LXR linux/include/kvm/arm_arch

   1/*
   2 * Copyright (C) 2012 ARM Ltd.
   3 * Author: Marc Zyngier <marc.zyngier@arm.com>
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License version 2 as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  17 */
  18
  19#ifndef __ASM_ARM_KVM_ARCH_TIMER_H
  20#define __ASM_ARM_KVM_ARCH_TIMER_H
  21
  22#include <linux/clocksource.h>
  23#include <linux/hrtimer.h>
  24#include <linux/workqueue.h>
  25
  26struct arch_timer_context {
  27        /* Registers: control register, timer value */
  28        u32                             cnt_ctl;
  29        u64                             cnt_cval;
  30
  31        /* Timer IRQ */
  32        struct kvm_irq_level            irq;
  33
  34        /* Active IRQ state caching */
  35        bool                            active_cleared_last;
  36
  37        /* Virtual offset */
  38        u64                     cntvoff;
  39};
  40
  41struct arch_timer_cpu {
  42        struct arch_timer_context       vtimer;
  43        struct arch_timer_context       ptimer;
  44
  45        /* Background timer used when the guest is not running */
  46        struct hrtimer                  timer;
  47
  48        /* Work queued with the above timer expires */
  49        struct work_struct              expired;
  50
  51        /* Background timer active */
  52        bool                            armed;
  53
  54        /* Is the timer enabled */
  55        bool                    enabled;
  56};
  57
  58int kvm_timer_hyp_init(void);
  59int kvm_timer_enable(struct kvm_vcpu *vcpu);
  60int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
  61                         const struct kvm_irq_level *virt_irq,
  62                         const struct kvm_irq_level *phys_irq);
  63void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
  64void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu);
  65void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
  66void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
  67
  68u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
  69int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
  70
  71bool kvm_timer_should_fire(struct arch_timer_context *timer_ctx);
  72void kvm_timer_schedule(struct kvm_vcpu *vcpu);
  73void kvm_timer_unschedule(struct kvm_vcpu *vcpu);
  74
  75u64 kvm_phys_timer_read(void);
  76
  77void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
  78
  79void kvm_timer_init_vhe(void);
  80
  81#define vcpu_vtimer(v)  (&(v)->arch.timer_cpu.vtimer)
  82#define vcpu_ptimer(v)  (&(v)->arch.timer_cpu.ptimer)
  83#endif
  84