include/sysemu/kvm.h

   1 /*
   2  * QEMU KVM support
   3  *
   4  * Copyright IBM, Corp. 2008
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #ifndef QEMU_KVM_H
  15 #define QEMU_KVM_H
  16
  17 #include <errno.h>
  18 #include "config-host.h"
  19 #include "qemu/queue.h"
  20 #include "qom/cpu.h"
  21
  22 #ifdef CONFIG_KVM
  23 #include <linux/kvm.h>
  24 #include <linux/kvm_para.h>
  25 #else
  26 /* These constants must never be used at runtime if kvm_enabled() is false.
  27  * They exist so we don't need #ifdefs around KVM-specific code that already
  28  * checks kvm_enabled() properly.
  29  */
  30 #define KVM_CPUID_SIGNATURE      0
  31 #define KVM_CPUID_FEATURES       0
  32 #define KVM_FEATURE_CLOCKSOURCE  0
  33 #define KVM_FEATURE_NOP_IO_DELAY 0
  34 #define KVM_FEATURE_MMU_OP       0
  35 #define KVM_FEATURE_CLOCKSOURCE2 0
  36 #define KVM_FEATURE_ASYNC_PF     0
  37 #define KVM_FEATURE_STEAL_TIME   0
  38 #define KVM_FEATURE_PV_EOI       0
  39 #define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 0
  40 #endif
  41
  42 extern bool kvm_allowed;
  43 extern bool kvm_kernel_irqchip;
  44 extern bool kvm_async_interrupts_allowed;
  45 extern bool kvm_irqfds_allowed;
  46 extern bool kvm_msi_via_irqfd_allowed;
  47 extern bool kvm_gsi_routing_allowed;
  48
  49 #if defined CONFIG_KVM || !defined NEED_CPU_H
  50 #define kvm_enabled()           (kvm_allowed)
  51 /**
  52  * kvm_irqchip_in_kernel:
  53  *
  54  * Returns: true if the user asked us to create an in-kernel
  55  * irqchip via the "kernel_irqchip=on" machine option.
  56  * What this actually means is architecture and machine model
  57  * specific: on PC, for instance, it means that the LAPIC,
  58  * IOAPIC and PIT are all in kernel. This function should never
  59  * be used from generic target-independent code: use one of the
  60  * following functions or some other specific check instead.
  61  */
  62 #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
  63
  64 /**
  65  * kvm_async_interrupts_enabled:
  66  *
  67  * Returns: true if we can deliver interrupts to KVM
  68  * asynchronously (ie by ioctl from any thread at any time)
  69  * rather than having to do interrupt delivery synchronously
  70  * (where the vcpu must be stopped at a suitable point first).
  71  */
  72 #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)
  73
  74 /**
  75  * kvm_irqfds_enabled:
  76  *
  77  * Returns: true if we can use irqfds to inject interrupts into
  78  * a KVM CPU (ie the kernel supports irqfds and we are running
  79  * with a configuration where it is meaningful to use them).
  80  */
  81 #define kvm_irqfds_enabled() (kvm_irqfds_allowed)
  82
  83 /**
  84  * kvm_msi_via_irqfd_enabled:
  85  *
  86  * Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
  87  * to a KVM CPU via an irqfd. This requires that the kernel supports
  88  * this and that we're running in a configuration that permits it.
  89  */
  90 #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
  91
  92 /**
  93  * kvm_gsi_routing_enabled:
  94  *
  95  * Returns: true if GSI routing is enabled (ie the kernel supports
  96  * it and we're running in a configuration that permits it).
  97  */
  98 #define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
  99
 100 #else
 101 #define kvm_enabled()           (0)
 102 #define kvm_irqchip_in_kernel() (false)
 103 #define kvm_async_interrupts_enabled() (false)
 104 #define kvm_irqfds_enabled() (false)
 105 #define kvm_msi_via_irqfd_enabled() (false)
 106 #define kvm_gsi_routing_allowed() (false)
 107 #endif
 108
 109 struct kvm_run;
 110 struct kvm_lapic_state;
 111
 112 typedef struct KVMCapabilityInfo {
 113     const char *name;
 114     int value;
 115 } KVMCapabilityInfo;
 116
 117 #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
 118 #define KVM_CAP_LAST_INFO { NULL, 0 }
 119
 120 struct KVMState;
 121 typedef struct KVMState KVMState;
 122 extern KVMState *kvm_state;
 123
 124 /* external API */
 125
 126 int kvm_init(void);
 127
 128 int kvm_has_sync_mmu(void);
 129 int kvm_has_vcpu_events(void);
 130 int kvm_has_robust_singlestep(void);
 131 int kvm_has_debugregs(void);
 132 int kvm_has_xsave(void);
 133 int kvm_has_xcrs(void);
 134 int kvm_has_pit_state2(void);
 135 int kvm_has_many_ioeventfds(void);
 136 int kvm_has_gsi_routing(void);
 137 int kvm_has_intx_set_mask(void);
 138
 139 int kvm_init_vcpu(CPUState *cpu);
 140
 141 #ifdef NEED_CPU_H
 142 int kvm_cpu_exec(CPUArchState *env);
 143
 144 #if !defined(CONFIG_USER_ONLY)
 145 void *kvm_vmalloc(ram_addr_t size);
 146 void *kvm_arch_vmalloc(ram_addr_t size);
 147 #endif
 148
 149 void kvm_setup_guest_memory(void *start, size_t size);
 150 void kvm_flush_coalesced_mmio_buffer(void);
 151
 152 int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
 153                           target_ulong len, int type);
 154 int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
