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_halt_in_kernel_allowed; 46 extern bool kvm_irqfds_allowed; 47 extern bool kvm_msi_via_irqfd_allowed; 48 extern bool kvm_gsi_routing_allowed; 49 extern bool kvm_readonly_mem_allowed; 50 51 #if defined CONFIG_KVM || !defined NEED_CPU_H 52 #define kvm_enabled() (kvm_allowed) 53 /** 54 * kvm_irqchip_in_kernel: 55 * 56 * Returns: true if the user asked us to create an in-kernel 57 * irqchip via the "kernel_irqchip=on" machine option. 58 * What this actually means is architecture and machine model 59 * specific: on PC, for instance, it means that the LAPIC, 60 * IOAPIC and PIT are all in kernel. This function should never 61 * be used from generic target-independent code: use one of the 62 * following functions or some other specific check instead. 63 */ 64 #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip) 65 66 /** 67 * kvm_async_interrupts_enabled: 68 * 69 * Returns: true if we can deliver interrupts to KVM 70 * asynchronously (ie by ioctl from any thread at any time) 71 * rather than having to do interrupt delivery synchronously 72 * (where the vcpu must be stopped at a suitable point first). 73 */ 74 #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed) 75 76 /** 77 * kvm_halt_in_kernel 78 * 79 * Returns: true if halted cpus should still get a KVM_RUN ioctl to run 80 * inside of kernel space. This only works if MP state is implemented. 81 */ 82 #define kvm_halt_in_kernel() (kvm_halt_in_kernel_allowed) 83 84 /** 85 * kvm_irqfds_enabled: 86 * 87 * Returns: true if we can use irqfds to inject interrupts into 88 * a KVM CPU (ie the kernel supports irqfds and we are running 89 * with a configuration where it is meaningful to use them). 90 */ 91 #define kvm_irqfds_enabled() (kvm_irqfds_allowed) 92 93 /** 94 * kvm_msi_via_irqfd_enabled: 95 * 96 * Returns: true if we can route a PCI MSI (Message Signaled Interrupt) 97 * to a KVM CPU via an irqfd. This requires that the kernel supports 98 * this and that we're running in a configuration that permits it. 99 */ 100 #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed) 101 102 /** 103 * kvm_gsi_routing_enabled: 104 * 105 * Returns: true if GSI routing is enabled (ie the kernel supports 106 * it and we're running in a configuration that permits it). 107 */ 108 #define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed) 109 110 /** 111 * kvm_readonly_mem_enabled: 112 * 113 * Returns: true if KVM readonly memory is enabled (ie the kernel 114 * supports it and we're running in a configuration that permits it). 115 */ 116 #define kvm_readonly_mem_enabled() (kvm_readonly_mem_allowed) 117 118 #else 119 #define kvm_enabled() (0) 120 #define kvm_irqchip_in_kernel() (false) 121 #define kvm_async_interrupts_enabled() (false) 122 #define kvm_halt_in_kernel() (false) 123 #define kvm_irqfds_enabled() (false) 124 #define kvm_msi_via_irqfd_enabled() (false) 125 #define kvm_gsi_routing_allowed() (false) 126 #define kvm_readonly_mem_enabled() (false) 127 #endif 128 129 struct kvm_run; 130 struct kvm_lapic_state; 131 132 typedef struct KVMCapabilityInfo { 133 const char *name; 134 int value; 135 } KVMCapabilityInfo; 136 137 #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP } 138 #define KVM_CAP_LAST_INFO { NULL, 0 } 139 140 struct KVMState; 141 typedef struct KVMState KVMState; 142 extern KVMState *kvm_state; 143 144 /* external API */ 145 146 int kvm_init(void); 147 148 int kvm_has_sync_mmu(void); 149 int kvm_has_vcpu_events(void); 150 int kvm_has_robust_singlestep(void); 151 int kvm_has_debugregs(void); 152 int kvm_has_xsave(void); 153 int kvm_has_xcrs(void); 154 int kvm_has_pit_state2(void); 155 int kvm_has_many_ioeventfds(void); 156 int kvm_has_gsi_routing(void); 157 int kvm_has_intx_set_mask(void); 158 159 int kvm_init_vcpu(CPUState *cpu); 160 int kvm_cpu_exec(CPUState *cpu); 161 162 #ifdef NEED_CPU_H 163 164 #if !defined(CONFIG_USER_ONLY) 165 void *kvm_ram_alloc(ram_addr_t size); 166 void *kvm_arch_ram_alloc(ram_addr_t size); 167 #endif 168 169 void kvm_setup_guest_memory(void *start, size_t size); 170 void kvm_flush_coalesced_mmio_buffer(void); 171 172 int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, 173 target_ulong len, int type); 174 int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, 175 target_ulong len, int type); 176 void kvm_remove_all_breakpoints(CPUState *cpu); 177 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap); 178 #ifndef _WIN32 179 