4 #define GDT_ENTRY_LGUEST_CS 10
5 #define GDT_ENTRY_LGUEST_DS 11
6 #define LGUEST_CS (GDT_ENTRY_LGUEST_CS * 8)
7 #define LGUEST_DS (GDT_ENTRY_LGUEST_DS * 8)
14 /* Every guest maps the core switcher code. */
15 #define SHARED_SWITCHER_PAGES \
16 DIV_ROUND_UP(end_switcher_text - start_switcher_text, PAGE_SIZE)
17 /* Pages for switcher itself, then two pages per cpu */
18 #define TOTAL_SWITCHER_PAGES (SHARED_SWITCHER_PAGES + 2 * NR_CPUS)
20 /* We map at -4M for ease of mapping into the guest (one PTE page). */
21 #define SWITCHER_ADDR 0xFFC00000
23 /* Found in switcher.S */
24 extern unsigned long default_idt_entries[];
28 /* Manually saved part. */
29 unsigned long ebx, ecx, edx;
30 unsigned long esi, edi, ebp;
33 unsigned long fs, ds, es;
34 unsigned long trapnum, errcode;
35 /* Trap pushed part */
43 /* This is a guest-specific page (mapped ro) into the guest. */
44 struct lguest_ro_state
46 /* Host information we need to restore when we switch back. */
48 struct Xgt_desc_struct host_idt_desc;
49 struct Xgt_desc_struct host_gdt_desc;
52 /* Fields which are used when guest is running. */
53 struct Xgt_desc_struct guest_idt_desc;
54 struct Xgt_desc_struct guest_gdt_desc;
55 struct i386_hw_tss guest_tss;
56 struct desc_struct guest_idt[IDT_ENTRIES];
57 struct desc_struct guest_gdt[GDT_ENTRIES];
62 /* The GDT entries copied into lguest_ro_state when running. */
63 struct desc_struct gdt[GDT_ENTRIES];
65 /* The IDT entries: some copied into lguest_ro_state when running. */
66 struct desc_struct idt[IDT_ENTRIES];
68 /* The address of the last guest-visible pagefault (ie. cr2). */
69 unsigned long last_pagefault;
72 static inline void lguest_set_ts(void)
81 /* Full 4G segment descriptors, suitable for CS and DS. */
82 #define FULL_EXEC_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9b00})
83 #define FULL_SEGMENT ((struct desc_struct){0x0000ffff, 0x00cf9300})
85 #endif /* __ASSEMBLY__ */