2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
21 static inline int activate_shadow_pt_64(struct guest_info * info) {
22 struct cr3_64 * shadow_cr3 = (struct cr3_64 *)&(info->ctrl_regs.cr3);
23 struct cr3_64 * guest_cr3 = (struct cr3_64 *)&(info->shdw_pg_state.guest_cr3);
24 struct shadow_page_data * shadow_pt = create_new_shadow_pt(info);
25 addr_t shadow_pt_addr = shadow_pt->page_pa;
27 // Because this is a new CR3 load the allocated page is the new CR3 value
28 shadow_pt->cr3 = shadow_pt->page_pa;
30 PrintDebug("Top level Shadow page pa=%p\n", (void *)shadow_pt_addr);
32 shadow_cr3->pml4t_base_addr = PAGE_BASE_ADDR_4KB(shadow_pt_addr);
33 PrintDebug("Creating new 64 bit shadow page table %p\n", (void *)BASE_TO_PAGE_ADDR(shadow_cr3->pml4t_base_addr));
36 shadow_cr3->pwt = guest_cr3->pwt;
37 shadow_cr3->pcd = guest_cr3->pcd;
50 * * 64 bit Page table fault handlers
55 static int handle_2MB_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
56 pte64_t * shadow_pt, pde64_2MB_t * large_guest_pde);
58 static int handle_pte_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
59 pte64_t * shadow_pt, pte64_t * guest_pt);
61 static int handle_pde_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
62 pde64_t * shadow_pd, pde64_t * guest_pd);
64 static int handle_pdpe_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
65 pdpe64_t * shadow_pdp, pdpe64_t * guest_pdp);
68 static inline int handle_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code) {
69 pml4e64_t * guest_pml = NULL;
70 pml4e64_t * shadow_pml = CR3_TO_PML4E64_VA(info->ctrl_regs.cr3);
71 addr_t guest_cr3 = CR3_TO_PML4E64_PA(info->shdw_pg_state.guest_cr3);
72 pt_access_status_t guest_pml4e_access;
73 pt_access_status_t shadow_pml4e_access;
74 pml4e64_t * guest_pml4e = NULL;
75 pml4e64_t * shadow_pml4e = (pml4e64_t *)&(shadow_pml[PML4E64_INDEX(fault_addr)]);
77 PrintDebug("64 bit Shadow page fault handler: %p\n", (void *)fault_addr);
78 PrintDebug("Handling PML fault\n");
80 if (guest_pa_to_host_va(info, guest_cr3, (addr_t*)&guest_pml) == -1) {
81 PrintError("Invalid Guest PML4E Address: 0x%p\n", (void *)guest_cr3);
85 guest_pml4e = (pml4e64_t *)&(guest_pml[PML4E64_INDEX(fault_addr)]);
87 PrintDebug("Checking Guest %p\n", (void *)guest_pml);
88 // Check the guest page permissions
89 guest_pml4e_access = v3_can_access_pml4e64(guest_pml, fault_addr, error_code);
91 PrintDebug("Checking shadow %p\n", (void *)shadow_pml);
92 // Check the shadow page permissions
93 shadow_pml4e_access = v3_can_access_pml4e64(shadow_pml, fault_addr, error_code);
95 /* Was the page fault caused by the Guest's page tables? */
96 if (is_guest_pf(guest_pml4e_access, shadow_pml4e_access) == 1) {
97 PrintDebug("Injecting PML4E pf to guest: (guest access error=%d) (pf error code=%d)\n",
98 *(uint_t *)&guest_pml4e_access, *(uint_t *)&error_code);
99 inject_guest_pf(info, fault_addr, error_code);
103 if (shadow_pml4e_access == PT_ACCESS_USER_ERROR) {
105 // PML4 Entry marked non-user
107 PrintDebug("Shadow Paging User access error (shadow_pml4e_access=0x%x, guest_pml4e_access=0x%x)\n",
108 shadow_pml4e_access, guest_pml4e_access);
109 inject_guest_pf(info, fault_addr, error_code);
111 } else if ((shadow_pml4e_access != PT_ACCESS_NOT_PRESENT) &&
112 (shadow_pml4e_access != PT_ACCESS_OK)) {
113 // inject page fault in guest
114 inject_guest_pf(info, fault_addr, error_code);
