From mboxrd@z Thu Jan 1 00:00:00 1970 From: "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> References: <1493201525-14418-1-git-send-email-yi.l.liu@intel.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" To: kvm@vger.kernel.org, iommu@lists.linux-foundation.org, alex.williamson@redhat.com, peterx@redhat.com Return-path: 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 In-Reply-To: <1493201525-14418-1-git-send-email-yi.l.liu@intel.com> Sender: kvm-owner@vger.kernel.org List-ID: 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; -- 1.9.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52202) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3KBq-0007KR-Ko for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:28:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3KBo-0004YD-LA for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:28:54 -0400 Received: from mga03.intel.com ([134.134.136.65]:33549) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3KBo-0004JF-9h for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:28:52 -0400 From: "Liu, Yi L" Date: Wed, 26 Apr 2017 18:12:05 +0800 Message-Id: <1493201525-14418-9-git-send-email-yi.l.liu@intel.com> 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> Subject: [Qemu-devel] [RFC PATCH 8/8] VFIO: do IOMMU TLB invalidation from guest List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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" 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; -- 1.9.1