/* * QEMU KVM support * * Copyright IBM, Corp. 2008 * * Authors: * Anthony Liguori * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. * */ #ifndef QEMU_KVM_H #define QEMU_KVM_H #include #include "config-host.h" #include "qemu/queue.h" #include "qom/cpu.h" #include "exec/memattrs.h" #include "hw/irq.h" #ifdef CONFIG_KVM #include #include #else /* These constants must never be used at runtime if kvm_enabled() is false. * They exist so we don't need #ifdefs around KVM-specific code that already * checks kvm_enabled() properly. */ #define KVM_CPUID_SIGNATURE 0 #define KVM_CPUID_FEATURES 0 #define KVM_FEATURE_CLOCKSOURCE 0 #define KVM_FEATURE_NOP_IO_DELAY 0 #define KVM_FEATURE_MMU_OP 0 #define KVM_FEATURE_CLOCKSOURCE2 0 #define KVM_FEATURE_ASYNC_PF 0 #define KVM_FEATURE_STEAL_TIME 0 #define KVM_FEATURE_PV_EOI 0 #define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 0 #endif extern bool kvm_allowed; extern bool kvm_kernel_irqchip; extern bool kvm_async_interrupts_allowed; extern bool kvm_halt_in_kernel_allowed; extern bool kvm_eventfds_allowed; extern bool kvm_irqfds_allowed; extern bool kvm_resamplefds_allowed; extern bool kvm_msi_via_irqfd_allowed; extern bool kvm_gsi_routing_allowed; extern bool kvm_gsi_direct_mapping; extern bool kvm_readonly_mem_allowed; extern bool kvm_direct_msi_allowed; extern bool kvm_ioeventfd_any_length_allowed; #if defined CONFIG_KVM || !defined NEED_CPU_H #define kvm_enabled() (kvm_allowed) /** * kvm_irqchip_in_kernel: * * Returns: true if the user asked us to create an in-kernel * irqchip via the "kernel_irqchip=on" machine option. * What this actually means is architecture and machine model * specific: on PC, for instance, it means that the LAPIC, * IOAPIC and PIT are all in kernel. This function should never * be used from generic target-independent code: use one of the * following functions or some other specific check instead. */ #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip) /** * kvm_async_interrupts_enabled: * * Returns: true if we can deliver interrupts to KVM * asynchronously (ie by ioctl from any thread at any time) * rather than having to do interrupt delivery synchronously * (where the vcpu must be stopped at a suitable point first). */ #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed) /** * kvm_halt_in_kernel * * Returns: true if halted cpus should still get a KVM_RUN ioctl to run * inside of kernel space. This only works if MP state is implemented. */ #define kvm_halt_in_kernel() (kvm_halt_in_kernel_allowed) /** * kvm_eventfds_enabled: * * Returns: true if we can use eventfds to receive notifications * from a KVM CPU (ie the kernel supports eventds and we are running * with a configuration where it is meaningful to use them). */ #define kvm_eventfds_enabled() (kvm_eventfds_allowed) /** * kvm_irqfds_enabled: * * Returns: true if we can use irqfds to inject interrupts into * a KVM CPU (ie the kernel supports irqfds and we are running * with a configuration where it is meaningful to use them). */ #define kvm_irqfds_enabled() (kvm_irqfds_allowed) /** * kvm_resamplefds_enabled: * * Returns: true if we can use resamplefds to inject interrupts into * a KVM CPU (ie the kernel supports resamplefds and we are running * with a configuration where it is meaningful to use them). */ #define kvm_resamplefds_enabled() (kvm_resamplefds_allowed) /** * kvm_msi_via_irqfd_enabled: * * Returns: true if we can route a PCI MSI (Message Signaled Interrupt) * to a KVM CPU via an irqfd. This requires that the kernel supports * this and that we're running in a configuration that permits it. */ #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed) /** * kvm_gsi_routing_enabled: * * Returns: true if GSI routing is enabled (ie the kernel supports * it and we're running in a configuration that permits it). */ #define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed) /** * kvm_gsi_direct_mapping: * * Returns: true if GSI direct mapping is enabled. */ #define kvm_gsi_direct_mapping() (kvm_gsi_direct_mapping) /** * kvm_readonly_mem_enabled: * * Returns: true if KVM readonly memory is enabled (ie the kernel * supports it and we're running in a configuration that permits it). */ #define kvm_readonly_mem_enabled() (kvm_readonly_mem_allowed) /** * kvm_direct_msi_enabled: * * Returns: true if KVM allows direct MSI injection. */ #define kvm_direct_msi_enabled() (kvm_direct_msi_allowed) /** * kvm_ioeventfd_any_length_enabled: * Returns: true if KVM allows any length io eventfd. */ #define kvm_ioeventfd_any_length_enabled() (kvm_ioeventfd_any_length_allowed) #else #define kvm_enabled() (0) #define kvm_irqchip_in_kernel() (false) #define kvm_async_interrupts_enabled() (false) #define kvm_halt_in_kernel() (false) #define kvm_eventfds_enabled() (false) #define kvm_irqfds_enabled() (false) #define