115 PrintDebug("Unknown Error occurred (shadow_pde_access=%d)\n", shadow_pml4e_access);
116 PrintDebug("Manual Says to inject page fault into guest\n");
121 pdpe64_t * shadow_pdp = NULL;
122 pdpe64_t * guest_pdp = NULL;
124 // Get the next shadow page level, allocate if not present
126 if (shadow_pml4e_access == PT_ACCESS_NOT_PRESENT) {
127 struct shadow_page_data * shdw_page = create_new_shadow_pt(info);
128 shadow_pdp = (pdpe64_t *)V3_VAddr((void *)shdw_page->page_pa);
131 shadow_pml4e->present = 1;
132 shadow_pml4e->user_page = guest_pml4e->user_page;
133 shadow_pml4e->writable = guest_pml4e->writable;
135 // VMM Specific options
136 shadow_pml4e->write_through = 0;
137 shadow_pml4e->cache_disable = 0;
140 guest_pml4e->accessed = 1;
142 shadow_pml4e->pdp_base_addr = PAGE_BASE_ADDR(shdw_page->page_pa);
144 shadow_pdp = (pdpe64_t *)V3_VAddr((void *)(addr_t)BASE_TO_PAGE_ADDR(shadow_pml4e->pdp_base_addr));
147 // Continue processing at the next level
149 if (guest_pa_to_host_va(info, BASE_TO_PAGE_ADDR(guest_pml4e->pdp_base_addr), (addr_t *)&guest_pdp) == -1) {
150 // Machine check the guest
151 PrintDebug("Invalid Guest PDP Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pml4e->pdp_base_addr));
152 v3_raise_exception(info, MC_EXCEPTION);
156 if (handle_pdpe_shadow_pagefault_64(info, fault_addr, error_code, shadow_pdp, guest_pdp) == -1) {
157 PrintError("Error handling Page fault caused by PDPE\n");
166 // For now we are not going to handle 1 Gigabyte pages
167 static int handle_pdpe_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
168 pdpe64_t * shadow_pdp, pdpe64_t * guest_pdp) {
169 pt_access_status_t guest_pdpe_access;
170 pt_access_status_t shadow_pdpe_access;
171 pdpe64_t * guest_pdpe = (pdpe64_t *)&(guest_pdp[PDPE64_INDEX(fault_addr)]);
172 pdpe64_t * shadow_pdpe = (pdpe64_t *)&(shadow_pdp[PDPE64_INDEX(fault_addr)]);
174 PrintDebug("Handling PDP fault\n");
176 // Check the guest page permissions
177 guest_pdpe_access = v3_can_access_pdpe64(guest_pdp, fault_addr, error_code);
179 // Check the shadow page permissions
180 shadow_pdpe_access = v3_can_access_pdpe64(shadow_pdp, fault_addr, error_code);
182 /* Was the page fault caused by the Guest's page tables? */
183 if (is_guest_pf(guest_pdpe_access, shadow_pdpe_access) == 1) {
184 PrintDebug("Injecting PDPE pf to guest: (guest access error=%d) (pf error code=%d)\n",
185 *(uint_t *)&guest_pdpe_access, *(uint_t *)&error_code);
186 inject_guest_pf(info, fault_addr, error_code);
190 if (shadow_pdpe_access == PT_ACCESS_USER_ERROR) {
192 // PML4 Entry marked non-user
194 PrintDebug("Shadow Paging User access error (shadow_pdpe_access=0x%x, guest_pdpe_access=0x%x)\n",
195 shadow_pdpe_access, guest_pdpe_access);
196 inject_guest_pf(info, fault_addr, error_code);
198 } else if ((shadow_pdpe_access != PT_ACCESS_NOT_PRESENT) &&
199 (shadow_pdpe_access != PT_ACCESS_OK)) {
200 // inject page fault in guest
201 inject_guest_pf(info, fault_addr, error_code);
202 PrintDebug("Unknown Error occurred (shadow_pde_access=%d)\n", shadow_pdpe_access);
203 PrintDebug("Manual Says to inject page fault into guest\n");
208 pde64_t * shadow_pd = NULL;
209 pde64_t * guest_pd = NULL;
211 // Get the next shadow page level, allocate if not present
213 if (shadow_pdpe_access == PT_ACCESS_NOT_PRESENT) {
214 struct shadow_page_data * shdw_page = create_new_shadow_pt(info);
215 shadow_pd = (pde64_t *)V3_VAddr((void *)shdw_page->page_pa);
218 shadow_pdpe->present = 1;
