On Fri, Oct 12, 2012 at 09:09:43AM -0700, Fenghua Yu wrote: > From: Fenghua Yu <fenghua...@intel.com> > > start_cpu0() is defined in head_64.S for 64-bit. The function sets up stack > and > jumps to start_secondary() for CPU0 wake up. > > Signed-off-by: Fenghua Yu <fenghua...@intel.com> > --- > arch/x86/kernel/head_64.S | 15 +++++++++++++++ > 1 files changed, 15 insertions(+), 0 deletions(-) > > diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S > index 94bf9cc..3faac8a 100644 > --- a/arch/x86/kernel/head_64.S > +++ b/arch/x86/kernel/head_64.S > @@ -252,6 +252,21 @@ ENTRY(secondary_startup_64) > pushq %rax # target address in negative space > lretq > > +#ifdef CONFIG_HOTPLUG_CPU > +/* > + * Boot CPU0 entry point. It's called from play_dead(). Everything has been > set > + * up already except stack. We just set up stack here. Then call > + * start_secondary(). > + */ > +ENTRY(start_cpu0) > + movq stack_start(%rip),%rsp > + movq initial_code(%rip),%rax > + pushq $0 # fake return address to stop unwinder > + pushq $__KERNEL_CS # set correct cs > + pushq %rax # target address in negative space > + lretq
ENDPROC(start_cpu0) maybe? Ditto for head_32.S in the next patch. Thanks. -- Regards/Gruss, Boris. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
