[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-x86 / 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

/* Every guest maps the core switcher code. */
#define SHARED_SWITCHER_PAGES \
	DIV_ROUND_UP(end_switcher_text - start_switcher_text, PAGE_SIZE)
/* Pages for switcher itself, then two pages per cpu */
#define TOTAL_SWITCHER_PAGES (SHARED_SWITCHER_PAGES + 2 * NR_CPUS)

/* We map at -4M for ease of mapping into the guest (one PTE page). */
#define SWITCHER_ADDR 0xFFC00000

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

/* Declarations for definitions in lguest_guest.S */
extern char lguest_noirq_start[], lguest_noirq_end[];
extern const char lgstart_cli[], lgend_cli[];
extern const char lgstart_sti[], lgend_sti[];
extern const char lgstart_popf[], lgend_popf[];
extern const char lgstart_pushf[], lgend_pushf[];
extern const char lgstart_iret[], lgend_iret[];

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){ { {0x0000ffff, 0x00cf9b00} } })
#define FULL_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9300} } })

#endif /* __ASSEMBLY__ */

#endif /* ASM_X86__LGUEST_H */
Commit	Line	Data
77ef50a5 VN	1	#ifndef ASM_X86__LGUEST_H
77ef50a5 VN	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
	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)
	19
	20	/* We map at -4M for ease of mapping into the guest (one PTE page). */
	21	#define SWITCHER_ADDR 0xFFC00000
	22
	23	/* Found in switcher.S */
	24	extern unsigned long default_idt_entries[];
	25
cbc34973 HH	26	/* Declarations for definitions in lguest_guest.S */
	27	extern char lguest_noirq_start[], lguest_noirq_end[];
	28	extern const char lgstart_cli[], lgend_cli[];
	29	extern const char lgstart_sti[], lgend_sti[];
	30	extern const char lgstart_popf[], lgend_popf[];
	31	extern const char lgstart_pushf[], lgend_pushf[];
	32	extern const char lgstart_iret[], lgend_iret[];
	33
	34	extern void lguest_iret(void);
	35	extern void lguest_init(void);
	36
fb444c7b	37	struct lguest_regs {
625efab1	38	/* Manually saved part. */
4614a3a3	39	unsigned long eax, ebx, ecx, edx;
625efab1 JS	40	unsigned long esi, edi, ebp;
625efab1 JS	41	unsigned long gs;
625efab1 JS	42	unsigned long fs, ds, es;
	43	unsigned long trapnum, errcode;
	44	/* Trap pushed part */
	45	unsigned long eip;
	46	unsigned long cs;
	47	unsigned long eflags;
	48	unsigned long esp;
	49	unsigned long ss;
	50	};
	51
	52	/* This is a guest-specific page (mapped ro) into the guest. */
fb444c7b	53	struct lguest_ro_state {
625efab1 JS	54	/* Host information we need to restore when we switch back. */
625efab1 JS	55	u32 host_cr3;
6b68f01b GOC	56	struct desc_ptr host_idt_desc;
6b68f01b GOC	57	struct desc_ptr host_gdt_desc;
625efab1 JS	58	u32 host_sp;
	59
	60	/* Fields which are used when guest is running. */
6b68f01b GOC	61	struct desc_ptr guest_idt_desc;
6b68f01b GOC	62	struct desc_ptr guest_gdt_desc;
ca241c75	63	struct x86_hw_tss guest_tss;
625efab1 JS	64	struct desc_struct guest_idt[IDT_ENTRIES];
	65	struct desc_struct guest_gdt[GDT_ENTRIES];
	66	};
	67
fb444c7b	68	struct lg_cpu_arch {
625efab1 JS	69	/* The GDT entries copied into lguest_ro_state when running. */
	70	struct desc_struct gdt[GDT_ENTRIES];
	71
	72	/* The IDT entries: some copied into lguest_ro_state when running. */
	73	struct desc_struct idt[IDT_ENTRIES];
	74
	75	/* The address of the last guest-visible pagefault (ie. cr2). */
	76	unsigned long last_pagefault;
	77	};
	78
	79	static inline void lguest_set_ts(void)
	80	{
	81	u32 cr0;
	82
	83	cr0 = read_cr0();
	84	if (!(cr0 & 8))
fb444c7b	85	write_cr0(cr0 \| 8);
625efab1 JS	86	}
	87
	88	/* Full 4G segment descriptors, suitable for CS and DS. */
6842ef0e GOC	89	#define FULL_EXEC_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9b00} } })
6842ef0e GOC	90	#define FULL_SEGMENT ((struct desc_struct){ { {0x0000ffff, 0x00cf9300} } })
625efab1 JS	91
	92	#endif /* __ASSEMBLY__ */
	93
77ef50a5	94	#endif /* ASM_X86__LGUEST_H */