X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_shadow_paging_32.h;h=03e1f7ac0e2a6061694803e5e8e3408a87cd0305;hp=4614232fcf17fd0bc452b7639b8ee09fea510a98;hb=316c417125ed34aaa60f9fc5486a6d8dec4fb361;hpb=7c9087090f06a3fdf041f650912c36b6b12d7a82

diff --git a/palacios/src/palacios/vmm_shadow_paging_32.h b/palacios/src/palacios/vmm_shadow_paging_32.h
index 4614232..03e1f7a 100644
--- a/palacios/src/palacios/vmm_shadow_paging_32.h
+++ b/palacios/src/palacios/vmm_shadow_paging_32.h
@@ -33,6 +33,10 @@ static inline int activate_shadow_pt_32(struct guest_info * info) {
     shadow_cr3->pwt = guest_cr3->pwt;
     shadow_cr3->pcd = guest_cr3->pcd;
   
+#ifdef CONFIG_SYMBIOTIC_SWAP
+    v3_swap_flush(info);
+#endif
+
     return 0;
 }
 
@@ -225,12 +229,39 @@ static int handle_pte_shadow_pagefault_32(struct guest_info * info, addr_t fault
 	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)) {
+	if ((error_code.write == 0) && (is_swapped_pte32(guest_pte))) {
 	    PrintError("Page fault on swapped out page (pte=%x)\n", *(uint32_t *)guest_pte);
 
-	    if (inject_guest_pf(info, fault_addr, error_code) == -1) {
-		PrintError("Could not inject guest page fault\n");
-		return -1;
+ 	    addr_t swp_pg_addr = v3_get_swapped_pg_addr(info, shadow_pte, guest_pte);
+
+	    if (swp_pg_addr == 0) {
+		if (inject_guest_pf(info, fault_addr, error_code) == -1) {
+		    PrintError("Could not inject guest page fault\n");
+		    return -1;
+		}
+	    } else {
+		/* 
+		 *  Setup shadow paging state
+		 */
+		
+		/* We need some way to check permissions.... */
+		
+		shadow_pte->accessed = 1;
+		shadow_pte->writable = 0;
+
+		if (fault_addr & 0xc0000000) {
+		    shadow_pte->user_page = 0;
+		} else {
+		    shadow_pte->user_page = 1;
+		}
+
+		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_addr;
 	    }
 	} else {
 	    if (inject_guest_pf(info, fault_addr, error_code) == -1) {