#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_cpu_ids) /* We map at -4M (-2M for PAE) for ease of mapping (one PTE page). */ #ifdef CONFIG_X86_PAE #define SWITCHER_ADDR 0xFFE00000 #else #define SWITCHER_ADDR 0xFFC00000 #endif /* 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)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 */