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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 3B896C433B4 for ; Fri, 23 Apr 2021 09:52:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 019EC613C3 for ; Fri, 23 Apr 2021 09:52:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242086AbhDWJxX (ORCPT ); Fri, 23 Apr 2021 05:53:23 -0400 Received: from foss.arm.com ([217.140.110.172]:60940 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242073AbhDWJxV (ORCPT ); Fri, 23 Apr 2021 05:53:21 -0400 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 009CB1682; Fri, 23 Apr 2021 02:52:45 -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 CD2393F774; Fri, 23 Apr 2021 02:52:40 -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 Cc: joro@8bytes.org, will.deacon@arm.com, mst@redhat.com, robin.murphy@arm.com, jean-philippe@linaro.org, eric.auger@redhat.com, kevin.tian@intel.com, jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com, Lorenzo.Pieralisi@arm.com, shameerali.kolothum.thodi@huawei.com, Vivek Gautam Subject: [PATCH RFC v1 10/11] uapi/virtio-iommu: Add a new request type to send page response Date: Fri, 23 Apr 2021 15:21:46 +0530 Message-Id: <20210423095147.27922-11-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> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Once the page faults are handled, the response has to be sent to virtio-iommu backend, from where it can be sent to the host to prepare the response to a generated io page fault by the device. Add a new virt-queue request type to handle this. Signed-off-by: Vivek Gautam --- include/uapi/linux/virtio_iommu.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/include/uapi/linux/virtio_iommu.h b/include/uapi/linux/virtio_iommu.h index c12d9b6a7243..1b174b98663a 100644 --- a/include/uapi/linux/virtio_iommu.h +++ b/include/uapi/linux/virtio_iommu.h @@ -48,6 +48,7 @@ struct virtio_iommu_config { #define VIRTIO_IOMMU_T_PROBE 0x05 #define VIRTIO_IOMMU_T_ATTACH_TABLE 0x06 #define VIRTIO_IOMMU_T_INVALIDATE 0x07 +#define VIRTIO_IOMMU_T_PAGE_RESP 0x08 /* Status types */ #define VIRTIO_IOMMU_S_OK 0x00 @@ -70,6 +71,23 @@ struct virtio_iommu_req_tail { __u8 reserved[3]; }; +struct virtio_iommu_req_page_resp { + struct virtio_iommu_req_head head; + __le32 domain; + __le32 endpoint; +#define VIRTIO_IOMMU_PAGE_RESP_PASID_VALID (1 << 0) + __le32 flags; + __le32 pasid; + __le32 grpid; +#define VIRTIO_IOMMU_PAGE_RESP_SUCCESS (0x0) +#define VIRTIO_IOMMU_PAGE_RESP_INVALID (0x1) +#define VIRTIO_IOMMU_PAGE_RESP_FAILURE (0x2) + __le16 resp_code; + __u8 pasid_valid; + __u8 reserved[9]; + struct virtio_iommu_req_tail tail; +}; + struct virtio_iommu_req_attach { struct virtio_iommu_req_head head; __le32 domain; -- 2.17.1