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--- ../../linux-2.6.11/include/asm-ia64/uaccess.h 2005-06-06 10:36:23.000000000 -0600
+++ include/asm-ia64/uaccess.h 2005-06-10 18:08:06.000000000 -0600
@@ -60,6 +60,11 @@
* address TASK_SIZE is never valid. We also need to make sure that the address doesn't
* point inside the virtually mapped linear page table.
*/
+#ifdef XEN
+/* VT-i reserves bit 60 for the VMM; guest addresses have bit 60 = bit 59 */
+#define IS_VMM_ADDRESS(addr) ((((addr) >> 60) ^ ((addr) >> 59)) & 1)
+#define __access_ok(addr, size, segment) (!IS_VMM_ADDRESS((unsigned long)(addr)))
+#else
#define __access_ok(addr, size, segment) \
({ \
__chk_user_ptr(addr); \
@@ -67,6 +72,7 @@
&& ((segment).seg == KERNEL_DS.seg \
|| likely(REGION_OFFSET((unsigned long) (addr)) < RGN_MAP_LIMIT))); \
})
+#endif
#define access_ok(type, addr, size) __access_ok((addr), (size), get_fs())
static inline int
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