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 /* 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_cpu_ids)
20 /* We map at -4M (-2M when PAE is activated) for ease of mapping
21 * into the guest (one PTE page). */
23 #define SWITCHER_ADDR 0xFFE00000
25 #define SWITCHER_ADDR 0xFFC00000
28 /* Found in switcher.S */
29 extern unsigned long default_idt_entries[];
31 /* Declarations for definitions in lguest_guest.S */
32 extern char lguest_noirq_start[], lguest_noirq_end[];
33 extern const char lgstart_cli[], lgend_cli[];
34 extern const char lgstart_sti[], lgend_sti[];
35 extern const char lgstart_popf[], lgend_popf[];
36 extern const char lgstart_pushf[], lgend_pushf[];
37 extern const char lgstart_iret[], lgend_iret[];
39 extern void lguest_iret(void);
40 extern void lguest_init(void);
43 /* Manually saved part. */
44 unsigned long eax, ebx, ecx, edx;
45 unsigned long esi, edi, ebp;
47 unsigned long fs, ds, es;
48 unsigned long trapnum, errcode;
49 /* Trap pushed part */
57 /* This is a guest-specific page (mapped ro) into the guest. */
58 struct lguest_ro_state {
59 /* Host information we need to restore when we switch back. */
61 struct desc_ptr host_idt_desc;
62 struct desc_ptr host_gdt_desc;
65 /* Fields which are used when guest is running. */
66 struct desc_ptr guest_idt_desc;
67 struct desc_ptr guest_gdt_desc;
68 struct x86_hw_tss guest_tss;
69 struct desc_struct guest_idt[IDT_ENTRIES];
70 struct desc_struct guest_gdt[GDT_ENTRIES];
74 /* The GDT entries copied into lguest_ro_state when running. */
75 struct desc_struct gdt[GDT_ENTRIES];
77 /* The IDT entries: some copied into lguest_ro_state when running. */
78 struct desc_struct idt[IDT_ENTRIES];
80 /* The address of the last guest-visible pagefault (ie. cr2). */
81 unsigned long last_pagefault;
84 static inline void lguest_set_ts(void)
93 /* Full 4G segment descriptors, suitable for CS and DS. */
94 #define FULL_EXEC_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9b00} } })
95 #define FULL_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9300} } })
97 #endif /* __ASSEMBLY__ */
99 #endif /* _ASM_X86_LGUEST_H */