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
  21 #ifdef CONFIG_KVM
  22 #include <linux/kvm.h>
  23 #endif
  24
  25 extern int kvm_allowed;
  26 extern bool kvm_kernel_irqchip;
  27 extern bool kvm_async_interrupts_allowed;
  28 extern bool kvm_irqfds_allowed;
  29 extern bool kvm_msi_via_irqfd_allowed;
  30 extern bool kvm_gsi_routing_allowed;
  31
  32 #if defined CONFIG_KVM || !defined NEED_CPU_H
  33 #define kvm_enabled()           (kvm_allowed)
  34 /**
  35  * kvm_irqchip_in_kernel:
  36  *
  37  * Returns: true if the user asked us to create an in-kernel
  38  * irqchip via the "kernel_irqchip=on" machine option.
  39  * What this actually means is architecture and machine model
  40  * specific: on PC, for instance, it means that the LAPIC,
  41  * IOAPIC and PIT are all in kernel. This function should never
  42  * be used from generic target-independent code: use one of the
  43  * following functions or some other specific check instead.
  44  */
  45 #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
  46
  47 /**
  48  * kvm_async_interrupts_enabled:
  49  *
  50  * Returns: true if we can deliver interrupts to KVM
  51  * asynchronously (ie by ioctl from any thread at any time)
  52  * rather than having to do interrupt delivery synchronously
  53  * (where the vcpu must be stopped at a suitable point first).
  54  */
  55 #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)
  56
  57 /**
  58  * kvm_irqfds_enabled:
  59  *
  60  * Returns: true if we can use irqfds to inject interrupts into
  61  * a KVM CPU (ie the kernel supports irqfds and we are running
  62  * with a configuration where it is meaningful to use them).
  63  */
  64 #define kvm_irqfds_enabled() (kvm_irqfds_allowed)
  65
  66 /**
  67  * kvm_msi_via_irqfd_enabled:
  68  *
  69  * Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
  70  * to a KVM CPU via an irqfd. This requires that the kernel supports
  71  * this and that we're running in a configuration that permits it.
  72  */
  73 #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
  74
  75 /**
  76  * kvm_gsi_routing_enabled:
  77  *
  78  * Returns: true if GSI routing is enabled (ie the kernel supports
  79  * it and we're running in a configuration that permits it).
  80  */
  81 #define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
  82
  83 #else
  84 #define kvm_enabled()           (0)
  85 #define kvm_irqchip_in_kernel() (false)
  86 #define kvm_async_interrupts_enabled() (false)
  87 #define kvm_irqfds_enabled() (false)
  88 #define kvm_msi_via_irqfd_enabled() (false)
  89 #define kvm_gsi_routing_allowed() (false)
  90 #endif
  91
  92 struct kvm_run;
  93 struct kvm_lapic_state;
  94
  95 typedef struct KVMCapabilityInfo {
  96     const char *name;
  97     int value;
  98 } KVMCapabilityInfo;
  99
 100 #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
 101 #define KVM_CAP_LAST_INFO { NULL, 0 }
 102
 103 struct KVMState;
 104 typedef struct KVMState KVMState;
 105 extern KVMState *kvm_state;
 106
 107 /* external API */
 108
 109 int kvm_init(void);
 110
 111 int kvm_has_sync_mmu(void);
 112 int kvm_has_vcpu_events(void);
 113 int kvm_has_robust_singlestep(void);
 114 int kvm_has_debugregs(void);
 115 int kvm_has_xsave(void);
 116 int kvm_has_xcrs(void);
 117 int kvm_has_pit_state2(void);
 118 int kvm_has_many_ioeventfds(void);
 119 int kvm_has_gsi_routing(void);
 120 int kvm_has_intx_set_mask(void);
 121
 122 #ifdef NEED_CPU_H
 123 int kvm_init_vcpu(CPUArchState *env);
 124
 125 int kvm_cpu_exec(CPUArchState *env);
 126
 127 #if !defined(CONFIG_USER_ONLY)
 128 void *kvm_vmalloc(ram_addr_t size);
 129 void *kvm_arch_vmalloc(ram_addr_t size);
 130 void kvm_setup_guest_memory(void *start, size_t size);
 131
 132 int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
 133 int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
 134 void kvm_flush_coalesced_mmio_buffer(void);
 135 #endif
 136
 137 int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
 138                           target_ulong len, int type);
 139 int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
 140                           target_ulong len, int type);
 141 void kvm_remove_all_breakpoints(CPUArchState *current_env);
 142 int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap);
 143 #ifndef _WIN32
 144 int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset);
 145 #endif
 146
 147 int kvm_on_sigbus_vcpu(CPUArchState *env, int code, void *addr);
 148 int kvm_on_sigbus(int code, void *addr);
 149 #endif /* NEED_CPU_H */
 150
 151 /* internal API */
 152
 153 int kvm_ioctl(KVMState *s, int type, ...);
 154
 155 int kvm_vm_ioctl(KVMState *s, int type, ...);
 156
 157 #ifdef NEED_CPU_H
 158 int kvm_vcpu_ioctl(CPUArchState *env, int type, ...);
