2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Zhi Wang <zhi.a.wang@intel.com>
25 * Zhenyu Wang <zhenyuw@linux.intel.com>
26 * Xiao Zheng <xiao.zheng@intel.com>
29 * Min He <min.he@intel.com>
30 * Bing Niu <bing.niu@intel.com>
37 #define GTT_PAGE_SHIFT 12
38 #define GTT_PAGE_SIZE (1UL << GTT_PAGE_SHIFT)
39 #define GTT_PAGE_MASK (~(GTT_PAGE_SIZE-1))
43 #define INTEL_GVT_GTT_HASH_BITS 8
44 #define INTEL_GVT_INVALID_ADDR (~0UL)
46 struct intel_gvt_gtt_entry {
51 struct intel_gvt_gtt_pte_ops {
52 struct intel_gvt_gtt_entry *(*get_entry)(void *pt,
53 struct intel_gvt_gtt_entry *e,
54 unsigned long index, bool hypervisor_access, unsigned long gpa,
55 struct intel_vgpu *vgpu);
56 struct intel_gvt_gtt_entry *(*set_entry)(void *pt,
57 struct intel_gvt_gtt_entry *e,
58 unsigned long index, bool hypervisor_access, unsigned long gpa,
59 struct intel_vgpu *vgpu);
60 bool (*test_present)(struct intel_gvt_gtt_entry *e);
61 void (*clear_present)(struct intel_gvt_gtt_entry *e);
62 bool (*test_pse)(struct intel_gvt_gtt_entry *e);
63 void (*set_pfn)(struct intel_gvt_gtt_entry *e, unsigned long pfn);
64 unsigned long (*get_pfn)(struct intel_gvt_gtt_entry *e);
67 struct intel_gvt_gtt_gma_ops {
68 unsigned long (*gma_to_ggtt_pte_index)(unsigned long gma);
69 unsigned long (*gma_to_pte_index)(unsigned long gma);
70 unsigned long (*gma_to_pde_index)(unsigned long gma);
71 unsigned long (*gma_to_l3_pdp_index)(unsigned long gma);
72 unsigned long (*gma_to_l4_pdp_index)(unsigned long gma);
73 unsigned long (*gma_to_pml4_index)(unsigned long gma);
76 struct intel_gvt_gtt {
77 struct intel_gvt_gtt_pte_ops *pte_ops;
78 struct intel_gvt_gtt_gma_ops *gma_ops;
79 int (*mm_alloc_page_table)(struct intel_vgpu_mm *mm);
80 void (*mm_free_page_table)(struct intel_vgpu_mm *mm);
81 struct list_head oos_page_use_list_head;
82 struct list_head oos_page_free_list_head;
83 struct list_head mm_lru_list_head;
87 INTEL_GVT_MM_GGTT = 0,
92 GTT_TYPE_INVALID = -1,
96 GTT_TYPE_PPGTT_PTE_4K_ENTRY,
97 GTT_TYPE_PPGTT_PTE_2M_ENTRY,
98 GTT_TYPE_PPGTT_PTE_1G_ENTRY,
100 GTT_TYPE_PPGTT_PTE_ENTRY,
102 GTT_TYPE_PPGTT_PDE_ENTRY,
103 GTT_TYPE_PPGTT_PDP_ENTRY,
104 GTT_TYPE_PPGTT_PML4_ENTRY,
106 GTT_TYPE_PPGTT_ROOT_ENTRY,
108 GTT_TYPE_PPGTT_ROOT_L3_ENTRY,
109 GTT_TYPE_PPGTT_ROOT_L4_ENTRY,
111 GTT_TYPE_PPGTT_ENTRY,
113 GTT_TYPE_PPGTT_PTE_PT,
114 GTT_TYPE_PPGTT_PDE_PT,
115 GTT_TYPE_PPGTT_PDP_PT,
116 GTT_TYPE_PPGTT_PML4_PT,
119 } intel_gvt_gtt_type_t;
121 struct intel_vgpu_mm {
126 int page_table_entry_type;
127 u32 page_table_entry_size;
128 u32 page_table_entry_cnt;
129 void *virtual_page_table;
130 void *shadow_page_table;
132 int page_table_level;
133 bool has_shadow_page_table;
136 struct list_head list;
139 struct list_head lru_list;
140 struct intel_vgpu *vgpu;
143 extern struct intel_gvt_gtt_entry *intel_vgpu_mm_get_entry(
144 struct intel_vgpu_mm *mm,
145 void *page_table, struct intel_gvt_gtt_entry *e,
146 unsigned long index);
148 extern struct intel_gvt_gtt_entry *intel_vgpu_mm_set_entry(
149 struct intel_vgpu_mm *mm,
150 void *page_table, struct intel_gvt_gtt_entry *e,
151 unsigned long index);
153 #define ggtt_get_guest_entry(mm, e, index) \
154 intel_vgpu_mm_get_entry(mm, mm->virtual_page_table, e, index)
156 #define ggtt_set_guest_entry(mm, e, index) \
157 intel_vgpu_mm_set_entry(mm, mm->virtual_page_table, e, index)
159 #define ggtt_get_shadow_entry(mm, e, index) \
160 intel_vgpu_mm_get_entry(mm, mm->shadow_page_table, e, index)
162 #define ggtt_set_shadow_entry(mm, e, index) \
163 intel_vgpu_mm_set_entry(mm, mm->shadow_page_table, e, index)
165 #define ppgtt_get_guest_root_entry(mm, e, index) \
166 intel_vgpu_mm_get_entry(mm, mm->virtual_page_table, e, index)
168 #define ppgtt_set_guest_root_entry(mm, e, index) \
169 intel_vgpu_mm_set_entry(mm, mm->virtual_page_table, e, index)
