1 #ifndef _ASM_X86_LGUEST_H
2 #define _ASM_X86_LGUEST_H
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 /* Page for Switcher text itself, then two pages per cpu */
15 #define TOTAL_SWITCHER_PAGES (1 + 2 * nr_cpu_ids)
17 /* Where we map the Switcher, in both Host and Guest. */
18 extern unsigned long switcher_addr;
20 /* Found in switcher.S */
21 extern unsigned long default_idt_entries[];
23 /* Declarations for definitions in lguest_guest.S */
24 extern char lguest_noirq_start[], lguest_noirq_end[];
25 extern const char lgstart_cli[], lgend_cli[];
26 extern const char lgstart_sti[], lgend_sti[];
27 extern const char lgstart_popf[], lgend_popf[];
28 extern const char lgstart_pushf[], lgend_pushf[];
29 extern const char lgstart_iret[], lgend_iret[];
31 extern void lguest_iret(void);
32 extern void lguest_init(void);
35 /* Manually saved part. */
36 unsigned long eax, ebx, ecx, edx;
37 unsigned long esi, edi, ebp;
39 unsigned long fs, ds, es;
40 unsigned long trapnum, errcode;
41 /* Trap pushed part */
49 /* This is a guest-specific page (mapped ro) into the guest. */
50 struct lguest_ro_state {
51 /* Host information we need to restore when we switch back. */
53 struct desc_ptr host_idt_desc;
54 struct desc_ptr host_gdt_desc;
57 /* Fields which are used when guest is running. */
58 struct desc_ptr guest_idt_desc;
59 struct desc_ptr guest_gdt_desc;
60 struct x86_hw_tss guest_tss;
61 struct desc_struct guest_idt[IDT_ENTRIES];
62 struct desc_struct guest_gdt[GDT_ENTRIES];
66 /* The GDT entries copied into lguest_ro_state when running. */
67 struct desc_struct gdt[GDT_ENTRIES];
69 /* The IDT entries: some copied into lguest_ro_state when running. */
70 struct desc_struct idt[IDT_ENTRIES];
72 /* The address of the last guest-visible pagefault (ie. cr2). */
73 unsigned long last_pagefault;
76 static inline void lguest_set_ts(void)
85 /* Full 4G segment descriptors, suitable for CS and DS. */
86 #define FULL_EXEC_SEGMENT \
87 ((struct desc_struct)GDT_ENTRY_INIT(0xc09b, 0, 0xfffff))
88 #define FULL_SEGMENT ((struct desc_struct)GDT_ENTRY_INIT(0xc093, 0, 0xfffff))
90 #endif /* __ASSEMBLY__ */
92 #endif /* _ASM_X86_LGUEST_H */