1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
--- ../../linux-2.6.11/include/asm-ia64/uaccess.h 2005-03-02 00:37:53.000000000 -0700
+++ include/asm-ia64/uaccess.h 2005-06-21 21:53:20.000000000 -0600
@@ -32,6 +32,10 @@
* David Mosberger-Tang <davidm@hpl.hp.com>
*/
+#ifdef CONFIG_VTI
+#include <asm/vmx_uaccess.h>
+#else // CONFIG_VTI
+
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/sched.h>
@@ -60,6 +64,11 @@
* 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 +76,7 @@
&& ((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
@@ -343,6 +353,7 @@
__su_ret; \
})
+#endif // CONFIG_VTI
/* Generic code can't deal with the location-relative format that we use for compactness. */
#define ARCH_HAS_SORT_EXTABLE
#define ARCH_HAS_SEARCH_EXTABLE
|
