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Linux/include/kvm/arm_arch_timer.h

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

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