diff options
Diffstat (limited to 'src/include/sysemu/kvm.h')
| -rw-r--r-- | src/include/sysemu/kvm.h | 503 |
1 files changed, 503 insertions, 0 deletions
diff --git a/src/include/sysemu/kvm.h b/src/include/sysemu/kvm.h new file mode 100644 index 0000000..b31f325 --- /dev/null +++ b/src/include/sysemu/kvm.h @@ -0,0 +1,503 @@ +/* + * 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 <errno.h> +#include "config-host.h" +#include "qemu/queue.h" +#include "qom/cpu.h" +#include "exec/memattrs.h" +#include "hw/irq.h" + +#ifdef CONFIG_KVM +#include <linux/kvm.h> +#include <linux/kvm_para.h> +#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 |
