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authorJoerg Roedel <joerg.roedel@amd.com>2008-11-26 15:51:19 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2009-01-03 14:10:09 +0100
commitc4fa3864281c7d88b7262cbc6cbd5c90bb59860e (patch)
tree21209dceb4d978e24a009b848115d0d8bea0cbcc /virt/kvm/vtd.c
parentb653574a7d14b663cc812cb20be6a114939ba186 (diff)
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KVM: rename vtd.c to iommu.c
Impact: file renamed The code in the vtd.c file can be reused for other IOMMUs as well. So rename it to make it clear that it handle more than VT-d. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'virt/kvm/vtd.c')
-rw-r--r--virt/kvm/vtd.c217
1 files changed, 0 insertions, 217 deletions
diff --git a/virt/kvm/vtd.c b/virt/kvm/vtd.c
deleted file mode 100644
index d46de9af838..00000000000
--- a/virt/kvm/vtd.c
+++ /dev/null
@@ -1,217 +0,0 @@
-/*
- * Copyright (c) 2006, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Copyright (C) 2006-2008 Intel Corporation
- * Copyright IBM Corporation, 2008
- * Author: Allen M. Kay <allen.m.kay@intel.com>
- * Author: Weidong Han <weidong.han@intel.com>
- * Author: Ben-Ami Yassour <benami@il.ibm.com>
- */
-
-#include <linux/list.h>
-#include <linux/kvm_host.h>
-#include <linux/pci.h>
-#include <linux/dmar.h>
-#include <linux/intel-iommu.h>
-
-static int kvm_iommu_unmap_memslots(struct kvm *kvm);
-static void kvm_iommu_put_pages(struct kvm *kvm,
- gfn_t base_gfn, unsigned long npages);
-
-int kvm_iommu_map_pages(struct kvm *kvm,
- gfn_t base_gfn, unsigned long npages)
-{
- gfn_t gfn = base_gfn;
- pfn_t pfn;
- int i, r = 0;
- struct dmar_domain *domain = kvm->arch.intel_iommu_domain;
-
- /* check if iommu exists and in use */
- if (!domain)
- return 0;
-
- for (i = 0; i < npages; i++) {
- /* check if already mapped */
- if (intel_iommu_iova_to_phys(domain,
- gfn_to_gpa(gfn)))
- continue;
-
- pfn = gfn_to_pfn(kvm, gfn);
- r = intel_iommu_map_address(domain,
- gfn_to_gpa(gfn),
- pfn_to_hpa(pfn),
- PAGE_SIZE,
- DMA_PTE_READ | DMA_PTE_WRITE);
- if (r) {
- printk(KERN_ERR "kvm_iommu_map_address:"
- "iommu failed to map pfn=%lx\n", pfn);
- goto unmap_pages;
- }
- gfn++;
- }
- return 0;
-
-unmap_pages:
- kvm_iommu_put_pages(kvm, base_gfn, i);
- return r;
-}
-
-static int kvm_iommu_map_memslots(struct kvm *kvm)
-{
- int i, r;
-
- down_read(&kvm->slots_lock);
- for (i = 0; i < kvm->nmemslots; i++) {
- r = kvm_iommu_map_pages(kvm, kvm->memslots[i].base_gfn,
- kvm->memslots[i].npages);
- if (r)
- break;
- }
- up_read(&kvm->slots_lock);
- return r;
-}
-
-int kvm_assign_device(struct kvm *kvm,
- struct kvm_assigned_dev_kernel *assigned_dev)
-{
- struct pci_dev *pdev = NULL;
- struct dmar_domain *domain = kvm->arch.intel_iommu_domain;
- int r;
-
- /* check if iommu exists and in use */
- if (!domain)
- return 0;
-
- pdev = assigned_dev->dev;
- if (pdev == NULL)
- return -ENODEV;
-
- r = intel_iommu_attach_device(domain, pdev);
- if (r) {
- printk(KERN_ERR "assign device %x:%x.%x failed",
- pdev->bus->number,
- PCI_SLOT(pdev->devfn),
- PCI_FUNC(pdev->devfn));
- return r;
- }
-
- printk(KERN_DEBUG "assign device: host bdf = %x:%x:%x\n",
- assigned_dev->host_busnr,
- PCI_SLOT(assigned_dev->host_devfn),
- PCI_FUNC(assigned_dev->host_devfn));
-
- return 0;
-}
-
-int kvm_deassign_device(struct kvm *kvm,
- struct kvm_assigned_dev_kernel *assigned_dev)
-{
- struct dmar_domain *domain = kvm->arch.intel_iommu_domain;
- struct pci_dev *pdev = NULL;
-
- /* check if iommu exists and in use */
- if (!domain)
- return 0;
-
- pdev = assigned_dev->dev;
- if (pdev == NULL)
- return -ENODEV;
-
- intel_iommu_detach_device(domain, pdev);
-
- printk(KERN_DEBUG "deassign device: host bdf = %x:%x:%x\n",
- assigned_dev->host_busnr,
- PCI_SLOT(assigned_dev->host_devfn),
- PCI_FUNC(assigned_dev->host_devfn));
-
- return 0;
-}
-
-int kvm_iommu_map_guest(struct kvm *kvm)
-{
- int r;
-
- if (!intel_iommu_found()) {
- printk(KERN_ERR "%s: intel iommu not found\n", __func__);
- return -ENODEV;
- }
-
- kvm->arch.intel_iommu_domain = intel_iommu_alloc_domain();
- if (!kvm->arch.intel_iommu_domain)
- return -ENOMEM;
-
- r = kvm_iommu_map_memslots(kvm);
- if (r)
- goto out_unmap;
-
- return 0;
-
-out_unmap:
- kvm_iommu_unmap_memslots(kvm);
- return r;
-}
-
-static void kvm_iommu_put_pages(struct kvm *kvm,
- gfn_t base_gfn, unsigned long npages)
-{
- gfn_t gfn = base_gfn;
- pfn_t pfn;
- struct dmar_domain *domain = kvm->arch.intel_iommu_domain;
- unsigned long i;
- u64 phys;
-
- /* check if iommu exists and in use */
- if (!domain)
- return;
-
- for (i = 0; i < npages; i++) {
- phys = intel_iommu_iova_to_phys(domain,
- gfn_to_gpa(gfn));
- pfn = phys >> PAGE_SHIFT;
- kvm_release_pfn_clean(pfn);
- gfn++;
- }
-
- intel_iommu_unmap_address(domain,
- gfn_to_gpa(base_gfn),
- PAGE_SIZE * npages);
-}
-
-static int kvm_iommu_unmap_memslots(struct kvm *kvm)
-{
- int i;
- down_read(&kvm->slots_lock);
- for (i = 0; i < kvm->nmemslots; i++) {
- kvm_iommu_put_pages(kvm, kvm->memslots[i].base_gfn,
- kvm->memslots[i].npages);
- }
- up_read(&kvm->slots_lock);
-
- return 0;
-}
-
-int kvm_iommu_unmap_guest(struct kvm *kvm)
-{
- struct dmar_domain *domain = kvm->arch.intel_iommu_domain;
-
- /* check if iommu exists and in use */
- if (!domain)
- return 0;
-
- kvm_iommu_unmap_memslots(kvm);
- intel_iommu_free_domain(domain);
- return 0;
-}