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89 lines
2.3 KiB
89 lines
2.3 KiB
#ifndef _ASM_X86_LGUEST_H |
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#define _ASM_X86_LGUEST_H |
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#define GDT_ENTRY_LGUEST_CS 10 |
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#define GDT_ENTRY_LGUEST_DS 11 |
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#define LGUEST_CS (GDT_ENTRY_LGUEST_CS * 8) |
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#define LGUEST_DS (GDT_ENTRY_LGUEST_DS * 8) |
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#ifndef __ASSEMBLY__ |
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#include <asm/desc.h> |
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#define GUEST_PL 1 |
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/* Page for Switcher text itself, then two pages per cpu */ |
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#define TOTAL_SWITCHER_PAGES (1 + 2 * nr_cpu_ids) |
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/* Where we map the Switcher, in both Host and Guest. */ |
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extern unsigned long switcher_addr; |
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/* Found in switcher.S */ |
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extern unsigned long default_idt_entries[]; |
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/* Declarations for definitions in arch/x86/lguest/head_32.S */ |
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extern char lguest_noirq_iret[]; |
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extern const char lgstart_cli[], lgend_cli[]; |
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extern const char lgstart_pushf[], lgend_pushf[]; |
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extern void lguest_iret(void); |
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extern void lguest_init(void); |
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struct lguest_regs { |
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/* Manually saved part. */ |
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unsigned long eax, ebx, ecx, edx; |
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unsigned long esi, edi, ebp; |
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unsigned long gs; |
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unsigned long fs, ds, es; |
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unsigned long trapnum, errcode; |
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/* Trap pushed part */ |
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unsigned long eip; |
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unsigned long cs; |
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unsigned long eflags; |
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unsigned long esp; |
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unsigned long ss; |
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}; |
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/* This is a guest-specific page (mapped ro) into the guest. */ |
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struct lguest_ro_state { |
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/* Host information we need to restore when we switch back. */ |
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u32 host_cr3; |
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struct desc_ptr host_idt_desc; |
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struct desc_ptr host_gdt_desc; |
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u32 host_sp; |
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/* Fields which are used when guest is running. */ |
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struct desc_ptr guest_idt_desc; |
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struct desc_ptr guest_gdt_desc; |
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struct x86_hw_tss guest_tss; |
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struct desc_struct guest_idt[IDT_ENTRIES]; |
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struct desc_struct guest_gdt[GDT_ENTRIES]; |
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}; |
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struct lg_cpu_arch { |
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/* The GDT entries copied into lguest_ro_state when running. */ |
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struct desc_struct gdt[GDT_ENTRIES]; |
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/* The IDT entries: some copied into lguest_ro_state when running. */ |
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struct desc_struct idt[IDT_ENTRIES]; |
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/* The address of the last guest-visible pagefault (ie. cr2). */ |
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unsigned long last_pagefault; |
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}; |
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static inline void lguest_set_ts(void) |
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{ |
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u32 cr0; |
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cr0 = read_cr0(); |
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if (!(cr0 & 8)) |
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write_cr0(cr0 | 8); |
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} |
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/* Full 4G segment descriptors, suitable for CS and DS. */ |
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#define FULL_EXEC_SEGMENT \ |
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((struct desc_struct)GDT_ENTRY_INIT(0xc09b, 0, 0xfffff)) |
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#define FULL_SEGMENT ((struct desc_struct)GDT_ENTRY_INIT(0xc093, 0, 0xfffff)) |
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#endif /* __ASSEMBLY__ */ |
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#endif /* _ASM_X86_LGUEST_H */
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