Convert shadow paging to use 32 PAE (Direct Paging)

[palacios.git] / palacios / src / palacios / vmm_direct_paging_32.h

diff --git a/palacios/src/palacios/vmm_direct_paging_32.h b/palacios/src/palacios/vmm_direct_paging_32.h
index 52f0991..7b49d58 100644 (file)
--- a/palacios/src/palacios/vmm_direct_paging_32.h
+++ b/palacios/src/palacios/vmm_direct_paging_32.h
@@ -26,6 +26,7 @@
 #include <palacios/vmm.h>
 #include <palacios/vm_guest_mem.h>
 #include <palacios/vm_guest.h>
+#include <palacios/vmm_ctrl_regs.h>
 
 
 static inline int handle_passthrough_pagefault_32(struct guest_info * info, 
@@ -39,16 +40,14 @@ static inline int handle_passthrough_pagefault_32(struct guest_info * info,
     int pde_index = PDE32_INDEX(fault_addr);
     int pte_index = PTE32_INDEX(fault_addr);
     
-    struct v3_shadow_region * region = v3_get_shadow_region(info, fault_addr);
+    struct v3_mem_region * region = v3_get_mem_region(info->vm_info, info->vcpu_id, fault_addr);
 
     if (region == NULL) {
-       PrintError("Invalid region in passthrough page fault 32, addr=%p\n", 
+        PrintError(info->vm_info, info, "Invalid region in passthrough page fault 32, addr=%p\n", 
                   (void *)fault_addr);
        return -1;
     }
     
-    host_addr = v3_get_shadow_addr(region, fault_addr);
-    
     // Lookup the correct PDE address based on the PAGING MODE
     if (info->shdw_pg_mode == SHADOW_PAGING) {
        pde = CR3_TO_PDE32_VA(info->ctrl_regs.cr3);
@@ -59,7 +58,7 @@ static inline int handle_passthrough_pagefault_32(struct guest_info * info,
 
     // Fix up the PDE entry
     if (pde[pde_index].present == 0) {
-       pte = (pte32_t *)create_generic_pt_page();
+       pte = (pte32_t *)create_generic_pt_page(info);
        
        pde[pde_index].present = 1;
        pde[pde_index].writable = 1;
@@ -73,44 +72,43 @@ static inline int handle_passthrough_pagefault_32(struct guest_info * info,
     // Fix up the PTE entry
     if (pte[pte_index].present == 0) {
        
-       pte[pte_index].user_page = 1;
        
-       if (region->host_type == SHDW_REGION_ALLOCATED) {
-           // Full access
-           pte[pte_index].present = 1;
-           pte[pte_index].writable = 1;
-           
-           pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr);
-       } else if (region->host_type == SHDW_REGION_WRITE_HOOK) {
-           // Only trap writes
-           PrintDebug("Faulted in a write hook page\n");
+       if ((region->flags.alloced == 1) && 
+           (region->flags.read == 1)) {
+
+           pte[pte_index].user_page = 1;
+
            pte[pte_index].present = 1;
-           pte[pte_index].writable = 0;
+
+           if (region->flags.write == 1) {
+               pte[pte_index].writable = 1;
+           } else {
+               pte[pte_index].writable = 0;
+           }
+
+           if (v3_gpa_to_hpa(info, fault_addr, &host_addr) == -1) {
+               PrintError(info->vm_info, info, "Could not translate fault address (%p)\n", (void *)fault_addr);
+               return -1;
+           }
            
            pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr);
-       } else if (region->host_type == SHDW_REGION_FULL_HOOK) {
-           // trap all accesses
-           return v3_handle_mem_full_hook(info, fault_addr, fault_addr, region, error_code);
        } else {
-           PrintError("Unknown Region Type...\n");
-           return -1;
+           return region->unhandled(info, fault_addr, fault_addr, region, error_code);
        }
-    }
-    
-    if ( (region->host_type == SHDW_REGION_WRITE_HOOK) && 
-        (error_code.write == 1) ) {
-       PrintDebug("Triggering Direct paging Write hook\n");
-       return v3_handle_mem_wr_hook(info, fault_addr, fault_addr, region, error_code);
+    } else {
+       // We fix all permissions on the first pass, 
+       // so we only get here if its an unhandled exception
+       return region->unhandled(info, fault_addr, fault_addr, region, error_code);         
     }
 
-    
     return 0;
 }
 
 
 
 
-static inline int invalidate_addr_32(struct guest_info * info, addr_t inv_addr) {
+static inline int invalidate_addr_32_internal(struct guest_info * info, addr_t inv_addr,
+                                             addr_t *actual_start, uint64_t *actual_size) {
     pde32_t * pde = NULL;
     pte32_t * pte = NULL;
 
@@ -130,18 +128,56 @@ static inline int invalidate_addr_32(struct guest_info * info, addr_t inv_addr)
     }    
 
     if (pde[pde_index].present == 0) {
+        *actual_start = BASE_TO_PAGE_ADDR_4MB(PAGE_BASE_ADDR_4MB(inv_addr));
+        *actual_size = PAGE_SIZE_4MB;
        return 0;
     } else if (pde[pde_index].large_page) {
        pde[pde_index].present = 0;
+       pde[pde_index].writable = 0;
+       pde[pde_index].user_page = 0;
+        *actual_start = BASE_TO_PAGE_ADDR_4MB(PAGE_BASE_ADDR_4MB(inv_addr));
+        *actual_size = PAGE_SIZE_4MB;
        return 0;
     }
 
     pte = V3_VAddr((void*)BASE_TO_PAGE_ADDR(pde[pde_index].pt_base_addr));
 
     pte[pte_index].present = 0;
+    pte[pte_index].writable = 0;
+    pte[pte_index].user_page = 0;
+
+    *actual_start = BASE_TO_PAGE_ADDR_4KB(PAGE_BASE_ADDR_4KB(inv_addr));
+    *actual_size = PAGE_SIZE_4KB;
 
     return 0;
 }
 
 
+static inline int invalidate_addr_32(struct guest_info * core, addr_t inv_addr)
+{
+  addr_t start;
+  uint64_t len;
+  
+  return invalidate_addr_32_internal(core,inv_addr,&start,&len);
+}
+   
+static inline int invalidate_addr_32_range(struct guest_info * core, addr_t inv_addr_start, addr_t inv_addr_end)
+{
+  addr_t next;
+  addr_t start;
+  uint64_t len;
+  int rc;
+  
+  for (next=inv_addr_start; next<=inv_addr_end; ) {
+    rc = invalidate_addr_32_internal(core,next,&start, &len);
+    if (rc) { 
+      return rc;
+    }
+    next = start + len;
+  }
+  return 0;
+}
+
+
+
 #endif