summaryrefslogtreecommitdiff
path: root/include/sysemu/kvm.h
blob: 7741f91f9cd67b84587b3196ec75ccbbd2911fcd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
/*
 * QEMU KVM support
 *
 * Copyright IBM, Corp. 2008
 *
 * Authors:
 *  Anthony Liguori   <aliguori@us.ibm.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 *
 */

#ifndef QEMU_KVM_H
#define QEMU_KVM_H

#include <errno.h>
#include "config-host.h"
#include "qemu/queue.h"
#include "qom/cpu.h"
#include "exec/memattrs.h"
#include "hw/irq.h"

#ifdef CONFIG_KVM
#include <linux/kvm.h>
#include <linux/kvm_para.h>
#else
/* These constants must never be used at runtime if kvm_enabled() is false.
 * They exist so we don't need #ifdefs around KVM-specific code that already
 * checks kvm_enabled() properly.
 */
#define KVM_CPUID_SIGNATURE      0
#define KVM_CPUID_FEATURES       0
#define KVM_FEATURE_CLOCKSOURCE  0
#define KVM_FEATURE_NOP_IO_DELAY 0
#define KVM_FEATURE_MMU_OP       0
#define KVM_FEATURE_CLOCKSOURCE2 0
#define KVM_FEATURE_ASYNC_PF     0
#define KVM_FEATURE_STEAL_TIME   0
#define KVM_FEATURE_PV_EOI       0
#define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 0
#endif

extern bool kvm_allowed;
extern bool kvm_kernel_irqchip;
extern bool kvm_split_irqchip;
extern bool kvm_async_interrupts_allowed;
extern bool kvm_halt_in_kernel_allowed;
extern bool kvm_eventfds_allowed;
extern bool kvm_irqfds_allowed;
extern bool kvm_resamplefds_allowed;
extern bool kvm_msi_via_irqfd_allowed;
extern bool kvm_gsi_routing_allowed;
extern bool kvm_gsi_direct_mapping;
extern bool kvm_readonly_mem_allowed;
extern bool kvm_direct_msi_allowed;
extern bool kvm_ioeventfd_any_length_allowed;

#if defined CONFIG_KVM || !defined NEED_CPU_H
#define kvm_enabled()           (kvm_allowed)
/**
 * kvm_irqchip_in_kernel:
 *
 * Returns: true if the user asked us to create an in-kernel
 * irqchip via the "kernel_irqchip=on" machine option.
 * What this actually means is architecture and machine model
 * specific: on PC, for instance, it means that the LAPIC,
 * IOAPIC and PIT are all in kernel. This function should never
 * be used from generic target-independent code: use one of the
 * following functions or some other specific check instead.
 */
#define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)

/**
 * kvm_irqchip_is_split:
 *
 * Returns: true if the user asked us to split the irqchip
 * implementation between user and kernel space. The details are
 * architecture and machine specific. On PC, it means that the PIC,
 * IOAPIC, and PIT are in user space while the LAPIC is in the kernel.
 */
#define kvm_irqchip_is_split() (kvm_split_irqchip)

/**
 * kvm_async_interrupts_enabled:
 *
 * Returns: true if we can deliver interrupts to KVM
 * asynchronously (ie by ioctl from any thread at any time)
 * rather than having to do interrupt delivery synchronously
 * (where the vcpu must be stopped at a suitable point first).
 */
#define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)

/**
 * kvm_halt_in_kernel
 *
 * Returns: true if halted cpus should still get a KVM_RUN ioctl to run
 * inside of kernel space. This only works if MP state is implemented.
 */
#define kvm_halt_in_kernel() (kvm_halt_in_kernel_allowed)

/**
 * kvm_eventfds_enabled:
 *
 * Returns: true if we can use eventfds to receive notifications
 * from a KVM CPU (ie the kernel supports eventds and we are running
 * with a configuration where it is meaningful to use them).
 */
#define kvm_eventfds_enabled() (kvm_eventfds_allowed)

/**
 * kvm_irqfds_enabled:
 *
 * Returns: true if we can use irqfds to inject interrupts into
 * a KVM CPU (ie the kernel supports irqfds and we are running
 * with a configuration where it is meaningful to use them).
 */
#define kvm_irqfds_enabled() (kvm_irqfds_allowed)

