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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * ACRN: Memory mapping management
4 *
5 * Copyright (C) 2020 Intel Corporation. All rights reserved.
6 *
7 * Authors:
8 * Fei Li <lei1.li@intel.com>
9 * Shuo Liu <shuo.a.liu@intel.com>
10 */
11
12#include <linux/io.h>
13#include <linux/mm.h>
14#include <linux/slab.h>
15#include <linux/vmalloc.h>
16
17#include "acrn_drv.h"
18
19static int modify_region(struct acrn_vm *vm, struct vm_memory_region_op *region)
20{
21 struct vm_memory_region_batch *regions;
22 int ret;
23
24 regions = kzalloc(sizeof(*regions), GFP_KERNEL);
25 if (!regions)
26 return -ENOMEM;
27
28 regions->vmid = vm->vmid;
29 regions->regions_num = 1;
30 regions->regions_gpa = virt_to_phys(region);
31
32 ret = hcall_set_memory_regions(virt_to_phys(regions));
33 if (ret < 0)
34 dev_dbg(acrn_dev.this_device,
35 "Failed to set memory region for VM[%u]!\n", vm->vmid);
36
37 kfree(regions);
38 return ret;
39}
40
41/**
42 * acrn_mm_region_add() - Set up the EPT mapping of a memory region.
43 * @vm: User VM.
44 * @user_gpa: A GPA of User VM.
45 * @service_gpa: A GPA of Service VM.
46 * @size: Size of the region.
47 * @mem_type: Combination of ACRN_MEM_TYPE_*.
48 * @mem_access_right: Combination of ACRN_MEM_ACCESS_*.
49 *
50 * Return: 0 on success, <0 on error.
51 */
52int acrn_mm_region_add(struct acrn_vm *vm, u64 user_gpa, u64 service_gpa,
53 u64 size, u32 mem_type, u32 mem_access_right)
54{
55 struct vm_memory_region_op *region;
56 int ret = 0;
57
58 region = kzalloc(sizeof(*region), GFP_KERNEL);
59 if (!region)
60 return -ENOMEM;
61
62 region->type = ACRN_MEM_REGION_ADD;
63 region->user_vm_pa = user_gpa;
64 region->service_vm_pa = service_gpa;
65 region->size = size;
66 region->attr = ((mem_type & ACRN_MEM_TYPE_MASK) |
67 (mem_access_right & ACRN_MEM_ACCESS_RIGHT_MASK));
68 ret = modify_region(vm, region);
69
70 dev_dbg(acrn_dev.this_device,
71 "%s: user-GPA[%pK] service-GPA[%pK] size[0x%llx].\n",
72 __func__, (void *)user_gpa, (void *)service_gpa, size);
73 kfree(region);
74 return ret;
75}
76
77/**
78 * acrn_mm_region_del() - Del the EPT mapping of a memory region.
79 * @vm: User VM.
80 * @user_gpa: A GPA of the User VM.
81 * @size: Size of the region.
82 *
83 * Return: 0 on success, <0 for error.
84 */
85int acrn_mm_region_del(struct acrn_vm *vm, u64 user_gpa, u64 size)
86{
87 struct vm_memory_region_op *region;
88 int ret = 0;
89
90 region = kzalloc(sizeof(*region), GFP_KERNEL);
91 if (!region)
92 return -ENOMEM;
93
94 region->type = ACRN_MEM_REGION_DEL;
95 region->user_vm_pa = user_gpa;
96 region->service_vm_pa = 0UL;
97 region->size = size;
98 region->attr = 0U;
99
100 ret = modify_region(vm, region);
101
102 dev_dbg(acrn_dev.this_device, "%s: user-GPA[%pK] size[0x%llx].\n",
103 __func__, (void *)user_gpa, size);
104 kfree(region);
105 return ret;
106}
107
108int acrn_vm_memseg_map(struct acrn_vm *vm, struct acrn_vm_memmap *memmap)
109{
110 int ret;
111
112 if (memmap->type == ACRN_MEMMAP_RAM)
113 return acrn_vm_ram_map(vm, memmap);
114
115 if (memmap->type != ACRN_MEMMAP_MMIO) {
116 dev_dbg(acrn_dev.this_device,
117 "Invalid memmap type: %u\n", memmap->type);
118 return -EINVAL;
119 }
120
121 ret = acrn_mm_region_add(vm, memmap->user_vm_pa,
122 memmap->service_vm_pa, memmap->len,
123 ACRN_MEM_TYPE_UC, memmap->attr);
124 if (ret < 0)
125 dev_dbg(acrn_dev.this_device,
126 "Add memory region failed, VM[%u]!\n", vm->vmid);
127
128 return ret;
129}
130
131int acrn_vm_memseg_unmap(struct acrn_vm *vm, struct acrn_vm_memmap *memmap)
132{
133 int ret;
134
135 if (memmap->type != ACRN_MEMMAP_MMIO) {
136 dev_dbg(acrn_dev.this_device,
137 "Invalid memmap type: %u\n", memmap->type);
138 return -EINVAL;
139 }
140
141 ret = acrn_mm_region_del(vm, memmap->user_vm_pa, memmap->len);
142 if (ret < 0)
143 dev_dbg(acrn_dev.this_device,
144 "Del memory region failed, VM[%u]!\n", vm->vmid);
145
146 return ret;
147}
148
149/**
150 * acrn_vm_ram_map() - Create a RAM EPT mapping of User VM.
