projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1965aae3 PA |
1 | #ifndef _ASM_X86_LGUEST_H |
| 2 | #define _ASM_X86_LGUEST_H | |
| 625efab1 JS |
3 | |
| 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) | |
| 8 | ||
| 9 | #ifndef __ASSEMBLY__ | |
| 10 | #include <asm/desc.h> | |
| 11 | ||
| 12 | #define GUEST_PL 1 | |
| 13 | ||
| 93a2cdff RR |
14 | /* Page for Switcher text itself, then two pages per cpu */ |
| 15 | #define TOTAL_SWITCHER_PAGES (1 + 2 * nr_cpu_ids) | |
| 625efab1 | 16 | |
| 406a590b RR |
17 | /* Where we map the Switcher, in both Host and Guest. */ |
| 18 | extern unsigned long switcher_addr; | |
| 625efab1 JS |
19 | |
| 20 | /* Found in switcher.S */ | |
| 21 | extern unsigned long default_idt_entries[]; | |
| 22 | ||
| cbc34973 HH |
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[]; | |
| 30 | ||
| 31 | extern void lguest_iret(void); | |
| 32 | extern void lguest_init(void); | |
| 33 | ||
| fb444c7b | 34 | struct lguest_regs { |
| 625efab1 | 35 | /* Manually saved part. */ |
| 4614a3a3 | 36 | unsigned long eax, ebx, ecx, edx; |
| 625efab1 JS |
37 | unsigned long esi, edi, ebp; |
| 38 | unsigned long gs; | |
| 625efab1 JS |
39 | unsigned long fs, ds, es; |
| 40 | unsigned long trapnum, errcode; | |
| 41 | /* Trap pushed part */ | |
| 42 | unsigned long eip; | |
| 43 | unsigned long cs; | |
| 44 | unsigned long eflags; | |
| 45 | unsigned long esp; | |
| 46 | unsigned long ss; | |
| 47 | }; | |
| 48 | ||
| 49 | /* This is a guest-specific page (mapped ro) into the guest. */ | |
| fb444c7b | 50 | struct lguest_ro_state { |
| 625efab1 JS |
51 | /* Host information we need to restore when we switch back. */ |
| 52 | u32 host_cr3; | |
| 6b68f01b GOC |
53 | struct desc_ptr host_idt_desc; |
| 54 | struct desc_ptr host_gdt_desc; | |
| 625efab1 JS |
55 | u32 host_sp; |
| 56 | ||
| 57 | /* Fields which are used when guest is running. */ | |
| 6b68f01b GOC |
58 | struct desc_ptr guest_idt_desc; |
| 59 | struct desc_ptr guest_gdt_desc; | |
| ca241c75 | 60 | struct x86_hw_tss guest_tss; |
| 625efab1 JS |
61 | struct desc_struct guest_idt[IDT_ENTRIES]; |
| 62 | struct desc_struct guest_gdt[GDT_ENTRIES]; | |
| 63 | }; | |
| 64 | ||
| fb444c7b | 65 | struct lg_cpu_arch { |
| 625efab1 JS |
66 | /* The GDT entries copied into lguest_ro_state when running. */ |
| 67 | struct desc_struct gdt[GDT_ENTRIES]; | |
| 68 | ||
| 69 | /* The IDT entries: some copied into lguest_ro_state when running. */ | |
| 70 | struct desc_struct idt[IDT_ENTRIES]; | |
| 71 | ||
| 72 | /* The address of the last guest-visible pagefault (ie. cr2). */ | |
| 73 | unsigned long last_pagefault; | |
| 74 | }; | |
| 75 | ||
| 76 | static inline void lguest_set_ts(void) | |
| 77 | { | |
| 78 | u32 cr0; | |
| 79 | ||
| 80 | cr0 = read_cr0(); | |
| 81 | if (!(cr0 & 8)) | |
| fb444c7b | 82 | write_cr0(cr0 | 8); |
| 625efab1 JS |
83 | } |
| 84 | ||
| 85 | /* Full 4G segment descriptors, suitable for CS and DS. */ | |
| 1e5de182 AM |
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)) | |
| 625efab1 JS |
89 | |
| 90 | #endif /* __ASSEMBLY__ */ | |
| 91 | ||
| 1965aae3 | 92 | #endif /* _ASM_X86_LGUEST_H */ |