 155                           target_ulong len, int type);
 156 void kvm_remove_all_breakpoints(CPUArchState *current_env);
 157 int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap);
 158 #ifndef _WIN32
 159 int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset);
 160 #endif
 161
 162 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
 163 int kvm_on_sigbus(int code, void *addr);
 164
 165 /* internal API */
 166
 167 int kvm_ioctl(KVMState *s, int type, ...);
 168
 169 int kvm_vm_ioctl(KVMState *s, int type, ...);
 170
 171 int kvm_vcpu_ioctl(CPUState *cpu, int type, ...);
 172
 173 /* Arch specific hooks */
 174
 175 extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
 176
 177 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run);
 178 void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run);
 179
 180 int kvm_arch_handle_exit(CPUState *cpu, struct kvm_run *run);
 181
 182 int kvm_arch_process_async_events(CPUState *cpu);
 183
 184 int kvm_arch_get_registers(CPUState *cpu);
 185
 186 /* state subset only touched by the VCPU itself during runtime */
 187 #define KVM_PUT_RUNTIME_STATE   1
 188 /* state subset modified during VCPU reset */
 189 #define KVM_PUT_RESET_STATE     2
 190 /* full state set, modified during initialization or on vmload */
 191 #define KVM_PUT_FULL_STATE      3
 192
 193 int kvm_arch_put_registers(CPUState *cpu, int level);
 194
 195 int kvm_arch_init(KVMState *s);
 196
 197 int kvm_arch_init_vcpu(CPUState *cpu);
 198
 199 /* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */
 200 unsigned long kvm_arch_vcpu_id(CPUState *cpu);
 201
 202 void kvm_arch_reset_vcpu(CPUState *cpu);
 203
 204 int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
 205 int kvm_arch_on_sigbus(int code, void *addr);
 206
 207 void kvm_arch_init_irq_routing(KVMState *s);
 208
 209 int kvm_set_irq(KVMState *s, int irq, int level);
 210 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);
 211
 212 void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
 213
 214 void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
 215 void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
 216
 217 struct kvm_guest_debug;
 218 struct kvm_debug_exit_arch;
 219
 220 struct kvm_sw_breakpoint {
 221     target_ulong pc;
 222     target_ulong saved_insn;
 223     int use_count;
 224     QTAILQ_ENTRY(kvm_sw_breakpoint) entry;
 225 };
 226
 227 QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
 228
 229 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
 230                                                  target_ulong pc);
 231
 232 int kvm_sw_breakpoints_active(CPUState *cpu);
 233
 234 int kvm_arch_insert_sw_breakpoint(CPUState *current_cpu,
 235                                   struct kvm_sw_breakpoint *bp);
 236 int kvm_arch_remove_sw_breakpoint(CPUState *current_cpu,
 237                                   struct kvm_sw_breakpoint *bp);
 238 int kvm_arch_insert_hw_breakpoint(target_ulong addr,
 239                                   target_ulong len, int type);
 240 int kvm_arch_remove_hw_breakpoint(target_ulong addr,
 241                                   target_ulong len, int type);
 242 void kvm_arch_remove_all_hw_breakpoints(void);
 243
 244 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg);
 245
 246 bool kvm_arch_stop_on_emulation_error(CPUState *cpu);
 247
 248 int kvm_check_extension(KVMState *s, unsigned int extension);
 249
 250 uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
 251                                       uint32_t index, int reg);
 252 void kvm_cpu_synchronize_state(CPUArchState *env);
 253
 254 /* generic hooks - to be moved/refactored once there are more users */
 255
 256 static inline void cpu_synchronize_state(CPUArchState *env)
 257 {
 258     if (kvm_enabled()) {
 259         kvm_cpu_synchronize_state(env);
 260     }
 261 }
 262
 263 #if !defined(CONFIG_USER_ONLY)
 264 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
 265                                        hwaddr *phys_addr);
 266 #endif
 267
 268 #endif /* NEED_CPU_H */
 269
 270 void kvm_cpu_synchronize_post_reset(CPUState *cpu);
 271 void kvm_cpu_synchronize_post_init(CPUState *cpu);
 272
 273 static inline void cpu_synchronize_post_reset(CPUState *cpu)
 274 {
 275     if (kvm_enabled()) {
 276         kvm_cpu_synchronize_post_reset(cpu);
 277     }
 278 }
 279
 280 static inline void cpu_synchronize_post_init(CPUState *cpu)
 281 {
 282     if (kvm_enabled()) {
 283         kvm_cpu_synchronize_post_init(cpu);
 284     }
 285 }
 286
 287 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
 288 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg);
 289 void kvm_irqchip_release_virq(KVMState *s, int virq);
 290
 291 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);
 292 int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);
 293 void kvm_pc_gsi_handler(void *opaque, int n, int level);
 294 void kvm_pc_setup_irq_routing(bool pci_enabled);
 295 #endif