151 * @vm: The User VM pointer
152 * @memmap: Info of the EPT mapping
153 *
154 * Return: 0 on success, <0 for error.
155 */
156int acrn_vm_ram_map(struct acrn_vm *vm, struct acrn_vm_memmap *memmap)
157{
158 struct vm_memory_region_batch *regions_info;
159 int nr_pages, i, order, nr_regions = 0;
160 struct vm_memory_mapping *region_mapping;
161 struct vm_memory_region_op *vm_region;
162 struct page **pages = NULL, *page;
163 void *remap_vaddr;
164 int ret, pinned;
165 u64 user_vm_pa;
166 struct vm_area_struct *vma;
167
168 if (!vm || !memmap)
169 return -EINVAL;
170
171 /* Get the page number of the map region */
172 nr_pages = memmap->len >> PAGE_SHIFT;
173 if (!nr_pages)
174 return -EINVAL;
175
176 mmap_read_lock(current->mm);
177 vma = vma_lookup(current->mm, memmap->vma_base);
178 if (vma && ((vma->vm_flags & VM_PFNMAP) != 0)) {
179 unsigned long start_pfn, cur_pfn;
180 bool writable;
181
182 if ((memmap->vma_base + memmap->len) > vma->vm_end) {
183 mmap_read_unlock(current->mm);
184 return -EINVAL;
185 }
186
187 for (i = 0; i < nr_pages; i++) {
188 struct follow_pfnmap_args args = {
189 .vma = vma,
190 .address = memmap->vma_base + i * PAGE_SIZE,
191 };
192
193 ret = follow_pfnmap_start(&args);
194 if (ret)
195 break;
196
197 cur_pfn = args.pfn;
198 if (i == 0)
199 start_pfn = cur_pfn;
200 writable = args.writable;
201 follow_pfnmap_end(&args);
202
203 /* Disallow write access if the PTE is not writable. */
204 if (!writable &&
205 (memmap->attr & ACRN_MEM_ACCESS_WRITE)) {
206 ret = -EFAULT;
207 break;
208 }
209
210 /* Disallow refcounted pages. */
211 if (pfn_valid(cur_pfn) &&
212 !PageReserved(pfn_to_page(cur_pfn))) {
213 ret = -EFAULT;
214 break;
215 }
216
217 /* Disallow non-contiguous ranges. */
218 if (cur_pfn != start_pfn + i) {
219 ret = -EINVAL;
220 break;
221 }
222 }
223 mmap_read_unlock(current->mm);
224
225 if (ret) {
226 dev_dbg(acrn_dev.this_device,
227 "Failed to lookup PFN at VMA:%pK.\n", (void *)memmap->vma_base);
228 return ret;
229 }
230
231 return acrn_mm_region_add(vm, memmap->user_vm_pa,
232 PFN_PHYS(start_pfn), memmap->len,
233 ACRN_MEM_TYPE_WB, memmap->attr);
234 }
235 mmap_read_unlock(current->mm);
236
237 pages = vzalloc(array_size(nr_pages, sizeof(*pages)));
238 if (!pages)
239 return -ENOMEM;
240
241 /* Lock the pages of user memory map region */
242 pinned = pin_user_pages_fast(memmap->vma_base,
243 nr_pages, FOLL_WRITE | FOLL_LONGTERM,
244 pages);
245 if (pinned < 0) {
246 ret = pinned;
247 goto free_pages;
248 } else if (pinned != nr_pages) {
249 ret = -EFAULT;
250 goto put_pages;
251 }
252
253 /* Create a kernel map for the map region */
254 remap_vaddr = vmap(pages, nr_pages, VM_MAP, PAGE_KERNEL);
255 if (!remap_vaddr) {
256 ret = -ENOMEM;
257 goto put_pages;
258 }
259
260 /* Record Service VM va <-> User VM pa mapping */