219 shadow_pdpe->user_page = guest_pdpe->user_page;
220 shadow_pdpe->writable = guest_pdpe->writable;
222 // VMM Specific options
223 shadow_pdpe->write_through = 0;
224 shadow_pdpe->cache_disable = 0;
227 guest_pdpe->accessed = 1;
229 shadow_pdpe->pd_base_addr = PAGE_BASE_ADDR(shdw_page->page_pa);
231 shadow_pd = (pde64_t *)V3_VAddr((void *)(addr_t)BASE_TO_PAGE_ADDR(shadow_pdpe->pd_base_addr));
234 // Continue processing at the next level
236 if (guest_pa_to_host_va(info, BASE_TO_PAGE_ADDR(guest_pdpe->pd_base_addr), (addr_t *)&guest_pd) == -1) {
237 // Machine check the guest
238 PrintDebug("Invalid Guest PTE Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pdpe->pd_base_addr));
239 v3_raise_exception(info, MC_EXCEPTION);
243 if (handle_pde_shadow_pagefault_64(info, fault_addr, error_code, shadow_pd, guest_pd) == -1) {
244 PrintError("Error handling Page fault caused by PDE\n");
252 static int handle_pde_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
253 pde64_t * shadow_pd, pde64_t * guest_pd) {
254 pt_access_status_t guest_pde_access;
255 pt_access_status_t shadow_pde_access;
256 pde64_t * guest_pde = (pde64_t *)&(guest_pd[PDE64_INDEX(fault_addr)]);
257 pde64_t * shadow_pde = (pde64_t *)&(shadow_pd[PDE64_INDEX(fault_addr)]);
259 PrintDebug("Handling PDE fault\n");
261 // Check the guest page permissions
262 guest_pde_access = v3_can_access_pde64(guest_pd, fault_addr, error_code);
264 // Check the shadow page permissions
265 shadow_pde_access = v3_can_access_pde64(shadow_pd, fault_addr, error_code);
267 /* Was the page fault caused by the Guest's page tables? */
268 if (is_guest_pf(guest_pde_access, shadow_pde_access) == 1) {
269 PrintDebug("Injecting PDE pf to guest: (guest access error=%d) (pf error code=%d)\n",
270 *(uint_t *)&guest_pde_access, *(uint_t *)&error_code);
271 inject_guest_pf(info, fault_addr, error_code);
275 if (shadow_pde_access == PT_ACCESS_USER_ERROR) {
277 // PDE Entry marked non-user
279 PrintDebug("Shadow Paging User access error (shadow_pdpe_access=0x%x, guest_pdpe_access=0x%x)\n",
280 shadow_pde_access, guest_pde_access);
281 inject_guest_pf(info, fault_addr, error_code);
284 } else if ((shadow_pde_access == PT_ACCESS_WRITE_ERROR) &&
285 (guest_pde->large_page == 1)) {
287 ((pde64_2MB_t *)guest_pde)->dirty = 1;
288 shadow_pde->writable = guest_pde->writable;
290 //PrintDebug("Returning due to large page Write Error\n");
291 //PrintHostPageTree(info, fault_addr, info->ctrl_regs.cr3);
294 } else if ((shadow_pde_access != PT_ACCESS_NOT_PRESENT) &&
295 (shadow_pde_access != PT_ACCESS_OK)) {
296 // inject page fault in guest
297 inject_guest_pf(info, fault_addr, error_code);
298 PrintDebug("Unknown Error occurred (shadow_pde_access=%d)\n", shadow_pde_access);
299 PrintDebug("Manual Says to inject page fault into guest\n");
304 pte64_t * shadow_pt = NULL;
305 pte64_t * guest_pt = NULL;
307 // Get the next shadow page level, allocate if not present
309 if (shadow_pde_access == PT_ACCESS_NOT_PRESENT) {
310 struct shadow_page_data * shdw_page = create_new_shadow_pt(info);
311 shadow_pt = (pte64_t *)V3_VAddr((void *)shdw_page->page_pa);
313 PrintDebug("Creating new shadow PT: %p\n", shadow_pt);
315 shadow_pde->present = 1;
316 shadow_pde->user_page = guest_pde->user_page;
319 if (guest_pde->large_page == 0) {
320 shadow_pde->writable = guest_pde->writable;
322 // This large page flag is temporary until we can get a working cache....
