diff options
Diffstat (limited to 'xen/arch/ia64/patch/linux-2.6.11/uaccess.h')
| -rw-r--r-- | xen/arch/ia64/patch/linux-2.6.11/uaccess.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/xen/arch/ia64/patch/linux-2.6.11/uaccess.h b/xen/arch/ia64/patch/linux-2.6.11/uaccess.h new file mode 100644 index 0000000000..def5aaac47 --- /dev/null +++ b/xen/arch/ia64/patch/linux-2.6.11/uaccess.h @@ -0,0 +1,22 @@ +--- ../../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 |