int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset); 180 #endif 181 182 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr); 183 int kvm_on_sigbus(int code, void *addr); 184 185 /* internal API */ 186 187 int kvm_ioctl(KVMState *s, int type, ...); 188 189 int kvm_vm_ioctl(KVMState *s, int type, ...); 190 191 int kvm_vcpu_ioctl(CPUState *cpu, int type, ...); 192 193 /* Arch specific hooks */ 194 195 extern const KVMCapabilityInfo kvm_arch_required_capabilities[]; 196 197 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run); 198 void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run); 199 200 int kvm_arch_handle_exit(CPUState *cpu, struct kvm_run *run); 201 202 int kvm_arch_process_async_events(CPUState *cpu); 203 204 int kvm_arch_get_registers(CPUState *cpu); 205 206 /* state subset only touched by the VCPU itself during runtime */ 207 #define KVM_PUT_RUNTIME_STATE 1 208 /* state subset modified during VCPU reset */ 209 #define KVM_PUT_RESET_STATE 2 210 /* full state set, modified during initialization or on vmload */ 211 #define KVM_PUT_FULL_STATE 3 212 213 int kvm_arch_put_registers(CPUState *cpu, int level); 214 215 int kvm_arch_init(KVMState *s); 216 217 int kvm_arch_init_vcpu(CPUState *cpu); 218 219 /* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */ 220 unsigned long kvm_arch_vcpu_id(CPUState *cpu); 221 222 void kvm_arch_reset_vcpu(CPUState *cpu); 223 224 int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr); 225 int kvm_arch_on_sigbus(int code, void *addr); 226 227 void kvm_arch_init_irq_routing(KVMState *s); 228 229 int kvm_set_irq(KVMState *s, int irq, int level); 230 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg); 231 232 void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin); 233 void kvm_irqchip_commit_routes(KVMState *s); 234 235 void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic); 236 void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic); 237 238 struct kvm_guest_debug; 239 struct kvm_debug_exit_arch; 240 241 struct kvm_sw_breakpoint { 242 target_ulong pc; 243 target_ulong saved_insn; 244 int use_count; 245 QTAILQ_ENTRY(kvm_sw_breakpoint) entry; 246 }; 247 248 QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint); 249 250 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, 251 target_ulong pc); 252 253 int kvm_sw_breakpoints_active(CPUState *cpu); 254 255 int kvm_arch_insert_sw_breakpoint(CPUState *cpu, 256 struct kvm_sw_breakpoint *bp); 257 int kvm_arch_remove_sw_breakpoint(CPUState *cpu, 258 struct kvm_sw_breakpoint *bp); 259 int kvm_arch_insert_hw_breakpoint(target_ulong addr, 260 target_ulong len, int type); 261 int kvm_arch_remove_hw_breakpoint(target_ulong addr, 262 target_ulong len, int type); 263 void kvm_arch_remove_all_hw_breakpoints(void); 264 265 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg); 266 267 bool kvm_arch_stop_on_emulation_error(CPUState *cpu); 268 269 int kvm_check_extension(KVMState *s, unsigned int extension); 270 271 uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function, 272 uint32_t index, int reg); 273 void kvm_cpu_synchronize_state(CPUState *cpu); 274 275 /* generic hooks - to be moved/refactored once there are more users */ 276 277 static inline void cpu_synchronize_state(CPUState *cpu) 278 { 279 if (kvm_enabled()) { 280 kvm_cpu_synchronize_state(cpu); 281 } 282 } 283 284 #if !defined(CONFIG_USER_ONLY) 285 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr, 286 hwaddr *phys_addr); 287 #endif 288 289 #endif /* NEED_CPU_H */ 290 291 void kvm_cpu_synchronize_post_reset(CPUState *cpu); 292 void kvm_cpu_synchronize_post_init(CPUState *cpu); 293 294 static inline void cpu_synchronize_post_reset(CPUState *cpu) 295 { 296 if (kvm_enabled()) { 297 kvm_cpu_synchronize_post_reset(cpu); 298 } 299 } 300 301 static inline void cpu_synchronize_post_init(CPUState *cpu) 302 { 303 if (kvm_enabled()) { 304 kvm_cpu_synchronize_post_init(cpu); 305 } 306 } 307 308 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg); 309 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg); 310 void kvm_irqchip_release_virq(KVMState *s, int virq); 311 312 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, 313 EventNotifier *rn, int virq); 314 int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq); 315 void kvm_pc_gsi_handler(void *opaque, int n, int level); 316 void kvm_pc_setup_irq_routing(bool pci_enabled); 317 void kvm_init_irq_routing(KVMState *s); 318 #endif 319