From patchwork Wed Apr 26 10:06:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Liu, Yi L" X-Patchwork-Id: 9700967 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9838A603F4 for ; Wed, 26 Apr 2017 10:24:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7526C285EF for ; Wed, 26 Apr 2017 10:24:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6A099285F3; Wed, 26 Apr 2017 10:24:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B9715285EF for ; Wed, 26 Apr 2017 10:24:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2998069AbdDZKYB (ORCPT ); Wed, 26 Apr 2017 06:24:01 -0400 Received: from mga04.intel.com ([192.55.52.120]:26758 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2998068AbdDZKX7 (ORCPT ); Wed, 26 Apr 2017 06:23:59 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Apr 2017 03:23:48 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,254,1488873600"; d="scan'208";a="79066337" Received: from sky-dev.bj.intel.com ([10.238.145.47]) by orsmga002.jf.intel.com with ESMTP; 26 Apr 2017 03:23:45 -0700 From: "Liu, Yi L" To: qemu-devel@nongnu.org, alex.williamson@redhat.com, peterx@redhat.com Cc: kvm@vger.kernel.org, jasowang@redhat.com, iommu@lists.linux-foundation.org, kevin.tian@intel.com, ashok.raj@intel.com, jacob.jun.pan@intel.com, tianyu.lan@intel.com, yi.l.liu@intel.com, jean-philippe.brucker@arm.com, "Liu, Yi L" Subject: [RFC PATCH 05/20] VFIO: add new IOCTL for svm bind tasks Date: Wed, 26 Apr 2017 18:06:35 +0800 Message-Id: <1493201210-14357-6-git-send-email-yi.l.liu@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1493201210-14357-1-git-send-email-yi.l.liu@linux.intel.com> References: <1493201210-14357-1-git-send-email-yi.l.liu@linux.intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a new IOCTL cmd VFIO_IOMMU_SVM_BIND_TASK attached on container->fd. On VT-d, this IOCTL cmd would be used to link the guest PASID page table to host. While for other vendors, it may also be used to support other kind of SVM bind request. Previously, there is a discussion on it with ARM engineer. It can be found by the link below. This IOCTL cmd may support SVM PASID bind request from userspace driver, or page table(cr3) bind request from guest. These SVM bind requests would be supported by adding different flags. e.g. VFIO_SVM_BIND_PASID is added to support PASID bind from userspace driver, VFIO_SVM_BIND_PGTABLE is added to support page table bind from guest. https://patchwork.kernel.org/patch/9594231/ Signed-off-by: Liu, Yi L --- linux-headers/linux/vfio.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/linux-headers/linux/vfio.h b/linux-headers/linux/vfio.h index 759b850..9848d63 100644 --- a/linux-headers/linux/vfio.h +++ b/linux-headers/linux/vfio.h @@ -537,6 +537,24 @@ struct vfio_iommu_type1_dma_unmap { #define VFIO_IOMMU_ENABLE _IO(VFIO_TYPE, VFIO_BASE + 15) #define VFIO_IOMMU_DISABLE _IO(VFIO_TYPE, VFIO_BASE + 16) +/* IOCTL for Shared Virtual Memory Bind */ +struct vfio_device_svm { + __u32 argsz; +#define VFIO_SVM_BIND_PASIDTBL (1 << 0) /* Bind PASID Table */ +#define VFIO_SVM_BIND_PASID (1 << 1) /* Bind PASID from userspace driver */ +#define VFIO_SVM_BIND_PGTABLE (1 << 2) /* Bind guest mmu page table */ + __u32 flags; + __u32 length; + __u8 data[]; +}; + +#define VFIO_SVM_TYPE_MASK (VFIO_SVM_BIND_PASIDTBL | \ + VFIO_SVM_BIND_PASID | \ + VFIO_SVM_BIND_PGTABLE ) + +#define VFIO_IOMMU_SVM_BIND_TASK _IO(VFIO_TYPE, VFIO_BASE + 22) + + /* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */ /*