 +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 94D261684; Fri, 23 Apr 2021 02:52:49 -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 6D48D3F774; Fri, 23 Apr 2021 02:52:45 -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 11/11] iommu/virtio: Add support to send page response Date: Fri, 23 Apr 2021 15:21:47 +0530 Message-Id: <20210423095147.27922-12-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" Add page_response iommu ops callback to send page response to the device that generated io page fault. Signed-off-by: Vivek Gautam --- drivers/iommu/virtio-iommu.c | 47 ++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index 08f1294baeab..6d62d9eae452 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -1778,6 +1778,52 @@ static int viommu_of_xlate(struct device *dev, struct of_phandle_args *args) return iommu_fwspec_add_ids(dev, args->args, 1); } +static int viommu_page_response(struct device *dev, + struct iommu_fault_event *evt, + struct iommu_page_response *resp) +{ + struct iommu_domain *domain = iommu_get_domain_for_dev(dev); + struct viommu_domain *vdomain = to_viommu_domain(domain); + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + struct viommu_endpoint *vdev = dev_iommu_priv_get(dev); + struct viommu_dev *viommu = vdev->viommu; + bool pasid_valid = resp->flags & IOMMU_PAGE_RESP_PASID_VALID; + struct virtio_iommu_req_page_resp req = { + .head.type = VIRTIO_IOMMU_T_PAGE_RESP, + .domain = cpu_to_le32(vdomain->id), + .endpoint = cpu_to_le32(fwspec->ids[0]), + }; + + if (vdev->pri_supported) { + bool needs_pasid = (evt->fault.prm.flags & + IOMMU_FAULT_PAGE_RESPONSE_NEEDS_PASID); + + req.pasid_valid = needs_pasid && pasid_valid; + req.flags = cpu_to_le32((needs_pasid && pasid_valid) ? + VIRTIO_IOMMU_PAGE_RESP_PASID_VALID : 0); + req.pasid = cpu_to_le32(resp->pasid); + req.grpid = cpu_to_le32(resp->grpid); + + switch (resp->code) { + case IOMMU_PAGE_RESP_FAILURE: + req.resp_code = cpu_to_le16(VIRTIO_IOMMU_PAGE_RESP_FAILURE); + break; + case IOMMU_PAGE_RESP_INVALID: + req.resp_code = cpu_to_le16(VIRTIO_IOMMU_PAGE_RESP_INVALID); + break; + case IOMMU_PAGE_RESP_SUCCESS: + req.resp_code = cpu_to_le16(VIRTIO_IOMMU_PAGE_RESP_SUCCESS); + break; + default: + return -EINVAL; + } + } else { + return -ENODEV; + } + + return viommu_send_req_sync(viommu, &req, sizeof(req)); +} + static u32 viommu_sva_get_pasid(struct iommu_sva *handle) { struct viommu_sva_bond *bond = sva_to_viommu_bond(handle); @@ -2155,6 +2201,7 @@ static struct iommu_ops viommu_ops = { .sva_bind = viommu_sva_bind, .sva_unbind = viommu_sva_unbind, .sva_get_pasid = viommu_sva_get_pasid, + .page_response = viommu_page_response, }; static int viommu_init_vqs(struct viommu_dev *viommu) -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu