103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/******************************************************************************
|
|
* arch-x86_32.h
|
|
*
|
|
* Guest OS interface to x86 32-bit Xen.
|
|
*
|
|
* Copyright (c) 2004, K A Fraser
|
|
*/
|
|
|
|
#ifndef _ASM_X86_XEN_INTERFACE_32_H
|
|
#define _ASM_X86_XEN_INTERFACE_32_H
|
|
|
|
|
|
/*
|
|
* These flat segments are in the Xen-private section of every GDT. Since these
|
|
* are also present in the initial GDT, many OSes will be able to avoid
|
|
* installing their own GDT.
|
|
*/
|
|
#define FLAT_RING1_CS 0xe019 /* GDT index 259 */
|
|
#define FLAT_RING1_DS 0xe021 /* GDT index 260 */
|
|
#define FLAT_RING1_SS 0xe021 /* GDT index 260 */
|
|
#define FLAT_RING3_CS 0xe02b /* GDT index 261 */
|
|
#define FLAT_RING3_DS 0xe033 /* GDT index 262 */
|
|
#define FLAT_RING3_SS 0xe033 /* GDT index 262 */
|
|
|
|
#define FLAT_KERNEL_CS FLAT_RING1_CS
|
|
#define FLAT_KERNEL_DS FLAT_RING1_DS
|
|
#define FLAT_KERNEL_SS FLAT_RING1_SS
|
|
#define FLAT_USER_CS FLAT_RING3_CS
|
|
#define FLAT_USER_DS FLAT_RING3_DS
|
|
#define FLAT_USER_SS FLAT_RING3_SS
|
|
|
|
/* And the trap vector is... */
|
|
#define TRAP_INSTR "int $0x82"
|
|
|
|
#define __MACH2PHYS_VIRT_START 0xF5800000
|
|
#define __MACH2PHYS_VIRT_END 0xF6800000
|
|
|
|
#define __MACH2PHYS_SHIFT 2
|
|
|
|
/*
|
|
* Virtual addresses beyond this are not modifiable by guest OSes. The
|
|
* machine->physical mapping table starts at this address, read-only.
|
|
*/
|
|
#define __HYPERVISOR_VIRT_START 0xF5800000
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
struct cpu_user_regs {
|
|
uint32_t ebx;
|
|
uint32_t ecx;
|
|
uint32_t edx;
|
|
uint32_t esi;
|
|
uint32_t edi;
|
|
uint32_t ebp;
|
|
uint32_t eax;
|
|
uint16_t error_code; /* private */
|
|
uint16_t entry_vector; /* private */
|
|
uint32_t eip;
|
|
uint16_t cs;
|
|
uint8_t saved_upcall_mask;
|
|
uint8_t _pad0;
|
|
uint32_t eflags; /* eflags.IF == !saved_upcall_mask */
|
|
uint32_t esp;
|
|
uint16_t ss, _pad1;
|
|
uint16_t es, _pad2;
|
|
uint16_t ds, _pad3;
|
|
uint16_t fs, _pad4;
|
|
uint16_t gs, _pad5;
|
|
};
|
|
DEFINE_GUEST_HANDLE_STRUCT(cpu_user_regs);
|
|
|
|
typedef uint64_t tsc_timestamp_t; /* RDTSC timestamp */
|
|
|
|
struct arch_vcpu_info {
|
|
unsigned long cr2;
|
|
unsigned long pad[5]; /* sizeof(struct vcpu_info) == 64 */
|
|
};
|
|
|
|
struct xen_callback {
|
|
unsigned long cs;
|
|
unsigned long eip;
|
|
};
|
|
typedef struct xen_callback xen_callback_t;
|
|
|
|
#define XEN_CALLBACK(__cs, __eip) \
|
|
((struct xen_callback){ .cs = (__cs), .eip = (unsigned long)(__eip) })
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
|
|
/*
|
|
* Page-directory addresses above 4GB do not fit into architectural %cr3.
|
|
* When accessing %cr3, or equivalent field in vcpu_guest_context, guests
|
|
* must use the following accessor macros to pack/unpack valid MFNs.
|
|
*
|
|
* Note that Xen is using the fact that the pagetable base is always
|
|
* page-aligned, and putting the 12 MSB of the address into the 12 LSB
|
|
* of cr3.
|
|
*/
|
|
#define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20))
|
|
#define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20))
|
|
|
|
#endif /* _ASM_X86_XEN_INTERFACE_32_H */
|