kvm_resamplefds_enabled() (false) #define kvm_msi_via_irqfd_enabled() (false) #define kvm_gsi_routing_allowed() (false) #define kvm_gsi_direct_mapping() (false) #define kvm_readonly_mem_enabled() (false) #define kvm_direct_msi_enabled() (false) #define kvm_ioeventfd_any_length_enabled() (false) #endif struct kvm_run; struct kvm_lapic_state; struct kvm_irq_routing_entry; typedef struct KVMCapabilityInfo { const char *name; int value; } KVMCapabilityInfo; #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP } #define KVM_CAP_LAST_INFO { NULL, 0 } struct KVMState; typedef struct KVMState KVMState; extern KVMState *kvm_state; /* external API */ bool kvm_has_free_slot(MachineState *ms); int kvm_has_sync_mmu(void); int kvm_has_vcpu_events(void); int kvm_has_robust_singlestep(void); int kvm_has_debugregs(void); int kvm_has_pit_state2(void); int kvm_has_many_ioeventfds(void); int kvm_has_gsi_routing(void); int kvm_has_intx_set_mask(void); int kvm_init_vcpu(CPUState *cpu); int kvm_cpu_exec(CPUState *cpu); #ifdef NEED_CPU_H void kvm_setup_guest_memory(void *start, size_t size); void kvm_flush_coalesced_mmio_buffer(void); int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, target_ulong len, int type); int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, target_ulong len, int type); void kvm_remove_all_breakpoints(CPUState *cpu); int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap); #ifndef _WIN32 int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset); #endif int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr); int kvm_on_sigbus(int code, void *addr); /* interface with exec.c */ void phys_mem_set_alloc(void *(*alloc)(size_t, uint64_t *align)); /* internal API */ int kvm_ioctl(KVMState *s, int type, ...); int kvm_vm_ioctl(KVMState *s, int type, ...); int kvm_vcpu_ioctl(CPUState *cpu, int type, ...); /** * kvm_device_ioctl - call an ioctl on a kvm device * @fd: The KVM device file descriptor as returned from KVM_CREATE_DEVICE * @type: The device-ctrl ioctl number * * Returns: -errno on error, nonnegative on success */ int kvm_device_ioctl(int fd, int type, ...); /** * kvm_vm_check_attr - check for existence of a specific vm attribute * @s: The KVMState pointer * @group: the group * @attr: the attribute of that group to query for * * Returns: 1 if the attribute exists * 0 if the attribute either does not exist or if the vm device * interface is unavailable */ int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr); /** * kvm_device_check_attr - check for existence of a specific device attribute * @fd: The device file descriptor * @group: the group * @attr: the attribute of that group to query for * * Returns: 1 if the attribute exists * 0 if the attribute either does not exist or if the vm device * interface is unavailable */ int kvm_device_check_attr(int fd, uint32_t group, uint64_t attr); /** * kvm_device_access - set or get value of a specific vm attribute * @fd: The device file descriptor * @group: the group * @attr: the attribute of that group to set or get * @val: pointer to a storage area for the value * @write: true for set and false for get operation * * This function is not allowed to fail. Use kvm_device_check_attr() * in order to check for the availability of optional attributes. */ void kvm_device_access(int fd, int group, uint64_t attr, void *val, bool write); /** * kvm_create_device - create a KVM device for the device control API * @KVMState: The KVMState pointer * @type: The KVM device type (see Documentation/virtual/kvm/devices in the * kernel source) * @test: If true, only test if device can be created, but don't actually * create the device. * * Returns: -errno on error, nonnegative on success: @test ? 0 : device fd; */ int kvm_create_device(KVMState *s, uint64_t type, bool test); /* Arch specific hooks */ extern const KVMCapabilityInfo kvm_arch_required_capabilities[]; void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run); MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run); int kvm_arch_handle_exit(CPUState *cpu, struct kvm_run *run); int kvm_arch_process_async_events(CPUState *cpu); int kvm_arch_get_registers(CPUState *cpu); /* state subset only touched by the VCPU itself during runtime */ #define KVM_PUT_RUNTIME_STATE 1 /* state subset modified during VCPU reset */ #define KVM_PUT_RESET_STATE 2 /* full state set, modified during initialization or on vmload */ #define KVM_PUT_FULL_STATE 3 int kvm_arch_put_registers(CPUState *cpu, int level); int kvm_arch_init(MachineState *ms, KVMState *s); int kvm_arch_init_vcpu(CPUState *cpu); /* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */ unsigned long kvm_arch_vcpu_id(CPUState *cpu); int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr); int kvm_arch_on_sigbus(int code, void *addr); void kvm_arch_init_irq_routing(KVMState *s); int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, uint64_t address, uint32_t data, PCIDevice *dev); int kvm_arch_msi_data_to_gsi(uint32_t data); int kvm_set_irq(KVMState *s, int irq, int level); int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg); void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin); void kvm_irqchip_commit_routes(KVMState *s); void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic); void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic); struct kvm_guest_debug; struct kvm_debug_exit_arch; struct kvm_sw_breakpoint { target_ulong pc; target_ulong saved_insn; int use_count; QTAILQ_ENTRY(kvm_sw_breakpoint) entry; }; QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint); struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, target_ulong pc); int kvm_sw_breakpoints_active(CPUState *cpu); int kvm_arch_insert_sw_breakpoint(CPUState *cpu, struct kvm_sw_breakpoint *bp); int kvm_arch_remove_sw_breakpoint(CPUState *cpu, struct kvm_sw_breakpoint *bp); int kvm_arch_insert_hw_breakpoint(target_ulong addr, target_ulong len, int type); int kvm_arch_remove_hw_breakpoint(target_ulong addr, target_ulong len, int type); void kvm_arch_remove_all_hw_breakpoints(void); void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg); bool kvm_arch_stop_on_emulation_error(CPUState *cpu); int kvm_check_extension(KVMState *s, unsigned int extension); int kvm_vm_check_extension(KVMState *s, unsigned int extension); #define kvm_vm_enable_cap(s, capability, cap_flags, ...) \ ({ \ struct kvm_enable_cap cap = { \ .cap = capability, \ .flags = cap_flags, \ }; \ uint64_t args_tmp[] = { __VA_ARGS__ }; \ int i; \ for (i = 0; i < (int)ARRAY_SIZE(args_tmp) && \ i < ARRAY_SIZE(cap.args); i++) { \ cap.args[i] = args_tmp[i]; \ } \ kvm_vm_ioctl(s, KVM_ENABLE_CAP, &cap); \ }) #define kvm_vcpu_enable_cap(cpu, capability, cap_flags, ...) \ ({ \ struct kvm_enable_cap cap = { \ .cap = capability, \ .flags = cap_flags, \ }; \ uint64_t args_tmp[] = { __VA_ARGS__ }; \ int i; \ for (i = 0; i < (int)ARRAY_SIZE(args_tmp) && \ i < ARRAY_SIZE(cap.args); i++) { \ cap.args[i] = args_tmp[i]; \ } \ kvm_vcpu_ioctl(cpu, KVM_ENABLE_CAP, &cap); \ }) uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function, uint32_t index, int reg); void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len); #if !defined(CONFIG_USER_ONLY) int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr, hwaddr *phys_addr); #endif #endif /* NEED_CPU_H */ void kvm_cpu_synchronize_state(CPUState *cpu); void kvm_cpu_synchronize_post_reset(CPUState *cpu); void kvm_cpu_synchronize_post_init(CPUState *cpu); /* generic hooks - to be moved/refactored once there are more users */ static inline void cpu_synchronize_state(CPUState *cpu) { if (kvm_enabled()) { kvm_cpu_synchronize_state(cpu); } } static inline void cpu_synchronize_post_reset(CPUState *cpu) { if (kvm_enabled()) { kvm_cpu_synchronize_post_reset(cpu); } } static inline void cpu_synchronize_post_init(CPUState *cpu) { if (kvm_enabled()) { kvm_cpu_synchronize_post_init(cpu); } } int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg, PCIDevice *dev); int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, PCIDevice *dev); void kvm_irqchip_release_virq(KVMState *s, int virq); int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter); int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, EventNotifier *rn, int virq); int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, int virq); int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, EventNotifier *rn, qemu_irq irq); int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, qemu_irq irq); void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi); void kvm_pc_gsi_handler(void *opaque, int n, int level); void kvm_pc_setup_irq_routing(bool pci_enabled); void kvm_init_irq_routing(KVMState *s); /** * kvm_arch_irqchip_create: * @KVMState: The KVMState pointer * * Allow architectures to create an in-kernel irq chip themselves. * * Returns: < 0: error * 0: irq chip was not created * > 0: irq chip was created */ int kvm_arch_irqchip_create(KVMState *s); /** * kvm_set_one_reg - set a register value in KVM via KVM_SET_ONE_REG ioctl * @id: The register ID * @source: The pointer to the value to be set. It must point to a variable * of the correct type/size for the register being accessed. * * Returns: 0 on success, or a negative errno on failure. */ int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source); /** * kvm_get_one_reg - get a register value from KVM via KVM_GET_ONE_REG ioctl * @id: The register ID * @target: The pointer where the value is to be stored. It must point to a * variable of the correct type/size for the register being accessed. * * Returns: 0 on success, or a negative errno on failure. */ int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target); #endif