tree a9ba6e0521f9116442144a86e781a3164ec86094
parent c18acd73ffc209def08003a1927473096f66c5ad
author Rusty Russell <rusty@rustcorp.com.au> 1193015016 +1000
committer Rusty Russell <rusty@rustcorp.com.au> 1193118594 +1000

Boot with virtual == physical to get closer to native Linux.

1) This allows us to get alot closer to booting bzImages.

2) It means we don't have to know page_offset.

3) The Guest needs to modify the boot pagetables to create the
   PAGE_OFFSET mapping before jumping to C code.

4) guest_pa() walks the page tables rather than using page_offset.

5) We don't use page_offset to figure out whether to emulate: it was
   always kinda quesationable, and won't work for instructions done
   before remapping (bzImage unpacking in particular).

6) We still want the kernel address for tlb flushing: have the initial
   hypercall give us that, too.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>