261 mutex_lock(&vm->regions_mapping_lock);
262 region_mapping = &vm->regions_mapping[vm->regions_mapping_count];
263 if (vm->regions_mapping_count < ACRN_MEM_MAPPING_MAX) {
264 region_mapping->pages = pages;
265 region_mapping->npages = nr_pages;
266 region_mapping->size = memmap->len;
267 region_mapping->service_vm_va = remap_vaddr;
268 region_mapping->user_vm_pa = memmap->user_vm_pa;
269 vm->regions_mapping_count++;
270 } else {
271 dev_warn(acrn_dev.this_device,
272 "Run out of memory mapping slots!\n");
273 ret = -ENOMEM;
274 mutex_unlock(&vm->regions_mapping_lock);
275 goto unmap_no_count;
276 }
277 mutex_unlock(&vm->regions_mapping_lock);
278
279 /* Calculate count of vm_memory_region_op */
280 for (i = 0; i < nr_pages; i += 1 << order) {
281 page = pages[i];
282 VM_BUG_ON_PAGE(PageTail(page), page);
283 order = compound_order(page);
284 nr_regions++;
285 }
286
287 /* Prepare the vm_memory_region_batch */
288 regions_info = kzalloc(struct_size(regions_info, regions_op,
289 nr_regions), GFP_KERNEL);
290 if (!regions_info) {
291 ret = -ENOMEM;
292 goto unmap_kernel_map;
293 }
294 regions_info->regions_num = nr_regions;
295
296 /* Fill each vm_memory_region_op */
297 vm_region = regions_info->regions_op;
298 regions_info->vmid = vm->vmid;
299 regions_info->regions_gpa = virt_to_phys(vm_region);
300 user_vm_pa = memmap->user_vm_pa;
301 for (i = 0; i < nr_pages; i += 1 << order) {
302 u32 region_size;
303
304 page = pages[i];
305 VM_BUG_ON_PAGE(PageTail(page), page);
306 order = compound_order(page);
307 region_size = PAGE_SIZE << order;
308 vm_region->type = ACRN_MEM_REGION_ADD;
309 vm_region->user_vm_pa = user_vm_pa;
310 vm_region->service_vm_pa = page_to_phys(page);
311 vm_region->size = region_size;
312 vm_region->attr = (ACRN_MEM_TYPE_WB & ACRN_MEM_TYPE_MASK) |
313 (memmap->attr & ACRN_MEM_ACCESS_RIGHT_MASK);
314
315 vm_region++;
316 user_vm_pa += region_size;
317 }
318
319 /* Inform the ACRN Hypervisor to set up EPT mappings */
320 ret = hcall_set_memory_regions(virt_to_phys(regions_info));
321 if (ret < 0) {
322 dev_dbg(acrn_dev.this_device,
323 "Failed to set regions, VM[%u]!\n", vm->vmid);
324 goto unset_region;
325 }
326 kfree(regions_info);
327
328 dev_dbg(acrn_dev.this_device,
329 "%s: VM[%u] service-GVA[%pK] user-GPA[%pK] size[0x%llx]\n",
330 __func__, vm->vmid,
331 remap_vaddr, (void *)memmap->user_vm_pa, memmap->len);
332 return ret;
333
334unset_region:
335 kfree(regions_info);
336unmap_kernel_map:
337 mutex_lock(&vm->regions_mapping_lock);
338 vm->regions_mapping_count--;
339 mutex_unlock(&vm->regions_mapping_lock);
340unmap_no_count:
341 vunmap(remap_vaddr);
342put_pages:
343 for (i = 0; i < pinned; i++)
344 unpin_user_page(pages[i]);
345free_pages:
346 vfree(pages);
347 return ret;
348}
349
350/**
351 * acrn_vm_all_ram_unmap() - Destroy a RAM EPT mapping of User VM.
