[deliverable/linux.git] / arch / x86 / include / asm / lguest.h

#ifndef _ASM_X86_LGUEST_H
#define _ASM_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 <asm/desc.h>

#define GUEST_PL 1

/* Page for Switcher text itself, then two pages per cpu */
#define TOTAL_SWITCHER_PAGES (1 + 2 * nr_cpu_ids)

/* Where we map the Switcher, in both Host and Guest. */
extern unsigned long switcher_addr;

/* Found in switcher.S */
extern unsigned long default_idt_entries[];

/* Declarations for definitions in arch/x86/lguest/head_32.S */
extern char lguest_noirq_iret[];
extern const char lgstart_cli[], lgend_cli[];
extern const char lgstart_pushf[], lgend_pushf[];

extern void lguest_iret(void);
extern void lguest_init(void);

struct lguest_regs {
	/* Manually saved part. */
	unsigned long eax, ebx, ecx, edx;
	unsigned long esi, edi, ebp;
	unsigned long gs;
	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 desc_ptr host_idt_desc;
	struct desc_ptr host_gdt_desc;
	u32 host_sp;

	/* Fields which are used when guest is running. */
	struct desc_ptr guest_idt_desc;
	struct desc_ptr guest_gdt_desc;
	struct x86_hw_tss guest_tss;
	struct desc_struct guest_idt[IDT_ENTRIES];
	struct desc_struct guest_gdt[GDT_ENTRIES];
};

struct lg_cpu_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)GDT_ENTRY_INIT(0xc09b, 0, 0xfffff))
#define FULL_SEGMENT ((struct desc_struct)GDT_ENTRY_INIT(0xc093, 0, 0xfffff))

#endif /* __ASSEMBLY__ */

#endif /* _ASM_X86_LGUEST_H */
Commit	Line	Data
1965aae3 PA	1	#ifndef _ASM_X86_LGUEST_H
1965aae3 PA	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 */
93a2cdff RR	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. */
406a590b RR	18	extern unsigned long switcher_addr;
625efab1 JS	19
	20	/* Found in switcher.S */
	21	extern unsigned long default_idt_entries[];
	22
2f921b5b RR	23	/* Declarations for definitions in arch/x86/lguest/head_32.S */
2f921b5b RR	24	extern char lguest_noirq_iret[];
cbc34973	25	extern const char lgstart_cli[], lgend_cli[];
cbc34973	26	extern const char lgstart_pushf[], lgend_pushf[];
cbc34973 HH	27
	28	extern void lguest_iret(void);
	29	extern void lguest_init(void);
	30
fb444c7b	31	struct lguest_regs {
625efab1	32	/* Manually saved part. */
4614a3a3	33	unsigned long eax, ebx, ecx, edx;
625efab1 JS	34	unsigned long esi, edi, ebp;
625efab1 JS	35	unsigned long gs;
625efab1 JS	36	unsigned long fs, ds, es;
	37	unsigned long trapnum, errcode;
	38	/* Trap pushed part */
	39	unsigned long eip;
	40	unsigned long cs;
	41	unsigned long eflags;
	42	unsigned long esp;
	43	unsigned long ss;
	44	};
	45
	46	/* This is a guest-specific page (mapped ro) into the guest. */
fb444c7b	47	struct lguest_ro_state {
625efab1 JS	48	/* Host information we need to restore when we switch back. */
625efab1 JS	49	u32 host_cr3;
6b68f01b GOC	50	struct desc_ptr host_idt_desc;
6b68f01b GOC	51	struct desc_ptr host_gdt_desc;
625efab1 JS	52	u32 host_sp;
	53
	54	/* Fields which are used when guest is running. */
6b68f01b GOC	55	struct desc_ptr guest_idt_desc;
6b68f01b GOC	56	struct desc_ptr guest_gdt_desc;
ca241c75	57	struct x86_hw_tss guest_tss;
625efab1 JS	58	struct desc_struct guest_idt[IDT_ENTRIES];
	59	struct desc_struct guest_gdt[GDT_ENTRIES];
	60	};
	61
fb444c7b	62	struct lg_cpu_arch {
625efab1 JS	63	/* The GDT entries copied into lguest_ro_state when running. */
	64	struct desc_struct gdt[GDT_ENTRIES];
	65
	66	/* The IDT entries: some copied into lguest_ro_state when running. */
	67	struct desc_struct idt[IDT_ENTRIES];
	68
	69	/* The address of the last guest-visible pagefault (ie. cr2). */
	70	unsigned long last_pagefault;
	71	};
	72
	73	static inline void lguest_set_ts(void)
	74	{
	75	u32 cr0;
	76
	77	cr0 = read_cr0();
	78	if (!(cr0 & 8))
fb444c7b	79	write_cr0(cr0 \| 8);
625efab1 JS	80	}
	81
	82	/* Full 4G segment descriptors, suitable for CS and DS. */
1e5de182 AM	83	#define FULL_EXEC_SEGMENT \
	84	((struct desc_struct)GDT_ENTRY_INIT(0xc09b, 0, 0xfffff))
	85	#define FULL_SEGMENT ((struct desc_struct)GDT_ENTRY_INIT(0xc093, 0, 0xfffff))
625efab1 JS	86
	87	#endif /* __ASSEMBLY__ */
	88
1965aae3	89	#endif /* _ASM_X86_LGUEST_H */