ia64/xen-unstable

view xen/include/public/arch-x86/xen-x86_64.h @ 17230:1efc81ab19cd

x86_64: Make VGCF_in_syscall definition available to assembly code.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Mar 18 11:15:20 2008 +0000 (2008-03-18)
parents 7c5eea5feebd
children f5e6cccfdda5
line source
1 /******************************************************************************
2 * xen-x86_64.h
3 *
4 * Guest OS interface to x86 64-bit 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 #ifndef __XEN_PUBLIC_ARCH_X86_XEN_X86_64_H__
28 #define __XEN_PUBLIC_ARCH_X86_XEN_X86_64_H__
30 /*
31 * Hypercall interface:
32 * Input: %rdi, %rsi, %rdx, %r10, %r8 (arguments 1-5)
33 * Output: %rax
34 * Access is via hypercall page (set up by guest loader or via a Xen MSR):
35 * call hypercall_page + hypercall-number * 32
36 * Clobbered: argument registers (e.g., 2-arg hypercall clobbers %rdi,%rsi)
37 */
39 #if __XEN_INTERFACE_VERSION__ < 0x00030203
40 /*
41 * Legacy hypercall interface:
42 * As above, except the entry sequence to the hypervisor is:
43 * mov $hypercall-number*32,%eax ; syscall
44 * Clobbered: %rcx, %r11, argument registers (as above)
45 */
46 #define TRAP_INSTR "syscall"
47 #endif
49 /*
50 * 64-bit segment selectors
51 * These flat segments are in the Xen-private section of every GDT. Since these
52 * are also present in the initial GDT, many OSes will be able to avoid
53 * installing their own GDT.
54 */
56 #define FLAT_RING3_CS32 0xe023 /* GDT index 260 */
57 #define FLAT_RING3_CS64 0xe033 /* GDT index 261 */
58 #define FLAT_RING3_DS32 0xe02b /* GDT index 262 */
59 #define FLAT_RING3_DS64 0x0000 /* NULL selector */
60 #define FLAT_RING3_SS32 0xe02b /* GDT index 262 */
61 #define FLAT_RING3_SS64 0xe02b /* GDT index 262 */
63 #define FLAT_KERNEL_DS64 FLAT_RING3_DS64
64 #define FLAT_KERNEL_DS32 FLAT_RING3_DS32
65 #define FLAT_KERNEL_DS FLAT_KERNEL_DS64
66 #define FLAT_KERNEL_CS64 FLAT_RING3_CS64
67 #define FLAT_KERNEL_CS32 FLAT_RING3_CS32
68 #define FLAT_KERNEL_CS FLAT_KERNEL_CS64
69 #define FLAT_KERNEL_SS64 FLAT_RING3_SS64
70 #define FLAT_KERNEL_SS32 FLAT_RING3_SS32
71 #define FLAT_KERNEL_SS FLAT_KERNEL_SS64
73 #define FLAT_USER_DS64 FLAT_RING3_DS64
74 #define FLAT_USER_DS32 FLAT_RING3_DS32
75 #define FLAT_USER_DS FLAT_USER_DS64
76 #define FLAT_USER_CS64 FLAT_RING3_CS64
77 #define FLAT_USER_CS32 FLAT_RING3_CS32
78 #define FLAT_USER_CS FLAT_USER_CS64
79 #define FLAT_USER_SS64 FLAT_RING3_SS64
80 #define FLAT_USER_SS32 FLAT_RING3_SS32
81 #define FLAT_USER_SS FLAT_USER_SS64
83 #define __HYPERVISOR_VIRT_START 0xFFFF800000000000
84 #define __HYPERVISOR_VIRT_END 0xFFFF880000000000
85 #define __MACH2PHYS_VIRT_START 0xFFFF800000000000
86 #define __MACH2PHYS_VIRT_END 0xFFFF804000000000
88 #ifndef HYPERVISOR_VIRT_START
89 #define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START)
90 #define HYPERVISOR_VIRT_END mk_unsigned_long(__HYPERVISOR_VIRT_END)
91 #endif
93 #define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START)
94 #define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END)
95 #define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>3)
96 #ifndef machine_to_phys_mapping
97 #define machine_to_phys_mapping ((unsigned long *)HYPERVISOR_VIRT_START)
98 #endif
100 /*
101 * int HYPERVISOR_set_segment_base(unsigned int which, unsigned long base)
102 * @which == SEGBASE_* ; @base == 64-bit base address
103 * Returns 0 on success.