/**
 * kvm_resamplefds_enabled:
 *
 * Returns: true if we can use resamplefds to inject interrupts into
 * a KVM CPU (ie the kernel supports resamplefds and we are running
 * with a configuration where it is meaningful to use them).
 */
#define kvm_resamplefds_enabled() (kvm_resamplefds_allowed)

/**
 * kvm_msi_via_irqfd_enabled:
 *
 * Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
 * to a KVM CPU via an irqfd. This requires that the kernel supports
 * this and that we're running in a configuration that permits it.
 */
#define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)

/**
 * kvm_gsi_routing_enabled:
 *
 * Returns: true if GSI routing is enabled (ie the kernel supports
 * it and we're running in a configuration that permits it).
 */
#define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)

/**
 * kvm_gsi_direct_mapping:
 *
 * Returns: true if GSI direct mapping is enabled.
 */
#define kvm_gsi_direct_mapping() (kvm_gsi_direct_mapping)

/**
 * kvm_readonly_mem_enabled:
 *
 * Returns: true if KVM readonly memory is enabled (ie the kernel
 * supports it and we're running in a configuration that permits it).
 */
#define kvm_readonly_mem_enabled() (kvm_readonly_mem_allowed)

/**
 * kvm_direct_msi_enabled:
 *
 * Returns: true if KVM allows direct MSI injection.
 */
#define kvm_direct_msi_enabled() (kvm_direct_msi_allowed)

/**
 * kvm_ioeventfd_any_length_enabled:
 * Returns: true if KVM allows any length io eventfd.
 */
#define kvm_ioeventfd_any_length_enabled() (kvm_ioeventfd_any_length_allowed)

#else
#define kvm_enabled()           (0)
#define kvm_irqchip_in_kernel() (false)
#define kvm_irqchip_is_split() (false)
#define kvm_async_interrupts_enabled() (false)
#define kvm_halt_in_kernel() (false)
#define kvm_eventfds_enabled() (false)
#define kvm_irqfds_enabled() (false)
#define kvm_resamplefds_enabled() (false)
#define kvm_msi_via_irqfd_enabled() (false)
#define kvm_gsi_routing_allowed() (false)
#define kvm_gsi_direct_mapping() (false)
#define kvm_readonly_mem_enabled() (false)
#define kvm_direct_msi_enabled() (false)
#define kvm_ioeventfd_any_length_enabled() (false)
#endif

struct kvm_run;
struct kvm_lapic_state;
struct kvm_irq_routing_entry;

typedef struct KVMCapabilityInfo {
    const char *name;
    int value;
} KVMCapabilityInfo;

#define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
#define KVM_CAP_LAST_INFO { NULL, 0 }

struct KVMState;
typedef struct KVMState KVMState;
extern KVMState *kvm_state;

/* external API */

bool kvm_has_free_slot(MachineState *ms);
int kvm_has_sync_mmu(void);
int kvm_has_vcpu_events(void);
int kvm_has_robust_singlestep(void);
int kvm_has_debugregs(void);
int kvm_has_pit_state2(void);
int kvm_has_many_ioeventfds(void);
int kvm_has_gsi_routing(void);
int kvm_has_intx_set_mask(void);

int kvm_init_vcpu(CPUState *cpu);
int kvm_cpu_exec(CPUState *cpu);

#ifdef NEED_CPU_H

void kvm_setup_guest_memory(void *start, size_t size);
void kvm_flush_coalesced_mmio_buffer(void);

int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
                          target_ulong len, int type);
int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
                          target_ulong len, int type);
void kvm_remove_all_breakpoints(CPUState *cpu);
int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap);
#ifndef _WIN32
int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset);
#endif

int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
int kvm_on_sigbus(int code, void *addr);

/* interface with exec.c */

void phys_mem_set_alloc(void *(*alloc)(size_t, uint64_t *align));

/* internal API */

int kvm_ioctl(KVMState *s, int type, ...);

int kvm_vm_ioctl(KVMState *s, int type, ...);

int kvm_vcpu_ioctl(CPUState *cpu, int type, ...);

