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
  31 #if defined CONFIG_KVM || !defined NEED_CPU_H
  32 #define kvm_enabled()           (kvm_allowed)
  33 #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
  34
  35 /**
  36  * kvm_async_interrupts_enabled:
  37  *
  38  * Returns: true if we can deliver interrupts to KVM
  39  * asynchronously (ie by ioctl from any thread at any time)
  40  * rather than having to do interrupt delivery synchronously
  41  * (where the vcpu must be stopped at a suitable point first).
  42  */
  43 #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)
  44
  45 /**
  46  * kvm_irqfds_enabled:
  47  *
  48  * Returns: true if we can use irqfds to inject interrupts into
  49  * a KVM CPU (ie the kernel supports irqfds and we are running
  50  * with a configuration where it is meaningful to use them).
  51  */
  52 #define kvm_irqfds_enabled() (kvm_irqfds_allowed)
  53
  54 /**
  55  * kvm_msi_via_irqfd_enabled:
  56  *
  57  * Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
  58  * to a KVM CPU via an irqfd. This requires that the kernel supports
  59  * this and that we're running in a configuration that permits it.
  60  */
  61 #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
  62
  63 #else
  64 #define kvm_enabled()           (0)
  65 #define kvm_irqchip_in_kernel() (false)
  66 #define kvm_async_interrupts_enabled() (false)
  67 #define kvm_irqfds_enabled() (false)
  68 #define kvm_msi_via_irqfd_enabled() (false)
  69 #endif
  70
  71 struct kvm_run;
  72 struct kvm_lapic_state;
  73
  74 typedef struct KVMCapabilityInfo {
  75     const char *name;
  76     int value;
  77 } KVMCapabilityInfo;
  78
  79 #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
  80 #define KVM_CAP_LAST_INFO { NULL, 0 }
  81
  82 struct KVMState;
  83 typedef struct KVMState KVMState;
  84 extern KVMState *kvm_state;
  85
  86 /* external API */
  87
  88 int kvm_init(void);
  89
  90 int kvm_has_sync_mmu(void);
  91 int kvm_has_vcpu_events(void);
  92 int kvm_has_robust_singlestep(void);
  93 int kvm_has_debugregs(void);
  94 int kvm_has_xsave(void);
  95 int kvm_has_xcrs(void);
  96 int kvm_has_pit_state2(void);
  97 int kvm_has_many_ioeventfds(void);
  98 int kvm_has_gsi_routing(void);
  99
 100 #ifdef NEED_CPU_H
 101 int kvm_init_vcpu(CPUArchState *env);
 102
 103 int kvm_cpu_exec(CPUArchState *env);
 104
 105 #if !defined(CONFIG_USER_ONLY)
 106 void *kvm_vmalloc(ram_addr_t size);
 107 void *kvm_arch_vmalloc(ram_addr_t size);
 108 void kvm_setup_guest_memory(void *start, size_t size);
 109
 110 int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
 111 int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
 112 void kvm_flush_coalesced_mmio_buffer(void);
 113 #endif
 114
 115 int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
 116                           target_ulong len, int type);
 117 int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
 118                           target_ulong len, int type);
 119 void kvm_remove_all_breakpoints(CPUArchState *current_env);
 120 int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap);
 121 #ifndef _WIN32
 122 int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset);
 123 #endif
 124
 125 int kvm_on_sigbus_vcpu(CPUArchState *env, int code, void *addr);
 126 int kvm_on_sigbus(int code, void *addr);
 127
 128 /* internal API */
 129
 130 int kvm_ioctl(KVMState *s, int type, ...);
 131
 132 int kvm_vm_ioctl(KVMState *s, int type, ...);
 133
 134 int kvm_vcpu_ioctl(CPUArchState *env, int type, ...);
 135
 136 /* Arch specific hooks */
 137
 138 extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
 139
 140 void kvm_arch_pre_run(CPUArchState *env, struct kvm_run *run);
 141 void kvm_arch_post_run(CPUArchState *env, struct kvm_run *run);
 142
 143 int kvm_arch_handle_exit(CPUArchState *env, struct kvm_run *run);
 144
 145 int kvm_arch_process_async_events(CPUArchState *env);
 146
 147 int kvm_arch_get_registers(CPUArchState *env);
 148
 149 /* state subset only touched by the VCPU itself during runtime */
