98 строки
2.6 KiB
C
98 строки
2.6 KiB
C
#ifndef _X86_LGUEST_H
|
|
#define _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
|