| /* |
| * QEMU KVM support |
| * |
| * Copyright IBM, Corp. 2008 |
| * |
| * Authors: |
| * Anthony Liguori <aliguori@us.ibm.com> |
| * |
| * 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 "qemu/queue.h" |
| #include "qom/cpu.h" |
| #include "exec/memattrs.h" |
| #include "hw/irq.h" |
| |
| #ifdef NEED_CPU_H |
| # ifdef CONFIG_KVM |
| # include <linux/kvm.h> |
| # define CONFIG_KVM_IS_POSSIBLE |
| # endif |
| #else |
| # define CONFIG_KVM_IS_POSSIBLE |
| #endif |
| |
| #ifdef CONFIG_KVM_IS_POSSIBLE |
| |
| extern bool kvm_allowed; |
| extern bool kvm_kernel_irqchip; |
| extern bool kvm_split_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; |
| extern bool kvm_msi_use_devid; |
| |
| #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_irqchip_is_split: |
| * |
| * Returns: true if the user asked us to split the irqchip |
| * implementation between user and kernel space. The details are |
| * architecture and machine specific. On PC, it means that the PIC, |
| * IOAPIC, and PIT are in user space while the LAPIC is in the kernel. |
| */ |
| #define kvm_irqchip_is_split() (kvm_split_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) |
| |
| /** |
| * kvm_msi_devid_required: |
| * Returns: true if KVM requires a device id to be provided while |
| * defining an MSI routing entry. |
| */ |
| #define kvm_msi_devid_required() (kvm_msi_use_devid) |
| |
| #else |
| |
| #define kvm_enabled() (0) |
| #define kvm_irqchip_in_kernel() (false) |
| #define kvm_irqchip_is_split() (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) |
| #define kvm_msi_devid_required() (false) |
| |
| #endif /* CONFIG_KVM_IS_POSSIBLE */ |
| |
| 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); |
| bool 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); |
| int kvm_destroy_vcpu(CPUState *cpu); |
| |
| /** |
| * kvm_arm_supports_user_irq |
| * |
| * Not all KVM implementations support notifications for kernel generated |
| * interrupt events to user space. This function indicates whether the current |
| * KVM implementation does support them. |
| * |
| * Returns: true if KVM supports using kernel generated IRQs from user space |
| */ |
| bool kvm_arm_supports_user_irq(void); |
| |
| /** |
| * kvm_memcrypt_enabled - return boolean indicating whether memory encryption |
| * is enabled |
| * Returns: 1 memory encryption is enabled |
| * 0 memory encryption is disabled |
| */ |
| bool kvm_memcrypt_enabled(void); |
| |
| /** |
| * kvm_memcrypt_encrypt_data: encrypt the memory range |
| * |
| * Return: 1 failed to encrypt the range |
| * 0 succesfully encrypted memory region |
| */ |
| int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len); |
| |
| |
| #ifdef NEED_CPU_H |
| #include "cpu.h" |
| |
| 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); |
| |
| 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, bool shared)); |
| |
| /* 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 |
| * @errp: error object handle |
| * |
| * Returns: 0 on success |
| * < 0 on error |
| * Use kvm_device_check_attr() in order to check for the availability |
| * of optional attributes. |
| */ |
| int kvm_device_access(int fd, int group, uint64_t attr, |
| void *val, bool write, Error **errp); |
| |
| /** |
| * 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); |
| |
| /** |
| * kvm_device_supported - probe whether KVM supports specific device |
| * |
| * @vmfd: The fd handler for VM |
| * @type: type of device |
| * |
| * @return: true if supported, otherwise false. |
| */ |
| bool kvm_device_supported(int vmfd, uint64_t type); |
| |
| /* 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); |
| |
| bool kvm_vcpu_id_is_valid(int vcpu_id); |
| |
| /* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */ |
| unsigned long kvm_arch_vcpu_id(CPUState *cpu); |
| |
| #ifdef TARGET_I386 |
| #define KVM_HAVE_MCE_INJECTION 1 |
| void kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr); |
| #endif |
| |
| 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); |
| |
| /* Notify arch about newly added MSI routes */ |
| int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route, |
| int vector, PCIDevice *dev); |
| /* Notify arch about released MSI routes */ |
| int kvm_arch_release_virq_post(int virq); |
| |
| 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_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__ }; \ |
| size_t n = MIN(ARRAY_SIZE(args_tmp), ARRAY_SIZE(cap.args)); \ |
| memcpy(cap.args, args_tmp, n * sizeof(cap.args[0])); \ |
| 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__ }; \ |
| size_t n = MIN(ARRAY_SIZE(args_tmp), ARRAY_SIZE(cap.args)); \ |
| memcpy(cap.args, args_tmp, n * sizeof(cap.args[0])); \ |
| 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); |
| void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu); |
| |
| void kvm_init_cpu_signals(CPUState *cpu); |
| |
| /** |
| * kvm_irqchip_add_msi_route - Add MSI route for specific vector |
| * @s: KVM state |
| * @vector: which vector to add. This can be either MSI/MSIX |
| * vector. The function will automatically detect whether |
| * MSI/MSIX is enabled, and fetch corresponding MSI |
| * message. |
| * @dev: Owner PCI device to add the route. If @dev is specified |
| * as @NULL, an empty MSI message will be inited. |
| * @return: virq (>=0) when success, errno (<0) when failed. |
| */ |
| int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev); |
| int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, |
| PCIDevice *dev); |
| void kvm_irqchip_commit_routes(KVMState *s); |
| void kvm_irqchip_release_virq(KVMState *s, int virq); |
| |
| int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter); |
| int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint); |
| |
| 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 |
| * @MachineState: The MachineState 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(MachineState *ms, 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); |
| struct ppc_radix_page_info *kvm_get_radix_page_info(void); |
| int kvm_get_max_memslots(void); |
| #endif |