From patchwork Wed Apr 26 10:12:04 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 9701023 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 85851603F7 for ; Wed, 26 Apr 2017 10:29:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5D36928450 for ; Wed, 26 Apr 2017 10:29:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5209A285EF; Wed, 26 Apr 2017 10:29:07 +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 064EC28450 for ; Wed, 26 Apr 2017 10:29:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2998250AbdDZK3F (ORCPT ); Wed, 26 Apr 2017 06:29:05 -0400 Received: from mga09.intel.com ([134.134.136.24]:54697 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2998221AbdDZK27 (ORCPT ); Wed, 26 Apr 2017 06:28:59 -0400 Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Apr 2017 03:28:48 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,254,1488873600"; d="scan'208";a="80992050" Received: from sky-dev.bj.intel.com ([10.238.145.47]) by orsmga004.jf.intel.com with ESMTP; 26 Apr 2017 03:28:45 -0700 From: "Liu, Yi L" To: kvm@vger.kernel.org, iommu@lists.linux-foundation.org, alex.williamson@redhat.com, peterx@redhat.com Cc: jasowang@redhat.com, qemu-devel@nongnu.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 7/8] VFIO: Add new IOCTL for IOMMU TLB invalidate propagation Date: Wed, 26 Apr 2017 18:12:04 +0800 Message-Id: <1493201525-14418-8-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1493201525-14418-1-git-send-email-yi.l.liu@intel.com> References: <1493201525-14418-1-git-send-email-yi.l.liu@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 From: "Liu, Yi L" This patch adds VFIO_IOMMU_TLB_INVALIDATE to propagate IOMMU TLB invalidate request from guest to host. In the case of SVM virtualization on VT-d, host IOMMU driver has no knowledge of caching structure updates unless the guest invalidation activities are passed down to the host. So a new IOCTL is needed to propagate the guest cache invalidation through VFIO. Signed-off-by: Liu, Yi L --- include/uapi/linux/vfio.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 6b97987..50c51f8 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -564,6 +564,15 @@ struct vfio_device_svm { #define VFIO_IOMMU_SVM_BIND_TASK _IO(VFIO_TYPE, VFIO_BASE + 22) +/* For IOMMU TLB Invalidation Propagation */ +struct vfio_iommu_tlb_invalidate { + __u32 argsz; + __u32 length; + __u8 data[]; +}; + +#define VFIO_IOMMU_TLB_INVALIDATE _IO(VFIO_TYPE, VFIO_BASE + 23) + /* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */ /*