static inline int handle_passthrough_pagefault_32pae(struct guest_info * info,
addr_t fault_addr,
pf_error_t error_code) {
- pdpe32pae_t * pdpe = CR3_TO_PDPE32PAE_VA(info->ctrl_regs.cr3);
+ pdpe32pae_t * pdpe = NULL;
pde32pae_t * pde = NULL;
pte32pae_t * pte = NULL;
addr_t host_addr = 0;
struct v3_shadow_region * region = v3_get_shadow_region(info, fault_addr);
- if ((region == NULL) ||
- (region->host_type == SHDW_REGION_INVALID)) {
+ if (region == NULL) {
PrintError("Invalid region in passthrough page fault 32PAE, addr=%p\n",
(void *)fault_addr);
return -1;
host_addr = v3_get_shadow_addr(region, fault_addr);
+ // Lookup the correct PDPE address based on the PAGING MODE
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
+ pdpe = CR3_TO_PDPE32PAE_VA(info->ctrl_regs.cr3);
+ } else {
+ pdpe = CR3_TO_PDPE32PAE_VA(info->direct_map_pt);
+ }
+
// Fix up the PDPE entry
if (pdpe[pdpe_index].present == 0) {
pde = (pde32pae_t *)create_generic_pt_page();
}
+static inline int invalidate_addr_32pae(struct guest_info * info, addr_t inv_addr) {
+ pdpe32pae_t * pdpe = NULL;
+ pde32pae_t * pde = NULL;
+ pte32pae_t * pte = NULL;
+
+
+ // TODO:
+ // Call INVLPGA
+
+ // clear the page table entry
+ int pdpe_index = PDPE32PAE_INDEX(inv_addr);
+ int pde_index = PDE32PAE_INDEX(inv_addr);
+ int pte_index = PTE32PAE_INDEX(inv_addr);
+
+
+ // Lookup the correct PDE address based on the PAGING MODE
+ if (info->shdw_pg_mode == SHADOW_PAGING) {
+ pdpe = CR3_TO_PDPE32PAE_VA(info->ctrl_regs.cr3);
+ } else {
+ pdpe = CR3_TO_PDPE32PAE_VA(info->direct_map_pt);
+ }
+
+
+ if (pdpe[pdpe_index].present == 0) {
+ return 0;
+ }
+
+ pde = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pdpe[pdpe_index].pd_base_addr));
+
+ if (pde[pde_index].present == 0) {
+ return 0;
+ } else if (pde[pde_index].large_page) {
+ pde[pde_index].present = 0;
+ return 0;
+ }
+
+ pte = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pde[pde_index].pt_base_addr));
+
+ pte[pte_index].present = 0;
+
+ return 0;
+}
+
+
+
#endif