104 */
105 #define SEGBASE_FS 0
106 #define SEGBASE_GS_USER 1
107 #define SEGBASE_GS_KERNEL 2
108 #define SEGBASE_GS_USER_SEL 3 /* Set user %gs specified in base[15:0] */
110 /*
111 * int HYPERVISOR_iret(void)
112 * All arguments are on the kernel stack, in the following format.
113 * Never returns if successful. Current kernel context is lost.
114 * The saved CS is mapped as follows:
115 * RING0 -> RING3 kernel mode.
116 * RING1 -> RING3 kernel mode.
117 * RING2 -> RING3 kernel mode.
118 * RING3 -> RING3 user mode.
119 * However RING0 indicates that the guest kernel should return to iteself
120 * directly with
121 * orb $3,1*8(%rsp)
122 * iretq
123 * If flags contains VGCF_in_syscall:
124 * Restore RAX, RIP, RFLAGS, RSP.
125 * Discard R11, RCX, CS, SS.
126 * Otherwise:
127 * Restore RAX, R11, RCX, CS:RIP, RFLAGS, SS:RSP.
128 * All other registers are saved on hypercall entry and restored to user.
129 */
130 /* Guest exited in SYSCALL context? Return to guest with SYSRET? */
131 #define _VGCF_in_syscall 8
132 #define VGCF_in_syscall (1<<_VGCF_in_syscall)
133 #define VGCF_IN_SYSCALL VGCF_in_syscall
135 #ifndef __ASSEMBLY__
137 struct iret_context {
138 /* Top of stack (%rsp at point of hypercall). */
139 uint64_t rax, r11, rcx, flags, rip, cs, rflags, rsp, ss;
140 /* Bottom of iret stack frame. */
141 };
143 #ifdef __GNUC__
144 /* Anonymous union includes both 32- and 64-bit names (e.g., eax/rax). */
145 #define __DECL_REG(name) union { \
146 uint64_t r ## name, e ## name; \
147 uint32_t _e ## name; \
148 }
149 #else
150 /* Non-gcc sources must always use the proper 64-bit name (e.g., rax). */
151 #define __DECL_REG(name) uint64_t r ## name
152 #endif
154 struct cpu_user_regs {
155 uint64_t r15;
156 uint64_t r14;
157 uint64_t r13;
158 uint64_t r12;
159 __DECL_REG(bp);
160 __DECL_REG(bx);
161 uint64_t r11;
162 uint64_t r10;
163 uint64_t r9;
164 uint64_t r8;
165 __DECL_REG(ax);
166 __DECL_REG(cx);
167 __DECL_REG(dx);
168 __DECL_REG(si);
169 __DECL_REG(di);
170 uint32_t error_code; /* private */
171 uint32_t entry_vector; /* private */
172 __DECL_REG(ip);
173 uint16_t cs, _pad0[1];
174 uint8_t saved_upcall_mask;
175 uint8_t _pad1[3];
176 __DECL_REG(flags); /* rflags.IF == !saved_upcall_mask */
177 __DECL_REG(sp);
178 uint16_t ss, _pad2[3];
179 uint16_t es, _pad3[3];
180 uint16_t ds, _pad4[3];
181 uint16_t fs, _pad5[3]; /* Non-zero => takes precedence over fs_base. */
182 uint16_t gs, _pad6[3]; /* Non-zero => takes precedence over gs_base_usr. */
183 };
184 typedef struct cpu_user_regs cpu_user_regs_t;
185 DEFINE_XEN_GUEST_HANDLE(cpu_user_regs_t);
187 #undef __DECL_REG
189 #define xen_pfn_to_cr3(pfn) ((unsigned long)(pfn) << 12)
190 #define xen_cr3_to_pfn(cr3) ((unsigned long)(cr3) >> 12)
192 struct arch_vcpu_info {
193 unsigned long cr2;
194 unsigned long pad; /* sizeof(vcpu_info_t) == 64 */
195 };
196 typedef struct arch_vcpu_info arch_vcpu_info_t;
198 typedef unsigned long xen_callback_t;
200 #endif /* !__ASSEMBLY__ */
202 #endif /* __XEN_PUBLIC_ARCH_X86_XEN_X86_64_H__ */
204 /*
205 * Local variables:
206 * mode: C
207 * c-set-style: "BSD"
208 * c-basic-offset: 4
209 * tab-width: 4
210 * indent-tabs-mode: nil
211 * End:
212 */