diff options
Diffstat (limited to 'arch/x86_64/kernel/head.S')
| -rw-r--r-- | arch/x86_64/kernel/head.S | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S index 1e6f80870679..598a4d0351fc 100644 --- a/arch/x86_64/kernel/head.S +++ b/arch/x86_64/kernel/head.S @@ -163,6 +163,20 @@ startup_64: */ lgdt cpu_gdt_descr + /* set up data segments. actually 0 would do too */ + movl $__KERNEL_DS,%eax + movl %eax,%ds + movl %eax,%ss + movl %eax,%es + + /* + * We don't really need to load %fs or %gs, but load them anyway + * to kill any stale realmode selectors. This allows execution + * under VT hardware. + */ + movl %eax,%fs + movl %eax,%gs + /* * Setup up a dummy PDA. this is just for some early bootup code * that does in_interrupt() @@ -173,12 +187,6 @@ startup_64: shrq $32,%rdx wrmsr - /* set up data segments. actually 0 would do too */ - movl $__KERNEL_DS,%eax - movl %eax,%ds - movl %eax,%ss - movl %eax,%es - /* esi is pointer to real mode structure with interesting info. pass it to C */ movl %esi, %edi |