 159
 160 /* Arch specific hooks */
 161
 162 extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
 163
 164 void kvm_arch_pre_run(CPUArchState *env, struct kvm_run *run);
 165 void kvm_arch_post_run(CPUArchState *env, struct kvm_run *run);
 166
 167 int kvm_arch_handle_exit(CPUArchState *env, struct kvm_run *run);
 168
 169 int kvm_arch_process_async_events(CPUArchState *env);
 170
 171 int kvm_arch_get_registers(CPUArchState *env);
 172
 173 /* state subset only touched by the VCPU itself during runtime */
 174 #define KVM_PUT_RUNTIME_STATE   1
 175 /* state subset modified during VCPU reset */
 176 #define KVM_PUT_RESET_STATE     2
 177 /* full state set, modified during initialization or on vmload */
 178 #define KVM_PUT_FULL_STATE      3
 179
 180 int kvm_arch_put_registers(CPUArchState *env, int level);
 181
 182 int kvm_arch_init(KVMState *s);
 183
 184 int kvm_arch_init_vcpu(CPUArchState *env);
 185
 186 void kvm_arch_reset_vcpu(CPUArchState *env);
 187
 188 int kvm_arch_on_sigbus_vcpu(CPUArchState *env, int code, void *addr);
 189 int kvm_arch_on_sigbus(int code, void *addr);
 190
 191 void kvm_arch_init_irq_routing(KVMState *s);
 192
 193 int kvm_set_irq(KVMState *s, int irq, int level);
 194 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);
 195
 196 void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
 197
 198 void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
 199 void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
 200
 201 struct kvm_guest_debug;
 202 struct kvm_debug_exit_arch;
 203
 204 struct kvm_sw_breakpoint {
 205     target_ulong pc;
 206     target_ulong saved_insn;
 207     int use_count;
 208     QTAILQ_ENTRY(kvm_sw_breakpoint) entry;
 209 };
 210
 211 QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
 212
 213 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUArchState *env,
 214                                                  target_ulong pc);
 215
 216 int kvm_sw_breakpoints_active(CPUArchState *env);
 217
 218 int kvm_arch_insert_sw_breakpoint(CPUArchState *current_env,
 219                                   struct kvm_sw_breakpoint *bp);
 220 int kvm_arch_remove_sw_breakpoint(CPUArchState *current_env,
 221                                   struct kvm_sw_breakpoint *bp);
 222 int kvm_arch_insert_hw_breakpoint(target_ulong addr,
 223                                   target_ulong len, int type);
 224 int kvm_arch_remove_hw_breakpoint(target_ulong addr,
 225                                   target_ulong len, int type);
 226 void kvm_arch_remove_all_hw_breakpoints(void);
 227
 228 void kvm_arch_update_guest_debug(CPUArchState *env, struct kvm_guest_debug *dbg);
 229
 230 bool kvm_arch_stop_on_emulation_error(CPUArchState *env);
 231
 232 int kvm_check_extension(KVMState *s, unsigned int extension);
 233
 234 uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
 235                                       uint32_t index, int reg);
 236 void kvm_cpu_synchronize_state(CPUArchState *env);
 237 void kvm_cpu_synchronize_post_reset(CPUArchState *env);
 238 void kvm_cpu_synchronize_post_init(CPUArchState *env);
 239
 240 /* generic hooks - to be moved/refactored once there are more users */
 241
 242 static inline void cpu_synchronize_state(CPUArchState *env)
 243 {
 244     if (kvm_enabled()) {
 245         kvm_cpu_synchronize_state(env);
 246     }
 247 }
 248
 249 static inline void cpu_synchronize_post_reset(CPUArchState *env)
 250 {
 251     if (kvm_enabled()) {
 252         kvm_cpu_synchronize_post_reset(env);
 253     }
 254 }
 255
 256 static inline void cpu_synchronize_post_init(CPUArchState *env)
 257 {
 258     if (kvm_enabled()) {
 259         kvm_cpu_synchronize_post_init(env);
 260     }
 261 }
 262
 263
 264 #if !defined(CONFIG_USER_ONLY)
 265 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
 266                                        target_phys_addr_t *phys_addr);
 267 #endif
 268
 269 #endif
 270 int kvm_set_ioeventfd_mmio(int fd, uint32_t adr, uint32_t val, bool assign,
 271                            uint32_t size);
 272
 273 int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign);
 274
 275 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
 276 void kvm_irqchip_release_virq(KVMState *s, int virq);
 277
 278 int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq);
 279 int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq);
 280 int kvm_irqchip_add_irq_notifier(KVMState *s, EventNotifier *n, int virq);
 281 int kvm_irqchip_remove_irq_notifier(KVMState *s, EventNotifier *n, int virq);
 282
 283 int kvm_get_irq_route_gsi(void);
 284
 285 void kvm_irqchip_commit_routes(KVMState *s);
 286
 287 #ifdef NEED_CPU_H
 288 #include "qemu-kvm.h"
 289 #endif
 290
 291 #endif