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 #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
  35
  36 /**
  37  * kvm_async_interrupts_enabled:
  38  *
  39  * Returns: true if we can deliver interrupts to KVM
  40  * asynchronously (ie by ioctl from any thread at any time)
  41  * rather than having to do interrupt delivery synchronously
  42  * (where the vcpu must be stopped at a suitable point first).
  43  */
  44 #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)
  45
  46 /**
  47  * kvm_irqfds_enabled:
  48  *
  49  * Returns: true if we can use irqfds to inject interrupts into
  50  * a KVM CPU (ie the kernel supports irqfds and we are running
  51  * with a configuration where it is meaningful to use them).
  52  */
  53 #define kvm_irqfds_enabled() (kvm_irqfds_allowed)
  54
  55 /**
  56  * kvm_msi_via_irqfd_enabled:
  57  *
  58  * Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
  59  * to a KVM CPU via an irqfd. This requires that the kernel supports
  60  * this and that we're running in a configuration that permits it.
  61  */
  62 #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
  63
  64 /**
  65  * kvm_gsi_routing_enabled:
  66  *
  67  * Returns: true if GSI routing is enabled (ie the kernel supports
  68  * it and we're running in a configuration that permits it).
  69  */
  70 #define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
  71
  72 #else
  73 #define kvm_enabled()           (0)
  74 #define kvm_irqchip_in_kernel() (false)
  75 #define kvm_async_interrupts_enabled() (false)
  76 #define kvm_irqfds_enabled() (false)
  77 #define kvm_msi_via_irqfd_enabled() (false)
  78 #define kvm_gsi_routing_allowed() (false)
  79 #endif
  80
  81 struct kvm_run;
  82 struct kvm_lapic_state;
  83
  84 typedef struct KVMCapabilityInfo {
  85     const char *name;
  86     int value;
  87 } KVMCapabilityInfo;
  88
  89 #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
  90 #define KVM_CAP_LAST_INFO { NULL, 0 }
  91
  92 struct KVMState;
  93 typedef struct KVMState KVMState;
  94 extern KVMState *kvm_state;
  95
  96 /* external API */
  97
  98 int kvm_init(void);
  99
 100 int kvm_has_sync_mmu(void);
 101 int kvm_has_vcpu_events(void);
 102 int kvm_has_robust_singlestep(void);
 103 int kvm_has_debugregs(void);
 104 int kvm_has_xsave(void);
 105 int kvm_has_xcrs(void);
 106 int kvm_has_pit_state2(void);
 107 int kvm_has_many_ioeventfds(void);
 108 int kvm_has_gsi_routing(void);
 109
 110 #ifdef NEED_CPU_H
 111 int kvm_init_vcpu(CPUArchState *env);
 112
 113 int kvm_cpu_exec(CPUArchState *env);
 114
 115 #if !defined(CONFIG_USER_ONLY)
 116 void *kvm_vmalloc(ram_addr_t size);
 117 void *kvm_arch_vmalloc(ram_addr_t size);
 118 void kvm_setup_guest_memory(void *start, size_t size);
 119
 120 int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
 121 int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
 122 void kvm_flush_coalesced_mmio_buffer(void);
 123 #endif
 124
 125 int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
 126                           target_ulong len, int type);
 127 int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
 128                           target_ulong len, int type);
 129 void kvm_remove_all_breakpoints(CPUArchState *current_env);
 130 int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap);
 131 #ifndef _WIN32
 132 int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset);
 133 #endif
 134
 135 int kvm_on_sigbus_vcpu(CPUArchState *env, int code, void *addr);
 136 int kvm_on_sigbus(int code, void *addr);
 137
 138 /* internal API */
 139
 140 int kvm_ioctl(KVMState *s, int type, ...);
 141
 142 int kvm_vm_ioctl(KVMState *s, int type, ...);
 143
 144 int kvm_vcpu_ioctl(CPUArchState *env, int type, ...);
 145
 146 /* Arch specific hooks */
 147
 148 extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
 149
 150 void kvm_arch_pre_run(CPUArchState *env, struct kvm_run *run);
 151 void kvm_arch_post_run(CPUArchState *env, struct kvm_run *run);
 152
 153 int kvm_arch_handle_exit(CPUArchState *env, struct kvm_run *run);
 154
 155 int kvm_arch_process_async_events(CPUArchState *env);
 156