352 * @vm: The User VM
353 */
354void acrn_vm_all_ram_unmap(struct acrn_vm *vm)
355{
356 struct vm_memory_mapping *region_mapping;
357 int i, j;
358
359 mutex_lock(&vm->regions_mapping_lock);
360 for (i = 0; i < vm->regions_mapping_count; i++) {
361 region_mapping = &vm->regions_mapping[i];
362 vunmap(region_mapping->service_vm_va);
363 for (j = 0; j < region_mapping->npages; j++)
364 unpin_user_page(region_mapping->pages[j]);
365 vfree(region_mapping->pages);
366 }
367 mutex_unlock(&vm->regions_mapping_lock);
368}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * ACRN: Memory mapping management
4 *
5 * Copyright (C) 2020 Intel Corporation. All rights reserved.
6 *
7 * Authors:
8 * Fei Li <lei1.li@intel.com>
9 * Shuo Liu <shuo.a.liu@intel.com>
10 */
11
12#include <linux/io.h>
13#include <linux/mm.h>
14#include <linux/slab.h>
15
16#include "acrn_drv.h"
17
18static int modify_region(struct acrn_vm *vm, struct vm_memory_region_op *region)
19{
20 struct vm_memory_region_batch *regions;
21 int ret;
22
23 regions = kzalloc(sizeof(*regions), GFP_KERNEL);
24 if (!regions)
25 return -ENOMEM;
26
27 regions->vmid = vm->vmid;
28 regions->regions_num = 1;
29 regions->regions_gpa = virt_to_phys(region);
30
31 ret = hcall_set_memory_regions(virt_to_phys(regions));
32 if (ret < 0)
33 dev_dbg(acrn_dev.this_device,
34 "Failed to set memory region for VM[%u]!\n", vm->vmid);
35
36 kfree(regions);
37 return ret;
38}
39
40/**
41 * acrn_mm_region_add() - Set up the EPT mapping of a memory region.
42 * @vm: User VM.
43 * @user_gpa: A GPA of User VM.
44 * @service_gpa: A GPA of Service VM.
45 * @size: Size of the region.
46 * @mem_type: Combination of ACRN_MEM_TYPE_*.
47 * @mem_access_right: Combination of ACRN_MEM_ACCESS_*.
48 *
49 * Return: 0 on success, <0 on error.
50 */
51int acrn_mm_region_add(struct acrn_vm *vm, u64 user_gpa, u64 service_gpa,
52 u64 size, u32 mem_type, u32 mem_access_right)
53{
54 struct vm_memory_region_op *region;
55 int ret = 0;
56
57 region = kzalloc(sizeof(*region), GFP_KERNEL);
58 if (!region)
59 return -ENOMEM;
60
61 region->type = ACRN_MEM_REGION_ADD;
62 region->user_vm_pa = user_gpa;
63 region->service_vm_pa = service_gpa;
64 region->size = size;
65 region->attr = ((mem_type & ACRN_MEM_TYPE_MASK) |
66 (mem_access_right & ACRN_MEM_ACCESS_RIGHT_MASK));
67 ret = modify_region(vm, region);
68
69 dev_dbg(acrn_dev.this_device,
70 "%s: user-GPA[%pK] service-GPA[%pK] size[0x%llx].\n",
71 __func__, (void *)user_gpa, (void *)service_gpa, size);
72 kfree(region);
73 return ret;
74}
75
76/**
77 * acrn_mm_region_del() - Del the EPT mapping of a memory region.
78 * @vm: User VM.
79 * @user_gpa: A GPA of the User VM.
80 * @size: Size of the region.
81 *
82 * Return: 0 on success, <0 for error.
