From: Steven Jaconette <jacones@u.northwestern.edu>
Date: Fri, 6 Feb 2009 20:30:18 +0000 (-0600)
Subject: 32bit Write Hook Case for Direct Paging
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=commitdiff_plain;h=75aa9d6205930057dc8163238d325558bcb1fd9b;p=palacios-OLD.git

32bit Write Hook Case for Direct Paging
---

diff --git a/palacios/src/palacios/vmm_direct_paging.c b/palacios/src/palacios/vmm_direct_paging.c
index 55bf30d..c197c4c 100644
--- a/palacios/src/palacios/vmm_direct_paging.c
+++ b/palacios/src/palacios/vmm_direct_paging.c
@@ -12,9 +12,7 @@ pde32_t * v3_create_direct_passthrough_pts(struct guest_info * info) {
   v3_vm_cpu_mode_t mode = v3_get_cpu_mode(info);
   switch(mode) {
     case REAL:
-      //break;
     case PROTECTED:
-      PrintError("ABC\n");
       return v3_create_direct_passthrough_pts_32(info);
     case PROTECTED_PAE:
       break;
@@ -33,7 +31,6 @@ int v3_handle_shadow_pagefault_physical_mode(struct guest_info * info, addr_t fa
   v3_vm_cpu_mode_t mode = v3_get_cpu_mode(info);
   switch(mode) {
     case REAL:
-      // break;
     case PROTECTED:
       return v3_handle_shadow_pagefault_physical_mode_32(info, fault_addr, error_code);
     case PROTECTED_PAE:
diff --git a/palacios/src/palacios/vmm_direct_paging_32.h b/palacios/src/palacios/vmm_direct_paging_32.h
index 625abab..d075e74 100644
--- a/palacios/src/palacios/vmm_direct_paging_32.h
+++ b/palacios/src/palacios/vmm_direct_paging_32.h
@@ -40,6 +40,7 @@ static inline int v3_handle_shadow_pagefault_physical_mode_32(struct guest_info
     pte32_t * pte = create_pte32();
     addr_t host_addr;
     if(guest_pa_to_host_pa(info, fault_addr, &host_addr) == -1) return -1;
+    struct v3_shadow_region * region =  v3_get_shadow_region(info, PAGE_BASE_ADDR(host_addr));
       pte[pte_index].present = 1;
       pte[pte_index].writable = 1;
       pte[pte_index].user_page = 1;
@@ -49,6 +50,9 @@ static inline int v3_handle_shadow_pagefault_physical_mode_32(struct guest_info
       pde[pde_index].writable = 1;
       pde[pde_index].user_page = 1;
       pde[pde_index].pt_base_addr = PAGE_BASE_ADDR((addr_t)V3_PAddr(pte));
+      if(region->host_type == SHDW_REGION_WRITE_HOOK) {
+	pte[pte_index].writable = 0;
+      }
       PrintError("Fault Addr: 0x%p\nHost Addr: 0x%p\n", (void*)fault_addr, (void*)host_addr);
     }
     else {
@@ -56,10 +60,14 @@ static inline int v3_handle_shadow_pagefault_physical_mode_32(struct guest_info
       if(pte[pte_index].present != 1) {
 	addr_t host_addr;
 	if(guest_pa_to_host_pa(info, fault_addr, &host_addr) == -1) return -1;
+	struct v3_shadow_region * region =  v3_get_shadow_region(info, PAGE_BASE_ADDR(host_addr));
 	pte[pte_index].present = 1;
 	pte[pte_index].writable = 1;
 	pte[pte_index].user_page = 1;
 	pte[pte_index].page_base_addr = PAGE_BASE_ADDR(host_addr);
+	if(region->host_type == SHDW_REGION_WRITE_HOOK) {
+	  pte[pte_index].writable = 0;
+	}
       }
     }
     return 0;