171 #define ppgtt_get_shadow_root_entry(mm, e, index) \
172 intel_vgpu_mm_get_entry(mm, mm->shadow_page_table, e, index)
174 #define ppgtt_set_shadow_root_entry(mm, e, index) \
175 intel_vgpu_mm_set_entry(mm, mm->shadow_page_table, e, index)
177 extern struct intel_vgpu_mm *intel_vgpu_create_mm(struct intel_vgpu *vgpu,
178 int mm_type, void *virtual_page_table, int page_table_level,
180 extern void intel_vgpu_destroy_mm(struct kref *mm_ref);
182 struct intel_vgpu_guest_page;
184 struct intel_vgpu_scratch_pt {
186 unsigned long page_mfn;
190 struct intel_vgpu_gtt {
191 struct intel_vgpu_mm *ggtt_mm;
192 unsigned long active_ppgtt_mm_bitmap;
193 struct list_head mm_list_head;
194 DECLARE_HASHTABLE(shadow_page_hash_table, INTEL_GVT_GTT_HASH_BITS);
195 DECLARE_HASHTABLE(guest_page_hash_table, INTEL_GVT_GTT_HASH_BITS);
196 atomic_t n_write_protected_guest_page;
197 struct list_head oos_page_list_head;
198 struct list_head post_shadow_list_head;
199 struct intel_vgpu_scratch_pt scratch_pt[GTT_TYPE_MAX];
203 extern int intel_vgpu_init_gtt(struct intel_vgpu *vgpu);
204 extern void intel_vgpu_clean_gtt(struct intel_vgpu *vgpu);
206 extern int intel_gvt_init_gtt(struct intel_gvt *gvt);
207 extern void intel_gvt_clean_gtt(struct intel_gvt *gvt);
209 extern struct intel_vgpu_mm *intel_gvt_find_ppgtt_mm(struct intel_vgpu *vgpu,
210 int page_table_level, void *root_entry);
212 struct intel_vgpu_oos_page;
214 struct intel_vgpu_shadow_page {
218 struct hlist_node node;
222 struct intel_vgpu_guest_page {
223 struct hlist_node node;
224 bool writeprotection;
226 int (*handler)(void *, u64, void *, int);
228 unsigned long write_cnt;
229 struct intel_vgpu_oos_page *oos_page;
232 struct intel_vgpu_oos_page {
233 struct intel_vgpu_guest_page *guest_page;
234 struct list_head list;
235 struct list_head vm_list;
237 unsigned char mem[GTT_PAGE_SIZE];
240 #define GTT_ENTRY_NUM_IN_ONE_PAGE 512
242 struct intel_vgpu_ppgtt_spt {
243 struct intel_vgpu_shadow_page shadow_page;
244 struct intel_vgpu_guest_page guest_page;
247 struct intel_vgpu *vgpu;
248 DECLARE_BITMAP(post_shadow_bitmap, GTT_ENTRY_NUM_IN_ONE_PAGE);
249 struct list_head post_shadow_list;
252 int intel_vgpu_init_guest_page(struct intel_vgpu *vgpu,
253 struct intel_vgpu_guest_page *guest_page,
255 int (*handler)(void *gp, u64, void *, int),
258 void intel_vgpu_clean_guest_page(struct intel_vgpu *vgpu,
259 struct intel_vgpu_guest_page *guest_page);
261 int intel_vgpu_set_guest_page_writeprotection(struct intel_vgpu *vgpu,
262 struct intel_vgpu_guest_page *guest_page);
264 void intel_vgpu_clear_guest_page_writeprotection(struct intel_vgpu *vgpu,
265 struct intel_vgpu_guest_page *guest_page);
267 struct intel_vgpu_guest_page *intel_vgpu_find_guest_page(
268 struct intel_vgpu *vgpu, unsigned long gfn);
270 int intel_vgpu_sync_oos_pages(struct intel_vgpu *vgpu);
272 int intel_vgpu_flush_post_shadow(struct intel_vgpu *vgpu);
274 static inline void intel_gvt_mm_reference(struct intel_vgpu_mm *mm)
279 static inline void intel_gvt_mm_unreference(struct intel_vgpu_mm *mm)
281 kref_put(&mm->ref, intel_vgpu_destroy_mm);
284 int intel_vgpu_pin_mm(struct intel_vgpu_mm *mm);
286 void intel_vgpu_unpin_mm(struct intel_vgpu_mm *mm);
288 unsigned long intel_vgpu_gma_to_gpa(struct intel_vgpu_mm *mm,
291 struct intel_vgpu_mm *intel_vgpu_find_ppgtt_mm(struct intel_vgpu *vgpu,
292 int page_table_level, void *root_entry);
294 int intel_vgpu_g2v_create_ppgtt_mm(struct intel_vgpu *vgpu,
295 int page_table_level);
297 int intel_vgpu_g2v_destroy_ppgtt_mm(struct intel_vgpu *vgpu,
298 int page_table_level);
300 int intel_vgpu_emulate_gtt_mmio_read(struct intel_vgpu *vgpu,
301 unsigned int off, void *p_data, unsigned int bytes);
303 int intel_vgpu_emulate_gtt_mmio_write(struct intel_vgpu *vgpu,
304 unsigned int off, void *p_data, unsigned int bytes);
306 #endif /* _GVT_GTT_H_ */