323 ((pde64_2MB_t *)guest_pde)->vmm_info = V3_LARGE_PG;
325 if (error_code.write) {
326 shadow_pde->writable = guest_pde->writable;
327 ((pde64_2MB_t *)guest_pde)->dirty = 1;
329 shadow_pde->writable = 0;
330 ((pde64_2MB_t *)guest_pde)->dirty = 0;
334 // VMM Specific options
335 shadow_pde->write_through = 0;
336 shadow_pde->cache_disable = 0;
337 shadow_pde->global_page = 0;
340 guest_pde->accessed = 1;
342 shadow_pde->pt_base_addr = PAGE_BASE_ADDR(shdw_page->page_pa);
344 shadow_pt = (pte64_t *)V3_VAddr((void *)BASE_TO_PAGE_ADDR(shadow_pde->pt_base_addr));
347 // Continue processing at the next level
348 if (guest_pde->large_page == 0) {
349 if (guest_pa_to_host_va(info, BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr), (addr_t *)&guest_pt) == -1) {
350 // Machine check the guest
351 PrintDebug("Invalid Guest PTE Address: 0x%p\n", (void *)BASE_TO_PAGE_ADDR(guest_pde->pt_base_addr));
352 v3_raise_exception(info, MC_EXCEPTION);
356 if (handle_pte_shadow_pagefault_64(info, fault_addr, error_code, shadow_pt, guest_pt) == -1) {
357 PrintError("Error handling Page fault caused by PDE\n");
361 if (handle_2MB_shadow_pagefault_64(info, fault_addr, error_code, shadow_pt, (pde64_2MB_t *)guest_pde) == -1) {
362 PrintError("Error handling large pagefault\n");
371 static int handle_pte_shadow_pagefault_64(struct guest_info * info, addr_t fault_addr, pf_error_t error_code,
372 pte64_t * shadow_pt, pte64_t * guest_pt) {
373 pt_access_status_t guest_pte_access;
374 pt_access_status_t shadow_pte_access;
375 pte64_t * guest_pte = (pte64_t *)&(guest_pt[PTE64_INDEX(fault_addr)]);;
376 pte64_t * shadow_pte = (pte64_t *)&(shadow_pt[PTE64_INDEX(fault_addr)]);
377 addr_t guest_pa = BASE_TO_PAGE_ADDR((addr_t)(guest_pte->page_base_addr)) + PAGE_OFFSET(fault_addr);
378 // struct shadow_page_state * state = &(info->shdw_pg_state);
380 PrintDebug("Handling PTE fault\n");
382 struct v3_shadow_region * shdw_reg = v3_get_shadow_region(info, guest_pa);
386 if ((shdw_reg == NULL) ||
387 (shdw_reg->host_type == SHDW_REGION_INVALID)) {
388 // Inject a machine check in the guest
389 PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_pa);
390 v3_raise_exception(info, MC_EXCEPTION);
394 // Check the guest page permissions
395 guest_pte_access = v3_can_access_pte64(guest_pt, fault_addr, error_code);
397 // Check the shadow page permissions
398 shadow_pte_access = v3_can_access_pte64(shadow_pt, fault_addr, error_code);
400 /* Was the page fault caused by the Guest's page tables? */
401 if (is_guest_pf(guest_pte_access, shadow_pte_access) == 1) {
402 PrintDebug("Access error injecting pf to guest (guest access error=%d) (pf error code=%d)\n",
403 guest_pte_access, *(uint_t*)&error_code);
404 inject_guest_pf(info, fault_addr, error_code);
409 if (shadow_pte_access == PT_ACCESS_OK) {
410 // Inconsistent state...
