shadow_cr3->pwt = guest_cr3->pwt;
shadow_cr3->pcd = guest_cr3->pcd;
-
-#ifdef CONFIG_SYMBIOTIC_SWAP
- v3_swap_flush(core->vm_info);
-#endif
return 0;
}
PrintDebug("Access error injecting pf to guest (guest access error=%d) (pf error code=%d)\n",
guest_pte_access, *(uint_t*)&error_code);
-#ifdef CONFIG_SYMBIOTIC_SWAP
- if (is_swapped_pte32(guest_pte)) {
-
- pf_error_t swap_perms;
-
-
- /*
- int sym_ret = v3_get_vaddr_perms(info, fault_addr, guest_pte, &swap_perms);
- sym_ret = 0;
- */
- addr_t swp_pg_addr = 0;
-
-
-#ifdef CONFIG_SYMBIOTIC_SWAP_TELEMETRY
- if (error_code.write == 0) {
- info->vm_info->swap_state.read_faults++;
- } else {
- info->vm_info->swap_state.write_faults++;
- }
-#endif
-
-
- swp_pg_addr = v3_get_swapped_pg_addr(info->vm_info, guest_pte);
-
- if (swp_pg_addr != 0) {
- PrintDebug("Swapped page address=%p\n", (void *)swp_pg_addr);
-
- /*
- if (info->cpl == 0) {
- PrintError("Swapped Page fault in kernel mode.... bad...\n");
- goto inject;
- }
- */
-
- int sym_ret = v3_get_vaddr_perms(info, fault_addr, guest_pte, &swap_perms);
-
- if (sym_ret == -1) {
- PrintError("Symcall error...\n");
- return -1;
- } else if (sym_ret == 0) {
-
-
- if (swap_perms.present == 0) {
- PrintError("Nonpresent swapped page\n");
- }
-
- // swap_perms.write ==1 || error_code.write == 0
- // swap_perms.user == 0 || error_code.user == 1
-
- // This checks for permissions violations that require a guest PF injection
- if ( (swap_perms.present == 1) &&
- ( (swap_perms.write == 1) ||
- (error_code.write == 0) ) &&
- ( (swap_perms.user == 1) ||
- (error_code.user == 0) ) ) {
- addr_t swp_pg_pa = 0;
-
- swp_pg_pa = v3_map_swp_page(info->vm_info, shadow_pte, guest_pte, (void *)swp_pg_addr);
-
- PrintDebug("Page fault on swapped out page (vaddr=%p) (pte=%x) (error_code=%x)\n",
- (void *)fault_addr, *(uint32_t *)guest_pte, *(uint32_t *)&error_code);
-
- shadow_pte->writable = swap_perms.write;
- shadow_pte->user_page = swap_perms.user;
-
- shadow_pte->write_through = 0;
- shadow_pte->cache_disable = 0;
- shadow_pte->global_page = 0;
-
- shadow_pte->present = 1;
-
- shadow_pte->page_base_addr = swp_pg_pa;
-
-#ifdef CONFIG_SYMBIOTIC_SWAP_TELEMETRY
- info->vm_info->swap_state.mapped_pages++;
-#endif
- // PrintError("Swap fault handled\n");
- return 0;
- }
- }
- } else {
- PrintDebug("Not a sym swappable page\n");
- }
-
- }
-#endif
// inject:
-
if (v3_inject_guest_pf(info, fault_addr, error_code) == -1) {
PrintError("Could not inject guest page fault for vaddr %p\n", (void *)fault_addr);
return -1;