xnu-3247.1.106.tar.gz

[apple/xnu.git] / osfmk / i386 / pmap_common.c

diff --git a/osfmk/i386/pmap_common.c b/osfmk/i386/pmap_common.c
index 4bf41195e1cccb8a6cc76d8f4c8ee2c07d931b1c..6fe3641c392b76d25619ebe018660cd4c700d9dd 100644 (file)
--- a/osfmk/i386/pmap_common.c
+++ b/osfmk/i386/pmap_common.c
@@ -62,7 +62,7 @@ event_t       mapping_replenish_event, pmap_user_pv_throttle_event;
 uint64_t pmap_pv_throttle_stat, pmap_pv_throttled_waiters;
 
 unsigned int pmap_cache_attributes(ppnum_t pn) {
-       if (pmap_get_cache_attributes(pn) & INTEL_PTE_NCACHE)
+       if (pmap_get_cache_attributes(pn, FALSE) & INTEL_PTE_NCACHE)
                return (VM_WIMG_IO);
        else
                return (VM_WIMG_COPYBACK);
@@ -108,28 +108,57 @@ void      pmap_set_cache_attributes(ppnum_t pn, unsigned int cacheattr) {
        }
 }
 
-unsigned       pmap_get_cache_attributes(ppnum_t pn) {
+unsigned       pmap_get_cache_attributes(ppnum_t pn, boolean_t is_ept) {
        if (last_managed_page == 0)
                return 0;
 
-       if (!IS_MANAGED_PAGE(ppn_to_pai(pn))) {
-           return INTEL_PTE_NCACHE;
-       }
+       if (!IS_MANAGED_PAGE(ppn_to_pai(pn)))
+           return PTE_NCACHE(is_ept);
 
        /*
         * The cache attributes are read locklessly for efficiency.
         */
        unsigned int attr = pmap_phys_attributes[ppn_to_pai(pn)];
        unsigned int template = 0;
-       
-       if (attr & PHYS_PTA)
+
+       /*
+        * The PTA bit is currently unsupported for EPT PTEs.
+        */
+       if ((attr & PHYS_PTA) && !is_ept)
                template |= INTEL_PTE_PTA;
+
+       /*
+        * If the page isn't marked as NCACHE, the default for EPT entries
+        * is WB.
+        */
        if (attr & PHYS_NCACHE)
-               template |= INTEL_PTE_NCACHE;
+               template |= PTE_NCACHE(is_ept);
+       else if (is_ept)
+               template |= INTEL_EPT_WB;
+
        return template;
 }
 
-
+boolean_t 
+pmap_has_managed_page(ppnum_t first, ppnum_t last)
+{
+       ppnum_t   pn;
+    boolean_t result;
+
+    assert(last_managed_page);
+    assert(first <= last);
+
+    for (result = FALSE, pn = first; 
+       !result 
+         && (pn <= last)
+         && (pn <= last_managed_page); 
+        pn++)
+    {
+       result = (0 != (pmap_phys_attributes[pn] & PHYS_MANAGED));
+    }
+
+       return (result);
+}
 
 boolean_t
 pmap_is_noencrypt(ppnum_t pn)
@@ -194,6 +223,35 @@ compute_pmap_gc_throttle(void *arg __unused)
 }
 
 
+void
+pmap_lock_phys_page(ppnum_t pn)
+{
+       int             pai;
+
+       pai = ppn_to_pai(pn);
+
+       if (IS_MANAGED_PAGE(pai)) {
+               LOCK_PVH(pai);
+       } else
+               simple_lock(&phys_backup_lock);
+}
+
+
+void
+pmap_unlock_phys_page(ppnum_t pn)
+{
+       int             pai;
+
+       pai = ppn_to_pai(pn);
+
+       if (IS_MANAGED_PAGE(pai)) {
+               UNLOCK_PVH(pai);
+       } else
+               simple_unlock(&phys_backup_lock);
+}
+
+
+
 __private_extern__ void
 pmap_pagetable_corruption_msg_log(int (*log_func)(const char * fmt, ...)__printflike(1,2)) {
        if (pmap_pagetable_corruption_incidents > 0) {