Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef __LINUX_KVM_H
2#define __LINUX_KVM_H
3
4/*
5 * Userspace interface for /dev/kvm - kernel based virtual machine
6 *
7 * Note: this interface is considered experimental and may change without
8 * notice.
9 */
10
11#include <asm/types.h>
12#include <linux/ioctl.h>
13
14#define KVM_API_VERSION 1
15
16/*
17 * Architectural interrupt line count, and the size of the bitmap needed
18 * to hold them.
19 */
20#define KVM_NR_INTERRUPTS 256
21#define KVM_IRQ_BITMAP_SIZE_BYTES ((KVM_NR_INTERRUPTS + 7) / 8)
22#define KVM_IRQ_BITMAP_SIZE(type) (KVM_IRQ_BITMAP_SIZE_BYTES / sizeof(type))
23
24
25/* for KVM_CREATE_MEMORY_REGION */
26struct kvm_memory_region {
27 __u32 slot;
28 __u32 flags;
29 __u64 guest_phys_addr;
30 __u64 memory_size; /* bytes */
31};
32
33/* for kvm_memory_region::flags */
34#define KVM_MEM_LOG_DIRTY_PAGES 1UL
35
36
37#define KVM_EXIT_TYPE_FAIL_ENTRY 1
38#define KVM_EXIT_TYPE_VM_EXIT 2
39
40enum kvm_exit_reason {
41 KVM_EXIT_UNKNOWN = 0,
42 KVM_EXIT_EXCEPTION = 1,
43 KVM_EXIT_IO = 2,
44 KVM_EXIT_CPUID = 3,
45 KVM_EXIT_DEBUG = 4,
46 KVM_EXIT_HLT = 5,
47 KVM_EXIT_MMIO = 6,
48};
49
50/* for KVM_RUN */
51struct kvm_run {
52 /* in */
53 __u32 vcpu;
54 __u32 emulated; /* skip current instruction */
55 __u32 mmio_completed; /* mmio request completed */
56
57 /* out */
58 __u32 exit_type;
59 __u32 exit_reason;
60 __u32 instruction_length;
61 union {
62 /* KVM_EXIT_UNKNOWN */
63 struct {
64 __u32 hardware_exit_reason;
65 } hw;
66 /* KVM_EXIT_EXCEPTION */
67 struct {
68 __u32 exception;
69 __u32 error_code;
70 } ex;
71 /* KVM_EXIT_IO */
72 struct {
73#define KVM_EXIT_IO_IN 0
74#define KVM_EXIT_IO_OUT 1
75 __u8 direction;
76 __u8 size; /* bytes */
77 __u8 string;
78 __u8 string_down;
79 __u8 rep;
80 __u8 pad;
81 __u16 port;
82 __u64 count;
83 union {
84 __u64 address;
85 __u32 value;
86 };
87 } io;
88 struct {
89 } debug;
90 /* KVM_EXIT_MMIO */
91 struct {
92 __u64 phys_addr;
93 __u8 data[8];
94 __u32 len;
95 __u8 is_write;
96 } mmio;
97 };
98};
99
100/* for KVM_GET_REGS and KVM_SET_REGS */
101struct kvm_regs {
102 /* in */
103 __u32 vcpu;
104 __u32 padding;
105
106 /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
107 __u64 rax, rbx, rcx, rdx;
108 __u64 rsi, rdi, rsp, rbp;
109 __u64 r8, r9, r10, r11;
110 __u64 r12, r13, r14, r15;
111 __u64 rip, rflags;
112};
113
114struct kvm_segment {
115 __u64 base;
116 __u32 limit;
117 __u16 selector;
118 __u8 type;
119 __u8 present, dpl, db, s, l, g, avl;
120 __u8 unusable;
121 __u8 padding;
122};
123
124struct kvm_dtable {
125 __u64 base;
126 __u16 limit;
127 __u16 padding[3];