83 */
84int acrn_mm_region_del(struct acrn_vm *vm, u64 user_gpa, u64 size)
85{
86 struct vm_memory_region_op *region;
87 int ret = 0;
88
89 region = kzalloc(sizeof(*region), GFP_KERNEL);
90 if (!region)
91 return -ENOMEM;
92
93 region->type = ACRN_MEM_REGION_DEL;
94 region->user_vm_pa = user_gpa;
95 region->service_vm_pa = 0UL;
96 region->size = size;
97 region->attr = 0U;
98
99 ret = modify_region(vm, region);
100
101 dev_dbg(acrn_dev.this_device, "%s: user-GPA[%pK] size[0x%llx].\n",
102 __func__, (void *)user_gpa, size);
103 kfree(region);
104 return ret;
105}
106
107int acrn_vm_memseg_map(struct acrn_vm *vm, struct acrn_vm_memmap *memmap)
108{
109 int ret;
110
111 if (memmap->type == ACRN_MEMMAP_RAM)
112 return acrn_vm_ram_map(vm, memmap);
113
114 if (memmap->type != ACRN_MEMMAP_MMIO) {
115 dev_dbg(acrn_dev.this_device,
116 "Invalid memmap type: %u\n", memmap->type);
117 return -EINVAL;
118 }
119
120 ret = acrn_mm_region_add(vm, memmap->user_vm_pa,
121 memmap->service_vm_pa, memmap->len,
122 ACRN_MEM_TYPE_UC, memmap->attr);
123 if (ret < 0)
124 dev_dbg(acrn_dev.this_device,
125 "Add memory region failed, VM[%u]!\n", vm->vmid);
126
127 return ret;
128}
129
130int acrn_vm_memseg_unmap(struct acrn_vm *vm, struct acrn_vm_memmap *memmap)
131{
132 int ret;
133
134 if (memmap->type != ACRN_MEMMAP_MMIO) {
135 dev_dbg(acrn_dev.this_device,
136 "Invalid memmap type: %u\n", memmap->type);
137 return -EINVAL;
138 }
139
140 ret = acrn_mm_region_del(vm, memmap->user_vm_pa, memmap->len);
141 if (ret < 0)
142 dev_dbg(acrn_dev.this_device,
143 "Del memory region failed, VM[%u]!\n", vm->vmid);
144
145 return ret;
146}
147
148/**
149 * acrn_vm_ram_map() - Create a RAM EPT mapping of User VM.
150 * @vm: The User VM pointer
151 * @memmap: Info of the EPT mapping
152 *
153 * Return: 0 on success, <0 for error.
154 */
155int acrn_vm_ram_map(struct acrn_vm *vm, struct acrn_vm_memmap *memmap)
156{
157 struct vm_memory_region_batch *regions_info;
158 int nr_pages, i = 0, order, nr_regions = 0;
159 struct vm_memory_mapping *region_mapping;
160 struct vm_memory_region_op *vm_region;
161 struct page **pages = NULL, *page;
162 void *remap_vaddr;
163 int ret, pinned;
164 u64 user_vm_pa;
165 unsigned long pfn;
166 struct vm_area_struct *vma;
167
168 if (!vm || !memmap)
169 return -EINVAL;
170
171 mmap_read_lock(current->mm);
172 vma = vma_lookup(current->mm, memmap->vma_base);
173 if (vma && ((vma->vm_flags & VM_PFNMAP) != 0)) {
174 if ((memmap->vma_base + memmap->len) > vma->vm_end) {
175 mmap_read_unlock(current->mm);
176 return -EINVAL;
177 }
178
179 ret = follow_pfn(vma, memmap->vma_base, &pfn);
180 mmap_read_unlock(current->mm);
181 if (ret < 0) {
182 dev_dbg(acrn_dev.this_device,
183 "Failed to lookup PFN at VMA:%pK.\n", (void *)memmap->vma_base);
184 return ret;
185 }
186
187 return acrn_mm_region_add(vm, memmap->user_vm_pa,
188 PFN_PHYS(pfn), memmap->len,
189 ACRN_MEM_TYPE_WB, memmap->attr);
190 }
191 mmap_read_unlock(current->mm);
192
193 /* Get the page number of the map region */
194 nr_pages = memmap->len >> PAGE_SHIFT;
195 pages = vzalloc(array_size(nr_pages, sizeof(*pages)));
196 if (!pages)
197 return -ENOMEM;
198
199 /* Lock the pages of user memory map region */
200 pinned = pin_user_pages_fast(memmap->vma_base,
201 nr_pages, FOLL_WRITE | FOLL_LONGTERM,
202 pages);
203 if (pinned < 0) {
204 ret = pinned;
205 goto free_pages;
206 } else if (pinned != nr_pages) {
207 ret = -EFAULT;
208 goto put_pages;
209 }
210
211 /* Create a kernel map for the map region */