/**
 * kvm_device_ioctl - call an ioctl on a kvm device
 * @fd: The KVM device file descriptor as returned from KVM_CREATE_DEVICE
 * @type: The device-ctrl ioctl number
 *
 * Returns: -errno on error, nonnegative on success
 */
int kvm_device_ioctl(int fd, int type, ...);

/**
 * kvm_vm_check_attr - check for existence of a specific vm attribute
 * @s: The KVMState pointer
 * @group: the group
 * @attr: the attribute of that group to query for
 *
 * Returns: 1 if the attribute exists
 *          0 if the attribute either does not exist or if the vm device
 *            interface is unavailable
 */
int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr);

/**
 * kvm_device_check_attr - check for existence of a specific device attribute
 * @fd: The device file descriptor
 * @group: the group
 * @attr: the attribute of that group to query for
 *
 * Returns: 1 if the attribute exists
 *          0 if the attribute either does not exist or if the vm device
 *            interface is unavailable
 */
int kvm_device_check_attr(int fd, uint32_t group, uint64_t attr);

/**
 * kvm_device_access - set or get value of a specific vm attribute
 * @fd: The device file descriptor
 * @group: the group
 * @attr: the attribute of that group to set or get
 * @val: pointer to a storage area for the value
 * @write: true for set and false for get operation
 *
 * This function is not allowed to fail. Use kvm_device_check_attr()
 * in order to check for the availability of optional attributes.
 */
void kvm_device_access(int fd, int group, uint64_t attr,
                       void *val, bool write);

/**
 * kvm_create_device - create a KVM device for the device control API
 * @KVMState: The KVMState pointer
 * @type: The KVM device type (see Documentation/virtual/kvm/devices in the
 *        kernel source)
 * @test: If true, only test if device can be created, but don't actually
 *        create the device.
 *
 * Returns: -errno on error, nonnegative on success: @test ? 0 : device fd;
 */
int kvm_create_device(KVMState *s, uint64_t type, bool test);


/* Arch specific hooks */

extern const KVMCapabilityInfo kvm_arch_required_capabilities[];

void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run);
MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run);

int kvm_arch_handle_exit(CPUState *cpu, struct kvm_run *run);

int kvm_arch_handle_ioapic_eoi(CPUState *cpu, struct kvm_run *run);

int kvm_arch_process_async_events(CPUState *cpu);

int kvm_arch_get_registers(CPUState *cpu);

/* state subset only touched by the VCPU itself during runtime */
#define KVM_PUT_RUNTIME_STATE   1
/* state subset modified during VCPU reset */
#define KVM_PUT_RESET_STATE     2
/* full state set, modified during initialization or on vmload */
#define KVM_PUT_FULL_STATE      3

int kvm_arch_put_registers(CPUState *cpu, int level);

int kvm_arch_init(MachineState *ms, KVMState *s);

int kvm_arch_init_vcpu(CPUState *cpu);

/* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */
unsigned long kvm_arch_vcpu_id(CPUState *cpu);

int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
int kvm_arch_on_sigbus(int code, void *addr);

void kvm_arch_init_irq_routing(KVMState *s);

int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
                             uint64_t address, uint32_t data, PCIDevice *dev);

int kvm_arch_msi_data_to_gsi(uint32_t data);

int kvm_set_irq(KVMState *s, int irq, int level);
int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);

void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
void kvm_irqchip_commit_routes(KVMState *s);

void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);

struct kvm_guest_debug;
struct kvm_debug_exit_arch;

struct kvm_sw_breakpoint {
    target_ulong pc;
    target_ulong saved_insn;
    int use_count;
    QTAILQ_ENTRY(kvm_sw_breakpoint) entry;
};

QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);

struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
                                                 target_ulong pc);

int kvm_sw_breakpoints_active(CPUState *cpu);

int kvm_arch_insert_sw_breakpoint(CPUState *cpu,
                                  struct kvm_sw_breakpoint *bp);
int kvm_arch_remove_sw_breakpoint(CPUState *cpu,
                                  struct kvm_sw_breakpoint *bp);
int kvm_arch_insert_hw_breakpoint(target_ulong addr,
                                  target_ulong len, int type);
int kvm_arch_remove_hw_breakpoint(target_ulong addr,
                                  target_ulong len, int type);
void kvm_arch_remove_all_hw_breakpoints(void);

void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg);

bool kvm_arch_stop_on_emulation_error(CPUState *cpu);

int kvm_check_extension(KVMState *s, unsigned int extension);

int kvm_vm_check_extension(KVMState *s, unsigned int extension);

