1 /* 2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved. 3 * 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: 10 * 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 13 * Software. 14 * 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 21 * SOFTWARE. 22 * 23 * Authors: 24 * Zhi Wang <zhi.a.wang@intel.com> 25 * Zhenyu Wang <zhenyuw@linux.intel.com> 26 * Xiao Zheng <xiao.zheng@intel.com> 27 * 28 * Contributors: 29 * Min He <min.he@intel.com> 30 * Bing Niu <bing.niu@intel.com> 31 * 32 */ 33 34 #ifndef _GVT_GTT_H_ 35 #define _GVT_GTT_H_ 36 37 #define GTT_PAGE_SHIFT 12 38 #define GTT_PAGE_SIZE (1UL << GTT_PAGE_SHIFT) 39 #define GTT_PAGE_MASK (~(GTT_PAGE_SIZE-1)) 40 41 struct intel_vgpu_mm; 42 43 #define INTEL_GVT_GTT_HASH_BITS 8 44 #define INTEL_GVT_INVALID_ADDR (~0UL) 45 46 struct intel_gvt_gtt_entry { 47 u64 val64; 48 int type; 49 }; 50 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); 65 }; 66 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); 74 }; 75 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; 84 }; 85 86 enum { 87 INTEL_GVT_MM_GGTT = 0, 88 INTEL_GVT_MM_PPGTT, 89 }; 90 91 struct intel_vgpu_mm { 92 int type; 93 bool initialized; 94 bool shadowed; 95 96 int page_table_entry_type; 97 u32 page_table_entry_size; 98 u32 page_table_entry_cnt; 99 void *virtual_page_table; 100 void *shadow_page_table; 101 102 int page_table_level; 103 bool has_shadow_page_table; 104 u32 pde_base_index; 105 106 struct list_head list; 107 struct kref ref; 108 atomic_t pincount; 109 struct list_head lru_list; 110 struct intel_vgpu *vgpu; 111 }; 112 113 extern struct intel_gvt_gtt_entry *intel_vgpu_mm_get_entry( 114 struct intel_vgpu_mm *mm, 115 void *page_table, struct intel_gvt_gtt_entry *e, 116 unsigned long index); 117 118 extern struct intel_gvt_gtt_entry *intel_vgpu_mm_set_entry( 119 struct intel_vgpu_mm *mm, 120 void *page_table, struct intel_gvt_gtt_entry *e, 121 unsigned long index); 122 123 #define ggtt_get_guest_entry(mm, e, index) \ 124 intel_vgpu_mm_get_entry(mm, mm->virtual_page_table, e, index) 125 126 #define ggtt_set_guest_entry(mm, e, index) \ 127 intel_vgpu_mm_set_entry(mm, mm->virtual_page_table, e, index) 128 129 #define ggtt_get_shadow_entry(mm, e, index) \ 130 intel_vgpu_mm_get_entry(mm, mm->shadow_page_table, e, index) 131 132 #define ggtt_set_shadow_entry(mm, e, index) \ 133 intel_vgpu_mm_set_entry(mm, mm->shadow_page_table, e, index) 134 135 #define ppgtt_get_guest_root_entry(mm, e, index) \ 136 intel_vgpu_mm_get_entry(mm, mm->virtual_page_table, e, index) 137 138 #define ppgtt_set_guest_root_entry(mm, e, index) \ 139 intel_vgpu_mm_set_entry(mm, mm->virtual_page_table, e, index) 140 141 #define ppgtt_get_shadow_root_entry(mm, e, index) \ 142 intel_vgpu_mm_get_entry(mm, mm->shadow_page_table, e, index) 143 144 #define ppgtt_set_shadow_root_entry(mm, e, index) \ 145 intel_vgpu_mm_set_entry(mm, mm->shadow_page_table, e, index) 146 147 extern struct intel_vgpu_mm *intel_vgpu_create_mm(struct intel_vgpu *vgpu, 148 int mm_type, void *virtual_page_table, int page_table_level, 149 u32 pde_base_index); 150 extern void intel_vgpu_destroy_mm(struct kref *mm_ref); 151 152 struct intel_vgpu_guest_page; 153 154 struct intel_vgpu_gtt { 155 struct intel_vgpu_mm *ggtt_mm; 156 unsigned long active_ppgtt_mm_bitmap; 157 struct list_head mm_list_head; 158 DECLARE_HASHTABLE(shadow_page_hash_table, INTEL_GVT_GTT_HASH_BITS); 159 DECLARE_HASHTABLE(guest_page_hash_table, INTEL_GVT_GTT_HASH_BITS); 