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1965aae3 PA |
1 | #ifndef _ASM_X86_XEN__INTERFACE_64_H |
2 | #define _ASM_X86_XEN__INTERFACE_64_H | |
48b5db20 JF |
3 | |
4 | /* | |
5 | * 64-bit segment selectors | |
6 | * These flat segments are in the Xen-private section of every GDT. Since these | |
7 | * are also present in the initial GDT, many OSes will be able to avoid | |
8 | * installing their own GDT. | |
9 | */ | |
10 | ||
11 | #define FLAT_RING3_CS32 0xe023 /* GDT index 260 */ | |
12 | #define FLAT_RING3_CS64 0xe033 /* GDT index 261 */ | |
13 | #define FLAT_RING3_DS32 0xe02b /* GDT index 262 */ | |
14 | #define FLAT_RING3_DS64 0x0000 /* NULL selector */ | |
15 | #define FLAT_RING3_SS32 0xe02b /* GDT index 262 */ | |
16 | #define FLAT_RING3_SS64 0xe02b /* GDT index 262 */ | |
17 | ||
18 | #define FLAT_KERNEL_DS64 FLAT_RING3_DS64 | |
19 | #define FLAT_KERNEL_DS32 FLAT_RING3_DS32 | |
20 | #define FLAT_KERNEL_DS FLAT_KERNEL_DS64 | |
21 | #define FLAT_KERNEL_CS64 FLAT_RING3_CS64 | |
22 | #define FLAT_KERNEL_CS32 FLAT_RING3_CS32 | |
23 | #define FLAT_KERNEL_CS FLAT_KERNEL_CS64 | |
24 | #define FLAT_KERNEL_SS64 FLAT_RING3_SS64 | |
25 | #define FLAT_KERNEL_SS32 FLAT_RING3_SS32 | |
26 | #define FLAT_KERNEL_SS FLAT_KERNEL_SS64 | |
27 | ||
28 | #define FLAT_USER_DS64 FLAT_RING3_DS64 | |
29 | #define FLAT_USER_DS32 FLAT_RING3_DS32 | |
30 | #define FLAT_USER_DS FLAT_USER_DS64 | |
31 | #define FLAT_USER_CS64 FLAT_RING3_CS64 | |
32 | #define FLAT_USER_CS32 FLAT_RING3_CS32 | |
33 | #define FLAT_USER_CS FLAT_USER_CS64 | |
34 | #define FLAT_USER_SS64 FLAT_RING3_SS64 | |
35 | #define FLAT_USER_SS32 FLAT_RING3_SS32 | |
36 | #define FLAT_USER_SS FLAT_USER_SS64 | |
37 | ||
38 | #define __HYPERVISOR_VIRT_START 0xFFFF800000000000 | |
39 | #define __HYPERVISOR_VIRT_END 0xFFFF880000000000 | |
40 | #define __MACH2PHYS_VIRT_START 0xFFFF800000000000 | |
41 | #define __MACH2PHYS_VIRT_END 0xFFFF804000000000 | |
42 | ||
43 | #ifndef HYPERVISOR_VIRT_START | |
44 | #define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START) | |
45 | #define HYPERVISOR_VIRT_END mk_unsigned_long(__HYPERVISOR_VIRT_END) | |
46 | #endif | |
47 | ||
48 | #define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START) | |
49 | #define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END) | |
50 | #define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>3) | |
51 | #ifndef machine_to_phys_mapping | |
52 | #define machine_to_phys_mapping ((unsigned long *)HYPERVISOR_VIRT_START) | |
53 | #endif | |
54 | ||
55 | /* | |
56 | * int HYPERVISOR_set_segment_base(unsigned int which, unsigned long base) | |
57 | * @which == SEGBASE_* ; @base == 64-bit base address | |
58 | * Returns 0 on success. | |
59 | */ | |
60 | #define SEGBASE_FS 0 | |
61 | #define SEGBASE_GS_USER 1 | |
62 | #define SEGBASE_GS_KERNEL 2 | |
63 | #define SEGBASE_GS_USER_SEL 3 /* Set user %gs specified in base[15:0] */ | |
64 | ||
65 | /* | |
66 | * int HYPERVISOR_iret(void) | |
67 | * All arguments are on the kernel stack, in the following format. | |
68 | * Never returns if successful. Current kernel context is lost. | |
69 | * The saved CS is mapped as follows: | |
