root/include/kvm/arm_arch_timer.h

DEFINITIONS

1. kvm_timer_hyp_init
2. kvm_timer_init
3. kvm_timer_vcpu_reset
4. kvm_timer_vcpu_init
5. kvm_timer_flush_hwstate
6. kvm_timer_sync_hwstate
7. kvm_timer_vcpu_terminate
8. kvm_arm_timer_set_reg
9. kvm_arm_timer_get_reg

/*
 * Copyright (C) 2012 ARM Ltd.
 * Author: Marc Zyngier <marc.zyngier@arm.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef __ASM_ARM_KVM_ARCH_TIMER_H
#define __ASM_ARM_KVM_ARCH_TIMER_H

#include <linux/clocksource.h>
#include <linux/hrtimer.h>
#include <linux/workqueue.h>

struct arch_timer_kvm {
#ifdef CONFIG_KVM_ARM_TIMER
        /* Is the timer enabled */
        bool                    enabled;

        /* Virtual offset */
        cycle_t                 cntvoff;
#endif
};

struct arch_timer_cpu {
#ifdef CONFIG_KVM_ARM_TIMER
        /* Registers: control register, timer value */
        u32                             cntv_ctl;       /* Saved/restored */
        cycle_t                         cntv_cval;      /* Saved/restored */

        /*
         * Anything that is not used directly from assembly code goes
         * here.
         */

        /* Background timer used when the guest is not running */
        struct hrtimer                  timer;

        /* Work queued with the above timer expires */
        struct work_struct              expired;

        /* Background timer active */
        bool                            armed;

        /* Timer IRQ */
        const struct kvm_irq_level      *irq;
#endif
};

#ifdef CONFIG_KVM_ARM_TIMER
int kvm_timer_hyp_init(void);
int kvm_timer_init(struct kvm *kvm);
void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
                          const struct kvm_irq_level *irq);
void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu);
void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);

u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);

#else
static inline int kvm_timer_hyp_init(void)
{
        return 0;
};

static inline int kvm_timer_init(struct kvm *kvm)
{
        return 0;
}

static inline void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
                                        const struct kvm_irq_level *irq) {}
static inline void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) {}
static inline void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu) {}
static inline void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu) {}
static inline void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu) {}

static inline int kvm_arm_timer_set_reg(struct kvm_vcpu *vcpu, u64 regid, u64 value)
{
        return 0;
}

static inline u64 kvm_arm_timer_get_reg(struct kvm_vcpu *vcpu, u64 regid)
{
        return 0;
}
#endif

#endif