From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52117) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3KBh-0007CW-Ha for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:28:46 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3KBg-0004TO-K6 for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:28:45 -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 1d3KBg-0004JF-Ap for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:28:44 -0400 From: "Liu, Yi L" Date: Wed, 26 Apr 2017 18:12:03 +0800 Message-Id: <1493201525-14418-7-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 6/8] VFIO: do pasid table binding 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 IOCTL processing in vfio_iommu_type1 for VFIO_IOMMU_SVM_BIND_TASK. Binds the PASID table bind by calling iommu_ops->bind_pasid_table to link the whole PASID table to pIOMMU. For VT-d, it is linking the guest PASID table to host pIOMMU. This is key point to support SVM virtualization on VT-d. Signed-off-by: Liu, Yi L --- drivers/vfio/vfio_iommu_type1.c | 72 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index b3cc33f..30b6d48 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -1512,6 +1512,50 @@ static int vfio_domains_have_iommu_cache(struct vfio_iommu *iommu) return ret; } +struct vfio_svm_task { + struct iommu_domain *domain; + void *payload; +}; + +static int bind_pasid_tbl_fn(struct device *dev, void *data) +{ + int ret = 0; + struct vfio_svm_task *task = data; + struct pasid_table_info *pasidt_binfo; + + pasidt_binfo = task->payload; + ret = iommu_bind_pasid_table(task->domain, dev, pasidt_binfo); + return ret; +} + +static int vfio_do_svm_task(struct vfio_iommu *iommu, void *data, + int (*fn)(struct device *, void *)) +{ + int ret = 0; + struct vfio_domain *d; + struct vfio_group *g; + struct vfio_svm_task task; + + task.payload = data; + + mutex_lock(&iommu->lock); + + list_for_each_entry(d, &iommu->domain_list, next) { + list_for_each_entry(g, &d->group_list, next) { + if (g->iommu_group != NULL) { + task.domain = d->domain; + ret = iommu_group_for_each_dev( + g->iommu_group, &task, fn); + if (ret != 0) + break; + } + } + } + + mutex_unlock(&iommu->lock); + return ret; +} + static long vfio_iommu_type1_ioctl(void *iommu_data, unsigned int cmd, unsigned long arg) { @@ -1582,6 +1626,34 @@ static long vfio_iommu_type1_ioctl(void *iommu_data, return copy_to_user((void __user *)arg, &unmap, minsz) ? -EFAULT : 0; + } else if (cmd == VFIO_IOMMU_SVM_BIND_TASK) { + struct vfio_device_svm hdr; + u8 *data = NULL; + int ret = 0; + + minsz = offsetofend(struct vfio_device_svm, 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); + if (IS_ERR(data)) + return PTR_ERR(data); + + switch (hdr.flags & VFIO_SVM_TYPE_MASK) { + case VFIO_SVM_BIND_PASIDTBL: + ret = vfio_do_svm_task(iommu, data, + bind_pasid_tbl_fn); + break; + default: + ret = -EINVAL; + break; + } + kfree(data); + return ret; } return -ENOTTY; -- 1.9.1