On 11/17/2012 12:51 PM, Yinghai Lu wrote: > On Sat, Nov 17, 2012 at 12:41 PM, H. Peter Anvin <hpa at zytor.com> wrote: >> Sorry, with "real mode" are we talking about struct boot_params or the actual realmode trampoline? The latter needs to be < 640K as a hw requirement. > > boot_params. > > when kexec bzImage64, kexec will copy that from bzImage file, and > update it....and > pass pointer to arch/x86/boot/compressed/head_64.c via %rsi > Right, that's fine, of course. We should make sure there aren't any implicit 32-bit assumptions there... there really shouldn't need to be. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.
