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