debuggers.hg

view xen/include/public/arch-x86/xen.h @ 0:7d21f7218375

Exact replica of unstable on 051908 + README-this
author Mukesh Rathor
date Mon May 19 15:34:57 2008 -0700 (2008-05-19)
parents
children 5c0bf00e371d
line source
1 /******************************************************************************
2 * arch-x86/xen.h
3 *
4 * Guest OS interface to x86 Xen.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Copyright (c) 2004-2006, K A Fraser
25 */
27 #include "../xen.h"
29 #ifndef __XEN_PUBLIC_ARCH_X86_XEN_H__
30 #define __XEN_PUBLIC_ARCH_X86_XEN_H__
32 /* Structural guest handles introduced in 0x00030201. */
33 #if __XEN_INTERFACE_VERSION__ >= 0x00030201
34 #define ___DEFINE_XEN_GUEST_HANDLE(name, type) \
35 typedef struct { type *p; } __guest_handle_ ## name
36 #else
37 #define ___DEFINE_XEN_GUEST_HANDLE(name, type) \
38 typedef type * __guest_handle_ ## name
39 #endif
41 #define __DEFINE_XEN_GUEST_HANDLE(name, type) \
42 ___DEFINE_XEN_GUEST_HANDLE(name, type); \
43 ___DEFINE_XEN_GUEST_HANDLE(const_##name, const type)
44 #define DEFINE_XEN_GUEST_HANDLE(name) __DEFINE_XEN_GUEST_HANDLE(name, name)
45 #define __XEN_GUEST_HANDLE(name) __guest_handle_ ## name
46 #define XEN_GUEST_HANDLE(name) __XEN_GUEST_HANDLE(name)
47 #define set_xen_guest_handle(hnd, val) do { (hnd).p = val; } while (0)
48 #ifdef __XEN_TOOLS__
49 #define get_xen_guest_handle(val, hnd) do { val = (hnd).p; } while (0)
50 #endif
52 #if defined(__i386__)
53 #include "xen-x86_32.h"
54 #elif defined(__x86_64__)
55 #include "xen-x86_64.h"
56 #endif
58 #ifndef __ASSEMBLY__
59 typedef unsigned long xen_pfn_t;
60 #define PRI_xen_pfn "lx"
61 #endif
63 /*
64 * SEGMENT DESCRIPTOR TABLES
65 */
66 /*
67 * A number of GDT entries are reserved by Xen. These are not situated at the
68 * start of the GDT because some stupid OSes export hard-coded selector values
69 * in their ABI. These hard-coded values are always near the start of the GDT,
70 * so Xen places itself out of the way, at the far end of the GDT.
71 */
72 #define FIRST_RESERVED_GDT_PAGE 14
73 #define FIRST_RESERVED_GDT_BYTE (FIRST_RESERVED_GDT_PAGE * 4096)
74 #define FIRST_RESERVED_GDT_ENTRY (FIRST_RESERVED_GDT_BYTE / 8)
76 /* Maximum number of virtual CPUs in multi-processor guests. */
77 #define MAX_VIRT_CPUS 32
79 #ifndef __ASSEMBLY__
81 typedef unsigned long xen_ulong_t;
83 /*
84 * Send an array of these to HYPERVISOR_set_trap_table().
85 * The privilege level specifies which modes may enter a trap via a software
86 * interrupt. On x86/64, since rings 1 and 2 are unavailable, we allocate
87 * privilege levels as follows:
88 * Level == 0: Noone may enter
89 * Level == 1: Kernel may enter
90 * Level == 2: Kernel may enter
91 * Level == 3: Everyone may enter
92 */
93 #define TI_GET_DPL(_ti) ((_ti)->flags & 3)
94 #define TI_GET_IF(_ti) ((_ti)->flags & 4)
95 #define TI_SET_DPL(_ti,_dpl) ((_ti)->flags |= (_dpl))
96 #define TI_SET_IF(_ti,_if) ((_ti)->flags |= ((!!(_if))<<2))
97 struct trap_info {
98 uint8_t vector; /* exception vector */
99 uint8_t flags; /* 0-3: privilege level; 4: clear event enable? */
100 uint16_t cs; /* code selector */
101 unsigned long address; /* code offset */
102 };
103 typedef struct trap_info trap_info_t;
104 DEFINE_XEN_GUEST_HANDLE(trap_info_t);
106 typedef uint64_t tsc_timestamp_t; /* RDTSC timestamp */
108 /*
109 * The following is all CPU context. Note that the fpu_ctxt block is filled
110 * in by FXSAVE if the CPU has feature FXSR; otherwise FSAVE is used.
