5 * Userspace interface for /dev/kvm - kernel based virtual machine
7 * Note: you must update KVM_API_VERSION if you change this interface.
10 #include <asm/types.h>
11 #include <linux/ioctl.h>
13 #define KVM_API_VERSION 12
15 /* Architectural interrupt line count. */
16 #define KVM_NR_INTERRUPTS 256
18 /* for KVM_CREATE_MEMORY_REGION */
19 struct kvm_memory_region {
22 __u64 guest_phys_addr;
23 __u64 memory_size; /* bytes */
26 /* for kvm_memory_region::flags */
27 #define KVM_MEM_LOG_DIRTY_PAGES 1UL
29 struct kvm_memory_alias {
30 __u32 slot; /* this has a different namespace than memory slots */
32 __u64 guest_phys_addr;
34 __u64 target_phys_addr;
37 /* for KVM_IRQ_LINE */
38 struct kvm_irq_level {
40 * ACPI gsi notion of irq.
41 * For IA-64 (APIC model) IOAPIC0: irq 0-23; IOAPIC1: irq 24-47..
42 * For X86 (standard AT mode) PIC0/1: irq 0-15. IOAPIC0: 0-23..
48 /* for KVM_GET_IRQCHIP / KVM_SET_IRQCHIP */
49 struct kvm_pic_state {
50 __u8 last_irr; /* edge detection */
51 __u8 irr; /* interrupt request register */
52 __u8 imr; /* interrupt mask register */
53 __u8 isr; /* interrupt service register */
54 __u8 priority_add; /* highest irq priority */
61 __u8 rotate_on_auto_eoi;
62 __u8 special_fully_nested_mode;
63 __u8 init4; /* true if 4 byte init */
64 __u8 elcr; /* PIIX edge/trigger selection */
69 KVM_IRQCHIP_PIC_MASTER = 0,
70 KVM_IRQCHIP_PIC_SLAVE = 1,
77 char dummy[512]; /* reserving space */
78 struct kvm_pic_state pic;
82 enum kvm_exit_reason {
84 KVM_EXIT_EXCEPTION = 1,
86 KVM_EXIT_HYPERCALL = 3,
90 KVM_EXIT_IRQ_WINDOW_OPEN = 7,
91 KVM_EXIT_SHUTDOWN = 8,
92 KVM_EXIT_FAIL_ENTRY = 9,
97 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */
100 __u8 request_interrupt_window;
105 __u8 ready_for_interrupt_injection;
109 /* in (pre_kvm_run), out (post_kvm_run) */
114 /* KVM_EXIT_UNKNOWN */
116 __u64 hardware_exit_reason;
118 /* KVM_EXIT_FAIL_ENTRY */
120 __u64 hardware_entry_failure_reason;
122 /* KVM_EXIT_EXCEPTION */
129 #define KVM_EXIT_IO_IN 0
130 #define KVM_EXIT_IO_OUT 1
132 __u8 size; /* bytes */
135 __u64 data_offset; /* relative to kvm_run start */
146 /* KVM_EXIT_HYPERCALL */
154 /* Fix the size of the union. */
159 /* for KVM_GET_REGS and KVM_SET_REGS */
161 /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
162 __u64 rax, rbx, rcx, rdx;
163 __u64 rsi, rdi, rsp, rbp;
164 __u64 r8, r9, r10, r11;
165 __u64 r12, r13, r14, r15;
169 /* for KVM_GET_FPU and KVM_SET_FPU */
174 __u8 ftwx; /* in fxsave format */
189 __u8 present, dpl, db, s, l, g, avl;
200 /* for KVM_GET_SREGS and KVM_SET_SREGS */
202 /* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */
203 struct kvm_segment cs, ds, es, fs, gs, ss;
204 struct kvm_segment tr, ldt;
205 struct kvm_dtable gdt, idt;
206 __u64 cr0, cr2, cr3, cr4, cr8;
209 __u64 interrupt_bitmap[(KVM_NR_INTERRUPTS + 63) / 64];
212 struct kvm_msr_entry {
