added support for memory remapping

[palacios.git] / palacios / src / palacios / vmm_direct_paging_64.h

diff --git a/palacios/src/palacios/vmm_direct_paging_64.h b/palacios/src/palacios/vmm_direct_paging_64.h
index d79693b..1c819ee 100644 (file)
--- a/palacios/src/palacios/vmm_direct_paging_64.h
+++ b/palacios/src/palacios/vmm_direct_paging_64.h
@@ -28,6 +28,7 @@
 #include <palacios/vm_guest.h>
 
 
+
 static inline int handle_passthrough_pagefault_64(struct guest_info * info, 
                                                     addr_t fault_addr, 
                                                     pf_error_t error_code) {
@@ -43,16 +44,18 @@ static inline int handle_passthrough_pagefault_64(struct guest_info * info,
     int pte_index = PTE64_INDEX(fault_addr);
 
 
+    
+
     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 64, addr=%p\n", 
                   (void *)fault_addr);
        return -1;
     }
 
     host_addr = v3_get_shadow_addr(region, fault_addr);
+    //
 
     // Lookup the correct PML address based on the PAGING MODE
     if (info->shdw_pg_mode == SHADOW_PAGING) {
@@ -65,8 +68,11 @@ static inline int handle_passthrough_pagefault_64(struct guest_info * info,
     if (pml[pml_index].present == 0) {
        pdpe = (pdpe64_t *)create_generic_pt_page();
    
-       pml[pml_index].present = 1;
        // Set default PML Flags...
+       pml[pml_index].present = 1;
+        pml[pml_index].writable = 1;
+        pml[pml_index].user_page = 1;
+
        pml[pml_index].pdp_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pdpe));    
     } else {
        pdpe = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pml[pml_index].pdp_base_addr));
@@ -76,8 +82,11 @@ static inline int handle_passthrough_pagefault_64(struct guest_info * info,
     if (pdpe[pdpe_index].present == 0) {
        pde = (pde64_t *)create_generic_pt_page();
        
-       pdpe[pdpe_index].present = 1;
        // Set default PDPE Flags...
+       pdpe[pdpe_index].present = 1;
+       pdpe[pdpe_index].writable = 1;
+       pdpe[pdpe_index].user_page = 1;
+
        pdpe[pdpe_index].pd_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pde));    
     } else {
        pde = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pdpe[pdpe_index].pd_base_addr));
@@ -134,5 +143,59 @@ static inline int handle_passthrough_pagefault_64(struct guest_info * info,
     return 0;
 }
 
+static inline int invalidate_addr_64(struct guest_info * info, addr_t inv_addr) {
+    pml4e64_t * pml = NULL;
+    pdpe64_t * pdpe = NULL;
+    pde64_t * pde = NULL;
+    pte64_t * pte = NULL;
+
+
+    // TODO:
+    // Call INVLPGA
+
+    // clear the page table entry
+    int pml_index = PML4E64_INDEX(inv_addr);
+    int pdpe_index = PDPE64_INDEX(inv_addr);
+    int pde_index = PDE64_INDEX(inv_addr);
+    int pte_index = PTE64_INDEX(inv_addr);
+
+    
+    // Lookup the correct PDE address based on the PAGING MODE
+    if (info->shdw_pg_mode == SHADOW_PAGING) {
+       pml = CR3_TO_PML4E64_VA(info->ctrl_regs.cr3);
+    } else {
+       pml = CR3_TO_PML4E64_VA(info->direct_map_pt);
+    }
+
+    if (pml[pml_index].present == 0) {
+       return 0;
+    }
+
+    pdpe = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pml[pml_index].pdp_base_addr));
+
+    if (pdpe[pdpe_index].present == 0) {
+       return 0;
+    } else if (pdpe[pdpe_index].large_page == 1) {
+       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 == 1) {
+       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