kvm: validate context for kvm cpu get/put operations

[qemu.git] / kvm.h

/*
 * 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 <stdbool.h>
#include <errno.h>
#include "config-host.h"
#include "qemu-queue.h"

#ifdef CONFIG_KVM
#include <linux/kvm.h>
#endif

extern int kvm_allowed;

#if defined CONFIG_KVM || !defined NEED_CPU_H
#define kvm_enabled() (kvm_allowed)
#else
#define kvm_enabled() (0)
#endif

struct kvm_run;

/* external API */

int kvm_init(int smp_cpus);

int kvm_has_sync_mmu(void);
int kvm_has_vcpu_events(void);
int kvm_has_robust_singlestep(void);
int kvm_has_debugregs(void);

#ifdef NEED_CPU_H
int kvm_init_vcpu(CPUState *env);

int kvm_cpu_exec(CPUState *env);

#if !defined(CONFIG_USER_ONLY)
int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size);
int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size);

void kvm_setup_guest_memory(void *start, size_t size);

int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
int kvm_uncoalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
void kvm_flush_coalesced_mmio_buffer(void);
#endif

int kvm_insert_breakpoint(CPUState *current_env, target_ulong addr,
                          target_ulong len, int type);
int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
                          target_ulong len, int type);
void kvm_remove_all_breakpoints(CPUState *current_env);
int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap);
#ifndef _WIN32
int kvm_set_signal_mask(CPUState *env, const sigset_t *sigset);
#endif

int kvm_pit_in_kernel(void);
int kvm_irqchip_in_kernel(void);

/* internal API */

struct KVMState;
typedef struct KVMState KVMState;

int kvm_ioctl(KVMState *s, int type, ...);

int kvm_vm_ioctl(KVMState *s, int type, ...);

int kvm_vcpu_ioctl(CPUState *env, int type, ...);

/* Arch specific hooks */

int kvm_arch_post_run(CPUState *env, struct kvm_run *run);

int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run);

int kvm_arch_pre_run(CPUState *env, struct kvm_run *run);

int kvm_arch_get_registers(CPUState *env);

/* 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 *env, int level);

int kvm_arch_init(KVMState *s, int smp_cpus);

int kvm_arch_init_vcpu(CPUState *env);

void kvm_arch_reset_vcpu(CPUState *env);

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);

int kvm_arch_debug(struct kvm_debug_exit_arch *arch_info);

struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
                                                 target_ulong pc);

int kvm_sw_breakpoints_active(CPUState *env);

int kvm_arch_insert_sw_breakpoint(CPUState *current_env,
                                  struct kvm_sw_breakpoint *bp);
int kvm_arch_remove_sw_breakpoint(CPUState *current_env,
                                  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 *env, struct kvm_guest_debug *dbg);

int kvm_check_extension(KVMState *s, unsigned int extension);

uint32_t kvm_arch_get_supported_cpuid(CPUState *env, uint32_t function,
                                      int reg);
void kvm_cpu_synchronize_state(CPUState *env);
void kvm_cpu_synchronize_post_reset(CPUState *env);
void kvm_cpu_synchronize_post_init(CPUState *env);

/* generic hooks - to be moved/refactored once there are more users */

static inline void cpu_synchronize_state(CPUState *env)
{
    if (kvm_enabled()) {
        kvm_cpu_synchronize_state(env);
    }
}

static inline void cpu_synchronize_post_reset(CPUState *env)
{
    if (kvm_enabled()) {
        kvm_cpu_synchronize_post_reset(env);
    }
}

static inline void cpu_synchronize_post_init(CPUState *env)
{
    if (kvm_enabled()) {
        kvm_cpu_synchronize_post_init(env);
    }
}

#endif

int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign);
#endif