Re: [PATCH v2 1/3] x86, boot: add mmio serial during compressed boot

On Tue, Jul 16, 2013 at 12:41 PM, H. Peter Anvin [off-list ref] wrote:

On 07/16/2013 12:40 PM, Kees Cook wrote:

quoted

quoted

I think setting up a dynamic #PF handler is the right thing for the
decompressor, we already did for the kernel proper.

I'm not sure how to accomplish this yet. I'm still trying to
understand how the page tables are arranged. :)

Look at the handler at the top of arch/x86/kernel/head64.c.

could extract code from arch/x86/kernel/{head64.c, head_64.S},
and share them with arch/x86/boot/compressed/{misc.c, head_64.S}

Yinghai