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/******************************************************************************
* arch-x86_64.h
*
* Guest OS interface to x86 64-bit Xen.
*/
#ifndef __XEN_PUBLIC_ARCH_X86_64_H__
#define __XEN_PUBLIC_ARCH_X86_64_H__
/* Pointers are naturally 64 bits in this architecture; no padding needed. */
#define _MEMORY_PADDING(_X)
#define MEMORY_PADDING
/*
* SEGMENT DESCRIPTOR TABLES
*/
/*
* A number of GDT entries are reserved by Xen. These are not situated at the
* start of the GDT because some stupid OSes export hard-coded selector values
* in their ABI. These hard-coded values are always near the start of the GDT,
* so Xen places itself out of the way.
*
* NB. The reserved range is inclusive (that is, both FIRST_RESERVED_GDT_ENTRY
* and LAST_RESERVED_GDT_ENTRY are reserved).
*/
#define NR_RESERVED_GDT_ENTRIES 40
#define FIRST_RESERVED_GDT_ENTRY 256
#define LAST_RESERVED_GDT_ENTRY \
(FIRST_RESERVED_GDT_ENTRY + NR_RESERVED_GDT_ENTRIES - 1)
/*
* 64-bit segment selectors
* 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_RING3_CS32 0x0823 /* GDT index 260 */
#define FLAT_RING3_CS64 0x082b /* GDT index 261 */
#define FLAT_RING3_DS 0x0833 /* GDT index 262 */
#define FLAT_GUESTOS_DS FLAT_RING3_DS
#define FLAT_GUESTOS_CS FLAT_RING3_CS64
#define FLAT_GUESTOS_CS32 FLAT_RING3_CS32
#define FLAT_USER_DS FLAT_RING3_DS
#define FLAT_USER_CS FLAT_RING3_CS64
#define FLAT_USER_CS32 FLAT_RING3_CS32
/* And the trap vector is... */
#define TRAP_INSTR "syscall"
/* The machine->physical mapping table starts at this address, read-only. */
#ifndef machine_to_phys_mapping
#define machine_to_phys_mapping ((unsigned long *)0xffff810000000000ULL)
#endif
#ifndef __ASSEMBLY__
/* NB. Both the following are 64 bits each. */
typedef unsigned long memory_t; /* Full-sized pointer/address/memory-size. */
typedef unsigned long cpureg_t; /* Full-sized register. */
/*
* Send an array of these to HYPERVISOR_set_trap_table()
*/
#define TI_GET_DPL(_ti) ((_ti)->flags & 3)
#define TI_GET_IF(_ti) ((_ti)->flags & 4)
#define TI_SET_DPL(_ti,_dpl) ((_ti)->flags |= (_dpl))
#define TI_SET_IF(_ti,_if) ((_ti)->flags |= ((!!(_if))<<2))
typedef struct {
u8 vector; /* 0: exception vector */
u8 flags; /* 1: 0-3: privilege level; 4: clear event enable? */
u16 cs; /* 2: code selector */
u32 __pad; /* 4 */
memory_t address; /* 8: code address */
} PACKED trap_info_t; /* 16 bytes */
typedef struct
{
unsigned long r15;
unsigned long r14;
unsigned long r13;
unsigned long r12;
unsigned long rbp;
unsigned long rbx;
unsigned long r11;
unsigned long r10;
unsigned long r9;
unsigned long r8;
unsigned long rax;
unsigned long rcx;
unsigned long rdx;
unsigned long rsi;
unsigned long rdi;
unsigned long rip;
unsigned long cs;
unsigned long eflags;
unsigned long rsp;
unsigned long ss;
} PACKED execution_context_t;
typedef u64 tsc_timestamp_t; /* RDTSC timestamp */
/*
* The following is all CPU context. Note that the i387_ctxt block is filled
* in by FXSAVE if the CPU has feature FXSR; otherwise FSAVE is used.
*/
typedef struct {
#define ECF_I387_VALID (1<<0)
unsigned long flags;
execution_context_t cpu_ctxt; /* User-level CPU registers */
char fpu_ctxt[512]; /* User-level FPU registers */
trap_info_t trap_ctxt[256]; /* Virtual IDT */
unsigned long ldt_base, ldt_ents; /* LDT (linear address, # ents) */
unsigned long gdt_frames[16], gdt_ents; /* GDT (machine frames, # ents) */
unsigned long guestos_ss, guestos_esp; /* Virtual TSS (only SS1/ESP1) */
unsigned long pt_base; /* CR3 (pagetable base) */
unsigned long debugreg[8]; /* DB0-DB7 (debug registers) */
unsigned long event_callback_cs; /* CS:EIP of event callback */
unsigned long event_callback_eip;
unsigned long failsafe_callback_cs; /* CS:EIP of failsafe callback */
unsigned long failsafe_callback_eip;
} PACKED full_execution_context_t;
typedef struct {
u64 mfn_to_pfn_start; /* MFN of start of m2p table */
u64 pfn_to_mfn_frame_list; /* MFN of a table of MFNs that
make up p2m table */
} PACKED arch_shared_info_t;
#endif /* !__ASSEMBLY__ */
#endif
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