diff options
Diffstat (limited to 'include/asm-x86/page_64.h')
| -rw-r--r-- | include/asm-x86/page_64.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/asm-x86/page_64.h b/include/asm-x86/page_64.h index cac5b9e78265..010d12db80dc 100644 --- a/include/asm-x86/page_64.h +++ b/include/asm-x86/page_64.h @@ -26,7 +26,13 @@ #define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT) #define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1)) -#define __PAGE_OFFSET _AC(0xffff810000000000, UL) +/* + * Set __PAGE_OFFSET to the most negative possible address + + * PGDIR_SIZE*16 (pgd slot 272). The gap is to allow a space for a + * hypervisor to fit. Choosing 16 slots here is arbitrary, but it's + * what Xen requires. + */ +#define __PAGE_OFFSET _AC(0xffff880000000000, UL) #define __PHYSICAL_START CONFIG_PHYSICAL_START #define __KERNEL_ALIGN 0x200000 |