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 <[email protected]>

include/asm-x86/lguest_hcall.h

@@ -2,8 +2,6 @@
 #ifndef _X86_LGUEST_HCALL_H
 #define _X86_LGUEST_HCALL_H
 
-#include <asm/hw_irq.h>
-
 #define LHCALL_FLUSH_ASYNC	0
 #define LHCALL_LGUEST_INIT	1
 #define LHCALL_CRASH		2
@@ -36,6 +34,9 @@
  * definition of a gentleman: "someone who is only rude intentionally". */
 #define LGUEST_TRAP_ENTRY 0x1F
 
+#ifndef __ASSEMBLY__
+#include <asm/hw_irq.h>
+
 static inline unsigned long
 hcall(unsigned long call,
       unsigned long arg1, unsigned long arg2, unsigned long arg3)
@@ -66,4 +67,6 @@ struct hcall_args
 	/* These map directly onto eax, ebx, ecx, edx in struct lguest_regs */
 	unsigned long arg0, arg2, arg3, arg1;
 };
+
+#endif /* !__ASSEMBLY__ */
 #endif	/* _I386_LGUEST_HCALL_H */