212 remap_vaddr = vmap(pages, nr_pages, VM_MAP, PAGE_KERNEL);
213 if (!remap_vaddr) {
214 ret = -ENOMEM;
215 goto put_pages;
216 }
217
218 /* Record Service VM va <-> User VM pa mapping */
219 mutex_lock(&vm->regions_mapping_lock);
220 region_mapping = &vm->regions_mapping[vm->regions_mapping_count];
221 if (vm->regions_mapping_count < ACRN_MEM_MAPPING_MAX) {
222 region_mapping->pages = pages;
223 region_mapping->npages = nr_pages;
224 region_mapping->size = memmap->len;
225 region_mapping->service_vm_va = remap_vaddr;
226 region_mapping->user_vm_pa = memmap->user_vm_pa;
227 vm->regions_mapping_count++;
228 } else {
229 dev_warn(acrn_dev.this_device,
230 "Run out of memory mapping slots!\n");
231 ret = -ENOMEM;
232 mutex_unlock(&vm->regions_mapping_lock);
233 goto unmap_no_count;
234 }
235 mutex_unlock(&vm->regions_mapping_lock);
236
237 /* Calculate count of vm_memory_region_op */
238 while (i < nr_pages) {
239 page = pages[i];
240 VM_BUG_ON_PAGE(PageTail(page), page);
241 order = compound_order(page);
242 nr_regions++;
243 i += 1 << order;
244 }
245
246 /* Prepare the vm_memory_region_batch */
247 regions_info = kzalloc(struct_size(regions_info, regions_op,
248 nr_regions), GFP_KERNEL);
249 if (!regions_info) {
250 ret = -ENOMEM;
251 goto unmap_kernel_map;
252 }
253 regions_info->regions_num = nr_regions;
254
255 /* Fill each vm_memory_region_op */
256 vm_region = regions_info->regions_op;
257 regions_info->vmid = vm->vmid;
258 regions_info->regions_gpa = virt_to_phys(vm_region);
259 user_vm_pa = memmap->user_vm_pa;
260 i = 0;
261 while (i < nr_pages) {
262 u32 region_size;
263
264 page = pages[i];
265 VM_BUG_ON_PAGE(PageTail(page), page);
266 order = compound_order(page);
267 region_size = PAGE_SIZE << order;
268 vm_region->type = ACRN_MEM_REGION_ADD;
269 vm_region->user_vm_pa = user_vm_pa;
270 vm_region->service_vm_pa = page_to_phys(page);
271 vm_region->size = region_size;
272 vm_region->attr = (ACRN_MEM_TYPE_WB & ACRN_MEM_TYPE_MASK) |
273 (memmap->attr & ACRN_MEM_ACCESS_RIGHT_MASK);
274
275 vm_region++;
276 user_vm_pa += region_size;
277 i += 1 << order;
278 }
279
280 /* Inform the ACRN Hypervisor to set up EPT mappings */
281 ret = hcall_set_memory_regions(virt_to_phys(regions_info));
282 if (ret < 0) {
283 dev_dbg(acrn_dev.this_device,
284 "Failed to set regions, VM[%u]!\n", vm->vmid);
285 goto unset_region;
286 }
287 kfree(regions_info);
288
289 dev_dbg(acrn_dev.this_device,
290 "%s: VM[%u] service-GVA[%pK] user-GPA[%pK] size[0x%llx]\n",
291 __func__, vm->vmid,
292 remap_vaddr, (void *)memmap->user_vm_pa, memmap->len);
293 return ret;
294
295unset_region:
296 kfree(regions_info);
297unmap_kernel_map:
298 mutex_lock(&vm->regions_mapping_lock);
299 vm->regions_mapping_count--;
300 mutex_unlock(&vm->regions_mapping_lock);
301unmap_no_count:
302 vunmap(remap_vaddr);
303put_pages:
304 for (i = 0; i < pinned; i++)
305 unpin_user_page(pages[i]);
306free_pages:
307 vfree(pages);
308 return ret;
309}
310
311/**
312 * acrn_vm_all_ram_unmap() - Destroy a RAM EPT mapping of User VM.
313 * @vm: The User VM
314 */
315void acrn_vm_all_ram_unmap(struct acrn_vm *vm)
316{
317 struct vm_memory_mapping *region_mapping;
318 int i, j;
319
320 mutex_lock(&vm->regions_mapping_lock);
321 for (i = 0; i < vm->regions_mapping_count; i++) {
322 region_mapping = &vm->regions_mapping[i];
323 vunmap(region_mapping->service_vm_va);
324 for (j = 0; j < region_mapping->npages; j++)
325 unpin_user_page(region_mapping->pages[j]);
326 vfree(region_mapping->pages);
327 }
328 mutex_unlock(&vm->regions_mapping_lock);
329}