diff options
| author | Rusty Russell <rusty@rustcorp.com.au> | 2007-10-22 05:03:36 +0400 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2007-10-23 09:49:54 +0400 |
| commit | 47436aa4ad054c1c7c8231618e86ebd9305308dc (patch) | |
| tree | a9ba6e0521f9116442144a86e781a3164ec86094 /include | |
| parent | c18acd73ffc209def08003a1927473096f66c5ad (diff) | |
| download | linux-47436aa4ad054c1c7c8231618e86ebd9305308dc.tar.xz | |
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-x86/lguest_hcall.h | 7 | ||||
| -rw-r--r-- | include/linux/lguest.h | 5 |
2 files changed, 9 insertions, 3 deletions
diff --git a/include/asm-x86/lguest_hcall.h b/include/asm-x86/lguest_hcall.h index 8f2a1edc4fe2..0c553ef36240 100644 --- a/include/asm-x86/lguest_hcall.h +++ b/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 */ diff --git a/include/linux/lguest.h b/include/linux/lguest.h index 083052236db9..8beb29134626 100644 --- a/include/linux/lguest.h +++ b/include/linux/lguest.h @@ -44,11 +44,14 @@ struct lguest_data unsigned long reserve_mem; /* KHz for the TSC clock. */ u32 tsc_khz; + /* Page where the top-level pagetable is */ + unsigned long pgdir; /* Fields initialized by the Guest at boot: */ /* Instruction range to suppress interrupts even if enabled */ unsigned long noirq_start, noirq_end; - + /* Address above which page tables are all identical. */ + unsigned long kernel_address; /* The vector to try to use for system calls (0x40 or 0x80). */ unsigned int syscall_vec; }; |