From c4fa3864281c7d88b7262cbc6cbd5c90bb59860e Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Wed, 26 Nov 2008 15:51:19 +0100 Subject: 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 --- virt/kvm/iommu.c | 217 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ virt/kvm/vtd.c | 217 ------------------------------------------------------- 2 files changed, 217 insertions(+), 217 deletions(-) create mode 100644 virt/kvm/iommu.c delete mode 100644 virt/kvm/vtd.c (limited to 'virt') diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c new file mode 100644 index 000000000000..d46de9af838b --- /dev/null +++ b/virt/kvm/iommu.c @@ -0,0 +1,217 @@ +/* + * 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 + * Author: Weidong Han + * Author: Ben-Ami Yassour + */ + +#include +#include +#include +#include +#include + +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; +} diff --git a/virt/kvm/vtd.c b/virt/kvm/vtd.c deleted file mode 100644 index d46de9af838b..000000000000 --- 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 - * Author: Weidong Han - * Author: Ben-Ami Yassour - */ - -#include -#include -#include -#include -#include - -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; -} -- cgit v1.2.3