* Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx> [100817 16:44]: > On Tue, Aug 17, 2010 at 01:53:12PM +0300, Tony Lindgren wrote: > > Here are some experimental patches to allow booting ARMv7 SMP > > kernel on UP to some extent. Posting these early in case it is > > of any help as I know at least Bryan Wu is working on similar > > issues. > > I think these are compeltely the wrong direction. First thing to realise > is that XIP in the "SMP and UP in one kernel" is not really practical - > I'm not sure that many people who want that kind of flexibility also want > XIP too. > > So let's forget about the kernel text being read-only. OK, at least for me. > The second thing to realise is that most of the SMP dependencies are in > assembly - and we can make lists of instructions and their modified > versions that would be necessary to boot a SMP kernel on UP. OK cool. > So something like this will do (though note that not everywhere has been > fixed up - such as the page table flags - or this patch tested yet.) Great, will give it a try hopefully tomorrow. Sounds like that's the way to deal with fixing up things when booting up older UP ARMv6 without the 32v6 support :) > If we don't want the SMP-on-UP support for SMP kernels (it's not actually > all that big - around 512 bytes) then we can discard the .smpalt.init > section and the __fixup_smp code. OK Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