160 atomic_t n_write_protected_guest_page; 161 struct list_head oos_page_list_head; 162 struct list_head post_shadow_list_head; 163 struct page *scratch_page; 164 unsigned long scratch_page_mfn; 165 }; 166 167 extern int intel_vgpu_init_gtt(struct intel_vgpu *vgpu); 168 extern void intel_vgpu_clean_gtt(struct intel_vgpu *vgpu); 169 170 extern int intel_gvt_init_gtt(struct intel_gvt *gvt); 171 extern void intel_gvt_clean_gtt(struct intel_gvt *gvt); 172 173 extern struct intel_vgpu_mm *intel_gvt_find_ppgtt_mm(struct intel_vgpu *vgpu, 174 int page_table_level, void *root_entry); 175 176 struct intel_vgpu_oos_page; 177 178 struct intel_vgpu_shadow_page { 179 void *vaddr; 180 struct page *page; 181 int type; 182 struct hlist_node node; 183 unsigned long mfn; 184 }; 185 186 struct intel_vgpu_guest_page { 187 struct hlist_node node; 188 bool writeprotection; 189 unsigned long gfn; 190 int (*handler)(void *, u64, void *, int); 191 void *data; 192 unsigned long write_cnt; 193 struct intel_vgpu_oos_page *oos_page; 194 }; 195 196 struct intel_vgpu_oos_page { 197 struct intel_vgpu_guest_page *guest_page; 198 struct list_head list; 199 struct list_head vm_list; 200 int id; 201 unsigned char mem[GTT_PAGE_SIZE]; 202 }; 203 204 #define GTT_ENTRY_NUM_IN_ONE_PAGE 512 205 206 struct intel_vgpu_ppgtt_spt { 207 struct intel_vgpu_shadow_page shadow_page; 208 struct intel_vgpu_guest_page guest_page; 209 int guest_page_type; 210 atomic_t refcount; 211 struct intel_vgpu *vgpu; 212 DECLARE_BITMAP(post_shadow_bitmap, GTT_ENTRY_NUM_IN_ONE_PAGE); 213 struct list_head post_shadow_list; 214 }; 215 216 int intel_vgpu_init_guest_page(struct intel_vgpu *vgpu, 217 struct intel_vgpu_guest_page *guest_page, 218 unsigned long gfn, 219 int (*handler)(void *gp, u64, void *, int), 220 void *data); 221 222 void intel_vgpu_clean_guest_page(struct intel_vgpu *vgpu, 223 struct intel_vgpu_guest_page *guest_page); 224 225 int intel_vgpu_set_guest_page_writeprotection(struct intel_vgpu *vgpu, 226 struct intel_vgpu_guest_page *guest_page); 227 228 void intel_vgpu_clear_guest_page_writeprotection(struct intel_vgpu *vgpu, 229 struct intel_vgpu_guest_page *guest_page); 230 231 struct intel_vgpu_guest_page *intel_vgpu_find_guest_page( 232 struct intel_vgpu *vgpu, unsigned long gfn); 233 234 int intel_vgpu_sync_oos_pages(struct intel_vgpu *vgpu); 235 236 int intel_vgpu_flush_post_shadow(struct intel_vgpu *vgpu); 237 238 static inline void intel_gvt_mm_reference(struct intel_vgpu_mm *mm) 239 { 240 kref_get(&mm->ref); 241 } 242 243 static inline void intel_gvt_mm_unreference(struct intel_vgpu_mm *mm) 244 { 245 kref_put(&mm->ref, intel_vgpu_destroy_mm); 246 } 247 248 int intel_vgpu_pin_mm(struct intel_vgpu_mm *mm); 249 250 void intel_vgpu_unpin_mm(struct intel_vgpu_mm *mm); 251 252 unsigned long intel_vgpu_gma_to_gpa(struct intel_vgpu_mm *mm, 253 unsigned long gma); 254 255 struct intel_vgpu_mm *intel_vgpu_find_ppgtt_mm(struct intel_vgpu *vgpu, 256 int page_table_level, void *root_entry); 257 258 int intel_vgpu_g2v_create_ppgtt_mm(struct intel_vgpu *vgpu, 259 int page_table_level); 260 261 int intel_vgpu_g2v_destroy_ppgtt_mm(struct intel_vgpu *vgpu, 262 int page_table_level); 263 264 int intel_vgpu_emulate_gtt_mmio_read(struct intel_vgpu *vgpu, 265 unsigned int off, void *p_data, unsigned int bytes); 266 267 int intel_vgpu_emulate_gtt_mmio_write(struct intel_vgpu *vgpu, 268 unsigned int off, void *p_data, unsigned int bytes); 269 270 #endif /* _GVT_GTT_H_ */ 271