5 * Userspace interface for /dev/kvm - kernel based virtual machine
7 * Note: this interface is considered experimental and may change without
11 #include <asm/types.h>
12 #include <linux/ioctl.h>
14 #define KVM_API_VERSION 9
17 * Architectural interrupt line count, and the size of the bitmap needed
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))
25 /* for KVM_CREATE_MEMORY_REGION */
26 struct kvm_memory_region {
29 __u64 guest_phys_addr;
30 __u64 memory_size; /* bytes */
33 /* for kvm_memory_region::flags */
34 #define KVM_MEM_LOG_DIRTY_PAGES 1UL
37 enum kvm_exit_reason {
39 KVM_EXIT_EXCEPTION = 1,
41 KVM_EXIT_HYPERCALL = 3,
45 KVM_EXIT_IRQ_WINDOW_OPEN = 7,
46 KVM_EXIT_SHUTDOWN = 8,
47 KVM_EXIT_FAIL_ENTRY = 9,
51 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */
54 __u32 io_completed; /* mmio/pio request completed */
55 __u8 request_interrupt_window;
60 __u32 instruction_length;
61 __u8 ready_for_interrupt_injection;
65 /* in (pre_kvm_run), out (post_kvm_run) */
70 /* KVM_EXIT_UNKNOWN */
72 __u64 hardware_exit_reason;
74 /* KVM_EXIT_FAIL_ENTRY */
76 __u64 hardware_entry_failure_reason;
78 /* KVM_EXIT_EXCEPTION */
85 #define KVM_EXIT_IO_IN 0
86 #define KVM_EXIT_IO_OUT 1
88 __u8 size; /* bytes */
91 __u64 data_offset; /* relative to kvm_run start */
102 /* KVM_EXIT_HYPERCALL */
112 /* for KVM_GET_REGS and KVM_SET_REGS */
114 /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
115 __u64 rax, rbx, rcx, rdx;
116 __u64 rsi, rdi, rsp, rbp;
117 __u64 r8, r9, r10, r11;
118 __u64 r12, r13, r14, r15;
127 __u8 present, dpl, db, s, l, g, avl;
138 /* for KVM_GET_SREGS and KVM_SET_SREGS */
140 /* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */
141 struct kvm_segment cs, ds, es, fs, gs, ss;
142 struct kvm_segment tr, ldt;
143 struct kvm_dtable gdt, idt;
144 __u64 cr0, cr2, cr3, cr4, cr8;
147 __u64 interrupt_bitmap[KVM_IRQ_BITMAP_SIZE(__u64)];
150 struct kvm_msr_entry {
156 /* for KVM_GET_MSRS and KVM_SET_MSRS */
158 __u32 nmsrs; /* number of msrs in entries */
161 struct kvm_msr_entry entries[0];
164 /* for KVM_GET_MSR_INDEX_LIST */
165 struct kvm_msr_list {
166 __u32 nmsrs; /* number of msrs in entries */
170 /* for KVM_TRANSLATE */
171 struct kvm_translation {
173 __u64 linear_address;
176 __u64 physical_address;
183 /* for KVM_INTERRUPT */
184 struct kvm_interrupt {
189 struct kvm_breakpoint {
195 /* for KVM_DEBUG_GUEST */
196 struct kvm_debug_guest {
200 struct kvm_breakpoint breakpoints[4];
204 /* for KVM_GET_DIRTY_LOG */
205 struct kvm_dirty_log {
209 void __user *dirty_bitmap; /* one bit per page */
214 struct kvm_cpuid_entry {
223 /* for KVM_SET_CPUID */
227 struct kvm_cpuid_entry entries[0];
230 /* for KVM_SET_SIGNAL_MASK */
231 struct kvm_signal_mask {
239 * ioctls for /dev/kvm fds:
241 #define KVM_GET_API_VERSION _IO(KVMIO, 0x00)
242 #define KVM_CREATE_VM _IO(KVMIO, 0x01) /* returns a VM fd */
243 #define KVM_GET_MSR_INDEX_LIST _IOWR(KVMIO, 0x02, struct kvm_msr_list)
245 * Check if a kvm extension is available. Argument is extension number,
246 * return is 1 (yes) or 0 (no, sorry).
248 #define KVM_CHECK_EXTENSION _IO(KVMIO, 0x03)
250 * Get size for mmap(vcpu_fd)
252 #define KVM_GET_VCPU_MMAP_SIZE _IO(KVMIO, 0x04) /* in bytes */
257 #define KVM_SET_MEMORY_REGION _IOW(KVMIO, 0x40, struct kvm_memory_region)
259 * KVM_CREATE_VCPU receives as a parameter the vcpu slot, and returns
262 #define KVM_CREATE_VCPU _IO(KVMIO, 0x41)
263 #define KVM_GET_DIRTY_LOG _IOW(KVMIO, 0x42, struct kvm_dirty_log)
266 * ioctls for vcpu fds
268 #define KVM_RUN _IO(KVMIO, 0x80)
269 #define KVM_GET_REGS _IOR(KVMIO, 0x81, struct kvm_regs)
270 #define KVM_SET_REGS _IOW(KVMIO, 0x82, struct kvm_regs)
271 #define KVM_GET_SREGS _IOR(KVMIO, 0x83, struct kvm_sregs)
272 #define KVM_SET_SREGS _IOW(KVMIO, 0x84, struct kvm_sregs)
273 #define KVM_TRANSLATE _IOWR(KVMIO, 0x85, struct kvm_translation)
274 #define KVM_INTERRUPT _IOW(KVMIO, 0x86, struct kvm_interrupt)
275 #define KVM_DEBUG_GUEST _IOW(KVMIO, 0x87, struct kvm_debug_guest)
276 #define KVM_GET_MSRS _IOWR(KVMIO, 0x88, struct kvm_msrs)
277 #define KVM_SET_MSRS _IOW(KVMIO, 0x89, struct kvm_msrs)
278 #define KVM_SET_CPUID _IOW(KVMIO, 0x8a, struct kvm_cpuid)
279 #define KVM_SET_SIGNAL_MASK _IOW(KVMIO, 0x8b, struct kvm_signal_mask)