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 */
47 for (i
= 0; i
< npages
; i
++) {
48 /* check if already mapped */
49 pfn
= (pfn_t
)intel_iommu_iova_to_pfn(domain
,
51 if (pfn
&& !is_mmio_pfn(pfn
))
54 pfn
= gfn_to_pfn(kvm
, gfn
);
55 if (!is_mmio_pfn(pfn
)) {
56 r
= intel_iommu_page_mapping(domain
,
63 printk(KERN_DEBUG
"kvm_iommu_map_pages:"
64 "iommu failed to map pfn=%lx\n", pfn
);
68 printk(KERN_DEBUG
"kvm_iommu_map_page:"
69 "invalid pfn=%lx\n", pfn
);
77 kvm_iommu_put_pages(kvm
, base_gfn
, i
);
81 static int kvm_iommu_map_memslots(struct kvm
*kvm
)
85 down_read(&kvm
->slots_lock
);
86 for (i
= 0; i
< kvm
->nmemslots
; i
++) {
87 r
= kvm_iommu_map_pages(kvm
, kvm
->memslots
[i
].base_gfn
,
88 kvm
->memslots
[i
].npages
);
92 up_read(&kvm
->slots_lock
);
96 int kvm_iommu_map_guest(struct kvm
*kvm
,
97 struct kvm_assigned_dev_kernel
*assigned_dev
)
99 struct pci_dev
*pdev
= NULL
;
102 if (!intel_iommu_found()) {
103 printk(KERN_ERR
"%s: intel iommu not found\n", __func__
);
107 printk(KERN_DEBUG
"VT-d direct map: host bdf = %x:%x:%x\n",
108 assigned_dev
->host_busnr
,
109 PCI_SLOT(assigned_dev
->host_devfn
),
110 PCI_FUNC(assigned_dev
->host_devfn
));
112 pdev
= assigned_dev
->dev
;
115 if (kvm
->arch
.intel_iommu_domain
) {
116 intel_iommu_domain_exit(kvm
->arch
.intel_iommu_domain
);
117 kvm
->arch
.intel_iommu_domain
= NULL
;
122 kvm
->arch
.intel_iommu_domain
= intel_iommu_domain_alloc(pdev
);
123 if (!kvm
->arch
.intel_iommu_domain
)
126 r
= kvm_iommu_map_memslots(kvm
);
130 intel_iommu_detach_dev(kvm
->arch
.intel_iommu_domain
,
131 pdev
->bus
->number
, pdev
->devfn
);
133 r
= intel_iommu_context_mapping(kvm
->arch
.intel_iommu_domain
,
136 printk(KERN_ERR
"Domain context map for %s failed",
143 kvm_iommu_unmap_memslots(kvm
);
147 static void kvm_iommu_put_pages(struct kvm
*kvm
,
148 gfn_t base_gfn
, unsigned long npages
)
150 gfn_t gfn
= base_gfn
;
152 struct dmar_domain
*domain
= kvm
->arch
.intel_iommu_domain
;
155 for (i
= 0; i
< npages
; i
++) {
156 pfn
= (pfn_t
)intel_iommu_iova_to_pfn(domain
,
158 kvm_release_pfn_clean(pfn
);
163 static int kvm_iommu_unmap_memslots(struct kvm
*kvm
)
166 down_read(&kvm
->slots_lock
);
167 for (i
= 0; i
< kvm
->nmemslots
; i
++) {
168 kvm_iommu_put_pages(kvm
, kvm
->memslots
[i
].base_gfn
,
169 kvm
->memslots
[i
].npages
);
171 up_read(&kvm
->slots_lock
);
176 int kvm_iommu_unmap_guest(struct kvm
*kvm
)
178 struct kvm_assigned_dev_kernel
*entry
;
179 struct dmar_domain
*domain
= kvm
->arch
.intel_iommu_domain
;
181 /* check if iommu exists and in use */
185 list_for_each_entry(entry
, &kvm
->arch
.assigned_dev_head
, list
) {
186 printk(KERN_DEBUG
"VT-d unmap: host bdf = %x:%x:%x\n",
188 PCI_SLOT(entry
->host_devfn
),
189 PCI_FUNC(entry
->host_devfn
));
191 /* detach kvm dmar domain */
192 intel_iommu_detach_dev(domain
, entry
->host_busnr
,
195 kvm_iommu_unmap_memslots(kvm
);
196 intel_iommu_domain_exit(domain
);
This page took 0.0345 seconds and 5 git commands to generate.