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_kvm {
  27        /* Is the timer enabled */
  28        bool                    enabled;
  29
  30        /* Virtual offset */
  31        cycle_t                 cntvoff;
  32};
  33
  34struct arch_timer_cpu {
  35        /* Registers: control register, timer value */
  36        u32                             cntv_ctl;       /* Saved/restored */
  37        cycle_t                         cntv_cval;      /* Saved/restored */
  38
  39        /*
  40         * Anything that is not used directly from assembly code goes
  41         * here.
  42         */
  43
  44        /* Background timer used when the guest is not running */
  45        struct hrtimer                  timer;
  46
  47        /* Work queued with the above timer expires */
  48        struct work_struct              expired;
  49
  50        /* Background timer active */
  51        bool                            armed;
  52
  53        /* Timer IRQ */
  54        struct kvm_irq_level            irq;
  55
  56        /* VGIC mapping */
  57        struct irq_phys_map             *map;
  58
  59        /* Active IRQ state caching */
  60        bool                            active_cleared_last;
  61};
  62
  63int kvm_timer_hyp_init(void);
  64void kvm_timer_enable(struct kvm *kvm);
  65void kvm_timer_init(struct kvm *kvm);
  66int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
  67                         const struct kvm_irq_level *irq);
  68void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
  69void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu);
  70void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
  71void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
  72
  73u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
  74int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
  75
  76bool kvm_timer_should_fire(struct kvm_vcpu *vcpu);
  77void kvm_timer_schedule(struct kvm_vcpu *vcpu);
  78void kvm_timer_unschedule(struct kvm_vcpu *vcpu);
  79
  80void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
  81
  82#endif
  83