Release 4.11 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 SWITCHER_TEXT_PAGES (1)

#define SWITCHER_STACK_PAGES (2 * nr_cpu_ids)

#define TOTAL_SWITCHER_PAGES (SWITCHER_TEXT_PAGES + SWITCHER_STACK_PAGES)

/* 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);
}

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/* 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 */
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Directory: arch/x86/include/asm

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