From patchwork Wed Apr 26 10:12:05 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 9701027 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 33BF6603F6 for ; Wed, 26 Apr 2017 10:29:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0AFA128450 for ; Wed, 26 Apr 2017 10:29:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F3ED9285EF; Wed, 26 Apr 2017 10:29:11 +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 8292728450 for ; Wed, 26 Apr 2017 10:29:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2998254AbdDZK3J (ORCPT ); Wed, 26 Apr 2017 06:29:09 -0400 Received: from mga09.intel.com ([134.134.136.24]:48963 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2998236AbdDZK3A (ORCPT ); Wed, 26 Apr 2017 06:29:00 -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 03:28:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,254,1488873600"; d="scan'208";a="80992061" Received: from sky-dev.bj.intel.com ([10.238.145.47]) by orsmga004.jf.intel.com with ESMTP; 26 Apr 2017 03:28:49 -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 8/8] VFIO: do IOMMU TLB invalidation from guest Date: Wed, 26 Apr 2017 18:12:05 +0800 Message-Id: <1493201525-14418-9-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 support for VFIO_IOMMU_TLB_INVALIDATE cmd in vfio_iommu_type1. For SVM virtualization on VT-d, for VFIO_IOMMU_TLB_INVALIDATE, it calls iommu_ops->do_invalidate() to submit the guest iommu cache invalidation to pIOMMU. Signed-off-by: Liu, Yi L --- drivers/vfio/vfio_iommu_type1.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 30b6d48..6cebdfd 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -1528,6 +1528,17 @@ static int bind_pasid_tbl_fn(struct device *dev, void *data) return ret; } +static int do_tlb_inv_fn(struct device *dev, void *data) +{ + int ret = 0; + struct vfio_svm_task *task = data; + struct tlb_invalidate_info *inv_info; + + inv_info = task->payload; + ret = iommu_do_invalidate(task->domain, dev, inv_info); + return ret; +} + static int vfio_do_svm_task(struct vfio_iommu *iommu, void *data, int (*fn)(struct device *, void *)) { @@ -1654,6 +1665,21 @@ static long vfio_iommu_type1_ioctl(void *iommu_data, } kfree(data); return ret; + } else if (cmd == VFIO_IOMMU_TLB_INVALIDATE) { + struct vfio_iommu_tlb_invalidate hdr; + u8 *data = NULL; + int ret = 0; + + minsz = offsetofend(struct vfio_iommu_tlb_invalidate, length); + if (copy_from_user(&hdr, (void __user *)arg, minsz)) + return -EFAULT; + if (hdr.length == 0) + return -EINVAL; + data = memdup_user((void __user *)(arg + minsz), + hdr.length); + ret = vfio_do_svm_task(iommu, data, do_tlb_inv_fn); + kfree(data); + return ret; } return -ENOTTY;