diff -ru usr/src/nv/nv-linux.h usr/src/nv.1361053/nv-linux.h
--- usr/src/nv/nv-linux.h	2005-03-22 16:19:09.000000000 +0100
+++ usr/src/nv.1361053/nv-linux.h	2005-10-11 19:01:57.647002680 +0200
@@ -1018,15 +1018,50 @@
 #define NV_CHANGE_PAGE_ATTR_BUG_PRESENT 1
 #endif
 
+#if defined(NVCPU_X86) || defined(NVCPU_X86_64)
+/*
+ * On Linux/x86-64 (and recent Linux/x86) kernels, the PAGE_KERNEL
+ * and PAGE_KERNEL_NOCACHE protection bit masks include _PAGE_NX
+ * to indicate that the no-execute protection page feature is used
+ * for the page in question.
+ *
+ * We need to be careful to mask out _PAGE_NX when the host system
+ * doesn't support this feature or when it's disabled: the kernel
+ * may not do this in its implementation of the  change_page_attr()
+ * interface.
+ */
+#ifndef X86_FEATURE_NX
+#define X86_FEATURE_NX (1*32+20)
+#endif
+#ifndef boot_cpu_has
+#define boot_cpu_has(x) test_bit(x, boot_cpu_data.x86_capability)
+#endif
+#ifndef MSR_EFER
+#define MSR_EFER 0xc0000080
+#endif
+#ifndef EFER_NX
+#define EFER_NX (1 << 11)
+#endif
+#ifndef _PAGE_NX
+#define _PAGE_NX ((NvU64)1 << 63)
+#endif
+extern NvU64 __nv_supported_pte_mask;
+#endif
+
 #if defined(NV_CHANGE_PAGE_ATTR_PRESENT) && !defined(NV_CHANGE_PAGE_ATTR_BUG_PRESENT)
 static inline void NV_SET_PAGE_ATTRIB_UNCACHED(nv_pte_t *page_ptr)
     {
         struct page *page = virt_to_page(__va(page_ptr->phys_addr));
-        change_page_attr(page, 1, PAGE_KERNEL_NOCACHE);
+        pgprot_t prot = PAGE_KERNEL_NOCACHE;
+#if defined(NVCPU_X86) || defined(NVCPU_X86_64)
+        pgprot_val(prot) &= __nv_supported_pte_mask;
+#endif
+        change_page_attr(page, 1, prot);
     }
 static inline void NV_SET_PAGE_ATTRIB_CACHED(nv_pte_t *page_ptr)
     {
         struct page *page = virt_to_page(__va(page_ptr->phys_addr));
+        pgprot_t prot = PAGE_KERNEL;
 #ifdef CONFIG_SWIOTLB
         if (page_ptr->orig_phys_addr)
         {
@@ -1034,7 +1069,10 @@
             os_dbg_breakpoint();
         }
 #endif
-        change_page_attr(page, 1, PAGE_KERNEL);
+#if defined(NVCPU_X86) || defined(NVCPU_X86_64)
+        pgprot_val(prot) &= __nv_supported_pte_mask;
+#endif
+        change_page_attr(page, 1, prot);
     }
 #else
 #define NV_SET_PAGE_ATTRIB_UNCACHED(page_list)
diff -ru usr/src/nv/nv.c usr/src/nv.1361053/nv.c
--- usr/src/nv/nv.c	2005-03-22 16:19:09.000000000 +0100
+++ usr/src/nv.1361053/nv.c	2005-10-11 18:59:20.347915776 +0200
@@ -38,6 +38,10 @@
 static int nv_disable_pat = 0;
 NV_MODULE_PARAMETER(nv_disable_pat);
 
+#if defined(NVCPU_X86) || defined(NVCPU_X86_64)
+NvU64 __nv_supported_pte_mask = ~_PAGE_NX;
+#endif
+
 /*
  * And one for the control device
  */
@@ -1024,6 +1028,16 @@
         __nv_enable_pat_support();
     }
 #endif
+
+#if defined(NVCPU_X86_64) || (defined(NVCPU_X86) && defined(CONFIG_X86_PAE))
+    if (boot_cpu_has(X86_FEATURE_NX))
+    {
+        U032 __eax, __edx;
+        rdmsr(MSR_EFER, __eax, __edx);
+        if ((__eax & EFER_NX) != 0)
+            __nv_supported_pte_mask |= _PAGE_NX;
+    }
+#endif
  
     return 0;