 150 #define KVM_PUT_RUNTIME_STATE   1
 151 /* state subset modified during VCPU reset */
 152 #define KVM_PUT_RESET_STATE     2
 153 /* full state set, modified during initialization or on vmload */
 154 #define KVM_PUT_FULL_STATE      3
 155
 156 int kvm_arch_put_registers(CPUArchState *env, int level);
 157
 158 int kvm_arch_init(KVMState *s);
 159
 160 int kvm_arch_init_vcpu(CPUArchState *env);
 161
 162 void kvm_arch_reset_vcpu(CPUArchState *env);
 163
 164 int kvm_arch_on_sigbus_vcpu(CPUArchState *env, int code, void *addr);
 165 int kvm_arch_on_sigbus(int code, void *addr);
 166
 167 void kvm_arch_init_irq_routing(KVMState *s);
 168
 169 int kvm_set_irq(KVMState *s, int irq, int level);
 170 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);
 171
 172 void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
 173
 174 void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
 175 void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
 176
 177 struct kvm_guest_debug;
 178 struct kvm_debug_exit_arch;
 179
 180 struct kvm_sw_breakpoint {
 181     target_ulong pc;
 182     target_ulong saved_insn;
 183     int use_count;
 184     QTAILQ_ENTRY(kvm_sw_breakpoint) entry;
 185 };
 186
 187 QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
 188
 189 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUArchState *env,
 190                                                  target_ulong pc);
 191
 192 int kvm_sw_breakpoints_active(CPUArchState *env);
 193
 194 int kvm_arch_insert_sw_breakpoint(CPUArchState *current_env,
 195                                   struct kvm_sw_breakpoint *bp);
 196 int kvm_arch_remove_sw_breakpoint(CPUArchState *current_env,
 197                                   struct kvm_sw_breakpoint *bp);
 198 int kvm_arch_insert_hw_breakpoint(target_ulong addr,
 199                                   target_ulong len, int type);
 200 int kvm_arch_remove_hw_breakpoint(target_ulong addr,
 201                                   target_ulong len, int type);
 202 void kvm_arch_remove_all_hw_breakpoints(void);
 203
 204 void kvm_arch_update_guest_debug(CPUArchState *env, struct kvm_guest_debug *dbg);
 205
 206 bool kvm_arch_stop_on_emulation_error(CPUArchState *env);
 207
 208 int kvm_check_extension(KVMState *s, unsigned int extension);
 209
 210 uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
 211                                       uint32_t index, int reg);
 212 void kvm_cpu_synchronize_state(CPUArchState *env);
 213 void kvm_cpu_synchronize_post_reset(CPUArchState *env);
 214 void kvm_cpu_synchronize_post_init(CPUArchState *env);
 215
 216 /* generic hooks - to be moved/refactored once there are more users */
 217
 218 static inline void cpu_synchronize_state(CPUArchState *env)
 219 {
 220     if (kvm_enabled()) {
 221         kvm_cpu_synchronize_state(env);
 222     }
 223 }
 224
 225 static inline void cpu_synchronize_post_reset(CPUArchState *env)
 226 {
 227     if (kvm_enabled()) {
 228         kvm_cpu_synchronize_post_reset(env);
 229     }
 230 }
 231
 232 static inline void cpu_synchronize_post_init(CPUArchState *env)
 233 {
 234     if (kvm_enabled()) {
 235         kvm_cpu_synchronize_post_init(env);
 236     }
 237 }
 238
 239
 240 #if !defined(CONFIG_USER_ONLY)
 241 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
 242                                        target_phys_addr_t *phys_addr);
 243 #endif
 244
 245 #endif
 246 int kvm_set_ioeventfd_mmio(int fd, uint32_t adr, uint32_t val, bool assign,
 247                            uint32_t size);
 248
 249 int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign);
 250
 251 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
 252 void kvm_irqchip_release_virq(KVMState *s, int virq);
 253
 254 int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq);
 255 int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq);
 256 int kvm_irqchip_add_irq_notifier(KVMState *s, EventNotifier *n, int virq);
 257 int kvm_irqchip_remove_irq_notifier(KVMState *s, EventNotifier *n, int virq);
 258 #endif