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 void kvm_setup_guest_memory(void *start, size_t size); 148 149 void kvm_flush_coalesced_mmio_buffer(void); 150 #endif 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 void kvm_cpu_synchronize_post_reset(CPUState *cpu); 254 void kvm_cpu_synchronize_post_init(CPUState *cpu); 255 256 /* generic hooks - to be moved/refactored once there are more users */ 257 258 static inline void cpu_synchronize_state(CPUArchState *env) 259 { 260 if (kvm_enabled()) { 261 kvm_cpu_synchronize_state(env); 262 } 263 } 264 265 static inline void cpu_synchronize_post_reset(CPUState *cpu) 266 { 267 if (kvm_enabled()) { 268 kvm_cpu_synchronize_post_reset(cpu); 269 } 270 } 271 272 static inline void cpu_synchronize_post_init(CPUState *cpu) 273 { 274 if (kvm_enabled()) { 275 kvm_cpu_synchronize_post_init(cpu); 276 } 277 } 278 279 280 #if !defined(CONFIG_USER_ONLY) 281 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr, 282 hwaddr *phys_addr); 283 #endif 284 285 #endif 286 int kvm_set_ioeventfd_mmio(int fd, uint32_t adr, uint32_t val, bool assign, 287 uint32_t size); 288 289 int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign); 290 291 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg); 292 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg); 293 void kvm_irqchip_release_virq(KVMState *s, int virq); 294 295 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, int virq); 296 int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq); 297 void kvm_pc_gsi_handler(void *opaque, int n, int level); 298 void kvm_pc_setup_irq_routing(bool pci_enabled); 299 #endif 300