diff options
Diffstat (limited to 'arch/x86/kvm/vtd.c')
| -rw-r--r-- | arch/x86/kvm/vtd.c | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/arch/x86/kvm/vtd.c b/arch/x86/kvm/vtd.c deleted file mode 100644 index a770874..0000000 --- a/arch/x86/kvm/vtd.c +++ /dev/null @@ -1,191 +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 */ - pfn = (pfn_t)intel_iommu_iova_to_pfn(domain, - gfn_to_gpa(gfn)); - if (pfn) - continue; - - pfn = gfn_to_pfn(kvm, gfn); - r = intel_iommu_page_mapping(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_pages:" - "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_iommu_map_guest(struct kvm *kvm, - struct kvm_assigned_dev_kernel *assigned_dev) -{ - struct pci_dev *pdev = NULL; - int r; - - if (!intel_iommu_found()) { - printk(KERN_ERR "%s: intel iommu not found\n", __func__); - return -ENODEV; - } - - printk(KERN_DEBUG "VT-d direct map: host bdf = %x:%x:%x\n", - assigned_dev->host_busnr, - PCI_SLOT(assigned_dev->host_devfn), - PCI_FUNC(assigned_dev->host_devfn)); - - pdev = assigned_dev->dev; - - if (pdev == NULL) { - if (kvm->arch.intel_iommu_domain) { - intel_iommu_domain_exit(kvm->arch.intel_iommu_domain); - kvm->arch.intel_iommu_domain = NULL; - } - return -ENODEV; - } - - kvm->arch.intel_iommu_domain = intel_iommu_domain_alloc(pdev); - if (!kvm->arch.intel_iommu_domain) - return -ENODEV; - - r = kvm_iommu_map_memslots(kvm); - if (r) - goto out_unmap; - - intel_iommu_detach_dev(kvm->arch.intel_iommu_domain, - pdev->bus->number, pdev->devfn); - - r = intel_iommu_context_mapping(kvm->arch.intel_iommu_domain, - pdev); - if (r) { - printk(KERN_ERR "Domain context map for %s failed", - pci_name(pdev)); - 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; - int i; - - for (i = 0; i < npages; i++) { - pfn = (pfn_t)intel_iommu_iova_to_pfn(domain, - gfn_to_gpa(gfn)); - kvm_release_pfn_clean(pfn); - gfn++; - } -} - -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 kvm_assigned_dev_kernel *entry; - struct dmar_domain *domain = kvm->arch.intel_iommu_domain; - - /* check if iommu exists and in use */ - if (!domain) - return 0; - - list_for_each_entry(entry, &kvm->arch.assigned_dev_head, list) { - printk(KERN_DEBUG "VT-d unmap: host bdf = %x:%x:%x\n", - entry->host_busnr, - PCI_SLOT(entry->host_devfn), - PCI_FUNC(entry->host_devfn)); - - /* detach kvm dmar domain */ - intel_iommu_detach_dev(domain, entry->host_busnr, - entry->host_devfn); - } - kvm_iommu_unmap_memslots(kvm); - intel_iommu_domain_exit(domain); - return 0; -} |
