From patchwork Fri Apr 23 09:51:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Kumar Gautam X-Patchwork-Id: 12220035 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,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 69973C433ED for ; Fri, 23 Apr 2021 09:56:21 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 0CC18613CB for ; Fri, 23 Apr 2021 09:56:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0CC18613CB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:MIME-Version:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:References:In-Reply-To:Message-Id:Date:Subject:Cc:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=i6m102Y4MJmaFM90rsuETkxyXAF48d2my63fvBqPtKw=; b=kUpaM+Wzl/UbefB8QAS4xCJaAt zsZCNB/rWlRlF6clhOfWmwR/tJpN1HFLVj9/Kdn1RKC8Gi/gm9APOpaCxv5lkCPo0y6O8cMq6A9p/ ilOmqumomARQT0bO81bCSsEYydHp0+zSmYfCIA54vYg+lWDDAXfzxZhTsRQtPn7KN/YXy+AYXde/i jMwIPn8QGXmTI2WMLoLO0Wm505yUCIRXSOVjGCwG7Tp6NUgUnGBeYO78e9YMhLpVA0pqVoexUhAxC oT9H6vgAqvoXhFQG5S4BLXZrJ3Fw6lEd5jWmnKAOadxgf0y9rtZ1cnZpfX/jgy11KTbHh2PEhETqv zV3h/NAA==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lZsW6-001Dvu-2x; Fri, 23 Apr 2021 09:54:30 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lZsUT-001DIt-F6 for linux-arm-kernel@desiato.infradead.org; Fri, 23 Apr 2021 09:52:49 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description; bh=2jgUlMmfnhhasq23zj775agutNaGnLGTsKaQxNPAN9o=; b=LL1YUUJv8yUTthaA1KhrI9lFy0 JRaTBmqxWzTQMy8mn5pbIwSothjt1TuBoy84Rv9e5Y+q++gkh5exxRJgBlTzdnG/SD3B0u1Iu2f1H ooc9SeOs6wPbEHq2Rm81qACFLkizhdKF5XIiYxVDSxfGmqQa0hCPJuqWjnuqlLuEfRHvJXhLztEb8 3q8A3M+hqkw/ehDVxCszeS1AMKZ3Vh/e68mC4AxunCdT4Da/lDDU4Dt5nJwp13VJqVi/NQf+CoXiQ t6h22Aw8LhlyMgefgsZyyMRYCSlKntRiC1P1mT5+yfKgoxnAly2YpQcIeM2oHYkXRp2T0PVAs1gI1 P1CkhBWw==; Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lZsUP-00EIkc-UY for linux-arm-kernel@lists.infradead.org; Fri, 23 Apr 2021 09:52:48 +0000 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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210423_025246_049460_EBC416EC X-CRM114-Status: UNSURE ( 9.15 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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;