70 | * RING0 -> RING3 kernel mode. | |
71 | * RING1 -> RING3 kernel mode. | |
72 | * RING2 -> RING3 kernel mode. | |
73 | * RING3 -> RING3 user mode. | |
74 | * However RING0 indicates that the guest kernel should return to iteself | |
75 | * directly with | |
76 | * orb $3,1*8(%rsp) | |
77 | * iretq | |
78 | * If flags contains VGCF_in_syscall: | |
79 | * Restore RAX, RIP, RFLAGS, RSP. | |
80 | * Discard R11, RCX, CS, SS. | |
81 | * Otherwise: | |
82 | * Restore RAX, R11, RCX, CS:RIP, RFLAGS, SS:RSP. | |
83 | * All other registers are saved on hypercall entry and restored to user. | |
84 | */ | |
85 | /* Guest exited in SYSCALL context? Return to guest with SYSRET? */ | |
86 | #define _VGCF_in_syscall 8 | |
87 | #define VGCF_in_syscall (1<<_VGCF_in_syscall) | |
88 | #define VGCF_IN_SYSCALL VGCF_in_syscall | |
89 | ||
90 | #ifndef __ASSEMBLY__ | |
91 | ||
92 | struct iret_context { | |
93 | /* Top of stack (%rsp at point of hypercall). */ | |
94 | uint64_t rax, r11, rcx, flags, rip, cs, rflags, rsp, ss; | |
95 | /* Bottom of iret stack frame. */ | |
96 | }; | |
97 | ||
98 | #if defined(__GNUC__) && !defined(__STRICT_ANSI__) | |
99 | /* Anonymous union includes both 32- and 64-bit names (e.g., eax/rax). */ | |
100 | #define __DECL_REG(name) union { \ | |
101 | uint64_t r ## name, e ## name; \ | |
102 | uint32_t _e ## name; \ | |
103 | } | |
104 | #else | |
105 | /* Non-gcc sources must always use the proper 64-bit name (e.g., rax). */ | |
106 | #define __DECL_REG(name) uint64_t r ## name | |
107 | #endif | |
108 | ||
109 | struct cpu_user_regs { | |
110 | uint64_t r15; | |
111 | uint64_t r14; | |
112 | uint64_t r13; | |
113 | uint64_t r12; | |
114 | __DECL_REG(bp); | |
115 | __DECL_REG(bx); | |
116 | uint64_t r11; | |
117 | uint64_t r10; | |
118 | uint64_t r9; | |
119 | uint64_t r8; | |
120 | __DECL_REG(ax); | |
121 | __DECL_REG(cx); | |
122 | __DECL_REG(dx); | |
123 | __DECL_REG(si); | |
124 | __DECL_REG(di); | |
125 | uint32_t error_code; /* private */ | |
126 | uint32_t entry_vector; /* private */ | |
127 | __DECL_REG(ip); | |
128 | uint16_t cs, _pad0[1]; | |
129 | uint8_t saved_upcall_mask; | |
130 | uint8_t _pad1[3]; | |
131 | __DECL_REG(flags); /* rflags.IF == !saved_upcall_mask */ | |
132 | __DECL_REG(sp); | |
133 | uint16_t ss, _pad2[3]; | |
134 | uint16_t es, _pad3[3]; | |
135 | uint16_t ds, _pad4[3]; | |
136 | uint16_t fs, _pad5[3]; /* Non-zero => takes precedence over fs_base. */ | |
137 | uint16_t gs, _pad6[3]; /* Non-zero => takes precedence over gs_base_usr. */ | |
138 | }; | |
139 | DEFINE_GUEST_HANDLE_STRUCT(cpu_user_regs); | |
140 | ||
141 | #undef __DECL_REG | |
142 | ||
143 | #define xen_pfn_to_cr3(pfn) ((unsigned long)(pfn) << 12) | |
144 | #define xen_cr3_to_pfn(cr3) ((unsigned long)(cr3) >> 12) | |
145 | ||
146 | struct arch_vcpu_info { | |
147 | unsigned long cr2; | |
148 | unsigned long pad; /* sizeof(vcpu_info_t) == 64 */ | |
149 | }; | |
150 | ||
151 | typedef unsigned long xen_callback_t; | |
152 | ||
153 | #define XEN_CALLBACK(__cs, __rip) \ | |
154 | ((unsigned long)(__rip)) | |
155 | ||
156 | #endif /* !__ASSEMBLY__ */ | |
157 | ||
158 | ||
1965aae3 | 159 | #endif /* _ASM_X86_XEN__INTERFACE_64_H */ |