 157 int kvm_arch_get_registers(CPUArchState *env);
 158
 159 /* state subset only touched by the VCPU itself during runtime */
 160 #define KVM_PUT_RUNTIME_STATE   1
 161 /* state subset modified during VCPU reset */
 162 #define KVM_PUT_RESET_STATE     2
 163 /* full state set, modified during initialization or on vmload */
 164 #define KVM_PUT_FULL_STATE      3
 165
 166 int kvm_arch_put_registers(CPUArchState *env, int level);
 167
 168 int kvm_arch_init(KVMState *s);
 169
 170 int kvm_arch_init_vcpu(CPUArchState *env);
 171
 172 void kvm_arch_reset_vcpu(CPUArchState *env);
 173
 174 int kvm_arch_on_sigbus_vcpu(CPUArchState *env, int code, void *addr);
 175 int kvm_arch_on_sigbus(int code, void *addr);
 176
 177 void kvm_arch_init_irq_routing(KVMState *s);
 178
 179 int kvm_set_irq(KVMState *s, int irq, int level);
 180 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);
 181
 182 void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
 183
 184 void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
 185 void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
 186
 187 struct kvm_guest_debug;
 188 struct kvm_debug_exit_arch;
 189
 190 struct kvm_sw_breakpoint {
 191     target_ulong pc;
 192     target_ulong saved_insn;
 193     int use_count;
 194     QTAILQ_ENTRY(kvm_sw_breakpoint) entry;
 195 };
 196
 197 QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
 198
 199 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUArchState *env,
 200                                                  target_ulong pc);
 201
 202 int kvm_sw_breakpoints_active(CPUArchState *env);
 203
 204 int kvm_arch_insert_sw_breakpoint(CPUArchState *current_env,
 205                                   struct kvm_sw_breakpoint *bp);
 206 int kvm_arch_remove_sw_breakpoint(CPUArchState *current_env,
 207                                   struct kvm_sw_breakpoint *bp);
 208 int kvm_arch_insert_hw_breakpoint(target_ulong addr,
 209                                   target_ulong len, int type);
 210 int kvm_arch_remove_hw_breakpoint(target_ulong addr,
 211                                   target_ulong len, int type);
 212 void kvm_arch_remove_all_hw_breakpoints(void);
 213
 214 void kvm_arch_update_guest_debug(CPUArchState *env, struct kvm_guest_debug *dbg);
 215
 216 bool kvm_arch_stop_on_emulation_error(CPUArchState *env);
 217
 218 int kvm_check_extension(KVMState *s, unsigned int extension);
 219
 220 uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
 221                                       uint32_t index, int reg);
 222 void kvm_cpu_synchronize_state(CPUArchState *env);
 223 void kvm_cpu_synchronize_post_reset(CPUArchState *env);
 224 void kvm_cpu_synchronize_post_init(CPUArchState *env);
 225
 226 /* generic hooks - to be moved/refactored once there are more users */
 227
 228 static inline void cpu_synchronize_state(CPUArchState *env)
 229 {
 230     if (kvm_enabled()) {
 231         kvm_cpu_synchronize_state(env);
 232     }
 233 }
 234
 235 static inline void cpu_synchronize_post_reset(CPUArchState *env)
 236 {
 237     if (kvm_enabled()) {
 238         kvm_cpu_synchronize_post_reset(env);
 239     }
 240 }
 241
 242 static inline void cpu_synchronize_post_init(CPUArchState *env)
 243 {
 244     if (kvm_enabled()) {
 245         kvm_cpu_synchronize_post_init(env);
 246     }
 247 }
 248
 249
 250 #if !defined(CONFIG_USER_ONLY)
 251 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
 252                                        target_phys_addr_t *phys_addr);
 253 #endif
 254
 255 #endif
 256 int kvm_set_ioeventfd_mmio(int fd, uint32_t adr, uint32_t val, bool assign,
 257                            uint32_t size);
 258
 259 int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign);
 260
 261 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
 262 void kvm_irqchip_release_virq(KVMState *s, int virq);
 263
 264 int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq);
 265 int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq);
 266 int kvm_irqchip_add_irq_notifier(KVMState *s, EventNotifier *n, int virq);
 267 int kvm_irqchip_remove_irq_notifier(KVMState *s, EventNotifier *n, int virq);
 268 #endif