d46de9af838bee778c4bdf060872dcf37dabe2db
2 * Copyright (c) 2006, Intel Corporation.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307 USA.
17 * Copyright (C) 2006-2008 Intel Corporation
18 * Copyright IBM Corporation, 2008
19 * Author: Allen M. Kay <allen.m.kay@intel.com>
20 * Author: Weidong Han <weidong.han@intel.com>
21 * Author: Ben-Ami Yassour <benami@il.ibm.com>
24 #include <linux/list.h>
25 #include <linux/kvm_host.h>
26 #include <linux/pci.h>
27 #include <linux/dmar.h>
28 #include <linux/intel-iommu.h>
30 static int kvm_iommu_unmap_memslots(struct kvm
*kvm
);
31 static void kvm_iommu_put_pages(struct kvm
*kvm
,
32 gfn_t base_gfn
, unsigned long npages
);
34 int kvm_iommu_map_pages(struct kvm
*kvm
,
35 gfn_t base_gfn
, unsigned long npages
)
40 struct dmar_domain
*domain
= kvm
->arch
.intel_iommu_domain
;
42 /* check if iommu exists and in use */
46 for (i
= 0; i
< npages
; i
++) {
47 /* check if already mapped */
48 if (intel_iommu_iova_to_phys(domain
,
52 pfn
= gfn_to_pfn(kvm
, gfn
);
53 r
= intel_iommu_map_address(domain
,
57 DMA_PTE_READ
| DMA_PTE_WRITE
);
59 printk(KERN_ERR
"kvm_iommu_map_address:"
60 "iommu failed to map pfn=%lx\n", pfn
);
68 kvm_iommu_put_pages(kvm
, base_gfn
, i
);
72 static int kvm_iommu_map_memslots(struct kvm
*kvm
)
76 down_read(&kvm
->slots_lock
);
77 for (i
= 0; i
< kvm
->nmemslots
; i
++) {
78 r
= kvm_iommu_map_pages(kvm
, kvm
->memslots
[i
].base_gfn
,
79 kvm
->memslots
[i
].npages
);
83 up_read(&kvm
->slots_lock
);
87 int kvm_assign_device(struct kvm
*kvm
,
88 struct kvm_assigned_dev_kernel
*assigned_dev
)
90 struct pci_dev
*pdev
= NULL
;
91 struct dmar_domain
*domain
= kvm
->arch
.intel_iommu_domain
;
94 /* check if iommu exists and in use */
98 pdev
= assigned_dev
->dev
;
102 r
= intel_iommu_attach_device(domain
, pdev
);
104 printk(KERN_ERR
"assign device %x:%x.%x failed",
106 PCI_SLOT(pdev
->devfn
),
107 PCI_FUNC(pdev
->devfn
));
111 printk(KERN_DEBUG
"assign device: host bdf = %x:%x:%x\n",
112 assigned_dev
->host_busnr
,
113 PCI_SLOT(assigned_dev
->host_devfn
),
114 PCI_FUNC(assigned_dev
->host_devfn
));
119 int kvm_deassign_device(struct kvm
*kvm
,
120 struct kvm_assigned_dev_kernel
*assigned_dev
)
122 struct dmar_domain
*domain
= kvm
->arch
.intel_iommu_domain
;
123 struct pci_dev
*pdev
= NULL
;
125 /* check if iommu exists and in use */
129 pdev
= assigned_dev
->dev
;
133 intel_iommu_detach_device(domain
, pdev
);
135 printk(KERN_DEBUG
"deassign device: host bdf = %x:%x:%x\n",
136 assigned_dev
->host_busnr
,
137 PCI_SLOT(assigned_dev
->host_devfn
),
138 PCI_FUNC(assigned_dev
->host_devfn
));
143 int kvm_iommu_map_guest(struct kvm
*kvm
)
147 if (!intel_iommu_found()) {
148 printk(KERN_ERR
"%s: intel iommu not found\n", __func__
);
152 kvm
->arch
.intel_iommu_domain
= intel_iommu_alloc_domain();
153 if (!kvm
->arch
.intel_iommu_domain
)
156 r
= kvm_iommu_map_memslots(kvm
);
163 kvm_iommu_unmap_memslots(kvm
);
167 static void kvm_iommu_put_pages(struct kvm
*kvm
,
168 gfn_t base_gfn
, unsigned long npages
)
170 gfn_t gfn
= base_gfn
;
172 struct dmar_domain
*domain
= kvm
->arch
.intel_iommu_domain
;
176 /* check if iommu exists and in use */
180 for (i
= 0; i
< npages
; i
++) {
181 phys
= intel_iommu_iova_to_phys(domain
,
183 pfn
= phys
>> PAGE_SHIFT
;
184 kvm_release_pfn_clean(pfn
);
188 intel_iommu_unmap_address(domain
,
189 gfn_to_gpa(base_gfn
),
193 static int kvm_iommu_unmap_memslots(struct kvm
*kvm
)
196 down_read(&kvm
->slots_lock
);
197 for (i
= 0; i
< kvm
->nmemslots
; i
++) {
198 kvm_iommu_put_pages(kvm
, kvm
->memslots
[i
].base_gfn
,
199 kvm
->memslots
[i
].npages
);
201 up_read(&kvm
->slots_lock
);
206 int kvm_iommu_unmap_guest(struct kvm
*kvm
)
208 struct dmar_domain
*domain
= kvm
->arch
.intel_iommu_domain
;
210 /* check if iommu exists and in use */
214 kvm_iommu_unmap_memslots(kvm
);
215 intel_iommu_free_domain(domain
);
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