Re: [PATCH] x86, eboot: Support initrd loaded above 4G

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On Wed, 18 Jun, at 03:28:19PM, Matt Fleming wrote:
> On Sat, 14 Jun, at 12:23:41PM, Yinghai Lu wrote:
> > For boot efi kernel directly without bootloader.
> > If the kernel support XLF_CAN_BE_LOADED_ABOVE_4G, we should
> > not limit initrd under hdr->initrd_add_max.
> > 
> > Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
> > 
> > ---
> >  arch/x86/boot/compressed/eboot.c |   14 +++++++++++---
> >  1 file changed, 11 insertions(+), 3 deletions(-)
> 
> Applied, thanks!

Well, fooey. This patch breaks one of my ASUS machines. It appears some
firmware implementations exhibit issues reading directly into a buffer
above the 4GB mark.

I haven't diagnosed exactly what goes wrong with the buffer (i.e. in
what way it becomes corrupt), but I should really do that before
thinking of how to fix this.

I'll keep you posted, I just wanted to give you a heads up that things
are screwy in this area.

-- 
Matt Fleming, Intel Open Source Technology Center
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