#define kvm_vm_enable_cap(s, capability, cap_flags, ...)             \
    ({                                                               \
        struct kvm_enable_cap cap = {                                \
            .cap = capability,                                       \
            .flags = cap_flags,                                      \
        };                                                           \
        uint64_t args_tmp[] = { __VA_ARGS__ };                       \
        int i;                                                       \
        for (i = 0; i < (int)ARRAY_SIZE(args_tmp) &&                 \
                     i < ARRAY_SIZE(cap.args); i++) {                \
            cap.args[i] = args_tmp[i];                               \
        }                                                            \
        kvm_vm_ioctl(s, KVM_ENABLE_CAP, &cap);                       \
    })

#define kvm_vcpu_enable_cap(cpu, capability, cap_flags, ...)         \
    ({                                                               \
        struct kvm_enable_cap cap = {                                \
            .cap = capability,                                       \
            .flags = cap_flags,                                      \
        };                                                           \
        uint64_t args_tmp[] = { __VA_ARGS__ };                       \
        int i;                                                       \
        for (i = 0; i < (int)ARRAY_SIZE(args_tmp) &&                 \
                     i < ARRAY_SIZE(cap.args); i++) {                \
            cap.args[i] = args_tmp[i];                               \
        }                                                            \
        kvm_vcpu_ioctl(cpu, KVM_ENABLE_CAP, &cap);                   \
    })

uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
                                      uint32_t index, int reg);

void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len);

#if !defined(CONFIG_USER_ONLY)
int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
                                       hwaddr *phys_addr);
#endif

#endif /* NEED_CPU_H */

void kvm_cpu_synchronize_state(CPUState *cpu);
void kvm_cpu_synchronize_post_reset(CPUState *cpu);
void kvm_cpu_synchronize_post_init(CPUState *cpu);

/* generic hooks - to be moved/refactored once there are more users */

static inline void cpu_synchronize_state(CPUState *cpu)
{
    if (kvm_enabled()) {
        kvm_cpu_synchronize_state(cpu);
    }
}

static inline void cpu_synchronize_post_reset(CPUState *cpu)
{
    if (kvm_enabled()) {
        kvm_cpu_synchronize_post_reset(cpu);
    }
}

static inline void cpu_synchronize_post_init(CPUState *cpu)
{
    if (kvm_enabled()) {
        kvm_cpu_synchronize_post_init(cpu);
    }
}

int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg, PCIDevice *dev);
int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
                                 PCIDevice *dev);
void kvm_irqchip_release_virq(KVMState *s, int virq);

int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter);
int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint);

int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
                                       EventNotifier *rn, int virq);
int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
                                          int virq);
int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
                                   EventNotifier *rn, qemu_irq irq);
int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n,
                                      qemu_irq irq);
void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi);
void kvm_pc_gsi_handler(void *opaque, int n, int level);
void kvm_pc_setup_irq_routing(bool pci_enabled);
void kvm_init_irq_routing(KVMState *s);

/**
 * kvm_arch_irqchip_create:
 * @KVMState: The KVMState pointer
 * @MachineState: The MachineState pointer
 *
 * Allow architectures to create an in-kernel irq chip themselves.
 *
 * Returns: < 0: error
 *            0: irq chip was not created
 *          > 0: irq chip was created
 */
int kvm_arch_irqchip_create(MachineState *ms, KVMState *s);

/**
 * kvm_set_one_reg - set a register value in KVM via KVM_SET_ONE_REG ioctl
 * @id: The register ID
 * @source: The pointer to the value to be set. It must point to a variable
 *          of the correct type/size for the register being accessed.
 *
 * Returns: 0 on success, or a negative errno on failure.
 */
int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source);

/**
 * kvm_get_one_reg - get a register value from KVM via KVM_GET_ONE_REG ioctl
 * @id: The register ID
 * @target: The pointer where the value is to be stored. It must point to a
 *          variable of the correct type/size for the register being accessed.
 *
 * Returns: 0 on success, or a negative errno on failure.
 */
int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target);
#endif