411 // Guest Re-Entry will flush page tables and everything should now work
412 PrintDebug("Inconsistent state... Guest re-entry should flush tlb\n");
417 if (shadow_pte_access == PT_ACCESS_NOT_PRESENT) {
418 // Page Table Entry Not Present
419 PrintDebug("guest_pa =%p\n", (void *)guest_pa);
421 if ((shdw_reg->host_type == SHDW_REGION_ALLOCATED) ||
422 (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK)) {
423 addr_t shadow_pa = v3_get_shadow_addr(shdw_reg, guest_pa);
425 shadow_pte->page_base_addr = PAGE_BASE_ADDR(shadow_pa);
427 shadow_pte->present = guest_pte->present;
428 shadow_pte->user_page = guest_pte->user_page;
430 //set according to VMM policy
431 shadow_pte->write_through = 0;
432 shadow_pte->cache_disable = 0;
433 shadow_pte->global_page = 0;
436 guest_pte->accessed = 1;
438 if (guest_pte->dirty == 1) {
439 shadow_pte->writable = guest_pte->writable;
440 } else if ((guest_pte->dirty == 0) && (error_code.write == 1)) {
441 shadow_pte->writable = guest_pte->writable;
442 guest_pte->dirty = 1;
443 } else if ((guest_pte->dirty == 0) && (error_code.write == 0)) {
444 shadow_pte->writable = 0;
447 // dirty flag has been set, check if its in the cache
448 /* if (find_pte_map(state->cached_ptes, PAGE_ADDR(guest_pa)) != NULL) { */
449 /* if (error_code.write == 1) { */
450 /* state->cached_cr3 = 0; */
451 /* shadow_pte->writable = guest_pte->writable; */
453 /* shadow_pte->writable = 0; */
457 // Write hooks trump all, and are set Read Only
458 if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
459 shadow_pte->writable = 0;
463 // Page fault handled by hook functions
465 if (v3_handle_mem_full_hook(info, fault_addr, guest_pa, shdw_reg, error_code) == -1) {
466 PrintError("Special Page fault handler returned error for address: %p\n", (void *)fault_addr);
470 } else if (shadow_pte_access == PT_ACCESS_WRITE_ERROR) {
471 guest_pte->dirty = 1;
473 if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
474 if (v3_handle_mem_wr_hook(info, fault_addr, guest_pa, shdw_reg, error_code) == -1) {
475 PrintError("Special Page fault handler returned error for address: %p\n", (void *)fault_addr);
479 PrintDebug("Shadow PTE Write Error\n");
480 shadow_pte->writable = guest_pte->writable;
483 /* if (find_pte_map(state->cached_ptes, PAGE_ADDR(guest_pa)) != NULL) { */
484 /* struct shadow_page_state * state = &(info->shdw_pg_state); */
485 /* PrintDebug("Write operation on Guest PAge Table Page\n"); */
486 /* state->cached_cr3 = 0; */
492 // Inject page fault into the guest
493 inject_guest_pf(info, fault_addr, error_code);
494 PrintError("PTE Page fault fell through... Not sure if this should ever happen\n");
495 PrintError("Manual Says to inject page fault into guest\n");
504 static int handle_2MB_shadow_pagefault_64(struct guest_info * info,
505 addr_t fault_addr, pf_error_t error_code,
506 pte64_t * shadow_pt, pde64_2MB_t * large_guest_pde)
508 pt_access_status_t shadow_pte_access = v3_can_access_pte64(shadow_pt, fault_addr, error_code);
509 pte64_t * shadow_pte = (pte64_t *)&(shadow_pt[PTE64_INDEX(fault_addr)]);
510 addr_t guest_fault_pa = BASE_TO_PAGE_ADDR_2MB(large_guest_pde->page_base_addr) + PAGE_OFFSET_2MB(fault_addr);
511 // struct shadow_page_state * state = &(info->shdw_pg_state);
513 PrintDebug("Handling 2MB fault (guest_fault_pa=%p) (error_code=%x)\n", (void *)guest_fault_pa, *(uint_t*)&error_code);
514 PrintDebug("ShadowPT=%p, LargeGuestPDE=%p\n", shadow_pt, large_guest_pde);
516 struct v3_shadow_region * shdw_reg = v3_get_shadow_region(info, guest_fault_pa);
519 if ((shdw_reg == NULL) ||
520 (shdw_reg->host_type == SHDW_REGION_INVALID)) {
521 // Inject a machine check in the guest
522 PrintDebug("Invalid Guest Address in page table (0x%p)\n", (void *)guest_fault_pa);
523 v3_raise_exception(info, MC_EXCEPTION);
527 if (shadow_pte_access == PT_ACCESS_OK) {
528 // Inconsistent state...
