Archipelago » qemu

/*

 * 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"

#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_irqfds_allowed;

extern bool kvm_msi_via_irqfd_allowed;

extern bool kvm_gsi_routing_allowed;

extern bool kvm_readonly_mem_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_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_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_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)

#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_irqfds_enabled() (false)

#define kvm_msi_via_irqfd_enabled() (false)

#define kvm_gsi_routing_allowed() (false)

#define kvm_readonly_mem_enabled() (false)

#endif

struct kvm_run;

struct kvm_lapic_state;

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 */

int kvm_init(void);

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_xsave(void);

int kvm_has_xcrs(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

#if !defined(CONFIG_USER_ONLY)

void *kvm_ram_alloc(ram_addr_t size);

void *kvm_arch_ram_alloc(ram_addr_t size);

#endif

void kvm_setup_guest_memory(void *start, size_t size);

void kvm_flush_coalesced_mmio_buffer(void);

int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,

                          target_ulong len, int type);

int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,

                          target_ulong len, int type);

void kvm_remove_all_breakpoints(CPUArchState *current_env);

int kvm_update_guest_debug(CPUArchState *env, 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);

/* 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, ...);

/* Arch specific hooks */

extern const KVMCapabilityInfo kvm_arch_required_capabilities[];

void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run);

void 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(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);

void kvm_arch_reset_vcpu(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_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_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 *current_cpu,

                                  struct kvm_sw_breakpoint *bp);

int kvm_arch_remove_sw_breakpoint(CPUState *current_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);

uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,

                                      uint32_t index, int reg);

void kvm_cpu_synchronize_state(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);

    }

}

#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_post_reset(CPUState *cpu);

void kvm_cpu_synchronize_post_init(CPUState *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);

int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg);

void kvm_irqchip_release_virq(KVMState *s, int virq);

int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);

int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);

void kvm_pc_gsi_handler(void *opaque, int n, int level);

void kvm_pc_setup_irq_routing(bool pci_enabled);

#endif