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 2
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 KVM_EXIT_IRQ_WINDOW_OPEN = 7,
49 KVM_EXIT_SHUTDOWN = 8,
50};
51
52/* for KVM_RUN */
53struct kvm_run {
54 /* in */
55 __u32 vcpu;
56 __u32 emulated; /* skip current instruction */
57 __u32 mmio_completed; /* mmio request completed */
58 __u8 request_interrupt_window;
59 __u8 padding1[3];
60
61 /* out */
62 __u32 exit_type;
63 __u32 exit_reason;
64 __u32 instruction_length;
65 __u8 ready_for_interrupt_injection;
66 __u8 if_flag;
67 __u16 padding2;
68 __u64 cr8;
69 __u64 apic_base;
70
71 union {
72 /* KVM_EXIT_UNKNOWN */
73 struct {
74 __u32 hardware_exit_reason;
75 } hw;
76 /* KVM_EXIT_EXCEPTION */
77 struct {
78 __u32 exception;
79 __u32 error_code;
80 } ex;
81 /* KVM_EXIT_IO */
82 struct {
83#define KVM_EXIT_IO_IN 0
84#define KVM_EXIT_IO_OUT 1
85 __u8 direction;
86 __u8 size; /* bytes */
87 __u8 string;
88 __u8 string_down;
89 __u8 rep;
90 __u8 pad;
91 __u16 port;
92 __u64 count;
93 union {
94 __u64 address;
95 __u32 value;
96 };
97 } io;
98 struct {
99 } debug;
100 /* KVM_EXIT_MMIO */
101 struct {
102 __u64 phys_addr;
103 __u8 data[8];
104 __u32 len;
105 __u8 is_write;
106 } mmio;
107 };
108};
109
110/* for KVM_GET_REGS and KVM_SET_REGS */
111struct kvm_regs {
112 /* in */
113 __u32 vcpu;
114 __u32 padding;
115
116 /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
117 __u64 rax, rbx, rcx, rdx;
118 __u64 rsi, rdi, rsp, rbp;
119 __u64 r8, r9, r10, r11;
120 __u64 r12, r13, r14, r15;
121 __u64 rip, rflags;
122};
123
124struct kvm_segment {
125 __u64 base;
126 __u32 limit;
127 __u16 selector;
128 __u8 type;
129 __u8 present, dpl, db, s, l, g, avl;
130 __u8 unusable;
131 __u8 padding;
132};
133
134struct kvm_dtable {
135 __u64 base;
136 __u16 limit;
137 __u16 padding[3];
138};
139
140/* for KVM_GET_SREGS and KVM_SET_SREGS */
141struct kvm_sregs {
142 /* in */
143 __u32 vcpu;
144 __u32 padding;
145
146 /* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */
147 struct kvm_segment cs, ds, es, fs, gs, ss;
148 struct kvm_segment tr, ldt;
149 struct kvm_dtable gdt, idt;
150 __u64 cr0, cr2, cr3, cr4, cr8;
151 __u64 efer;
152 __u64 apic_base;
153 __u64 interrupt_bitmap[KVM_IRQ_BITMAP_SIZE(__u64)];
154};
155
156struct kvm_msr_entry {
157 __u32 index;
158 __u32 reserved;
159 __u64 data;
160};
161
162/* for KVM_GET_MSRS and KVM_SET_MSRS */
163struct kvm_msrs {
164 __u32 vcpu;
165 __u32 nmsrs; /* number of msrs in entries */
166
167 struct kvm_msr_entry entries[0];
168};
169
170/* for KVM_GET_MSR_INDEX_LIST */
171struct kvm_msr_list {
172 __u32 nmsrs; /* number of msrs in entries */
173 __u32 indices[0];
174};
175
176/* for KVM_TRANSLATE */
177struct kvm_translation {
178 /* in */
179 __u64 linear_address;
180 __u32 vcpu;
181 __u32 padding;
182
183 /* out */
184 __u64 physical_address;
185 __u8 valid;
186 __u8 writeable;
187 __u8 usermode;
188};
189
190/* for KVM_INTERRUPT */
191struct kvm_interrupt {
192 /* in */
193 __u32 vcpu;
194 __u32 irq;
195};
196
197struct kvm_breakpoint {
198 __u32 enabled;
199 __u32 padding;
200 __u64 address;
201};
202
203/* for KVM_DEBUG_GUEST */
204struct kvm_debug_guest {
205 /* int */
206 __u32 vcpu;
207 __u32 enabled;
208 struct kvm_breakpoint breakpoints[4];
209 __u32 singlestep;
210};
211
212/* for KVM_GET_DIRTY_LOG */
213struct kvm_dirty_log {
214 __u32 slot;
215 __u32 padding;
216 union {
217 void __user *dirty_bitmap; /* one bit per page */
218 __u64 padding;
219 };
220};
221
222#define KVMIO 0xAE
223
224#define KVM_GET_API_VERSION _IO(KVMIO, 1)
225#define KVM_RUN _IOWR(KVMIO, 2, struct kvm_run)
226#define KVM_GET_REGS _IOWR(KVMIO, 3, struct kvm_regs)
227#define KVM_SET_REGS _IOW(KVMIO, 4, struct kvm_regs)
228#define KVM_GET_SREGS _IOWR(KVMIO, 5, struct kvm_sregs)
229#define KVM_SET_SREGS _IOW(KVMIO, 6, struct kvm_sregs)
230#define KVM_TRANSLATE _IOWR(KVMIO, 7, struct kvm_translation)
231#define KVM_INTERRUPT _IOW(KVMIO, 8, struct kvm_interrupt)
232#define KVM_DEBUG_GUEST _IOW(KVMIO, 9, struct kvm_debug_guest)
233#define KVM_SET_MEMORY_REGION _IOW(KVMIO, 10, struct kvm_memory_region)
234#define KVM_CREATE_VCPU _IOW(KVMIO, 11, int /* vcpu_slot */)
235#define KVM_GET_DIRTY_LOG _IOW(KVMIO, 12, struct kvm_dirty_log)
236#define KVM_GET_MSRS _IOWR(KVMIO, 13, struct kvm_msrs)
237#define KVM_SET_MSRS _IOWR(KVMIO, 14, struct kvm_msrs)
238#define KVM_GET_MSR_INDEX_LIST _IOWR(KVMIO, 15, struct kvm_msr_list)
239
240#endif