529 // Guest Re-Entry will flush tables and everything should now workd
530 PrintDebug("Inconsistent state... Guest re-entry should flush tlb\n");
531 //PrintHostPageTree(info, fault_addr, info->ctrl_regs.cr3);
536 if (shadow_pte_access == PT_ACCESS_NOT_PRESENT) {
537 // Get the guest physical address of the fault
539 if ((shdw_reg->host_type == SHDW_REGION_ALLOCATED) ||
540 (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK)) {
541 addr_t shadow_pa = v3_get_shadow_addr(shdw_reg, guest_fault_pa);
543 PrintDebug("Shadow PA=%p, ShadowPTE=%p\n", (void *)shadow_pa, (void *)shadow_pte);
545 shadow_pte->page_base_addr = PAGE_BASE_ADDR(shadow_pa);
546 PrintDebug("Test1\n");
548 shadow_pte->present = 1;
550 /* We are assuming that the PDE entry has precedence
551 * so the Shadow PDE will mirror the guest PDE settings,
552 * and we don't have to worry about them here
555 shadow_pte->user_page = 1;
559 /* if (find_pte_map(state->cached_ptes, PAGE_ADDR(guest_fault_pa)) != NULL) { */
560 /* // Check if the entry is a page table... */
561 /* PrintDebug("Marking page as Guest Page Table (large page)\n"); */
562 /* shadow_pte->writable = 0; */
563 /* } else */ if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
564 shadow_pte->writable = 0;
566 shadow_pte->writable = 1;
569 //set according to VMM policy
570 shadow_pte->write_through = 0;
571 shadow_pte->cache_disable = 0;
572 shadow_pte->global_page = 0;
576 // Handle hooked pages as well as other special pages
577 // if (handle_special_page_fault(info, fault_addr, guest_fault_pa, error_code) == -1) {
579 if (v3_handle_mem_full_hook(info, fault_addr, guest_fault_pa, shdw_reg, error_code) == -1) {
580 PrintError("Special Page Fault handler returned error for address: %p\n", (void *)fault_addr);
584 } else if (shadow_pte_access == PT_ACCESS_WRITE_ERROR) {
586 if (shdw_reg->host_type == SHDW_REGION_WRITE_HOOK) {
588 if (v3_handle_mem_wr_hook(info, fault_addr, guest_fault_pa, shdw_reg, error_code) == -1) {
589 PrintError("Special Page Fault handler returned error for address: %p\n", (void *)fault_addr);
595 /* if (find_pte_map(state->cached_ptes, PAGE_ADDR(guest_fault_pa)) != NULL) { */
596 /* struct shadow_page_state * state = &(info->shdw_pg_state); */
597 /* PrintDebug("Write operation on Guest PAge Table Page (large page)\n"); */
598 /* state->cached_cr3 = 0; */
599 /* shadow_pte->writable = 1; */
603 PrintError("Error in large page fault handler...\n");
604 PrintError("This case should have been handled at the top level handler\n");
608 // PrintHostPageTree(info, fault_addr, info->ctrl_regs.cr3);
609 PrintDebug("Returning from large page fault handler\n");
616 static int invalidation_cb_64(struct guest_info * info, page_type_t type,
617 addr_t vaddr, addr_t page_ptr, addr_t page_pa,
618 void * private_data) {
623 pml4e64_t * pml = (pml4e64_t *)page_ptr;
625 if (pml[PML4E64_INDEX(vaddr)].present == 0) {
632 pdpe64_t * pdp = (pdpe64_t *)page_ptr;
633 pdpe64_t * pdpe = &(pdp[PDPE64_INDEX(vaddr)]);
635 if (pdpe->present == 0) {
639 if (pdpe->vmm_info == V3_LARGE_PG) {
640 PrintError("1 Gigabyte pages not supported\n");
651 pde64_t * pd = (pde64_t *)page_ptr;
652 pde64_t * pde = &(pd[PDE64_INDEX(vaddr)]);
654 if (pde->present == 0) {
658 if (pde->vmm_info == V3_LARGE_PG) {
667 pte64_t * pt = (pte64_t *)page_ptr;
669 pt[PTE64_INDEX(vaddr)].present = 0;
674 PrintError("Invalid Page Type\n");
679 // should not get here
680 PrintError("Should not get here....\n");
685 static inline int handle_shadow_invlpg_64(struct guest_info * info, addr_t vaddr) {
686 int ret = v3_drill_host_pt_64(info, info->ctrl_regs.cr3, vaddr, invalidation_cb_64, NULL);
688 PrintError("Page table drill returned error.... \n");
689 PrintHostPageTree(info, vaddr, info->ctrl_regs.cr3);
692 return (ret == -1) ? -1 : 0;