From 625efab1cd3d4da4634dfe26df6b4005385397e2 Mon Sep 17 00:00:00 2001 From: Jes Sorensen Date: Mon, 22 Oct 2007 11:03:28 +1000 Subject: Move i386 part of core.c to x86/core.c. Separate i386 architecture specific from core.c and move it to x86/core.c and add x86/lguest.h header file to match. Signed-off-by: Jes Sorensen Signed-off-by: Rusty Russell --- include/asm-x86/lguest.h | 87 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 include/asm-x86/lguest.h (limited to 'include/asm-x86') diff --git a/include/asm-x86/lguest.h b/include/asm-x86/lguest.h new file mode 100644 index 00000000000..f10f1c6cc3d --- /dev/null +++ b/include/asm-x86/lguest.h @@ -0,0 +1,87 @@ +#ifndef _X86_LGUEST_H +#define _X86_LGUEST_H + +#define GDT_ENTRY_LGUEST_CS 10 +#define GDT_ENTRY_LGUEST_DS 11 +#define LGUEST_CS (GDT_ENTRY_LGUEST_CS * 8) +#define LGUEST_DS (GDT_ENTRY_LGUEST_DS * 8) + +#ifndef __ASSEMBLY__ +#include + +#define GUEST_PL 1 + +/* Every guest maps the core switcher code. */ +#define SHARED_SWITCHER_PAGES \ + DIV_ROUND_UP(end_switcher_text - start_switcher_text, PAGE_SIZE) +/* Pages for switcher itself, then two pages per cpu */ +#define TOTAL_SWITCHER_PAGES (SHARED_SWITCHER_PAGES + 2 * NR_CPUS) + +/* We map at -4M for ease of mapping into the guest (one PTE page). */ +#define SWITCHER_ADDR 0xFFC00000 + +/* Found in switcher.S */ +extern unsigned long default_idt_entries[]; + +struct lguest_regs +{ + /* Manually saved part. */ + unsigned long ebx, ecx, edx; + unsigned long esi, edi, ebp; + unsigned long gs; + unsigned long eax; + unsigned long fs, ds, es; + unsigned long trapnum, errcode; + /* Trap pushed part */ + unsigned long eip; + unsigned long cs; + unsigned long eflags; + unsigned long esp; + unsigned long ss; +}; + +/* This is a guest-specific page (mapped ro) into the guest. */ +struct lguest_ro_state +{ + /* Host information we need to restore when we switch back. */ + u32 host_cr3; + struct Xgt_desc_struct host_idt_desc; + struct Xgt_desc_struct host_gdt_desc; + u32 host_sp; + + /* Fields which are used when guest is running. */ + struct Xgt_desc_struct guest_idt_desc; + struct Xgt_desc_struct guest_gdt_desc; + struct i386_hw_tss guest_tss; + struct desc_struct guest_idt[IDT_ENTRIES]; + struct desc_struct guest_gdt[GDT_ENTRIES]; +}; + +struct lguest_arch +{ + /* The GDT entries copied into lguest_ro_state when running. */ + struct desc_struct gdt[GDT_ENTRIES]; + + /* The IDT entries: some copied into lguest_ro_state when running. */ + struct desc_struct idt[IDT_ENTRIES]; + + /* The address of the last guest-visible pagefault (ie. cr2). */ + unsigned long last_pagefault; +}; + +static inline void lguest_set_ts(void) +{ + u32 cr0; + + cr0 = read_cr0(); + if (!(cr0 & 8)) + write_cr0(cr0|8); +} + +/* Full 4G segment descriptors, suitable for CS and DS. */ +#define FULL_EXEC_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9b00}) +#define FULL_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9300}) + +#endif /* __ASSEMBLY__ */ + +#endif -- cgit v1.2.3