128};
129
130/* for KVM_GET_SREGS and KVM_SET_SREGS */
131struct kvm_sregs {
132 /* in */
133 __u32 vcpu;
134 __u32 padding;
135
136 /* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */
137 struct kvm_segment cs, ds, es, fs, gs, ss;
138 struct kvm_segment tr, ldt;
139 struct kvm_dtable gdt, idt;
140 __u64 cr0, cr2, cr3, cr4, cr8;
141 __u64 efer;
142 __u64 apic_base;
143 __u64 interrupt_bitmap[KVM_IRQ_BITMAP_SIZE(__u64)];
144};
145
146struct kvm_msr_entry {
147 __u32 index;
148 __u32 reserved;
149 __u64 data;
150};
151
152/* for KVM_GET_MSRS and KVM_SET_MSRS */
153struct kvm_msrs {
154 __u32 vcpu;
155 __u32 nmsrs; /* number of msrs in entries */
156
157 struct kvm_msr_entry entries[0];
158};
159
160/* for KVM_GET_MSR_INDEX_LIST */
161struct kvm_msr_list {
162 __u32 nmsrs; /* number of msrs in entries */
163 __u32 indices[0];
164};
165
166/* for KVM_TRANSLATE */
167struct kvm_translation {
168 /* in */
169 __u64 linear_address;
170 __u32 vcpu;
171 __u32 padding;
172
173 /* out */
174 __u64 physical_address;
175 __u8 valid;
176 __u8 writeable;
177 __u8 usermode;
178};
179
180/* for KVM_INTERRUPT */
181struct kvm_interrupt {
182 /* in */
183 __u32 vcpu;
184 __u32 irq;
185};
186
187struct kvm_breakpoint {
188 __u32 enabled;
189 __u32 padding;
190 __u64 address;
191};
192
193/* for KVM_DEBUG_GUEST */
194struct kvm_debug_guest {
195 /* int */
196 __u32 vcpu;
197 __u32 enabled;
198 struct kvm_breakpoint breakpoints[4];
199 __u32 singlestep;
200};
201
202/* for KVM_GET_DIRTY_LOG */
203struct kvm_dirty_log {
204 __u32 slot;
205 __u32 padding;
206 union {
207 void __user *dirty_bitmap; /* one bit per page */
208 __u64 padding;
209 };
210};
211
212#define KVMIO 0xAE
213
214#define KVM_GET_API_VERSION _IO(KVMIO, 1)
215#define KVM_RUN _IOWR(KVMIO, 2, struct kvm_run)
216#define KVM_GET_REGS _IOWR(KVMIO, 3, struct kvm_regs)
217#define KVM_SET_REGS _IOW(KVMIO, 4, struct kvm_regs)
218#define KVM_GET_SREGS _IOWR(KVMIO, 5, struct kvm_sregs)
219#define KVM_SET_SREGS _IOW(KVMIO, 6, struct kvm_sregs)
220#define KVM_TRANSLATE _IOWR(KVMIO, 7, struct kvm_translation)
221#define KVM_INTERRUPT _IOW(KVMIO, 8, struct kvm_interrupt)
222#define KVM_DEBUG_GUEST _IOW(KVMIO, 9, struct kvm_debug_guest)
223#define KVM_SET_MEMORY_REGION _IOW(KVMIO, 10, struct kvm_memory_region)
224#define KVM_CREATE_VCPU _IOW(KVMIO, 11, int /* vcpu_slot */)
225#define KVM_GET_DIRTY_LOG _IOW(KVMIO, 12, struct kvm_dirty_log)
226#define KVM_GET_MSRS _IOWR(KVMIO, 13, struct kvm_msrs)
227#define KVM_SET_MSRS _IOWR(KVMIO, 14, struct kvm_msrs)
228#define KVM_GET_MSR_INDEX_LIST _IOWR(KVMIO, 15, struct kvm_msr_list)
229
230#endif