218 /* for KVM_GET_MSRS and KVM_SET_MSRS */
220 __u32 nmsrs; /* number of msrs in entries */
223 struct kvm_msr_entry entries[0];
226 /* for KVM_GET_MSR_INDEX_LIST */
227 struct kvm_msr_list {
228 __u32 nmsrs; /* number of msrs in entries */
232 /* for KVM_TRANSLATE */
233 struct kvm_translation {
235 __u64 linear_address;
238 __u64 physical_address;
245 /* for KVM_INTERRUPT */
246 struct kvm_interrupt {
251 struct kvm_breakpoint {
257 /* for KVM_DEBUG_GUEST */
258 struct kvm_debug_guest {
262 struct kvm_breakpoint breakpoints[4];
266 /* for KVM_GET_DIRTY_LOG */
267 struct kvm_dirty_log {
271 void __user *dirty_bitmap; /* one bit per page */
276 struct kvm_cpuid_entry {
285 /* for KVM_SET_CPUID */
289 struct kvm_cpuid_entry entries[0];
292 /* for KVM_SET_SIGNAL_MASK */
293 struct kvm_signal_mask {
301 * ioctls for /dev/kvm fds:
303 #define KVM_GET_API_VERSION _IO(KVMIO, 0x00)
304 #define KVM_CREATE_VM _IO(KVMIO, 0x01) /* returns a VM fd */
305 #define KVM_GET_MSR_INDEX_LIST _IOWR(KVMIO, 0x02, struct kvm_msr_list)
307 * Check if a kvm extension is available. Argument is extension number,
308 * return is 1 (yes) or 0 (no, sorry).
310 #define KVM_CHECK_EXTENSION _IO(KVMIO, 0x03)
312 * Get size for mmap(vcpu_fd)
314 #define KVM_GET_VCPU_MMAP_SIZE _IO(KVMIO, 0x04) /* in bytes */
317 * Extension capability list.
319 #define KVM_CAP_IRQCHIP 0
320 #define KVM_CAP_HLT 1
325 #define KVM_SET_MEMORY_REGION _IOW(KVMIO, 0x40, struct kvm_memory_region)
327 * KVM_CREATE_VCPU receives as a parameter the vcpu slot, and returns
330 #define KVM_CREATE_VCPU _IO(KVMIO, 0x41)
331 #define KVM_GET_DIRTY_LOG _IOW(KVMIO, 0x42, struct kvm_dirty_log)
332 #define KVM_SET_MEMORY_ALIAS _IOW(KVMIO, 0x43, struct kvm_memory_alias)
333 /* Device model IOC */
334 #define KVM_CREATE_IRQCHIP _IO(KVMIO, 0x60)
335 #define KVM_IRQ_LINE _IOW(KVMIO, 0x61, struct kvm_irq_level)
336 #define KVM_GET_IRQCHIP _IOWR(KVMIO, 0x62, struct kvm_irqchip)
337 #define KVM_SET_IRQCHIP _IOR(KVMIO, 0x63, struct kvm_irqchip)
340 * ioctls for vcpu fds
342 #define KVM_RUN _IO(KVMIO, 0x80)
343 #define KVM_GET_REGS _IOR(KVMIO, 0x81, struct kvm_regs)
344 #define KVM_SET_REGS _IOW(KVMIO, 0x82, struct kvm_regs)
345 #define KVM_GET_SREGS _IOR(KVMIO, 0x83, struct kvm_sregs)
346 #define KVM_SET_SREGS _IOW(KVMIO, 0x84, struct kvm_sregs)
347 #define KVM_TRANSLATE _IOWR(KVMIO, 0x85, struct kvm_translation)
348 #define KVM_INTERRUPT _IOW(KVMIO, 0x86, struct kvm_interrupt)
349 #define KVM_DEBUG_GUEST _IOW(KVMIO, 0x87, struct kvm_debug_guest)
350 #define KVM_GET_MSRS _IOWR(KVMIO, 0x88, struct kvm_msrs)
351 #define KVM_SET_MSRS _IOW(KVMIO, 0x89, struct kvm_msrs)
352 #define KVM_SET_CPUID _IOW(KVMIO, 0x8a, struct kvm_cpuid)
353 #define KVM_SET_SIGNAL_MASK _IOW(KVMIO, 0x8b, struct kvm_signal_mask)
354 #define KVM_GET_FPU _IOR(KVMIO, 0x8c, struct kvm_fpu)
355 #define KVM_SET_FPU _IOW(KVMIO, 0x8d, struct kvm_fpu)