diff options
Diffstat (limited to 'xen/arch/x86/boot/trampoline.S')
| -rw-r--r-- | xen/arch/x86/boot/trampoline.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/xen/arch/x86/boot/trampoline.S b/xen/arch/x86/boot/trampoline.S index 2c92dc6a00..143612c91f 100644 --- a/xen/arch/x86/boot/trampoline.S +++ b/xen/arch/x86/boot/trampoline.S @@ -155,6 +155,13 @@ trampoline_boot_cpu_entry: lidt bootsym(rm_idt) sti +#if defined(__x86_64__) + /* Declare that our target operating mode is long mode. */ + movw $0xec00,%ax # declare target operating mode + movw $0x0002,%bx # long mode + int $0x15 +#endif + /* * Do real-mode work: * 1. Get memory map. |