111 */
112 struct vcpu_guest_context {
113 /* FPU registers come first so they can be aligned for FXSAVE/FXRSTOR. */
114 struct { char x[512]; } fpu_ctxt; /* User-level FPU registers */
115 #define VGCF_I387_VALID (1<<0)
116 #define VGCF_IN_KERNEL (1<<2)
117 #define _VGCF_i387_valid 0
118 #define VGCF_i387_valid (1<<_VGCF_i387_valid)
119 #define _VGCF_in_kernel 2
120 #define VGCF_in_kernel (1<<_VGCF_in_kernel)
121 #define _VGCF_failsafe_disables_events 3
122 #define VGCF_failsafe_disables_events (1<<_VGCF_failsafe_disables_events)
123 #define _VGCF_syscall_disables_events 4
124 #define VGCF_syscall_disables_events (1<<_VGCF_syscall_disables_events)
125 #define _VGCF_online 5
126 #define VGCF_online (1<<_VGCF_online)
127 unsigned long flags; /* VGCF_* flags */
128 struct cpu_user_regs user_regs; /* User-level CPU registers */
129 struct trap_info trap_ctxt[256]; /* Virtual IDT */
130 unsigned long ldt_base, ldt_ents; /* LDT (linear address, # ents) */
131 unsigned long gdt_frames[16], gdt_ents; /* GDT (machine frames, # ents) */
132 unsigned long kernel_ss, kernel_sp; /* Virtual TSS (only SS1/SP1) */
133 /* NB. User pagetable on x86/64 is placed in ctrlreg[1]. */
134 unsigned long ctrlreg[8]; /* CR0-CR7 (control registers) */
135 unsigned long debugreg[8]; /* DB0-DB7 (debug registers) */
136 #ifdef __i386__
137 unsigned long event_callback_cs; /* CS:EIP of event callback */
138 unsigned long event_callback_eip;
139 unsigned long failsafe_callback_cs; /* CS:EIP of failsafe callback */
140 unsigned long failsafe_callback_eip;
141 #else
142 unsigned long event_callback_eip;
143 unsigned long failsafe_callback_eip;
144 #ifdef __XEN__
145 union {
146 unsigned long syscall_callback_eip;
147 struct {
148 unsigned int event_callback_cs; /* compat CS of event cb */
149 unsigned int failsafe_callback_cs; /* compat CS of failsafe cb */
150 };
151 };
152 #else
153 unsigned long syscall_callback_eip;
154 #endif
155 #endif
156 unsigned long vm_assist; /* VMASST_TYPE_* bitmap */
157 #ifdef __x86_64__
158 /* Segment base addresses. */
159 uint64_t fs_base;
160 uint64_t gs_base_kernel;
161 uint64_t gs_base_user;
162 #endif
163 };
164 typedef struct vcpu_guest_context vcpu_guest_context_t;
165 DEFINE_XEN_GUEST_HANDLE(vcpu_guest_context_t);
167 struct arch_shared_info {
168 unsigned long max_pfn; /* max pfn that appears in table */
169 /* Frame containing list of mfns containing list of mfns containing p2m. */
170 xen_pfn_t pfn_to_mfn_frame_list_list;
171 unsigned long nmi_reason;
172 uint64_t pad[32];
173 };
174 typedef struct arch_shared_info arch_shared_info_t;
176 #endif /* !__ASSEMBLY__ */
178 /*
179 * Prefix forces emulation of some non-trapping instructions.
180 * Currently only CPUID.
181 */
182 #ifdef __ASSEMBLY__
183 #define XEN_EMULATE_PREFIX .byte 0x0f,0x0b,0x78,0x65,0x6e ;
184 #define XEN_CPUID XEN_EMULATE_PREFIX cpuid
185 #else
186 #define XEN_EMULATE_PREFIX ".byte 0x0f,0x0b,0x78,0x65,0x6e ; "
187 #define XEN_CPUID XEN_EMULATE_PREFIX "cpuid"
188 #endif
190 #endif /* __XEN_PUBLIC_ARCH_X86_XEN_H__ */
192 /*
193 * Local variables:
194 * mode: C
195 * c-set-style: "BSD"
196 * c-basic-offset: 4
197 * tab-width: 4
198 * indent-tabs-mode: nil
199 * End:
200 */